September 17, 2009
RAFAEL JACINTO CONVIT & WASHINGTON BRAIN & SPINE INSTITUTE, P.C., APPELLANTS/CROSS-APPELLEES,
EILEEN WILSON, APPELLEE/CROSS-APPELLANT.
Appeals from the Superior Court of the District of Columbia (CAB4014-03) (Hon. Frederick H. Weisberg, Trial Judge).
The opinion of the court was delivered by: Reid, Associate Judge
Argued November 6, 2008
Before REID, GLICKMAN, and THOMPSON, Associate Judges.
This is a medical malpractice action in which Eileen and Frederick Wilson, husband and wife, filed a two-count complaint against Dr. John Barrett, and against appellants/cross-appellees, Washington Brain & Spine Institute, P.C. ("WBSI") (Dr. Barrett's employer) and Dr. Rafael Jacinto Convit. Mr. Wilson alleged that Dr. Barrett and Dr. Convit's negligent treatment and care caused him to suffer severe and permanent neurologic injuries.*fn1 Mrs. Wilson claimed loss of consortium. Prior to trial, Mrs. Wilson entered into a settlement agreement (only with Dr. Barrett) regarding the loss of consortium claim; she released Dr. Barrett from the lawsuit, without prejudice, in exchange for $4,050,000.00. WBSI and Dr. Convit declined to settle and proceeded to trial. The jury found them jointly and severally liable and awarded Mr. Wilson $20,109,000.00 on his negligence claim (Count I) and Mrs. Wilson $2,500,000.00 for her loss of consortium claim (Count II).
WBSI and Dr. Convit filed post-verdict motions for judgment as a matter of law, or in the alternative, for a new trial. The trial court denied the motions on all grounds, with the exception of WBSI's and Dr. Convit's request that the jury verdict be reduced as a result of the settlement agreement signed by Mrs. Wilson and Dr. Barrett. As to the judgment relating to the loss of consortium claim and the $2,5000.000.00 award of damages, the trial court determined that WBSI was entitled to a pro tanto credit and Dr. Convit a pro rata credit, and that the $1,550,000.00 in excess funds from Mrs. Wilson's $4,050,000.00 settlement with Dr. Barrett should be applied to WBSI's joint and several liability of $20,109,000.00 on the negligence claim, thus reducing its liability to $18,559,000.00. Dr. Convit remained jointly and severally liable for the $20,109,000.00 negligence damages award.
On appeal, WBSI argues that the trial court erred when it determined that Mrs. Wilson's settlement with Dr. Barrett did not extinguish both the negligence and loss of consortium claims against WBSI, the vicariously liable employer. Dr. Convit contends, in part, that Mrs. Wilson produced insufficient evidence to prevail on the negligence claim against him, because "Dr. Barrett's failure to remove the shunt when Mr. Wilson was hospitalized the day after Dr. Convit's surgery constituted a superseding cause that relieved Dr. Convit of any liability." Both WBSI and Dr. Convit generally argue, in the alternative, that if this court rejects their primary arguments, the court should hold that in light of Dr. Barrett's settlement, the trial court erred by failing to grant them a 50% pro rata credit and reduction of the total amount of the jury's verdict as to both counts of the complaint. Mrs. Wilson cross-appeals on the ground that the trial court erred in calculating the settlement credits due WBSI and Dr. Convit.
We reverse the trial court's reduction of WBSI's liability for the award of damages on Mr. Wilson's negligence claim, but we affirm its judgment in all other respects.
The record shows that the events leading to Dr. Barrett's settlement and the jury verdict in this case began in early 1999 when Mr. Wilson began experiencing memory loss and gait problems. Dr. Mohammed Moussavian, a neurologist at Kaiser Permanente ("Kaiser"), referred him to Dr. Barrett, a neurosurgeon, and on December 2, 1999, Mr. and Mrs. Wilson met with Dr. Barrett. Dr. Barrett determined that Mr. Wilson was suffering from obstructive hydrocephalus*fn2 due to compression and obstruction in the aqueduct of Sylvius;*fn3 Dr. Barrett recommended that Mr. Wilson allow him to place a ventriculoperitoneal ("VP") shunt*fn4 into Mr. Wilson's right ventricle to clear the obstruction.*fn5 Mr. Wilson agreed to the procedure.
Dr. Barrett performed the operation at the Washington Hospital Center on December 8, 1999. To insert the VP shunt, Dr. Barrett cut a hole in the bone of Mr. Wilson's skull that was about the size of a dime; cut through the dura (a thick lining underneath the bone); placed a ventricular catheter (part of the plastic tubing) through the brain into the right ventricle; and threaded the peritoneal end of the catheter underneath the skin down to Mr. Wilson's abdomen.*fn6
During a second surgical procedure on December 11, 1999, necessitated because the initial tubing proved to be too short, Dr. Barrett inserted a longer catheter because "as the spinal fluid was draining down into the peritoneum, the ventricles became smaller [retracted] . . . and the [existing] catheter was lodged in the brain[;] it did not quite reach the ventricle." With two or three non-absorbable nylon sutures, Dr. Barrett anchored the reservoir to Mr. Wilson's head, closed the galea layer (the layer of skin under the scalp) with absorbable zero vicryl sutures, and stapled the skin closed.
At a follow-up appointment on February 22, 2000, Mrs. Wilson alerted Dr. Barrett to a little red scab that had formed over the posterior aspect of the incision. Dr. Barrett pushed on the wound to check for pain, tenderness, or other indications of an infection. He found none. Dr. Barrett told Mrs. Wilson that the scab would heal and recommended that Mr. Wilson put neomycin ointment, a triple antibiotic, on his head three times a day. Mr. Wilson followed Dr. Barrett's instructions; the scab eventually fell off. When Mr. and Mrs. Wilson returned to Dr. Barrett's office on April 18, Dr. Barrett noticed that the wound under the scab had dehiscence;*fn7 the size of the wound was about a quarter of an inch long. He could see the edge of the VP shunt reservoir.
Dr. Barrett wanted Mr. Wilson to consult with a plastic surgeon to discuss covering over the wound, and he contacted Dr. Moussavian on April 27. He "asked Dr. Moussavian to arrange a plastic surgery consultation." He did not request that Dr. Moussavian have the plastic surgeon proceed with an operation to cover the open wound.
On May 10, 2000, Dr. Convit received a referral marked urgent from Dr. Moussavian stating that Dr. Barrett wanted Dr. Convit to perform a flap procedure on Mr. Wilson's exposed VP shunt. Two days later, Dr. Convit met with Mr. and Mrs. Wilson at his office in the Washington Hospital Center. Mrs. Wilson told Dr. Convit that Mr. Wilson "had the shunt in [his head]; that the opening wouldn't close, and it had been open for five months."
Based on his examination of the wound, Dr. Convit believed it showed no clinical signs of infection and that he could safely cover the wound by performing a flap procedure.*fn8
However, before performing the flap procedure, Dr. Convit sent Mr. Wilson back to Kaiser for a preoperative evaluation, which included a complete blood count, and a surgery clearance. Mr. Wilson's white blood count showed no signs of a hidden infection; Kaiser cleared Mr. Wilson for the flap procedure on May 17.
On May 18, Dr. Convit still found no clinical signs of infection. He took pictures of the wound and then performed the flap procedure. During the course of the surgery, Dr. Convit "debrided the tissue around the shunt . . . and then mobilized the tissues to cover it." He also found some permanent sutures that he removed; they were embedded in the scar tissue around the exposed reservoir of the shunt. Sometime later that day, Dr. Convit released Mr. Wilson from his care.
The next morning, May 19, Mr. Wilson suffered a generalized seizure. He was taken to Calvert Memorial Hospital, and later, to the Washington Hospital Center. Upon his arrival at the Washington Hospital Center, Mr. Wilson was "severely comatose, unable to respond." Doctors placed an emergency shunt into Mr. Wilson's left ventricle to relieve pressure from his brain because the right shunt was blocked. A few days after the procedure, Mrs. Wilson saw Dr. Barrett who told her that Mr. Wilson's condition was caused by the flap procedure; he believed that during the procedure, "Dr. Convit kinked the tubing in behind the ear[.]" But, Dr. Barrett reassured her that he could "straighten that out" by placing "another shunt in on the [left] side and connect[ing] it to the . . . one [on the right side]."
On May 25, Dr. Barrett replaced the emergency shunt with a permanent left VP shunt. He left the nonoperational right shunt in because he did not find any signs of infection in the multiple cerebral spinal fluid samples drawn from the left lateral ventricle and he wanted to avoid the risk of removing the right shunt. On May 28, doctors performed a lumber puncture which showed abnormality in Mr. Wilson's white blood cell count. On May 29, doctors tested spinal fluid from the right shunt; it showed evidence of yeast called candida, and staph epidermidis, a bacteria. On May 29, Dr. Edward Aulisi removed the right and left shunts.
Upset by the treatment doctors provided Mr. Wilson at the Washington Hospital Center, Mrs. Wilson had him transferred to Johns Hopkins Hospital on June 26. From that point forward, Dr. Williams took over as Mr. Wilson's neurosurgeon. Mr. Wilson remained at Johns Hopkins for about five and a half weeks. He did not regain consciousness while there. Due to her inability to pay for her husband's medical care, Mrs. Wilson took him home and cared for him herself. Mr. Wilson eventually regained consciousness but remained bed ridden suffering from neurological problems.*fn9
Mr. and Mrs. Wilson filed their complaint on May 16, 2003. There were efforts along the way to settle the lawsuit for the limits of each defendant's insurance policy, totaling approximately $10,000,000.00. WBSI and Dr. Convit declined to settle, but on April 25, 2006, Mrs. Wilson and Dr. Barrett (and the attorneys for both) executed a settlement agreement (the "Agreement" or "the settlement agreement") for $4,050,000.00. In the Agreement the parties acknowledged that Mrs. Wilson's "Claim for loss of consortium is significant, and could easily be valued at $5,000,000.00 by the jury." The Agreement stated: "it is agreed by the parties that they have reached a partial settlement only, and only as to those claims that are part of Eileen's Claim against Dr. Barrett"; the Agreement "in no way release[s] the defendant [WBSI] from any part of [Mr. Wilson's] Claims against WBSI for Barrett's actions . . . " Although the Agreement provided that Mrs. Wilson would "not refile an action against Dr. Barrett for her own claim," Mrs. Wilson and Dr. Barrett "stipulate[d] and agree[d] that th[e] Agreement [was] not a release in any respect of Dr. Barrett's liability to the plaintiff [Mrs. Wilson] for [Mr. Wilson's] claim." The parties also agreed that "[s]ince the period of limitations has expired, Dr. Barrett . . . waives any . . . form of time bar recognized in the law in a subsequent action by the plaintiff against Dr. Barrett for damages for [Mr. Wilson's] claim, for a period of eighteen months from the date of this agreement." On April 25, 2006, the trial court granted Dr. Barrett's oral motion to be dismissed from the lawsuit "without prejudice" in light of the Agreement he entered into with Mr. and Mrs. Wilson.
WBSI immediately moved for summary judgment, claiming that because the Agreement released Dr. Barrett from the lawsuit, it also released WBSI, the vicariously liable party. The trial court denied WBSI's motion for summary judgment as to both the negligence and loss of consortium claims.*fn10
After a jury trial, beginning on April 26, 2006 and extending to May 22, 2006, during which the parties presented numerous fact and expert witnesses, the jury found WBSI and Dr. Convit jointly and severally liable on both the negligence and loss of consortium claims and awarded damages to Mr. Wilson in the amount of $20,109,000.00 and $2,500,000.00 to Mrs. Wilson. Dr. Convit and WBSI filed post-verdict motions for judgment as a matter of law or, in the alternative, for a new trial. In a seventeen-page written order, the trial court denied their motions, indicating generally that "[t]he liability issues were presented to the jury on conflicting expert testimony, and the resulting verdicts were not against the great weight of the evidence." Specifically, as it did before trial, the court rejected WBSI's contention that "the settlement of Mrs. Wilson's loss of consortium claim with Dr. Barrett, by operation of law, discharged not only the liability of WBSI to her on the loss of consortium claim, but its liability to Mr. Wilson as well." After reviewing the "litigation environment" and "context" at the time of the settlement, and the intent of the Wilsons and Dr. Barrett, the court determined that the parties to the agreement "deliberately structured their settlement in such a way as to preserve Plaintiffs' cause of action against both WBSI and Dr. Convit to the full extent possible beyond the one claim that was settled." Recognizing "these unusual facts" surrounding the settlement, noting the absence of applicable case law in this jurisdiction, and relying in part on case law from other jurisdictions and Restatements of the Law, the court declared that "the settlement of Mrs. Wilson's loss of consortium claim with Dr. Barrett probably did not release even that claim against WBSI, and almost certainly it did not release or discharge the liability of WBSI on Mr. Wilson's personal injury claim, even though the liability of WBSI, vel non, was solely vicarious."
The trial court, however, agreed with Dr. Convit and WBSI that under the case law in this jurisdiction they, as "non-settling tortfeasors[,] are entitled to a credit against [the jury] verdict based on a settlement between the plaintiff and another party" due to Dr. Barrett's settlement agreement with Mr. and Mrs. Wilson. The court reasoned that the settlement by its agent, Dr. Barrett, entitled WBSI "to a dollar for dollar pro tanto credit against Mrs. Wilson's verdict on the consortium claim," and that "Dr. Barrett's settlement effectively resolved all of the liability of Dr. Barrett and the vicarious liability of WBSI on that claim." Dr. Barrett's settlement entitled "Dr. Convit, as a separate joint tortfeasor, . . . to a 50% pro rata credit toward Mrs. Wilson's verdict on the consortium claim, which reduces the verdict against him on that claim from $2.5 million to $1.25 million."
With regard to the $1,550,000.00 in excess of the jury award that Dr. Barrett paid on Mrs. Wilson's loss of consortium claim, the trial court was aware of case law in this jurisdiction permitting plaintiff to retain the excess,*fn11 but the court decided, instead, to reduce "Mr. Wilson's verdict against WBSI . . . by $1,550,000.00, [while determining that] Dr. Convit [should] remain jointly and severally liable for the full amount." The trial court explained its decision as follows:
Here . . ., where the settlement amount far exceeds the verdict [on the loss of consortium claim], the liability of WBSI is vicarious only, and the settling Defendant and WBSI are considered a single tortfeasor for credit purposes, it seems fair that WBSI, rather than Plaintiffs, should receive the benefit of the "extra" money paid by Dr. Barrett. Even with the pro tanto credit to WBSI on the consortium claim, Mrs. Wilson still receives much more on that claim, between the settlement amount and the amount for which Dr. Convit remains liable after application of the pro rata credit, than the jury determined it to be worth [$5.3 million compared with the jury verdict of $2.5 million] . . . . This result seems especially appropriate in the circumstances of this case, given the dynamics that drove the settlement, the understanding of all parties that the money paid by Dr. Barrett represented a desire on his part to settle the claims of both Plaintiffs against him, and the practical reality that the settlement proceeds will undoubtedly benefit the family unit, including, of course, Mr. Wilson. In the absence of any authority to the contrary, this result strikes the court as the most reasonable way to allocate the settlement funds in the unusual circumstances of this case.
In support of its rationale, the trial court cited District of Columbia v. Washington Hosp. Ctr., 722 A.2d 332, 336 (D.C. 1998) (en banc).
Furthermore, the trial court addressed other contentions made by the defendants, which also had been advanced during trial. Both WBSI and Dr. Convit argued that Mrs. Wilson failed to establish that they "violated any applicable standard of care or that any such violation caused the injury suffered by Mr. Wilson." The trial court found that Mrs. Wilson's "experts were all well qualified to offer expert opinion testimony, they were all familiar with the pertinent national standards of care, and they all offered testimony, which the jury was free to accept or reject, that the respective doctors violated the standard of care and caused the injury of Mr. Wilson." With respect to the issue of causation, the trial court noted that "[t]he medical causation questions were extremely complex"; and "[e]ven if the opinions on when and where the infection started and the related causation issues tended to favor Defendants, Plaintiffs definitely had enough on their side to submit the issues to the jury and, in the court's opinion, the resulting verdict was not against the great weight of the evidence." As to WBSI's and Dr. Convit's argument that they were entitled to a new trial because the damages awarded were excessive, the trial court pointed to Mr. Wilson's need for "millions of dollars of medical and nursing care" due to the "devastating neurological injury, which has left him conscious but bedridden for the past six years and will leave him bedridden for the rest of his life." Moreover, the court "[could] not say that the verdict was impermissibly based on bias, prejudice, passion or consideration of any other improper factors."
The Settlement Agreement
WBSI argues that the trial court erred by failing to release it from suit after Mrs. Wilson and Dr. Barrett entered into their settlement agreement because "[t]he legal consequence of the Wilson-Barrett resolution was to extinguish all the Wilson claims against WBSI." WBSI claims that the common law unitary discharge rule commands its release; under that rule, the release of the agent, Dr. Barrett, from liability automatically releases the principal, WBSI, where the principal's liability is solely vicarious. Moreover, WBSI contends, "[a]lthough the dismissal was assertedly 'without prejudice,' it was nonetheless tantamount to dismissal 'with prejudice,' a final resolution of the Wilson claims against Dr. Barrett, because his dismissal . . . occurred after the statute of limitations on all those claims had expired." And, Mrs. Wilson's loss of consortium claim should also be dismissed WBSI asserts, because "the settlement agreement expressly contained her commitment to forego any claim against Dr. Barrett[,]" a commitment that "operated in law to extinguish her claim against WBSI."
Mrs. Wilson argues that "[t]here is nothing in the Agreement that expressly constitutes a release, or even implies that Mr. or Mrs. Wilson intended to release [Dr. Barrett]." According to Mrs. Wilson, a "dismissal [of Dr. Barrett] from the case 'without prejudice' was not a release." "[T]he effect of a 'without prejudice' dismissal is simply to excuse a defendant from the case"; "[i]t has no prejudicial impact on claims that a plaintiff might re-file against the dismissed defendant. Nor can it affect the plaintiff's existing claims against other defendants in the pending suit." Mrs. Wilson also contends that her settlement with Dr. Barrett did not exonerate WBSI of all liability because this court has never considered whether the unitary discharge rule applies in the agent-principal context and that the rule "should be rejected because it is incompatible with several District of Columbia policies, principles, and precedents."
We begin with the legal principles that will guide our analysis. "Vicarious liability . . . is merely a legal concept used to transfer liability from an agent to a principal[,]"*fn12 and includes the theory of respondeat superior as developed in agency law.*fn13 Under that theory, the responsibility of an agent for his own legally careless action is imputed to the principal.*fn14
Thus, we have said that "in cases involving derivative liability under the doctrine of respondeat superior, the master's liability is limited to that of the servant, the only active tortfeasor . . . ."*fn15
In determining whether the release of one joint tortfeasor releases all, this jurisdiction historically followed the common law rule (advocated here by WBSI) that "a release of one joint tortfeasor operated as a release of all joint tortfeasors."*fn16 That common law rule was "abandoned" in 1943, however, when the D.C. Circuit held that "'partial satisfaction taken in compromise and release of liability of one or some of the wrongdoers does not discharge the others.'"*fn17 We reaffirmed that holding in 1982 and 1987, emphasizing that:
[T]he effect of a release of a joint tortfeasor was ordinarily a question of fact dependent on two inquiries: (1) did the plaintiff intend to release all wrongdoers or only the particular party named in the release; and (2) did the amount settled for fully compensate the plaintiff or was it taken merely as the best obtainable compromise for the settler's liability. . . . Only where the terms of the release "leave no room for doubt" should these decisions be made as a matter of law.*fn18
Furthermore, we reiterated our "adhere[nce] to the doctrine that releases are contracts and should be construed according to established rules of contract interpretation."*fn19 In that regard, we look to "the parties' intentions as paramount" in interpreting the release,*fn20 and our review is de novo.*fn21 After considering our own case law and the law and legal principles followed in other jurisdictions concerning releases (including the "flat bar" rule, the specific identity or specific designation rule, and the intent rule), we concluded that our case law, beginning with McKenna, supra note 17, combined aspects of the "flat bar rule"*fn22 and the "intent rule";*fn23 consequently, we first "look at the language of the release and see if it unambiguously reflects the parties' intent to confer a benefit on [a party], thereby releasing him from any potential liability."*fn24 Second, if necessary, we turn to "extrinsic evidence of the parties' subjective intent."*fn25
While we no longer follow the common law rule with respect to the impact of a release of one joint tortfeasor on other joint tortfeasors, we have never held whether, under vicarious liability, the release of an agent releases the principal. However, in 1982 dicta, we suggested that the release of the agent would relieve the principal of liability.*fn26 We are called upon here to decide the difficult question of whether the settlement agreement between Mrs. Wilson and Dr. Barrett released both Dr. Barrett and WBSI from liability as to all the Wilson claims, as WBSI argues, or at least with respect to Mrs. Wilson's loss of consortium claim. Specifically, we must decide whether we should hold generally that a release of an agent also releases the principal from liability, or whether, like the trial judge, we should extend our earlier decision abandoning the common law rule relating to joint tortfeasor releases to the unique circumstances of this case, by holding that the release or discharge of Dr. Barrett from Mrs. Wilson's loss of consortium claim did not effect a release of the vicariously liable principal (WBSI) on either the negligence or the loss of consortium claim. We briefly focus on how other jurisdictions have handled the question of releases in the vicarious liability context. Between the late nineteenth and mid-twentieth century, a majority of courts adopted the common law rule that a valid release of an agent for tortious conduct releases the principal when the plaintiff's claim is based on vicarious liability.*fn27 The rationale articulated by the majority rested on different theories,*fn28 but the driving force behind the common law rule appeared to be that in the absence of the rule a plaintiff could receive more than one satisfaction for her injury.*fn29 A growing number of courts, however, have since abrogated the common law rule, holding that the modern rule pertaining to joint tortfeasors -- the release of one joint tortfeasor does not release all others unless the release so intended -- is equally applicable in the vicarious liability context.*fn30
Courts which have extended the modern rule to vicarious liability have decided that the plain language of the Uniform Contribution Among Tortfeasors Act (UCATA),*fn31 or a substantially similar state statute pertaining to the release of joint tortfeasors, encompasses vicariously liable parties.*fn32 They generally reason that "both the master and the servant are 'persons liable in tort for the same injury,'" and "'tort-feasors as used in [the UCATA] refers to those persons liable in tort.'"*fn33 Courts which have adopted this modern view through case law have adhered to a similar rationale and at least a few have explicitly stated that "[a]lthough the liability of the master and the servant is joint and several, the same principles apply to them in an action based solely on the negligence of the servant as would apply in actions against joint tort-feasors."*fn34 Some of those courts have also emphasized giving effect to the intentions of the parties executing the release.*fn35
Courts that have retained the common law rule have emphasized that abrogating the common law rule would require them to ignore the basic "distinctions between vicarious and joint liability."*fn36 As the Maryland Court of Special Appeals articulated in Condon, supra note 36:
Vicarious Liability is based on a relationship between the parties, irrespective of participation, either by act or omission, of the one vicariously liable, under which it has been determined as a matter of policy that one person should be liable for the act of the other. Its true basis is largely one of public or social policy under which it has been determined that, irrespective of fault, a party should be held to respond for the acts of another. More bluntly stated, "in hard fact, the reason for the employer's liability is the damages are taken from a deep pocket." The principal, having committed no tortious act, is not a "tortfeasor" as the term is commonly defined. According to Black's Law Dictionary (5th ed.), a tortfeasor is "a wrong-doer; one who commits or is guilty of a tort." (citations omitted).
Joint liability, by way of contrast, is based on the concept that all joint (or concurrent) tortfeasors are actually independently at fault for their own wrongful acts. It is because of their independent wrongdoing that under Md. Ann. Code art. 50, § 19, a plaintiff is permitted to bring an action against one joint tortfeasor after having released another joint tortfeasor from liability. Each tortfeasor faces liability for his or her own wrongdoing.*fn37
The Maryland intermediate appellate court believes that the common law rule is "logically compelling" because "[t]he release of an agent removes the only basis for imputing liability to the principal."*fn38
In contrast to the Maryland approach as articulated in Condon, the Appellate Division of the New Jersey Superior Court has extended the modern joint tortfeasor release rule to vicarious liability; and in doing so, that court has focused on the intent of the parties and the impact of the settlement agreement on satisfaction of plaintiff's claim:
The general rule in this jurisdiction is that a release of one tortfeasor will not release others who may also be liable to plaintiff for his harm unless the release is so intended or the plaintiff receives as a result thereof either full satisfaction or satisfaction intended as such. Breen v. Peck, 28 N.J. 351 (1958). . . . [W]e see no reason why the rule should not apply as well to the single act of negligence for which both the actual wrongdoer and his master or principal are each independently liable. The rationale of the rule is equally apposite whether the liability is actual or vicarious -- namely, that plaintiff is entitled to pursue all those who are independently liable to him for his harm until one full satisfaction is obtained.*fn39
In 1980, the New Jersey Supreme Court agreed with the Appellate Division's analysis in McFadden, supra note 30, stating in part:
Even when liability of one defendant is wholly vicarious, settlement with the primarily liable defendant may not necessarily release the other . . . . [T]he legal effect of a release on other parties should be determined by the intent of the parties to the release, with due consideration being given to whether the compensation paid was fully adequate. That eminently more just rule has been consistently followed.*fn40
The New York Court of Appeals has taken a similar approach by examining the intent of the parties:
Where a release has been given but the releasor reserves the right to proceed against other wrongdoers, we believe effect should be given to the intent of the parties as expressed by these reservations and allow suit against any defendant not a party to the release.*fn41
Of course WBSI insists that the trial court "erred in refusing to apply Maryland law to extinguish Mrs. Wilson's consortium claim"; WBSI also contends that the decision in Condon "squarely controls" this case. Mrs. Wilson voices strong opposition to WBSI's position, asserting that under Lamphier, supra note 18, "District of Columbia law controls because the [settlement a]greement was negotiated and executed in the District of Columbia, and related to litigation in the Superior Court of the District of Columbia"; and further, that the Condon decision "has little persuasive value here because it is an intermediate appellate court decision, not a pronouncement of Maryland's highest court."
The trial court spent substantial time on the settlement agreement issues prior to trial in this case, on April 21, 24, and 25, 2006. Its analysis and rulings are consistent with the extension of the modern rule (on releases in the joint liability context) to vicarious liability. The trial court also looked to considerations which we highlighted in Noonan, supra note 16, in interpreting settlement agreements and releases according to contract principles -- the intent of the parties, and the extent to which the settlement amount fully compensated the plaintiffs.
In informing the parties of his ruling, the trial judge noted the trend away from the common law toward the modern rule with respect to the effect of a release on a non-settling joint tortfeasor. He then examined case law, including Condon, Plath, Cartel, supra, and sections of RESTATEMENTS OF THE LAW (TORTS AND JUDGMENTS).*fn42 We are satisfied that the trial court correctly concluded that the parties to the settlement agreement did not intend to release WBSI from liability on either the negligence or loss of consortium claim. The specific, carefully crafted, unambiguous and plain wording of the settlement agreement supports this conclusion, as indicated by the following provisions: (1) "the parties . . . have reached a partial settlement only, and only as to those claims that are part of [Mrs. Wilson's] Claim against Dr. Barrett"; (2) the parties have "stipulate[d] and agree[d] that th[e] Agreement [was] not a release in any respect of Dr. Barrett's liability . . . for [Mr. Wilson's negligence] claim"; (3) Dr. Barrett's waiver of the statute of limitations for 18 months "for damages for [Mr. Wilson's] claim"; (4) the dismissal of Dr. Barrett, "without prejudice"; (5) "[t]he parties have discussed a potential verdict for all claims somewhere between $10,000,000.00 to $20,000,000.00"; (6) the parties' "agree[ment] that [Mrs. Wilson's] Claim for loss of consortium is significant, and could easily be valued at $5,000,000.00 by the jury"; and (7) the total settlement sum was $4,050,000.00.*fn43 We conclude that the trial court correctly construed the settlement agreement "according to established rules of contract interpretation," looking first to the language used in the settlement agreement to determine whether the words of the agreement released WBSI from liability.*fn44
Furthermore, in light of our survey of the law, we are persuaded that the trial court did not err in its legal conclusions concerning the effect of the settlement agreement on the vicarious liability of WBSI for both the negligence and loss of consortium claims.*fn45 Pertinent excerpts from the trial court's legal ruling follow:
[A]t least one way of stating the issue presented to me on the motions made by [WBSI], is the question whether the settlement of Mrs. Wilson's loss of consortium claim discharges the obligations of [WBSI] as to both that claim and Mr. Wilson's separate claim where the liability of [WBSI] is respondeat superior liability only. I have not found any cases in the District of Columbia that answer that question . . . .
[T]he common law rule, if one goes back far enough, is that the settlement and release with one of [the] joint tortfeasors discharges all joint tortfeasors. But as the law has developed, . . . many jurisdictions, if not most, have rejected the common law rules that deviate from the old common law rule . . . . [A]n intermediate [c]court of [a]ppeals in Maryland to whose law we look for common law in the absence of common law of our own . . . followed the common law rule, that the discharge of the agent operates to discharge the principal.
The highest court of Maryland has not adopted that view[,] . . . [a]nd I'm reasonably confident that the highest court in this jurisdiction wouldn't follow that rule either . . . .
After discussing the law in detail, as noted earlier, the trial court announced its conclusions, declaring, in part:
So as to the loss of consortium claim itself, there is no clear answer from this jurisdiction. But I would predict enough to be comfortable at this stage of the case holding [WBSI] in [the case] on Mrs. Wilson's loss of consortium claim . . . . So with respect to that claim, the motion for summary judgment is denied. The easier question, . . . for me at least, is the question of Mr. Wilson's claim. As to that claim, . . . there is absolutely nothing in the settlement with  Dr. Barrett of the loss of consortium claim that would operate to discharge, release, or in any other way satisfy the liability of [WBSI] if it is found that there was negligence by its agents that resulted in the injury to -- that proximately caused the injury to Mr. Wilson, and the principal should therefore be held liable . . . .
[I] don't think under the circumstances presented here . . . our Court of Appeals would hold that an agreement that expressly does not release any claims that Mr. Wilson has against Dr. Barrett, expressly reserves the right to pursue those claims for at least a period of another 18 months, expressly does not discharge or release those claims against Dr. Barrett's employer and expressly reserves the right to pursue those claims against the employer, operates as an adjudication on the merits of Mr. Wilson's claims against the employer, such that it would have res judicata effect and bar those claims forever . . . .
There is a strong public policy which permeates all of the law in this area in favor of settlement of disputes. And certainly the law would not want to go in a direction that would discourage parties like Dr. Barrett from settling his part of the dispute with the plaintiff.
Moreover, . . . there is a strong public policy in favor of compensating injured victims to the full extent of the law. Whether or not [WBSI] is ultimately found liable to Mr. Wilson, certainly the law promotes and encourages his ability to pursue any remedies he may have to seek compensation for those injuries from parties responsible . . . .
In short, upon review of the settlement agreement, our case law, and relevant case law from other jurisdictions, we agree with the trial court's analysis and conclusions before trial, as well as after trial in disposing of WBSI's motion for judgment as a matter of law, and we hold that under the circumstances of this case, the release of Dr. Barrett (agent) as to Mrs. Wilson's loss of consortium claim did not effect a release of the vicariously liable WBSI (principal) with respect to either the negligence or the loss of consortium claim.
Our holding fits within the confines of our case law which states "that releases are contracts and should be construed according to established rules of contract interpretation" where "the parties' intentions [are] paramount."*fn46 Moreover, it is consistent with our decision to abandon the common law rule relating to the effect of the release or discharge of a joint tortfeasor; and with the decision of other jurisdictions to abandon the common law rule governing the effect on a vicariously liable principal of the release or discharge of an agent. The concern that a plaintiff will receive double recovery if we abandon the common law rule relating to vicarious liability is tempered by the specific circumstances of this case and by the fact that WBSI, the vicariously liable principal, could and did obtain a pro tanto credit for the amount paid by Dr. Barrett, its employee, in his settlement with Mrs. Wilson. Moreover, if we were to hold that the release of Dr. Barrett effectively released WBSI as to all claims, including Mr. Wilson's negligence claim, Mrs. Wilson would receive less than full satisfaction for the catastrophic injuries suffered by Mr. Wilson.
Arguably, as WBSI suggests, adopting the modern rule could undermine "our longstanding policy of encouraging settlements"*fn47 because the servant might be less inclined to settle if the employer decided to seek indemnification against him. Such a result is uncertain for "indemnity is almost never sought against negligent servants."*fn48 In the event that the employer does seek indemnity, the employee may still be willing to settle to reduce the transactional costs of remaining in the lawsuit, i.e., attorneys fees and time spent attending court proceedings. Furthermore, we are unpersuaded by WBSI's argument that because "the statute of limitations had run, that act alone, in law, branded the dismissal as a dismissal with prejudice against WBSI," and "Dr. Barrett had no authority to waive . . . any of WBSI's defenses . . . ." WBSI loses sight of the fact that the Wilsons filed their action against WBSI on May 16, 2003, years before the April 25, 2006 settlement agreement between Mrs. Wilson and Dr. Barrett, and before the expiration of the statute of limitations. Dr. Barrett's waiver of the statute of limitations to permit the Wilsons to refile their action against him within eighteen months after the settlement agreement, did not disturb the Wilsons' ongoing claims against WBSI, and certainly did not operate as "a determination of liability."*fn49
The Negligence Issue
We next turn to Dr. Convit's argument that the trial court erred in denying his motion for judgment on Mr. Wilson's negligence claim. Specifically, Dr. Convit argues that the trial court erred in denying his motion for judgment because the Wilsons failed to present evidence that an act or omission by him "violated any standard of care or proximately caused Mr. Wilson's injuries."*fn50 In addition, Dr. Convit contends that even if reasonable jurors could conclude that negligence occurred, "judgment against [him] should be reversed because Dr. Barrett's failure to remove the shunt when Mr. Wilson was hospitalized the day after Dr. Convit's surgery constituted a superseding cause that relieved Dr. Convit of any liability."
Standard of Care
It is well established that "'[t]he plaintiff in a negligence action bears the burden of proof on three issues: the applicable standard of care, a deviation from that standard by the defendant, and a causal relationship between that deviation and the plaintiff's injury.'"*fn51
"With respect to the first requirement . . . '[a] plaintiff must put on expert testimony to establish what the standard of care is if the subject in question is so distinctly related to some science, profession or occupation as to be beyond the ken of the average layperson.'"*fn52 In Hawes v. Chua, 769 A.2d 797(D.C. 2001), based on our prior case law, we summarized "seven legal principles . . . important in assessing the sufficiency of national standard of care proof."*fn53
First, the standard of care focuses on the course of action that a reasonably prudent doctor with the defendant's specialty would have taken under the same or similar circumstances. Second, the course of action or treatment must be followed nationally. Third, the fact that District physicians follow a national standard of care is insufficient in and of itself to establish a national standard of care. Fourth, in demonstrating that a particular course of action or treatment is followed nationally, reference to a published standard is not required, but can be important. Fifth, discussion of the course of action or treatment with doctors outside this jurisdiction, at seminars or conventions, who agree with it; or reference to specific medical literature may be sufficient. Sixth, an expert's personal opinion does not constitute a statement of the national standard of care; thus a statement only of what the expert would do under similar circumstances is inadequate. Seventh, national standard of care testimony may not be based upon mere speculation or conjecture.*fn54
In addition, we have said that "an expert's educational and professional background is not sufficient to demonstrate that he is familiar with the national standard of care."*fn55 Thus,
"[w]here the expert makes 'no attempt to link his testimony to any certification process, current literature, conference or discussion with other knowledgeable professionals,' there is no 'basis for his discussion of the national standard of care.'"*fn56 "Our primary concern is whether it is reasonable to infer from [the] testimony that such a standard is nationally recognized."*fn57 "[A] decision that the expert testimony presented by the plaintiff was (or was not) sufficient to meet her burden of proof is a question ultimately of law that we decide de novo."*fn58
Upon review of the record, we cannot agree with Dr. Convit that Mrs. Wilson presented insufficient evidence to establish that Dr. Convit deviated from the national standard of care by performing the flap procedure on Mr. Wilson. She presented two experts who testified about the national standard of care -- plastic and reconstructive surgery expert Dr. Breitbart, and infectious disease expert Dr. Clayton Moravec. Dr. Breitbart testified that Dr. Convit deviated from the national standard of care. The national standard of care required Dr. Convit to remove the shunt before he closed the wound because the shunt had been exposed to air and contaminated, and since he negligently failed to remove the shunt, he was obliged to inform Dr. Barrett that the shunt had been exposed to air but had not been removed. Dr. Breitbart testified that the national standard of care required Dr. Convit to recognize that the shunt was contaminated and had to be removed unless Dr. Barrett determined that neurological circumstances in this case required that it remain in place.*fn59 Dr. Moravec concurred, stating that Dr. Convit breached the standard of care by flapping the VP shunt, whether the device was infected or contaminated. He explained, "I don't know of an infectious disease doctor that wouldn't recommend a shunt that is exposed to the air . . . come out."
Dr. Breitbart testified about his private general surgery practice; board certification in the fields of general surgery and plastic and reconstructive surgery; membership in national organizations such as the American Society of Plastic Surgeons and American Society of Maxillofacial Surgeons; attendance at nationwide conferences of plastic surgeons where he talks about how plastic surgery is performed in different states; forty or fifty publications, including book chapters and articles in plastic surgery journals and a chapter on implant materials in one of the primary plastic surgery textbooks; and how he regularly keeps up with the literature in the field of plastic and reconstructive surgery. When asked "whether [Dr.] Convit's actions [on May 18th] . . . deviated from, the standard of care of a reasonably prudent plastic surgeon on a national standard of care basis" Dr. Breitbart unequivocally responded "Yes, that was a deviation from the standard of care." Dr. Breitbart did not "state only what he would do under similar circumstances"*fn60 or that his testimony was based on conversation he had with "local fellow surgeons."*fn61 The fact that Dr. Breitbart has not been involved in the specific procedure of covering flaps does not make his testimony on the standard of care insufficient.*fn62 As Dr. Convit's plastic and reconstructive surgery expert, Michael Olding, testified, "[i]n terms of the principles that one applies to treat an exposed foreign body of any type, the principles are the same." Dr. Convit agreed. Similarly, our case law does not require Dr. Breitbart to reference the specific source from which he obtained the national standard of care.*fn63
Likewise, Dr. Convit's claim that Dr. Moravec failed to establish that he deviated from the national standard of care because "there is no evidence upon which a reasonable jury could conclude that the shunt which Dr. Convit covered was infected or that Mr. Wilson had any infection at that time" is misplaced. Dr. Moravec testified that Dr. Convit deviated from the standard of care even if at the time he performed the flap procedure Mr. Wilson's exposed shunt was only contaminated. Dr. Peerless, Dr. Moravec, and Dr. Williams all testified, that at the time Dr. Convit performed the flap procedure, the area around Mr. Wilson's shunt was at least contaminated with bacteria or fungi.*fn64 In sum, Mrs. Wilson introduced sufficient evidence to demonstrate that Dr. Convit breached a national standard of care.
Dr. Convit also contends that he was not the proximate cause of Mr. Wilson's neurological injuries, and that Dr. Barrett's failure to remove Mr. Wilson's right shunt when Mr. Wilson was hospitalized on May 19 was a superseding cause that relieved Dr. Convit of liability.*fn65 Mrs. Wilson maintains that "[Dr.] Convit's superseding cause defense . . . failed because the jury understood that [Dr.] Barrett's failure to remove the shunt on May 19 was reasonably forseeable to [Dr.] Convit, and not the type of unforseeable, 'highly extraordinary' event that constitutes a superseding cause as a matter of law"; and that "the evidence showed that by the time [Dr.] Barrett saw Mr. Wilson on May 19, it was too late to prevent the permanent injuries caused by [Dr.] Convit."
"To establish proximate cause, the plaintiff must present evidence from which a reasonable juror could find that there was a direct and substantial causal relationship between the defendant's breach of the standard of care and the plaintiff's injuries and that the injuries were foreseeable."*fn66 Moreover, "[p]roximate cause has been defined as 'that cause which, in natural and continual sequence, unbroken by any efficient intervening cause, produces the injury, and without which the result would not have occurred.'"*fn67 "Superseding cause is a subset of the inquiry into proximate cause."*fn68 "In essence, it is a concept that the action of a subsequent tortfeasor may be a 'superseding cause' which breaks the chain of causation and relieves the first tortfeasor of liability to the injured party."*fn69 Furthermore, "proximate cause . . . is ordinarily a question of fact for the jury[; and] [i]t is only in cases where it is clear that reasonable [people] could draw but one conclusion from the facts alleged that negligence and proximate cause become questions of law. These cases have been said to be exceptional."*fn70
The record reflects that the evidence adduced at trial supported a finding that Dr. Convit's acts during his surgery constituted a proximate cause of Mr. Wilson's injury, and that the failure of Dr. Barrett to remove the right shunt on May 19 was not a superseding cause of Mr. Wilson's injuries.*fn71 The undisputed evidence at trial established that the exposed wound over Mr. Wilson's right shunt was contaminated on May 18 when Dr. Convit performed the flap procedure. According to Dr. Peerless, Dr. Convit's flap procedure "broke down the local barriers that the body had built up . . . and precipitated the spread of . . . both bacteria and fungi from the scalp and the tissues on the scalp into the brain and onto the surface of the brain." Dr. Williams further explained:
The purpose of the skin, in this case the scalp, is to protect the body from things on the outside and to keep normal things on the inside. And one of the ways that an infection can occur is if that physical barrier . . . is disrupted. . . . And if this is disrupted, then those bacteria come onto the surface of whatever is down there. In this case the shunt. . . . . . . . [T]he procedure to cover the shunt involved moving some of the skin . . . over it. . . . And for whatever extent that the body is holding back this infection, that's been altered by the surgery.
Dr. Williams stated that as a result of the surgery, "the bacteria and everything that was on the surface . . . continue[d] to spread along the shunt and eventually down the catheter." The bacteria then spread past the dura, into the subarachnoid space and then finally reached the surface of the brain. Dr. Williams testified that samples of spinal fluid taken from the left shunt did not show signs of infection because "[a]ll the infection [was] out . . . in the subarachnoid spinal fluid." The fluid that was in the obstructed catheter was "stagnant" because the "shunt [was] blocked." Therefore, none of the taps on the left were ever getting a sample of fluid from the right shunt. Dr. Williams and Dr. Peerless both concluded that Dr. Convit most likely manipulated Mr. Wilson's shunt when he performed the flap procedure which caused the obstruction in the catheter.
Notably, Dr. Convit did not present an expert to establish that the failure of Dr. Barrett to remove the right shunt broke the sequence of Dr. Convit's negligence and produced Mr. Wilson's injuries. Rather, he depends upon the testimony of the Wilsons' experts, especially Dr. Peerless and Dr. Moravec, in constructing his superseding cause argument.
Upon review of the record, we see no reason to disturb the jury's decision that "plaintiffs prove[d] by a preponderance of the evidence that Dr. Convit's violation of the national standard of care was a proximate cause of Mr. Wilson's injuries and damages." As we have said, "proximate cause . . . is ordinarily a question of fact for the jury," and "[s]uperseding cause is a subset of the inquiry into proximate cause."*fn72 Moreover, we cannot say that this case is one of those "exceptional" cases "where it is clear that reasonable [people] could draw but one conclusion from the facts alleged" concerning the proximate or alleged superseding cause of Mr. Wilson's injuries. Hence, we cannot say as a matter of law that Dr. Convit could not have foreseen that Dr. Barrett would not remove the right shunt on May 19, nor can we state that Dr. Barrett's negligent failure to discover and remove Mr. Wilson's infected right shunt on May 19 was a superseding cause of Mr. Wilson's injuries and that, consequently, Dr. Convit's negligence was not a proximate cause of those injuries. In short, given the evidence presented to the jury, we are satisfied that a reasonable jury could conclude that Dr. Convit's flap procedure was a proximate cause of Mr. Wilson's neurological injuries.*fn73
The Judgment Credit Issue
Finally, all parties contend that the trial court erred in calculating the judgment credit to which they are entitled. Both WBSI and Dr. Convit essentially argue that due to the settlement agreement between Dr. Barrett and Mrs. Wilson, they are entitled to a 50% pro rata credit and reduction of the total jury verdict on both the negligence and loss of consortium claims.*fn74 Mrs. Wilson asserts that the trial court erred by "reduc[ing] the jury's verdict for Mr. Wilson against WBSI on Count I [the negligence claim], based on Mrs. Wilson's settlement with [Dr.] Barrett on Court II [the consortium claim]." She also contends that the trial court erred by giving "WBSI a pro tanto credit" and Dr. Convit "a 50% pro rata credit" on Count II, and that Dr. Barrett's "settlement with Mrs. Wilson entitled WBSI and [Dr.] Convit to only a 33% pro rata credit against the verdict on Count II."
Where the plaintiff settles with a joint tortfeasor, the non-settling tortfeasors are entitled to a credit. "The question of how to credit the judgment entered upon a jury verdict against a non-settling defendant with the proceeds a settling defendant paid to the plaintiff is purely a question of law, which this court reviews de novo."*fn75
In District of Columbia v. Shannon, 696 A.2d 1359 (D.C. 1997), we recounted the origin of the judgment credit concept in this jurisdiction:
In Martello v. Hawley, 112 U.S. App. D.C. 129, 300 F.2d 721 (1962), the United States Court of Appeals for the District of Columbia Circuit held, in an opinion binding on us, that where a plaintiff settles with one joint tortfeasor whose liability is judicially established, a non-settling tortfeasor is entitled to a pro rata reduction of a jury verdict for the plaintiff. See id. at 132; 300 F.2d at 724. The court reasoned that, because the remaining defendants could have sought contribution from the settling defendant had the settlor remained in the case, no remaining defendant should be forced to pay more than it otherwise would have paid if the settling defendant had not settled. See id.at 131; 300 F.2d at 723.*fn76
In Washington Hosp. Ctr., supra, we summarized the judgment credit concept as it has developed in this jurisdiction:
In this jurisdiction, where there is contribution among joint tortfeasors, damages are apportioned equally among them. R.& G. Orthopedic Appliances [v. Curtin],  596 A.2d [530,] 544 [(D.C. 1991] (citing Early Settlers [Ins. Co. v. Schweid], 221 A.2d [920,] 923 [D.C. 1966]). When one party settles with the injured party, and the claim proceeds to verdict against the non-settling party, "where contribution would otherwise be called for, a credit is applied against the amount of any judgment . . . equal to the share of the judgment that should be borne by the settling tortfeasor." Lamphier, supra [note 18], 524 A.2d at 733. If the settling tortfeasor is judicially determined to be a joint tortfeasor, the non-settling defendant is entitled to a pro rata credit against the verdict. Berg, supra [note 11], 673 A.2d at 1248 (citing Martello, supra, 112 U.S. App. D.C. at 132, 300 F.2d at 724). "When plaintiff has settled with a party whose culpability has not been determined, or with a party whom the finder of fact has found not liable, the court awards the non-settling defendant a credit against the verdict in the amount of the settlement, dollar-for-dollar (pro tanto), 673 A.2d at 1248-49 (citing Snowden v. District of Columbia Transit Sys., Inc., 147 U.S. App. D.C. 204, 205-06, 454 F.2d 1047, 1048-49 (1971)). In either case, the risk of loss is on the injured party who has sold a portion of his or her claim.*fn77
Thus, as we have said, a Martello (pro rata) credit is warranted when two requirements are met: (1) the non-settling defendant asserts "the settling defendants' negligence and [his] right to contribution before the jury returns a verdict"; and (2) the settling defendant is found jointly liable for the harm caused to the plaintiff.*fn78 The purpose behind this policy is to prevent a settlement from defeating "the non-settling joint tortfeasor's right to recover a full measure of contribution which otherwise would not be vindicated without undermining the policy of according protective finality to out-of-court settlements by tort-feasors."*fn79 Conversely, if "the plaintiff has settled with a party whose culpability has not been determined or with a party whom the finder of fact has found not liable, the court awards the non-settling defendant a credit against the verdict in the amount of the settlement, dollar-for-dollar (pro tanto)."*fn80 "The rationale behind the pro tanto credit . . . is to ensure that the plaintiff receives no more than the loss actually suffered for her claim."*fn81
We have not previously had a case requiring the calculation of a judgment credit where an agent entered into a settlement agreement with a plaintiff but the vicariously liable employer did not, and where the jury returned a verdict against the vicariously liable employer, as well as another party. Here, when the Wilsons filed their complaint, there were two potential joint tortfeasors, (1) Dr. Barrett/WBSI under a theory of respondeat superior and (2) Dr. Convit.*fn82 Both WBSI and Dr. Convit declined to settle, leaving WBSI and Dr. Convit as potential joint tortfeasors. Furthermore, we have already concluded that the settlement agreement between Dr. Barrett and Mrs. Wilson, and the $4,050,000.00 settlement sum applied only to the loss of consortium claim.
The trial court ruled, and we agree, that WBSI could not be held liable to pay a compensatory-damages amount already satisfied by its agent, Dr. Barrett (who has never been judicially determined to be a tortfeasor), on the loss of consortium claim.*fn83 Thus, the trial court correctly applied a pro tanto credit of $4,050,000.00 to the $2,500,000.00 judgment against WBSI on the loss of consortium claim. The settlement agreement, then, effectively relieved WBSI of all obligation to pay the damages award applicable to the loss of consortium claim. The trial court also correctly decided that Dr. Convit, as an adjudicated joint tortfeasor, was liable for only 50% of Mrs. Wilson's loss of consortium judgment; hence, he was entitled to a $1,250,000.00 pro rata reduction of the jury award for Mrs. Wilson's claim.
Mrs. Wilson's argument that the trial court erred by giving WBSI a pro tanto credit and Dr. Convit a 50% pro rata credit, rather than a 33% pro rata credit each to WBSI and Dr. Convit, is incorrect. Similar to this court in Chidel, supra note 82, in St. Paul Fire & Marine Ins. Co. v. MAG Mutual Ins. Co., 433 S.E.2d 112 (Ga. Ct. App. 1993), the trial court declared that contribution shares of the parties should be one-half for one joint tortfeasor (Piedmont Hospital Inc.) and a combined one-half for the other joint tortfeasor (Dr. John C. Garrett) and his derivatively liable employer (Resurgens, P.C.). On appeal, the insurance carrier of Piedmont Hospital Inc. argued, as Mrs. Wilson does here, "that the correct measure of contribution among joint tortfeasors should be determined by dividing the judgment or settlement amount by the number of joint tortfeasors without regard to the character of each tortfeasor's negligence and that, therefore, in this case each defendant should pay one-third of the total amount paid in settlement to the plaintiff."*fn84 The Court of Appeals of Georgia, however, agreed with the trial court, explaining that "[w]here one or more of such defendants is liable solely on the basis of negligence imputed to him by virtue of his relationship with one of the other tortfeasors, the one guilty of negligence and the one to whom that negligence is imputed are to be treated as one party for the purpose of measuring the pro rata share of contribution due to the others."*fn85 In sum, we agree with the trial court's calculation of the judgment credits with respect to the loss of consortium claim.
We also reject WBSI's and Dr. Convit's argument that they are each entitled to a 50% pro rata reduction on Mr. Wilson's negligence claim. As we previously noted, a 50% pro rata reduction is warranted only when a joint tortfeasor settles his claim with the plaintiff.*fn86
The settlement agreement, which was between Mrs. Wilson and Dr. Barrett only, does not, as the trial court ascertained, manifest Mrs. Wilson's intent to settle the negligence claim (and, of course, could not signify WBSI's intent to settle). The settlement agreement explicitly states "this Agreement in no way releases the defendant [WBSI] from any part of [Mr. Wilson's] Claims against WBSI for Barrett's actions . . . ." That Mrs. Wilson settled her loss of consortium claim is of no moment. "A loss of consortium claim stands 'separate and independent' from a negligence claim and a 'judgment against [a spouse claiming negligence] is not a bar to an action by [the spouse claiming loss of consortium].'"*fn87
Furthermore, because the loss of consortium claim, the only claim to which the settlement agreement applies, is independent of the negligence claim, we conclude that the trial court erred in applying the $1.55 million excess sum paid by Dr. Barrett to WBSI's liability on the negligence claim. As we have said previously: "It seems to us that a plaintiff's good fortune in striking a favorable bargain with one defendant gives other defendants no claim to pay less than their . . . share of the total loss."*fn88
Accordingly, for the foregoing reasons, we reverse the trial court's reduction of WBSI's liability for the award of damages on Mr. Wilson's negligence claim, but we affirm its judgment in all other respects.