Newsletter from the Standards and Ethics Committee for the Eastern Cardiothoracic Surgical Society
by Darryl S. Weiman, M.D., J.D. • June 2026
Most of us know of the Libby Zion case and the far-reaching effects it had on resident duty hours and supervision requirements, but few know about what happened at the medical malpractice trial Zion v. New York Hospital.[1] First, some background information for our younger colleagues.
In March 1984, Libby Zion was a freshman at Bennington College who was working at home during the school’s winter-work term. Her father, Sidney Zion, was a well-connected attorney who had been an Assistant U.S. Attorney in New Jersey before becoming a reporter for the New York Times. He was a graduate of Yale Law School. He also worked as a columnist for the New York Post and the Daily News. Knowing the father’s political clout is important in understanding events after Libby’s death.
On Sunday night, March 4th, Libby was home recovering from a tooth extraction. She had been running a fever which would spike up to 106 degrees Fahrenheit, but it had come down and she said she was feeling better. At about 9 PM Libby’s brother became concerned because her fever had again spiked and she was agitated. The parents came and when they saw her, they called Libby’s pediatrician but could not reach him. Mr. Zion then called his doctor, Raymond Sherman, who had treated Libby in the past. Dr. Sherman advised the Zions to take Libby to New York Hospital, and he would let the emergency room know that she was coming.
The emergency room records show that Libby told them that she was on Nardil[2], for depression, and erythromycin for the tooth extraction. She denied any recent use of any illicit drugs. This became important later as the defense showed that she had used cocaine which they tried to show was a factor in the death.
The ER physician turned her care over to a second-year resident, Dr. Gregg Stone. Dr. Stone did his own history and physical examination. His initial diagnosis was a viral infection and some “hysterical symptoms.” He called Dr. Sherman at home, and they agreed that Libby should be admitted. She was sent to a floor called Payson 5 which was not an intensive care unit.
Dr. Stone ordered Demerol because Libby was shaking, and he, Dr. Stone, then left the hospital to get some sleep.
A first-year resident, Dr. Luise Weinstein, was now responsible for Libby but she was mainly working on Payson 3, two floors away. Dr. Weinstein later ordered Haldol because Libbly’s agitation was getting worse and the fever was not coming down. Weinstein also ordered arm and leg restraints. Dr. Weinstein did not come and examine Libby despite the nurse’s request.
The nurses checked at 6 AM and found the temperature had risen to 107 degrees and they started cooling measures, but Libby suddenly had a cardiac arrest. Despite all efforts, Libby Zion died around 7:30 AM March 25, 1984.
Sidney Zion was obviously upset, and he asked Manhattan District Attorney Robert Morgenthau to do a criminal investigation. Mr. Zion pushed to have all the doctors involved in Libby’s care to be charged with criminal negligence. In 1986, the results of the investigation were presented to a grand jury, but the grand jury refused to indict any of the doctors.
Despite the lack of indictment, Mr., Morgenthau made several public statements relating to the resident duty hours without sleep and the lack of attending supervision. Subsequent investigations, and there were many, concluded that Libby probably died from the interaction of Demerol with the Nardil resulting in serotonin syndrome[3]. Serotonin syndrome was not well known in the 1980’s so it remains unclear that increased supervision or more rested residents would have made a difference in this case.
The political reaction to the case led to the formation of the Bell Commission in New York. The Commission went on to make several recommendations as to graduate medical education and these changes were implemented in all 152 hospitals in New York state by July 1989. Despite arguments, several other states followed with similar “Libby Zion” rules. The ACGME came fully on board with the duty hour restrictions in 2003.
Sydney Zion was instrumental in the push for duty hour and supervision reforms. He also initiated a negligence cause of action against the physicians involved and New York Hospital.
The duty hour restrictions and the supervision requirements emanating from the Libby Zion case are still an area of contention and many articles have been written both pro and con; but what happened in the civil case that was brought for medical malpractice?
In 1985, the Zions brought a negligence case against Dr. Sherman, Dr. Weinstein, two other residents and New York Hospital. Ten years later, the case finally made it to trial. Reading about the case decision in Zion v. New York Hospital is fascinating as both plaintiff and defense teams were represented by excellent attorneys.
Plaintiffs argued that there were two fatal errors committed by the defendants that led to Libby’s death. The first error was giving Demerol to the patient that they knew was also taking Nardil. The second error alleged was not placing Libby in an Intensive Care Unit where she would be better monitored.
The defendant’s strategy was to focus on Libby’s cocaine use which they argued was the main initiator of serotonin syndrome with hyperthermia. A great deal of testimony revolved around testing for cocaine use; radioimmunoassay showed trace amounts, but gas chromatography did not show any amount. Even the blood taken postmortem had discrepancies as to cocaine presence and the lawyers had a field day with this. Also, the urine samples did not show any cocaine.
The trial lasted almost three months. The battle of the experts was detailed and revolved around the drug interaction, sleep deprivation, Libby’s failure to let the physicians know that she had been taking cocaine—although it was never proven that the illicit drug use was recent, the issue of whether an ICU environment would have made a difference, and the lack of attending supervision. The tests ordered, the physical exam findings, and the symptoms and signs were also exhaustively litigated but I don’t need to give you the details in this newsletter.
After closing arguments, the jury deliberated for four days. In this case, only five of the six jurors had to agree to reach a verdict. Remember, each state has its own rules.
First, the jury found that Dr. Sherman was not negligent. They decided that he was not required to come into the hospital in the middle of the night to see Libby. They also ruled that the failure to put Libby in the ICU was not negligent. The jury also ruled that Dr. Leonard, the emergency room resident was not negligent.
The jury also ruled that Dr. Stone, the second year resident, did not breach the standard of care by failing to order a neurologic exam, obtain arterial blood gases, start antibiotics, among other things. They also found that Dr. Weinstein was not negligent on most of the allegations brought against her.
However, the jury did find that doctors Sherman, Stone, and Weinstein were negligent by giving the Demerol even though they knew that Libby was taking Nardil. The jury awarded the Plaintiffs $1 for wrongful death (a mere symbolic award) and the Zions’ $750,000 for pain and suffering. The monetary award was cut in half to $375,000 because they found that Libby was 50% at fault for not telling the physicians about the cocaine use.
The jury also found that New York Hospital and its system of resident supervision was not negligent. These events predated the PATH audits[4] that I wrote about in a previous newsletter. These PATH audits changed the rules of resident supervision in a major way.
The final amount of damages was sealed. It is not uncommon for parties to decide on a different amount than decided by the court, especially when the losing party agrees to no longer appeal the verdict.
As an aside, I once had dinner with Dr. Bell and I asked him how the commission came to decide that 80 hours was the correct number. He shrugged his shoulders and said, “it just seemed right.”[5]
So now you know the rest of the story as it pertains to the medical malpractice case of Zion v. New York Hospital.
[1] Zion v. N.Y. Hosp., 590 N.Y.S.2d 188 (N.Y. App. Div. 1992).
[2] Nardil (phenelzine) is a monoamine oxidase inhibitor (MAOI) used to treat atypical, treatment resistant depression.
[3] Serotonin syndrome (serotonin toxicity?) can cause confusion, rapid heart rate, hypertension, and hyperthermia.
[4] The PATH (Physicians at Teaching Hospitals) audits did not really get started until 1996. The audits were meant to enforce the Medicare guidelines for the teaching attending to be physically present when a resident did a billable service.
[5] Private communication with Dr. Bertrand Bell the head of the Bell Commission.