"DEATH OF MICHAEL COLOMBINI - A SENTINEL EVENT IN THE HISTORY OF RADIOLOGY"

 

The death of Michael Colombini on July 29, 2001, is regarded as the most significant "sentinel event" in the history of radiology. It fundamentally changed how MRI safety is managed worldwide.

Incident Overview

Victim: Michael Colombini, a 6-year-old boy from Croton-on-Hudson, NY.

Location: Westchester Medical Center, Valhalla, New York.

Context: Michael was undergoing a follow-up MRI after successful surgery to remove a benign brain tumor.

How and Why It Happened

While Michael was sedated inside the MRI bore, his oxygen saturation levels began to drop. The anesthesiologist, Dr. Jian Hou, noticed the drop and attempted to use the room's built-in piped-in oxygen system. However, the system failed to deliver gas.

In the ensuing panic, the anesthesiologist or a nurse (accounts varied during the trial) called for a portable oxygen tank. A nurse, who was not a regular member of the MRI staff, handed a 10-pound steel (ferrous) oxygen cylinder to the anesthesiologist at the door. As the tank entered the room, the "always-on" magnetic field (30,000 times stronger than Earth’s gravity) yanked it from the doctor's hands. It became a "missile," flying into the machine where it struck Michael in the head, fracturing his skull.

Investigations and Findings

Investigations by the New York State Health Department and independent safety experts revealed a "perfect storm" of systemic failures:

Mechanical Failure: The suite's wall-mounted oxygen supply was empty or malfunctioning.

Training Lapses: The staff involved had not been properly trained on the "missile effect" or the fact that the magnet is always on, even when the machine isn't scanning.

Communication Breakdown: There was no clear chain of command between the hospital staff and the private company (University Imaging Medical Corp.) contracted to run the MRI suite.

Prior Incidents: It was discovered that at least two other "near-miss" projectile incidents (involving a wheelchair and other oxygen tanks) had occurred at the same facility in the months prior but were never reported.

Arrests and Verdicts

Criminal Charges: No one was criminally charged. The district attorney's office reviewed the case but determined it did not meet the threshold for "depraved indifference" or criminal negligence.

Civil Lawsuit: The Colombini family filed a $20 million wrongful death lawsuit against the hospital, the MRI manufacturer (GE), and several medical professionals.

The Settlement: In 2010, after nine years of litigation, the case settled for $2.9 million. This was considered a high amount for a child's death in New York at the time, partly because the family’s lawyers successfully argued for "punitive damages" due to the hospital's "wanton" disregard for safety.

Aftermath and Legacy

The tragedy led to the creation of the ACR (American College of Radiology) White Paper on MR Safety, which established the "Four Zone" system used in hospitals today:

Zone 1: General public areas.

Zone 2: Patient greeting/screening.

Zone 3: Control room (restricted access).

Zone 4: The magnet room (strictly controlled, no ferrous metal allowed).

Current Status

The case is legally closed, but Michael’s memory is preserved through MRI Safety Week, held annually during the last full week of July (the anniversary of his death). Despite this landmark case, "missile" incidents still occur globally—most recently, a similar fatal accident occurred in South Korea in 2021 and another in India in 2018—highlighting the ongoing need for vigilance.

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