Medical radiation: A lifesaving tool turned deadly

Last Updated 26 January 2010, 16:34 IST
Medical radiation: A lifesaving tool turned deadly

As Scott Jerome-Parks lay dying, he clung to this wish: that his fatal radiation overdose — which left him deaf, struggling to see, unable to swallow, burned, with his teeth falling out, with ulcers in his mouth and throat, nauseated, in severe pain and finally unable to breathe — be studied and talked about publicly so that others might not have to live his nightmare.

Sensing death was near, Jerome-Parks summoned his family for a final Christmas. His friends sent two buckets of sand from the beach where they had played as children so he could touch it, feel it and remember better days.
Jerome-Parks died several weeks later in 2007. He was 43.
A New York City hospital treating him for tongue cancer had failed to detect a computer error that directed a linear accelerator to blast his brain stem and neck with errant beams of radiation. Not once, but on three consecutive days.
Soon after the accident, at St Vincent’s Hospital in Manhattan, state health officials cautioned hospitals to be extra careful with linear accelerators, machines that generate beams of high-energy radiation.

But on the day of the warning, at nearby University Hospital in Brooklyn, a 32-year-old breast cancer patient named Alexandra Jn-Charles absorbed the first of 27 days of radiation overdoses, each three times the prescribed amount. A linear accelerator with a missing filter would burn a hole in her chest, leaving a gaping wound so painful that this mother of two young children considered suicide.
Jn-Charles and Jerome-Parks died a month apart. Both experienced the wonders and the brutality of radiation. It helped diagnose and treat their disease. It also inflicted unspeakable pain.

Yet while Jerome-Parks had hoped that others might learn from his misfortune, the details of his case — and Jn-Charles’ — have until now been shielded from public view by the government, doctors and the hospital.
Americans today receive far more medical radiation than ever before. The average lifetime dose of diagnostic radiation has increased sevenfold since 1980, and more than half of all cancer patients receive radiation therapy. Without a doubt, radiation saves countless lives, and serious accidents are rare.
But patients often know little about the harm that can result when safety rules are violated and ever more powerful and technologically complex machines go awry.
To better understand those risks, ‘The New York Times’ examined thousands of pages of public and private records and interviewed physicians, medical physicists, researchers and government regulators.

‘The Times’ found that while this new technology allows doctors to more accurately attack tumours and reduce certain mistakes, its complexity has created new avenues for error — through software flaws, faulty programming, poor safety procedures or inadequate staffing and training. When those errors occur, they can be crippling.
“Linear accelerators and treatment planning are enormously more complex than 20 years ago,” said Dr Howard I Amols, chief of clinical physics at Memorial Sloan-Kettering Cancer Centre in New York. But hospitals, he said, are often too trusting of the new computer systems and software, relying on them as if they had been tested over time, when in fact they have not.

Regulators and researchers can only guess how often radiotherapy accidents occur. With no single agency overseeing medical radiation, there is no central clearinghouse of cases.
Accidents are chronically underreported, records show, and some states do not require that they be reported at all.
In June, ‘The Times’ reported that a Philadelphia hospital gave the wrong radiation dose to more than 90 patients with prostate cancer — and then kept quiet about it. In 2005, a Florida hospital disclosed that 77 brain cancer patients had received 50 per cent more radiation than prescribed because one of the most powerful — and supposedly precise — linear accelerators had been programmed incorrectly for nearly a year.
Dr John J Feldmeier, a radiation oncologist at the University of Toledo and a leading authority on the treatment of radiation injuries, estimates that one in 20 patients will suffer injuries.

Most are normal complications from radiation, not mistakes, Feldmeier said. But in some cases the line between the two is uncertain and a source of continuing debate.
“My suspicion is that maybe half of the accidents we don’t know about,” said Dr Fred A Mettler Jr, who has investigated radiation accidents around the world and has written books on medical radiation.
Identifying radiation injuries can be difficult. Organ damage and radiation-induced cancer might not surface for years or decades, while underdosing is difficult to detect because there is no injury. For these reasons, radiation mishaps seldom result in lawsuits, a barometer of potential problems within an industry.

In 2009, the nation’s largest wound care company treated 3,000 radiation injuries, most of them serious enough to require treatment in hyperbaric oxygen chambers, which use pure, pressurised oxygen to promote healing, said Jeff Nelson, president and chief executive of the company, Diversified Clinical Services.

While the worst accidents can be devastating, most radiation therapy “is very good”, Mettler said. “And while there are accidents, you wouldn’t want to scare people to death where they don’t get needed radiation therapy.” Because New York state is a leader in monitoring radiotherapy and collecting data about errors, ‘The Times’ decided to examine patterns of accidents there and spent months obtaining and analysing records.
Even though many accident details are confidential under state law, the records described 621 mistakes from 2001 to 2008. While most were minor, causing no immediate injury, they nonetheless illuminate underlying problems.

‘The Times’ found that on 133 occasions, devices used to shape or modulate radiation beams — contributing factors in the injuries to Jerome-Parks and Jn-Charles — were left out, wrongly positioned or otherwise misused. On 284 occasions, radiation missed all or part of its intended target or treated the wrong body part entirely. In one case, radioactive seeds intended for a man’s cancerous prostate were instead implanted in the base of his penis.

Another patient with stomach cancer was treated for prostate cancer. Fifty patients received radiation intended for someone else, including one brain cancer patient who received radiation intended for breast cancer.
New York health officials became so alarmed about mistakes and the underreporting of accidents that they issued a special alert in December 2004, asking hospitals to be more vigilant.
The New York Times

(Published 26 January 2010, 16:32 IST)

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