And yet many people do. Exactly how many, we can’t say, because there is no national registry for injuries or deaths caused by medical errors. Over a decade ago, in the best study of its kind, the Institute of Medicine estimated that there were 44,000 to 98,000 deaths per year because of preventable errors in the American health system. For every death there are likely to be at least 10 serious injuries, so we can assume that roughly a million patients are seriously injured each year.

Despite calls to action by patient advocates and the adoption of safety programs, there is no sign that the numbers of errors, injuries and deaths have improved. Why? Because those responsible for the delivery of health care have been unable to change how they do things.

They could help themselves by embracing the lessons of great manufacturing companies to improve quality and efficiency. Automatic alarm systems and shut-off switches can be designed to make it nearly impossible for caregivers to do the wrong thing. Checklists and specific protocols based on best practices for each procedure can also help.

In my case, if an alarm had alerted the doctor to how long the cuff had been in place, if the cuff had automatically deflated after a period of time, or if a checklist had reminded the doctor to remove it, my leg might never have been injured. Better yet, if the doctors had not used the cuff, which evidence has shown can be dangerous to patients, I would still be walking on that leg today.

Most of all, perhaps, we need better coordination and communication among caregivers. Consider what happened to Mary, my former wife and the mother of our two children. In 1988, she was lying in an intensive care unit with less than a 10 percent chance of survival. Her first symptom, a pain in the sole of her right foot, had seemed so innocent. A neurologist said she had most likely injured a nerve during aerobic dance and the doctor ignored our requests for further tests. But when Mary’s leg began to swell, we sought the help of an internist. She diagnosed thrombophlebitis, inflammation from blood clots. Mary was then admitted to the hospital for a blood thinner, but the medical team gave her too small a dosage. Her clots extended into her lungs. Next she suffered a heart attack, respiratory failure, renal failure and shock.