Dr. James Dunphy met his wife Susie in college. They went to medical school together, got married and had two sons. On a family trip to Florida in 2009, Dr. Susie Dunphy was diagnosed with appendicitis. She had emergency surgery; two days later the 42-year-old bled to death in her hospital bed.

Drs. James and Susie Dunphy with their children

James Dunphy said the hardest part was breaking the news to his two young boys.

"I told them it would be okay, and that I would be their mom and dad now," Dunphy said.

In the weeks after her death, Dunphy reviewed his wife's medical file. What he read convinced him that her doctor could have prevented her death. He said his wife's blood pressure had been critically low for hours after the surgery. But no lab tests or imaging studies were ordered to see what was wrong.

"These are the kind of vitals that anybody with basic training can recognize as abnormal," Dunphy told CBS News.

Dunphy sued his wife's surgeon for failing to adequately monitor her after the procedure, blaming him in part for her death.

Dr. Ernest Rehnke has had 11 medical malpractice lawsuit payouts since 2000 - tying him for the most of any practicing physician in Florida.

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Despite multiple malpractice payouts, doctors often keep practicing