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How high are anesthesiology malpractice rates? Do Anesthesiologists pay the highest malpractice insurance rates?
In a word, “No.”
Anesthesia mishaps can lead to critical events such as death or coma, but in recent decades improvements in operating room technology and education have led to fewer such events.
Prior to 1985, anesthesia malpractice claims for death or brain death were most often due to lack of oxygen the patient’s heart or brain. Two significant breakthroughs arrived in the 1980’s to help anesthesiologists care for you: 1) the pulse oximeter, and 2) the end-tidal carbon dioxide monitor.
The pulse oximeter, developed by Nellcor and Stanford anesthesiologist William New, M.D., is a device that clips to a patient’s fingertip. A light-emitting diode shines a red light through the finger, and a sensor on the opposite side of the finger measures the degree of redness in the pulsatile blood flow within the finger. The more red the color of the blood, the more oxygen is present. A computer in the pulse oximeter calculates a score, called the oxygen saturation, which is a number from 0-100%. An oxygen saturation equal to or greater that 90% correlates with a safe amount of oxygen in the arterial blood. A score of 89% or lower correlates with a dangerously low oxygen level in the blood. The pulse oximeter monitor enables doctors to know, second-to-second, whether a patient is getting sufficient oxygen. If the oxygen saturation goes below 90%, doctors will act quickly to diagnose and treat the cause of the low oxygen level. A patient can usually sustain a short period low oxygen saturation, e.g. up to 2 or 3 minutes, without permanent damage to the brain or cardiac arrest by an oxygen-starved heart.
The end-tidal carbon dioxide (CO2) monitor is a device that measures the concentration of CO2 in the gas exhaled by a patient on every breath. During normal ventilation, every exhaled breath contains CO2. When no CO2 is measured, there is no ventilation, and the doctor must act quickly to diagnose and treat the cause of the lack of ventilation.
Prior to the invention of these two monitors, it was possible for an anesthesiologist to mistakenly place a breathing tube in a patient’s esophagus, instead of the trachea, and not know of the error until the patient sustained a cardiac arrest. With the addition of the two monitors, the lack of CO2 (there is no CO2 in the stomach or esophagus) from the end-tidal CO2 monitor immediately indicates that the tube is in the wrong place. The anesthesiologist can then remove the tube, resume mask ventilation with oxygen, and attempt to replace the tube into the windpipe. If the oxygen level to the patient’s blood dips below 90%, this is a second piece of data that indicates that the patient is in danger of brain damage or cardiac arrest.
In addition, in the early 1990’s the American Society of Anesthesiologists created the Difficult Airway Algorithm, which is a step-by-step approach for anesthesiologists to follow when the task of placing a breathing tube for an anesthetic is challenging or difficulty. This Algorithm dictates a standard of care for practitioners, and this advance in education lowered the number of mismanaged airways.
In the 1980’s, surgical anesthesia claims were 80% of closed malpractice claims against anesthesiologists (American Society of Anesthesiologists Closed Claims database). By the 2000’s, this number dropped to 65%. Brain damage represented 9% of claims, and nerve injury accounted for 22% of claims (23% were permanent and disabling, including loss of limb function, or paraplegia or quadriplegia) Less common claims were airway injury (7% of claims), emotional distress, (5% of claims), eye injuries including blindness (4% of claims), and awareness during general anesthesia (2% of claims).
Decreasing anesthesiologist malpractice premiums reflect the decrease in the number of catastrophic anesthesia claims for esophageal intubation, death, and brain death.
In 1985, the average malpractice insurance premium was $36,224 per year for a $1 Million per claim/$3 Million per year policy. By 2009, this decreased to $21,480, a striking 40% drop.(Anesthesia in the United States 2009, Anesthesia Quality Institute)
Specialties with the highest risk of facing malpractice claims are neurosurgery (19.1 percent), thoracic and cardiovascular surgery (18.9 percent) and general surgery (15.3 percent). Specialties with the lowest risks are family medicine (5.2 percent), pediatrics (3.1 percent) and psychiatry (2.6 percent). Anesthesiologists rank in the middle of the pack, at 7%. (Malpractice Risk According to Physician Specialty, Jena, et al, N Engl J Med 2011) From 1991 to 2005, this article identified 66 malpractice awards that exceeded $1 million dollars, which accounted for less than 1% of all payments. Obstetrics and gynecology accounted for the most payments (11), followed by pathology (10), anesthesiology (7), and pediatrics (7).
The take-home message is that anesthesia has serious risks, but those risks have decreased significantly in recent years because of improvements in monitoring and education. Compared to other specialties, the risk of an anesthesiologist being sued is about average among American medical specialties.
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