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Injury and liability associated with monitored anesthesia care: a closed claims analysis
Sanjay M Bhananker1, Karen L Posner, Frederick W Cheney
1Department of Anesthesiology, University of Washington, Virginia Mason Medical Center, Seattle, WA 98195, USA. sbhanank@u.washington.edu
Background:
To assess the patterns of injury and liability associated with monitored anesthesia care (MAC) compared with general and regional anesthesia, the authors reviewed closed malpractice claims in the American Society of Anesthesiologists Closed Claims Database since 1990.
Methods:
All surgical anesthesia claims associated with MAC (n = 121) were compared with those associated with general (n = 1,519) and regional (n = 312) anesthesia. A detailed analysis of MAC claims was performed to identify causative mechanisms and liability patterns.
Results:
MAC claims involved older and sicker patients compared with general anesthesia claims (P < 0.025), often undergoing elective eye surgery (21%) or facial plastic surgery (26%). More than 40% of claims associated with MAC involved death or permanent brain damage, similar to general anesthesia claims. In contrast, the proportion of regional anesthesia claims with death or permanent brain damage was less (P < 0.01). Respiratory depression, after absolute or relative overdose of sedative or opioid drugs, was the most common (21%, n = 25) specific damaging mechanism in MAC claims. Nearly half of these claims were judged as preventable by better monitoring, including capnography, improved vigilance, or audible alarms. On-the-patient operating room fires, from the use of electrocautery, in the presence of supplemental oxygen during facial surgery, resulted in burn injuries in 20 MAC claims (17%).
Conclusion:
Oversedation leading to respiratory depression was an important mechanism of patient injuries during MAC. Appropriate use of monitoring, vigilance, and early resuscitation could have prevented many of these injuries. Awareness and avoidance of the fire triad (oxidizer, fuel, and ignition source) is essential to prevent on-the-patient fires.
Insights
Monitored anesthesia care (MAC) injuries often result from oversedation and preventable fires. Improved monitoring and vigilance can significantly reduce patient harm during MAC procedures.
Area of Science:
- Anesthesiology
- Patient Safety
- Medical Malpractice
Background:
- Monitored anesthesia care (MAC) is increasingly utilized, necessitating an understanding of its associated risks.
- Malpractice claims provide valuable insights into anesthesia-related injuries and liability.
Purpose of the Study:
- To compare injury patterns and liability in monitored anesthesia care (MAC) versus general and regional anesthesia.
- To identify specific mechanisms and preventability of adverse events during MAC.
Main Methods:
- Analysis of closed malpractice claims from the American Society of Anesthesiologists Closed Claims Database since 1990.
- Comparison of 121 MAC claims with 1,519 general and 312 regional anesthesia claims.
- Detailed review of MAC claims to determine causative factors and liability.
Main Results:
- MAC patients were older and sicker, often undergoing elective eye or facial plastic surgery.
- Over 40% of MAC claims resulted in death or permanent brain damage, similar to general anesthesia.
- Respiratory depression from oversedation (21%) and operating room fires (17%) were key injury mechanisms in MAC claims, often preventable with better monitoring and fire safety awareness.
Conclusions:
- Oversedation causing respiratory depression is a significant cause of patient injury during MAC.
- Enhanced monitoring, vigilance, and prompt resuscitation can prevent many MAC-related injuries.
- Preventing operating room fires requires strict adherence to fire safety protocols, avoiding the "fire triad".
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