Testing for apnea in suspected brain death: methods used by 129 clinicians

Area of Science:

• Neurology
• Critical Care Medicine

Background:

• Determining brain death requires accurate apnea testing.
• Published guidelines recommend specific rigorous methods for this critical assessment.

Purpose of the Study:

• To investigate the current practices of neurologists in Colorado and California regarding apnea testing for brain death determination.
• To compare these practices against established, rigorous guidelines.

Main Methods:

• A survey was distributed to neurologists in Colorado and California.
• Respondents were asked about their methods for apnea testing when assessing brain death.
• Data on observation duration, carbon dioxide measurement, use of published methods, and absence of testing were collected.

Main Results:

• 65.1% of 129 respondents used brief observation (≤3 minutes) off the ventilator.
• Only 12.4% employed a published rigorous apnea testing method.
• 22.5% measured arterial carbon dioxide, and 11.6% did not test for apnea.
• Academic neurologists were more likely to use rigorous methods.

Conclusions:

• Current apnea testing practices for brain death determination in the surveyed regions are often less rigorous than recommended guidelines.
• There is a discrepancy between common clinical practice and evidence-based protocols for apnea testing.