apnea test

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apnea test

A test used to determine whether a comatose person receiving life support has suffered brain death.

Patient care

The patient's ventilator is set to deliver no breaths per minute, and the carbon dioxide level of the blood is allowed to rise 20 mmg Hg to a level that is at least above 60 mm Hg. If apnea (no spontaneous breathing) occurs, brain death is confirmed. The test should not be performed if the person has recently received sedative, narcotic, or paralytic drugs; those drugs may suppress spontaneous breathing, falsely suggesting brain death.

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References in periodicals archive ?
Breathing during sleep was evaluated with a home sleep apnea test, which revealed that 42 per cent had at least mild sleep apnea.
"They had carried out an apnea test where they switch off the machines to see if he could breathe by himself and assess his eye movement.
The main factors affecting the completion rate were hypotension (12%), acidosis (68%), and hypoxemia (23%).[9] The Mayo Clinic in the United States reviewed brain death cases from 1996 to 2007 in 2008,[10] and the results showed that 212 of 228 patients completed apnea testing; only 7% of them were unable to complete the test because of circulatory instability or hypoxemia, and 11.3% of cases had to abort the apnea test process due to hypotension or hypoxemia.
Because CBF was preserved, no apnea test and no second EEG were performed at H72 despite the absence of brain stem reflexes and a first flat EEG.
For most people suspected to have obstructive sleep apnea who are otherwise healthy, a home sleep apnea test can be a first-line option to distinguish obstructive sleep apnea from snoring alone.
We then reviewed the apnea test for completeness including documenting prerequisites (temperature [greater than or equal to] 36[degrees]C, systolic blood pressure [greater than or equal to] 100 mmHg, PaCO2 40 [+ or -] 5 mmHg, and PaO2 [greater than or equal to] 90 mmHg and euvolemia), procedural details (e.g., amount of oxygen supplied in L/min and absence of respiratory effort), and the final PaCO2.
Results: The current hospital policy lacked two important components of any BD policy: (a) the apnea test techniques and (b) guidance regarding secondary confirmatory testing.
The subjects were instructed to lie down in the supine position for a 5-min rest period before completing the dry static apnea test as previously described (11).
Finally, in what's called the apnea test, the ventilator is disconnected to see if you can breathe unassisted.
The doctor said the final test done before the boy was declared brain dead, an apnea test, had doctors remove the ventilator helping Nathaniel breathe.