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.

References in periodicals archive ?
The National Transportation Safety Board recommended that the FRA require all railroads to screen for and treat sleep apnea more than a decade ago, after a 2001 accident in Michigan, however, some rail lines have yet to perform a single sleep apnea test.
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.
In summary, the criteria of the United States consist of four steps: (1) Prerequisites: definite and irreversible coma whose cause should be excluded drug, hypothermia, alcohol, and other laboratory abnormal values; (2) examination: absence of brainstem reflexes; (3) the apnea test result is positive; and (4) ancillary tests can be used when uncertain about the clinical examination or when the apnea test cannot be performed.
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.
sup][1] In summary, the criteria of the BD diagnoses consist of four steps: (1) The clinical examination confirm the BD diagnose, including deep coma, absence of brainstem reflexes, and no spontaneous respiration; (2) confirmatory tests should fulfill two of the three which include transcranial Doppler (TCD), electroencephalogram (EEG), and somatosensory evoked potential; (3) the apnea test is positive; and (4) a repeat determination should be done 12 h after the first time.
The apnea test is intended to determine the patient's ability/inability to breathe unaided.