Q: Q: What is 'card test' for extubation?
Answer: Cough strength is considered to be one of the most reliable indicators of successful extubation. Cough strength is usually evident with deep suctioning of the endotracheal tube (ETT). Experts have developed some formal tests and one of the formal tests is the 'card' test. It can be performed by detaching ETT and holding a simple index card at about 2 cm away from the ETT tip. If a patient cannot moisten the card on 3-4 attempts at cough, the likelihood of failed extubation is high.
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Reference:
Khamiees M, Raju P, DeGirolamo A, et al. Predictors of extubation outcome in patients who have successfully completed a spontaneous breathing trial. Chest 2001; 120:1262.
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