Which of the following could suggest a prolonged recovery time after deep hypothermic circulatory arrest?

A prolonged recovery time after deep hypothermic circulatory arrest can be indicated by delayed extubation. Delayed extubation suggests that the patient may not be adequately improving post-operatively, often due to complications such as neurological deficits, respiratory issues, or an overall prolonged recovery process. When a patient remains intubated longer than expected, it can signify that their ability to maintain airway patency and respiratory function is compromised, often leading to extended time in recovery.

In contrast, a shorter hospital stay, heightened cognitive function, or rapid rewarming would typically imply a smoother recovery trajectory. A shorter hospital stay generally reflects efficient recovery and management post-surgery, while increased cognitive function suggests that cognitive recovery is occurring as expected. Rapid rewarming is a strategy employed during surgery to quickly restore normothermia, and while it can be helpful, it is not an indicator of recovery time. Therefore, delayed extubation serves as a clear marker of potential complications and an extended recovery period following deep hypothermic circulatory arrest.