Question

In which clinical context is low fresh gas flow contraindicated?

1) Pediatric patients
2) Patients with compromised lung function
3) Patients undergoing major surgery
4) Patients with normal lung function

Answer 1

Low fresh gas flow is contraindicated in patients with compromised lung function due to the potential exacerbation of V/Q mismatch and the risk of inadequate gas exchange.

Step-by-step explanation:

Low fresh gas flow is generally contraindicated in patients with compromised lung function. Increased resistance and decreased compliance, both characteristic of various pulmonary diseases, can drastically affect breathing and the effectiveness of gas exchange. Specifically, diseases such as asthma, emphysema, respiratory distress syndrome, and pulmonary fibrosis, which can cause restrictive or obstructive lung conditions, alter the V/Q ratio and present challenges in maintaining adequate ventilation. In these patients, the use of low fresh gas flow during anesthesia may exacerbate an existing V/Q mismatch, potentially leading to inadequate gas exchange and hypoxemia. Therefore, it is more critical to monitor and adjust gas flow settings carefully in patients with compromised lung function.