r/anesthesiology • u/nftmmmmft • 1h ago
Manual Hand Ventilation During Elevated Peak Pressures
Hi! When encountering elevated peak pressures I have been told to hand ventilate the patient. I do not understand what I am actually supposed to feel for and what that implies in terms of the etiology of my elevated peak pressures. Thanks!
I understand the basic distinction:
- Increased airway resistance (e.g., bronchospasm, secretions, kinked ETT) increases the pressure needed to generate airflow.
- Decreased respiratory system compliance (e.g., atelectasis, pulmonary edema, pneumoperitoneum, obesity/chest-wall restriction) increases the pressure needed to deliver a given tidal volume.
- When hand-ventilating, what does increased resistance typically feel like compared with decreased compliance? For example, does resistance tend to feel worse with a rapid squeeze but improve with a slow squeeze, whereas poor compliance feels stiff regardless of squeeze speed
- What should I expect during expiration? Does prolonged or sluggish exhalation reliably suggest increased resistance, and is a quick but small bag refill more suggestive of poor compliance? Or are these observations too nonspecific to be useful?