In which surgical scenario would IPPV be required?

• A. Diaphragmatic hernia repair
• B. Routine dental cleaning
• C. Minor skin lesion excision
• D. Spay in a healthy patient

Answer: (A)

Mechanical ventilation becomes essential when the patient’s own breathing can’t maintain adequate gas exchange because of the surgery and anesthesia. In diaphragmatic hernia repair, the diaphragm is directly involved and lung capacity is already compromised; manipulating the diaphragm and lifting abdominal contents can severely affect ventilation. Under anesthesia, spontaneous breathing is often reduced or eliminated, so a ventilator is used to deliver controlled breaths, keep the lungs inflated, and maintain steady oxygen and CO2 levels throughout the procedure.

The other scenarios are typically short, non-thoracic procedures where spontaneous ventilation can be preserved or only light anesthesia is used, so intermittent positive pressure ventilation isn’t routinely required.