Veterinary Technician

Answer: D - The risk of using manual or mechanical ventilation in a hypotensive patient is a drop in blood pressure. This could prove life threatening to such a patient due to the positive pressure generated in the inspiratory phase of ventilation, causing diminished venous return. Pressure in the breathing circuit should be maintained at no more than 20cm of water for small animal patients and 30-40cm of water for large animal patients.