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Background: As patients turned into prone position experienced change in heamodynamics (heart rate and mean arterial blood pressure) than those on supine position, this prospective, randomized study was designed to compare the effect of PCV and Volume-Controlled Ventilation (VCV) on heamodynamics in the prone position using the Wilson frame during elective lumbar spine surgery. Patients and Methods: Sixty patients scheduled for elective lumbar spine surgery were randomly allocated to receive mechanical ventilation using either the VCV (n=30) or PCV (n=30) mode. Hemodynamic variables (heart rate, mean arterial blood pressure). Results: Heart rate as beat/min. (p-value 1): In volume controlled group during supine position mean ± SD value was (76± 12) and during prone position was (69±12) and in pressure controlled group it was (82±17) in supine position and (72± 13) in prone position and mean arterial blood pressure as mmHg (p-value 0.6): In volume controlled group mean ± SD in supine position was (80±9) and in prone position it was (77± 11), and in pressure controlled group it was (84 ± 14) in supine position and (77±9) in prone position. Conclusions: PCV provides lower Ppeak compared with VCV when the ventilator is set to deliver the same tidal volume and variable respiratory rate to maintain a constant end-tidal carbon dioxide tension in patients undergoing posterior lumbar spine surgery in the prone position using the Wilson frame.

the medical journal of cairo university/the medical journal of cairo university

Comparative Study between Pressure Controlled Ventilation and Volume Controlled Ventilation on Hemodynamics in Prone Patients Undergoing Elective Spine Surgeries