[Right ventricular function and postural changes during surgery of the lumbar spine]

Area of Science:

• Anesthesiology
• Cardiovascular Physiology
• Surgical Positioning

Context:

• Low back surgery often necessitates specific patient positioning.
• Understanding the impact of surgical positions on cardiovascular function is crucial for patient safety.
• Right ventricular function can be affected by changes in thoracic pressure and volume distribution.

Purpose:

• To evaluate the effects of the sitting prone position on right ventricular function during low back surgery.
• To assess hemodynamic changes associated with this surgical posture.
• To determine the safety and potential risks of the sitting prone position for right ventricular performance.

Summary:

• Right heart catheterization using thermodilution revealed moderate hemodynamic effects in the sitting prone position.
• A transient decrease in right ventricular compliance was observed, potentially due to sternal compression.
• Fluid challenges effectively improved right ventricular function, suggesting reversibility of the impairment.

Impact:

• The sitting prone position appears to be safe for patients undergoing low back surgery, with manageable effects on right ventricular function.
• These findings contribute to optimizing anesthetic and surgical management for spinal procedures.
• Highlights the importance of monitoring cardiac function during prone positioning in surgical settings.