Stroke volume variation does not correlate with central venous pressure during hepatectomy

Area of Science:

• Anesthesiology
• Surgical Monitoring
• Hepatobiliary Surgery

Background:

• Central venous pressure (CVP) measurement is the standard for monitoring patients during hepatectomy to maintain low pressure and minimize blood loss.
• Stroke volume variation (SVV) has emerged as a potential tool for monitoring preload and guiding fluid replacement in liver surgery.

Purpose of the Study:

• To determine if SVV correlates with CVP values during liver resection.
• To assess if SVV can replace CVP measurement in hepatectomy procedures.

Main Methods:

• 30 patients undergoing 32 liver resections were included between January 2021 and February 2022.
• Paired CVP and SVV data were collected every 10 minutes throughout the surgeries.
• Correlation analysis was performed, stratified by surgical approach, hilar clamping, operative timing, and PEEP values.

Main Results:

• A total of 519 paired SVV/CVP values were recorded.
• A very weak negative correlation was detected between SVV and CVP (Pearson coefficient -0.122, p=0.005).
• Stratified analysis confirmed no significant correlation between SVV and CVP under various surgical conditions.

Conclusions:

• CVP and SVV values show no relevant correlation during liver surgery.
• CVP measurement remains valuable and should not be replaced by SVV monitoring for safe hepatectomy.