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Intra-abdominal venous pressure during laparoscopic cholecystectomy
1Department of Surgery, Osaka Prefectural Hospital, Japan.
Summary
During laparoscopic cholecystectomy, intra-abdominal pressure was maintained at 12 mmHg. Inferior vena cava (IVC) pressure equaled intra-abdominal pressure, while superior vena cava (SVC) pressure remained stable, with minimal positional effects.
Area of Science:
- Cardiovascular Physiology
- Surgical Anesthesiology
- Minimally Invasive Surgery
Background:
- Laparoscopic cholecystectomy involves elevated intra-abdominal pressure (IAP).
- Understanding central venous pressure (CVP) changes during laparoscopy is crucial for patient management.
- Limited data exists on serial SVC and IVC pressure dynamics under sustained pneumoperitoneum.
Purpose of the Study:
- To investigate the effects of sustained pneumoperitoneum on superior vena cava (SVC) and inferior vena cava (IVC) pressures.
- To assess the impact of patient positioning and surgical manipulation on SVC and IVC pressures during laparoscopic cholecystectomy.
Main Methods:
- Serial measurements of SVC and IVC pressures were performed during laparoscopic cholecystectomy.
- Intra-abdominal pressure was maintained at 12 mmHg.
- Patient position was altered from head-down to head-up (15 degrees), and gallbladder retraction was performed.
Main Results:
- IVC pressure closely approximated intra-abdominal pressure during prolonged pneumoperitoneum (>60 min).
- SVC pressure showed no significant changes throughout the operation.
- Mild effects on SVC and IVC pressures were observed with positional changes and gallbladder retraction.
Conclusions:
- Sustained pneumoperitoneum at 12 mmHg primarily affects IVC pressure, making it nearly equal to IAP.
- SVC pressure remains relatively stable, indicating preserved right atrial filling dynamics.
- The discrepancy between SVC and IVC pressures is maintained, suggesting consistent hemodynamic monitoring parameters during laparoscopic procedures.