Increased transperitoneal bacterial translocation in laparoscopic surgery.

Area of Science:

• Surgical innovation and patient safety
• Microbiology and infection control
• Gastrointestinal disease research

Background:

• Laparoscopic surgery indications are expanding to include peritonitis-associated conditions.
• The safety of carbon dioxide (CO2) pneumoperitoneum in peritonitis remains unproven.
• Previous studies indicated increased bacteremia with CO2 insufflation.

Purpose of the Study:

• To investigate bacterial translocation with different gases and pressures during pneumoperitoneum.
• To clarify the roles of intra-abdominal pressure and gas type in bacterial translocation.
• To assess the safety of CO2 and helium pneumoperitoneum in a peritonitis model.

Main Methods:

• 110 rats with induced peritonitis were inoculated with Escherichia coli.
• Groups included a control (no pneumoperitoneum), and pneumoperitoneum with helium or CO2 at 14 mmHg and 3 mmHg.
• Blood cultures were monitored for bacterial translocation over 165 minutes.

Main Results:

• Pneumoperitoneum significantly increased bacterial translocation compared to controls.
• Bacterial translocation was elevated in low-pressure (3 mmHg) groups for both helium and CO2.
• Gas type was less influential than the presence of gas and pressure in bacterial translocation.

Conclusions:

• Insufflation with CO2 or helium increases bacterial translocation in a rat peritonitis model.
• Lower insufflation pressures (3 mmHg) are associated with a greater risk of bacterial translocation.
• Clinical conclusions on gas type or pressure effects remain unconfirmed.