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The efficacy of peritoneal lavage at elective abdominal operations
Abstract:
Human serum albumin microspheres of 1 micrometer diameter labelled with technetium-99 m were evaluated as a model for bacteria in two animal species. Peritoneal lavage recovered comparable amounts of an inoculum of microspheres and simultaneously instilled Escherichia coli. A prospective study was undertaken of 38 patients undergoing elective abdominal operations. Three lavages, each of 500 ml normal saline, were used. Over 80 per cent of the saline was recovered in 37 of the 38 patients with a median of 93 per cent. Recovery of microspheres was assessed from above the spleen, from Morison's pouch and from the pouch of Douglas. There was no difference in the recovery rates from the three sites of placement but significantly fewer microspheres were recovered via a right subcostal incision (median 59 per cent) compared with an upper midline incision (median 91 per cent).
Insights
Technetium-99m labeled human serum albumin microspheres effectively model bacteria for peritoneal lavage studies. Surgical incision type significantly impacts microsphere recovery, with upper midline incisions yielding higher recovery rates than right subcostal incisions.
Area of Science:
- Nuclear medicine
- Surgical research
- Biomedical engineering
Background:
- Peritoneal lavage is crucial for diagnosing intra-abdominal infections.
- Accurate assessment of lavage effectiveness is essential for clinical decision-making.
- Developing reliable models to evaluate lavage efficacy is a significant challenge.
Purpose of the Study:
- To evaluate technetium-99m labeled human serum albumin microspheres as a model for bacteria in peritoneal lavage.
- To assess the impact of surgical incision type on the recovery of microspheres via peritoneal lavage.
Main Methods:
- Human serum albumin microspheres (1 micrometer diameter) labeled with technetium-99m were used.
- Animal models were employed to compare microsphere and Escherichia coli recovery.
- A prospective study in 38 patients undergoing elective abdominal surgery assessed microsphere recovery from different abdominal sites and incision types.
Main Results:
- Microsphere recovery in animal models was comparable to Escherichia coli recovery.
- High saline recovery rates (median 93%) were achieved in 37 of 38 patients.
- No significant difference in microsphere recovery was observed from different peritoneal sites (spleen, Morison's pouch, pouch of Douglas).
- Significantly higher microsphere recovery was achieved with upper midline incisions (median 91%) compared to right subcostal incisions (median 59%).
Conclusions:
- Technetium-99m labeled human serum albumin microspheres serve as a viable model for bacteria in peritoneal lavage studies.
- Surgical incision approach significantly influences the efficiency of peritoneal lavage recovery.
- These findings have implications for optimizing peritoneal lavage techniques in surgical settings.