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Patterns of microbiology in intra-abdominal packing for trauma
Thomas S Granchi1, John A Abikhaled, Asher Hirshberg
1Michael E DeBakey Department of Surgery, Baylor College of Medicine and Ben Taub General Hospital, Houston, TX 77030, USA.
Introduction:
This study tracks the microbiology of packs and infections in damage-control trauma patients to determine whether the packs cause infections.
Methods:
The peritoneum and abdominal packs were cultured in patients who survived to re-operation. The study recorded all positive cultures, pack count, packing duration, number of operations, and infections.
Results:
Thirty-five patients were studied. Twenty-eight patients survived; seven died. Packs were cultured in 29 patients. Data for 291 cultures collected. Pack cultures were positive in 20 patients and negative in nine. Positive pack cultures grew skin and gut flora. Twenty-one patients had infections, 14 did not. Organisms from positive pack cultures did not contribute to subsequent infections or mortality. Microbes and sites of infections were consistent with SICU patients.
Conclusions:
Intra-abdominal packs are contaminated with skin and gut flora. These contaminants, however, do not contribute to subsequent infections. Pathogens from subsequent infections were typical for ICU infections.
Insights
Intra-abdominal packs in trauma patients are often contaminated with skin and gut bacteria, but these contaminants do not lead to subsequent infections or increased mortality. Infection causes in trauma intensive care units are typical.
Area of Science:
- Trauma Surgery
- Infectious Disease Microbiology
Background:
- Damage-control surgery frequently involves the use of intra-abdominal packing.
- The role of microbial contamination of these packs in post-operative infections remains unclear.
Purpose of the Study:
- To investigate the microbiology of abdominal packs used in damage-control trauma surgery.
- To determine if pack contamination correlates with the development of intra-abdominal infections.
Main Methods:
- Culturing of abdominal packs and peritoneal fluid from trauma patients who survived to re-operation.
- Recording of positive cultures, pack counts, duration of packing, number of operations, and infection status.
Main Results:
- Of 35 patients studied, 28 survived. Pack cultures were positive in 20 of 29 patients, growing common skin and gut flora.
- Twenty-one patients developed infections; however, organisms from positive pack cultures did not contribute to these infections or mortality.
- Infection sites and microbial profiles were consistent with those typically seen in surgical intensive care unit (SICU) patients.
Conclusions:
- Intra-abdominal packs are frequently contaminated with commensal flora from the skin and gut.
- This contamination does not appear to be a significant factor in the development of subsequent infections or patient mortality.
- Infections observed in these trauma patients are caused by pathogens typical for the intensive care unit (ICU) environment.
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