What are the indications and contraindications of diagnostic peritoneal lavage?
Diagnostic peritoneal lavage (DPL) is a procedure used to determine if there is intra-abdominal bleeding or organ damage, typically in the context of trauma. It involves the introduction of a catheter into the peritoneal cavity to lavage (wash out) the cavity and then analyze the fluid retrieved.
Indications
DPL is indicated in the following situations:
- Blunt Abdominal Trauma: Especially when the patient’s hemodynamic status is unstable, and other diagnostic methods (like FAST or CT scan) are not immediately available or conclusive.
- Penetrating Abdominal Trauma: In cases where the trajectory of the injury is uncertain, and there is a need to determine if there is intra-abdominal injury.
- Equivocal Clinical Examination: When physical examination and initial imaging results are inconclusive, particularly in patients with altered mental status or intoxication, where physical exam findings might be unreliable.
- Multiple Injuries: In polytrauma patients where the source of hypotension or shock is unclear and needs rapid assessment.
Contraindications
DPL is contraindicated in the following situations:
- Clear Indication for Laparotomy: When there is an obvious need for surgical exploration, such as evisceration or peritonitis.
- Advanced Pregnancy: In pregnant patients, especially in the third trimester, due to the risk of injuring the gravid uterus.
- Previous Abdominal Surgery: History of major abdominal surgery can increase the risk of adhesions and complications during the procedure.
- Severe Pelvic Fractures: Particularly if there is suspicion of bladder injury or disruption, as the catheter placement can exacerbate these injuries.
- Coagulopathy: Patients with significant clotting disorders may have an increased risk of bleeding complications during the procedure.
Relative Contraindications
These are situations where the risk-benefit ratio must be carefully considered:
- Obesity: Technical difficulties and increased risk of complications.
- Preexisting Peritonitis: Infection might complicate the interpretation of lavage results.
- Subcutaneous Emphysema: Can obscure the anatomical landmarks required for safe catheter placement.
