Safety of paracentesis in inpatients.

Introduction: Prior research has suggested that paracentesis is free from complications such as acute renal failure (ARF) providing albumin is administered. Actual safety of paracentesis > 1,000 ml was assessed at a tertiary care hospital.

Methods: 300 inpatient paracenteses performed between 12/99 and 4/04 were identified by coding records, of which 40 procedures were excluded due to lack of pre- or post-procedure lab values. Charts were reviewed for serum creatinine (Scr) before and after procedures, ascites volume, and clinical outcomes.

Results: 44 deaths occurred after 260 paracenteses (16.9%). Among 33 patients with ARF, 13 (39.4%) died. Only 31/227 patients without ARF (13.7%) died (p < 0.001). Serum creatinine (Scr) > 1.6 mg/dl prior to paracentesis predicted a 22.5% rate of ARF, compared to 8% for Scr < 1.0 (p = 0.002). ARF increased as volume increased (9.9%, 12.4%, and 14.9%, for volumes of < 2,300, 2,300 - 3,200, and > 3,200 ml) but this trend did not have statistical significance (p = 0.426). ARF occurred in 11/69 (15.9%) of patients receiving albumin, compared to 22/191 (11.5%) of patients who did not (p = 0.462).

Conclusions: Paracentesis in inpatients has significant rates of ARF and death. Scr > 1.6 prior to paracentesis predicts an increased rate of ARF. Development of ARF is associated with an increased rate of death. No advantage was demonstrated with administration of albumin. Pre- and post-paracentesis labwork should be routine in inpatients.