Risk factors for staphylococcal bacteremia in patients undergoing hemodialysis using dual lumen catheters

Moon, Soo Youn; Lee, Mi Suk

Abstract

BACKGROUND/AIMS: Risk factors for infection in patients undergoing hemodialysis during dual lumen catheterization have not been adequately defined. We investigated risk factors associated with Staphylococcal bacteremia (SB) in patients undergoing hemodialysis using a catheter.
METHODS
Patients undergoing hemodialysis with a catheter were categorized into either the SB group (n=43) or control group (n=44). Data on patient demographics, the presence of underlying diseases, antibiotic use, APACHE II scores, and laboratory findings were collected retrospectively.
RESULTS
Patients in the SB group tended to be older, and underwent dialysis upon admission more frequently, as compared with controls. In addition, the SB group had higher APACHE II scores, BUN, and lower creatinine levels upon admission, as compared with the control group. A multivariate analysis showed that dialysis upon admission was a risk factor for SB in patients undergoing hemodialysis using a catheter. Patients with Staphylococcus aureus bacteremia (SAB) also tended to be older and showed a higher incidence of both dialysis upon admission and antibiotic therapy prior to catheterization, as compared with the control group. Patients with SAB also had higher APACHE II scores, BUN and creatinine levels upon admission. Antibiotics prior to catheterization, higher creatinine levels, and dialysis upon admission were all independent risk factors for SAB. Patients with methicillin-resistant SB had lower albumin and creatinine levels than those with methicillin-susceptible SB. The incidences of catheterization in the general ward or ICU and antibiotic therapy prior to catheterization were both higher in the methicillin-resistant SB group. Catheterizations in the general ward or ICU and antibiotic therapy prior to catheterization were both independent risk factors for methicillin-resistant SB.
CONCLUSIONS
In patients undergoing hemodialysis with a catheter, dialysis upon admission was an independent risk factor for SB. Additionally, antibiotic therapy prior to dual lumen catheterization was a risk factor for methicillin-resistant SB.