Abstract

The use of a tunneled catheter as the primary vascular access among old hemodialysis patients is frequent. Catheter-related bloodstream infection (CRBSI) is a common complication, associated with increased mortality. Data regarding the clinical presentation and outcomes of CRBSI among old hemodialysis patients is limited. All chronic hemodialysis patients hospitalized between 2010 and 2022 with CRBSI were included. Patients were classified into two groups: old adults (≥ 75) and younger patients.Clinical, microbiological, and outcome data were collected and analyzed. One hundred and fifty-four patients with CRBSI were identified. Fifty-seven were aged ≥ 75years.Mean age in the older and younger groups was 81.2 ± 5 and 59.7 ± 12.7, respectively. Male gender was predominant (64%). Charlson comorbidity score and Pitt bacteremia score were comparable among both groups. Norton score < 14 was more common among old persons (n = 24, 67% versus n = 21, 31%, p < 0.001), as well as nursing-home residence. Gram-negative pathogens and Staphylococcus aureuswere common in both groups. The frequency of inappropriate empirical antimicrobial treatment was higher among older persons. Overall, in-hospital and 90-day mortality was high (age ≥ 75, 36.8%, age < 75, 24.7%, p = 0.14).Age was not significantly associated with mortality after adjustment for low Norton score, residence, and inappropriate antimicrobial therapy as well as resistance patterns of bloodstream isolates [OR = 1.2 (95% CI 0.4-3.3),p = 0.76]. Clinical characteristics and outcomes of CRBSI were comparable among old and young hemodialysis patients.However, the high mortality rate in this cohort suggests that the use of tunneled catheters as a permanent vascular access should be discouraged in both patient groups.

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