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  • Title: Cost analysis of antibiotic-impregnated catheters in the treatment of hydrocephalus in adult patients.
    Author: Farber SH, Parker SL, Adogwa O, Rigamonti D, McGirt MJ.
    Journal: World Neurosurg; 2010; 74(4-5):528-31. PubMed ID: 21492607.
    Abstract:
    OBJECTIVE: To determine if use of antibiotic-impregnated shunt (AIS) systems to reduce cerebrospinal fluid (CSF) shunt infections in adult patients with hydrocephalus has been cost-effective at one institution. METHODS: All adult patients undergoing CSF shunt insertion over a 7-year period at the Johns Hopkins Hospital were retrospectively reviewed (2004-2009). In 2006, a categorical switch to AIS catheters was made. Before 2006, standard nonimpregnated shunt catheters were used. The 1-year incidence of shunt infection was retrospectively assessed and accounting and billing records were reviewed to determine shunt infection-related medical costs for patients undergoing AIS vs non-AIS shunt surgery. RESULTS: A total of 500 (250 AIS, 250 non-AIS) shunt surgeries were performed for normal-pressure hydrocephalus (NPH) (n = 378 [76%]), pseudotumor cerebri (n = 83 [17%]), and various obstructive and communicating hydrocephalus etiologies (n = 40 [8%]). The incidence of shunt infection was decreased in the AIS (1.2%) vs non-AIS (4.0%) cohorts (P = .0492. Overall, the mean cost per shunt infection was $40,371. Per 250 shunts placed, the total infection-related cost was reduced from $321,407 to $203,424 after the conversion to AIS catheters. AIS catheters were associated with direct cost savings of $47,193 per 100 shunt surgeries performed. CONCLUSIONS: In a retrospective cohort study of 500 CSF shunt surgeries performed in adult patients with hydrocephalus, this institution's categorical conversion to AIS catheters was associated with a significant reduction in infection-related medical costs within the first year after surgery. Although prospective randomized cost-utility studies are needed to confirm these observations, these results suggest that AIS catheters are cost-effective in the treatment of hydrocephalus in adult patients.
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