Abstract
PurposeTo determine whether the inpatient versus outpatient status of patients at the time of port placement affects the infection rate. Materials and MethodsThrough a quality assurance database, all patients undergoing port insertion by interventional radiology personnel at a single institution between 2001 and 2010 were identified (N = 2,112). From this cohort, 1,030 patients with a known reason for port removal were retrospectively analyzed. All ports were of the same design. Data were analyzed according to inpatient/outpatient status at insertion and indications for port placement, including solid or hematologic malignancy and access for total parenteral nutrition or pheresis. Effects of inpatient/outpatient status on the reason for, and total time until, catheter removal were determined. Infections were defined as culture-positive bacteremia or clinically suspected port pocket infection. ResultsNo significant differences were seen in age (P = .32), sex (P = .4), or access site (P = .4) between groups. There was a significant difference in total infection-free catheter days between groups, with means of 241 days for inpatients and 305 for outpatients (P<.001). Inpatients had a significantly higher infection rate per 1,000 catheter-days versus outpatients (0.72 vs 0.5; P = .01). Similarly, there was a significant difference between inpatients and outpatients in time to port removal for infection or dehiscence, with the hazard of inpatients needing removal 45% greater than that of outpatients (P = .03). The increased hazard of inpatients needing port removal was significant even after accounting for placement indication (P = .02). ConclusionsPort placement in an outpatient setting results in longer infection-free survival for a wide variety of placement indications.
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