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Evaluation of potential renal transplant recipients with computed tomography angiography.

Archives of Surgery 2012 December
OBJECTIVES: To determine the safety, clinical yield, and cost of computed tomography angiography (CTA) use in the workup of potential renal transplant recipients.

DESIGN: Single-site, retrospective review of medical, surgical, and radiologic records.

SETTING: Large university tertiary care center.

PATIENTS: Potential recipients of transplants from living donors.

INTERVENTIONS: Computed tomography with and without 100 mL of iodixanol intravenous contrast enhancement as part of the preoperative workup.

MAIN OUTCOME MEASURES: Mean pre- and post-CTA estimated glomerular filtration rate and number of patients requiring emergent dialysis after CTA, number of patients who had their treatment changed by CTA findings, patient predictors of significant CTAs, and cost per significant CTA.

RESULTS: From July 20, 2006, through December 10, 2010, a total of 179 transplant candidates underwent CTA. Forty-two patients were predialysis at the time of CTA. Mean (SD) serum creatinine levels in this group were unchanged after CTA (5.06 [2.13] mg/dL vs 5.00 [2.28] mg/dL [to convert to micromoles per liter, multiply by 88.4], P = .49), and no patients required subsequent emergent dialysis. Forty-one patients (22.9%) had their treatment changed by CTA findings. Multivariate logistic regression analysis revealed 3 patient history and physical criteria that predicted significant CTA findings: chronic infection (odds ratio, 10.91; 95% CI, 2.72-43.69; P < .001), patient weight less than 69 kg (3.11; 1.49-6.51; P < .001), and ventral torso surgical scarring (4.13; 1.57-10.84; P < .001). Diagnostic cost per significant CTA study was $2660, with an estimated reduced cost of $1480 per significant study with screening using 1 of the 3 predictors.

CONCLUSION: Diagnostic CTA is a safe and cost-effective procedure for both operative planning and screening for potentially prohibitive abdominal disease.

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