Accuracy of diagnosis on CT scan of Surgicel® Fibrillar: results of a prospective blind reading study

ObjectiveOxidized regenerated cellulose is a hemostatic agent used in surgery to control bleeding. Some case reports have suggested that it could lead to a mistaken diagnosis of abscess on postoperative CT scan. The objective of this study was to evaluate the diagnostic accuracy of CT scan for Surgicel® Fibrillar.Study designWe prospectively registered all patients who had Surgicel® Fibrillar left in the operative site during one year. Patients who had a CT scan for medical reasons (e.g. fever, pain, or occlusive syndrome) were evaluated and we compared the radiologists’ conclusions with or without information about the use of Surgicel® (two different radiologists, one blinded to the use of Surgicel®).Results18 patients who underwent pelvic laparotomy had Surgicel® Fibrillar left in the operative site. On first interpretation, the radiologist's conclusion was an abscess in 11% of cases, hematoma in 28%, collections with hydro-aeric levels in 33%, lymphocele in 6% and no conclusion in 11% of cases. For only 2 patients (11%) was the conclusion Surgicel® Fibrillar. After second interpretation by a radiologist aware of the presence of Surgicel® Fibrillar, Surgicel® Fibrillar was the main conclusion on 15 CT scans (83%).ConclusionOxidized regenerated cellulose is a differential diagnosis for abscess or collection. The radiologist should be informed about its presence to increase appropriate evaluation of CT scans and avoid inappropriate treatment.