title: Patients with hemoptysis examined by Tc-99m sulfur colloid and Tc-99m-labeled red blood cells: a preliminary appraisal.
abstract: A prospective study of 16 patients with hemoptysis was conducted over a 2 1/2-year period. Technetium-99m sulfur colloid (Tc-SC) and technetium-99m-labeled red blood cells (Tc-RBC) were sequentially used to identify the general area of bleeding. Tc-SC accurately located the bleeding area in 3 patients and Tc-RBC identified the bleeding area in 8; there were no false-positive studies. Tc-SC scans were positive at 6-10 minutes and all patients had positive Tc-RBC studies. In general, the scans accurately located the source of bleeding as determined by bronchoscopy and/or surgery. Because of the small sample, statistically significant differences between both techniques were not ascertained. Both Tc-SC and Tc-RBC may prove to be helpful, minimally invasive imaging procedures for determining the general area of hemorrhage in patients with clinically significant hemoptysis. Although a trend suggests that Tc-RBC is a more sensitive method, further comparison is needed for corroboration.
mesh_terms: D000328:Adult; D000368:Aged; D001999:Bronchoscopy; D004912:Erythrocytes; D005260:Female; D006469:Hemoptysis / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011859:Radiography; D011877:Radionuclide Imaging; D013671:Technetium Tc 99m Sulfur Colloid
chemical_list: D013671:Technetium Tc 99m Sulfur Colloid