Noninvasive evaluation of active lower gastrointestinal bleeding: comparison between contrast-enhanced MDCT and 99mTc-labeled RBC scintigraphy.

OBJECTIVE: The purpose of our study was to compare contrast-enhanced MDCT and (99m)Tc-labeled RBC scanning for the evaluation of active lower gastrointestinal bleeding. SUBJECTS AND METHODS: Over 17 months, 55 patients (32 men, 23 women; age range, 21-92 years) were evaluated prospectively with contrast-enhanced MDCT using 100 mL of iopromide 300 mg I/mL. Technetium-99m-labeled RBC scans were obtained on 41 of 55 patients and select patients underwent angiography for attempted embolization. Each imaging technique was reviewed in a blinded fashion for sensitivity for detection of active bleeding as well as the active lower gastrointestinal bleeding location. RESULTS: Findings were positive on both examinations in eight patients and negative on both examinations in 20 patients. Findings were positive on contrast-enhanced MDCT and negative on (99m)Tc-labeled RBC in two patients; findings were negative on contrast-enhanced MDCT and positive on (99m)Tc-labeled RBC in 11 patients. Statistics showed significant disagreement, with simple agreement = 68.3%, kappa = 0.341, and p = 0.014. Sixteen of 60 (26.7%) contrast-enhanced MDCT scans were positive prospectively, with all accurately localizing the site of bleeding and identification of the underlying lesion in eight of 16 (50%). Nineteen of 41 (46.3%) (99m)Tc-labeled RBC scans were positive. Eighteen of 41 matched patients went on to angiography. In four of these 18 (22.2%) patients, the site of bleeding was confirmed by angiography, but in 14 of 18 (77.8%), the findings were negative. CONCLUSION: Contrast-enhanced MDCT and (99m)Tc-labeled RBC scanning show significant disagreement for evaluation of active lower gastrointestinal bleeding. Contrast-enhanced MDCT appears effective for detection and localization in cases of active lower gastrointestinal bleeding in which hemorrhage is active at the time of CT.

Expanding the range of therapies for acute ischemic stroke: the early experience of the Regional Stroke Center at Hartford Hospital.

PURPOSE: Three to four percent of all patients with acute ischemic stroke (AIS) receive the only FDA-approved therapy, intravenous tissue plasminogen activator. We sought to assess the impact of a regional stroke program, the Stroke Center at Hartford Hospital, in facilitating various therapies for patients with AIS, and their early outcomes. METHODS: For a 34-month period (May 2001 to February, 2004), 113 patients received either i.v. and/or intra-arterial thrombolysis, or an experimental protocol as a therapy for AIS. The Hartford Hospital and Stroke Center databases were queried for the diagnosis of AIS using ICD-9 codes, site of patient presentation, transportation modality, stroke severity, and clinical outcome. RESULTS: The percentage of patients with AIS treated has increased each of the past five fiscal years, to 15.4% for fiscal year 2004 to date. This growth is paralleled by increases in mean annual stroke severity of all stroke patients admitted to Hartford Hospital and in the numbers of patients transferred with AIS from other hospitals in southern New England. Symptomatic hemorrhage rate for the 113 patients was 5.3%. In-hospital mortality rate was 25.7%. Most patients (56.6%) were discharged from Hartford Hospital either to home or to acute rehabilitation. CONCLUSIONS: A regional stroke program greatly facilitated acute stroke treatment interventions. We attribute this growth to widespread educational programming, an Acute Stroke Team, catheter-based therapies with a dedicated Interventional Neuroradiology service, a 1800 Acute Stroke Hotline, and clinical trials.