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Bowel Ischemia clinical trials

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NCT ID: NCT04709445 Recruiting - Ulcerative Colitis Clinical Trials

Perfusion Rate Assessment by Near-infrared Fluorescence in Gastrointestinal Anastomoses

Start date: March 1, 2020
Phase: N/A
Study type: Interventional

In this prospective, non-randomized cohort study, real-time intraoperative visualization using near-infrared-fluorescence by indocyanine green injection (ICG-NIRF) is performed at two to three time points during procedures of upper GI, lower GI and hepatobiliary surgery with anastomosis formation in open or laparoscopic surgery. Postoperatively, a detailed software-based assessment of each recording is performed to determine the objective ICG-NIRF perfusion rate before and after anastomosis formation, which is then correlated with the 30 day postoperative clinical outcome including occurrence of anastomotic leak.

NCT ID: NCT04561323 Recruiting - Bowel Ischemia Clinical Trials

Diagnosing Acute Onset Insufficient Intestinal Blood Flow (Bowel Ischemia) With a Novel CT Technique Called Dual-energy CT (DECT). This Observational Study Seeks to Evaluate Whether DECT Can Improve the Diagnosis of Bowel Ischemia and How the DECT Findings Correlate With Intraoperative Findings

Start date: November 1, 2020
Study type: Observational

The aim of this study is to evaluate the performance of dual-energy CT (DECT) in the diagnosis of acute bowel ischemia (ABI). ABI is a condition characterised by inadequate blood supply to portions of the intestine. ABI is a relatively rare condition, but is associated with a high mortality rate. DECT is an emerging field within radiology. Few reports have reported an increased conspicuity for ABI using DECT compared with conventional CT, which is the current preoperative golden standard. The investigators hypothesize that DECT increases conspicuity of ABI compared with conventional CT and that DECT image findings correlate with the intraoperative findings.

NCT ID: NCT03395483 Completed - Colorectal Surgery Clinical Trials

Peripheral and Mesenteric Perfusion in Elective Surgical Patients

Start date: April 10, 2018
Study type: Observational

An important goal of haemodynamic monitoring and resuscitation is early detection of insufficient tissue perfusion and oxygenation. The mesenteric haemodynamic response to circulatory shock is complex, and diagnosis of bowel ischaemia poses significant difficulty. Assuming blood flow is diverted from the peripheral tissue and the gastrointestinal tract to vital organs, during circulatory shock, an objective, simple and non-invasive method of detecting peripheral tissue perfusion impairment might detect this at an early stage. The peripheral perfusion index (PPI) reflects changes in peripheral perfusion and laser doppler flowmetry allows measurement of bowel tissue perfusion. The aim of this study is to explore the association between changes in peripheral and intestinal perfusion in patients undergoing elective colorectal surgery exposed to intraoperative haemodynamic challenges.