Hemorrhaging: Hematochezia (rectal bleeding) -Treatments and Managements

Hemorrhaging is also known as bleeding or abnormal bleeding as a result of blood loss due to internal.external leaking from blood vessels or through the skin.
Hematochezia (rectal bleeding)
Hematochezia is defined as a condition of the passage of bright red, bloody stool. In most cases it is an indication of hemorrhoids (swollen veins in and around the rectum) or diverticulitis, a common digestive disease particularly found in the large intestine, as a result of infection or inflammation.
Treatments and managements
5.1. Severe hematochezia
In the study to  evaluate (a) the diagnosis and treatment of 80 consecutive patients with severe, ongoing hematochezia from unknown source and (b) the effectiveness and safety of urgent colonoscopy after oral purge, researcher wrote that because of ongoing severe hematochezia in the intensive care unit, urgent diagnosis and treatment was recommended by the attending physicians and surgeons. Emergency panendoscopy was performed before purge. Urgent colonoscopy was performed in the intensive care unit after patients received oral purge and their gut was cleared of blood, clots, and stool. The final diagnosis in these patients was 74% colonic lesions (30% angiomata, 17% diverticulosis, 11% polyps or cancer, 9% focal ulcers, 7% other), 11% upper gastrointestinal lesions, and 9% presumed small bowel lesions. No lesion site was identified in 6%. Clinically significant fluid retention (medically controlled) occurred in 4% of patients after purge. Sixty-four percent of patients had intervention for control of bleeding: 39% had therapeutic endoscopy, 24% surgery, and 1% therapeutic angiography. For 22 patients who also had emergency visceral angiography, the diagnostic yield was 14% and the complication rate was 9%. and suggested that (a) Oral purge was effective and safe for cleansing the colon of stool, clots, and blood. Sulfate purge appeared to be safer than saline purge. (b) Before urgent colonoscopy and purge, emergency panendoscopy was indicated to exclude an upper gastrointestinal bleeding source. (c) Urgent colonoscopy after purge was effective, safe, and often diagnostic. (d) Compared with urgent colonoscopy, urgent visceral angiography was often nondiagnostic. However, the examinations may be complementary. (e) Hemostasis via colonoscopy has a definitive role in the treatment of some focal colonic lesions such as bleeding angiomata(15).

5.2. In Stable patients 
In the study of to examine 58 patients, presenting with clinical signs of lower GI hemorrhage,  through a 24-month period. Preliminary endoscopy was either negative or unfeasible. Images were obtained with a four-detector row CT with an arterial (4 x 1 mm collimation, 0.8 mm increment, 1.25 mm slice width, 120 kV, 165 mAs) and portal venous series (4 x 2,5 mm collimation, 2 mm increment, 3 mm slice width, 120 kV, 165 mAs). Time interval between endoscopy and CT varied between 30 minutes and 3 hours. The results of the multi-phase Multi-Slice-Computertomography (MSCT) were correlated with clinical course and surgical or endoscopical treatment(16).
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Sources
(15) http://www.ncbi.nlm.nih.gov/pubmed/3263294
(16) http://www.ncbi.nlm.nih.gov/pubmed/16333787