Role of sodium bicarbonate in the management of acute upper gastrointestinal bleeding
Sodium bicarbonate has previously been reported to have effects on blood clot formation both in vitro and in vivo. It is thought that sodium bicarbonate interferes with fibrin clot formation  . We describe our experience with two patients with upper gastrointestinal (GI) bleeding in whom sodium bicarbonate was used to improve visualization, thus allowing definitive control of the bleeding.
Case 1 was a 29-year-old man with a complex past medical history including single morphologic right ventricle, unbalanced right dominant atrioventricular septal defect, and D-transposed great arteries who was admitted to our facility. The patient was noted to have coffee-ground emesis and hematochezia. Because of concerns about upper GI bleeding, the gastroenterology department was asked to perform endoscopic evaluation at the bedside. Visualization of the underlying mucosa was difficult owing to a large adherent clot ([Fig. 1 a]; [Video 1], time 00:26). Subsequent irrigation with sterile water over the next 2 hours failed to improve visualization. A total of 100 mL of 8.4 % sodium bicarbonate solution was applied intermittently with subsequent improvement in visualization ([Fig. 1 b]). Following this process, a Dieulafoy lesion was identified and was managed with epinephrine and hemostatic clips ([Fig. 1 c]).
Video 1 Use of sodium bicarbonate solution in the management of two patients with acute upper gastrointestinal bleeding.
Case 2 was a 3-year-old boy with a past medical history of disseminated medulloblastoma, for which he had undergone gross total resection and craniospinal radiation, who presented with hematemesis. Upper GI endoscopy was performed urgently. Visual findings were significant for a flat, pigmented ulcer at the level of the gastroesophageal junction ([Video 1], time 01:40). Hemostasis was not performed given lack of stigmata of recent bleeding. Approximately 48 hours after the initial procedure, the patient was noted to have a drop in hemoglobin from 10 to 5 g/dL. The patient was again taken to operating room for endoscopic evaluation. As the endoscope was passed into the stomach, a large clot was found to be obscuring the previously noted ulcer base ([Fig. 2 a]). Epinephrine was injected at the periphery of the ulcer and sodium bicarbonate was then used topically to dissolve the clot. Following multiple rounds of irrigation with sodium bicarbonate and sterile water, a full view of the ulcer bed was obtained ([Fig. 2 b]). There did not appear to be any additional bleeding. A total of 40 mL of 8.4 % sodium bicarbonate solution (1 meq/mL) were used in aliquots of 4 – 10 mL without any immediate side effects.
Prior cases have documented the use of sodium bicarbonate for severe clot retention in the bladder; to our knowledge, this is the first report to describe its use in the management of a GI bleed . This was particularly advantageous given poor visualization and concern for clot instability. While caution should be exercised owing to the anticoagulant properties of sodium bicarbonate, this technique can be a useful modality combined with traditional methods of hemostasis .
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