A 71-year-old gentleman was referred by his general practitioner with tachycardia. He reported a 2-day history of nausea, abdominal discomfort, and bloating with three episodes of bilious vomiting. He denied any pain, change in bowel habits or infective symptoms. He passed a normal bowel motion on the day of presentation and had no evidence of upper or lower gastrointestinal bleeding. His comorbid medical conditions were hypertension, hypercholesterolaemia and metallic aortic valve replacement. His regular medications included eplerenone, bisoprolol, fenofibrate and warfarin. The patient admitted taking a double dose of warfarin (4 mg daily) for the past 30 days. On arrival in the Emergency Department, his heart rate was 140 b.p.m., however, other haemodynamic parameters were normal. His abdomen was distended but soft and non-tender with active bowel sounds and no peritonism. Other system examinations were unremarkable and he had no stigmata of active bleeding. Electrocardiogram indicated rapid atrial fibrillation, which was managed with intravenous magnesium sulphate and beta blockade followed by an amiodarone infusion. Laboratory results showed a leukocytosis (white cell count 21 × 109/l), normal haemoglobin 152 g/l, elevated C-reactive protein 77 mg/l, lactate 4.6 mmol/l and supratherapeutic international normalized ratio (INR) of 9.9. The patient received urgent surgical review, fluid resuscitation and INR reversal with intravenous vitamin K, prothrombinex and two units of fresh frozen plasma. Bedside abdominal ultrasound indicated intra-abdominal free fluid which was further investigated with a computed tomography (CT) mesenteric angiogram. This showed circumferential, hyperdense bowel wall thickening involving a long segment of small bowel up to the mid-ileum (Fig. ). The bowel wall density was 50–60 Hounsfield units, consistent with an intramural haematoma. The duodenum and the stomach were dilated with no associated transition point and the distal ileum and the colon were decompressed. Haemoperitoneum was noted adjacent to the liver and spleen (Fig. ). Normal contrast enhancement was demonstrated in the major abdominal vasculature. The patient was admitted to the intensive care unit (ICU) for monitoring and non-operative management with bowel rest, nasogastric decompression and intravenous fluids. Warfarin was withheld and no venous thromboembolism prophylaxis administered due to his high bleeding risk. Repeat INR 5 hours after presentation was 1.5. The patient remained haemodynamically stable in ICU with no evidence of active bleeding. He reverted to sinus rhythm after 2 days of amiodarone infusion and did not require surgical intervention or blood transfusion. Diet was progressed and he was transferred to the ward on Day 3. Cardiology advised that the patient was unsuitable for NOAC (new oral anticoagulant) therapy and he was recommenced on warfarin at 1 mg daily. He was discharged on Day 6 with plan for outpatient warfarin titration. On discharge, the patient was asymptomatic, opening his bowels and tolerating full diet with INR 1.2 and stable haemoglobin of 102 g/l.
A 61 year old male with history significant for right lower extremity deep venous thrombosis (DVT); on warfarin 7.5 mg, hypertension, diabetes mellitus, asthma, and chronic kidney disease presented to the emergency department with 3 day history of generalized abdominal pain associated with multiple episodes of nausea, vomiting and obstipation. Patient was awake, alert and oriented. Blood pressure was elevated, rest of vitals were benign. On physical examination, patient had distended abdomen with mild generalized tenderness, no signs of peritonitis. Remainder of his exam was un-remarkable. Labs were significant for INR; >6 and PTT; 91.9. CT abdomen was obtained that showed high grade small bowel obstruction (, ). Patient was admitted under surgical team and initially managed by bowel rest with nil per os(NPO), nasogastric tube to suction showed 1.3 L of bilious fluid, and foley catheter was inserted. Patient was given 6 FFPs to resuscitate in the emergency room. Repeated INR obtained and was found to have 2.16. At this time, patient was taken to the operating room for diagnostic laparoscopy. Intra- operatively, patient was found to have dilated small bowel along with a segment of bowel with intramural and mesenteric hematoma involving 30 cm of the jejunum (, ). Ischemic small bowel with intramural hematoma was resected and anastomosed primarily. Post-operative management in intensive care unit (ICU) was uneventful and patient was discharged home on post op day 5 without any further complications.