t-PA power-pulse spray with rheolytic mechanical thrombectomy using cross-sectional image-guided portal vein access for single setting treatment of subacute superior mesenteric vein thrombosis

A clinical analysis of intestinal mucosal necrosis and exfoliation induced by superior mesenteric vein thrombosis: A case report

Background

Superior mesenteric vein (SMV) thrombosis is a rare intestinal ischemic disease. The clinical manifestations of patients differ, and most experience gastrointestinal symptoms.

Case summary

A 45-year-old female patient presented with persistent abdominal pain and abnormal vaginal bleeding for 7 days. A physical examination revealed significant abdominal tenderness with positive rebound tenderness. A laboratory examination revealed a white blood cell count of 27 × 10⁹/l, hemoglobin level of 52 g/L, and D-dimer of 4.54 mg/l. Enhanced computed tomography revealed a thickening and swelling of the jejunum and ileum in the left upper quadrant and portal vein. Filling defects in the main lumen and branch lumen suggested the possibility of portal vein and superior mesenteric vein thrombosis. Symptoms improved after treatment with low-molecular-weight heparin and warfarin. One month later, the patient developed occasional dull pain in the left lower quadrant, with long strips of discharge. An electronic colonoscopy revealed avascular necrosis and tissue exfoliation of the intestinal mucosa. After the continuation of warfarin therapy, the abdominal pain resolved. Five months later, the patient experienced recurrent abdominal pain and vomiting. A physical examination revealed a blood pressure of 75/49 mm Hg. An incomplete ileus with the portal and superior mesenteric vein thrombosis was diagnosed, partial jejunectomy and gastrointestinal bypass anastomosis were performed, and warfarin was continued postoperatively.

Conclusion

The intestinal mucosal shedding observed, in this case, was caused by SMV thrombosis, which enriched the clinical manifestations of the disease and provided a new basis for the clinical diagnosis of SMV thrombosis.

Transhepatic Pharmacomechanical Thrombectomy of Symptomatic Acute Noncirrhotic, Nonmalignant Portomesenteric Venous Thrombosis: Midterm Results

OBJECTIVE. The purpose of this study was to evaluate the safety and efficacy of transhepatic pharmacomechanical thrombectomy of symptomatic acute portomesenteric venous thrombosis. MATERIALS AND METHODS. Transhepatic pharmacomechanical thrombectomy (catheter-directed thrombolysis with mechanical thrombectomy) was performed in the treatment of nine patients with symptomatic acute noncirrhotic, nonmalignant porto-mesenteric venous thrombosis. The medical records, imaging examinations, technique of transhepatic pharmacomechanical thrombectomy, and clinical outcomes were reviewed. RESULTS. The mean follow-up period was 23.1 months (range, 8-34) months. Successful recanalization of the portomesenteric venous thrombosis, restoration of hepatopetal portal flow, clinically significant improvement in the signs and symptoms of acute mesenteric ischemia, and prevention of bowel resection were achieved in all patients. The most frequent minor complication (in three patients) was minor hemorrhage through the transhepatic access track. No procedure-related major complications occurred during hospitalization. No patient had rethrombosis or complications related to portal hypertension due to portomesenteric venous thrombosis. One patient died of massive pulmonary embolism on the 7th day after treatment. Cavernous transformation of the right portal vein occurred in one patient. CONCLUSION. Transhepatic pharmacomechanical thrombectomy is a safe and effective method of treatment of symptomatic acute portomesenteric venous thrombosis and prevention of bowel infarction.

Percutaneous Pharmaco-Mechanical Thrombectomy of Acute Symptomatic Superior Mesenteric Vein Thrombosis

Purpose

To evaluate the safety and the efficacy of percutaneous pharmaco-mechanical thrombectomy (PPMT) of acute superior mesenteric vein (SMV) thrombosis.

Methods

A database of patients treated between 2011 and 2018 with acute venous mesenteric ischemia (VMI) was reviewed. VMI was diagnosed in the presence of SMV thrombosis and CT evidence of jejunal thickening. All patients presented with mild to moderate peritonism, which allowed surgery to be postponed. Initial treatment consisted of heparinization. PPMT was indicated in case of worsening abdominal pain despite anticoagulation and was performed via a transjugular or transhepatic approach, using a rotational aspiration thrombectomy catheter, followed by transcatheter thrombolysis. Clinical success was defined as symptoms resolution. Technical success was defined as patency of > 50% of SMV at venography and resolution of jejunal thickening. Patients were discharged on lifelong oral anticoagulation (INR 2.5–3.5). Follow-ups were performed using CT and color Doppler ultrasound.

Results

Population consisted of eight males, aged 37–81 (mean 56.5 years). Causes for thrombosis were investigated. Urokinase infusion time ranged from 48 to 72 h (3,840,000–5,760,000 IU). Clinical and technical success was obtained in all cases. One patient experienced bleeding from the superior epigastric artery and was treated with embolization. One patient died of multi-organ failure after 35 days, despite resolution of SMV thrombosis. In no case was surgery required after PPMT; mean hospitalization was 14.1 days (9–24). Mean follow-up of remaining seven patients was 37.7 months (12–84 months).

Conclusion

PPMT of acute SMV thrombosis seems safe and effective, with an 87.5% long-term survival rate and a 12.5% major complication rate.