Hemosuccus Pancreaticus as a Rare Cause of Gastrointestinal Bleeding: a Report of Two Cases

Pancreatic diseases are known to be associated with complications such as pseudocyst and abscess. A pseudoaneurysm associated with pancreatitis may develop as well. The pseudoaneurysm may rupture into various parts of the gastrointestinal tract; the peritoneal cavity, or the retroperitoneum. We report two cases of Hemosuccus pancreaticus admitted to our center in the past five years. One case was associated with acute pancreatitis, and another case was associated with chronic pancreatitis. A pseudocyst was found in two cases. Both were successfully managed by emergency surgery. So, Hemosuccus pancreaticus is a rare cause of gastrointestinal bleeding with difficult diagnosis, and surgery is the effective treatment for the patient with severe bleeding. However in cases with no life-threatening bleeding angiography and embolization can be performed

Problems in Colorectal Stapler Use

Introduction Pneumatosis intestinalis (PI) is a broad term that describes the presence of gas in the bowel walls. The colon is affected in 36% of cases. Eosinophilic colitis (EC) is a rare form of colitis that is characterized mainly by eosinophilia in blood and affected tissues. Although eosinophilic colitis responds well to conservative treatment, yet the association of PI could be an indication of emergent surgery. Case Presentation A 48-year-old female patient with a history of recurrent attacks of abdominal pain and distention that did not respond to conservative treatment, was hospitalized and investigated thoroughly. The result of abdominal computed tomography (CT) scan indicated the presence of pneumatosis coli. Based on the findings of the CT scan, colonoscopy was done revealing hyperemic and hypertrophied mucosa at the hepatic flexure, from which multiple punch biopsies were taken for histopathological assessment. The pathological examination of these biopsies detected a diffuse active colitis of moderate severity with excess eosinophils (10 - 15/HPF), which is consistent with the diagnosis of EC. The patient improved dramatically on fluid therapy and antibiotics with complete resolution of pneumatosis coli in the follow up CT scan. However, the patient developed a severe relapse of symptoms once oral intake was resumed and this time the conservative treatment failed to improve the condition. Surgery was indicated and laparoscopic right hemicolectomy with primary anastomosis and covering ileostomy was done. The patient was free of symptoms after the operation and her postoperative course was uneventful with no complications encountered. Conclusions Eosinophilic colitis usually has a good prognosis, however its association with pneumatosis coli could reflect a serious damage to the colonic mucosa. Although eosinophilic colitis responds well to medical treatment, yet in certain cases where clinical signs are evident and pneumatosis coli is present, surgical intervention is the treatment of choice

Modeling and simulation of membrane separation process using computational fluid dynamics

Separation of CO2 from air was simulated in this work. The considered process for removal of CO2 was a hollow-fiber membrane contactor and an aqueous solution of 2-amino-2-metyl-1-propanol (AMP) as absorbent. The model was developed based on mass transfer as well as chemical reaction for CO2 and solvent in the contactor. The equations of model were solved using finite element method. Simulation results were compared with experimental data, and good agreement was observed. The results revealed that increasing solvent velocity enhances removal of CO2 in the hollow-fiber membrane contactor. Moreover, it was found that counter-current process mode is more favorable to achieve the highest separation efficiency