Chronic pancreatitis--lessons learned.
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Chronic Disease↗
Biomedical subjects
E F Yekebas
Publications and source records attributed to E F Yekebas.
[Recurrent intestinal bleeding in a patient with arterio-venous fistulas in the small bowel, limited mesenteric varicosis without portal hypertension and malrotation type I].
A case of vascular malformations of the small intestine associated with malrotation Type I of the right colon is reported. Representing rare conditions, vascular malformations in the small bowel are not accessible endoscopically. Therefore, gastrointestinal haemorrhage originating from this "terra incognita" is difficult to diagnose. Our patient had a medical history of anaemia of 17 years before admitted to our hospital. After a preoperative blood pool scan had evidenced the bleeding source in the proximal jejunum, the patient underwent explorative laparotomy. The bleeding source was identified and resection of a jejunal segment was performed. Intraoperatively, malrotation type I was found. Histological examination revealed angiodysplasia extending full thickness of the intestinal wall with predominance in the submucosa and serosa. Secondary arterialisation was seen in the vessels of the serosa resembling varicosis-like lesions at gross inspection. The patient did not suffer from portal hypertension. Postoperative course was uneventful and no further bleeding occurred.
Adult↗
Attenuation of sepsis-related immunoparalysis by continuous veno-venous hemofiltration in experimental porcine pancreatitis.
OBJECTIVES: In light of evidence suggesting that hemofiltration favorably influences septic diseases by removing sepsis mediators, the impact of different modalities of continuous veno-venous hemofiltration (CVVH) on outcome and immunologic derangements in porcine pancreatogenic sepsis was evaluated. DESIGN: Randomized, controlled intervention trial. SUBJECTS: Forty-eight minipigs of either sex. INTERVENTIONS: Pancreatitis was induced by intraductal injection of sodium taurocholate (4%, 1 mL/kg body weight [BW]) and enterokinase (2 U/kg BW). Animals were allocated either to untreated controls-group 1-or to one of three treatment groups-group 2: low-volume CVVH (20 mL/kg BW), no change of hemofilters; group 3: low-volume CVVH, filters changed every 12 hrs; and group 4: high-volume CVVH (100 mL/kg BW), filters changed every 12 hrs. Survival represented the major parameter of the study. Serum cytokine levels, sepsis-related down-regulation of major histocompatibility complex II and CD14 expression on leukocytes, bacterial translocation, and endotoxemia were further parameters evaluated in the study. MEASUREMENTS AND MAIN RESULTS: High-volume CVVH combined with periodic filter change was significantly superior compared with less intensive treatment modalities (low-volume CVVH, no filter change) in sepsis protection. Long-term survival (>60 hrs) was found in 67% of group 4 and 33% of group 3 animals (p <.05), whereas in controls and group 2 no animal survived. CVVH ameliorated the initial serum tumor necrosis factor-alpha response and prevented sepsis-induced in vitro endotoxin hyporesponsiveness. Down-regulation of major histocompatibility complex II and CD14 expression on monocytes was significantly improved by CVVH. Improved oxidative burst and phagocytosis capacity in polymorphonuclear leukocytes suggested that leukocyte function was stabilized by CVVH. Also, CVVH significantly reduced bacterial translocation and endotoxemia. CONCLUSIONS: Hemofiltration reversed sepsis-induced immunoparalysis in a porcine model of bile acid-induced pancreatitis. Implications for human pancreatitis must be validated in prospective, clinical protocols.
Acute Disease↗
Influence of zero-balanced hemofiltration on the course of severe experimental pancreatitis in pigs.
OBJECTIVE: To examine the impact of continuous venovenous hemofiltration (CVVH) on the course of experimental pancreatitis in pigs. SUMMARY BACKGROUND DATA: The activation of different mediator cascades is assumed to trigger multiple organ dysfunction or failure during necrotizing pancreatitis. CVVH has been suggested to be beneficial in those instances by eliminating several inflammatory mediators released in the circulation. METHODS: Pancreatitis was induced by a combined intraductal injection of sodium taurocholate and enterokinase. Control group animals received no treatment after induction. A second group underwent "therapeutic" CVVH after a 20% decline of mean arterial pressure. In the third group, "prophylactic" CVVH was started simultaneously with the induction of pancreatitis. The concentrations of tumor necrosis factor-alpha, transforming growth factor-beta1, kinin, and phospholipase A2 were measured at different time points in blood (pre- and postfilter) and in the hemofiltrate to calculate the respective sieving coefficients that reflect most accurately the plasma clearance of mediators by CVVH. RESULTS: Survival time was significantly prolonged both by therapeutic and prophylactic CVVH; it was more pronounced in the latter. CVVH did not influence the increase in transforming growth factor concentrations. However, 6 hours after induction, the increases of plasma concentrations of tumor necrosis factor, phospholipase, and kinin were significantly weakened by CVVH compared with controls. In the treatment groups, the plasma concentrations of tumor necrosis factor and phospholipase showed a significant negative correlation with the respective sieving coefficients, which decreased in the later course of the experiments. CONCLUSIONS: Experimental necrotizing pancreatitis was associated with a tremendous increase of plasma concentrations of tumor necrosis factor, phospholipase, and kinin. The effective removal of these mediators by CVVH resulted in significantly improved survival time. Animals that received prophylactic CVVH had a longer survival period than those in which CVVH was started after clinical impairment. The decreasing efficiency of CVVH in eliminating inflammatory mediators in the later course of the experiments suggested that the filter membranes were compromised by long-term application. These findings provide further evidence that CVVH offers therapeutic options even in the absence of conventional indications for blood-purifying treatments.
Animals↗
Pancreas-sparing duodenectomy in duodenal pathology: indications and results.
BACKGROUND/AIMS: Pancreas sparing-duodenectomy is an organ-preserving surgical procedure suitable for patients with premalignant or early malignant lesions of the duodenum. The surgical technique is challenging due to the close anatomical relationship between the pancreas and the duodenum. METHODOLOGY: All patients undergoing pancreas-sparing duodenectomy for benign or premalignant condition of the duodenum operated on between 1998 and 2001 were analyzed prospectively. The surgical technique, the hospital course, and complications are described. RESULTS: A total of four patients underwent pancreas sparing-duodenectomy. Two patients experienced an uncomplicated postoperative course. In one patient, after completing the pancreas sparing-duodenectomy, the operation was converted to a Whipple procedure after the intraoperative diagnosis of malignant disease in the fresh frozen section. One patient had a complicated postoperative course with postoperative pancreatitis requiring several reoperations. At follow-up all patients are well, free of recurrence and alive. CONCLUSIONS: Pancreas-sparing duodenectomy is a challenging surgical technique and requires excellent knowledge of the anatomy. Intraoperative fresh-frozen section is mandatory to exclude malignant disease. If performed for appropriate indications, pancreas sparing-duodenectomy offers the potential to preserve the anatomical gastrointestinal passage and the integrity of the pancreas.
Digestive System Surgical Procedures↗
Heterotopic pancreas--clinical presentation and pathology with review of the literature.
BACKGROUND/AIMS: Heterotopic pancreas is usually a silent gastrointestinal malformation, but it may become clinically evident when complicated by chronic inflammation or by growth. METHODOLOGY: We report on eleven cases of heterotopic pancreatic tissue. The cases were selected from the records of our Surgical Department and Institute of Pathology. The literature about heterotopic pancreas is reviewed. RESULTS: Nausea and vomiting (27%), epigastric pain (27%), ulceration (27%) and weight loss (18%) were the three most frequent symptoms and signs. The lesions were diagnosed as gastrointestinal tumor or ulcer by gastroduodenoscopy (36%). The other patients were diagnosed during surgery (64%). Definitive diagnosis was only achievable by pathology. Heterotopic pancreas was the reason for surgery in 36% of the cases, in another 45% diagnosis was incidental during surgery and in 18% the diagnosis was established endoscopically and surgery was not necessary. CONCLUSIONS: The diagnosis of heterotopic pancreas is rarely established, most cases remain clinically silent. In symptomatic patients diagnosis should to be secured histologically to exclude malignant disease.
Adult↗