Index C-reactive protein predicts increased severity in acute sigmoid diverticulitis.

PURPOSE: Conservative management is successful in unperforated (Hinchey Ia) acute diverticulitis (AD) and also generally in local perforation or small abscesses (Hinchey Ib). A higher degree of radiological severity (Hinchey >Ib), ie, a larger abscess (>3-4 cm) or peritonitis, commonly requires percutaneous drainage or surgery. Retrospective studies show that high levels of C-reactive protein (CRP) distinguish Hinchey Ia from all cases of minor and major perforations (Hinchey >Ia). The current study aims to evaluate the usefulness of CRP in distinguishing AD with a higher degree of severity (Hinchey >Ib) from cases that can be treated noninvasively (Hinchey Ia/Ib). METHODS: Data from consecutive patients with AD were collected prospectively. All underwent computed tomography (CT). Index parameters obtained at the initial evaluation at the emergency unit were analyzed to assess the association with the outcome. The exclusion criteria comprised concomitant conditions that affected CRP baseline levels. RESULTS: Ninety-nine patients were analyzed. Eighty-eight had mild radiological grading (Hinchey Ia/Ib), and 11 had severe radiological grading (Hinchey >Ib) (median index CRP 80 mg/L vs 236 mg/L [P<0.001]). White blood cells, neutrophils/lymphocytes, serum creatinine, serum glucose, generalized peritonitis, generalized abdominal tenderness, urinary symptoms, and index CRP were related to severe disease. Index CRP was the only independent predictor for Hinchey >Ib (P=0.038). The optimal cutoff value calculated by receiver operating characteristic curve analysis was found to be 173 mg/L (sensitivity 90.9%, specificity 90.9%, P<0.001). All patients who underwent radiological drainage or surgery had an index CRP >173 mg/L and Hinchey >Ib. CONCLUSION: CRP levels >173 mg/L obtained at the initial evaluation at the emergency unit predict major acute complications in AD. These patients commonly require urgent percutaneous drainage or surgical management.

Does tissue ischemia actually contribute to leak after sleeve gastrectomy? An experimental study.

BACKGROUND: Staple line leak, although rare, is among the most common postoperative complications after sleeve gastrectomy (SG) and usually occurs in the gastroesophageal (GE) junction. Increased intragastric pressure, regional ischemia, and technical failure of stapling devices have been reported as the main risk factors of postoperative leak. The aim of this study was to evaluate the impact of ischemia and intraluminal pressure in leak appearance. METHODS: Landrace swine (n = 12) were subjected to SG and total gastrectomy subsequently. Lactic acid, glycerol, and pyruvate were measured by microdialysis in GE junction and pylorus before and nine times after operation, and lactate/pyruvate (L/P) ratio was calculated as well. Moreover, ex vivo air was insufflated inside the tubularized stomach till a rupture of the staple line occurs. Maximum air pressure reached and location of rupture were recorded. RESULTS: Increase of lactic acid and L/P ratio were demonstrated in GE junction measurements; however, when the measurements between GE junction and pylorus were compared, no statistically significant differences were found, with the exception of a slightly increased lactate concentration in pylorus in the midst of measurements. The maximum air pressure recorded varied from 3 to 75 mmHg (mean 24.5 mmHg) and the majority of ruptures (n = 8) occurred in GE junction. In one of them, clip displacement was noticed. CONCLUSIONS: No evidence of increased ischemia in GE junction compared to pylorus was recorded. Increased intraluminal pressure and stapling malfunction may play the most important role in leak appearance.

Laparoscopic common bile duct exploration after failed endoscopic stone extraction.

BACKGROUND: Our objective was to present the technical aspects and results of laparoscopic common bile duct (CBD) exploration following failed endoscopic stone extraction. METHOD: From April 1997 to December 2006, 32 patients were referred to us after unsuccessful attempts at endoscopic CBD stone extraction. Transcholedochal laparoscopic CBD exploration was used in all patients. Previous operations, several pathologic entities, and stone impaction were studied as potential predictors of failure of the laparoscopic approach. RESULTS: Previous operations, cholangitis, anatomic abnormalities, and stone impaction were the principal reasons for failure of endoscopic retrograde cholangiopancreatography (ERCP). Stone extraction under direct laparoscopic choledochotomy was achieved in 20 of 31 patients (64.51%). Biliary stents were inserted in 7 patients (21.8%) and T tubes were placed in 21 patients (65.6%). Five laparoscopic choledochoduodenostomies were performed. There were 11 conversions to open surgery. Morbidity was 12.5%. CONCLUSIONS: Laparoscopic choledochotomy is an efficacious procedure in dealing with unsuccessful endoscopic CBD clearance.

Perioperative erythropoietin administration in patients with gastrointestinal tract cancer: prospective randomized double-blind study.

OBJECTIVE: To investigate the effect of recombinant human erythropoietin (r-HuEPO) administration on perioperative hemoglobin concentrations and on the number of blood transfusions in patients undergoing surgery for gastrointestinal tract malignancies. SUMMARY BACKGROUND DATA: Erythropoietin has been shown to improve the yield of autologously predonated blood and to reduce the subsequent requirements for homologous blood transfusions in cancer patients. METHODS: In this double-blind placebo-controlled study, 31 cancer patients received subcutaneous r-HuEPO in a dose of 300 IU/kg body weight plus 100 mg iron intravenously (study group) and 32 patients received placebo medication and iron (control group). All patients received the medications daily for at least 7 days before and 7 days after the operation. RESULTS: Patients who received erythropoietin received significantly fewer transfusions intraoperatively and postoperatively. Postoperatively, the study group had significantly higher hematocrit, hemoglobin, and reticulocyte count values compared to the control group. The use of erythropoietin was also associated with a reduced number of postoperative complications and improved 1-year survival. CONCLUSIONS: Patients with gastrointestinal tract cancer and mild anemia benefit from perioperative erythropoietin administration in terms of stimulated erythropoiesis, reduction in the number of blood transfusions, and a favorable outcome.