Background. Colonic malignant obstruction and perforated diverticulitis are acute left sided colonic emergencies (ALSCE) that are typically managed with colorectal resection. Colonic preservation techniques such as la...Background. Colonic malignant obstruction and perforated diverticulitis are acute left sided colonic emergencies (ALSCE) that are typically managed with colorectal resection. Colonic preservation techniques such as laparoscopic lavage and endoscopic stenting have emerged as management options, the safety of which has been debated. We aimed to determine if these alternate colonic preservation techniques result in increased in-hospital mortality. Materials and Methods. Retrospective analysis of prospectively collected data of 210 patients with ALSCE managed from June 2001 to April 2014. Data collected included demographic, pathology type, ASA grading, operative and post-operative progress. Univariable and multivariable logistic regression was performed to determine factors contributing to treatment arm allocation and in-hospital mortality. These were performed on the whole treatment cohort, as well as per pathology subgroup. Results. 210 patients were included. Non-resectional management was attempted in 147 patients (70%), of which 38 (26%) required un-planned colonic resection or died in hospital. Those treated with colonic preservation were younger, had lower ASA scores and had lower Hinchey scores (in the diverticular perforation group) than those in the resection group. Female gender was the only independent predictor of increased in-hospital mortality risk. Importantly, the type of procedure performed (colonic preservation vs. resection) did not predict in-hospital mortality risk. Conclusion. Attempted colonic preservation strategies do not increase the risk of in-hospital mortality in patients presenting with ALSCE. Given the inherent benefits of colonic preservation, these treatment strategies should be considered when managing ALSCE.展开更多
AIM： To investigate whether hepatocytes isolated from macroscopically normal liver during hepatic resection for neoplasia could provide a novel source of healthy hepatocytes, including the development of reliable pro...AIM： To investigate whether hepatocytes isolated from macroscopically normal liver during hepatic resection for neoplasia could provide a novel source of healthy hepatocytes, including the development of reliable protocols for malignant cells removal from the hepatocyte preparation. METHODS： Hepatocytes were procured from resected liver of 18 patients with liver tumors using optimised digestion and cell-enrichment protocols. Suspensions of various known quantities of the HT-29 tumor cell line and patient hepatocytes were treated or not with Ep-CAM-antibody-coated immunomagnetic beads in order to investigate the efficacy of tumor-purging by immunomagnetic depletion, using a semi-quantitative RT-PCR method developed to detect tumor cells. Immunomagnetic bead-treated or bead-untreated tumor cell-hepatocyte suspensions were transplanted intra-peritoneally in Balb/C nude mice to assess the rates of tumor development. RESULTS： Mean viable hepatocyte yield was 9.3×10^6 cells per gram of digested liver with mean viability of 70.5%. Immunomagnetic depletion removed tumor cells to below the RT-PCR detection-threshold of 1 tumor cell in 10^6 hepatocytes, representing a maximum tumor purging efficacy of greater than 400000-fold. Transplanted, immunomagnetic bead-purged tumor cell-hepatocyte suspensions did not form peritoneal tumors in Balb/C nude mice. Co-transplantation of hepatocytes with tumor cells did not increase tumorigenesis of the tumor cells. CONCLUSION： Immunomagnetic depletion appears to be an effective method of purging contaminating tumor cells to below threshold for likely tumorigenesis. Along with improved techniques for isolation of large numbers of viable hepatocytes, normal liver resected for neoplasia has potential as another clinically useful source of hepatocytes for transplantation.展开更多
文摘Background. Colonic malignant obstruction and perforated diverticulitis are acute left sided colonic emergencies (ALSCE) that are typically managed with colorectal resection. Colonic preservation techniques such as laparoscopic lavage and endoscopic stenting have emerged as management options, the safety of which has been debated. We aimed to determine if these alternate colonic preservation techniques result in increased in-hospital mortality. Materials and Methods. Retrospective analysis of prospectively collected data of 210 patients with ALSCE managed from June 2001 to April 2014. Data collected included demographic, pathology type, ASA grading, operative and post-operative progress. Univariable and multivariable logistic regression was performed to determine factors contributing to treatment arm allocation and in-hospital mortality. These were performed on the whole treatment cohort, as well as per pathology subgroup. Results. 210 patients were included. Non-resectional management was attempted in 147 patients (70%), of which 38 (26%) required un-planned colonic resection or died in hospital. Those treated with colonic preservation were younger, had lower ASA scores and had lower Hinchey scores (in the diverticular perforation group) than those in the resection group. Female gender was the only independent predictor of increased in-hospital mortality risk. Importantly, the type of procedure performed (colonic preservation vs. resection) did not predict in-hospital mortality risk. Conclusion. Attempted colonic preservation strategies do not increase the risk of in-hospital mortality in patients presenting with ALSCE. Given the inherent benefits of colonic preservation, these treatment strategies should be considered when managing ALSCE.
文摘AIM： To investigate whether hepatocytes isolated from macroscopically normal liver during hepatic resection for neoplasia could provide a novel source of healthy hepatocytes, including the development of reliable protocols for malignant cells removal from the hepatocyte preparation. METHODS： Hepatocytes were procured from resected liver of 18 patients with liver tumors using optimised digestion and cell-enrichment protocols. Suspensions of various known quantities of the HT-29 tumor cell line and patient hepatocytes were treated or not with Ep-CAM-antibody-coated immunomagnetic beads in order to investigate the efficacy of tumor-purging by immunomagnetic depletion, using a semi-quantitative RT-PCR method developed to detect tumor cells. Immunomagnetic bead-treated or bead-untreated tumor cell-hepatocyte suspensions were transplanted intra-peritoneally in Balb/C nude mice to assess the rates of tumor development. RESULTS： Mean viable hepatocyte yield was 9.3×10^6 cells per gram of digested liver with mean viability of 70.5%. Immunomagnetic depletion removed tumor cells to below the RT-PCR detection-threshold of 1 tumor cell in 10^6 hepatocytes, representing a maximum tumor purging efficacy of greater than 400000-fold. Transplanted, immunomagnetic bead-purged tumor cell-hepatocyte suspensions did not form peritoneal tumors in Balb/C nude mice. Co-transplantation of hepatocytes with tumor cells did not increase tumorigenesis of the tumor cells. CONCLUSION： Immunomagnetic depletion appears to be an effective method of purging contaminating tumor cells to below threshold for likely tumorigenesis. Along with improved techniques for isolation of large numbers of viable hepatocytes, normal liver resected for neoplasia has potential as another clinically useful source of hepatocytes for transplantation.
