BackroundOpen or laparoscopic colorectal surgery comprises of many different types of procedures for various diseases. Depending upon the operation and modifiable and non-modifiable risk factors the intra- and postoperative morbidity and mortality rate vary. In general, surgical complications can be divided into intraoperative and postoperative complications and usually occur while the patient is still in the hospital.MethodsA literature search (1980-2009) was carried out, using MEDLINE, PubMed and the Cochrane library.ResultsThis review provides an overview how to identify and minimize intra- and postoperative complications. The improvement of different treatment strategies and technical inventions in the recent decade has been enormous. This is mainly attributable to the increase in the laparoscopic approach, which is now well accepted for many procedures. Training of the surgeon, hospital volume and learning curves are becoming increasingly more important to maximize patient safety, surgeon expertise and cost effectiveness. In addition, standardization of perioperative care is essential to minimize postoperative complications.ConclusionThis review summarizes the main perioperative complications of colorectal surgery and influencable and non-influencable risk factors which are important to the general surgeon and the relevant specialist as well. In order to minimize or even avoid complications it is crucial to know these risk factors and strategies to prevent, treat or reduce intra- and postoperative complications.

Genes in the KCNE family encode single transmembrane domain ancillary subunits that co-assemble with voltage-gated potassium (Kv) channel ␣ subunits to alter their function. KCNE2 (also known as MiRP1) is expressed in the heart, is associated with human cardiac arrhythmia, and modulates cardiac Kv ␣ subunits hERG and KCNQ1 in vitro. KCNE2 and KCNQ1 are also expressed in parietal cells, leading to speculation they form a native channel complex there. Here, we disrupted the murine kcne2 gene and found that kcne2 (؊/؊) mice have a severe gastric phenotype with profoundly reduced parietal cell proton secretion, abnormal parietal cell morphology, achlorhydria, hypergastrinemia, and striking gastric glandular hyperplasia arising from an increase in the number of nonacid secretory cells. KCNQ1 exhibited abnormal distribution in gastric glands from kcne2 (؊/؊) mice, with increased expression in non-acid secretory cells. Parietal cells from kcne2 (؉/؊) mice exhibited normal architecture but reduced proton secretion, and kcne2 (؉/؊) mice were hypochlorhydric, indicating a gene-dose effect and a primary defect in gastric acid secretion. These data demonstrate that KCNE2 is essential for gastric acid secretion, the first genetic evidence that a member of the KCNE gene family is required for normal gastrointestinal function.Voltage-gated potassium (Kv) 2 channels repolarize excitable cells by opening in response to membrane depolarization to permit K ϩ ion efflux. In addition to the 40 known genes that encode the pore-forming (␣) subunits of Kv channels (1), a range of Kv channel ancillary subunits form heteromeric complexes with Kv ␣ subunits to alter their functional properties, thus increasing native Kv current diversity. One family of ancillary subunits, the MinK-related peptides (MiRPs, encoded by KCNE genes), contributes five known members to the human genome. MiRPs are single transmembrane domain subunits that co-assemble with Kv ␣ subunits, altering their gating, conductance, regulation, and pharmacology (2).The MiRP1 protein, encoded by the KCNE2 gene, is now more commonly referred to as KCNE2, and this nomenclature is used here to avoid confusion. KCNE2 regulates hERG potassium channels, and KCNE2-hERG complexes are thought, at least in part, to generate the cardiac I Kr current, the major repolarizing force in human ventricles (3). Mutations in KCNE2 are associated with a form of inherited long QT syndrome, LQT6 (3-5). Further, relatively common polymorphisms in KCNE2 are associated with acquired (drug-induced) long QT syndrome, and some KCNE2 variants increase susceptibility to drug block of the I Kr channel complex (3, 6).Aside from interacting with hERG, KCNE2 has been found to modulate other Kv ␣ subunits in heterologous co-expression studies, including KCNQ1 (also known as Kv7.1) (7), Kv3.1, Kv3.2 (8), and Kv4.2 (9). Effects of KCNE2 on KCNQ1 are particularly dramatic: KCNE2 converts KCNQ1 to a voltage-independent "leak" channel that retains K ϩ selectivity but is constitutively active regardless of membrane ...

In 2014, the International Endohernia Society (IEHS) published the first international "Guidelines for laparoscopic treatment of ventral and incisional abdominal wall hernias." Guidelines reflect the currently best available evidence in diagnostics and therapy and give recommendations to help surgeons to standardize their techniques and to improve their results. However, science is a dynamic field which is continuously developing. Therefore, guidelines require regular updates to keep pace with the evolving literature. Methods For the development of the original guidelines, all relevant literature published up to year 2012 was analyzed using the ranking of the Oxford Centre for Evidence-Based Medicine. For the present update, all of the previous authors were asked to evaluate the literature published during the recent years from 2012 to 2017 and revise their statements and recommendations given in the initial guidelines accordingly. In two Consensus Conferences (October 2017 Beijing, March 2018 Cologne), the updates were presented, discussed, and confirmed. To avoid redundancy, only new statements or recommendations are included in this paper. Therefore, for full understanding both of the guidelines, the original and the current, must be read. In addition, the new developments in repair of abdominal wall hernias like surgical techniques within the abdominal wall, release operations (transversus muscle release, component separation), Botox application, and robot-assisted repair methods were included. Results Due to an increase of the number of patients and further development of surgical techniques, repair of primary and secondary abdominal wall hernias attracts increasing interests of many surgeons. Whereas up to three decades ago hernia-related publications did not exceed 20 per year, currently this number is about 10-fold higher. Recent years are characterized by the advent of new techniques-minimal invasive techniques using robotics and laparoscopy, totally extraperitoneal repairs, novel myofascial release techniques for optimal closure of large defects, and Botox for relaxing the abdominal wall. Furthermore, a concomitant rectus diastasis was recognized as a significant risk factor for recurrence. Despite insufficient evidence with respect to these new techniques, it seemed to us necessary to include them in the update to stimulate surgeons to do research in these fields. Conclusion Guidelines are recommendations based on best available evidence intended to help the surgeon to improve the quality of his daily work. However, science is a continuously evolving process, and as such guidelines should be updated about every 3 years. For a comprehensive reference, however, it is suggested to read both the initial guidelines published in 2014 together with the update. Moreover, the presented update includes also techniques which were not known 3 years before.

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This large single center study provides the first evidence of the significance of predictive risk factors for intra- and postoperative complications in laparoscopic colorectal surgery.