Optimisation of perioperative procedural factors to reduce the risk of surgical site infection in patients undergoing surgery: a systematic review.

Surgical site infections (SSI) are the leading cause of hospital readmission after surgical procedures with significant impact on post-operative morbidity and mortality. Modifiable risk factors for SSI include procedural aspects, which include the possibility of instrument contamination, the duration of the operation, the number of people present and the traffic in the room and the ventilation system of the operating theatre.The aim of this systematic review was to provide literature evidence on the relationship between features of surgical procedure sets and the frequency of SSI in patients undergoing surgical treatment, and to analyse how time frames of perioperative processes and operating theatre traffic vary in relation to the features of the procedure sets use, in order tooptimise infection control in OT. The results of the systematic review brought to light observational studies that can be divided into two categories: evidence of purely clinical significance and evidence of mainly organisational, managerial and financial significance. These two systems are largely interconnected, and reciprocally influence each other. The decision to use disposable devices and instruments has been accompanied by a lower incidence in surgical site infections and surgical revisions for remediation. A concomitant reduction in post-operative functional recovery time has also been observed. Also, the rationalisation of traditional surgical sets has also been observed in conjunction with outcomes of clinical significance.

Guidelines for improvement of the procedural aspects of devices and surgical instruments in the operating theatre.

Surgical site infections are a major complication for patients undergoing surgical treatment and a significant cause of mortality and morbidity. Many international guidelines suggest measures for the prevention of surgical site infections (SSI) in perioperative processes and the decontamination of surgical devices and instruments. This document proposes guidelines for improving the perioperative setting in view of the devices and instrumentation required for surgical procedures, aiming to reduce contamination rates and improve clinical performance and management for patients undergoing surgical treatment. This document is intended for doctors, nurses and other practitioners involved in operating theatre procedures, resource management and clinical risk assessment processes, and the procurement, organisation, sterilisation and reprocessing of surgical instruments.

Biosynthetic meshes in contaminated fields: where are we now? A systematic review and meta-analysis in humans.

PURPOSE: Selection of an appropriate mesh reinforcement for hernia repair in contaminated fields is a significant problem for surgeons. To date the proper mesh for contaminated fields has not been found. Biosynthetic meshes have emerged as new treatment option in contaminated fields. This study aims to evaluate the postoperative outcomes of biosynthetic meshes in contaminated fields. METHODS: Systematic electronic search (PubMed, Medline, Embase, Scopus), according to PRISMA criteria, was performed. A literature search of scientific papers was performed by two reviewers until April 2021. Articles were chosen based on reference to biosynthetic meshes, their use in infected fields, and in human subjects. GRADE methodology and the modified Newcastle-Ottawa scale were used to assess the quality of studies. According to CDC-Centers for Disease Control classes patients were divided into two subgroups, group 1 (CDC class 2) and group 2 (CDC classes 3-4). RESULTS: The research included 21 articles and 1619 patients were analyzed. Long-term follow-up showed a significant higher recurrence rate than short-term follow-up. P < 0.001. Meta-analysis of these studies showed that the SSI were significantly higher in CDC classes 3-4 than CDC class 2 (P < 0.01). No differences were found in SSO (P = 0.06) and recurrence (P = 0.37) rate among the two groups. Phasix™ was the most common mesh in 15 studies. The mean follow-up was 23.0 months. The surgical site infection (SSI) rate was 17.3%. The surgical site occurrence (SSO) rate was 32.4%. Recurrence rate was 11.5%. CONCLUSION: This is the first systematic review and meta-analysis on the clinical outcomes of abdominal wall repair using biosynthetic mesh in contaminated-infected settings. The results show good results in patients at high risk of postoperative wound complications. The aim of this study is to add to the growing literature on biosynthetic mesh a picture of current literature evidence to help future researchers performing further studies on this topic.

[Current WSES-AAST guidelines on anorectal emergencies-Summary and comments]. / Aktuelle WSES-AAST-Leitlinie zu anorektalen Notfällen ­ Zusammenfassung und Kommentar.

In 2019, the World Society of Emergency Surgery (WSES) and the American Association for the Surgery of Trauma (AAST) generated consensus recommendations for the treatment of anorectal emergencies in Parma, Italy, and published a guideline in 2021. This is the first global guideline dealing with this important topic for surgeons' everyday work. Seven anorectal emergencies were discussed and the guideline recommendations were given according to the GRADE (Grading of Recommendations Assessment, Development and Evaluation) system.

PROPHYlactic Implantation of BIOlogic Mesh in peritonitis (PROPHYBIOM): a prospective multicentric randomized controlled trial.

BACKGROUND: Patients undergoing emergency surgery for peritonitis are at increased risk of abdominal wall-related complications. In patients with peritonitis, the risk of incisional hernia (IH) is extremely elevated. The evaluation of quality of life of patients with incisional hernia showed lower mean scores on physical components of health-related quality of life and body image. Furthermore, the arise of a post-operative abdominal wall complication (i.e., wound dehiscence, evisceration and IH) greatly increases morbidity and mortality rates and prolongs the hospitalization. METHODS: The present study aims to evaluate the efficacy of the use of a swine dermal collagen prosthesis implanted preperitoneally as a prophylactic procedure in urgency/emergency setting against abdominal wall complications in patients operated with contaminated/infected field in peritonitis. The sample size was defined in 90 patients divided in two arms (prosthesis positioning versus normal wall abdominal closure). The follow-up will be performed at 3, 6, and 12 months after surgery. The percentage of incisional hernias, wound infections, and adverse events will be investigated by physical examination and ultrasound. DISCUSSION: The objective is to evaluate the possibility to reduce the incisional hernia rate in patients undergoing urgent/emergent laparotomy in contaminated/infected field with peritonitis by using swine dermal collagen prosthesis preperitoneal positioning as a prophylactic procedure. TRIAL REGISTRATION: ClinicalTrials.gov NCT04681326. Registered (retrospectively after first patient recruited) on 23 December 2020.

[New WSES-AAST guidelines on trauma of the urogenital tract-Summary and comments]. / Neue WSES-AAST-Leitlinie zum Trauma des Urogenitaltraktes ­ Zusammenfassung und Kommentar.

Different perspectives exist among the various specialist disciplines on the treatment of trauma patients with injuries of the urogenital tract. The multidisciplinary consensus guidelines of the World Society of Emergency Surgery (WSES) and the American Association for the Surgery of Trauma (AAST), which appeared in autumn 2019, are summarized in this article. They should constitute an aid to making decisions on the optimal treatment of trauma patients with urogenital injuries.

[Summary and comments on the WSES guidelines on open abdomen in trauma and non-trauma patients]. / Zusammenfassung und Kommentar zur WSES-Leitlinie Abdomen apertum bei Trauma- und Nichttraumapatienten.

The first edition of the World Society of Emergency Surgeons (WSES) guidelines on the indications and treatment of open abdomen in trauma as well as in non-trauma patients was published at the end of 2018. Publications from 1980 to 2017 were included in the evaluation. Based on the GRADE system each publication was checked for its evidence and evaluated in a Delphi process. In this article the aspects of the guidelines are presented and commented on.

Emergency surgery during the COVID-19 pandemic: what you need to know for practice.

INTRODUCTION: Several articles have been published about the reorganisation of surgical activity during the COVID-19 pandemic but few, if any, have focused on the impact that this has had on emergency and trauma surgery. Our aim was to review the most current data on COVID-19 to provide essential suggestions on how to manage the acute abdomen during the pandemic. METHODS: A systematic review was conducted of the most relevant English language articles on COVID-19 and surgery published between 15 December 2019 and 30 March 2020. FINDINGS: Access to the operating theatre is almost exclusively restricted to emergencies and oncological procedures. The use of laparoscopy in COVID-19 positive patients should be cautiously considered. The main risk lies in the presence of the virus in the pneumoperitoneum: the aerosol released in the operating theatre could contaminate both staff and the environment. CONCLUSIONS: During the COVID-19 pandemic, all efforts should be deployed in order to evaluate the feasibility of postponing surgery until the patient is no longer considered potentially infectious or at risk of perioperative complications. If surgery is deemed necessary, the emergency surgeon must minimise the risk of exposure to the virus by involving a minimal number of healthcare staff and shortening the occupation of the operating theatre. In case of a lack of security measures to enable safe laparoscopy, open surgery should be considered.

Severe acute pancreatitis: eight fundamental steps revised according to the 'PANCREAS' acronym.

Severe acute pancreatitis remains a life-threatening condition, responsible for many disorders of homeostasis and organ dysfunction. By means of a mnemonic 'PANCREAS', eight important steps in the management of severe acute pancreatitis are highlighted. These steps follow the principle of goal-directed therapy and should be borne in mind after diagnosis and during clinical treatment. The first step is perfusion: the goal is to reach a central venous pressure of 12-15mmHg, urinary output 0.5-1ml/kg/hour and inferior vena cava collapse index greater than 48%. Next is analgesia: multimodal, systemic and combined pharmacological agent and epidural block are possibilities. Third is nutrition: precocity, enteral feeding in gastric or post-pyloric position. Parenteral nutrition works best in difficult cases to achieve the individual total caloric value. Fourth is clinical: mild, moderate or severe pancreatitis according to the Atlanta criteria. Radiology is fifth: abdominal computed tomography on the fourth day for prognosis or to modify management. Endoscopy is sixth: endoscopic retrograde cholangiopancreatography (cholangitis, unpredicted clinical course and ascending jaundice); management of pancreatic fluid collection and 'walled-off necrosis'. Antibiotics come next: infectious complications are common causes of morbidity. The only rational indication for antibiotics is documented pancreatic infection. The last step is surgery: the dogma is represented by the 'three Ds' (delay, drain, debride). The preferred method is a minimally invasive step-up approach, which allows for gradually more invasive procedures when the previous treatment fails.

Emergency repair of complicated abdominal wall hernias: WSES guidelines.

PURPOSE: In July 2013, the World Society of Emergency Surgery (WSES) held the first Consensus Conference on emergency repair of abdominal wall hernias in adult patients with the intention of producing evidence-based guidelines to assist surgeons in the management of complicated abdominal wall hernias. Guidelines were updated in 2017 in keeping with varying clinical practice: benefits resulting from the increased use of biological prosthesis in the emergency setting were highlighted, as previously published in the World Journal of Emergency Surgery. This executive summary is intended to consolidate knowledge on the emergency management of complicated hernias by providing the broad readership with a practical and concise version of the original guidelines. METHODS: This executive manuscript summarizes the WSES guidelines reporting on the emergency management of complicated abdominal wall hernias; statements are highlighted focusing the readers' attention on the main concepts presented in the original guidelines. CONCLUSIONS: Emergency repair of complicated abdominal hernias remains one of the most common and challenging surgical emergencies worldwide. WSES aims to provide an essential version of the evidence-based guidelines focusing on the timing of intervention, laparoscopic approach, surgical repair following the Centers for Disease Control and Prevention (CDC) wound classification, antimicrobial prophylaxis and anesthesia in the emergency setting.

Open conversion for laparoscopically difficult cholecystectomy is still a valid solution with unsolved aspects.

The difficult laparoscopic cholecystectomy remains a surgical challenge for surgeons who must decide between laparoscopic continuation and open conversion. The balance between the lack of open surgery training of young surgeons and the risk of maintaining the laparoscopic approach in difficult laparoscopic cholecystectomy is still an unresolved problem. Furthermore, the time that must be spent in an attempt to complete laparoscopic surgery before conversion is still controversial. The authors in this letter discuss about these and other questions that still require an answer.

Proceedings of resources for optimal care of acute care and emergency surgery consensus summit Donegal Ireland.

BACKGROUND: Opportunities to improve emergency surgery outcomes exist through guided better practice and reduced variability. Few attempts have been made to define optimal care in emergency surgery, and few clinically derived key performance indicators (KPIs) have been published. A summit was therefore convened to look at resources for optimal care of emergency surgery. The aim of the Donegal Summit was to set a platform in place to develop guidelines and KPIs in emergency surgery. METHODS: The project had multidisciplinary global involvement in producing consensus statements regarding emergency surgery care in key areas, and to assess feasibility of producing KPIs that could be used to monitor process and outcome of care in the future. RESULTS: Forty-four key opinion leaders in emergency surgery, across 7 disciplines from 17 countries, composed evidence-based position papers on 14 key areas of emergency surgery and 112 KPIs in 20 acute conditions or emergency systems. CONCLUSIONS: The summit was successful in achieving position papers and KPIs in emergency surgery. While position papers were limited by non-graded evidence and non-validated KPIs, the process set a foundation for the future advancement of emergency surgery.

Erratum to: Antimicrobials: a global alliance for optimizing their rational use in intra-abdominal infections (AGORA).

[This corrects the article DOI: 10.1186/s13017-016-0089-y.].

Erratum to: 2016 WSES guidelines on acute calculous cholecystitis.

[This corrects the article DOI: 10.1186/s13017-016-0082-5.].

2016 WSES guidelines on acute calculous cholecystitis.

Acute calculus cholecystitis is a very common disease with several area of uncertainty. The World Society of Emergency Surgery developed extensive guidelines in order to cover grey areas. The diagnostic criteria, the antimicrobial therapy, the evaluation of associated common bile duct stones, the identification of "high risk" patients, the surgical timing, the type of surgery, and the alternatives to surgery are discussed. Moreover the algorithm is proposed: as soon as diagnosis is made and after the evaluation of choledocholitiasis risk, laparoscopic cholecystectomy should be offered to all patients exception of those with high risk of morbidity or mortality. These Guidelines must be considered as an adjunctive tool for decision but they are not substitute of the clinical judgement for the individual patient.

Effect of intraperitoneal chemotherapy and peritoneal lavage in positive peritoneal cytology in gastric cancer. Systematic review and meta-analysis.

INTRODUCTION: The most common cause of tumour progression in advanced gastric cancer is peritoneal carcinosis (PC). The necessity to increase the survival in advanced diseases suggested to deliver the chemotherapy directly in the peritoneal cavity also in Cy+/PC- and to experiment the effect of massive peritoneal lavage to wash out the tumour cells. The aim of this study is to investigate the gain in term of survival and peritoneal recurrence rate of the intraperitoneal chemotherapy and/or peritoneal lavage in patients with Cy+/PC-. MATERIAL AND METHODS: A systematic review with meta-analysis of trials about the effect of intraperitoneal chemotherapy (IPC) and/or peritoneal lavage (PL) on positive cytology in gastric cancer without carcinosis. RESULTS: Three trials have been included (164 patients: 76 received surgery alone, 51 surgery + IPC and 37 surgery + IPC + PL). Two- and five-years survival is increased by IPC (RR = 1.62, RR = 3.10). 2 and 5 years survival is further increased by IPC + PL (RR = 2.33, RR = 6.19). Peritoneal recurrence is reduced by IPC (OR = 0.45) and by IPC + PL (OR = 0.13). CONCLUSIONS: Two- and five-years overall survival in patients with free cancer cells without carcinosis is incremented by intraperitoneal chemotherapy. Peritoneal lavage further increases these survival rates and also it further decreases the peritoneal recurrence rate.

Antibiotics alone for uncomplicated acute appendicitis in high operative risk adult patients: Analytical review of RCTs and proposal of evidence based treatment decision.

BACKGROUND: Clinical trials have so far shown controversial results as regards the standard of care for treating uncomplicated acute appendicitis (uC-AA). High operational risk adult patients (HORAP) could represent selected patients where primary antibiotic conservative therapy (pACT or A) could be indicated. METHODS: We carried a comprehensive search of the PubMed searching engine in the English language scientific literature from 1995 to 2015, using medical subject headings "antibiotics", "uncomplicated appendicitis", "appendicectomy", "conservative treatment", "surgery" and "randomized clinical trial". All RCTs comparing the outcomes of pACT versus primary surgical open or laparoscopic appendectomy (pSOLA or S) as primary treatment options for uC-AA were identified. Inclusion criteria for our analytical review were RCTs evaluating outcomes in terms of or related to all of the following four parameters: treatment efficacy, post therapeutic/operative complications, in hospital length of stay (LOS) and recurrence. RESULTS: The conclusion of all five RCTs considered antibiotics alone in the treatment of AA as an efficient and non inferior therapeutic option respect to surgery. Primary ACT was characterised by a higher LOS, a higher rate of recurrence and a lower rate of postoperative complication than pSOLA. CONCLUSIONS: Based on the current body of evidence, an appropriate pACT could be a rational tailored primary treatment option for CT proven uC-AA in HORAP. Accurate diagnoses and surgical risk stratification in patients with uC-AA could aid decision making for target therapy. However, results of large sample prospective multicenter RCTs are required to routinely recommend pACT for uC-AA in the clinical practice.

Time course of cytokines, hemodynamic and metabolic parameters during hyperthermic intraperitoneal chemotherapy.

INTRODUCTION: Systemic response to cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) causes the activation of endocrine, metabolic, hemodynamic and inflammatory processes. The aim of this work is to describe and analyze the time course of the inflammatory markers concentration during CRS+HIPEC in plasma and peritoneal fluids and the association with hemodynamic and metabolic parameters. MATERIAL AND METHODS: Pre-, Intra- and Post-operative data were collected. Tumor necrosis factor (TNF), interleukine 6, procalcitonine (PCT), cancer antigen 125 (CA-125) in blood and in peritoneal fluids were evaluated. RESULTS: Thirty-eight patients included, 29 (76.3%) female. Mean/median PCI: 9.2/5. Primary malignancy: 5 colo-rectal (13.2%), 5 gastric (13.2%), 23 ovarian (60.5%) and 5 others (13.2%). CCR 0-1 reached in all patients. Cardiac Index, Heart rate and Central Venous Pressure, increased during the procedure while Stroke Volume Variation showed a decrease. Mean Arterial Pressure and Superior Vena Cava Oxygenation were stable through the whole procedure. TNF and CA-125 were steady during the whole procedure; IL-6 had a relevant increase from baseline to start of perfusion (p<0.01); PCT had a steady increase at every time point. Peritoneal sampling showed a statistically significant increase (p<0.01) between start and end of the perfusion phase for all markers but TNF. Serum and peritoneal marker concentration were similar for TNF, PCT and CA-125. IL-6 showed a sharp difference. CONCLUSION: The most significant variations are those of IL-6 and PCT. The cytokines level parallel the hemodynamic derangements. Treatment during HIPEC should mimic the established treatment during sepsis and septic shock.

Complete versus incomplete cytoreduction in peritoneal carcinosis from gastric cancer, with consideration to PCI cut-off. Systematic review and meta-analysis.

INTRODUCTION: The completeness of cytoreduction has been considerated as fundamental in increasing the life expectancy in patients with peritoneal carcinosis (PC) in gastric cancer. However no definitive data about the real effect of complete cytoreduction (CC) have still been published. Moreover the PCI cut-off to attempt CC with a reasonable risk-benefit ratio still lacks. MATERIAL AND METHODS: A systematic review with meta-analysis of trials of complete vs incomplete cytoreduction in patients with peritoneal carcinosis from GC was performed. RESULTS: Nine trials have been included (748 patients: 417 with CC0-CC1 and 324 with CC2-CC3 cytoreduction). 1, 2, 3 and 5 years survival is favorable to CC0-CC1 (Risk Ratio: 2.41, 8.18, 8.66, and 7.96 respectively). CC0 vs. CC1 survival benefit at 1 and 3 years: RR 2.28 and 6.36 respectively, favoring CC0. 1, 2, 3 and 5 years survival changes significantly above and below a PCI of 12. CONCLUSIONS: 1, 2, 3 and 5-year overall survival is increased by CC0-CC1 cytoreduction in patients with PC from gastric origin. Moreover CC0 increases the 1 and 3 years survival when compared to CC1 cytoreduction.