Stability of Oscillating Gaseous Masses in Massive Brans-Dicke Gravity

This paper explores the instability of gaseous masses for the radial oscillations in post-Newtonian correction of massive Brans-Dicke gravity. For this purpose, we derive linearized perturbed equation of motion through Lagrangian radial perturbation which leads to the condition of marginal stability. We discuss radius of instability of different polytropic structures in terms of the Schwarzschild radius. It is concluded that our results provide a wide range of difference with those in general relativity and Brans-Dicke gravity.Comment: 31 pages, 11 figures, to appear in IJMP

Small bowel emergency surgery: literature's review

Emergency surgery of the small bowel represents a challenge for the surgeon, in the third millennium as well. There is a wide number of pathologies which involve the small bowel. The present review, by analyzing the recent and past literature, resumes the more commons. The aim of the present review is to provide the main indications to face the principal pathologies an emergency surgeon has to face with during his daily activity

WSES classification and guidelines for liver trauma

The severity of liver injuries has been universally classified according to the American Association for the Surgery of Trauma (AAST) grading scale. In determining the optimal treatment strategy, however, the haemodynamic status and associated injuries should be considered. Thus the management of liver trauma is ultimately based on the anatomy of the injury and the physiology of the patient. This paper presents the World Society of Emergency Surgery (WSES) classification of liver trauma and the management Guidelines

Low-pressure versus standard-pressure pneumoperitoneum in laparoscopic cholecystectomy: a systematic review and meta-analysis of randomized controlled trials

Introduction: It has been previously demonstrated that the rise of intra-abdominal pressures and prolonged exposure to such pressures can produce changes in the cardiovascular and pulmonary dynamic which, though potentially well tolerated in the majority of healthy patients with adequate cardiopulmonary reserve, may be less well tolerated when cardiopulmonary reserve is poor. Nevertheless, theoretically lowering intra-abdominal pressure could reduce the impact of pneumoperitoneum on the blood circulation of intra-abdominal organs as well as cardiopulmonary function. However, the evidence remains weak, and as such, the debate remains unresolved. The aim of this systematic review and meta-analysis was to demonstrate the current knowledge around the effect of pneumoperitoneum at different pressures levels during laparoscopic cholecystectomy. Materials and methods: This systematic review and meta-analysis were reported according to the recommendations of the 2020 updated Preferred Reporting Items for Systematic reviews and Meta-analyses (PRISMA) guidelines, and the Cochrane handbook for systematic reviews of interventions. Results: This systematic review and meta-analysis included 44 randomized controlled trials that compared different pressures of pneumoperitoneum in the setting of elective laparoscopic cholecystectomy. Length of hospital, conversion rate, and complications rate were not significantly different, whereas statistically significant differences were observed in post-operative pain and analgesic consumption. According to the GRADE criteria, overall quality of evidence was high for intra-operative bile spillage (critical outcome), overall complications (critical outcome), shoulder pain (critical outcome), and overall post-operative pain (critical outcome). Overall quality of evidence was moderate for conversion to open surgery (critical outcome), post-operative pain at 1 day (critical outcome), post-operative pain at 3 days (important outcome), and bleeding (critical outcome). Overall quality of evidence was low for operative time (important outcome), length of hospital stay (important outcome), post-operative pain at 12 h (critical outcome), and was very low for post-operative pain at 1 h (critical outcome), post-operative pain at 4 h (critical outcome), post-operative pain at 8 h (critical outcome), and post-operative pain at 2 days (critical outcome). Conclusions: This review allowed us to draw conclusive results from the use of low-pressure pneumoperitoneum with an adequate quality of evidence

IROA: the International Register of Open Abdomen.

Actually the most common indications for Open Abdomen (OA) are trauma, abdominal sepsis, severe acute pancreatitis and more in general all those situations in which an intra-abdominal hypertension condition is present, in order to prevent the development of an abdominal compartment syndrome. The mortality and morbidity rate in patients undergone to OA procedures is still high. At present many studies have been published about the OA management and the progresses in survival rate of critically ill trauma and septic surgical patients. However several issues are still unclear and need more extensive studies. The definitions of indications, applications and methods to close the OA are still matter of debate. To overcome this lack of high level of evidence data about the OA indications, management, definitive closure and follow-up, the World Society of Emergency Surgery (WSES) promoted the International Register of Open Abdomen (IROA). The register will be held on a web platform (Clinical Registers®) through a dedicated web site: www.clinicalregisters.org. This will allow to all surgeons and physicians to participate from all around the world only by having a computer and a web connection. The IROA protocol has been approved by the coordinating center Ethical Committee (Papa Giovanni XXIII hospital, Bergamo, Italy). IROA has also been registered to ClinicalTrials.gov (ClinicalTrials.gov Identifier: NCT02382770)

An innovative duodenal perforation surgical repair technique: the BIOPATCH technique

The treatment of duodenal perforations has scarce options and it is very difficult with an high failure rate. The aim of this work is to describe a new surgical technique that was used to treat ten patients suffering from duodenal perforation. The procedure based on the concept to enforce the duodenal suture with remodeling material allowing to the inflamed and oedematous tissues to heal without to be cut by the repairing stitches themselves, is performed with biological prosthesis patches. 90% of patients treated with this innovative technique experienced a complete healing of the duodenal perforation. This unique surgical technique not only proved to be safe, but it also solved the 90% of duodenal perforations in patients at risk to die

Extra-peritoneal hysteroannessiectomy with eventual concomitant en bloc rectal resection and cytoreductive surgery in epithelial ovarian cancer (and other peritoneal surface malignancies): technical details

Surgery allows the correct evaluation of the peritoneal dissemination of the epithelial ovarian cancer (EOC) and the removal of as much tumor as possible to maximize adjuvant chemotherapy. Neoadjuvant chemotherapy (NACT) and interval debulking surgery have been proposed as a reasonable alternative to primary complete cytoreductive surgery (CRS) in patients not fit for an initial extensive debulking surgery. Intraoperative hyperthermic intraperitoneal chemotherapy (HIPEC) has been offered as a promising therapeutic procedure to increase survival by treating the microscopic component of the neoplastic disease. Matherial and Method. 419 eligible patients with stage III-IV EOC were subjected to CRS, previous NACT in 343 patients, 20 of which with CRS combined with extraperitoneal hysterectomy (EH) + HIPEC. Purposes of our four years retrospective observational study are the revision of the surgical approaches to the EOC, a detailed report of the pelvic peritonectomy in association to hysteroannessiectomy (+/- consensual rectal resection) and the prospective review of the results. Conclusions. This study shows that EH + HIPEC is feasible. The detailed description of the technique here depicted could help to standardize this type of peritonectomy

The open abdomen, indications, management and definitive closure

The indications for Open Abdomen (OA) are generally all those situations in which is ongoing the development an intra-abdominal hypertension condition (IAH), in order to prevent the development of abdominal compartmental syndrome (ACS). In fact all those involved in care of a critically ill patient should in the first instance think how to prevent IAH and ACS. In case of ACS goal directed therapy to achieve early opening and early closure is the key: paradigm of closure shifts to combination of therapies including negative pressure wound therapy and dynamic closure, in order to reduce complications and avoid incisional hernia. There have been huge studies and progress in survival of critically ill trauma and septic surgical patients: this in part has been through the great work of pioneers, scientific societies and their guidelines; however future studies and continued innovation are needed to better understand optimal treatment strategies and to define more clearly the indications, because OA by itself is still a morbid procedure.Peer reviewe

Splenectomy in non-traumatic diseases

Splenectomy represents the first choice for treatment of spontaneous splenic rupture, abscesses, cysts, tumours, and an alternative for control of hereditary, autoimmune, and myeloproliferative disorders. However, its relative indications have been reviewed for better understanding of both the primary affections and of splenectomy per se, particularly with regard to the immune system. The emergence of minimally invasive surgery, the possibility of splenic preservation, and availability of biological therapy has shown that the procedure has often been referred to as salvage therapy upon failure of other therapeutic propositions. On the other hand, patients have their general health status compromised by the underlying disease, by the use corticosteroids or biologic therapy, immunosuppressed, coagulation disorders, which contribute to the incidence of postoperative complications, such as infections, bleeding and venous thrombosis. Therefore, this scenario favours higher morbidity and mortality rates than those of other intra-abdominal surgical procedures. Thus, this review has the primary and comprehensive objective of purpose the best moment for splenectomy, when surgeons can interfere in the natural course of the disease increasing patients’ quality of life and survival. In short, it is desired that the surgeon has complete knowledge of the profound physiological changes imposed on the host. In addition, to distinguish when it is curative and mandatory from when it must be put on hold due to other non-operative treatments with similar outcomes and, lastly, when it is not recommended for not aggregating survival