The role of the open abdomen procedure in managing severe abdominal sepsis: WSES position paper

Entero-Cutaneous and Entero-Atmospheric Fistulas: Insights into Management Using Negative Pressure Wound Therapy

Enteric fistulas are a common problem in gastrointestinal tract surgery and remain associated with significant mortality rates, due to complications such as sepsis, malnutrition, and electrolyte imbalance. The increasingly widespread use of open abdomen techniques for the initial treatment of abdominal sepsis and trauma has led to the observation of so-called entero-atmospheric fistulas. Because of their clinical complexity, the proper management of enteric fistula requires a multidisciplinary team. The main goal of the treatment is the closure of enteric fistula, but also mortality reduction and improvement of patients' quality of life are fundamental. Successful management of patients with enteric fistula requires the establishment of controlled drainage, management of sepsis, prevention of fluid and electrolyte depletion, protection of the skin, and provision of adequate nutrition. Many of these fistulas will heal spontaneously within 4 to 6 weeks of conservative management. If closure is not accomplished after this time point, surgery is indicated. Despite advances in perioperative care and nutritional support, the mortality remains in the range of 15 to 30%. In more recent years, the use of negative pressure wound therapy for the resolution of enteric fistulas improved the outcomes, so patients can be successfully treated with a non-operative approach. In this review, our intent is to highlight the most important aspects of negative pressure wound therapy in the treatment of patients with enterocutaneous or entero-atmospheric fistulas.

Optimal tentative abdominal closure for open abdomen: a multicenter retrospective observational study (OPTITAC study)

BACKGROUND

Primary fascia closure is often difficult following an open abdomen (OA). While negative-pressure wound therapy (NPWT) is recommended to enhance successful primary fascia closure, the optimal methods and degree of negative pressure remain unclear. This study aimed to elucidate optimal methods of NPWT as a tentative abdominal closure for OA to achieve primary abdominal fascia closure.

MATERIALS AND METHODS

A multicenter, retrospective, cohort study of adults who survived OA greater than 48 h was conducted in 12 institutions between 2010 and 2022. The achievement of primary fascia closure and incidence of enteroatmospheric fistula were examined based on methods (homemade, superficial NPWT kit, or open-abdomen kit) or degrees of negative pressure (<50, 50-100, or >100 mmHg). A generalized estimating equation was used to adjust for age, BMI, comorbidities, etiology for laparotomy requiring OA, vital signs, transfusion, severity of critical illness, and institutional characteristics.

RESULTS

Of the 279 included patients, 252 achieved primary fascia closure. A higher degree of negative pressure (>100 mmHg) was associated with fewer primary fascia closures than less than 50 mmHg [OR, 0.18 (95% CI: 0.50-0.69), P =0.012] and with more frequent enteroatmospheric fistula [OR, 13.83 (95% CI: 2.30-82.93)]. The methods of NPWT were not associated with successful primary fascia closure. However, the use of the open-abdomen kit was related to a lower incidence of enteroatmospheric fistula [OR, 0.02 (95% CI: 0.00-0.50)].

CONCLUSION

High negative pressure (>100 mmHg) should be avoided in NPWT during tentative abdominal closure for OA.

Damage control surgery in emergency general surgery: What you need to know

ABSTRACT

Damage-control surgery (DCS) is a strategy adopted to limit initial operative interventions in the unstable surgical patient, delaying definitive repairs and abdominal wall closure until physiologic parameters have improved. Although this concept of "physiology over anatomy" was initially described in the management of severely injured trauma patients, the approaches of DCS have become common in the management of nontraumatic intra-abdominal emergencies.While the utilization of damage-control methods in emergency general surgery (EGS) is controversial, numerous studies have demonstrated improved outcomes, making DCS an essential technique for all acute care surgeons. Following a brief history of DCS and its indications in the EGS patient, the phases of DCS will be discussed including an in-depth review of preoperative resuscitation, techniques for intra-abdominal source control, temporary abdominal closure, intensive care unit (ICU) management of the open abdomen, and strategies to improve abdominal wall closure.

Negative-Pressure Wound Therapy for Open Abdomen in Surgical Reintervention after Curative Surgery of Peritoneal Malignancy Increases the Risk of Recurrence

OBJECTIVE

Negative-pressure wound therapy for open abdomen (NPWTOA) helps reduce the risk of abdominal compartment syndrome. However, the risk of recurrence of cancer is unclear when NPWTOA is applied after oncologic resection. The aim of this study was to evaluate the effects of NPWTOA used for major complications on patients treated with cytoreductive surgery for peritoneal malignancy (PM).

METHODS

All patients who underwent an NPWTOA after potentially curative surgery of PM in a single institution were included. These patients were pair matched 1:3 on the Peritoneal Cancer Index, completeness of cytoreduction using a scoring index, and PM origin with patients who underwent surgical reintervention without NPWTOA after curative surgery of PM. Survival among the two groups was compared using the Kaplan-Meier method.

RESULTS

Between 2011 and 2017, among 719 curative surgeries for PM, 13 patients underwent an NPWTOA after surgical reintervention. Researchers paired 9 of these patients to 27 others without NPWTOA after surgical reintervention. Median overall survival was 4.8 and 35 months (P = .391), and median disease-free survival was 4.0 and 13.9 months (P = .022) for the NPWTOA and non-NPWTOA groups, respectively.

CONCLUSIONS

The use of the NPWTOA during surgical reintervention after curative surgery for PM may increase the risk of early recurrence.

Primary anastomosis and suturing combined with vacuum-assisted abdominal closure in patients with secondary peritonitis due to perforation of the small intestine: a retrospective study

BACKGROUND

Intestinal resection and a proximal stoma is the preferred surgical approach in patients with severe secondary peritonitis due to perforation of the small intestine. However, proximal stomas may result in significant nutritional problems and long-term parenteral nutrition. This study aimed to assess whether primary anastomosis or suturing of small intestine perforation is feasible and safe using the open abdomen principle with vacuum-assisted abdominal closure (VAC).

METHODS

Between January 2005 and June 2018, we performed a retrospective chart review of 20 patients (> 18 years) with diffuse faecal peritonitis caused by small intestinal perforation and treated with primary anastomosis/suturing and subsequent open abdomen with VAC.

RESULTS

The median age was 65 years (range: 23-90 years). Twelve patients were female (60%). Simple suturing of the small intestinal perforation was performed in three cases and intestinal resection with primary anastomosis in 17 cases. Four patients (20%) died within 90-days postoperatively. Leakage occurred in five cases (25%), and three patients developed an enteroatmospheric fistula (15%). Thirteen of 16 patients (83%) who survived were discharged without a stoma. The rest had a permanent stoma.

CONCLUSIONS

Primary suturing or resection with anastomosis and open abdomen with VAC in small intestinal perforation with severe faecal peritonitis is associated with a high rate of leakage and enteroatmospheric fistula formation.

TRIAL REGISTRATION

The study was approved by the Danish Patient Safety Authority (case number 3-3013-1555/1) and the Danish Data Protection Agency (file number 18/28,404). No funding was received.

The open abdomen in trauma, acute care, and vascular and endovascular surgery: comprehensive, expert, narrative review

BACKGROUND

The open abdomen is an innovation that greatly improved surgical understanding of damage control, temporary abdominal closure, staged abdominal reconstruction, viscera and enteric fistula care, and abdominal wall reconstruction. This article provides an evidence-informed, expert, comprehensive narrative review of the open abdomen in trauma, acute care, and vascular and endovascular surgery.

METHODS

A group of 12 international trauma, acute care, and vascular and endovascular surgery experts were invited to review current literature and important concepts surrounding the open abdomen.

RESULTS

The open abdomen may be classified using validated systems developed by a working group in 2009 and modified by the World Society of the Abdominal Compartment Syndrome-The Abdominal Compartment Society in 2013. It may be indicated in major trauma, intra-abdominal sepsis, vascular surgical emergencies, and severe acute pancreatitis; to facilitate second look laparotomy or avoid or treat abdominal compartment syndrome; and when the abdominal wall cannot be safely closed. Temporary abdominal closure and staged abdominal reconstruction methods include a mesh/sheet, transabdominal wall dynamic fascial traction, negative pressure wound therapy, and hybrid negative pressure wound therapy and dynamic fascial traction. This last method likely has the highest primary fascial closure rates. Direct peritoneal resuscitation is currently an experimental strategy developed to improve primary fascial closure rates and reduce complications in those with an open abdomen. Primary fascial closure rates may be improved by early return to the operating room; limiting use of crystalloid fluids during the surgical interval; and preventing and/or treating intra-abdominal hypertension, enteric fistulae, and intra-abdominal collections after surgery. The majority of failures of primary fascial closure and enteroatmospheric fistula formation may be prevented using effective temporary abdominal closure techniques, providing appropriate resuscitation fluids and nutritional support, and closing the abdomen as early as possible.

CONCLUSION

Subsequent stages of the innovation of the open abdomen will likely involve the design and conduct of prospective studies to evaluate appropriate indications for its use and effectiveness and safety of the above components of open abdomen management.

The unrestricted global effort to complete the COOL trial

BACKGROUND

Severe complicated intra-abdominal sepsis (SCIAS) has an increasing incidence with mortality rates over 80% in some settings. Mortality typically results from disruption of the gastrointestinal tract, progressive and self-perpetuating bio-mediator generation, systemic inflammation, and multiple organ failure. A further therapeutic option may be open abdomen (OA) management with negative peritoneal pressure therapy (NPPT) to remove inflammatory ascites and attenuate the systemic damage from SCIAS, although there are definite risks of leaving the abdomen open whenever it might possibly be closed. This potential therapeutic paradigm is the rationale being assessed in the Closed Or Open after Laparotomy (COOL trial) ( https://clinicaltrials.gov/ct2/show/NCT03163095 ). Initially, the COOL trial received Industry sponsorship; however, this funding mandated the use of a specific trademarked and expensive NPPT device in half of the patients allocated to the intervention (open) arm. In August 2022, the 3 M/Acelity Corporation without consultation but within the terms of the contract canceled the financial support of the trial. Although creating financial difficulty, there is now no restriction on specific NPPT devices and removing a cost-prohibitive intervention creates an opportunity to expand the COOL trial to a truly global basis. This document describes the evolution of the COOL trial, with a focus on future opportunities for global growth of the study.

METHODS

The COOL trial is the largest prospective randomized controlled trial examining the random allocation of SCIAS patients intra-operatively to either formal closure of the fascia or the use of the OA with an application of an NPPT dressing. Patients are eligible if they have free uncontained intraperitoneal contamination and physiologic derangements exemplified by septic shock OR severely adverse predicted clinical outcomes. The primary outcome is intended to definitively inform global practice by conclusively evaluating 90-day survival. Initial recruitment has been lower than hoped but satisfactory, and the COOL steering committee and trial investigators intend with increased global support to continue enrollment until recruitment ensures a definitive answer.

DISCUSSION

OA is mandated in many cases of SCIAS such as the risk of abdominal compartment syndrome associated with closure, or a planned second look as for example part of "damage control"; however, improved source control (locally and systemically) is the most uncertain indication for an OA. The COOL trial seeks to expand potential sites and proceed with the evaluation of NPPT agnostic to device, to properly examine the hypothesis that this treatment attenuates systemic damage and improves survival. This approach will not affect internal validity and should improve the external validity of any observed results of the intervention.

TRIAL REGISTRATION

National Institutes of Health ( https://clinicaltrials.gov/ct2/show/NCT03163095 ).

Vacuum-assisted laparostomy in severe abdominal trauma and urgent abdominal pathology with compartment syndrome, peritonitis and sepsis: Comparison with other options for multistage surgical treatment (systematic review and meta-analysis)

Background. The concept of multistage surgical treatment of patients has been established in surgery rather recently and therefore the discussions on the expediency of using a particular surgical technique in a specific situation still continue. Vacuum-assisted laparostomy is being widely implemented into clinical practice for the treatment of abdominal compartment syndrome, severe peritonitis and abdominal trauma, but the indications and advantages of this method are not clearly defined yet.

The aim of the study. To conduct a systematic review and meta-analysis on the comparison of the effectiveness of vacuum-assisted laparostomy with various variants of relaparotomy and laparostomy without negative pressure therapy in  the  treatment of patients with urgent abdominal pathology and abdominal trauma complicated by widespread peritonitis, sepsis or compartment syndrome.

Material and methods. A systematic literature search was conducted in accordance with the recommendations of “Preferred Reporting Items for Systematic Reviews and Meta-Analyses”. We carried out the analysis of non-randomized (since January 2007 until August 6, 2022) and randomized (without time limits for the start of the study and until August 6, 2022) studies from the electronic databases eLibrary, PubMed, Cochrane Library, Science Direct, Google Scholar Search, Mendeley.

Results. Vacuum-assisted laparostomy causes statistically significant shortening of the time of treatment of patients in the ICU and in hospital and a decrease in  postoperative mortality compared to other variants of laparostomy without vacuum assistance.

Conclusion. To obtain data of a higher level of evidence and higher grade of recommendations, it is necessary to further conduct systematic reviews and meta-analyses based on randomized clinical studies. 

Patients with an Open Abdomen in Asian, American and European Continents: A Comparative Analysis from the International Register of Open Abdomen (IROA)

BACKGROUND

International register of open abdomen (IROA) enrolls patients from several centers in American, European, and Asiatic continent. The aim of our study is to compare the characteristics, management and clinical outcome of adult patients treated with OA in the three continents.

MATERIAL AND METHODS

A prospective analysis of adult patients enrolled in the international register of open abdomen (IROA).

TRIAL REGISTRATION

NCT02382770.

RESULTS

1183 patients were enrolled from American, European and Asiatic Continent. Median age was 63 years (IQR 49-74) and was higher in the European continent (65 years, p < 0.001); 57% were male. The main indication for OA was peritonitis (50.6%) followed by trauma (15.4%) and vascular emergency (13.5%) with differences among the continents (p < 0.001). Commercial NPWT was preferred in America and Europe (77.4% and 52.3% of cases) while Barker vacuum pack (48.2%) was the preferred temporary abdominal closure technique in Asia (p < 0.001). Definitive abdominal closure was achieved in 82.3% of cases in America (fascial closure in 90.2% of cases) and in 56.4% of cases in Asia (p < 0.001). Prosthesis were mostly used in Europe (17.3%, p < 0.001). The overall entero-atmospheric fistula rate 2.5%. Median open abdomen duration was 4 days (IQR 2-7). The overall intensive care unit and hospital length-of-stay were, respectively, 8 and 11 days (no differences between continents). The overall morbidity and mortality rates for America, Europe, and Asia were, respectively, 75.8%, 75.3%, 91.8% (p = 0.001) and 31.9%, 51.6%, 56.9% (p < 0.001).

CONCLUSION

There is no uniformity in OA management in the different continents. Heterogeneous adherence to international guidelines application is evident. Different temporary abdominal closure techniques in relation to indications led to different outcomes across the continents. Adherence to guidelines, combined with more consistent data, will ultimately allow to improving knowledge and outcome.

Abdominal Compartment Syndrome in Acute Pancreatitis: A Narrative Review

Abdominal compartment syndrome (ACS) represents a severe complication of acute pancreatitis (AP), resulting from an acute and sustained increase in abdominal pressure >20 mmHg, in association with new organ dysfunction. The harmful effect of high intra-abdominal pressure on regional and global perfusion results in significant multiple organ failure and is associated with increased morbidity and mortality. There are several deleterious consequences of elevated intra-abdominal pressure on end-organ function, including respiratory, cardiovascular, gastrointestinal, neurologic, and renal effects. It is estimated that about 15% of patients with severe AP develop intra-abdominal hypertension or ACS, with a mortality rate around 50%. The treatment of abdominal compartment syndrome in acute pancreatitis begins with medical intervention and percutaneous drainage, where possible. Abdominal compartment syndrome unresponsive to conservatory treatment requires immediate surgical decompression, along with vacuum-assisted closure therapy techniques, followed by early abdominal fascia closure.

Bison Goring Resulting in Abdominal Evisceration and Cervical Fracture: A Case Report

BACKGROUND

Handling livestock can be dangerous, and livestock-related injuries are increasing.

CASE PRESENTATION

An 83-year-old man who was gored and thrown by a bison bull during feeding is presented. The traumatic event resulted in two major injuries: an abdominal laceration with intestinal evisceration and cervical fractures after being lifted and forcefully thrown. The patient's hospital course included emergent surgery using the damage control approach resulting in an open abdomen, postoperatively, intensive care unit placement, and physiological management of the lethal diamond (acidosis, coagulopathy, hypothermia, and hypocalcemia). Finally, the patient's injuries required repeated abdominoplasties, colostomy, and surgical cervical stabilization. Despite a complicated hospitalization, the patient returned to his previous lifestyle within 2 months.

CONCLUSION

The geriatric population, despite multiple comorbidities, is active, and their dynamic lifestyle can result in severe injuries. Positive outcomes for this population are possible. Even if severely injured, the geriatric population has the propensity to rebound and survive with early aggressive management.

Retrospective Study of Indications and Outcomes of Open Abdomen with Negative Pressure Wound Therapy Technique for Abdominal Sepsis in a Tertiary Referral Centre

In patients with advanced sepsis from abdominal disease, the open abdomen (OA) technique as part of a damage control surgery (DCS) approach enables relook surgery to control infection, defer intestinal anastomosis, and prevent intra-abdominal hypertension. Limited evidence is available on key outcomes, such as mortality and rate of definitive fascial closure (DFC), which are needed for surgeons to select patients and adequate therapeutic strategies. Abdominal closure with negative pressure wound therapy (NPWT) has shown rates of DFC around 90%. We conducted a retrospective study to evaluate in-hospital survival and factors associated with mortality in acute, non-trauma patients treated using the OA technique and NPWT for sepsis from abdominal disease. Fifty consecutive patients treated using the OA technique and NPWT between February 2015 and July 2022 were included. Overall mortality was 32%. Among surviving patients, 97.7% of cases reached DFC, and the overall complication rate was 58.8%, with one case of entero-atmospheric fistula. At univariable analysis, age (p = 0.009), ASA IV status (<0.001), Mannheim Peritonitis Index > 30 (p = 0.001) and APACHE II score (p < 0.001) were associated with increased mortality. At multivariable analysis, higher APACHE II was a predictor of in-hospital mortality (OR 2.136, 95% CI 1.08−4.22; p = 0.029). Although very resource-intensive, DCS and the OA technique are valuable tools to manage patients with advanced abdominal sepsis, allowing reduced mortality and high DFC rates.

Study of damage control strategy for non-traumatic diseases: a single-center observational study

BACKGROUND

Damage control strategy (DCS) has been introduced not only for trauma but also for acute abdomen, but its indications and usefulness have not been clarified. We examined clinical characteristics of patients who underwent DCS and compared clinical characteristics and results with and without DCS in patients with septic shock.

METHODS

We targeted a series of endogenous abdominal diseases in Kansai Medical University Hospital from April 2013 to March 2019. Clinical characteristics of 26 patients who underwent DCS were examined. Then, clinical characteristics and results were compared between the DCS group (n = 26) and non-DCS group (n = 31) in 57 patients with septic shock during the same period.

RESULTS

All 26 patients who underwent DCS had septic shock, low mean arterial pressure (MAP) before the start of surgery, and required high-dose norepinephrine administration intraoperatively. Their discharge mortality rate was 12%. Among the patients with septic shock, the DCS group had a higher SOFA score (P = 0.008) and MAP was lower preoperatively, but it did not increase even with intraoperative administration of large amounts of fluid replacement and vasoconstrictor. There was no significant difference in 28-day mortality and discharge mortality between the two groups.

CONCLUSIONS

DCS may be useful in patients with severe septic shock.

Vacuum-assisted closure versus on-demand relaparotomy in patients with secondary peritonitis-the VACOR trial: protocol for a randomised controlled trial

Background

Secondary peritonitis is a severe condition with a 20–32% reported mortality. The accepted treatment modalities are vacuum-assisted closure (VAC) or primary closure with relaparotomy on-demand (ROD). However, no randomised controlled trial has been completed to compare the two methods potential benefits and disadvantages.

Methods

This study will be a randomised controlled multicentre trial, including patients aged 18 years or older with purulent or faecal peritonitis confined to at least two of the four abdominal quadrants originating from the small intestine, colon, or rectum. Randomisation will be web-based to either primary closure with ROD or VAC in blocks of 2, 4, and 6. The primary endpoint is peritonitis-related complications within 30 or 90 days and one year after index operation. Secondary outcomes are comprehensive complication index (CCI) and mortality after 30 or 90 days and one year; quality of life assessment by (SF-36) after three and 12 months, the development of incisional hernia after 12 months assessed by clinical examination and CT-scanning and healthcare resource utilisation. With an estimated superiority of 15% in the primary outcome for VAC, 340 patients must be included. Hospitals in Denmark and Europe will be invited to participate.

Discussion

There is no robust evidence for choosing either open abdomen with VAC treatment or primary closure with relaparotomy on-demand in patients with secondary peritonitis. The present study has the potential to answer this important clinical question.

Trial Registration

The study protocol has been registered at clinicaltrials.gov (NCT03932461). Protocol version 1.0, 9 January 2022.

Supplementary Information

The online version contains supplementary material available at 10.1186/s13017-022-00427-x.

Open abdomen technique used in complications of major gynecological oncology surgery

OBJECTIVE

To evaluate the open abdomen technique (laparostomy) used in complications of major gynecological oncology surgery.

METHODS

We analyzed retrospectively the surgical database of all patients who had undergone major open surgery by the same gynecologic oncologist over a 5-year period. All patients who had had open abdomen procedure were identified; demographic data and indications of primary surgery, temporary abdominal closure procedure details, fascia closure and morbidity, mortality rates were evaluated. Intraabdominal infection and intraoperative massive hemorrhage were the major indications for all open abdomen cases. Mannheim Peritonitis Index was used perioperatively to determine open abdomen decision in intraabdominal infections. Vacuum Assisted Abdominal Closure system and Bogota Bag were used for temporary abdominal closure techniques.

RESULTS

Out of the total 560 patients who had undergone major oncological surgery, 19 patients (3.3%) had open abdomen procedure due to surgical complications. Eleven patients had intraabdominal infection, six patients had hemodynamic instability due to peri and postoperative hemorrhage, two patients had gross fecal contamination during posterior pelvic exenteration surgery. The fascia was closed totally in 15 (78%), partially in 3 (15%) and could not be closed in 1 patient who had died secondary to multiorgan failure. Total morbidity and mortality rates were 26% (5/19) (two intrabdominal abscess, one pulmonary embolism, one skin necrosis, one enteroatmospheric fistula) and 5.2% (1/19) respectively.

CONCLUSION

Open abdomen is a life-saving procedure when applied with correct indications and timing. Gynecological oncologic surgeries are candidates to serious complications and gynecologic oncologists dealing with such surgery should be as experienced as general surgeons in this regard.

Negative pressure wound therapy for managing the open abdomen in non-trauma patients

BACKGROUND

Management of the open abdomen is a considerable burden for patients and healthcare professionals. Various temporary abdominal closure techniques have been suggested for managing the open abdomen. In recent years, negative pressure wound therapy (NPWT) has been used in some centres for the treatment of non-trauma patients with an open abdomen; however, its effectiveness is uncertain.

OBJECTIVES

To assess the effects of negative pressure wound therapy (NPWT) on primary fascial closure for managing the open abdomen in non-trauma patients in any care setting.

SEARCH METHODS

In October 2021 we searched the Cochrane Wounds Specialised Register, CENTRAL, MEDLINE, Embase, and CINAHL EBSCO Plus. To identify additional studies, we also searched clinical trials registries for ongoing and unpublished studies, and scanned reference lists of relevant included studies as well as reviews, meta-analyses, and health technology reports. There were no restrictions with respect to language, date of publication, or study setting.

SELECTION CRITERIA

We included all randomised controlled trials (RCTs) that compared NPWT with any other type of temporary abdominal closure (e.g. Bogota bag, Wittmann patch) in non-trauma patients with open abdomen in any care setting. We also included RCTs that compared different types of NPWT systems for managing the open abdomen in non-trauma patients.

DATA COLLECTION AND ANALYSIS

Two review authors independently performed the study selection process, risk of bias assessment, data extraction, and GRADE assessment of the certainty of evidence.

MAIN RESULTS

We included two studies, involving 74 adults with open abdomen associated with various conditions, predominantly severe peritonitis (N = 55). The mean age of the participants was 52.8 years; the mean proportion of women was 39.2%. Both RCTs were carried out in single centres and were at high risk of bias. Negative pressure wound therapy versus Bogota bag We included one study (40 participants) comparing NPWT with Bogota bag. We are uncertain whether NPWT reduces time to primary fascial closure of the abdomen (NPWT: 16.9 days versus Bogota bag: 20.5 days (mean difference (MD) -3.60 days, 95% confidence interval (CI) -8.16 to 0.96); very low-certainty evidence) or adverse events (fistulae formation, NPWT: 10% versus Bogota: 5% (risk ratio (RR) 2.00, 95% CI 0.20 to 20.33); very low-certainty evidence) compared with the Bogota bag. We are also uncertain whether NPWT reduces all-cause mortality (NPWT: 25% versus Bogota bag: 35% (RR 0.71, 95% CI 0.27 to 1.88); very low-certainty evidence) or length of hospital stay compared with the Bogota bag (NPWT mean: 28.5 days versus Bogota bag mean: 27.4 days (MD 1.10 days, 95% CI -13.39 to 15.59); very low-certainty evidence). The study did not report the proportion of participants with successful primary fascial closure of the abdomen, participant health-related quality of life, reoperation rate, wound infection, or pain. Negative pressure wound therapy versus any other type of temporary abdominal closure There were no randomised controlled trials comparing NPWT with any other type of temporary abdominal closure. Comparison of different negative pressure wound therapy devices We included one study (34 participants) comparing different types of NPWT systems (Suprasorb CNP system versus ABThera system). We are uncertain whether the Suprasorb CNP system increases the proportion of participants with successful primary fascial closure of the abdomen compared with the ABThera system (Suprasorb CNP system: 88.2% versus ABThera system: 70.6% (RR 0.80, 95% CI 0.56 to 1.14); very low-certainty evidence). We are also uncertain whether the Suprasorb CNP system reduces adverse events (fistulae formation, Suprasorb CNP system: 0% versus ABThera system: 23.5% (RR 0.11, 95% CI 0.01 to 1.92); very low-certainty evidence), all-cause mortality (Suprasorb CNP system: 5.9% versus ABThera system: 17.6% (RR 0.33, 95% CI 0.04 to 2.89); very low-certainty evidence), or reoperation rate compared with the ABThera system (Suprasorb CNP system: 100% versus ABThera system: 100% (RR 1.00, 95% CI 0.90 to 1.12); very low-certainty evidence). The study did not report the time to primary fascial closure of the abdomen, participant health-related quality of life, length of hospital stay, wound infection, or pain.

AUTHORS' CONCLUSIONS

Based on the available trial data, we are uncertain whether NPWT has any benefit in primary fascial closure of the abdomen, adverse events (fistulae formation), all-cause mortality, or length of hospital stay compared with the Bogota bag. We are also uncertain whether the Suprasorb CNP system has any benefit in primary fascial closure of the abdomen, adverse events, all-cause mortality, or reoperation rate compared with the ABThera system. Further research evaluating these outcomes as well as participant health-related quality of life, wound infection, and pain outcomes is required. We will update this review when data from the large studies that are currently ongoing are available.

Vertical traction device prevents abdominal wall retraction and facilitates early primary fascial closure of septic and non-septic open abdomen

Purpose

One of the major challenges in the management of patients with septic and non-septic open abdomen (OA) is to control abdominal wall retraction. The aim of this study was to evaluate the impact of a novel vertical traction device (VTD) on primary fascial closure (PFC) and prevention of fascial retraction.

Methods

Twenty patients treated with OA were included in this retrospective multicenter study. All patients were initially stabilized with laparostomy and the abdomen temporarily sealed either with a Bogotá bag or a negative pressure wound therapy system (NPWT).

Results

The mean duration of OA and fascia-to-fascia distance (FTF) prior to the VTD application were 3 days and 15 cm, respectively. At relook laparotomy 48 h after VTD implementation, the mean FTF distance significantly decreased to 10 cm (p = 0.0081). In all cases, PFC was achieved after a mean period of 7 days. Twelve patients received the VTD in combination with a NPWT, whereas in eight patients, the device was combined with an alternative temporary abdominal closure system (TAC). Although not statistically significant, the FTF distance remarkably decreased in both groups at relook laparotomy 48 h following the device implementation. The mean periods of PFC for patients with septic and non-septic OA were comparable (7.5 vs. 7 days). During follow-up, two patients developed an incisional hernia.

Conclusion

Vertical traction device prevents fascial retraction and facilitates early PFC in OA. In combination with NPWT, rapid fascial closure of large abdominal defects can be achieved.

Rate of stoma formation following damage-control surgery for severe intra-abdominal sepsis: a single-centre consecutive case series

Background

Severe intra-abdominal sepsis (IAS) is associated with high mortality and stoma rates. A two-stage approach with initial damage-control surgery (DCS) and subsequent reconstruction might decrease stoma and mortality rates but requires standardization.

Methods

A standardized two-stage damage-control algorithm for IAS was implemented in April 2016 and applied systematically.

Results

Some 203 consecutive patients (median age 70 years, 62 per cent ASA score greater than 3) had DCS for severe IAS. Median operation time was 82 minutes, 60 per cent performed during night-time. Median intraoperative noradrenaline doses were 20 (i.q.r. 26) µg/min and blood gas analysis (ABG) was abnormal (metabolic acidosis) in 90 per cent of patients. The second-stage operation allowed definitive surgery in 76 per cent of patients, 24 per cent had up to four re-DCSs until definitive surgery. The in-hospital mortality rate was 26 per cent. At hospital discharge, 65 per cent of patients were stoma free. Risk factors for in-hospital death were noradrenaline (odds ratio 4.25 (95 per cent c.i. 1.72 to 12.83)), abnormal ABG (pH: odds ratio 2.72 (1.24 to 6.65); lactate: odds ratio 6.77 (3.20 to 15.78)), male gender (odds ratio 2.40 (1.24 to 4.85)), ASA score greater than 3 (odds ratio 5.75 (2.58 to 14.68)), mesenteric ischaemia (odds ratio 3.27 (1.71 to 6.46)) and type of resection (odds ratio 2.95 (1.24 to 8.21)). Risk factors for stoma at discharge were ASA score greater than 3 (odds ratio 2.76 (95 per cent c.i. 1.38 to 5.73)), type of resection (odds ratio 30.91 (6.29 to 559.3)) and longer operation time (odds ratio 2.441 (1.22 to 5.06)).

Conclusion

Initial DCS followed by secondary reconstruction of bowel continuity for IAS within 48 hours in a tertiary teaching hospital was feasible and safe, following a clear algorithm.

Intra-abdominal hypertension and abdominal compartment syndrome in critically ill patients: A narrative review of past, present, and future steps

BACKGROUND AND OBJECTIVE

Intra-abdominal hypertension is frequently present in critically ill patients and is an independent predictor for mortality. In this narrative review, we aim to provide a comprehensive overview of current insights into intra-abdominal pressure monitoring, intra-abdominal hypertension, and abdominal compartment syndrome. The focus of this review is on the pathophysiology, risk factors and outcome of intra-abdominal hypertension and abdominal compartment syndrome, and on therapeutic strategies, such as non-operative management, surgical decompression, and management of the open abdomen. Finally, future steps are discussed, including propositions of what a future guideline should focus on.

CONCLUSIONS

Pathological intra-abdominal pressure is a continuum ranging from mild intra-abdominal pressure elevation without clinically significant adverse effects to substantial increase in intra-abdominal pressure with serious consequences to all organ systems. Intra-abdominal pressure monitoring should be performed in all patients at risk of intra-abdominal hypertension. Although continuous intra-abdominal pressure monitoring is feasible, this is currently not standard practice. There are a number of effective non-operative medical interventions that may be performed early in the patient's course to reduce intra-abdominal pressure and decrease the need for surgical decompression. Abdominal decompression can be life-saving when abdominal compartment syndrome is refractory to non-operative treatment and should be performed expeditiously. The objectives of open abdomen management are to prevent fistula and to achieve delayed fascial closure at the earliest possible time. There is still a lot to learn and change. The 2013 World Society of Abdominal Compartment Syndrome guidelines should be updated and multicentre studies should evaluate the effect of intra-abdominal hypertension treatment on patient outcome.

Should Negative Pressure Therapy Replace Any Other Temporary Abdominal Closure Device in Open-Abdomen Management of Secondary Peritonitis?

AIM

To clarify the advantages of negative pressure therapy (NPT) compared to other methods of temporary abdominal closure (TAC) in the management of secondary peritonitis.

METHODS

We retraced the history of known methods of TAC, and analyzed their advantages and disadvantages. We evaluated as the NPT mechanisms, both from the macroscopic that bio-molecular point of view, well suits to manage this difficult condition.

RESULTS

The ideal TAC technique should be quick to apply, easy to change, protect and contain the abdominal viscera, decrease bowel edema, prevent loss of domain and abdominal compartment syndrome, limit contamination, allow egress of peritoneal fluid (and its estimation) and not result in adhesions. It should also be cost-effective, minimize the number of dressing changes and the number of surgical revisions, and ensure a high rate of early closure with a low rate of complications (especially entero-atmospheric fistula). For NPT, the reported fistula rate is 7%, primary fascial closure ranges from 33 to 100% (average 60%) and the mortality rate is about 20%. With the use of NPT as TAC, it may be possible to extend the window of time to achieve primary fascial closure (for up to 20-40 days).

CONCLUSION

NPT has several potential advantages in open-abdomen (OA) management of secondary peritonitis and may make it possible to achieve all the goals suggested above for an ideal TAC system. Only trained staff should use NPT, following the manufacturer's instructions when commercial products are used. Even if there was a significant evolution in OA management, we believe that further research into the role of NPT for secondary peritonitis is necessary.

The role of damage control surgery in the treatment of perforated colonic diverticulitis: a systematic review and meta-analysis

INTRODUCTION

Damage control surgery (DCS) is the classic approach to manage severe trauma and has recently also been considered an appropriate approach to the treatment of critically ill patients with severe intra-abdominal sepsis. The purpose of the present review is to evaluate the outcomes following DCS for Hinchey II-IV complicated acute diverticulitis (CAD).

METHODS

A comprehensive systematic search was undertaken to identify all randomized clinical trials (RCTs) and observational studies, irrespectively of their size, publication status, and language. Adults who have undergone DCS for CAD Hinchey II, III, or IV were included in this review. DCS is compared with the immediate and definitive surgical treatment in the form of HP, colonic resection, and primary anastomosis (RPA) with or without covering stoma or laparoscopic lavage. We searched the following electronic databases: PubMed MEDLINE, Scopus, and ISI Web of Knowledge. The protocol of this systematic review and meta-analysis was published on Prospero (CRD42020144953).

RESULTS

Nine studies with 318 patients, undergoing DCS, were included. The presence of septic shock at the presentation in the emergency department was heterogeneous, and the weighted mean rate of septic shock across the studies was shown to be 35.1% [95% CI 8.4 to 78.6%]. The majority of the patients had Hinchey III (68.3%) disease. The remainder had either Hinchey IV (28.9%) or Hinchey II (2.8%). Phase I is similarly described in most of the studies as lavage, limited resection with closed blind colonic ends. In a few studies, resection and anastomosis (9.1%) or suture of the perforation site (0.9%) were performed in phase I of DCS. In those patients who underwent DCS, the most common method of temporary abdominal closure (TAC) was the negative pressure wound therapy (NPWT) (97.8%). The RPA was performed in 62.1% [95% CI 40.8 to 83.3%] and the 22.7% [95% CI 15.1 to 30.3%]: 12.8% during phase I and 87.2% during phase III. A covering ileostomy was performed in 6.9% [95% CI 1.5 to 12.2%]. In patients with RPA, the overall leak was 7.3% [95% CI 4.3 to 10.4%] and the major anastomotic leaks were 4.7% [95% CI 2.0 to 7.4%]; the rate of postoperative mortality was estimated to be 9.2% [95% CI 6.0 to 12.4%].

CONCLUSIONS

The present meta-analysis revealed an approximately 62.1% weighted rate of achieving GI continuity with the DCS approach to generalized peritonitis in Hinchey III and IV with major leaks of 4.7% and overall mortality of 9.2%. Despite the promising results, we are aware of the limitations related to the significant heterogeneity of inclusion criteria. Importantly, the low rate of reported septic shock may point toward selection bias. Further studies are needed to evaluate the clinical advantages and cost-effectiveness of the DCS approach.

Quality of Life After Open Abdominal Treatment With Vacuum-Assisted Wound Closure and Mesh-Mediated Fascial Traction

INTRODUCTION

Little is known about the long-term outcome of open abdomen treatment with vacuum-assisted wound closure and mesh-3. Therefore, this study's purpose is to evaluate this with a particular focus on incisional hernia development and quality of life (QoL).

MATERIALS AND METHODS

Fifty-five patients who underwent vacuum-assisted wound closure and mesh-mediated fascial traction at our institution from 2006 to 2013 were prospectively enrolled in this study. After a median follow-up period of 3.8 years, 34 patients attended a follow-up examination, including the SF-36 QoL questionnaire.

RESULTS

The fascial closure rate was 74% (intention-to-treat) and 89% (per-protocol). Enteroatmospheric fistulae occurred in 1.8%. In-hospital mortality was 16.4%, and during the follow-up period, it was 27.4%. Incisional hernias developed in 35% of the cases.The SF-36 physical role (54.6 ± 41.0 (0-100), P < 0.01), physical functioning (68.4 ± 29.5 (0-100), P = 0.01), and physical component summary (41.6 ± 13.0 (19-62), P = 0.01) scores for the patient population were significantly lower than normative scores. The mental dimensions of QoL showed no differences.A subgroup analysis revealed that the lower scores for physical role, physical functioning, and physical component summary only existed in the subgroup of incisional hernia patients. In contrast, physical and mental SF-36 scores of patients without incisional hernias did not differ from the normative scores.

CONCLUSIONS

Vacuum-assisted wound closure and mesh-mediated fascial traction seems to result in low complication rates. However, incisional hernias occur in 35%, which are the leading cause of reduced QoL. Measures to further improve this rate, such as prophylactic meshes, have to be evaluated.

Combination of dirty mass volume and APACHE II score predicts mortality in patients with colorectal perforation

Background

“Dirty mass” is a specific computed tomography (CT) finding that is seen frequently in colorectal perforation. The prognostic significance of this finding for mortality is unclear.

Methods

Fifty-eight consecutive patients with colorectal perforation who underwent emergency surgery were retrospectively reviewed in the study. Dirty mass identified on multi-detector row CT (MDCT) was 3D-reconstructed and its volume was calculated using Ziostation software. Dirty mass volume and other clinical characteristics were compared between survivor (n = 45) and mortality groups (n = 13) to identify predictive factors for mortality. Mann–Whitney U test and Χ² test were used in univariate analysis and logistic regression analysis was used in multivariate analysis.

Results

Dirty mass was identified in 36/58 patients (62.1%) and located next to perforated colorectum in all cases. Receiver-operating characteristic (ROC) curve analysis identified the highest peak at 96.3 cm³, with sensitivity of 0.643 and specificity of 0.864. Univariate analysis revealed dirty mass volume, acute disseminated intravascular coagulation (DIC) score, acute physiology and chronic health evaluation II (APACHE II) score, and sequential organ failure assessment (SOFA) score as prognostic markers for mortality (p<0.01). Multivariate analysis revealed dirty mass volume and APACHE II score as independent prognostic indicators for mortality. Mortality was stratified by dividing patients into four groups according to dirty mass volume and APACHE II score.

Conclusions

The combination of dirty mass volume and APACHE II score could stratify the postoperative mortality risk in patients with colorectal perforation. According to the risk stratification, surgeons might be able to decide the surgical procedures and intensity of postoperative management.

Early Initiation of a Standardized Open Abdomen Treatment With Vacuum Assisted Mesh-Mediated Fascial Traction Achieves Best Results

Background: The open abdomen (OA) is an important approach for managing intra-abdominal catastrophes and continues to be the standard of care. Complete fascial closure is an essential treatment objective and can be achieved by the use of different dynamic closure techniques. Both surgical technique and-decision making are essential for optimal patient outcome in terms of fascial closure. The aim of this study was to analyse patients' outcome after the use of mesh-mediated fascial traction (MMFT) associated with negative pressure wound therapy (NPWT) and identify important factors that negatively influenced final fascial closure. Methods: A single center ambispective analysis was performed including all patients treated for an open abdomen in a tertiary referral center from 3/2011 till 2/2020. All patients with a minimum survival >24 h after initiation of treatment were analyzed. The data concerning patient management was collected and entered into the Open Abdomen Route of the European Hernia Society (EHS). Patient basic characteristics considering OA indication, primary fascial closure, as well as important features in surgical technique including time after index procedure to start mesh mediated fascial traction, surgical closure techniques and patients' long-term outcomes were analyzed. Results: Data were obtained from 152 patients who underwent open abdomen therapy (OAT) in a single center study. Indications for OAT as per-protocol analysis were sepsis (33.3%), abdominal compartment syndrome (31.6%), followed by peritonitis (24.2%), abdominal trauma (8.3%) and burst abdomen (2.4%). Overall fascial closure rate was 80% as in the per-protocol analysis. When patients that started OA management with MMFT and NPWT from the initial surgery a significantly better fascial closure rate was achieved compared to patients that started 3 or more days later (p < 0.001). An incisional hernia developed in 35.8% of patients alive with a median follow-up of 49 months (range 6-96 months). Conclusion: Our main findings emphasize the importance of a standardized treatment plan, initiated early on during management of the OA. The use of vacuum assisted closure in combination with MMFT showed high rates of fascial closure. Absence of initial intraperitoneal NPWT as well as delayed start of MMFT were risk factors for non-fascial closure. Initiation of OA with VACM should not be unnecessary delayed.

Open Abdomen Treatment in Acute Pancreatitis

Background: Severe acute pancreatitis (SAP) is a heterogeneous and life-threatening disease. While recent guidelines recommend a stepwise approach starting with non-surgical techniques, emergency laparotomy remains inevitable in certain situations. Open abdomen treatment (OAT) may follow, potentially resulting in additional risks for severe morbidity. Causative factors and clinical impact of OAT in SAP are poorly understood and therefore issue of the present study. Materials and Methods: A retrospective analysis of patients admitted to the Department of General, Visceral, Thoracic and Vascular Surgery at University of Bonn suffering from acute pancreatitis (ICD K.85) between 2005 and 2020 was performed. Medical records were screened for demographic, clinical and outcome parameters. Patients who received primary fascial closure (PFC) were compared to those patients requiring OAT. SAP-specific scores were calculated, and data statistically analyzed (P = 0.05). Results: Among 430 patients included, 54 patients (13%) had to undergo emergency laparotomy for SAP. Patients were dominantly male (72%) with a median age of 51 years. Indications for surgery were infected necrosis (40%), suspected bowel perforation (7%), abdominal compartment syndrome (5%), and acute intra-abdominal hemorrhage (3%). While 22 patients (40%) had PFC within initial surgery, 33 patients (60%) required OAT including a median of 12 subsequent operations (SD: 6, range: 1-24). Compared to patients with PFC, patients in the OAT group had significantly fewer biliary SAP (P = 0.031), higher preoperative leukocyte counts (P = 0.017), higher rates of colon resections (P = 0.048), prolonged ICU stays (P = 0.0001), and higher morbidity according to Clavien-Dindo Classification (P = 0.002). Additionally, BISAP score correlated positively with the number of days spent at ICU and morbidity (P = 0.001 and P = 0.000002). Both groups had equal mortality rates. Discussion: Our data suggest that preoperative factors in surgically treated SAP may indicate the need for OAT. The procedure itself appears safe with equal hospitalization days and mortality rates compared to patients with PFC. However, OAT may significantly increase morbidity through longer ICU stays and more bowel resections. Thus, minimally invasive options should be promoted for an uncomplicated and rapid recovery in this severe disease. Emergency laparotomy will remain ultima ratio in SAP while patient selection seems to be crucial for improved clinical outcomes.

Secondary Peritonitis and Intra-Abdominal Sepsis: An Increasingly Global Disease in Search of Better Systemic Therapies

Secondary peritonitis and intra-abdominal sepsis are a global health problem. The life-threatening systemic insult that results from intra-abdominal sepsis has been extensively studied and remains somewhat poorly understood. While local surgical therapy for perforation of the abdominal viscera is an age-old therapy, systemic therapies to control the subsequent systemic inflammatory response are scarce. Advancements in critical care have led to improved outcomes in secondary peritonitis. The understanding of the effect of secondary peritonitis on the human microbiome is an evolving field and has yielded potential therapeutic targets. This review of secondary peritonitis discusses the history, classification, pathophysiology, diagnosis, treatment, and future directions of the management of secondary peritonitis. Ongoing clinical studies in the treatment of secondary peritonitis and the open abdomen are discussed.

Prophylactic Onlay Mesh Implantation During Definitive Fascial Closure After Open Abdomen Therapy (PROMOAT): Absorbable or Non-absorbable? Methodical Description and Results of a Feasibility Study

Introduction: Incisional hernia development after open abdomen therapy (OAT) remains a common complication in the long run. To demonstrate the feasibility, we describe our method of prophylactic onlay mesh implantation with definitive fascial closure after open abdomen therapy (PROMOAT). To display the feasibility of this concept, we evaluated the short-term outcome after absorbable and non-absorbable synthetic mesh implantation as prophylactic onlay. Material and Methods: Ten patients were prospectively enrolled, and prophylactic onlay mesh (long-term absorbable or non-absorbable) was implanted at the definitive fascial closure operation. The cohort was followed up with a special focus on incisional hernia development and complications. Results: OAT duration was 21.0 ± 12.6 days (95% CI: 16.9-25.1). Definitive fascial closure was achieved in all cases. No incisional hernias were present during a follow-up interval of 12.4 ± 10.8 months (range 1-30 months). Two seromas and one infected hematoma occurred. The outcome did not differ between mesh types. Conclusion: The prophylactic onlay mesh implantation of alloplastic, long-term absorbable, or non-absorbable meshes in OAT showed promising results and only a few complications that were of minor concern. Incisional hernias did not occur during follow-up. To validate the feasibility and safety of prophylactic onlay mesh implantation long-term data and large-scaled prospective trials are needed to give recommendations on prophylactic onlay mesh implantation after OAT.

Factors influencing the fascial closure rate after open abdomen treatment: Results from the European Hernia Society (EuraHS) Registry : Surgical technique matters

Purpose

Definitive fascial closure is an essential treatment objective after open abdomen treatment and mitigates morbidity and mortality. There is a paucity of evidence on factors that promote or prevent definitive fascial closure.

Methods

A multi-center multivariable analysis of data from the Open Abdomen Route of the European Hernia Society included all cases between 1 May 2015 and 31 December 2019. Different treatment elements, i.e. the use of a visceral protective layer, negative-pressure wound therapy and dynamic closure techniques, as well as patient characteristics were included in the multivariable analysis. The study was registered in the International Clinical Trials Registry Platform via the German Registry for Clinical Trials (DRK00021719).

Results

Data were included from 630 patients from eleven surgical departments in six European countries. Indications for OAT were peritonitis (46%), abdominal compartment syndrome (20.5%), burst abdomen (11.3%), abdominal trauma (9%), and other conditions (13.2%). The overall definitive fascial closure rate was 57.5% in the intention-to-treat analysis and 71% in the per-protocol analysis. The multivariable analysis showed a positive correlation of negative-pressure wound therapy (odds ratio: 2.496, p < 0.001) and dynamic closure techniques (odds ratio: 2.687, p < 0.001) with fascial closure and a negative correlation of intra-abdominal contamination (odds ratio: 0.630, p = 0.029) and the number of surgical procedures before OAT (odds ratio: 0.740, p = 0.005) with DFC.

Conclusion

The clinical course and prognosis of open abdomen treatment can significantly be improved by the use of treatment elements such as negative-pressure wound therapy and dynamic closure techniques, which are associated with definitive fascial closure.

Electronic supplementary material

The online version of this article (10.1007/s10029-020-02336-x) contains supplementary material, which is available to authorized users.

The Need for Emergency Laparotomy With Open Abdomen Therapy in the Course of ECMO-A Retrospective Analysis of Course and Outcome

Background: Abdominal compartment syndrome (ACS) can occur in patients placed on extra corporeal membrane oxygenation (ECMO). This implies the necessity of decompressive laparotomy followed by an open abdomen (OA) to prevent complications such as multi-organ-failure or death.

Methods: We searched for ECMO patients in our hospital database between July 2015 and April 2020 and selected those with an emergency laparotomy and OA therapy. Of these, we analyzed only patients who were treated with an OA after establishing the ECMO regarding patient-related parameters like sex, age, height, weight, and indications for ECMO as well as outcome parameters like complete fascial closure rate, mortality, length of stay in intensive care unit (ICU), length and kind of OA therapy, number of surgical procedures, dressing changes concerning negative pressure wound therapy (NPWT), and number of surgical revisions.

Results: In eight out of 421 patients (1.9%), a laparostoma had to be created during ECMO support. For temporary closure, either NPWT, abdominal packing, or both were used. The median length of OA therapy was 17 days, and the median length of stay in ICU was 42 days in total. The median number of surgical procedures and NPWT dressing changes was seven. In three of the eight patients, a surgical revision was necessary. The total mortality rate was 50%. In 75%, the fascia could be closed. Two patients died before final closure. In all deceased patients, an abdominal packing was necessary during the course of treatment; in the survivors, only once. No enteroatmospheric fistula or abscesses occurred.

Conclusions: ACS in patients placed on ECMO is a very rare condition with a considerable mortality rate but high secondary closure rate of the fascia. A necessary abdominal packing due to a severe bleeding seems to be a risk factor with a potentially fatal outcome.

Laparostomy and temporary abdominal closure outcomes in emergency non-trauma surgery and parameters affecting early definite primary fascial closure

BACKGROUND

The open abdomen or laparostomy is a great advance of surgery based on the concept of damage control surgery. Aim of the study is to review the laparostomy outcomes of non-trauma emergency surgery patients in a district general hospital and identify parameters affecting early definite primary fascial closure.

METHODS

The records of all non-trauma emergency surgical patients who underwent laparostomy in a three-year period in a single institute were studied retrospectively. Outcomes included length of stay, morbidity, mortality, readmission rates, number of re-look operations, rate of definite primary fascial closure and time to closure.

RESULTS

Thirty-two patients were included. Morbidity was 84.4% and mortality rates were 21.9% (in-hospital), 18.8% (30-day) and 46.9% (overall). Median length of hospital stay was 22 days. Rate of primary fascial closure was 87.5% and median time to closure was two days. The number of relook operations was the only independent prognostic factor of definite early primary fascial closure, with higher rates of closure in patients with 1-2 relooks.

CONCLUSIONS

Although the open abdomen has been demonstrated to improve survival, the precise role in abdominal sepsis has not been elucidated. Current consensus does not support use of open abdomen routinely, however in selected situations it becomes unavoidable. Laparostomy is a valid option in non-trauma emergency surgery and can be managed safely in a district hospital. High closure rates can be achieved if one or two re-look operations are performed with an early attempt for closure.

Open abdomen closure methods for severe abdominal sepsis: a retrospective cohort study

PURPOSE

The open abdomen (OA) procedure as part of damage control surgery represents a significant surgical advance in severe intra-abdominal infections. Major techniques used for OA are negative pressure wound therapy (NPWT) and non-NPWT. The aim of this retrospective study is to evaluate the effects of different abdominal closure methods and their outcomes in patients presenting with abdominal sepsis treated with OA.

MATERIALS AND METHODS

We retrospectively analyzed clinical outcomes of patients affected by severe intra-abdominal sepsis treated with OA. Demographic features, mortality prediction score, abdominal closure methods, length of hospital stay, complications and mortality rates of patients were determined and compared.

RESULTS

This study included 106 patients, of whom 77 underwent OA with NPWT and 29 with non-NPWT. OA duration was longer in NPWT patients (p = 0.007). In-hospital mortality rates in NPWT and in non-NPWT patients were 40.3% and 51.7%, respectively (p = 0.126), with an overall 30-day mortality rate of 18.2% and 51.7%, respectively (p = 0.0002). After emergency colorectal surgery, patients who underwent OA with NPWT had a lower rate of colostomy (p = 0.025).

CONCLUSIONS

NPWT is the best temporary abdominal closure technique to decrease mortality and colostomy rates in patients managed with OA for severe intra-abdominal infections.

A proposal for a comprehensive approach to infections across the surgical pathway

Despite evidence supporting the effectiveness of best practices in infection prevention and management, many healthcare workers fail to implement them and evidence-based practices tend to be underused in routine practice. Prevention and management of infections across the surgical pathway should always focus on collaboration among all healthcare workers sharing knowledge of best practices. To clarify key issues in the prevention and management of infections across the surgical pathway, a multidisciplinary task force of experts convened in Ancona, Italy, on May 31, 2019, for a national meeting. This document represents the executive summary of the final statements approved by the expert panel.

Dynamic closure techniques for treatment of an open abdomen: an update

BACKGROUND

The open abdomen (OA) is an important approach for managing intra-abdominal catastrophes and continues to be the standard of care. Despite this, challenges remain as it is associated with a high incidence of complications and poor outcomes. The objective is to perform a systematic review on dynamic closure techniques for fascial closure during open abdomen management.

METHODS

An electronic database search was conducted involving 4 different databases (MEDLINE (PubMed), SCOPUS, WEB OF SCIENCE (WOS) and EMBASE). All studies that described dynamic closure techniques in OA patients were eligible for inclusion. Data collected were synthesized by each outcome of interest.

RESULTS

Thirteen studies were included in the final synthesis. Overall methodological quality was low with a high number of retrospective observational studies and low number of patients. All included studies are observational cohort studies. No studies reported on the use of either Wittmann patch, dynamic retention sutures or ABRA system. Two studies reported on the ABRA system in combination with Negative Pressure Wound Therapy (NPWT), while 9 reported on mesh-mediated fascial traction (MMFT) combined with NPWT. Other types of fascial traction, either by dynamic suture lines or by a self-made silastic tube system, and NPWT were reported in 2 studies. Overall closure rates are 93.2% for the ABRA system + NPWT versus 72.0% for the mesh-mediated fascial traction + NPWT.

CONCLUSION

Careful selection and good management of OA patients will avoid prolonged treatment and facilitate early fascial closure. Future research should focus on comparison of different temporary dynamic closure techniques to evolve toward best treatment options, in terms of both fascial closure rates and long-term incisional hernia rates.

Open Abdomen in a Critically Ill Patient

One of the damage control strategies used to avoid or treat abdominal compartment syndrome is “open abdomen (OA),” where the facial edges and the skin is left open, exposing the abdominal viscera. Although it reduces the mortality both in trauma and non-trauma abdominal complications, it does create a significant challenge in an intensive care setting, as it has physiological consequences that need early recognition and prompt treatment both in the intensive care unit and in the operating room. The article aims to review literature on “open abdomen,” describe the challenges in such cases, and proposes a guideline for the intensivist in managing a patient with an OA.

How to cite this article: Mitra LG, Saluja V, Dhingra U. Open Abdomen in a Critically Ill Patient. Indian J Crit Care Med 2020;24(Suppl 4):S193–S200.

Abdominal Compartment Syndrome: Improving Outcomes With A Multidisciplinary Approach - A Narrative Review

Abdominal compartment syndrome (ACS) refers to a severe increase in intra-abdominal pressure associated with single or multiorgan failure. ACS with specific pathophysiological processes and detrimental outcomes may occur in a variety of clinical conditions. Patients with ACS are predominantly managed in critical care settings, however, a wide range of multidisciplinary interventions are frequently required from medical, surgical, radiological and nursing specialties. The medical management, aiming to prevent the progression of intra-abdominal hypertension to ACS, is extensively reviewed. Timing and techniques of surgical decompression techniques, as well as management of open abdomen, are outlined. In summary, the current narrative review provides data on history, definitions, epidemiology and pathophysiology of the syndrome and highlights the importance of multidisciplinary approach in the management of ACS in adults.

Role of serial lactate measurement to predict 28-day mortality in patients undergoing emergency laparotomy for perforation peritonitis: prospective observational study

Background

Serial lactate measurement is found to predict mortality in septic shock. Majority of patients with perforation peritonitis for emergency laparotomy are in sepsis and mortality rate is substantial. However, lactate dynamics has not been studied in this patient population.

Methods

After institutional ethics clearance and informed written consent, 113 patients with suspected or proven perforation peritonitis presenting for emergency laparotomy were recruited in this prospective observational trial. Baseline Mannheim peritonitis index (MPI), SOFA and APACHE II score were calculated. Lactate values were obtained at baseline, immediate and 24-h postoperative period. Primary outcome was 28-day mortality.

Results

Mortality was 15.04% at 28 days. Age, SOFA, qSOFA, APACHE, preoperative lactate, MPI and site of perforation were significantly different between survivors and non-survivors. Arterial lactate values at preoperative (cut off 2.75 mmol/L), immediate postoperative (cut off 2.8 mmol/L) and 24 h-postoperative period (cut off 2.45 mmol/L) independently predicted mortality at day 28. Combination of MPI and 24-h lactate value was best predictor of mortality with AUC 0.99.

Conclusion

Preoperative, immediate postoperative and 24-h postoperative lactate value independently predict 28-day mortality in perforation peritonitis patients undergoing emergency laparotomy. Combination of MPI and 24-h lactate value is the most accurate predictor of mortality.

Trial registration

Clinical Trial Registry of India - CTRI/2018/01/011103

Trends in open abdomen management in Italy: a subgroup analysis from the IROA project

Use of open abdomen (OA) progressively acquired increasing importance with the diffusion of the damage control management of critical patients. The purpose of the present study is to identify the state of the art about the use of OA in Italy, focusing on techniques, critical issues and clinical outcomes. A prospective analysis of adult patients enrolled in the IROA, limited to the Italian participating centres was performed. 375 patients were enrolled. Mean age was 64 ± 16 years old, 56% of the patients were male, mean BMI was 26.9 ± 5.2. Main indications for using OA were secondary peritonitis (32.5%), post-operative peritonitis (22.9%) and trauma (11.7%). Main OA techniques used were commercial negative pressure wound therapy (49.6%) and Bogotà bag (27.7%). Definitive closure of the abdomen was reached in 82.4% of patients after 6 ± 7 days of OA. The primary fascia closure rate was 84.7%. Overall mortality was 29.1%. The complication rate was 50.8%, with an enteroatmospheric fistula incidence: 7.5%. A univariate analysis performed on complication type found the duration of OA treatment (p = 0.024) to be statistically significant. Univariate analysis on mortality risk identified as significant age, duration of OA (in days) and pancreatitis as indication; multivariate analysis confirmed age (p < 0.001) and pancreatitis (p = 0.002) as statistically significant. A large variety of behaviours towards the patient requiring OA exists. A strong acceptance of common, recognized and evidence-based guidelines is essential, to obtain more uniformity in patient management and coherence of collected data, thus leading to improvement in outcomes and reduction of costs.

Open Abdomen in Obese Patients: Pay Attention! New Evidences from IROA, the International Register of Open Abdomen

BACKGROUND

Open abdomen is the cornerstone of damage control strategies in acute care and trauma surgery. The role of BMI has not been well investigated. The aim of the study was to assess the role of BMI in determining outcomes after open abdomen.

METHODS

This is an analysis of patients recorded into the International Register of Open Abdomen; patients were classified in two groups according to BMI using a cutoff of 30 kg/m². The primary outcome was in-hospital mortality; secondary outcomes were primary fascia closure rate, length of treatment, complication rate, entero-atmospheric fistula rate and length of ICU stay.

RESULTS

A total of 591 patients were enrolled from 57 centers, and obese patients were 127 (21.5%). There was no difference in mortality between the two groups; complications developed during the open treatment were higher in obese patients (63.8% vs. 53.4%, p = 0.038) while post-closure complications rate was similar. Obese patients had a significantly longer duration of the open treatment (9.1 ± 11.5 days vs. 6.3 ± 7.5 days; p = 0,002) and lower primary fascia closure rate (75.5% vs. 89.5%; p < 0,001). No differences in fistula rate were found. There was a linear correlation between the duration of open abdomen and the BMI (Pearson's linear correlation coefficient = 0,201; p < 0,001).

CONCLUSIONS

Open abdomen in obese patients seems to be safe as in non-obese patients with similar mortality; however, in obese patients the length of open abdomen is significantly higher with higher complication rate, longer ICU length of stay and lower primary fascia closure rate.

TRIAL REGISTRATION NUMBER

ClinicalTrials.gov, Identifier: NCT02382770.

Damage-Control Surgery for Obstetric Hemorrhage

Damage-control surgery (abdominopelvic packing followed by a period of medical stabilization in the intensive care unit) is a life-saving intervention usually reserved for critically injured patients who may not survive an attempt to achieve hemostasis and complete repair of the damage in the operating room. Most obstetricians have little or no experience in this area, although the use of damage-control surgery in selected cases may be life-saving. This approach should be considered when arterial bleeding has been controlled and persistent bleeding is deemed to be secondary to coagulopathy that is refractory to blood product replacement, particularly in the presence of hypothermia, acidosis, and vasopressor requirement. A prototypical (albeit hypothetical) case is described here in which damage-control surgery is indicated.

2019 WSES guidelines for the management of severe acute pancreatitis

Although most patients with acute pancreatitis have the mild form of the disease, about 20-30% develops a severe form, often associated with single or multiple organ dysfunction requiring intensive care. Identifying the severe form early is one of the major challenges in managing severe acute pancreatitis. Infection of the pancreatic and peripancreatic necrosis occurs in about 20-40% of patients with severe acute pancreatitis, and is associated with worsening organ dysfunctions. While most patients with sterile necrosis can be managed nonoperatively, patients with infected necrosis usually require an intervention that can be percutaneous, endoscopic, or open surgical. These guidelines present evidence-based international consensus statements on the management of severe acute pancreatitis from collaboration of a panel of experts meeting during the World Congress of Emergency Surgery in June 27-30, 2018 in Bertinoro, Italy. The main topics of these guidelines fall under the following topics: Diagnosis, Antibiotic treatment, Management in the Intensive Care Unit, Surgical and operative management, and Open abdomen.

Hypertonic saline resuscitation after emergent laparotomy and temporary abdominal closure

BACKGROUND

Our objective was to establish the safety of 3% hypertonic saline (HTS) resuscitation for trauma and acute care surgery patients undergoing emergent laparotomy and temporary abdominal closure (TAC) with the hypothesis that HTS administration would be associated with hyperosmolar hypercholoremic acidosis, lower resuscitation volumes, and higher fascial closure rates, without adversely affecting renal function.

METHODS

We performed a retrospective cohort analysis of 189 trauma and acute care surgery patients who underwent emergent laparotomy and TAC, comparing patients with normal baseline renal function who received 3% HTS at 30 mL/h (n = 36) to patients with standard resuscitation (n = 153) by baseline characteristics, resuscitation parameters, and outcomes including primary fascial closure and Kidney Disease: Improving Global Outcomes stages of acute kidney injury.

RESULTS

The HTS and standard resuscitation groups had similar baseline illness severity and organ dysfunction, though HTS patients had lower serum creatinine at initial laparotomy (1.2 mg/dL vs. 1.4 mg/dL; p = 0.078). Forty-eight hours after TAC, HTS patients had significantly higher serum sodium (145.8 mEq/L vs. 142.2 mEq/L, p < 0.001), chloride (111.8 mEq/L vs. 106.6 mEq/L, p < 0.001), and osmolarity (305.8 mOsm/kg vs. 299.4 mOsm/kg; p = 0.006), and significantly lower arterial pH (7.34 vs. 7.38; p = 0.011). The HTS patients had lower intravenous fluid (IVF) volumes within 48 hours of TAC (8.5 L vs. 11.8 L; p = 0.004). Serum creatinine, urine output, and kidney injury were similar between groups. Fascial closure was achieved for 92% of all HTS patients and 77% of all standard resuscitation patients (p = 0.063). Considering all 189 patients, higher IVF resuscitation volumes within 48 hours of TAC were associated with decreased odds of fascial closure (odds ratio, 0.90; 95% confidence interval, 0.83-0.97; p = 0.003).

CONCLUSION

Hypertonic saline resuscitation was associated with the development of a hypernatremic, hyperchloremic, hyperosmolar acidosis, and lower total IVF resuscitation volumes, without adversely affecting renal function. These findings may not be generalizable to patients with baseline renal dysfunction and susceptibility to hyperchloremic acidosis-induced kidney injury.

LEVEL OF EVIDENCE

Prognostic study, level II.

Blurring the boundary between open abdomen treatment and ventral hernia repair

PURPOSE

Therapeutic approaches for septic open abdomen treatment remain a major challenge with many uncertainties. The most convincing method is vacuum-assisted wound closure with mesh-mediated fascia traction with a protective plastic sheet placed on the viscera. As this plastic sheet and the mesh must be removed before final fascial closure, such a technique only allows temporary abdominal closure. This retrospective study analyzes the results of a modification of this technique allowing final abdominal closure using an anti-adhesive permeable polyvinylidene fluoride (PVDF) mesh.

METHODS

The outcome of all consecutive patients with septic open abdomen treatment at one academic surgical department from January 2013 to June 2015 was retrospectively analyzed.

RESULTS

Retrospectively, 57 severely ill consecutive patients with septic open abdomen treatment with a 30-day mortality of 26% and a 2-year mortality of 51% were included in the study. In 26 patients, no mesh was implanted; in 31 patients, mesh implantation was done at median third-look laparotomy, median 5 days postoperative. Re-laparotomies after mesh implantation (median n = 2) revealed anastomotic leakage in 16% but no new bowel fistula. In 40% of those patients who had mesh implantation, fascia closure was not achieved and the mesh was left in place in a bridging position avoiding planned ventral hernia.

CONCLUSION

The application of an anti-adhesive PVDF mesh for fascia traction in vacuum-assisted wound closure of septic open abdomen is novel, versatile, and seems to be safe. It offers the highly relevant possibility for provisional and final abdominal closure.