- Research article
- Open Access
Outcome of trauma-related emergency laparotomies, in an era of far-reaching specialization
World Journal of Emergency Surgeryvolume 14, Article number: 40 (2019)
Far reaching sub-specialization tends to become obligatory for surgeons in most Western countries. It is suggested that exposure of surgeons to emergency laparotomy after trauma is ever declining. Therefore, it can be questioned whether a generalist (i.e., general surgery) with additional differentiation such as the trauma surgeon, will still be needed and can remain sufficiently qualified. This study aimed to evaluate volume trends and outcomes of emergency laparotomies in trauma.
A retrospective cohort study was performed in the University Medical Center Utrecht between January 2008 and January 2018, in which all patients who underwent an emergency laparotomy for trauma were included. Collected data were demographics, trauma-related characteristics, and number of (planned and unplanned) laparotomies with their indications. Primary outcome was in-hospital mortality; secondary outcomes were complications, length of ICU, and overall hospital stay.
A total of 268 index emergency laparotomies were evaluated. Total number of patients who presented with an abdominal AIS > 2 remained constant over the past 10 years, as did the percentage of patients that required an emergency laparotomy. Most were polytrauma patients with a mean ISS = 27.5 (SD ± 14.9). The most frequent indication for laparotomy was hemodynamic instability or ongoing blood loss (44%).Unplanned relaparotomies occurred in 21% of the patients, mostly due to relapse of bleeding. Other complications were anastomotic leakage (8.6%), intestinal leakage after bowel contusion (4%). In addition, an incisional hernia was found in 6.3%. Mortality rate was 16.7%, mostly due to neurologic origin (42%). Average length of stay was 16 days with an ICU stay of 5 days.
This study shows a persistent number of patients requiring emergency laparotomy after (blunt) abdominal trauma over 10 years in a European trauma center. When performed by a dedicated trauma team, this results in acceptable mortality and complication rates in this severely injured population.
In the past decades, it is suggested that the exposure of most European surgeons to an emergency laparotomy in severely injured patients is declining . Penetrating injuries are a frequent indication for laparotomy in trauma patients [2, 3]. However, in most European countries, penetrating injuries are a rare phenomenon. In addition, most blunt trauma patients can nowadays be managed by non-operative management (NOM) [1, 4, 5]. This is in contrast to countries such as the USA and South Africa where exposure is higher due to high-volume presentation of trauma patients with penetrating abdominal injuries [1, 3, 6, 7]. The current challenge is to provide an adequate level of care with satisfactory outcome for trauma patients who require an emergency laparotomy in Europe .
In an era of ongoing sub-specialization, trauma surgery still requires a broad perspective and diverse skill set in order to provide adequate care for the most severely injured patients . However, nowadays, surgeons tend to specialize more than ever before into small areas of interest, something which is encouraged by governments and insurance companies. Furthermore, the reluctance of far-reaching centralization in trauma in combination with work hour regulations restrict exposure for surgeons in the European Union for this procedure . Therefore, it can be questioned if the knowledge and skillset required to perform such an emergency laparotomy in severely injured patients can be maintained . These developments might challenge the competence of the surgeons who deal with trauma patients with regard to an emergency laparotomy and, as a result, outcome of severely injured patients .
A major asset in the treatment of a trauma patient is knowledge of damage control concepts. Damage control surgery (DCS) can be performed in severely injured patients as part of the resuscitation process . In DCS, the goal is to reduce operating time as much as possible, preferably within 1–1.5 h, in which hemorrhage and contamination is controlled, while additional damage is prevented . Thereby limiting the lethal triad in trauma consisting of coagulopathy, hypothermia, and acidosis and provide the possibility to restore physiology . A single procedure is often not sufficient to gain control and patients are frequently brought back to the operating room for relaparotomy in support of further resuscitation. Although the damage control concept has reduced mortality over the last decades [14, 15], high morbidity and mortality rates remain, especially in patients who arrive in extremis at the emergency department [2, 3, 16]. The mortality rate of patients undergoing a trauma laparotomy is reported up to 21%, with exsanguination accounting for 60% of these deaths, even in high volume centers .
The aim of this study was to evaluate the outcome after an emergency laparotomy in trauma patients, performed in a Dutch level 1 trauma center.
A published study protocol does not exist. A single-center retrospective observational cohort study was performed in the University Medical Center Utrecht (UMCU), a large teaching hospital and designated level I trauma center in the Netherlands.
In our hospital, the team of trauma surgeons exists of 5–8 trauma surgeons (depending on the time period within the study) with one or two trauma fellows. In the past years, a trauma surgeon is physically present in the hospital 24 h, 7 days a week. In our center, all crash-room activated trauma calls and subsequent surgical procedures (both truncal and musculoskeletal) are directly supervised or carried out by a certified trauma surgeon, with a background in general surgery . We have approximately 1800 trauma activations per year with nearby 200 per year arriving in severe shock. However, this depends on the definition of ‘in shock.’ A bit more patients are triaged in ‘Red’ (300 per year), compared to being in shock (220) based on the clinical parameters in the hospital (after resuscitation by the paramedics and Mobile Medical Team by helicopter). Of all trauma team activations, 1400 patients are admitted yearly with on average 365 of them for polytrauma (ISS > 15), above that we admit 400 complex mono injuries (mostly after high energy mechanism) and 500 isolated neurologic injuries every year. We have a strong lateralization in our inclusive trauma system, with most non-complex injuries being treated in the level 2 and 3 hospitals in the region.
Every laparotomy following trauma is performed by two trauma surgeons. All together, this means a trauma surgeon performs an average of five to ten index laparotomies for trauma per year in our center. Additional procedures after the index operation come on top of this including delayed reconstructions. To maintain the skill set needed for a trauma surgeon, every member of the staff is current at Definitive Surgical Trauma Care Course (DSTC)® and several are instructors on this course. Furthermore, we perform additional annual training in the wet lab and two times per year we do cadaver training with our team.
The performance of a laparotomy in trauma and damage control surgery
Damage control surgery in trauma patients has been previously extensively described [18, 19] as has the concept of Dutch trauma surgery . The indication for an emergency laparotomy is based on patient’s physiology as indicated by vital signs (pulse rate, blood pressure, urine output, temperature) and laboratory findings (coagulation, base deficit, hemoglobin levels) . The objective is to complete the procedure within 60–90 min . If appropriate, the abdomen is temporary closed, preferably with a vac-pack . Furthermore, the trauma surgeon is actively involved in the subsequent ongoing resuscitation of trauma patients in intensive care unit (ICU) and in the indication and timing of further surgical procedures, either truncal or skeletal . The re-laparotomy for definitive surgical care, if indicated, is planned as soon as physiologic (mainly hemodynamic) stability was achieved. An unplanned re-laparotomy was defined as a laparotomy forced by deterioration of the patient, such as ongoing or renewed blood loss, intra-abdominal infection, bile leakage, or fascial dehiscence.
A systemic approach was used to perform the initial emergency trauma laparotomy in hemodynamically unstable patients as described previously. In short, laparotomy is started with midline incision from xiphoid process to the pubic bone. After opening the abdominal cavity, blood and blood clots are removed. All quadrants of the abdomen are then systematically packed using large gauzes. Each abdominal quadrant is inspected for injuries. Surgical management is performed to stop the bleeding and to prevent (further) contamination of the abdomen. If arterial bleeding is insufficiently controlled, additional angioembolization is utilized. Unfortunately, no hybrid operation room (OR) is structurally available for trauma in our hospital, resulting in extra transport times for (combined) endovascular procedures.
All consecutive patients who underwent an emergency laparotomy directly related to trauma between January 2008 and January 2018 were included. All patients were initially assessed and treated following Advanced Trauma Life Support (ATLS) guidelines by dedicated Dutch trauma surgeons in a Level-1 trauma center (trained in both general surgery and orthopedic surgery for trauma). Patients were identified using the hospital surgical registration system. Patients of all ages were included. All data were extracted from the prospective trauma center database and supplemented with information from the electronic patient medical records.
The collected data of the included patients were demographics: age, gender, weight, length, body mass index (BMI), American Association of Anesthesiologists (ASA) classification, smoking, diabetes, previous abdominal surgery, and cardiopulmonary history. If comorbidities were not noted in the electronic patient file, it was assumed as being absent in the patient. This means that for instance diabetes was assumed absent if the patient was not under supervision of a doctor for treatment, and did not use any medication for diabetes nor diabetes was mentioned in the medical history. ASA classification was calculated based on the known comorbidities at time of trauma. Furthermore, the following trauma-related characteristics were noted: the condition of the patient at arrival and their injuries were noted, trauma mechanism (fall lower than 3 m, fall higher than 3 m, car accident, motorcycle accident, scooter accident, bicycle accident, pedestrian accident, stabbing, shooting, entrapment, and other causes), alcohol consumption at the moment of the event, Injury Severity Score (ISS), relevant blood results (hemoglobin, pH, and base deficit), Glasgow Coma Scale (GCS), and systolic blood pressure, the latter two both on arrival in ED. The ISS was calculated through trauma registry specialists and verified by dedicated trauma staff. In addition, the number of (planned and unplanned) laparotomies per patient were collected and the indication for any surgical intervention was noted. Other collected data were presence of a CT-scan prior to laparotomy, time to laparotomy, found injuries, procedure time, and procedures performed. If the inferior caval vein, aorta, celiac artery, superior mesenteric artery, superior mesenteric vein, or iliac veins were involved, it was noted as large vessel injuries. An unplanned re-laparotomy was defined as any laparotomy performed after the initial trauma laparotomy but not planned to provide (further) definitive surgical care. All variables were established before data extraction was performed.
The in-hospital mortality was noted as primary outcome. In addition, the cause of mortality was extracted from the records. Secondary outcomes were complications, length of ICU, and overall hospital stay. Complications included unplanned re-laparotomies, re-bleeding, and failure of intestinal anastomosis.
Data and statistical analysis
Continuous parametric data were presented as means with standard deviations; continuous non-parametric data were presented as medians with interquartile ranges (IQRs); dichotomous and categorical data as frequencies with percentages. The cause of in-hospital mortality was stratified by GCS and the systolic blood pressure on arrival. A P value < 0.05 was considered statistically significant. All statistical analyses were performed using Statistical Package for the Social Sciences (IBM Corp. Released 2011. IBM SPSS Statistics for Windows, Version 20.0. Armonk, NY: IBM Corp.). Data analysis was performed with full anonymity of the included patients. This study was performed according to the Institutional Review Board (IRB) medical ethics standards. The IRB concluded that approval by an ethics committee was not applicable and a waiver was provided (16-702/C).
During the study period, 267 consecutive trauma patients underwent 268 index emergency laparotomies directly after or as part of resuscitation. The mean age was 42.5 years (± 30.8, range 3 to 83 years). Twenty patients were younger than 18 years. Most patients were males (n = 177; 66%). Twenty-three percent (n = 63) of the studied population suffered from psychiatric illness that required psychiatric support. Furthermore, most patients could be considered as healthy with an ASA 1 or 2 classification and a limited number of comorbidities (Table 1). The total number of patients who presented with an abdominal AIS > 2 remained similar over the past 10 years (Fig. 1a, b) as did the percentage of patients who required an emergency laparotomy.
Injury mechanism and severity
The main causes of trauma were road traffic accidents (n = 156; 58%) followed by penetrating injuries (n = 58; 21%) and falls (n = 36; 13%). Most patients were polytrauma patients, who also suffered head, chest, pelvic, and/or extremity injuries (Table 1). The mean ISS was 27.5 (± 14.9; range 1 to 75). This also resulted in a severe physiological derangement in most patients, expressed by a mean systolic blood pressure of 108 mmHg (± 33), a GCS of 10 (± 5), a hemoglobin of 7 (± 2) mmol/L, a pH of 7.26 (± 0.17), and a base deficit of 5.8 (± 7.6) mEq/L.
Injuries and treatment
The most frequent indication for laparotomy was hemodynamic instability or ongoing blood loss from either an intra-abdominal or retroperitoneal source during resuscitation. Nearly all patients were in the operating room within 2 h, while 62% of the patients underwent pre-operative CT-scanning (Table 2). The 38% without CT-scanning prior to surgery were prompted for laparotomy either by hemodynamic instability (n = 99) or penetrating injury (n = 26). A wide variety of injuries was found, with spleen, liver, and colon injuries in at least a quarter of all patients. Furthermore, retroperitoneal vascular injuries occurred frequently and an assessment was made to resect or wait-and-see on bowel or mesenteric contusion in 94 patients (35%). Damage control procedures with abbreviated surgery were performed in 105 patients (39%). The average time of a laparotomy was 62 min (± 30). One hundred nine patients (41%) had two or more laparotomies, with a total number of 484 abdominal explorations performed. Surgical procedures during these explorations were diverse, including packing, intestinal resections, vascular repair, and intestinal anastomosis. Surgical treatment of a delayed cecum blow-out occurred in seven patients (2.6%). Intestinal anastomosis was performed in 46 patients with a total of 62 anastomoses. Forty laparotomies were considered non-therapeutic, which were divided on both penetrating and blunt trauma patients. Sixteen of these non-therapeutic laparotomies were for penetrating injuries. Another six patients underwent a laparotomy for severe abdominal pain, which afterwards appeared negative. The remaining negative laparotomies were performed in patients in extremis, following a resuscitation thoracotomy or an inconclusive FAST. There was no significant relationship between negative laparotomy and the usage of pre-operative CT-scan in penetrating trauma, while in the latter patient category, no CT-scan was performed due to the physiological condition of the patient not allowing us to do so.
The average length of stay was 16 days (SD 20.4), with an ICU stay of 5 days (SD 8.8). A total of 45 (16.7%) patients deceased during their hospital stay. Most patients deceased due to central nervous system failure after severe brain injury (19 out of 45 deaths; 42%, Tables 3 and 4). Patients who arrived with a systolic blood pressure below 90 mmHg had a higher mortality rate (26 out of 69; 37%) compared to patients with a systolic pressure of 90 mmHg or higher (19 out of 199; 9%, P < 0.001). Patients who died were older, had a higher ISS, and worse physiology (by GCS, systolic blood pressure, hemoglobin, pH, base deficit) compared to those who survived (Table 2). The other main cause of death was persistent blood loss, either retroperitoneal in diffuse injuries, or more specifically from aorta or (retro-hepatic) caval vein injuries (Table 2).
Fourteen of the 132 patients (11%) who underwent laparotomy for hemodynamic reasons died due to exsanguination.
Unplanned laparotomies occurred in 58 patients (21%) of which 22 were due to relapse of bleeding. In 16 of these patients, rebleeding occurred after adequate resuscitation and return of normal blood pressure was achieved. In six patients, severe coagulopathy was present at this stage, while in ten other patients, diffuse venous (often (retro-hepatic) bleeding occurred despite packing (Table 5).
Anastomotic leakage occurred in 8.6% (6/69) of all anastomoses. Most of the anastomoses were performed early during the first 2 days after the trauma (55/69); the remaining 14 anastomoses were made during a delayed index laparotomy for a secondary problem (2–4 days after trauma, secondary problems such as ileus, secondary extension of contusion over time, or cecum blow-out). Patients who received an anastomosis in a second procedure following an index laparotomy in damage control surgery were grouped in the first category of early anastomosis. Four patients developed an anastomotic leakage (7.2%) within the early anastomosis group, compared to two patients following an anastomosis after delayed presentation (14.2%).
Furthermore, in 4/94 (4%) cases, an error in judgment regarding the severity of bowel contusion led to intestinal leakage after several days. Incisional hernia occurred in 17 patients (6.3%) and enterocutaneous fistula occurred in one patient (0.4%).
This study demonstrated a steady number of patients who required an emergency laparotomy after trauma performed by a dedicated trauma surgeon in the past decade, with acceptable mortality and complication rates. This study highlights the importance of the preservation of a diverse skillset and experience-based decision making, with dedication to severely injured patients.
A mortality rate of 16.7% was found in the current cohort series, which is comparable to recent literature with mortality rates ranging from 7 to 17% [24,25,26]. In almost half of our patients, cause of death was considered neurological. Patients who died due to exsanguination were in extremis and suffered severe physiological derangement at presentation with low pH and high base deficit. These findings of severe physiological disturbances are comparable to a large study from Harvin et al., who found an overall mortality rate of 21%, although with slightly different inclusion criteria, since they excluded patients below the age of 18 . A difference between these two case series should be noted, as in the present study most patients died due to neurological injuries, while 65% of deaths was due to hemorrhage by Harvin et al. . This might be a consequence of the differences in numbers of penetrating injuries, which are a frequent indication for laparotomy in the USA or South Africa compared to the Netherlands [27, 28].
Damage control principles were executed in almost 40% of these patients, which require a considerably different decision making strategy compared to an elective orientated process. Trauma surgery often entails easy procedures with complex decision making. The need for a broad skill set and specific expertise is signified by the fact that the patients in this study were severely injured, physiologically deranged, suffered a wide variety of injuries, and required many different intra-abdominal procedures. A dedicated team maintains expertise by ongoing training; for example, the definitive surgical trauma care (DSTC) course . Furthermore, training on the job and protocolized decision making should be institutionalized. Although trauma surgery might be a subspecialty, this specialism however has a wide scope, broad foundation, and therefore with respect to content can be seen as a generalist. Other studies in Europe identified inadequate source control as important cause of (potentially) preventable deaths and assigned this to insufficient expertise [3, 29]. There were 6/132 (4.5%) patients with inadequate source control in the present study. Most of the patients suffering rebleeds were of venous origin after adequate resuscitation demanding the surgeon to stay on top of his/her patient as the resuscitation itself places the patient at risk for deterioration.
Decision making in trauma and critical care is a dynamic process which is accentuated by the patients who required an unplanned relaparotomy. The major reasons for unplanned relaparotomy were bleeding and fecal contamination. Besides damage control laparotomy, resuscitation has a significant role in the treatment of trauma patients with abdominal injuries . After initial damage control surgery with abdominal packing and adequate resuscitation with return of blood volume and pressure, an unplanned laparotomy was prompted mostly due to a diffuse venous rebleed, especially from perihepatic and retroperitoneal origin (11/25). Knowledge of these possible progressions after abdominal trauma is essential for early recognition and treatment .
Secondary fecal contamination was found in six patients, either after secondary extension of bowel contusion over time (4/94 judgements; 4%), or after cecum blow-out. Bowel contusion remains a difficult problem both with regard to diagnoses as well as treatment, and highly depends on experience-based decision making [32,33,34]. An additional six patients developed anastomotic leakage. These results are comparable to literature with anastomotic leakage rates of 2–15% following trauma [35,36,37,38,39]. There was a relatively high number of patients who needed a laparotomy several days after the initial trauma in whom a primary anastomosis was performed (2/14 anastomoses > 48 h; 14.2%). In comparison, 7.2% of the anastomoses developed leakage in patients who underwent their index laparotomy within 2 h after trauma (4/55 anastomoses). This indicates an underestimation of either the bowel condition or the patient’s condition in the delayed group. Patients with delayed laparotomy frequently turned out to have a history of severe alcohol or drugs abuse, which was not apparent during the first days of their admission.
Finally, the non-therapeutic laparotomies could be divided in several groups as well. First, as a result of penetrating injury with disruption of the peritoneum, which in our hospital protocol dictates surgical exploration. Second, severe abdominal pain disproved to be an adequate sole indicator for bowel injury (as this indication resulted in a large number of non-therapeutic laparotomies). Furthermore, non-therapeutic laparotomies were found in conjunction to resuscitation with a resuscitation thoracotomy and either an inconclusive or positive FAST. This can be considered inherent to the patient’s condition and necessity to rule out abdominal blood loss as contributing factor (i.e., during surgery for severe pelvic or chest injury) in the absence of more advanced diagnostic modalities. The role of a pre-operative CT scan can be discussed. When hemodynamically possible, patients will undergo pre-operative CT-scanning. In hemodynamic instability, there is actually no role for CT-scan; even with optimized logistics, this might not be desirable. However, we might have some profit on that behalf when the availability for a CT-scan is easier. Second, our hospital protocol indicates that every penetrating injury in which the fascia is damaged, an exploratory laparotomy must be performed. In half of those patients with negative laparotomy after penetrating trauma, a pre-operative CT-scan was performed.
A similar percentage of patients who required emergency laparotomy after trauma was found compared to other European studies from level 1 trauma centers in the past decades [3, 40]. It is therefore likely that this percentage will remain steady in the near future. Although 10 years ago concerns were raised to maintain sufficient expertise in these settings, the residency program and ongoing training programs demonstrate similar or even somewhat improved outcomes in the current study . Furthermore, dedication to trauma both with regard to physicians and logistics might have contributed to these results . A trauma center should be prepared for the severely injured trauma patient that requires an emergency laparotomy. A rapid and adequate response to hemodynamically unstable patients is required to lower mortality rates [42, 43]. In our hospital, it is the trauma surgeon with a background in general surgery who is leading the trauma team and performs all truncal and musculoskeletal (damage control) operative procedures. Nearly all patients arrived in the operating room within a reasonable short timeframe and the average operation time was 62 min. It should be noted that in our hospital, no CT scan is available in the crash room (which leads to transfer times), and there is no trauma dedicated hybrid operating room [44,45,46,47,48,49,50]. These factors did have major impact on the decision making represented in the present study, but might be considered difficult to extract in a retrospective design. However, despite the limitations of a retrospective study design, essential information was over 90% complete, which makes the outcome data rather robust. Thus, optimizing logistics for both surgical procedures and resuscitation might further improve mortality and functional outcomes.
Regardless of all the advances in the non-operative management of blunt abdominal trauma patients, a persistent number of injured patients require an emergency laparotomy. A dedicated surgical team with experience and maintenance in damage control surgery can achieve acceptable outcomes in terms of mortality and morbidity rates, although further centralization of these patients might be warranted to further optimize logistics and efficiency.
Availability of data and materials
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
Damage control surgery
University Medical Center Utrecht
Intensive care unit
Advanced trauma life support
American Society of Anesthesiologists
Injury Severity Score
Glasgow Coma Scale
Institutional review board
Definitive surgical trauma care
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