Timing of Laparotomy and Closure in Burn Patients with Abdominal Compartment Syndrome: Effects on Survival

VARIABLES INFLUENCING THE DIFFERENTIAL HOST RESPONSE TO BURNS IN PEDIATRIC AND ADULT PATIENTS

ABSTRACT

Burn injury is a significant source of morbidity and mortality in the pediatric population. Although 40,000 pediatric patients in the United States are admitted to the hospital with burn wounds annually, significant differences exist in the management and treatment of these patients, even among highly specialized burn centers. Some aspects of pediatric burn research, such as metabolic changes and nutritional support after burn injury, have been studied extensively; however, in many aspects of burn care, pediatric research lags behind the study of adult populations. This review compares and contrasts a wide array of physiologic and immune responses between children and adults after burn injury. Such a review elucidates where robust research has been conducted, where adult research is applicable to pediatric patients, and where additional pediatric burn research needs to be conducted.

Case Report: Tachycardia, Hypoxemia and Shock in a Severely Burned Pediatric Patient

Background

Severely burned children are at high risk of secondary intraabdominal hypertension and abdominal compartment syndrome (ACS). ACS is a life-threatening condition with high mortality and requires an effective, minimally invasive treatment to improve the prognosis when the condition is refractory to conventional therapy.

Case presentation

A 4.5-year-old girl was admitted to our hospital 30 h after a severe burn injury. Her symptoms of burn shock were relieved after fluid resuscitation. However, her bloating was aggravated, and ACS developed on Day 5, manifesting as tachycardia, hypoxemia, shock, and oliguria. Invasive mechanical ventilation, vasopressors, and percutaneous catheter drainage were applied in addition to medical treatments (such as gastrointestinal decompression, diuresis, sedation, and neuromuscular blockade). These treatments did not improve the patient's condition until she received continuous renal replacement therapy. Subsequently, her vital signs and laboratory data improved, which were accompanied by decreased intra-abdominal pressure, and she was discharged after nutrition support, antibiotic therapy, and skin grafting.

Conclusion

ACS can occur in severely burned children, leading to rapid deterioration of cardiopulmonary function. Patients who fail to respond to conventional medical management should be considered for continuous renal replacement therapy.

Abdominal Compartment Syndrome-When Is Surgical Decompression Needed?

Compartment syndrome occurs when increased pressure inside a closed anatomical space compromises tissue perfusion. The sudden increase in pressure inside these spaces requires rapid decompression by means of surgical intervention. In the case of abdominal compartment syndrome (ACS), surgical decompression consists of a laparostomy. The aim of this review is to identify the landmarks and indications for the appropriate moment to perform decompression laparotomy in patients with ACS based on available published data. A targeted literature review was conducted on indications for decompression laparotomy in ACS. The search was focused on three conditions characterized by a high ACS prevalence, namely acute pancreatitis, ruptured abdominal aortic aneurysm and severe burns. There is still a debate around the clinical characteristics which require surgical intervention in ACS. According to the limited data published from observational studies, laparotomy is usually performed when intra-abdominal pressure reaches values ranging from 25 to 36 mmHg on average in the case of acute pancreatitis. In cases of a ruptured abdominal aortic aneurysm, there is a higher urgency to perform decompression laparotomy for ACS due to the possibility of continuous hemorrhage. The most conflicting recommendations on whether surgical treatment should be delayed in favor of other non-surgical interventions come from studies involving patients with severe burns. The results of the review must be interpreted in the context of the limited available robust data from observational studies and clinical trials.

Abdominal compartment syndrome in burns patients: Introduction of an evidence-based management guideline and algorithm

ABSTRACT

Abdominal compartment syndrome is a serious potential complication of burn injury, and carries high morbidity and mortality. Although there are generalised published guidelines on managing the condition, to date no management algorithm has yet been published tailored specifically to the burn injury patient. We set out to examine the literature on the subject in order to produce an evidence based management guideline, with the aim of improving outcomes for these patients. The guideline covers early detection and assessment of the condition as well as optimum medical, surgical and postoperative management. We believe that this guideline provides a much needed benchmark for managing burns patients with raised intra-abdominal pressure, as well as providing a template for further research and improvements in care.

Prevalence of intra-abdominal hypertension and markers for associated complications among severe burn patients: a multicenter prospective cohort study (BURNIAH study)

PURPOSE

Severely burned patients are at risk for intra-abdominal hypertension (IAH) and associated complications such as organ failure, abdominal compartment syndrome (ACS), and death. The aim of this study was to determine the prevalence of IAH among severely burned patients. The secondary aim was to determine the value of urinary intestinal fatty acid binding protein (I-FABP) as early marker for IAH-associated complications.

METHODS

A prospective observational study was performed in two burn centers in the Netherlands. Fifty-eight patients with burn injuries ≥ 15% of total body surface area (TBSA) were included. Intra-abdominal pressure (IAP) and urinary I-FABP, measured every 6 h during 72 h. Prevalence of IAH, new organ failure and ACS, and the value of urinary intestinal fatty acid binding protein (I-FABP) as early marker for IAH-associated complications were determined.

RESULTS

Thirty-one (53%) patients developed IAH, 17 (29%) patients developed new organ failure, but no patients developed ACS. Patients had burns of 29% (P₂₅-P₇₅ 19-42%) TBSA. Ln-transformed levels of urinary I-FABP and IAP were inversely correlated with an estimate of - 0.06 (95% CI - 0.10 to - 0.02; p = 0.002). Maximal urinary I-FABP levels had a fair discriminatory ability for patients with IAH with an area under the ROC curve of 74% (p = 0.001). Urinary I-FABP levels had no predictive value for IAH or new organ failure in severe burn patients.

CONCLUSIONS

The prevalence of IAH among patients with ≥ 15% TBSA burned was 53%. None of the patients developed ACS. A relevant diagnostic or predictive value of I-FABP levels in identifying patients at risk for IAH-related complications, could not be demonstrated.

LEVEL OF EVIDENCE

Level III, epidemiologic and diagnostic prospective observational study.

Timing of surgical intervention for compartment syndrome in different body region: systematic review of the literature

Compartment syndrome can occur in many body regions and may range from homeostasis asymptomatic alterations to severe, life-threatening conditions. Surgical intervention to decompress affected organs or area of the body is often the only effective treatment, although evidences to assess the best timing of intervention are lacking. Present paper systematically reviewed the literature stratifying timings according to the compartmental syndromes which may beneficiate from immediate, early, delayed, or prophylactic surgical decompression. Timing of decompression have been stratified into four categories: (1) immediate decompression for those compartmental syndromes whose missed therapy would rapidly lead to patient death or extreme disability, (2) early decompression with the time burden of 3-12 h and in any case before clinical signs of irreversible deterioration, (3) delayed decompression identified with decompression performed after 12 h or after signs of clinical deterioration has occurred, and (4) prophylactic decompression in those situations where high incidence of compartment syndrome is expected after a specific causative event.

Intraabdominal hypertension/abdominal compartment syndrome after pelvic fractures: How they occur and what can be done?

BACKGROUND

Limited data exist regarding intraabdominal hypertension/abdominal compartment syndrome (IAH/ACS) after pelvic fractures. We aimed to explore risk factors for IAH/ACS in pelvic fracture patients, assess the physiological effects of decompressive laparotomy (DL) on IAH/ACS, and generate an algorithm to manage IAH/ACS after pelvic fracture.

MATERIALS AND METHODS

Pelvic fracture patients were included based on the presence of IAH/ACS. Intraabdominal pressure (IAP) was measured through a Foley catheter. DL was performed in patients with refractory IAH or ACS. Multivariable linear regression was applied to assess associations between IAP levels (≥12 mmHg) and age, sex, injury severity score (ISS), pelvic fracture, volume of resuscitation fluids over 24 h and hemoglobin values. The Wilcoxon signed-rank test for paired samples was used to compare variables before and after DL.

RESULTS

Among 455 pelvic fracture patients, 44 (9.7%) and 5 (1.1%) were diagnosed with IAH and ACS, respectively. The volume of resuscitation fluids over 24 h exhibited a significant positive correlation with IAP levels (≥12 mmHg) (p = 0.002). The main findings during DL were edematous bowel (11/20) and retroperitoneal hematoma (7/20). DL caused a significant decrease in the mean IAP from 24.4 ± 8.5 mmHg to 13.4 ± 4.0 mmHg (p < 0.0001). Physiological parameters (APP, PaO2/FIO2 ratio, PIP, arterial lactate and UOP) were significantly improved after DL. The mortality rate was 15% in patients who underwent DL and 40% in ACS patients.

CONCLUSIONS

IAH/ACS is common in pelvic fracture patients. The most effective method to decrease IAP in pelvic fracture patients is DL. Prophylactic DL is important for decreasing mortality as it prevents IAH from progressing to ACS. Massive fluid resuscitation is a significant risk factor for IAH/ACS. A pathway incorporating prophylactic/therapeutic DL and optimized fluid resuscitation to prevent and manage IAH/ACS after pelvic fractures may reduce morbidity and mortality.