Approach to the management of complex hepatic injuries

Multicenter Study of Perioperative Hepatic Angioembolization as an Adjunct for Management of Major Operative Hepatic Trauma

BACKGROUND

The management of major liver trauma continues to evolve in trauma centers across the US with increasing use of minimally invasive techniques. Data on the outcomes of these procedures remain minimal. The objective of this study was to evaluate patient complications after perioperative hepatic angioembolization as an adjunct to management of major operative liver trauma.

STUDY DESIGN

A retrospective multi-institutional study was performed at 13 level 1 and level 2 trauma centers from 2012 to 2021. Adult patients with major liver trauma (grade 3 and higher) requiring operative management were enrolled. Patients were divided into 2 groups: angioembolization (AE) and no angioembolization (NO AE). Univariate and multivariate analyses were performed.

RESULTS

A total of 442 patients were included with AE performed in 20.4% (n = 90 of 442) of patients. The AE group was associated with higher rates of biloma formation (p = 0.0007), intra-abdominal abscess (p = 0.04), pneumonia (p = 0.006), deep vein thrombosis (p = 0.0004), acute renal failure (p = 0.004), and acute respiratory distress syndrome (p = 0.0003), and it had longer ICU and hospital length of stay (p < 0.0001). On multivariate analysis, the AE had a significantly higher amount intra-abdominal abscess formation (odds ratio 1.9, 95% CI 1.01 to 3.6, p = 0.05).

CONCLUSIONS

This is one of the first multicenter studies comparing AE in specifically operative high-grade liver injuries and found that patients with liver injury that undergo AE in addition to surgery have higher rates of both intra- and extra-abdominal complications. This provides important information that can guide clinical management.

Liver Transplant After Severe Liver Trauma: The First Report in a Korean Adult

Following a motor-vehicle accident, a 57-year-old man was diagnosed with a grade 4 liver injury (American Association for the Surgery of Trauma organ injury scale) with multiple contrast extravasations. He initially underwent nonoperative management, which included transcatheter arterial embolization. However, he experienced a hemorrhage after the first embo-lization procedure, and so the procedure was repeated. Thereafter, he was diagnosed with liver failure based on findings from computed tomography and liver function tests. On day 28 of hospitalization, the patient underwent deceased donor liver transplant. He experienced several complications, including acute renal failure, pneumonia, and bile leak. These were managed successfully, and the patient was discharged 4 months after the transplant. Although liver transplant procedure for hepatic trauma is technically challenging and risky, it should be considered a viable treatment option in some patients (such as patients with severe liver injury). This is the first reported case, to our knowledge, of a liver transplant performed successfully in a patient with severe hepatic trauma in Korea.

Emergent vessel embolization for major traumatic and non-traumatic hemorrhage: Indications, tools and outcomes

Endovascular embolization of bleeding vessels in trauma and non-trauma patients is frequently used and is an important tool for bleeding control. It is included in the EVTM (endovascular resuscitation and trauma management) concept and its use in patients with hemodynamic instability is increasing. When the correct embolization tool is chosen, a dedicated multidisciplinary team can rapidly and effectively achieve bleeding control. In this article, we will describe the current use and possibilities for embolization of major hemorrhage (traumatic and non-traumatic) and the published data supporting these techniques as part of the EVTM concept.

Gunshot wound versus blunt liver injuries: different liver-related complications and outcomes

PURPOSE

Severe hepatic injury due to gunshot (GSW) compared to blunt mechanism may have significantly different presentation, management, complications, and outcomes. The aim of this study was to identify the differences.

METHODS

Retrospective single-center analysis June 1, 2015-June 30, 2020, included all patients with Grade III-V liver injuries due to GSW or blunt mechanism. Clinical characteristics, severity of injury, liver-related complications (rebleeding, necrosis/abscess, bile leak/biloma, pseudoaneurysm, acute liver failure) and overall outcomes (mortality, hospital length of stay, intensive care unit length of stay, and ventilatory days) were compared.

RESULTS

Of 879 patients admitted with hepatic trauma, 347 sustained high-grade injury and were included: 81 (23.3%) due to GSW and 266 (76.7%) due to blunt force. A significantly larger proportion of patients with GSW were managed operatively (82.7 vs. 36.1%, p < 0.001). GSW was associated with significantly more liver-related complications (40.7% vs. 27.4%, p = 0.023), specifically liver necrosis/abscess (18.5% vs. 7.1%, p = 0.003) and bile leak/biloma (12.3% vs. 5.3%, p = 0.028). On subgroup analysis, in patients with grade III injury, the incidence of liver necrosis/abscess and bile leak/biloma remained significantly higher after GSW (13.9% vs. 3.1%, p = 0.008 and 11.1% vs. 2.5%, p = 0.018, respectively). In sub analysis of 88 patients with leading severe liver injuries, GSW had a significantly longer hospital length of stay, ICU length of stay, and ventilator days.

CONCLUSION

GSW mechanism to the liver is associated with a higher incidence of liver-related complications than blunt force injury.

Survival following devastating penetrating gunshots polytrauma with grade 5 liver injuries requiring multiple massive transfusion protocols: A case report and review of the literature

Introduction

A devastating injury to the liver from a gunshot wound (GSW) challenges the most seasoned trauma surgeon. This challenge is intensified when patients develop severe shock with a high-grade injury. We present the case of a patient with a grade 5 liver injury after a GSW treated with operative and interventional radiology (IR) treatment simultaneously.

Case presentation

A 25-year-old male presented to our Trauma Center with hypotension, after an abdominal GSW. He was taken emergently to the operating room, which revealed a Grade 5 liver injury with massive hemorrhage. Operative intervention was initiated immediately and a non-anatomic left lobectomy with hepatorrhaphy was performed. IR was consulted intra-operatively and performed a left hepatic artery angioembolization. The patient received over 50 units of blood products during the combined procedures, with eventual bleeding control. On post-operative day 33, the patient became acutely hemodynamically unstable, and angiography revealed a splenic artery pseudoaneurysm, which was embolized but re-bled and resulted in splenectomy. The patient eventually recovered and follows up at 1-year revealed a patient doing well.

Discussion

High-grade liver injuries carry significant mortality. Mortality worsens when severe shock is present. Operative intervention is the standard approach for patients who remain in shock. To help improve outcomes patients may benefit from a combined approach with the interventional radiology team.

Conclusion

The acute management of severe liver injuries when presenting with ongoing shock is beneficial to include both trauma surgeons with interventional radiologists. Further studies are needed to determine the best approach for this devastating injury.

•

Severe hepatic injuries may require both operative management & angioembolization.

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Class 4 hemorrhagic shock often requires a massive transfusion protocol.

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Algorithms for operative/angiographic treatment of liver/spleen injuries are needed.

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Delayed hemorrhage after angioembolization for splenic pseudoaneurysm can occur.

The American Association for the Surgery of Trauma (AAST) Liver Injury Grade Does Not Equally Predict Interventions in Blunt and Penetrating Trauma

INTRODUCTION

The AAST liver injury grade has a validated association with mortality and need for operation. AAST liver injury grade is the same regardless of the mechanism of trauma.

METHODS

A 5-year retrospective review of all liver injuries at an urban, level-one trauma center was performed.

RESULTS

Totally, 315 patients were included (29% blunt, 71% penetrating). In blunt trauma, AAST grade was associated with need for laparotomy (0%, 7%, 5%, 33%, 29%, Grade 1-5, p = 0.01), angiography (0%, 7%, 25%, 40%, 57%, p < 0.001), embolization (0%, 7%, 15%, 33%, 43%, p = 0.01), and percutaneous drainage procedures (13% use in Grade 4, otherwise 0%, p = 0.04), but not ERCP (0% for all grades). In penetrating trauma, AAST grade was associated with need for angiography (7%, 4%, 15%, 24%, 30%, p < 0.01) and percutaneous drainage (7%, 2%, 14%, 18%, 26%, p = 0.03) and had a marginal association with embolization (0%, 4%, 11%, 13%, 22%, p = 0.06). Laparotomy, ERCP, sphincterotomy, and stenting rates increased with AAST grade, but this was not statistically significant.

CONCLUSION

AAST grade is associated with the need for surgical hemostasis, angioembolization, and percutaneous drainage in both penetrating and blunt trauma. Operative, endoscopic, and percutaneous procedures are utilized more in penetrating trauma. Angioembolization was used more in blunt trauma. Mechanism should be considered when using AAST grade to guide management of liver injuries.

Depacked patients who underwent a shortened perihepatic packing for severe blunt liver trauma have a high survival rate: 20 years of experience in a level I trauma center

INTRODUCTION

Non-operative management is currently the preferred approach in blunt liver trauma, including high grade liver lesions. However, hemodynamic instability imposes the need for an emergency laparotomy, with a perihepatic packing (PHP) to control liver bleeding in most cases. Our retrospective study aimed to assess the outcomes of liver trauma patients who underwent a shortened PHP.

METHODS

All consecutive patients who underwent PHP for blunt liver trauma from 1998 to 2019 in our Level I trauma center were included in the study. Unstable patients with severe liver trauma were transferred to the operating room without any delay, and a collective decision was made to perform abbreviated laparotomy to pack the liver. Demographics, perioperative data, postoperative outcomes, and mortality were retrospectively collected, and survivors and deceased patients were compared with a paired t-test.

RESULTS

Fifty-nine patients of 206 patients admitted with severe liver injuries were treated with shortened PHP. Thirty-four (57.6%) patients died, including 26 (76.5%) within the first 24 h. Twelve (20.3%) patients had a selective hepatic embolization and eight (13.6%) had an extrahepatic embolization. Forty-eight patients had an extra abdominal associated injury. This was not a predictive factor of mortality. The removal of packing was performed in 24 patients within 72 h after laparotomy, with an 80% survival rate in these patients.

CONCLUSION

Shortened PHP is an effective strategy for controlling liver bleeding in severe hepatic trauma. The mortality rate of these patients is high, but after the removal of packing, the survival is good.

Minimally invasive management of traumatic biliary fistula in the setting of gastric bypass

The current management of persistent biliary fistula includes biliary stenting and peritoneal drainage. Endoscopic retrograde cholangiopancreatography (ERCP) is preferred over percutaneous techniques and surgery. However, in patients with modified gastric anatomy, ERCP may not be feasible without added morbidity. We describe a 37-year-old woman with traumatic biliary fistula, large volume choleperitonitis and abdominal compartment syndrome following a motor vehicle collision who was treated with laparoscopic drainage, lavage and biliary drain placement via percutaneous transhepatic cholangiography.

Accident-related hepatic trauma in a medical clinical center in eastern China: a cross-sectional study

Background

The treatment of hepatic injury can be complex. Medical clinical centers are often the first line hospitals for the diagnosis and treatment of hepatic trauma in China. The aim of the study is to summarize the experience in the diagnosis and treatment of hepatic trauma in one medical clinical center in China.

Methods

This retrospective study included patients with hepatic trauma admitted between January 2002 and December 2019 at the Xishan People’s Hospital of Wuxi. The outcomes were cure rate and death within 14 days post-discharge.

Results

Among the 318 patients with hepatic trauma, 146 patients underwent surgical treatment, and 172 received conservative treatment; three patients were transferred to other hospitals for further treatment; 283 patients were cured, and 35 died. Severe hepatic trauma occurred in 74 patients, with a mortality rate of 31.1% and accounting for 65.7% of total mortality. American Association for the Surgery of Trauma (AAST) grading ≥ III (OR = 3.51, 95%CI: 1.32–9.37, P = 0.012) and multiple organ injury (OR = 7.51, 95%CI: 2.51–22.46, P < 0.001) were independently associated with death. Among patients with AAST grading ≥ III, surgery was an independent protective factor for death (OR = 0.08, 95%CI: 0.01–0.45, P = 0.004). Among patients with ASST ≥ III and who underwent surgery, age (OR = 5.29, 95%CI: 1.37–20.33, P = 0.015) and peri-hepatic packing (PHP) (OR = 5.54, 95%CI: 1.43–21.487, P = 0.013) were independently associated with death.

Conclusions

AAST grading ≥ III and multiple organ injury were independently associated with death. Among patients with AAST grading ≥ III, surgery was an independent protective factor for death. Among patients with ASST ≥ III and who underwent surgery, age and PHP were independently associated with death.

The Role of Angioembolization in Hepatic Trauma

The liver is one of the most commonly injured solid organs in blunt abdominal trauma. Non-operative management is considered to be the gold standard for the care of most blunt liver injuries. Angioembolization has emerged as an important adjunct that is vital to the success of the non-operative management strategy for blunt hepatic injuries. This procedure, however, is fraught with some possible serious complications. The success, as well as rate of complications of this procedure, is determined by degree and type of injury, hepatic anatomy and physiology, and embolization strategy among other factors. In this review, we discuss these important considerations to help shed further light on the contribution and impact of angioembolization with regards to complex hepatic injuries.

Differences of liver CT perfusion of blunt trauma treated with therapeutic embolization and observation management

Massive hepatic necrosis after therapeutic embolization has been reported. We employed a 320-detector CT scanner to compare liver perfusion differences between blunt liver trauma patients treated with embolization and observation. This prospective study with informed consent was approved by institution review board. From January 2013 to December 2016, we enrolled 16 major liver trauma patients (6 women, 10 men; mean age 34.9 ± 12.8 years) who fulfilled inclusion criteria. Liver CT perfusion parameters were calculated by a two-input maximum slope model. Of 16 patients, 9 received embolization and 7 received observation. Among 9 patients of embolization group, their arterial perfusion (78.1 ± 69.3 versus 163.1 ± 134.3 mL/min/100 mL, p = 0.011) and portal venous perfusion (74.4 ± 53.0 versus 160.9 ± 140.8 mL/min/100 mL, p = 0.008) were significantly lower at traumatic parenchyma than at non-traumatic parenchyma. Among 7 patients of observation group, only portal venous perfusion was significantly lower at traumatic parenchyma than non-traumatic parenchyma (132.1 ± 127.1 vs. 231.1 ± 174.4 mL/min/100 mL, p = 0.018). The perfusion index between groups did not differ. None had massive hepatic necrosis. They were not different in age, injury severity score and injury grades. Therefore, reduction of both arterial and portal venous perfusion can occur when therapeutic embolization was performed in preexisting major liver trauma, but hepatic perfusion index may not be compromised.

Evolution of non-operative management of liver trauma

The management of complex liver injury has changed during the last 30 years. Operative management has evolved into a non-operative management (NOM) approach, with surgery reserved for those who present in extremis or become hemodynamically unstable despite resuscitation. This NOM approach has been associated with improved survival rates in severe liver injury and has been the mainstay of treatment for the last 20 years. Patients that fail NOM and require emergency surgery are associated with increased morbidity and mortality. Better patient selection may have an impact not only on the rate of failure of NOM, but the mortality rate associated with it. The aim of this article is to review the evidence that helped shape the evolution of liver injury management during the last 30 years.

Strategies in liver Trauma

The management of pediatric liver trauma has evolved significantly over the last few decades. While surgical intervention was frequently and mostly unsuccessfully practiced during the first half of the last century, the 1960s were witness to the birth and gradual acceptance of non-operative management of these injuries. In 2000, the American Pediatric Surgical Association (APSA) Trauma Committee disseminated evidenced-based guidelines to help guide the non-operative management of pediatric blunt solid organ injury. The guidelines significantly contributed to conformity in the management of these patients. Since then, a number of well-designed studies have questioned the strict categorization of these injuries and have led to a renewed reliance on clinical signs of the patient's hemodynamic status. In 2019, APSA introduced an updated set of guidelines emphasizing the use of physiologic status rather than radiologic grade as a driver of clinical decision making for these injuries. This review will focus on liver injuries, in particular blunt injury, as this mechanism is by far the most commonly seen in children. Procedures required when non-operative management fails will be detailed, including surgery, angioembolization, and less commonly employed interventions. Finally, the updated inpatient and post-discharge aspects of care will be reviewed, including hemoglobin monitoring, bedrest, length of hospital stay, and activity restriction.

Systematic Review of the Management of Retro-Hepatic Inferior Vena Cava Injuries

Background

Retro-hepatic inferior vena cava (RHIVC) injuries resulting from blunt or penetrating abdominal trauma are rare but devastating events that remain a considerable challenge to even the most experienced doctors, which continue to carry a considerable mortality.

Aim

To establish a better understanding of the management of RHIVC injuries and to identify any adjuncts or operative methods that were associated with an increased survival.

Methods

A systematic review of the MEDLINE database was conducted using Medical Search Headings and exploded keywords and phrases. Studies were screened and subjected to inclusion/exclusion criteria. Data were extracted in a methodical manner collecting population demographics, morbidity, mortality and operative intervention, where provided. Operative strategies were compared and discussed.

Results

An initial search identified 483 articles. Following duplicate removal and abstract screening, 85 full-text articles were assessed with 25 meeting the desired criteria and were, therefore, included in the systematic review. Key operative strategies and complications were identified and discussed.

Conclusion

The wide variety of operative interventions in the management of RHIVC liver injuries described attest to the increased efforts to improve outcomes. The overall improvement in mortality can be noted since the earlier descriptions reported mortality approaching 100% compared to the 52% reported in this review. An algorithm has been proposed based on these findings and our experiences for the management of RHIVC injuries.

Contemporary Management of Hepatic Trauma: What IRs Need to Know

Trauma remains one of the leading causes of death in the United States in patients younger than 45 years. Blunt trauma is most commonly a result of high-speed motor vehicular collisions or high-level fall. The liver and spleen are the most commonly injured organs, with the liver being the most commonly injured organ in adults and the spleen being the most affected in pediatric blunt trauma. Liver injuries incur a high level of morbidity and mortality mostly secondary to hemorrhage. Over the past 20 years, angiographic intervention has become a mainstay of treatment of hepatic trauma. As there is an increasing need for the interventional radiologists to embolize active hemorrhage in the setting of blunt and penetrating hepatic trauma, this article aims to review the current level of evidence and contemporary management of hepatic trauma from the perspective of interventional radiologists. Embolization techniques and associated outcome and complications are also reviewed.

Surgical treatment for severe liver injuries: a single-center experience

BACKGROUND

The liver is one of the most frequently injured organs in abdominal trauma. The advancements in diagnosis and interventional therapy shifted the management of liver trauma towards a non-operative management (NOM). Nevertheless, in severe liver injuries (LI), surgical treatment often involving liver resection (LR) and rarely liver transplantation (LT) remains the main option. The present paper analyses a single center experience in a referral HPB center on a series of patients with high-grade liver trauma.

METHODS

Forty-five patients with severe LI, that benefitted from NOM (6 pts), LRs (38 pts), and LT (1 pt) performed in our center between June 2000 and June 2019, were included in a combined prospective and retrospective study. The median age of the patients was 29 years (median 33, range 10-76), and the male/female ratio of 33/12. Almost all cases had blunt trauma, except 2 with stab wound (4.4%).

RESULTS

LIs classified according to the American Association for the Surgery of Trauma (AAST) system were 13.3% (grade III), 44.2% (grade IV), and 42.2% (grade V); none were grade I, II or VI. The rate of major LR was 56.4% (22 LRs). The median operative time was 200 minutes (mean 236; range 150-420). The median blood loss was 750 ml (mean 940; range 500-6500). Overall and major complication rates were 100% (45 pts) and 33.3% (15 pts), respectively. Overall mortality rate was 15.6% (7 pts).

CONCLUSIONS

Severe liver trauma, often involving complex liver resections, should be managed in a referral HPB center, thus obtaining the best results in terms of morbidity and mortality.

Traumatic bruising of the hepatoduodenal ligament can conceal a catastrophic injury to the hepatic artery

We present the case of a 22-year-old man transferred to the regional major trauma centre following a fall of ~15 m. He remained consistently haemodynamically stable for over 10 hours of observation until he deteriorated suddenly with major haemorrhagic shock requiring immediate trauma laparotomy. At laparotomy, 2 L of blood was drained from the abdomen but no source of active bleeding identified. 30 minutes after closure of the abdomen, 500 mL of fresh blood was noted in the drain so he was returned to the theatre where the bleeding source was found to be-after manual compression of a mildly bruised hepatoduodenal ligament-the proper hepatic artery (PHA). This case describes an unusual finding at relaparotomy and shows that even when there is no active bleeding from abdominal organs or classified vessels, it is possible to have isolated injury to PHA.

Biliovascuar complications: a price to pay for non-operative management of major liver trauma

BACKGROUND

With non-operative management of major liver trauma, there has been an increased incidence of biliovascular complications which are reported variably.

METHODS

Fifty-six patients with age of 29.79±11.40 years and M:F 8.3:1, with grade III or more liver trauma were evaluated after stabilization for the development of liver related complications. Patients with active contrast extravasation at admission were managed with immediate angioembolization. Patients with prolonged hospital stay underwent repeat CT prior to discharge. Radiological, endoscopic and surgical interventions were carried out as appropriate.

RESULTS

Ninety-eight percent had blunt abdominal injury. Mean injury severity score was 25.68±10.389. Four (7%) required damage control laparotomy. CECT showed grade III injuries in 52%, grade IV in 30.4%, and grade V in 18%. 11% had laceration extending to porta. Seventeen patients had 21 liver-related complications: 4 biliary, 12 vascular and 1 combined biliary and vascular. Liver related complications were- 3.5% in grade III, 52% in grade IV and 70% in grade V. One patient with active arterio-portal fistula required urgent angioembolization while other arterial pseudoaneurysms were detected 7.23±5.14 days after trauma. Angioembolization was successful in 83% patients. On univariate and multivariate analysis, PRBC requirement and injury grade were the predictors of bilivascular complications. Laceration extending to porta was a predictor for biliary complications and not vascular. Repeat CT picked up 13 complications in 10 patients.

CONCLUSIONS

Biliovascular complications are managed by multidisciplinary approach. Lacerations extending to porta and grade IV/V injuries have a higher chance of developing biliovascular complications and should be observed closely.

Influence of postoperative hepatic angiography on mortality after laparotomy in Grade IV/V hepatic injuries

BACKGROUND

Mortality rate for severe liver injuries remains high. As an adjunct to surgery, postoperative hepatic angiography (PHA) may have a positive impact on outcomes. This study sought to compare outcomes following surgical management of severe liver injuries with and without PHA using propensity score matching analysis.

METHODS

Data from the National Trauma Data Bank from 2007 to 2014 were analyzed. The study population consisted of patients older than 18 years, sustaining severe liver injuries (i.e., American Association for the Surgery of Trauma Organ Injury Scale (AAST-OIS) Grade IV or V) who underwent surgery. Patients were divided into two groups. The PHA group consisted of those undergoing surgery followed by PHA. In the surgery-only group, no angiography was performed. To determine the impact of PHA on outcomes, propensity score matching analysis (1:3) was used.

RESULTS

A total of 3,871 patients met inclusion criteria. Of those, 205 (5.3%) patients underwent PHA. Prior to matching, patients in the PHA group had higher severity, but overall in-hospital mortality was found to be similar between the two groups. After 1:3 propensity-score matching, 196 patients in the PHA group were matched with 588 in the surgery-only group with well-balanced baseline characteristics. The in-hospital mortality was significantly lower in the PHA group compared with the surgery-only group (24.5% vs. 35.9%; odds ratio, 0.58; 95% confidence interval, 0.40-0.84). However, hospital length of stay was longer (16.0 [7.0-29.8] vs. 11 [1.0-25.0] days, p = 0.001), and the incidence of deep and organ/space surgical site infection (3.6% vs. 1.2%, 8.2% vs. 3.5%, respectively) was higher in the PHA group.

CONCLUSION

The use of PHA was associated with decreased mortality rates. A multimodality approach using both surgical intervention followed by PHA appears to identify patients that may benefit from arterial embolization, leading to decreased mortality of severe liver injuries.

LEVEL OF EVIDENCE

Therapeutic study, level IV.

Stereological Comparison of Imbibed Fibrinogen Gauze versus Simple Gauze in External Packing of Grade IV Liver Injury in Rats

Objective

To evaluate the effect of imbibed fibrinogen gauze on survival, bleeding and healing in liver trauma.

Methods

This animal experimental study was conducted on 20 adult male Sprague-Dawley rats; with a mean weight of 300±50 gram; divided into two groups. Grade IV injury was induced to the subjects' liver. Then, the bleeding site was packed with simple gauze in the control group, and imbibed fibrinogen gauze in the experimental group. All animals were re-evaluated for liver hemostasis 48 hours after the initial injury. Bleeding in the intra peritoneal cavity was measured using Tuberculosis Syringe in the first and second operations. Subjects were followed-up for 14 days. Eventually, the rats were sacrificed and their livers were sent to a lab for stereological assessment. Statistical comparisons were performed via Mann-Whitney U-test using SPSS. P-Values less than 0.05 were considered to be statistically significant.

Results

Half of the rats in the control group died, while all the rats in the imbibed fibrinogen gauze group survived after two weeks (p= 0.032). Bleeding in the imbibed fibrinogen gauze was significantly less than control group, 48 hours' post-surgery (p<0.001). According to the stereological results, granulation tissue in the imbibed fibrinogen gauze group were more than the control group (P= 0.032). Also, fibrosis in the imbibed fibrinogen gauze group were more than the control group (P= 0.014).

Conclusion

Our study indicated that imbibed fibrinogen gauze can potentially control liver bleeding and improve survival through increasing granulation tissue and fibrosis in injured liver.

[Approach to liver, spleen and pancreatic injuries including damage control surgery of terrorist attacks]

BACKGROUND

Terrorist attacks have outreached to Europe with more and more attacks on civilians. Derived from war surgery experience and from lessons learned from major incidents, it seems mandatory for every surgeon to improve understanding of the special circumstances of trauma following a terrorist attack and its' management.

METHOD

A short literature review is followed by outlining the damage control surgery (DCS) principle for each organ system with practical comments from the perspective of a specialized hepatobiliary (HPB) surgery unit.

CONCLUSION

Every surgeon has to become familiar with the new entities of blast injuries and terrorist attack trauma. This concerns not only the medical treatment but also tailoring surgical treatment with a view to a lack of critical resources under these circumstances. For liver and pancreatic trauma, simple treatment strategies are a key to success.

General surgeon management of complex hepatopancreatobiliary trauma at a level I trauma center

BACKGROUND

The impact of general surgeons (GS) taking trauma call on patient outcomes has been debated. Complex hepatopancreatobiliary (HPB) injuries present a particular challenge and often require specialized care. We predicted no difference in the initial management or outcomes of complex HPB trauma between GS and trauma/critical care (TCC) specialists.

MATERIALS AND METHODS

A retrospective review of patients who underwent operative intervention for complex HPB trauma from 2008 to 2015 at an ACS-verified level I trauma center was performed. Chart review was used to obtain variables pertaining to demographics, clinical presentation, operative management, and outcomes. Patients were grouped according to whether their index operation was performed by a GS or TCC provider and compared.

RESULTS

180 patients met inclusion criteria. The GS (n = 43) and TCC (n = 137) cohorts had comparable patient demographics and clinical presentations. Most injuries were hepatic (73.3% GS versus 72.6% TCC) and TCC treated more pancreas injuries (15.3% versus GS 13.3%; P = 0.914). No significant differences were found in HPB-directed interventions at the initial operation (41.9% GS versus 56.2% TCC; P = 0.100), damage control laparotomy with temporary abdominal closure (69.8% versus 69.3%; P = 0.861), LOS, septic complications or 30-day mortality (13.9% versus 10.2%; P = 0.497). TCC were more likely to place an intraabdominal drain than GS (52.6% versus 34.9%; P = 0.043).

CONCLUSIONS

We found no significant differences between GS and TCC specialists in initial operative management or clinical outcomes of complex HPB trauma. The frequent and proper use of damage control laparotomy likely contribute to these findings.

Iatrogenic, blunt, and penetrating trauma to the biliary tract

Iatrogenic and traumatic bile leaks are uncommon. However, given the overall increase in number of hepatobiliary surgeries and the paradigm shift toward nonoperative management of patients with liver trauma, they have become more prevalent in recent years. Imaging is essential to establishing early diagnosis and guiding treatment as the clinical signs and symptoms of bile leaks are nonspecific, and a delay in recognition of bile leaks portends a high morbidity and mortality rate. Findings suspicious for a bile leak at computed tomography or ultrasonography include free or contained peri- or intrahepatic low density fluid in the setting of recent trauma or hepatobiliary surgery. Hepatobiliary scintigraphy and magnetic resonance cholangiopancreatography (MRCP) with hepatobiliary contrast agents can be used to detect active or contained bile leak. MRCP with hepatobiliary contrast agents has the unique ability to reveal the exact location of bile leak, which often governs whether endoscopic management or surgical management is warranted. Percutaneous transhepatic cholangiography and fluoroscopy via an indwelling catheter that is placed either percutaneously or surgically are useful modalities to guide percutaneous transhepatic biliary drain placement which can provide biliary drainage and/or diversion in the setting of traumatic biliary injury. Surgical treatment of a bile duct injury with Roux-en-Y hepaticojejunostomy is warranted if definitive treatment cannot be accomplished through percutaneous or endoscopic means.

Outcomes and complications of angioembolization for hepatic trauma: A systematic review of the literature

BACKGROUND

The liver is one of the most frequently injured abdominal organs. Hepatic hemorrhage is a complex and challenging complication following hepatic trauma. Significant shifts in the treatment of hepatic hemorrhage, including the increasing use of angioembolization, are believed to have improved patient outcomes. We aimed to describe the efficacy of angioembolization in the setting of acute hepatic arterial hemorrhage as well as the complications associated with this treatment modality.

METHODS

A systematic review of published literature (MEDLINE, SCOPUS, and Cochrane Library) describing hepatic angioembolization in the setting of trauma was performed. Articles that fulfilled the predetermined inclusion and exclusion criteria were included. We analyzed the efficacy rate of angioembolization in the setting of traumatic hepatic hemorrhage as well as the complications associated with hepatic angioembolization.

RESULTS

Four hundred fifty-nine articles were identified in the literature search. Of these, 10 retrospective studies and 1 prospective study met inclusion and exclusion criteria. Efficacy rate of angioembolization was 93%. The most frequently reported complications following hepatic angioembolization included hepatic necrosis (15%), abscess formation (7.5%), and bile leaks.

CONCLUSION

Although the outcomes of hepatic angioembolization were generally favorable with a high success rate, the treatment modality is not without associated morbidity. The most frequently associated major complication was hepatic necrosis. Rates of complications were affected by study heterogeneity and should be better defined in future studies.

LEVEL OF EVIDENCE

Systematic review, level III.

BioGlue for traumatic liver laceration

INTRODUCTION

Advances in diagnostic imaging and monitoring have led to a shift towards primary non-operative management for most blunt liver injuries. Hemostatic biologic agents are a potential adjunct in the treatment of bile leak, especially in patients requiring surgery for drainage of a biloma.

PRESENTATION OF CASE

We present a 31year old woman who presented to the hospital after a motor vehicle accident. She was found to have a Grade 4 liver injury causing hemoperitoneum. The patient was taken immediately for an exploratory laparotomy where the laceration was packed with an absorbable hemostatic mesh. On clinic follow-up one week after discharge, the patient was found to have a bile leak. An ERCP was performed and a stent was placed over the location of the leak. The patient underwent laparotomy the following day for evacuation of her bilomas. The liver laceration was identified and remained at the same depth. CryoLife Bioglue was used to seal the laceration.

DISCUSSION

Given the high volume biloma, it is unlikely this patient would have been successfully treated without laparotomy. As such, this was an ideal opportunity to utilize Bioglue as an adjunct to seal the liver laceration, and thus potentially the area of bile extravasation. The diversion of drainage using ERCP was likely to have reduced the volume of bile leak substantially, which would also have helped increase the efficacy of the procedure.

CONCLUSION

The case presented demonstrates a novel and safe option for the delayed repair of traumatic lacerations.

[Non-surgical management after blunt traumatic liver injuries: A review article]

Hepatic trauma is a common cause for admissions in the Emergency Room. Currently, non-surgical management is the standard treatment in haemodynamically stable patients with a success rate of around 85 to 98%. This haemodynamic stability is the most important factor in selecting the appropriate patient. Adjuncts in non-surgical management are angioembolisation, image-guided drainage and endoscopic retrograde cholangiopancreatography. Failure in non-surgical management is relatively rare but potentially fatal, and needs to be recognised and aggressively treated as early as possible. The main cause of failure in non-surgical management is persistent haemorrhage. The aim of this paper is to describe current evidence and guidelines that support non-surgical management of liver injuries in blunt trauma.

Complex hepatic injury involving a liver transplant recipient: A case report and review of literature

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Multidisciplinary approach is required to improve the morbidity and mortality of complex liver injuries AAST grades IV and V.

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Angioembolization is an essential adjunct in the management of complex liver injuries.

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Injuries to a transplanted liver warrant special consideration to the early involvement of a transplant surgeon.

The role of computed tomography in determining delayed intervention for gunshot wounds through the liver

INTRODUCTION

Gunshot wounds through the liver are highly lethal and are prone to delayed morbidity due to late complications.

METHODS

A retrospective study was performed to determine the incidence, morbidity, and need for late interventions in patients shot through the liver, and the role of post-injury CT in making those determinations.

RESULTS

83 patients were shot through the liver. Injury grades were: Grade V-12 (14 %), Grade IV-41 (49 %), Grade III-12 (14 %), Grade II-8 (10 %), Grade I-1 (1 %), and nine were ungraded. Ten (12 %) died in the ED, three (4 %) died in the OR, and two (2 %) died postoperatively. Of the 68 survivors, 52 (76 %) had follow-up CT scans performed a median of 7 days (95 % CI 2-13 days) after injury. Seventeen (33 %) had 25 complications related to the bullet tract: 12 (48 %) abscesses, 6 (24 %) infected hematomas, 3 (12 %) bilomas, 3 (12 %) unclassified fluid collections, and 1 (4 %) hepatic necrosis. Treatment included CT-guided drainage in 15 (60 %), ultrasound-guided drainage in 3 (12 %), surgical drainage and debridement in 2 (8 %), and observation in 5 (20 %). Overall morbidity rate including hepatic and non-hepatic complications was 74 % (50/68). Patients having their CT scan-determined intervention (for all complications) within 7 days of injury (n = 24), compared to those having their CT scan-determined intervention on day 8 or later (n = 28), had a significantly decreased rate of overall complications and morbidity (p = 0.03). This difference was due to early detection and intervention for abscesses, anastomotic breakdown, and missed injuries. Those having a CT scan within 7 days of injury also had a significantly reduced length of stay compared to those scanned on day 8 or later (median 14 days, 95 % CI 4-24 days versus 18 days, 95 % CI 6-30 days, p = 0.05).

CONCLUSIONS

Gunshot wounds to the liver have a high morbidity and mortality rate. Survivors should have a follow-up CT scan performed within 7 days to allow detection and intervention for complications, as this dramatically decreases the overall morbidity rate and length of stay.

Hepatic trauma: a 21-year experience

OBJECTIVE

To evaluate the epidemiological aspects, behavior, morbidity and treatment outcomes for liver trauma.

METHODS

We conducted a retrospective study of patients over 13 years of age admitted to a university hospital from 1990 to 2010, submitted to surgery or nonoperative management (NOM).

RESULTS

748 patients were admitted with liver trauma. The most common mechanism of injury was penetrating trauma (461 cases, 61.6%), blunt trauma occurring in 287 patients (38.4%). According to the degree of liver injury (AAST-OIS) in blunt trauma we predominantly observed Grades I and II and in penetrating trauma, Grade III. NOM was performed in 25.7% of patients with blunt injury. As for surgical procedures, suturing was performed more frequently (41.2%). The liver-related morbidity was 16.7%. The survival rate for patients with liver trauma was 73.5% for blunt and 84.2% for penetrating trauma. Mortality in complex trauma was 45.9%.

CONCLUSION

trauma remains more common in younger populations and in males. There was a reduction of penetrating liver trauma. NOM proved safe and effective, and often has been used to treat patients with penetrating liver trauma. Morbidity was high and mortality was higher in victims of blunt trauma and complex liver injuries.

[Damage control surgery: an update]

The damage control surgery is a widely accepted concept today among abdominal trauma specialists when it comes to the severely traumatized. In these patients, the death is due, in most cases, to the installation of the lethal triad (hypothermia, coagulopathy and acidosis) and not the inability to repair the serious initial damage. In this review, the authors address the lethal triad in its three phases and emphasize the measures taken to prevent them, as well as discussing the indication and employment of damage control surgery in its various stages. Restoring the physiological status of the patient in the ICU, so that he/she can be submitted to final operation and closure of the abdominal cavity, another challenge in severe trauma patients, is also discussed.

Surgical management and outcome of blunt major liver injuries: experience of damage control laparotomy with perihepatic packing in one trauma centre

INTRODUCTION

This retrospective study aimed to assess the clinical experience and outcome of damage control laparotomy with perihepatic packing in the management of blunt major liver injuries.

MATERIALS AND METHODS

From January 1998 to December 2006, 58 patients of blunt major liver injury, American Association for the Surgery of Trauma-Organ Injury Scale (AAST-OIS) equal or greater than III, were operated with perihepatic packing at our institute. Demographic data, intra-operative findings, operative procedures, adjunctive managements and outcome were reviewed. To determine whether there was statistical difference between the survivor and non-survivor groups, data were compared by using Mann-Whitney U test for continuous variables, either Pearson's chi-square test or with Yates continuity correction for contingency tables, and results were considered statistically significant if p<0.05.

RESULTS

Of the 58 patients, 20 (35%) were classified as AAST-OIS grade III, 24 (41%) as grade IV, and 14 (24%) as grade V. At laparotomy, depending on the severity of injuries, all 58 patients underwent various liver-related procedures and perihepatic packing. The more frequent liver-related procedures included debridement hepatectomy (n=21), hepatorrhaphy (n=19), selective hepatic artery ligation (n=11) and 7 patients required post-laparotomy hepatic transarterial embolization. Of the 58 patients, 28 survived and 30 died with a 52% mortality rate. Of the 30 deaths, uncontrolled liver bleeding in 24-h caused 25 deaths and delayed sepsis caused residual 5 deaths. The mortality rate versus OIS was grade III: 30% (6/20), grade IV: 54% (13/24), and grade V: 79% (11/14), respectively. On univariate analysis, the significant predictors of mortality were OIS grade (p=0.019), prolonged initial prothrombin time (PT) (p=0.004), active partial thromboplastin time (APTT) (p<0.0001) and decreased platelet count (p=0.005).

CONCLUSIONS

The mortality rate of surgical blunt major liver injuries remains high even with perihepatic packing. Since prolonged initial PT, APTT and decreased platelet count were associated with high risk of mortality, we advocate combination of damage control resuscitation with damage control laparotomy in these major liver injuries.

Management of biliary complications following damage control surgery for liver trauma

BACKGROUND

The liver is the most frequently injured solid intra-abdominal organ. The major cause of early death following severe liver trauma is exsanguination. Although perihepatic packing improves survival in severe liver trauma, this leaves parenchymal damage untreated, often resulting in post-traumatic biliary leakage and a subsequent rise in morbidity. The aim of this study was to analyze the incidence and treatment of biliary leakage following the operative management of liver trauma.

METHODS

Patients presenting between 2000 and 2009 to Erasmus University Medical Centre with traumatic liver injury were identified. Data from 125 patients were collected and analyzed. Sixty-eight (54 %) patients required operation. All consecutive patients with post-operative biliary complications were analyzed. Post-operative biliary complications were defined as biloma, biliary fistula, and bilhemia.

RESULTS

Ten (15 %) patients were diagnosed with post-operative biliary leakage following liver injury. Three patients with a biloma were treated with percutaneous drainage, without further intervention. Seven patients with significant biliary leakage were managed by endoscopic stenting of the common bile duct to decompress the internal biliary pressure. One patient had a relaparotomy and right hemihepatectomy to control biliary leakage and injury of the right hepatic duct.

CONCLUSION

Biliary complications continue to occur frequently following damage control surgery for liver trauma. The majority of biliary complications can be managed without an operation. Endoscopic retrograde cholangiopancreatography (ERCP) and internal stenting represent a safe strategy to manage post-operative biliary leakage and bilhemia in patients following liver trauma. Minor biliary leakage should be managed by percutaneous drainage alone.

Liver injury following blunt abdominal trauma: a new mechanism-driven classification

Purposes

The current classifications for blunt liver trauma focus only on the extent of liver injury. However, these scores are independent from the localization of liver injury and mechanism of trauma.

Methods

The type of liver injury after blunt abdominal trauma was newly classified as type A when it was along the falciform ligament with involvement of segments IVa/b, III, or II, and type B when there was involvement of segments V–VIII. With the use of a prospectively established database, the clinical, perioperative, and outcome data were analyzed regarding the trauma mechanism, as well as the radiological and intraoperative findings.

Results

In 64 patients, the type of liver injury following blunt abdominal trauma was clearly linked with the mechanism of trauma: type A injuries (n = 28) were associated with a frontal trauma, whereas type B injuries (n = 36) were found after complex trauma mechanisms. The demographic data, mortality, ICU stay, and hospital stay showed no significant differences between the two groups. Interestingly, all patients with type A ruptures required immediate surgical intervention, whereas six patients (16.7 %) with type B ruptures could be managed conservatively.

Conclusions

This new classification for blunt traumatic hepatic injury is based on the localization of parenchymal disruption and correlates with the mechanism of trauma. The type of liver injury correlated with the necessity for surgical therapy.

Internal vacuum-assisted closure device in the swine model of severe liver injury

OBJECTIVES

The authors present a novel approach to nonresectional therapy in major hepatic trauma utilizing intraabdominal perihepatic vacuum assisted closure (VAC) therapy in the porcine model of Grade V liver injury.

METHODS

A Grade V injury was created in the right lobe of the liver in a healthy pig. A Pringle maneuver was applied (4.5 minutes total clamp time) and a vacuum assisted closure device was placed over the injured lobe and connected to suction. The device consisted of a perforated plastic bag placed over the liver, followed by a 15 cm by 15cm VAC sponge covered with a nonperforated plastic bag. The abdomen was closed temporarily. Blood loss, cardiopulmonary parameters and bladder pressures were measured over a one-hour period. The device was then removed and the animal was euthanized.

RESULTS

Feasibility of device placement was demonstrated by maintenance of adequate vacuum suction pressures and seal. VAC placement presented no major technical challenges. Successful control of ongoing liver hemorrhage was achieved with the VAC. Total blood loss was 625 ml (20ml/kg). This corresponds to class II hemorrhagic shock in humans and compares favorably to previously reported estimated blood losses with similar grade liver injuries in the swine model. No post-injury cardiopulmonary compromise or elevated abdominal compartment pressures were encountered, while hepatic parenchymal perfusion was maintained.

CONCLUSION

These data demonstrate the feasibility and utility of a perihepatic negative pressure device for the treatment of hemorrhage from severe liver injury in the porcine model.

Non-operative management of liver trauma

The liver is one of the commonest intra-abdominal organs injured worldwide in blunt and penetrating trauma and its management has evolved significantly in the last 30 years. Mandatory laparotomy has been replaced by an acceptance that for most blunt hepatic trauma, a selective non-operative approach is safe and effective with a failure rate ie the need to proceed to delayed laparotomy of approximately 10%. There is a markedly lower rate of complications in those that are managed non-operatively. Adjuncts to this conservative regimen such as angioembolisation and delayed laparoscopy to treat biliary peritonitis increase the chances of avoiding laparotomy. This belief in non-operative management has also been transferred to some degree to penetrating liver trauma, where there is a gradual accumulation of evidence to support this non-operative approach in a carefully selected group of patients. This article examines the evidence supporting the selective non-operative management of both blunt and penetrating liver trauma and describes the outcomes and complications.

Predictive factors of morbidity and mortality in grade IV and V liver trauma undergoing perihepatic packing: single institution 14 years experience at European trauma centre

PURPOSE

Major liver trauma in polytraumatic patients accounts for significant morbidity and mortality. We aimed to assess prognostic factors for morbidity and mortality in patients with severe liver trauma undergoing perihepatic packing.

METHODS

Prospectively collected records of 293 consecutive polytrauma patients with liver injury admitted at a level I trauma centre between 1996 and 2008 were reviewed. 39 patients with grade IV-V AAST liver injury and treated with peri-hepatic packing were identified and included for analysis. Univariate and multivariate analyses were performed to assess prognostic factors for morbidity and mortality.

RESULTS

Mean age of patients was 41 years. 34 patients were haemodynamically unstable at initial presentation. Ten of 39 patients were treated with angiographic embolization in addition to perihepatic packing. The overall mortality rate was 51.3%. Liver-related death occurred in 23.1%. Overall and liver-related morbidity rates were 90% and 28%, respectively. Glasgow Coma Scale (GCS), respiratory rate, packed red blood cells (PRBC) transfusion, pH and Base Excess (BE), Revised Trauma Score (RTS) and Trauma Injury Severity Score (TRISS), need for angiographic embolization as well as early OR and ICU admission were associated with significant decrease of early mortality.

CONCLUSIONS

Revised Trauma Score, haemodynamic instability, blood pH and BE are important prognostic factors influencing morbidity and mortality in polytrauma patients with grade IV/V liver injury. Furthermore, fast and effective surgical damage control procedure with perihepatic packing, followed by early ICU admission is associated with lower complication rate and shorter ICU stays in this patient population.

Nonoperative management for patients with grade IV blunt hepatic trauma

Introduction

The treatment of complex liver injuries remains a challenge. Nonoperative treatment for such injuries is increasingly being adopted as the initial management strategy. We reviewed our experience, at a University teaching hospital, in the nonoperative management of grade IV liver injuries with the intent to evaluate failure rates; need for angioembolization and blood transfusions; and in-hospital mortality and complications.

Methods

This is a retrospective analysis conducted at a single large trauma centre in Brazil. All consecutive, hemodynamically stable, blunt trauma patients with grade IV hepatic injury, between 1996 and 2011, were analyzed. Demographics and baseline characteristics were recorded. Failure of nonoperative management was defined by the need for surgical intervention. Need for angioembolization and transfusions, in-hospital death, and complications were also assessed

Results

Eighteen patients with grade IV hepatic injury treated nonoperatively during the study period were included. The nonoperative treatment failed in only one patient (5.5%) who had refractory abdominal pain. However, no missed injuries and/or worsening of bleeding were observed during the operation. None of the patients died nor need angioembolization. No complications directly related to the liver were observed. Unrelated complications to the liver occurred in three patients (16.7%); one patient developed a tracheal stenosis (secondary to tracheal intubation); one had pleural effusion; and one developed an abscess in the pleural cavity. The hospital length of stay was on average 11.56 days.

Conclusions

In our experience, nonoperative management of grade IV liver injury for stable blunt trauma patients is associated with high success rates without significant complications.

Non-operative management of hepatic trauma and the interventional radiology: an update review

The growing trend to manage hepatic injuries nonoperatively has been increasing demand for advanced endovascular interventions. This brings up the necessity for general and trauma surgeons to update their knowledge in such matter. Effective treatment mandates a multispecialty team effort that is usually led by the trauma surgeon and includes vascular surgery, orthopedics, and, increasingly, interventional radiology. The focus on hemorrhage control and the angiographer's unique access to vascular structures gives interventional radiology (IR) an important and increasingly recognized role in the treatment of patients with hemodynamic instability. Our aim is to review the basic concepts of IR primarily in hepatic trauma and secondarily in some other special situations. A liver vascular anatomy review is also needed for better understanding the roles of IR. As a final point we propose a guideline for the operative/nonoperative management of traumatic hepatic injuries. The benefit of multidisciplinary approach (TAE) appears to be a powerful weapon in the medical arsenal against the high mortality of injured trauma liver patients.

Tomographic findings are not always predictive of failed nonoperative management in blunt hepatic injury

BACKGROUND

Nonoperative management (NOM) has become the standard treatment of blunt hepatic injury (BHI) for stable patients. Contrast extravasation (CE) on computed tomography (CT) scan had been reported as a sign that is associated with NOM failure. The goal of this study was to further investigate the risk factors of NOM failure in patients with CE on CT scan.

METHODS

From January 2005 to September 2009, patients with CE noted on a CT scan as a result of BHI were studied retrospectively. Physiological parameters, severity of injury, amount of transfusion, type of contrast extravasation, as well as treatment outcome were compared between patients with NOM failure and NOM success.

RESULTS

A total of 130 patients were enrolled. Injury severity scores, amount of blood transfusion before hemostatic procedure, and grade of liver injury were significantly higher in NOM failure than in NOM success patients. There was no statistical difference in the NOM success rate between patients with contrast leakage into the peritoneum and those with contrast confined in the hepatic parenchyma.

CONCLUSIONS

Higher injury severity score, more blood transfusion, and higher grade of liver injury are factors that correlate with NOM failure in patients with BHI. Contrast leakage into the peritoneum is not always a definite sign of NOM failure in BHI. Early and aggressive angioembolization is an effective adjunct of NOM in BHI patients, even with contrast leakage into peritoneum.

Hepatic and splenic trauma

The spleen and liver are two organs commonly injured in various forms of abdominal trauma. Their relative size, relatively fixed positions, and abundant vascular supply make them prone both to injury and potential sources of catastrophic haemorrhage. With the evolution of computed tomography (CT), there has been a paradigm shift in the management of such injuries from operative to non-operative means. Advances in imaging techniques have also enabled clinicians to observe such patients for development of complications, and when appropriate, utilise the repertoire of interventional radiology techniques available. This review aims to summarise the epidemiology of splenic and hepatic trauma, the mechanisms of trauma and the classifications used in describing these injuries. The role of commonly used imaging modalities, namely ultrasound and CT, both in the acute setting and in observation of these patients for delayed complications is described, and finally a brief description of the current management strategies of such injuries is given.

Resuscitation of uncontrolled traumatic hemorrhage induced by severe liver injury: the use of human adrenomedullin and adrenomedullin binding protein-1

BACKGROUND

The liver is a major organ that is susceptible to injury after blunt or penetrating trauma to the abdomen. No specific nonoperative treatment exists for traumatic hepatic injury (THI). Adrenomedullin (AM), a vasoactive peptide, combined with its binding protein, AM protein (AMBP-1), is beneficial in various disease conditions. In this study, we propose to analyze whether human AM combined with human AMBP-1 provides benefit in a model of THI in the rat.

METHODS

Male adult rats were subjected to trauma hemorrhage by resection of ∼50% of total liver tissues and allowed bleeding for 15 minutes. Immediately thereafter, human AM (48 μg/kg birth weight) plus human AMBP-1 (160 μg/kg birth weight) were given intravenously over 30 minutes in 1-mL normal saline. After 4 hours, the rats were killed, blood was collected, and tissue injury indicators were assessed. A 10-day survival study was also conducted.

RESULTS

At 4 hours after THI, plasma AMBP-1 levels were markedly decreased. Plasma levels of liver injury indicators (i.e., aspartate aminotransferase, alanine aminotransferase, and lactate dehydrogenase) were significantly increased after THI. Similarly, lactate, creatinine, and tumor necrosis factor-α levels were significantly increased after THI. Administration of human AM/AMBP-1 after THI produced significant decreases of 64%, 23%, and 19% of plasma aspartate aminotransferase, alanine aminotransferase, and lactate dehydrogenase levels, respectively. Similarly, plasma levels of lactate, creatinine, and tumor necrosis factor-α were also decreased by 42%, 28%, and 46% after human AM/AMBP-1 treatment, respectively. In a 10-day survival study, although vehicle treatment produced 41% survival, human AM/AMBP-1 treatment improved the survival rate to 81%.

CONCLUSIONS

Administration of human AM/AMBP-1 significantly attenuated tissue injury and inflammation and improved survival after THI. Thus, human AM/AMBP-1 can be developed as a novel treatment for victims with uncontrolled traumatic hemorrhage.

Management of liver trauma in adults

The liver is one of the most commonly injured organs in abdominal trauma. Recent advancements in imaging studies and enhanced critical care monitoring strategies have shifted the paradigm for the management of liver injuries. Nonoperative management of both low- and high-grade injuries can be successful in hemodynamically stable patients. Direct suture ligation of bleeding parenchymal vessels, total vascular isolation with repair of venous injuries, and the advent of damage control surgery have all improved outcomes in the hemodynamically unstable patient population. Anatomical resection of the liver and use of atriocaval shunt are rarely indicated.

Treatment of major hepatic necrosis: lobectomy versus serial debridement

BACKGROUND

Major hepatic necrosis (MHN) is a common complication after angioembolization (AE) for severe liver injuries. We compared the outcomes of two treatment modalities.

METHODS

Patients with MHN were retrospectively reviewed from January 2002 to October 2007. Demographics, Injury Severity Scale score, length of stay, admission Glasgow Coma Scale Score, mortality, transfusion requirements, intra-abdominal complications, admission physiologic variables, and the number and type of abdominal procedures (operative or nonoperative) were collected. These patients were then divided into two groups-those treated with hepatic lobectomy (HL) and those treated with multiple procedures including serial operative debridements and/or percutaneous drainage (IR/OR).

RESULTS

Thirty patients (41%) with MHN were identified from 71 patients who had AE. Sixteen patients with MHN underwent HL and 14 patients underwent multiple IR/OR procedures. The two groups were similar at baseline, except that the HL group had a higher Injury Severity Scale score. Outcomes between the two groups were similar. There was a significantly higher complication rate and increased number of procedures in the IR/OR group. There were no deaths in patients who had early HL (<5 days). There was one death in the later lobectomy group.

CONCLUSION

MHN is a common complication after AE. This complication can be safely managed with a series of operative debridements in conjunction with interventional procedures or with HL. Lobectomy is associated with a lower complication rate and a fewer number of procedures. Early lobectomy may be better than a delayed procedure.