The contemporary management of penetrating splenic injury

Abdominal versus pelvic gunshot injuries in terms of postoperative outcomes: A cohort representing the experience of 406 cases in seven years

Objectives

Gunshot injuries have become a significant problem globally. This study aimed to assess the differences between abdominal versus pelvic gunshot injuries in terms of postoperative outcomes to determine which type of injury is more lethal.

Material and Methods

This was a cohort study carried out to compare patients who had abdominal versus pelvic gunshot injuries, to analyse the differences in the impact of the anatomical site of injury on morbidity, mortality, and disabilities in all patients who had been admitted to the hospital due to torso gunshot injuries from February 2011 to December 2018.

Results

During the study period, 406 patients suffered from torso gunshot injuries. 391 were males and 15 were females; 343 (84.4%) patients had abdominal gunshot wounds, which were considered the first group, while in the second group, there were 63 (15.6%) patients who had pelvic gunshot wounds In the first group, 328 (95.6%) patients required urgent explorative laparotomy, complications were observed in 83 (24.2%) patients, while re-operations were reported in 51 (14.9%) patients and 11 (3.2%) patients had permanent functional disabilities, and 46 (13.4%) patients passed away. In the second group, all patients were treated with urgent explorative laparotomy, 17 (27%) patients suffered from complications, re-operation occurred in 13 (20.6%) patients, permeant functional disability occurred in 17 (27%) patients, and mortality was seen in 16 (25.4%) patients.

Conclusion

Our clinical experience has shown that mortality rates and long-term disability occur at a higher rate in pelvic gunshot injuries therefore early senior surgeon input is mandatory for the potential poor outcome to be minimized.

Pseudoaneurysm after High-Grade Penetrating Solid Organ Injury and Utility of Delayed CT Angiography

BACKGROUND

Leaving an injured solid organ in situ allows preservation of structure function but invites complications from the damaged parenchyma, including pseudoaneurysms (PSAs). Empiric PSA screening after solid organ injury is not yet established, particularly following penetrating trauma. The study objective was definition of delayed CT angiography (dCTA) yield in triggering intervention for PSA after penetrating solid organ injury.

METHODS

Penetrating trauma patients at our American College of Surgeons-verified level 1 center with American Association for the Surgery of Trauma grade ≥3 abdominal solid organ injury (liver, spleen, kidney) were retrospectively screened (January 2017 to October 2021). Exclusions were age <18 y, transfers, death within <48 h, and nephrectomy/splenectomy within <4 h. Primary outcome was intervention triggered by dCTA. Statistical testing with ANOVA/chi-square compared outcomes between screened vs unscreened patients.

RESULTS

A total of 136 penetrating trauma patients met study criteria: 57 patients (42%) screened for PSA with dCTA and 79 (58%) unscreened. Liver injuries were most common (n = 41, 64% vs n = 55, 66%), followed by kidney (n = 21, 33% vs n = 23, 27%) and spleen (n = 2, 3% vs n = 6, 7%) (p = 0.48). Median American Association for the Surgery of Trauma grade of solid organ injury was 3 (3 to 4) across groups (p = 0.75). dCTA diagnosed 10 PSAs (18%) at a median of hospital day 5 (3 to 9). Among screened patients, dCTA triggered intervention in 17% of liver patients, 29% of kidney patients, and 0% of spleen-injured patients, for an overall yield of 23%.

CONCLUSIONS

Half of eligible penetrating high-grade solid organ injuries were screened for PSA with dCTA. dCTA identified a significant number of PSAs and triggered intervention in 23% of screened patients. dCTA did not diagnose any PSAs after splenic injury, although sample size hinders interpretation. To avoid missing PSAs and incurring their risk of rupture, universal screening of high-grade penetrating solid organ injuries may be prudent.

Damage control surgery for splenic trauma: "preserve an organ - preserve a life"

The spleen is one of the most commonly injured solid organs of the abdominal cavity and an early diagnosis can reduce the associated mortality. Over the past couple of decades, management of splenic injuries has evolved to a prefered non-operative approach even in severely injured cases. However, the optimal surgical management of splenic trauma in severely injured patients remains controversial. This article aims to present an algorithm for the management of splenic trauma in severely injured patients, that includes basic principles of damage control surgery and is based on the experience obtained by the Trauma and Emergency Surgery Group (CTE) of Cali, Colombia. The choice between a conservative or a surgical approach depends on the hemodynamic status of the patient. In hemodynamically stable patients, a computed tomography angiogram should be performed to determine if non-operative management is feasible and if angioembolization is required. While hemodynamically unstable patients should be transferred immediately to the operating room for damage control surgery, which includes splenic packing and placement of a negative pressure dressing, followed by angiography with embolization of any ongoing arterial bleeding. It is our recommendation that both damage control principles and emerging endovascular technologies should be applied to achieve splenic salvage when possible. However, if surgical bleeding persists a splenectomy may be required as a definitive lifesaving maneuver.

Laparoscopic splenectomy as a definitive management option for high-grade traumatic splenic injury when non operative management is not feasible or failed: a 5-year experience from a level one trauma center with minimally invasive surgery expertise

Technique, indications and outcomes of laparoscopic splenectomy in stable trauma patients have not been well described yet. All hemodynamically non-compromised abdominal trauma patients who underwent splenectomy from 1/2013 to 12/2017 at our Level 1 trauma center were included. Demographic and clinical data were collected and analysed with per-protocol and an intention-to-treat comparison between open vs laparoscopic groups. 49 splenectomies were performed (16 laparoscopic, 33 open). Among the laparoscopic group, 81% were successfully completed laparoscopically. Laparoscopy was associated with a higher incidence of concomitant surgical procedures (p 0.016), longer operative times, but a significantly faster return of bowel function and oral diet without reoperations. No significant differences were demonstrated in morbidity, mortality, length of stay, or long-term complications, although laparoscopic had lower surgical site infection (0 vs 21%).The isolated splenic injury sub-analysis included 25 splenectomies,76% (19) open and 24% (6) laparoscopic and confirmed reduction in post-operative morbidity (40 vs 57%), blood transfusion (0 vs 48%), ICU admission (20 vs 57%) and overall LOS (7 vs 9 days) in the laparoscopic group. Laparoscopic splenectomy is a safe and effective technique for hemodynamically stable patients with splenic trauma and may represent an advantageous alternative to open splenectomy in terms of post-operative recovery and morbidity.

Selective Nonoperative Management of Abdominal Shotgun Wounds

BACKGROUND

Selective nonoperative management (SNOM) of abdominal gunshot wounds (GSWs) has not been specifically examined after shotgun injuries. Because of the unpredictable nature of shotgun pellets, it is unclear if SNOM after shotgun wounds is safe. The study objective was to examine outcomes after SNOM for shotgun wounds to the abdomen.

METHODS

Patients with isolated abdominal shotgun wounds were identified from the National Trauma Data Bank (2007-2017). Transfers, arrival without signs of life, death in the emergency department, severe (Abbreviated Injury Scale ≥3) extra-abdominal injuries, abdominal Abbreviated Injury Scale = 6, and missing data were exclusion criteria. Patients with abdominal handgun wounds (GSWs) were used for comparison. Study groups of shotgun-injured patients were defined by management strategy: operative management (OM) (exploratory laparotomy ≤4h) versus SNOM (no exploratory laparotomy ≤4h). Outcomes were compared by mechanism of injury (shotgun versus GSW) and management strategy (OM versus SNOM) using univariate and multivariate analyses.

RESULTS

After exclusions, 1425 patients injured by abdominal shotgun wounds were included. Shotgun-injured patients underwent SNOM more frequently than GSW patients (42% versus 34%, P < 0.001). On multivariate analysis, injury by shotgun was independently associated with SNOM (OR 1.443, P = 0.040). Shotgun injuries were significantly more likely to fail SNOM (OR 2.401, P = 0.018). Failure of SNOM occurred earlier among shotgun-than GSW-injured patients (15 versus 24h, P = 0.011). SNOM after shotgun injury was associated with lower mortality than OM, even when patients failed SNOM (P < 0.001). Complications were uniformly higher after OM than SNOM, even when SNOM failed (P < 0.05).

CONCLUSIONS

SNOM was utilized more commonly after shotgun wounds than GSWs. However, SNOM was more likely to fail after shotgun injury and tended to occur earlier after admission. SNOM after shotgun injury was associated with improved mortality and decreased complication rates when compared with OM, even when patients failed SNOM. SNOM appears to be a safe and beneficial management strategy after shotgun wounds to the abdomen.

A Multiscale Deep Learning Method for Quantitative Visualization of Traumatic Hemoperitoneum at CT: Assessment of Feasibility and Comparison with Subjective Categorical Estimation

PURPOSE

To evaluate the feasibility of a multiscale deep learning algorithm for quantitative visualization and measurement of traumatic hemoperitoneum and to compare diagnostic performance for relevant outcomes with categorical estimation.

MATERIALS AND METHODS

This retrospective, single-institution study included 130 patients (mean age, 38 years; interquartile range, 25-50 years; 79 men) with traumatic hemoperitoneum who underwent CT of the abdomen and pelvis at trauma admission between January 2016 and April 2019. Labeled cases were separated into five combinations of training (80%) and test (20%) sets, and fivefold cross-validation was performed. Dice similarity coefficients (DSCs) were compared with those from a three-dimensional (3D) U-Net and a coarse-to-fine deep learning method. Areas under the receiver operating characteristic curve (AUCs) for a composite outcome, including hemostatic intervention, transfusion, and in-hospital mortality, were compared with consensus categorical assessment by two radiologists. An optimal cutoff was derived by using a radial basis function-based support vector machine.

RESULTS

Mean DSC for the multiscale algorithm was 0.61 ± 0.15 (standard deviation) compared with 0.32 ± 0.16 for the 3D U-Net method and 0.52 ± 0.17 for the coarse-to-fine method (P < .0001). Correlation and agreement between automated and manual volumes were excellent (Pearson r = 0.97, intraclass correlation coefficient = 0.93). The algorithm produced intuitive and explainable visual results. AUCs for automated volume measurement and categorical estimation were 0.86 and 0.77, respectively (P = .004). An optimal cutoff of 278.9 mL yielded accuracy of 84%, sensitivity of 82%, specificity of 93%, positive predictive value of 86%, and negative predictive value of 83%.

CONCLUSION

A multiscale deep learning method for traumatic hemoperitoneum quantitative visualization had improved diagnostic performance for predicting hemorrhage-control interventions and mortality compared with subjective volume estimation. Supplemental material is available for this article. © RSNA, 2020.

Selective nonoperative management of renal gunshot wounds

BACKGROUND

Selective nonoperative management (SNOM) of blunt kidney injuries has been the standard of care for decades. However, the role of SNOM after renal gunshot wounds (GSWs) remains unclear. The purpose of this study was to assess the safety and outcomes of SNOM of renal GSWs at a national level.

METHODS

The National Trauma Data Bank was queried for patients who sustained a GSW to the kidney (January 2007 to December 2014). Patients with emergency department death, transfer, nonsurvivable (Abbreviated Injury Scale score = 6) injuries, absent vitals on arrival, associated hollow viscus or major abdominal vascular injury, or missing procedure/discharge data were excluded. Study groups were defined according to management strategy, with operative management (OM) defined as laparotomy 4 hours or less from admission and SNOM defined by the lack of laparotomy 4 hours or less from admission. Demographics, injury data, and outcomes (mortality, complications, need for nephrectomy, failure of SNOM [defined as laparotomy 5-72 hours after admission], and hospital length of stay [LOS]) were collected. Logistic regression compared outcomes between SNOM and OM.

RESULTS

Over the study period, 1,329 patients met inclusion and exclusion criteria. Of these, 459 (34.5%) underwent SNOM (38.6% of American Association for the Surgery of Trauma kidney injury grades I-II, 39.4% of grade III, 24.0% of grade IV, and 5.2% of grade V). SNOM was associated with significantly shorter hospital LOS (6 days vs. 9 days, p < 0.001). Failure of SNOM occurred in 10.2%. Logistic regression showed no association between SNOM and mortality (odds ratio [OR], 0.614, p = 0.244). However, SNOM was independently associated with fewer complications (OR, 0.711; p = 0.008) and a reduction in need for nephrectomy (OR, 0.056; p < 0.001).

CONCLUSION

SNOM of GSWs to the kidney has become a common practice in the United States. It is safe and has a high success rate, even in severe kidney injuries. It decreases hospital LOS and is independently associated with fewer complications and reduced need for nephrectomy.

LEVEL OF EVIDENCE

Therapeutic/Care Management, level IV.

Trends in the Nature and Management of Serious Abdominal Trauma

BACKGROUND

There have been recommendations for increased non-operative management (NOM) of abdominal trauma in adults. To assess the impact of this trend and changes in the epidemiology of trauma, we examined the management of serious abdominal injuries and mortality, in Victorian major trauma patients 16 years or older, between 2007 and 2016.

METHODS

Using data from the population-based Victorian Trauma Registry, characteristics of patients who underwent laparotomy, embolisation, laparotomy and embolisation, or NOM, were compared with the Chi-square test. Poisson regression was used to determine whether the incidence of serious abdominal injury changed over time. Temporal trends in the management of abdominal injury and in-hospital mortality were analysed using, respectively, the Chi-square test for trend, and multivariable logistic regression.

RESULTS

Of 2385 patients with serious abdominal injuries, 69% (n = 1649) had an intervention; predominantly a laparotomy (n = 1166). The proportion undergoing laparotomy decreased from 60% in 2007 to 44% in 2016 (p < 0.001), whilst embolisation increased from 6 to 20% (p < 0.001). Population-adjusted incidence of abdominal injury increased 1.6% per year (IRR 1.016, 95% CI 1.002-1.031; p < 0.024), predominantly in people aged 65 years and over (4.6% per year). Adjusted odds of in-hospital mortality declined 6.0% per year (adjusted odds ratio 0.94; 95% CI 0.89, 1.00; p = 0.04).

CONCLUSIONS

Whilst the incidence of major abdominal trauma increased during the study period, there was a reduction in the proportion of patients managed with laparotomy and reduction in the adjusted odds of in-hospital mortality. Older patients, for whom management is influenced by the complex interplay of frailty and co-morbidities, had lower laparotomy rates.

Selective non-operative management for penetrating splenic trauma: a systematic review

Introduction

The treatment of abdominal solid organ injuries has shifted towards non-operative management (NOM). However, the feasibility of NOM for penetrating splenic trauma is unclear and outcome is believed to be worse than NOM for penetrating liver and kidney injuries. Hence, the aim of the current systematic review was to evaluate the feasibility of selective NOM in penetrating splenic injury.

Methods

A review of literature was performed using Pubmed, Embase and Cochrane databases. Studies on adult patients treated by NOM for splenic injuries were included and outcome was documented and compared.

Results

Five articles from exclusively level-1 and level-2-traumacenters were selected and a total of 608 cases of penetrating splenic injury were included. Nonoperative management was applied in 123 patients (20.4%, range 17–33%). An overall failure rate of NOM of 18% was calculated. Mortality was not seen in patients selected for nonoperative management. Contra-indicatons for NOM included hemodynamic instability, absence of abdominal CT-scanning to rule out concurrent injuries and peritonitis.

Conclusions

This review demonstrates that non-operative management for penetrating splenic trauma in highly selected patients has been utilized in several well-equipped and experienced trauma centers. NOM of penetrating splenic injury in selected patients is not associated with increased morbidity nor mortality. Data on the less well-equipped and experienced trauma centers are not available. More prospective studies are required to further define exact selection criteria for non-operative management in splenic trauma.

Electronic supplementary material

The online version of this article (10.1007/s00068-019-01117-1) contains supplementary material, which is available to authorized users.

Abdominal stab wound injury in children: Do we need a different approach?

BACKGROUND

Penetrating stab wounds in children are relatively rare and no clear recommendations for the optimal evaluation have been devised. An acceptable traditional approach to the patient with an abdominal stab wound who does not require urgent surgery is selective nonoperative management and serial exams. The use of routine computed tomography remains an actively utilized investigation for these patients at many institutions.

PURPOSE

We hypothesize that the approach to pediatric stab wound victims should be distinctly different than that of adult counterparts in order to minimize radiation exposure.

METHODS

A retrospective cohort study involving abdominal stab wounds among pediatric trauma patients (age < 14) compared with adults between the years 1997 and 2016 was conducted utilizing the Israeli National Trauma Registry.

RESULTS

A total of 92 children and 4444 adults were identified from the registry for inclusion. Among the children 20 (21.7%) patients had intraabdominal injury compared to 1730 (38.9%) among adult counterparts. Four children were hemodynamically unstable, two of them were referred directly to operating room and two others were treated without surgery. Among the remaining 88 children there was no observed mortality.

CONCLUSIONS

The majority of pediatric stab wounds trauma victims have minor abdominal injuries. We do not recommend the routine utilization of abdominal CT scan in the evaluation of abdominal stab wounds. Observation with serial exams and minimization of radiation exposure from CT are warranted in this unique population.

TYPE OF STUDY

Retrospective comparative study.

LEVEL OF EVIDENCE

3.

Splenic trauma: WSES classification and guidelines for adult and pediatric patients

Spleen injuries are among the most frequent trauma-related injuries. At present, they are classified according to the anatomy of the injury. The optimal treatment strategy, however, should keep into consideration the hemodynamic status, the anatomic derangement, and the associated injuries. The management of splenic trauma patients aims to restore the homeostasis and the normal physiopathology especially considering the modern tools for bleeding management. Thus, the management of splenic trauma should be ultimately multidisciplinary and based on the physiology of the patient, the anatomy of the injury, and the associated lesions. Lastly, as the management of adults and children must be different, children should always be treated in dedicated pediatric trauma centers. In fact, the vast majority of pediatric patients with blunt splenic trauma can be managed non-operatively. This paper presents the World Society of Emergency Surgery (WSES) classification of splenic trauma and the management guidelines.

Non-operative management for penetrating splenic trauma: how far can we go to save splenic function?

BACKGROUND

Selective non-operative management (NOM) for the treatment of blunt splenic trauma is safe. Currently, the feasibility of selective NOM for penetrating splenic injury (PSI) is unclear. Unfortunately, little is known about the success rate of spleen-preserving surgical procedures. The aim of this study was to investigate the outcome of selective NOM for penetrating splenic injuries.

METHODS

A dual-centre study is performed in two level-one trauma centres. All identified patients treated for PSI were identified. Patients were grouped based on the treatment they received. Group one consisted of splenectomised patients, the second group included patients treated by a spleen-preserving surgical intervention, and group three included those patients who were treated by NOM.

RESULTS

A total of 118 patients with a median age of 27 and a median ISS of 25 (interquartile range (IQR) 16-34) were included. Ninety-six patients required operative intervention, of whom 45 underwent a total splenectomy and 51 underwent spleen-preserving surgical procedures. Furthermore, 22 patients (12 stab wounds and 10 gunshot wounds) were treated by NOM. There were several anticipated significant differences in the baseline encountered. The median hospitalization time was 8 (5-12) days, with no significant differences between the groups. The splenectomy group had significantly more intensive care unit (ICU) days (2(0-6) vs. 0(0-1)) and ventilation days (1(0-3) vs. 0(0-0)) compared to the NOM group. Mortality was only noted in the splenectomy group.

CONCLUSIONS

Spleen-preserving surgical therapy for PSI is a feasible treatment modality and is not associated with increased mortality. Moreover, a select group of patients can be treated without any surgical intervention at all.

Conservative Management of Combined Pleural and Splenic Injury During Percutaneous Nephrostolithotomy

Splenic injuries related to percutaneous nephrostolithotomy (PCNL) are infrequent. Herein, we report a combined splenic and pleural injury incurred during PCNL along with radiographic images documenting the complication. A review of management techniques for similar injuries is included.

Laparoscopic Splenectomy in Patients With Spleen Injuries

INTRODUCTION

Spleen injury appears in 10% to 30% of abdominal trauma patients. Mortality among the patients in the last 20 years remains high (6% to 7%) and shows no tendency to decline. Nowadays nonoperative management is widely accepted management of patients with low-grade spleen injury, whereas management of patients with high-grade spleen injury (III and higher) is not so obvious. There are 3 methods exist in treatment of such patients: conservative (with or without angioembolization), spleen-preserving operations, and splenectomy. Today laparoscopic splenectomy is not a widely used operation and only few studies reported about successful use of laparoscopic splenectomy in patients with spleen injury.The aim of the study was to determine indications and contraindications for laparoscopic splenectomy in abdominal trauma patients and to analyze results of the operations.

PATIENTS AND METHODS

The study involved 42 patients with spleen injury grade III who were admitted in our institute in the years of 2010 to 2014. The patients were divided in 2 groups. Laparoscopic splenectomy was performed in 23 patients (group I) and "traditional" splenectomy was carried out in 19 patients (group II). There was no difference in the demographic data and trauma severity between the 2 groups. Noninvasive investigations, such as laboratory investigations, serial abdominal ultrasound examinations, x-ray in multiple views, and computed tomography had been performed before the decision about necessity of an operation was made.

RESULTS

Patients after laparoscopic operations had better recovering conditions compared with patients with the same injury after "traditional" splenectomy. Neither surgery-related complications nor mortalities were registered in both groups. Laparoscopic splenectomy was more time-consuming operation than "traditional" splenectomy. We suggest that as experience of laparoscopic splenectomy is gained the operation time will be reduced.

CONCLUSIONS

Laparoscopic splenectomy is a safe feasible operation in patients with spleen injury. The operation is indicated in patients with spleen laceration >3 cm of parenchymal depth with moderate continuing bleeding or expanding hematoma and contraindicated in patients with hemodynamic instability and high bleeding rate (>500 mL/h on serial ultrasound examinations).

Anticipated Transfusion Requirements and Mortality in Patients with Orthopedic and Solid Organ Injuries

Long bone fractures are cited as an etiology for significant blood loss; however, there is scant supporting literature. We examined the relationship between long bone fractures, blood transfusions, and solid organ injuries. We hypothesize that transfusions are rare with long bone fractures in the absence of a liver or splenic injury. We performed a retrospective analysis of patients admitted with femur, tibia, and humerus fractures. Outcomes included transfusion requirements and mortality. A total of 1837 patients were included. There were 182 patients with at least one solid organ injury. A greater portion of patients with femur fractures and a lower proportion of patients with tibia fractures required transfusion. Adjusting for solid organ injuries, there was no difference in transfusions for any patient with these fractures compared with the group, or when grouped by organ injury severity. A solid organ injury significantly increases the risk of death among patients with long bone fractures. Blood loss requiring transfusion in patients with orthopedic and solid organ injuries should not be attributed to the presence of fractures alone. The need for transfusions in these patients should lower the threshold for reimaging or intervention for the solid organ injury. Further study is warranted to quantify blood loss by fracture type with or without solid organ.

Multidetector CT for Penetrating Torso Trauma: State of the Art

The use of computed tomography (CT) for hemodynamically stable victims of penetrating torso trauma continues to increase but remains less singular to the work-up than in blunt trauma. Research in this area has focused on the incremental benefits of CT within the context of evolving diagnostic algorithms and in conjunction with techniques such as laparoscopy, endoscopy, and angiographic intervention. This review centers on the current state of multidetector CT as a triage tool for penetrating torso trauma and the primacy of trajectory evaluation in diagnosis, while emphasizing diagnostic challenges that have lingered despite tremendous technological advances since CT was first used in this setting 3 decades ago. As treatment strategies have also changed considerably over the years in parallel with advances in CT, current management implications of organ-specific injuries depicted at multidetector CT are also discussed.