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The forensic literature has described unusual wounds of entry into fatal stab wounds that are rarely found in autopsies. Stab wounds are considered fatal injuries when they occur in vital organs. Many authors have suggested that the description of the wound track helps recreate the crime scene. Still, many say that the recreation of a crime scene is a static event, whereas the actual event is dynamic. We received the dead body of a 25-year-old male for postmortem examination. During autopsy, we found a wedge-shaped stab wound in the epigastric region. Interestingly, when we dissected the skin and subcutaneous tissue without disturbing the wound, we observed two separate wedge-shaped wounds over the rectus sheath. A knife can produce an atypical appearance after plunging into the body. With a single external primary stab wound, two different wound tracks can be made internally. Thus, examining only the wound track made it impossible to comment on the circumstances of violence.
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Stabilin-1 (Stab1) and Stabilin-2 (Stab2) are scavenger receptors expressed by liver sinusoidal endothelial cells (LSECs). The Stabilin-mediated scavenging function is responsible for regulating the molecular composition of circulating blood in mammals. Stab1 and Stab2 have been shown to influence fibrosis in liver and kidneys and to modulate inflammation in atherosclerosis. In this context, circulating and localized TGFBi and POSTN are differentially controlled by the Stabilins as their receptors. To assess Stab1 and Stab2 functions in inflammatory and fibrotic skin disease, topical Imiquimod (IMQ) was used to induce psoriasis-like skin lesions in mice and Bleomycin (BLM) was applied subcutaneously to induce scleroderma-like effects in the skin. The topical treatment with IMQ, as expected, led to psoriasis-like changes in the skin of mice, including increased epidermal thickness and significant weight loss. Clinical severity was reduced in Stab2-deficient compared to Stab1-deficient mice. We did not observe differential effects in the skin of Stabilin-deficient mice after bleomycin injection. Interestingly, treatment with IMQ led to a significant increase of Stabilin ligand TGFBi plasma levels in Stab2-/- mice, treatment with BLM resulted in a significant decrease in TGFBi levels in Stab1-/- mice. Overall, Stab1 and Stab2 deficiency resulted in minor alterations of the disease phenotypes accompanied by alterations of circulating ligands in the blood in response to the disease models. Stabilin-mediated clearance of TGFBi was altered in these disease processes. Taken together our results suggest that Stabilin deficiency-associated plasma alterations may interfere with preclinical disease severity and treatment responses in patients.
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INTRODUCTION: We previously published the outcomes associated with the use of diagnostic laparoscopy to determine peritoneal breach for AASW patients without an immediate indication for laparotomy. Although this pathway was 100% sensitive there was a 54% non-therapeutic laparotomy rate. Another option that has been extensively reported is the clinical observation algorithm (COA) however, majority of the data originate from high-volume centres. We hypothesized that a COA would also be a safe option in an Australian setting, and reduce the rate of non-therapeutic operative intervention in managing AASW. METHODS: This was a prospective cohort study examining patients with AASW admitted to a level 1 trauma centre in Sydney, Australia, between June 2021 and August 2023. Patient, injury, management and outcome data were collected from electronic medical records and the hospital trauma registry. Data were then analysed to determine the diagnostic accuracy of the COA, complication rates and median hospital length-of-stay (LOS). RESULTS: A total of 48 patients presented with AASW. Of these patients, 11 (22.9%) proceeded to immediate laparotomy. Seven patients had a contraindication to COA and underwent diagnostic laparoscopy. Thirty patients were managed with the COA, with three (10%) patients subsequently requiring a laparotomy. Only one patient (3.3%) underwent a non-therapeutic laparotomy. There were no missed injuries. The COA sensitivity was 100%, specificity 92.7%, PPV 50% and NPV 100%. Patients managed with COA had no complications. Overall median hospital LOS was 1 day (1.0-2.3). CONCLUSION: A COA is a safe approach for evaluating patients with AASW in an Australian setting with adequate resources. It reduces the rate of non-therapeutic operative intervention and has acceptable outcomes compared with a diagnostic laparoscopy pathway.
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In cases of traumatic deaths, accurate assessment of injuries is essential for both legal and medical purposes. This case report compares the findings of post-mortem computed tomography with conventional autopsy methods in assessing abdominal stab wounds. A 34-year-old woman with multiple stab wounds in the abdomen underwent post-mortem examination, including computed tomography imaging. Computed tomography revealed specific breaches in the skin's continuity and internal injuries, including perforation of the stomach. A conventional autopsy confirmed the presence of multiple stab wounds and associated injuries to internal structures. However, additional injuries to major blood vessels, such as the abdominal aorta and inferior vena cava, were only detected during manual exploration of the peritoneal cavity. This case highlights the complementary roles of post-mortem computed tomography and conventional autopsy in evaluating traumatic injuries. While computed tomography imaging offers non-invasive visualisation of injuries, manual examination remains essential for identifying certain injuries, particularly those affecting major blood vessels. The integration of computed tomography imaging with traditional autopsy methods enhances the accuracy and reliability of forensic assessments in cases of traumatic deaths, particularly in complex cases involving multiple injuries. Understanding the strengths and limitations of these techniques is crucial for improving forensic investigations and ultimately enhancing medico-legal outcomes.
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TAK1-binding protein 1 (TAB1) assembles with TAK1 through its C-terminal domain, leading to the self-phosphorylation and activation of TAK1, which plays an important role in the activation of NF-κB and MAPK signaling pathway. Pseudorabies virus (PRV) is the pathogen of Pseudorabies (PR), which belongs to the Alphaherpesvirus subfamily and causes serious economic losses to the global pig industry. However, the impact of swine TAB1 (sTAB1) on PRV infection has not been reported. In this study, evidence from virus DNA copies, virus titer and western blotting confirmed that sTAB1 could inhibit PRV replication and knockout of sTAB1 by CRISPR-Cas9 gene editing system could promote PRV replication. Further mechanistic studies by real-time PCR and luciferase reporter gene assay demonstrated that sTAB1 could enhance the production of inflammatory factors and chemokines, IFN-ß transcription level and IFN-ß promoter activity after PRV infection. In summary, we clarify the underlying mechanism of sTAB1 in inhibiting PRV replication for the first time, which provides a new idea for preventing PRV infection and lays a foundation for PRV vaccine development.
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Herpesvirus Suido 1 , Seudorrabia , Replicación Viral , Animales , Herpesvirus Suido 1/genética , Herpesvirus Suido 1/fisiología , Porcinos , Seudorrabia/virología , Enfermedades de los Porcinos/virología , Proteínas Adaptadoras Transductoras de Señales/genética , Proteínas Adaptadoras Transductoras de Señales/metabolismo , Línea Celular , Sistemas CRISPR-Cas , Interferón beta/genética , Interferón beta/metabolismoRESUMEN
Background: In recent years, the improvement of common standards of forensic practice has received attention to promote an unambiguous and better-quality forensic investigation method. Although most hanging deaths are attributed to suicides, cases occasionally occur due to accidents or homicides. From an investigative point of view, hanging deaths are usually straightforward, but unusual circumstances may raise suspicions of crime. This includes complex suicides, which are rare events pursued by victims with two or more different fatal methods and can be classified as planned or unplanned, depends on whether the methods are applied simultaneously or sequentially. The multiplicity of injuries detected can often lead to misinterpretations, thus making a multidisciplinary approach extremely important. Case Report: A 44-year-old man, after requesting law enforcement, has been instead found inside a garden of an uninhabited property located a few kilometers away from his own property, suspended from a beam with wire; the wire created a noose at the back of his head, his hands were placed at his neck, and stab wounds were found. Conclusions: The crime scene investigation, interview of relatives, autopsy, histological and toxicological examinations, and GAP led to the determination that the death was suicide. This comprehensive approach emphasizes the importance of meticulous investigation and analysis to reach accurate conclusions in forensic cases.
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Causas de Muerte , Homicidio , Suicidio Completo , Humanos , Masculino , Adulto , Medicina Basada en la Evidencia , Traumatismos del Cuello , Suicidio , Autopsia , Medicina Legal/métodos , Heridas PunzantesRESUMEN
The prevalence of central nervous system (CNS) dysfunction as a result of disease or trauma remains a clinically unsolved problem which is raising increased awareness in our aging society. Human Dental Pulp Stem Cells (hDPSCs) are excellent candidates to be used in tissue engineering and regenerative therapies of the CNS due to their neural differentiation ability and lack of tumorigenicity. Accordingly, they have been successfully used in animal models of spinal cord injury, stroke and peripheral neuropathies. The ideal therapy in brain injury should combine strategies aiming to protect the damaged lesion and, at the same time, accelerate brain tissue regeneration, thus promoting fast recovery while minimizing side or long-term effects. The use of bioresorbable nanopatterned poly(lactide-co-É-caprolactone) (PLCL) polymeric scaffolds as hDPCSs carriers can represent an advantage for tissue regeneration. In this chapter, we describe the surgical procedures to implant functionalized bioresorbable scaffolds loaded with hDPSCs to improve the brain lesion microenvironment in an intracranial stab wound injury model severing the rostral migratory stream (RMS) that connects the brain subventricular zone (SVZ) and the olfactory bulb in nude mice. Additionally, we also describe the technical steps after animal sacrifice for histological tissue observation and characterization.
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Pulpa Dental , Modelos Animales de Enfermedad , Ratones Desnudos , Células Madre , Andamios del Tejido , Pulpa Dental/citología , Animales , Humanos , Andamios del Tejido/química , Ratones , Células Madre/citología , Trasplante de Células Madre/métodos , Heridas Punzantes/terapia , Implantes Absorbibles , Lesiones Encefálicas/terapia , Lesiones Encefálicas/patología , Ingeniería de Tejidos/métodosRESUMEN
INTRODUCTION: Homicides using knives or other sharp objects are the most common type of homicide in Europe, and the second most common type of homicide worldwide. In contrast, suicides using sharp objects are rarer, constituting only a few per cent of all suicides in western countries. We investigated single stab injuries to the trunk in both homicides and suicides to assess differences in extent of injuries and in medical care, which could be of value for trauma management, public health and forensic assessment. METHODS: We identified all cases in Sweden between 2010 and 2021 that died of a single stab to the trunk, in either a homicide (n = 94) or a suicide (n = 45), and that were the subject of a forensic autopsy. We obtained data on demographics, hospital care and injured structures. To assess the severity of injuries, we applied AIS (Abbreviated Injury Score) and NISS (New Injury Severity Score). The inter-rater reliability of NISS between two raters was evaluated with intra-class correlation (ICC), with 95 % confidence intervals (CI). The data was analysed using Fisher's exact test, Mann-Whitney U test and logistic regression models. RESULTS: The inter-rater reliability between the two NISS raters showed an ICC of 0.87 (95 % CI 0.68-0.95). We observed a larger variation of injuries in suicides, with a higher proportion of both unsurvivable (NISS 75) and minor injuries (NISS ≤ 8) (66.7 % and 8.9 % respectively) compared to in homicides (46.8 % and 0 % respectively). We observed a larger proportion of injuries to the heart in suicides (68.9% vs. 46.8 %, p = 0.018). In homicides, injuries involving vessels (52.1% vs. 13.3 %, p < 0.001) and hospital care (56.4 % vs. 8.9 %, p < 0.001) were significantly more common compared to suicides. DISCUSSION AND CONCLUSION: Causation (self-inflicted or assaults) seems to be associated with characteristics of injury and the likelihood of receiving hospital care. These findings could potentially be valuable for trauma management and forensic assessment of manner of death, however, determining the mortality of the injuries would require a comparison group comprising injured survivors.
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Homicidio , Heridas Punzantes , Humanos , Suecia/epidemiología , Masculino , Femenino , Homicidio/estadística & datos numéricos , Heridas Punzantes/mortalidad , Adulto , Persona de Mediana Edad , Anciano , Autopsia , Adulto Joven , Suicidio Completo/estadística & datos numéricos , Puntaje de Gravedad del Traumatismo , Adolescente , Reproducibilidad de los Resultados , Suicidio/estadística & datos numéricos , Medicina LegalRESUMEN
Background: Median sternotomy is a common surgical procedure during cardiac and pulmonary surgeries. There are many reports of patient injury associated with wire breakage. However, there are only a few reports of healthcare worker injuries by sternal wire. Case Presentation: A patient in his 70s, having a history of thoracic aorta replacement, collapsed suddenly and paramedics started mechanical chest compression. On hospital arrival, the emergency department nurse attempted to initiate manual chest compression but was injured by a sternal wire protrusion on the patient's chest. The emergency physician placed gauze on the sternal wire and continued manual chest compression, but the patient died. Conclusion: To prevent this injury, cardiopulmonary resuscitation (CPR) providers should consciously check the patient's chest. If they observe wire exposure, they should immediately place a gauze, pad or consider performing mechanical chest compression. Safety measures such as the installing rubber pads in the AED should be considered.
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Background: Penetrating thoracic trauma with coronary artery transection is a lethal injury, but is rare. We report a case of a cardiac stab wound with coronary artery transection that was successfully treated after preoperative diagnosis. Case Presentation: A 36-year-old man was transferred to our emergency department with a left chest stab wound. A coronary computed tomography-angiography scan, including coronary angiography, revealed left hemopneumothorax and left anterior descending branch transection, with ischemic changes in the left ventricular myocardium. Given the diagnosis of coronary artery transection and the absence of injury to the surrounding arteries, we were able to perform coronary artery bypass surgery using the left internal thoracic artery. The patient's postoperative course was good, and he was discharged on foot without major complications 18 days after surgery. Conclusion: Unless a resuscitative thoracotomy is required, a preoperative computed tomography scan, including coronary angiography, may be useful for accurate preoperative diagnosis for patients at high risk of myocardial or coronary artery injury.
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Traumatic penetrating cardiac injury is a rare pathology with a high mortality rate, more commonly occurring in a military setting or during violent assaults in a civilian environment. Given the anatomy, these injuries are often managed by cardiothoracic surgeons. However, in an institute that lacks these specialists, the responsibility for managing this condition falls on the shoulders of the general surgeon on call. We herein report a case where a penetrating cardiac injury was managed successfully by general surgeons in the absence of cardiothoracic surgeons. This case serves two educational purposes. The first is that Caribbean hospitals possess the potential to match a developed country's medical standard if additional resources can be obtained from their respective governing bodies. The second is that a general surgeon's role is not yet finished in the modern era of sub-specialization, especially in a setting that lacks dedicated specialists.
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Full-scale drilling for shale gas has been deepening, and the horizontal definitions have been increasing for drilling efficiency. Pressures and bending stresses are generated in the joints of gas-cored pipes, which seriously affect their durability. Premium casing connections are primarily forced at the interfaces of two parts, so the design of the threads is crucial, and the choice of optimal parameters is precisely related to their resistance to stresses. This article proposes a novel premium connection design, and its performance is validated through simulations to demonstrate good noise, vibration, and harshness (NVH) and durability performance. A parametric study is especially performed with the change of lower corner radius to observe maximum stress changes of the system and it is advised that a parameter be optimized. This study demonstrates that it is possible to design a premium connection capable of reducing the stress concentrated on the stab flank contact portion when drilling deep gas wells in response to parameter changes.
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BACKGROUND: In this diagnostic accuracy study, we examined the effectiveness of neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and systemic immune inflammation index (SII) in predicting the need for surgical intervention in patients with anterior abdominal stab wounds (AASW) who exhibit unclear findings on physical examination yet remain hemodynamically stable. METHODS: Over a 7-year period, patients with AASW were retrospectively analyzed. Patients were divided into two groups as surgical (SG) and nonsurgical group (nSG). The SG were also divided into two groups as therapeutic surgery (TS) group and the non-therapeutic surgery (nTS) group. The groups were compared in terms of NLR, PLR values and SII scores. RESULTS: In a retrospective analysis of 199 patients with AASW, NLR, PLR and SII obtained during clinical follow-up of patients with AASW in whom the necessity for immediate surgery was unclear significantly predicted therapeutic surgery (p < 0.001 for all). These parameters did not show a significant difference in predicting the need for surgery at the admission. NLR showed an AUC of 0.971 and performed significantly better than PLR and SII (AUC = 0.874 and 0.902, respectively) in predicting TS. The optimal cut-off value for NLR was 3.33, with a sensitivity of 98.2%, a specificity of 90%, and a negative likelihood ratio of 0.02. Time from admission to surgery was significantly shorter in the TS group (p = 0.001). CONCLUSION: NLR, PLR and SII values may be useful in predicting therapeutic surgery during clinical follow-up in AASW patients with unclear physical examination findings and in whom immediate surgical decisions cannot be made.
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Traumatismos Abdominales , Neutrófilos , Heridas Punzantes , Humanos , Masculino , Femenino , Estudios Retrospectivos , Adulto , Heridas Punzantes/cirugía , Heridas Punzantes/sangre , Traumatismos Abdominales/cirugía , Traumatismos Abdominales/sangre , Persona de Mediana Edad , Linfocitos , Recuento de Linfocitos , Inflamación/sangre , Recuento de Plaquetas , Valor Predictivo de las Pruebas , Adulto Joven , Plaquetas , Recuento de LeucocitosRESUMEN
INTRODUCTION: This paper reviews our experiences with the management of patients with torso stab wounds and potential injuries in both the chest and abdomen over the last decade. The aim of the project is to clarify our approach and provide an evidence base for clinical algorithms. We hypothesize that there is room for our clinical algorithms to be further refined in order to address the diverse, life threatening injuries that can result from stab wounds to the torso. METHODS: Patients with one or more torso stab wounds, and a potential injury in both the chest and the abdomen were identified from a local database for the period December 2012 to December 2020. RESULTS: A total of 899 patients were identified. The mean age was 29 years (SD = 9) and 93% of patients were male. Amongst all patients, 686 (76%) underwent plain radiography, 207 (23%) a point of care ultrasound assessment, and 171 (19%) a CT scan. Following initial resuscitation, assessment and investigation, a total of 527 (59%) patients proceeded to surgery. A total of 185 patients (35%) underwent a semi elective diagnostic laparoscopy to exclude an occult diaphragm injury. Of the 342 who underwent an emergency operation, 9 patients (1%) required thoracotomy or sternotomy exclusively, 299 patients (33%) required a laparotomy exclusively and 34 patients (4%) underwent some form of dual cavity exploration. In total, there were 16 deaths, a mortality rate of 2%. The use of laparoscopy, point of care ultrasound and subxiphoid pericardial window increased over the period of this study. CONCLUSIONS: Patients with torso stab wounds and potential injuries above and below the diaphragm are challenging to manage. The highly structured clinical algorithm of the ATLS course should be complemented by the use of point of care ultrasound and sub-xiphoid window to assess the pericardium. These adjuncts reduce the likelihood of negative exploration and incorrect operative sequencing.
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Traumatismos Abdominales , Sistemas de Atención de Punto , Traumatismos Torácicos , Ultrasonografía , Heridas Punzantes , Humanos , Heridas Punzantes/diagnóstico por imagen , Heridas Punzantes/cirugía , Masculino , Adulto , Femenino , Traumatismos Torácicos/diagnóstico por imagen , Traumatismos Abdominales/diagnóstico por imagen , Estudios Retrospectivos , Toracotomía/métodos , Algoritmos , Tomografía Computarizada por Rayos X , Laparoscopía , Esternotomía , Incertidumbre , Adulto JovenRESUMEN
This paper presents research on several factors influencing the stabbing behaviour of stratified panels made of aramid fabric Twaron® SRM509 Teijin Aramid BV (Arnhem, The Netherlands). The inputs in the test campaign were the number of layers, the impact energy, and the sample size. Tests were performed on small samples (130 mm × 130 mm) on an Instron® CEAST 9350 drop-tower impact system (Norwood, MA, USA) and on larger samples (400 mm × 400 mm) using a test installation with the same values of the impact energy. Knife type S1 was used, with the geometry recommended in NIJ Standard 0115.00 Stab Resistance of Body Armor SEM, and macro photography investigations revealed the failure mechanisms of panel, layers and fibres. A very important conclusion of this study regarding the stabbing performance of fabric Twaron® SRM 509 in particular, but also in general for panels for body protection is that a research study could start on small size samples, with an accurately instrumented machine, in order to establish the influence of significant factors of stab resistance (energy level, number of layers in a panel, etc.), as these samples are less expensive and less time consuming, but the study should be continued to examine larger size samples. The obtained data are useful for the prototype.
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Post-traumatic ventricular pseudoaneurysms are a rare complication of chest trauma that necessitate surgical correction. In this case report, we describe a 22-year-old male patient presenting with a left ventricular pseudoaneurysm 45 days following primary surgical repair of a penetrating left ventricular injury with a background of stabbing chest trauma. The pseudoaneurysm was successfully surgically treated at our hospital after a thorough evaluation despite the vague clinical presentation at the time of referral. The patient fully recovered afterward and his case enriched our understanding of this life-threatening yet rare complication.
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Penetrating cardiac injuries are rare but are one of the most urgent emergencies because they require early intervention in order to prevent death. The mortality rate of such injuries, including pre-hospitalization deaths, goes up to 90%. The most commonly injured heart chamber is the right ventricle since it takes over half of the anterior thoracic wall. The left ventricle is injured less often, but these patients usually have worse prognoses and higher mortality rates because such injuries lead to hemodynamic instability faster. We present a unique case of a suicide attempt in which the patient stabbed himself with a knife, penetrated the left ventricle, and survived even though he transected the second diagonal branch of the left anterior descending coronary artery and pulled the knife out of his chest.
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Differentiating homicidal or suicidal deaths in presence of a singular stab wound to the anterior or lateral trunk is still a challenge in forensic practice. There are numerous criteria in the literature and in current forensic textbooks to distinguish between self-inflicted injuries and homicide. The applicability of these criteria in single stab injuries was examined by elucidating 12 suicides and 33 homicides, each with a single stab injury to the anterior or lateral trunk and were largely confirmed. An instrumentality still stuck in the corpse was always associated with a suicide in the given cohort. In summary, the final evaluation should always be based on an interpretation of the post mortem findings together with the circumstances on site of discovery as well as the results of the police investigation.
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Homicidio , Heridas Punzantes , Humanos , Heridas Punzantes/patología , Masculino , Femenino , Adulto , Persona de Mediana Edad , Suicidio Completo , Autopsia , Patologia Forense/métodos , Anciano , Suicidio , Torso/lesionesRESUMEN
This case report presents a rare case of an atypical head stab wound suffered by a drug addict and inflicted with a screwdriver during drug-induced psychosis. It describes the diagnostic and treatment procedures in the hospital and the findings of the subsequent autopsy. It also analyzes the review of the interpretation of the CT scans made upon admission and the subsequent treatment by an independent medical review panel, which revealed signs of medical mismanagement. Therefore, it also discusses the legal consequences that the case may have involved for the attending physicians in addition to the consequences for the suspected perpetrator. The report raises many issues encountered in the case in terms of the clinical treatment and forensic determination of the manner of death in cases of injuries caused by sharp instruments and highlights the importance of comprehensive evaluation of the circumstantial evidence together with the clinical or autopsy findings, since such evidence may sometimes be overlooked in clinical practice.
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BACKGROUND: Algorithms for managing penetrating abdominal trauma are conflicting or vague regarding the role of laparoscopy. We hypothesized that laparoscopy is underutilized among hemodynamically stable patients with abdominal stab wounds. METHODS: Trauma Quality Improvement Program data (2016-2019) were used to identify stable (SBP ≥110 and GCS ≥13) patients ≥16yrs with stab wounds and an abdominal procedure within 24hr of admission. Patients with a non-abdominal AIS ≥3 or missing outcome information were excluded. Patients were analyzed based on index procedure approach: open, therapeutic laparoscopy (LAP), or LAP-conversion to open (LCO). Center, clinical characteristics and outcomes were compared according to surgical approach and abdominal AIS using non-parametric analysis. RESULTS: 5984 patients met inclusion criteria with 7 â% and 8 â% receiving therapeutic LAP and LCO, respectively. The conversion rate for patients initially treated with LAP was 54 â%. Compared to conversion or open, therapeutic LAP patients had better outcomes including shorter ICU and hospital stays and less infection complications, but were younger and less injured. Assessing by abdominal AIS eliminated ISS differences, meanwhile LAP patients still had shorter hospital stays. At time of admission, 45 â% of open patients met criteria for initial LAP opportunity as indicated by comparable clinical presentation as therapeutic laparoscopy patients. CONCLUSIONS: In hemodynamically stable patients, laparoscopy remains infrequently utilized despite its increasing inclusion in current guidelines. Additional opportunity exists for therapeutic laparoscopy in trauma, which appears to be a viable alternative to open surgery for select injuries from abdominal stab wounds. LEVEL OF EVIDENCE: Prognostic and Epidemiological; Level IV.