Multiple nail gun injuries: suicide or homicide?

Nail gun injuries are a forensic problem; it can be difficult to distinguish self-inflicted injuries from accident and homicide instances. This kind of injuries shares some characteristics with both gunshot and puncture wounds. We describe a peculiar case of a man who committed suicide driving nails into his skull using a pneumatic nail gun. Entrance wounds were found on both temporal regions of the head. Reviewing scientific literature, this is the first case in Italy reporting the macroscopic data of bilateral head and brain nail gun injuries during an autopsy. Circumstantial elements were not sufficient to clarify if these lesions were self-inflicted, inflicted by accident, or else. Radiological examination can be helpful to show the exact location of the nails, but it has also its own limitations. We firmly believe that autopsy, especially the head section, is crucial to identify the nature and the extension of these lesions, thus giving us much more information about the mechanism of death and the circumstances in which it occurred.

Intracranial Pressure and Brain Tissue Oxygen Multimodality Neuromonitoring in Gunshot Wounds to the Head in Children.

OBJECTIVE: Gunshot wounds to the head (GSWH) are a cause of severe penetrating traumatic brain injury (TBI). Although multimodal neuromonitoring has been increasingly used in blunt pediatric TBI, its role in the pediatric population with GSWH is not known. We report on 3 patients who received multimodal neuromonitoring as part of clinical management at our institution and review the existing literature on pediatric GSWH. METHODS: We identified 3 patients ≤18 years of age who were admitted to a quaternary children's hospital from 2005 to 2021 with GSWH and received invasive intracranial pressure (ICP) and Pbto2 (brain tissue oxygenation) monitoring with or without noninvasive near-infrared spectroscopy (NIRS). We analyzed clinical and demographic characteristics, imaging findings, and ICP, Pbto2, cerebral perfusion pressure, and rSo2 (regional cerebral oxygen saturation) NIRS trends. RESULTS: All patients were male with an average admission Glasgow Coma Scale score of 4. One patient received additional NIRS monitoring. Episodes of intracranial hypertension (ICP ≥20 mm Hg) and brain tissue hypoxia (Pbto2 <15 mm Hg) or hyperemia (Pbto2 >35 mm Hg) frequently occurred independently of each other, requiring unique targeted treatments. rSo2 did not consistently mirror Pbto2. All children survived, with favorable Glasgow Outcome Scale-Extended score at 6 months after injury. CONCLUSIONS: Use of ICP and Pbto2 multimodality neuromonitoring enabled specific management for intracranial hypertension or brain tissue hypoxia episodes that occurred independently of one another. Multimodality neuromonitoring has not been studied extensively in pediatric GSWH; however, its use may provide a more complete picture of patient injury and prognosis without significant added procedural risk.

Diagnosis and management of occult non-missile penetrating brain injury.

Penetrating brain injury (PBI) is a subtype of traumatic brain injury (TBI) that has been steadily increasing in prevalence and causing significant mortality in trauma patients. In an emergent setting, it is important to determine the mechanism of injury and decide whether a PBI or a blunt TBI has occurred in order to guide diagnostic imaging and subsequent treatment. In cases where a PBI has been likely or has occurred, it is important to initiate treatment expeditiously as rapid interventions have been shown to lead to better outcomes. However, in cases of unwitnessed pediatric trauma, it can be difficult to ascertain the specific method of injury due to a lack of reliable sources. In such cases of unwitnessed trauma, PBI should be included in the differential of any orbitocranial injury. In this series, we present two cases of unwitnessed pediatric orbitocranial injury that highlight the importance of gathering a detailed history, obtaining appropriate imaging studies, and using physician intuition.

Transorbital penetrating head injury by a wooden chopstick in the cavernous sinus: a case report and literature review.

Penetrating head injury is a relatively rare condition associated with high morbidity and mortality. Although the immediate treatment of penetrating head injury is needed, surgical strategies are varied based on the trajectory of the penetrating objects in the cranium. We present a case of 24-year-old man who sustained a transorbital penetrating injury caused by a wooden chopstick. Neuroimages revealed a linear lesion extending from the left intraorbital segment to the cavernous sinus passing through the superior orbital fissure. The foreign body was successfully removed via the transcranial approach without complications. A careful management based on the perioperative images and correct diagnosis is necessary to avoid unfavorable complications. Four cases of transorbital penetrating injuries have been previously reported, in which the foreign body penetrated through the superior orbital fissure and lodged in the cavernous sinus. The frontotemporal craniotomy with extradural approach can be a useful option to remove foreign bodies around the cavernous sinus regions.

Construction Industry-Associated Penetrating Craniocerebral Injuries.

BACKGROUND: Various high-energy tasks in the construction industry can lead to craniocerebral injuries. Construction industry-associated penetrating craniocerebral injuries due to metal foreign bodies have unique characteristics. However, no norms exist for removing metal foreign bodies and preventing secondary trauma. This study aimed to explore the characteristics and treatment of construction industry-associated penetrating craniocerebral injuries due to metal foreign bodies. METHODS: Data of patients who suffered from penetrating injuries due to metal foreign bodies and were treated in the Zhongshan People's Hospital from 2001 to 2021 were collected based on the causes of injuries to explore disease characteristics and therapeutic effects. RESULTS: A total of six patients with penetrating craniocerebral injuries due to metal foreign bodies, who underwent surgeries, were included in the study. Five patients recovered well after the surgery, and one patient died. In four patients, intracranial infection complicated the course after surgery, and two patients had delayed intracranial hematoma. CONCLUSION: Patients with construction industry-associated penetrating craniocerebral injuries due to metal foreign bodies are prone to coma and intracranial vascular injuries. Early surgical removal and prevention of intracranial infection are key to achieving good therapeutic effects.

Surviving a Self-inflicted Transorbital Pen Intrusion to the Cerebellum: Case Report.

BACKGROUND: Although intracranial traumas by penetrating foreign objects are not absolute rarities, the nature of trauma, the kind of object, and its trajectory make them a one of a kind case every time they occur. Whereas high-velocity traumas mostly result in fatalities, it is the low-velocity traumas that demand an individualized surgical strategy. METHODS: We present a case report of a 33-year-old patient who was admitted to our department with a self-inflicted transorbital pen injury to the brain. The authors recall the incident and the technique of the pen removal. RESULTS: Large surgical exposure of the pen trajectory was considered too traumatic. Therefore, we opted to remove the pen and have an immediate postoperative computed tomography (CT) scan. Due to its fragility, the pen case could only be removed with a screwdriver, inserted into the case. Post-op CT scan showed a small bleeding in the right peduncular region, which was treated conservatively. The patient was transferred back to intensive care unit and woken up the next day. She lost visual function on her right eye, but suffered from no further neurologic deficit. CONCLUSION: Surgical management of removal of intracranial foreign bodies is no routine procedure. Although some would favor a large surgical exposure, we could not think of an approach to do so without maximum surgical efforts. We opted for a minimal surgical procedure with immediate CT scan and achieved an optimal result. We find this case to be worth considering when deciding on a strategy in the future.

Simple wound closure compared with surgery for civilian cranial gunshot wounds.

OBJECTIVE: A carefully selected subset of civilian cranial gunshot wound (CGSW) patients may be treated with simple wound closure (SWC) as a proactive therapy, but the appropriate clinical scenario for using this strategy is unknown. The aim of this study was to compare SWC and surgery patients in terms of their neurological outcomes and complications, including infections, seizures, and reoperations. METHODS: This was a single-center, retrospective review of the prospectively maintained institutional traumatic brain injury and trauma registries. Included were adults who sustained an acute CGSW defined as suspected or confirmed dural penetration. Excluded were nonfirearm penetrating injuries, patients with an initial Glasgow Coma Scale (GCS) score of 3, patients with an initial GCS score of 4 and nonreactive pupils, and patients who died within 48 hours of presentation. RESULTS: A total of 67 patients were included; 17 (25.4%) were treated with SWC and 50 (74.6%) were treated with surgery. The SWC group had a lower incidence of radiographic mass effect (3/17 [17.6%] SWC vs 31/50 [62%] surgery; absolute difference 44.4, 95% CI -71.9 to 16.8; p = 0.002) and lower incidence of involvement of the frontal sinus (0/17 [0%] SWC vs 14/50 [28%] surgery; absolute difference 28, 95% CI -50.4 to 5.6; p = 0.01). There were no differences in the frequency of Glasgow Outcome Scale-Extended scores ≥ 5 between the SWC and surgery groups at 30 days (4/11 [36.4%] SWC vs 12/35 [34.3%] surgery; OR 1.1, 95% CI 0.3-4.5; p > 0.99), 60 days (2/7 [28.6%] SWC vs 8/26 [30.8%] surgery; OR 0.9, 95% CI 0.3-3.4; p > 0.99), and 90 days (3/8 [37.5%] SWC vs 12/26 [46.2%] surgery; OR 0.7, 95% CI 0.1-3.6; p > 0.99). There were no differences in the incidence of infections (1/17 [5.9%] SWC vs 6/50 [12%] surgery; OR 0.5, 95% CI 0.1-4.1; p = 0.67), CSF fistulas (2/11 [11.6%] SWC vs 3/50 [6%] surgery; OR 2.1, 95% CI 0.3-13.7; p = 0.60), seizures (3/17 [17.6%] SWC vs 9/50 [18%] surgery; OR 1, 95% CI 0.2-4.1; p > 0.99), and reoperations (3/17 [17.6%] SWC vs 4/50 [8%] surgery; OR 2.5, 95% CI 0.5-12.4; p = 0.36) between the SWC and surgery groups. CONCLUSIONS: There were important clinically relevant differences between the SWC and surgery groups. SWC can be considered a safe and efficacious proactive therapy in a carefully selected subset of civilian CGSW patients.

Successful resuscitation and multidisciplinary management of penetrating brain injury caused by tire explosion: A case report.

RATIONALE: Penetrating brain injury (PBI) is a rare trauma that presents as a difficult and serious surgical emergency for neurosurgeons in clinical practice. Our patient was admitted with a PBI caused by a tire explosion, which is an extremely rare cause of injury. PATIENT CONCERNS: We report a case of a 28-year-old male patient who suffered a PBI when a tire exploded while it was being inflated with a high-pressure air pump. DIAGNOSES: The patient was diagnosed with PBI presenting with multiple comminuted skull fractures, massive bone fragments with foreign bodies penetrating the underlying brain tissue of the top right frontal bone, multiple cerebral contusions, and intracranial hematoma. INTERVENTIONS: Emergency combined multidisciplinary surgery was performed for the removal of the fragmented bone pieces, hematoma, and foreign bodies; decompression of the debridement flap; reconstruction of the anterior skull base; and repair of the dura mater. OUTCOMES: The patient was successfully resuscitated and discharged 1 month later and is now recovering well. LESSONS: Patients with PBI are critically ill. Therefore, timely, targeted examinations and appropriate multidisciplinary interventions through a green channel play a key role in assessing the condition, developing protocols, and preventing complications.

From Henry Shrapnel (1761-1842) to today's neurosurgery: how antipersonnel weapons have laid the foundation of clinical and surgical management of head injury fractures and penetrating brain injuries.

Henry Shrapnel invented an antipersonnel weapon capable of defragmenting with the explosion of charge. Modern grenades or improvised explosive devices may be seen as an evolution of Shrapnel's ammunition. Starting by analyzing the ballistics of these weapons, it is possible to understand the historical evolution of the management of skull fractures and penetrating brain injuries (PBIs). A circular crack line with a splinter at the center, depressed in bone, was a characteristic feature of fractures due to Shrapnel's bullet. Three longitudinal fissures, one medial and two lateral, may be present due to tangential blows. Craniectomy and/or fracture reduction were almost always necessary in these cases. The first document describing medical examination and therapeutic strategies for head-injured patients dates back to 1600 bc (the Edwin Smith Papyrus). Several doctors from the past century, such as Puppe, Matson, and Cushing, proposed different theories about skull fractures and the management of craniocerebral injuries, paving the way for diagnosing and treating these injuries. Shrapnel fractures required wider craniotomies and in the past surgeons had to deal with more severe injuries. Based on past military experiences during what could be called the postshrapnel age, guidelines for the management of PBIs were introduced in 2001. In these guidelines various concepts were reviewed, such as the importance of antibiotics and seizure prevention; included as well were prognostic factors such as hypotension, coagulopathy, respiratory distress, and Glasgow Coma Scale score. Furthermore, they highlight how it has not been possible to reach a common viewpoint on surgical management. Nevertheless, in contrast with the past, it is preferable to be less aggressive regarding retained fragments if there is no intracranial mass effect. Although military situations were useful in building basic principles for PBI guidelines, civilian PBIs differ noticeably from military ones. Therefore, there is a need to review modern guidelines in order to apply them in every situation.

Management of migrating intracranial bullet fragments in a 13-year-old female after firearm brain injury: technical and surgical nuances.

INTRODUCTION: We present the challenges and nuances of management in a rare case of multiple migrating intracranial fragments after pediatric gunshot wound to the head (GSWH). CASE PRESENTATION: A 13-year-old girl suffered left parietal GSWH, with new neurologic decline 3 days after initial debridement. Serial imaging showed the largest intracranial fragments had migrated into the left trigone, and descended further with head of bed (HOB) elevation. HOB was iteratively decreased, with concurrent intracranial pressure monitoring. After extubation, with an alert and stable neurologic exam, HOB was decreased to -15 degrees, allowing gravity-assisted migration of the fragments to an anatomically favorable position within the left occipital horn. The patient underwent occipital craniotomy for fragment retrieval on hospital day 27. Two large and >20 smaller fragments were retrieved using neuronavigation and intraoperative ultrasound. Forensics showed these to be .45 caliber handgun bullet fragments. The patient recovered well after 2-months of intensive inpatient rehabilitation. DISCUSSION: During new neurologic decline after GSWH, bullet migration must be considered and serial cranial imaging is requisite. Surgical retrieval of deep fragments requires judicious planning to minimize further injury. Tightly controlled HOB adjustments with gravity assistance for repositioning of fragments may have utility in optimizing anatomic favorability prior to surgery.

A Rare Case of Craniocervical Penetrating Injury by a Steel Bar.

RATIONALE: Non-missile penetrating injuries caused by foreign bodies, such as knives or sharp wood, are infrequent. We report a 49-year-old male suffering from severe craniocervical penetrating injury by a steel bar was successfully treated by surgery. CHIEF COMPLAINT: The male patient was a 49-year-old builder. Although working on the construction site, an approximately 60 cm steel bar penetrated the patient's brain vertically through the left top of the head presenting with unconsciousness and intermittent irritability. DIAGNOSIS: Computed tomography of the head showed the entrance and exit of the skull damaged by the steel bar. Three-dimensional reconstruction showed that the steel bar entered the skull from the posterior left coronal suture and penetrated the ipsilateral occipital bone, about 5 cm into the neck soft tissue. INTERVENTION: We successfully performed the operation and removed the steel bar. OUTCOMES: The patient was followed up for 5 years; muscle strength returned to normal. LESSONS: Penetrating injuries caused by steel bars are rare, which always cause severe intracranial injury combined with peripheral tissue injury, by sharing our experience in the treatment of this rare case, we hope to provide a reference for similar injuries in the future.

Trauma craneoencefálico penetrante por una herida de arpón. Presentación de un caso / Penetrating cranioencephalic trauma due to harpoon wound. Presentation of a case

RESUMEN Las heridas craneocerebrales penetrantes más frecuentes son las provocadas por armas de fuego; las restantes resultan de rara frecuencia. Se presentó un caso que recibió agresión craneoencefálica por arpón, de forma accidental, fuera del agua. Se describieron los detalles del suceso, los exámenes complementarios, la conducta adoptada, el manejo neuroquirúrgico, y la sorprendente evolución postoperatoria del paciente (AU).

ABSTRACT The most frequent penetrating craniocerebral wounds are those caused by firearms; the remaining ones are rare. We presented a case that received accidental cranioencephalic aggression by harpoon, an event that occurred out of the water. Details of the event, complementary examinations, adopted behavior and neurosurgical management that were decided, as well as the surprising post-operative evolution of the patient were described (AU).

Civilian Firearm-Inflicted Brain Injury: Coagulopathy, Vascular Injuries, and Triage.

PURPOSE OF REVIEW: Civilian firearm-inflicted penetrating brain injury (PBI) carries high morbidity and mortality. Concurrently, the evidence base guiding management decisions remains limited. Faced with large volume of PBI patients, we have made observations in relation to coagulopathy and cerebrovascular injuries. We here review this literature in addition to the question about early prognostication as it may inform neurosurgical decision-making. RECENT FINDINGS: The triad of coagulopathy, low motor score, and radiographic compression of basal cisterns comprises a phenotype of injury with exceedingly high mortality. PBI leads to high rates of cerebral arterial and venous injuries, and projectile trajectory is emerging as an independent predictor of outcome. The combination of coagulopathy with cerebrovascular injury creates a specific endophenotype. The nature and role of coagulopathy remain to be deciphered, and consideration to the use of tranexamic acid should be given. Prospective controlled trials are needed to create clinical evidence free of patient selection bias.

Trans-base and trans-vault low-velocity penetrating brain injury: A retrospective comparative study of characteristics, treatment, and outcomes.

PURPOSE: Low-velocity penetrating brain injury (LVPBI) caused by foreign bodies can pose life-threatening emergencies. Their complexity and lack of validated classification data have prevented standardization of clinical management. We aimed to compare the trans-base and trans-vault phenotypes of LVPBI to help provide guidance for clinical decision-making of such injury type. METHODS: A retrospective study on LVPBI patients managed at our institution from November 2013 to March 2020 was conducted. We included LVPBI patients admitted for the first time for surgery, and excluded those with multiple injuries, gunshot wounds, pregnancy, severe blunt head trauma, etc. Patients were categorized into trans-base and trans-vault LVPBI groups based on the penetration pathway. Discharged patients were followed up by outpatient visit or telephone. The data were entered into the Electronic Medical Record system by clinicians, and subsequently derived by researchers. The demography and injury characteristics, treatment protocols, complications, and outcomes were analyzed and compared between the two groups. A t-test was used for analysis of normally distributed data, and a Mann-Whitney U test for non-parametric data. A generalized linear model was further established to determine whether the factors length of stay and performance scale score were influenced by each factor. RESULTS: A total of 27 LVPBI patients were included in this analysis, comprised of 13 (48.1%) trans-base cases and 14 (51.9%) trans-vault cases. Statistical analyses suggested that trans-base LVPBI was correlated with deeper wounds; while the trans-vault phenotype was correlated with injury by metal foreign bodies. There was no difference in Glasgow Coma Scale score and the risk of intracranial hemorrhage between the two groups. Surgical approaches in the trans-base LVPBI group included subfrontal (n = 5, 38.5%), subtemporal (n = 5, 38.5%), lateral fissure (n = 2, 15.4%), and distal lateral (n = 1, 7.7%). All patients in the trans-vault group underwent a brain convex approach using the foreign body as reference (n = 14, 100%). Moreover, the two groups differed in application prerequisites for intracranial pressure monitoring and vessel-related treatment. Trans-base LVPBI was associated with higher rates of cranial nerve and major vessel injuries; in contrast, trans-vault LVPBI was associated with lower functional outcome scores. CONCLUSION: Our findings suggest that trans-base and trans-vault LVPBIs differ in terms of characteristics, treatment, and outcomes. Further understanding of these differences may help guide clinical decisions and contribute to a better management of LVPBIs.

Wearable Mixed-Reality Holographic Navigation Guiding the Management of Penetrating Intracranial Injury Caused by a Nail.

Penetrating brain injury caused by a nail is an extremely rare neurosurgical emergency that poses a challenge for neurosurgeons. Nail entering the brain from the orbit and lodging within the cranial cavity is even more unusual. A 53-year-old male was found unconscious at a construction site, and brain CT revealed not only the presence of a nail beneath the inner table of the parietal bone, but also traumatic intracerebral hematoma. Consequently, accurate localization of the nail and hematoma was mandatory for surgical plan. During surgical planning, computational model reconstruction and trajectory calculation were completed using preoperative CT in 3D Slicer. Under the guidance of a head-mounted mixed-reality holographic computer, the neurosurgeon was able to visualize and interact with the hologram of the surgical plan, and intraoperative findings demonstrated that our low-cost portable wearable mixed-reality holographic navigation assisted precise localization of the nail and intracerebral hematoma, assuring less injury to the already compromised brain. After the surgery, the patient could obey commands, and postoperative imaging ruled out the possibility of brain abscess during follow-up. To the best of our knowledge, this is the first report on using a low-cost wearable mixed-reality holographic navigation to guide the management of penetrating intracranial injury caused by a nail.

Penetrating Craniocerebral Injury by the Hook of a School Desk.

INTRODUCTION: Although penetrating cranial injuries are rare in pediatric patients, these injuries can lead to morbidity and mortality. Removal of a gigantic foreign body from the cranium requires proper management as it has high risk of further brain damage and seizures. CASE PRESENTATION: We report the case of a patient with cranial injury caused by hitting the head to the hook of a school desk. Due to the extreme nature of the injury, the following additional steps were necessary: taking help from a local firefighter team to cut the desk, surgical removal of the foreign body, and cranioplasty after 6 months. Following this, he was discharged without neurological deficits. DISCUSSION/CONCLUSION: Neurotrauma is one of the major causes of death in children. The damage and effect of the injuring foreign body depends on its size, shape, velocity, trajectory, and entry point. It should be kept in mind that any high-frequency processes applied on the extracranial parts of conductive objects, such as metal bars, may trigger seizures. Preoperative extracranial intervention for huge penetrating foreign bodies should be performed under anticonvulsant administration and intubation to decrease the risk of epileptic seizures and its complications.