Prevalence of Sexual Strangulation/Choking Among Australian 18-35 Year-Olds.

In Australia, strangulation has been explicitly criminalized in all states and territories. However, it continues to be a "normalized" sexual practice despite its potentially fatal consequences and associated short and long-term sequelae. This research aimed to establish the prevalence of strangulation during sex and examine predictors of positive perceptions toward sexual strangulation in Australia. Confidential, cross-sectional online surveys were conducted with 4702 Australians aged 18-35 years. Participants were 47% cis-men, 48% cis-women, and 4% trans or gender diverse. A total of 57% reported ever being sexually strangled (61% women, 43% men, 79% trans or gender diverse) and 51% reported ever strangling a partner (40% women, 59% men, 74% trans or gender diverse). Differences were found across genders on all variables of sexual strangulation, including frequency of engagement, level of pressure on the neck, consequences, wanting and enjoyment, and how consent was given/received. However, when split by gender, sexual orientation of men and women revealed further differences in behaviors, consequences, and wanting, particularly among straight and bisexual women. After accounting for exposure to strangulation in pornography and previous experience of sexual strangulation, positive perceptions of being strangled (R2 = .51) and strangling a partner (R2 = .53) were predicted by ratings that it could be done safely and social normative factors. These findings suggest strangulation is common during sex among young Australians. Non-stigmatizing education strategies are needed to engage with young people so they have a better understanding of the risks involved and how to negotiate consent and safety regarding sexual strangulation.

Homicidal burial - Forensic issues.

A young woman was buried in a sitting position in sandy soil in a shallow grave. PMCT showed filling of the upper airways with radio-opaque material consistent with soil, with autopsy dissection confirming the presence of soil in the mouth, pharynx, upper oesophagus, larynx, trachea and main bronchi. Death was due to upper airway occlusion by soil. Live burial as a type of homicide is extremely rare. Issues that need to be clarified include whether the victim was alive at the time of burial, the level of consciousness/awareness of the process, whether restraints or drugs were used and the speed with which death occurred. Possible mechanisms of death include smothering, choking and positional/compression asphyxia.

Manual and instrument asphyxiation/strangulation: Examining perpetrator and victim characteristics.

Asphyxiation and strangulation are predominant murder methods, with ligature and hands being common weapons in such attacks. This study examines a broad sample with the goal of establishing statistical significance between manual and instrument asphyxiation/strangulation and both victim and offender characteristics. Two hundred cases of perpetrators who strangled or asphyxiated at least one victim on or after 1970 were randomly selected from the Radford-FGCU Serial Killer Database. Descriptive analysis and association tests were performed for characteristics of the perpetrators, victims and crimes. In 68% of the cases, perpetrators only targeted women. The primary murder motives were sadism (36%) and intense emotions (22%), which were statistically associated with the perpetrators' relationship with their victims, serial killing and motive of asphyxiation. There was a relationship between the perpetrators' favoring the use of manual or ligature strangulation/asphyxiation and their ethnicity, prior history of abuse and the victims' racial/ethnic group. Findings highlight the variety of contexts in which strangulation takes place, ranging from sexually or sadism motivated homicide and intimate partner violence. Moreover, the predominance of manual or ligature asphyxiation/strangulation among different racial/ethnic groups may have implications in legal processes, as well as in risk and threat assessments.

Structural brain morphology in young adult women who have been choked/strangled during sex: A whole-brain surface morphometry study.

INTRODUCTION: Being choked/strangled during partnered sex is an emerging sexual behavior, particularly prevalent among young adult women. Using a multiparameter morphometric imaging approach, we aimed to characterize neuroanatomical differences between young adult women (18-30 years old) who were exposed to frequent sexual choking and their choking naïve controls. METHODS: This cross-sectional study consisted of two groups (choking [≥4 times in the past 30 days] vs. choking-naïve group). Participants who reported being choked four or more times during sex in the past 30 days were enrolled in the choking group, whereas those without were assigned to the choking naïve group. High-resolution anatomical magnetic resonance imaging (MRI) data were analyzed using both volumetric features (cortical thickness) and geometric features (fractal dimensionality, gyrification, sulcal depth). RESULTS: Forty-one participants (choking n = 20; choking-naïve n = 21) contributed to the final analysis. The choking group showed significantly increased cortical thickness across multiple regions (e.g., fusiform, lateral occipital, lingual gyri) compared to the choking-naïve group. Widespread reductions of the gyrification were observed in the choking group as opposed to the choking-naïve group. However, there was no group difference in sulcal depth. The fractal dimensionality showed bi-directional results, where the choking group exhibited increased dimensionality in areas including the postcentral gyrus, insula, and fusiform, whereas decreased dimensionality was observed in the bilateral superior frontal gyrus and pericalcarine cortex. CONCLUSION: These data in cortical morphology suggest that sexual choking events may be associated with neuroanatomical alteration. A longitudinal study with multimodal assessment is needed to better understand the temporal ordering of sexual choking and neurological outcomes.

Effects on oral tissues of asphyxiation caused by cervical compression: The pink teeth phenomenon in Kato's studies (1941).

The effects on oral tissues of asphyxiation caused by cervical compression were investigated in 203 rabbits by Kiyotoshi Kato, who published four papers in classical Japanese in Kokubyo Gakkai Zasshi (now The Journal of the Stomatological Society, Japan) in 1941. The aim of this review is to summarize and disseminate the enormous amount of experimental data (reprint permission in English has been obtained from the journal). Based on the experimental models of hanging, strangulation with an external force equal to body weight, and strangulation with an external force equal to 1/10th body weight, the macroscopic and histological findings of the oral region immediately after death, including the respiratory condition until death and ocular conjunctival petechiae, were obtained and compared with 4 cases of human strangulation. Strangulation after each of four physical conditions (anesthesia, starvation, alcohol intake, and bleeding) was also investigated. Experiments were performed to investigate the effects of tracheal obstruction, cervical vein ligation, common carotid artery ligation, cervical nerve amputation, or combinations thereof. In the discussion focusing solely on tooth discoloration, it was suggested that the presence of pink teeth at a stage when putrefaction has little or no effect might be a finding indicative of death from asphyxiation caused by cervical compression. This review provides detailed data on the condition of oral tissues after asphyxiation caused by cervical compression and is expected to be used not only for elucidating the mechanism of the pink teeth phenomenon but also for conducting other forensic research.

Delayed respiratory distress after thyroidectomy-another challenge for us: a case report.

Background: Delayed airway obstruction and the resulting severe dyspnea with acute distress are rare but life-threatening postoperative thyroidectomy complications. Unfortunately, if not adequately attended to on time, they could cost a patient's life. Case Description: A 47-year-old female patient who underwent thyroidectomy was left at the end of surgery with a tracheostomy, because of tracheomalacia and recurrent laryngeal nerve injury. Within the next ten days, her health condition gradually worsened. She complained of unexpected symptoms of shortness of breath, airway compromize and neck inflammation even with the existing tracheostomy tube. In face of new onset dyspnea, without giving proper attention to the postoperative course of this complicated patient, the consulting otorhinolaryngologist decided to decannulate the patient on the sixth postoperative day. This precipitated the presentation of an extensive neck infection with resultant total bilateral vocal fold immobility, followed by life-threatening airway obstruction, due to an unintentionally forgotten gauze in peritracheal space during thyroidectomy. In critical condition, the patient was successfully intubated with Rapid Sequence Induction, which enabled ventilation, oxygenation and saved the patient's life. After definitively securing the airway, she underwent tracheostomy with tracheal re-cannulation. After a prolonged antimicrobial course and achieving voice rehabilitation, the patient was decannulated. Conclusions: Post thyroidectomy dyspnea is possible even with tracheostomy in place. The decision-making in the management of a thyroidectomy patient is of paramount importance not only intraoperatively, but also in the postoperative period and the gland surgeon expertise is of supreme value for avoiding life-threatening complications. In case of postoperative complaints, the patient should be referred first to the gland surgeon and only thereafter to other medical consultants. Disregarding a variety of factors like patient characteristics, risk factors and comorbidity, available diagnostic tools and specific recovery profile could cost the patient's life.

Heads or tails first? Evolution of fetal orientation in ichthyosaurs, with a scrutiny of the prevailing hypothesis.

According to a longstanding paradigm, aquatic amniotes, including the Mesozoic marine reptile group Ichthyopterygia, give birth tail-first because head-first birth leads to increased asphyxiation risk of the fetus in the aquatic environment. Here, we draw upon published and original evidence to test two hypotheses: (1) Ichthyosaurs inherited viviparity from a terrestrial ancestor. (2) Asphyxiation risk is the main reason aquatic amniotes give birth tail-first. From the fossil evidence, we conclude that head-first birth is more prevalent in Ichthyopterygia than previously recognized and that a preference for tail-first birth likely arose in derived forms. This weakens the support for the terrestrial ancestry of viviparity in Ichthyopterygia. Our survey of extant viviparous amniotes indicates that fetal orientation at birth reflects a broad diversity of factors unrelated to aquatic vs. terrestrial habitat, further undermining the asphyxiation hypothesis. We propose that birth preference is based on parturitional mechanics or carrying efficiency rather than habitat.

Medical line entanglement: The unspoken patient safety hazard of medical devices.

BACKGROUND: In February 2022, the US Food and Drug Administration published a safety communication regarding the risk of strangulation from enteral feeding delivery sets. When it comes to the causes of accidental strangulation or asphyxiation, it is common knowledge that household items, such as window blind cords, are potential hazards. However, many people may not expect that medical devices may pose similar risks because of medical line entanglement (MLE). METHODS: A survey of clinicians from pediatric acute care and outpatient facilities and caregivers of patients with medical lines was conducted with a goal to understand if clinicians and caregivers are aware of MLE, if healthcare facilities have policies and procedures related to the prevention of MLE, and if education about the risks of MLE is provided to caregivers when they first receive a medical device. RESULTS: The survey was shared through clinician organizations and patient advocacy groups. Responses were received from 191 clinicians and 117 caregivers. A majority of clinicians reported awareness of the risk of entanglement; however, few received direction from their employer on managing these risks. Caregivers (N = 106) reported that their child had experienced MLE, however only 9% of those caregivers recalled receiving any education on MLE from their healthcare providers. CONCLUSION: This survey demonstrates the need for healthcare facilities to develop programs for managing risks of MLE and for healthcare teams and caregivers to discuss prevention methods whenever an at-risk patient is sent home with a medical device that poses a risk for entanglement.

Diagnosis of asphyxiation in advanced decomposed corpses by using Oil-Red-O Stain and immunohistochemical technology.

BACKGROUND: The unambiguous diagnosis of asphyxiation is still a major challenge for the forensic pathologist, especially in terms of highly advanced decomposed corps. METHODOLOGY: In order to demonstrate asphyxiation particularly in profoundly putrid bodies we hypothesized that hypoxic stress is basically responsible for generalized fatty degeneration of visceral organs which can be detected by histological examination using a special staining technique referred to as Oil-Red-O Stain (Sudan III-red-B-stain). To test this hypothesis we examined different tissues (myocardium, liver, lung and kidney) of 107 people divided into 5 groups. These are: (i) 71 case-victims who were found in a truck and died most likely due to asphyxiation, whereby any other violent or natural cause of death was ruled out by postmortem examination; (ii) 10 barely decomposed positive-control-victims; (iii) 6 non-decomposed positive-control-victims; iv) 10 drowning non-decomposed positive-control victims, and v) 10 negative-control-victims. Apart from general histological special staining methods, an immunohistochemically approach as a case-control-study on lung tissues of same individuals was carried out by means of using two polyclonal rabbit-antibodies against (i) HIF-1-α (Hypoxia Inducing Factor-1 alpha) and (ii) SP-A (pulmonary surfactant-associated protein A) to detect both the transcription factor and pulmonary surfactants. The positive proof of already either of them gives evidence of death caused by hypoxia. RESULTS: Histological examination of myocardium, liver and kidney of the 71 case-victims and the 10 positive-control-victims using Oil-Red-O Stain showed a fatty degeneration of small droplet type; there was no evidence for fatty degeneration in tissues of the 10 negative-control-victims. These findings strongly indicate a causal association between oxygen deficiency and generalized fatty degeneration of viscera due to insufficient oxygen supply. In terms of methodology, this special staining technique seems to be very informative, even applicable on decomposed corps. Results of immunohistochemistry indicate that on the one hand the detection of HIF-1α is not possible to perform on (advanced) putrid bodies, whereas the verification of SP-A is still feasible on the other. CONCLUSION: Positive Oil-Red-O staining and the immunohistochemical detection of SP-A can serve as a serious hint for the diagnosis of asphyxia on putrid corpses, considering other circumstances of death that have been determined.

Did Jesus Die by Suffocation?: An Appraisal of the Evidence.

A majority of medical and lay articles regarding crucifixion, and specifically the crucifixion of Jesus Christ, now state that suffocation was the primary cause of death from crucifixion. An in-depth analysis reveals that this theory is based on a form of torture unrelated to crucifixion and that no evidence directly linking suffocation to crucifixion has been published. Indeed, a thorough review of available ancient evidence from literature, artwork, graffiti, and modern archeology and re-enactment studies reveals no evidence in favor of suffocation and much evidence against suffocation as the cause of death in typically-portrayed crucifixions, and particularly for the crucifixion of Jesus Christ. Researchers are encouraged to look elsewhere for the most likely cause or causes of death from crucifixion. It may be time to abandon the idea that suffocation was the primary cause of death in crucifixion.

Lower Cranial Dystonia with Inflated Cheeks: A Case of Dystonic Respiratory Failure.

We herein report a 76-year-old woman who developed lower cranial dystonia with a peculiar appearance of cheek inflation. The patient showed strong contraction of the orbicularis oris muscles. Consequently, her cheeks were passively inflated by expiration without exit. When the dystonic attack persisted, she developed cyanosis but recovered immediately after passive mouth opening. An autopsy revealed progressive supranuclear palsy. We tentatively named this characteristic dystonia "lower cranial dystonia with inflated cheeks" because of its peculiar appearance of inflated cheeks. This dystonia can cause respiratory failure. Therefore, neurologists should recognize such dystonia as a movement disorder emergency.

Fatal Choking Due to a Slug: A Death Driven by Folklore.

The use of animals for therapeutic purposes is based on traditional beliefs, family pressure, and watching others appear to be cured. We report an unusual case of a 47-y-old man who choked to death after consuming a live slug. During autopsy, a 9.5-cm slug was found impacted in the tracheobronchial tree. History provided by the family revealed that the deceased consumed slugs in the belief that this would relieve his symptoms of chronic arthritis. We report this rare case to highlight the possible ill effects of such practices.

Mealtime difficulties in adults with mental health conditions: an integrative review.

BACKGROUND: Dysphagia and choking are highly prevalent in adults with mental health conditions. However, there is scant research considering the personal experience of dysphagia for this population. AIMS: To understand the evidence-base for strategies to involve the patient in recognition, assessment and treatment of mealtime difficulties. METHODS: This integrative review synthesised the literature on the experience of dysphagia in patients with mental health conditions. Patient consultation led to co-designed search terms and eligibility criteria for a systematic search of five scientific databases following Prisma guidance. Quality assessment of the eligible studies and reflexive thematic analysis were completed. RESULTS: 31 studies were included for review. These included case reports, literature reviews and cross-sectional studies. Quality of evidence was weak and no intervention studies were identified. There was scant detail regarding the personal experience of dysphagia or choking. Themes identified related to biomedical perspectives, influencing factors presented without context, and decision-making led by clinicians. CONCLUSIONS: Guidance on mental healthcare calls attention to under-diagnosis of physical co-morbidities and advocates patient inclusion. However, the patient voice in this population is rarely described regarding dysphagia. Further inclusive research is indicated to explore the impact of dysphagia and choking, and implications for interventions and outcome measures.

An unusual blunt force trauma pattern and mechanism to the cranial vault: Investigation of an atypical infant homicide.

This case report presents an unusual fracture pattern in the cranium of a four-month-old infant indicative of child abuse. Upon postmortem examination, the infant presented with numerous bilateral linear cranial fractures running perpendicular to the sagittal suture with depressed and curvilinear fractures apparent on the supra-auricular surfaces of the cranium. Histological evidence indicates multiple traumatic events to the cranium. In addition, the stair-step pattern of a parietal fracture may represent multiple contiguous fractures from repeated loading of the head at different times with variation of the focal points of compressive force. Additionally, the left humerus, left radius, and left ulna have healing metaphyseal fractures, and the left ulna also has an antemortem diaphyseal fracture which resulted in the distal metaphysis being rotated 45 degrees medially. Integration of autopsy, anthropological, and neuropathological reports for this case suggest multiple inflicted injury episodes with a repeated atypical mechanism(s) to the cranial vault of the infant. During investigative interviews, the caretaker admitted to squeezing the infant's head and neck on multiple occasions to quiet the child. This reported abusive mechanism is consistent with the pattern of symmetric cranial fractures and soft tissue injuries indicating asphyxiation. This case report provides forensic investigators with a potential trauma mechanism to explore in cases when a similar pattern of cranial trauma is observed and highlights the need for greater research on fracture propagation and fracture healing in the infant cranium.

Association of Frequent Sexual Choking/Strangulation With Neurophysiological Responses: A Pilot Resting-State fMRI Study.

Being choked or strangled during partnered sex is an emerging sexual behavior, prevalent among young adult women. The goal of this study was to test whether, and to what extent, frequently being choked or strangled during sex is associated with cortical surface functioning and functional connectivity. This case-control study consisted of two groups (choking vs. choking-naïve). Women who were choked 4 or more times during sex in the past 30 days were enrolled into the choking group, whereas those without were assigned to the choking-naïve group. We collected structural and resting-state functional magnetic resonance imaging (fMRI) data and analyzed the data for amplitude of low-frequency fluctuation (ALFF) and regional homogeneity (ReHo) using cortical surface-based resting-state fMRI analysis, followed by static and dynamic resting-state fMRI connectivity analysis. Forty-one participants (choking n = 20; choking-n-aïve n = 21) contributed to the analysis. An inter-hemispheric imbalance in neuronal activation pattern was observed in the choking group. Specifically, we observed significantly lower ALFF and ReHo in the left cortical regions (e.g., angular gyrus, orbitofrontal gyrus) and higher ALFF and ReHo in the right cortical regions (e.g., pre-central/post-central gyri) in the choking group compared with the choking-naïve group. A significant group difference was found in static functional connectivity between the bilateral angular gyrus and the whole brain, in which the choking group's angular gyrus showed hyperconnectivity with, for example, the post-central gyrus, pre-central gyrus, and Rolandic operculum, relative to the choking-naïve group. The dynamic analysis revealed hyperconnectivity between the left angular gyrus and the bilateral postcentral gyrus in the choking group compared with the choking-naïve group. Taken together, our data show that multiple experiences of sexual choking/strangulation are associated with an inter-hemispheric imbalance in neural activation pattern and hyperconnectivity between the angular gyrus and brain regions related to motor control, consciousness, and emotion. A longitudinal study using multi-modal neurological assessments is needed to clarify the acute and chronic consequences of sexual choking/strangulation.

#ChokeMeDaddy: A Content Analysis of Memes Related to Choking/Strangulation During Sex.

Recent research indicates that some young people initially learn about sexual choking through Internet memes. Thus, a qualitative content analysis was performed on 316 visual and textual memes collected from various social media websites and online searches to assess salient categories related to choking during sex. We identified nine main categories: communication, gendered dynamics, choking as dangerous, choking as sexy, sexualization of the nonsexual, shame and worry, romance/rough sex juxtaposition, choking and religious references, instructional/informational. Given that memes, through their humor, can make difficult topics more palatable and minimize potential harm in the phenomenon they depict, more concerted, synergistic effort that integrates media literacy into sexuality education programming on the potential risks that may ensue for those engaging in sexual choking is warranted.

Self-ligature strangulation by multiple cable ties.

This article reports an autopsy of a 39-year-old deceased male who had done suicidal strangulation using multiple self-locking cable ties. The deceased used seven ligatures, constricting at a different level around the neck to accomplish the suicidal strangulation. Each ligature was made up of two cable ties attached to each other. The detailed autopsy examination and crime scene investigation confirm the manner of strangulation as suicidal. Suicidal strangulation is uncommon but not rare. Varying ligature materials and different locking methods were used for this purpose. The present case is remarkable because of the use of multiple self-locking zip cable ties as ligature material.

Two fatal cases due to inadvertent discharge of carbon dioxide fire suppressant: Intoxication or asphyxiation?

Carbon dioxide (CO2) is widely used for fire protection and is lethal when inhaled at the minimum design concentration. Two workers were performing periodic maintenance of isolated stored CO2 cylinders of a fire extinguishing system, and during the maintenance, CO2 was accidently discharged into the storage room. The workers were found unconscious beside the cylinders and were confirmed dead in the hospital soon after. Arterial blood gas analysis revealed severe acute hypercapnia accompanied by respiratory acidosis. Combined with the scene investigation and autopsy findings, the cause of their death was determined to be CO2 intoxication and possible involvement of asphyxiation. Considering the repeated occurrences of unfortunate deaths involving CO2 fire extinguishing systems, this report will be useful for forensic pathologists when dealing with similar cases.

Approach considerations for the management of strangulation in the emergency department.

Patients with a history of strangulation present to the emergency department with a variety of different circumstances and injury patterns. We review the terminology, pathophysiology, evaluation, management, and special considerations for strangulation injuries, including an overview of forensic considerations and legal framework for strangulation events.