Average thickness of the bones of the human neurocranium: development of reference measurements to assist with blunt force trauma interpretations.

The accurate interpretation of a blunt force head injury relies on an understanding of the case circumstances (extrinsic variables) and anatomical details of the individual (intrinsic variables). Whilst it is often possible to account for many of these variables, the intrinsic variable of neurocranial thickness is difficult to account for as data for what constitutes 'normal' thickness is limited. The aim of this study was to investigate the effects of age, sex and ancestry on neurocranial thickness, and develop reference ranges for average neurocranial thickness in the context of those biological variables. Thickness (mm) was measured at 20 points across the frontal, left and right parietals, left and right temporals and occipital bones. Measurements were taken from post-mortem computed tomography scans of 604 individuals. Inferential statistics assessed how age, sex and ancestry affected thickness and descriptive statistics established thickness means. Mean thickness ranged from 2.11 mm (temporal squama) to 19.19 mm (petrous portion). Significant differences were noted in thickness of the frontal and temporal bones when age was considered, all bones when sex was considered and the, right parietal, left and right temporal and occipital bones when ancestry was considered. Furthermore, significant interactions in thickness were seen between age and sex in the frontal bone, ancestry and age in the temporal bone, ancestry and sex in the temporal bone, and age, sex and ancestry in the occipital bone. Given the assorted influence of the biological variables, reference measurement ranges for average thickness incorporated these variables. Such reference measurements allow forensic practitioners to identify when a neurocranial bone is of normal, or abnormal, thickness.

Mortuary operations following mass fatality natural disasters: a review.

This is a critical review to discuss the best practice approaches to mortuary operations in preparation for and the response to natural, mass fatality, disaster events, as identified by a review of published articles. The Preferred Reporting Items for Systematic Reviews and Meta-Analysis Protocols (PRISMA-P) Statement guided the identification of potential articles to use in this critical review. Subsequent searches were also conducted to identify articles relating to heat wave, and flood mortality. All identified peer-reviewed studies published in English which discussed the preparation and response of mortuaries to mass fatality natural disasters occurring in developed countries were included. Using the PRISMA-P method of identifying articles, 18 articles were selected for inclusion in this review. Although there are numerous articles which describe the mortuary response to mass fatality incidents, few articles analyzed the response, or discussed the roles which supported and enabled the organization to undertake the task of identifying disaster victims. It is thus difficult to determine objectively if the actions and activities outlined in the articles represent best-practice.

Forensic aspects of the 2009 Victorian Bushfires Disaster.

The 2009 Victorian Bushfires Disaster started on a record hot day in February 2009 and resulted in over 300 separate fires with a death toll of 173 and over 400 presentations to hospital emergency departments. This occurred a little over a week after a heat wave in which over 400 people were thought to have died prematurely in southeastern Australia. The Victorian Institute of Forensic Medicine in collaboration with the police force and the State Coroner's Office and over 100 colleagues from all over Australia, Indonesia, New Zealand and Japan implemented a DVI process based on Interpol guidelines to identify the deceased persons. CT scanning was conducted on all remains collected and played a pivotal role in the identification processes in conjunction with experts in pathology, anthropology, forensic odontology and molecular biology. This paper outlines the scale of the disaster and the work, from a forensic medical perspective, to identify the deceased.

Impact of coronial investigations on manner and cause of death determinations in Australia, 2000-2007.

OBJECTIVE: To evaluate the changes in the understanding of the manner and cause of death occurring during the course of coronial investigations. DESIGN: Retrospective analysis of deaths reported to coroners in Australia between 1 July 2000 and 31 December 2007, using the National Coroners Information System. MAIN OUTCOME MEASURES: (i) Manner of death (natural, external, unknown); (ii) intent classification (eg, unintentional injury, suicide, assault) among deaths with external causes; and, (iii) changes in the manner of death and intent classification between the presumption made at case notification and the coroner's final determination. RESULTS: The coronial investigation changed the presumption about manner of death or intent classification in 5.2% (6222/120 452) of cases in which a presumption was made. Among deaths with a change in attribution from natural causes to external causes, unintentional falls (442/1891) and pharmaceutical poisoning (427/1891) each accounted for 23%. Among deaths with attribution changing from external causes to natural causes, the leading medical causes of death were cardiovascular compromise (551/842; 65%) and infection (124/842; 15%). Of deaths understood correctly at notification to be due to external causes, but the wrong external cause, 34% (206/600) were ultimately judged to be unintentional injuries, and 22% (133/600) were judged to be suicides. CONCLUSIONS: Coronial investigations transform basic understanding of cause of death in only a small minority of cases. However, the benefits to families and society of accurate cause-of-death determinations in these difficult cases may be considerable.

Victoria's trauma care system: national implications for quality improvement.

Progressive reduction in trauma mortality and morbidity demands both peer-group and state registry evaluations, with ensuing recommendations implemented by a responsive state government trauma committee.

Management deficiencies and death preventability of road traffic fatalities before and after a new trauma care system in Victoria, Australia.

BACKGROUND: The Consultative Committee's findings that preventable or potentially preventable (P/PP) death rates (survival prospects > or =25%) of road crash fatalities who received treatment were unaltered between 1992 and 1998 led to a Ministerial Taskforce on Trauma and the gradual introduction of a new Victorian trauma care system. The present study compares outcomes before (1997-1998) and after (2002-2004) the new system. METHODS: The emergency and clinical management and death preventability of 245 consecutive fatalities in the 'before' period and 193 in the 'after' period was assessed by the committee's multidisciplinary panels using the complete hospital, ambulance, and autopsy findings. RESULTS: Emergency department admissions to expanded Major Trauma Services (MTS) increased from 34% to 62% (p < 0.05). More patients were attended by Advanced Trauma Life Support paramedics (p < 0.05) and scene times increased (p < 0.05). Patients admitted within 1 hour decreased from 70% to 45% (p < 0.05). The mean number of deficiencies per patient including those contributing to death was decreased (p < 0.05). The combined P/PP death rates decreased from 36% to 28% (22% relative risk reduction). The P/PP death rates for MTS, Metropolitan Trauma Services, Rural Trauma Services, and Urgent Care Centers for 2002 to 2004 were 25%, 33%, 50%, and 83%, respectively, and did not differ significantly from those of 1997 to 1998 (23%, 49%, 36%, 75%, respectively). The P/PP death rates in MTS were less than those of the other hospital groups. CONCLUSIONS: The new Victorian trauma care system has resulted in a significant decrease in deficiencies including those contributing to death and a decrease in P/PP deaths rates. The improvement has been largely consequent to a marked increase in admissions to MTS.

Missing persons-missing data: the need to collect antemortem dental records of missing persons.

The subject of missing persons is of great concern to the community with numerous associated emotional, financial, and health costs. This paper examines the forensic medical issues raised by the delayed identification of individuals classified as "missing" and highlights the importance of including dental data in the investigation of missing persons. Focusing on Australia, the current approaches employed in missing persons investigations are outlined. Of particular significance is the fact that each of the eight Australian states and territories has its own Missing Persons Unit that operates within distinct state and territory legislation. Consequently, there is a lack of uniformity within Australia about the legal and procedural framework within which investigations of missing persons are conducted, and the interaction of that framework with coronial law procedures. One of the main investigative problems in missing persons investigations is the lack of forensic medical, particularly, odontological input. Forensic odontology has been employed in numerous cases in Australia where identity is unknown or uncertain because of remains being skeletonized, incinerated, or partly burnt. The routine employment of the forensic odontologist to assist in missing person inquiries, has however, been ignored. The failure to routinely employ forensic odontology in missing persons inquiries has resulted in numerous delays in identification. Three Australian cases are presented where the investigation of individuals whose identity was uncertain or unknown was prolonged due to the failure to utilize the appropriate (and available) dental resources. In light of the outcomes of these cases, we suggest that a national missing persons dental records database be established for future missing persons investigations. Such a database could be easily managed between a coronial system and a forensic medical institute. In Australia, a national missing persons dental records database could be incorporated into the National Coroners Information System (NCIS) managed, on behalf of Australia's Coroners, by the Victorian Institute of Forensic Medicine. The existence of the NCIS would ensure operational collaboration in the implementation of the system and cost savings to Australian policing agencies involved in missing person inquiries. The implementation of such a database would facilitate timely and efficient reconciliation of clinical and postmortem dental records and have subsequent social and financial benefits.

Evaluation of the prehospital management of road traffic fatalities in Victoria, Australia.

INTRODUCTION: This study was undertaken to identify prehospital system and management deficiencies and preventable deaths between 01 January 1997 and 31 December 1998 in 243 consecutive Victorian road crash victims with fatal outcomes. METHODS: The complete prehospital and hospital records, the deposition to the coroner, and autopsy findings were evaluated by computer analysis and peer group review with multidisciplinary discussion. RESULTS: One-hundred eighty-seven (77%) patients had prehospital errors or inadequacies, of which 135 (67%) contributed to death. Three-hundred ninety-four (67%) related to management and 130 (22%) to system deficiencies. Technique errors, diagnosis delays, and errors relatively were infrequent. One of 24 deaths at the crash scene or en route to hospital was considered to be preventable and two potentially preventable. CONCLUSION: The high prevalence of prehospital deficiencies has been addressed by a Ministerial Task Force on Trauma and Emergency Services and followed by the introduction of a new trauma care system in Victoria.