A study of fatal falls from height

A Retrospective Study on the Outcomes of Injuries From Border Wall Falls

Objective Our retrospective cohort study focuses on the outcomes of injuries sustained from falls from the USA-Mexico border wall. The purpose of this study is to understand and predict the types of injuries that will be present in patients who fall from the border wall. This can further help trauma response teams to better predict and prepare for the care of these patients.  Methods  This retrospective cohort study included all patients that were admitted to Desert Regional Medical Center, a trauma I center, after a fall from the border wall that ranged from heights of 15 to 30 feet. The admissions occurred between March 2016 to December 2021.  Results  Of the 108 patients included, 38.2% (78) sustained at least one lower extremity injury, of which the most common was injury to the calcaneus bone. Additionally, there were several concomitant injuries, of which the combination of lower extremity and lumbar injury was found to be the most common (11.2%). The injury severity score (ISS) was found to not be statistically significant (ɑ=0.05) between groups of patients whose length of stay (LOS) in the hospital was greater than 10 days and less than 10 days. There was 1% fatality (1 of 108) and 92.5% required surgical intervention (100 of 108).  Conclusions Patients injured from border wall falls are more likely to sustain lower extremity injuries than injuries to other parts of the body. Additionally, patients with lower extremity injuries sustained lumbar spinal injuries concomitantly, which can be most likely attributed to the axial compression of the spine during these falls. Most of these injuries required surgery and hospital admissions to treat. Understanding the patterns of injury from border wall falls can further help trauma response teams treat patients with efficient management.

Biomechanical study on the effect of atherosclerosis on the vulnerability of thoracic aorta, and it's role in the development of traumatic aorta injury

Traumatic aorta injury (TAI) is the second most common traumatic cause of death preceded only by head injuries, being responsible for 5% to 30% of all mortalities in high-speed deceleration injuries. Multiple external factors might play a role such as impact speed, impact direction, occupant location, and presence or lack of restraining safety mechanism. Apart from these external factors, also human biological factors can influence its development. Based on the data of scientific literature, age clearly plays a role in suffering TAI, but the role of atherosclerosis-as a disease affecting the structure of the aorta-is unknown. Biomechanical properties of tissue samples of 104 aorta specimens removed during the autopsy from the posterior (Group 'A') and lateral wall (Group 'B') of descending aorta were analyzed. Specimens were examined by a Zwick/Roell Z5.0 biaxial tester. The Young's modulus (E (MPa)) was calculated using a linear regression procedure where the base of the elongation was the parallel length of the sample, the achieved maximal force (Fmax (N)), the elongation at the time of Fmax (Lmax (mm)), the force at the beginning of rupture (Fbreak (N)), the elongation at the time of Fbreak (Lbreak (mm)) were registered. Specimens were categorized based on macroscopic and microscopic appearance. In the posterior (A) samples the difference between Lbreak (p<0.001) and Lmax (p<0.001) was significant between the macroscopic group. Lbreak (p = 0.009) and Lmax (p = 0.003) showed similar pattern in the lateral (B) samples. Comparing the histological groups by the measured parameters (Fmax, Lmax, Fbreak, Lbreak) showed a significant difference in the means (p<0.001, p = 0.003, p<0.001 respectively). The study demonstrated that atherosclerosis decreases the resistance of the aorta. The rupture occurs at lower force (Fmax and Fbreak), and at shorter elongation (Lmax and Lbreak) in case of the presence of atherosclerosis. This effect is most substantial if calcification is present: the resistance of aorta affected by calcification is only two-thirds on average compared to aorta affected by the early phase of atherosclerosis. This phenomenon can be clearly explained by the weakening structure of the tunica intima.

A comparative study of the injury pattern between suicidal and accidental falls from height in Northern Tunisia

BACKGROUND

Falls from height are a common cause of marbidity and mortality. The aim of this study is to examine the characteristics of the victims, the circumstances of the fall and distribution of the injuries of accidental and suicidal falls from height.

MATERIALS AND METHODS

It was a retrospective cross-sectional study, based on autopsies performed over 16 years (January 2005 to December 2020). The recorded variables included demographic data of the victim, height of fall, death scene findings, length of hospital stay, autopsy findings, and toxicological results.

RESULTS

Of the 753 victims of fall from height, 607 were fallers and 146 were jumpers. We found that male victims were predominant in the accidental group (86.8% vs. 69.2%). The mean age at death was 43.6 ± 17.9 years. Suicidal falls occurred in a private house in the majority of cases (70.5%), while accidental falls occurred most frequently at workplace (43.8%). Suicidal falls were higher than accidental falls (10.4 ± 7.3 m vs. 7.1 ± 5.7 m). Injuries in the thorax, abdomen, pelvis, upper and lower extremities were more frequentl in the suicidal falls group. Pelvic fractures were 2.1 times more likely to occur in the suicidal falls. Head injuries were more frequent in the accidental falls group. The survival delay was shorter in the suicidal falls group.

CONCLUSIONS

our study highlights the differences in the profile of the victims and in the pattern of injuries caused by falls from height, depending on the victim's intention to fall.

A 13-Year Study of Fatal Falls From Height in Northern Tunisia

INTRODUCTION

Falls from height are a major cause of unintentional injury death, resulting in high disability and mortality. We investigated the characteristics of fatal falls and their relationship with intentionality, injury patterns, and death on impact.

MATERIALS AND METHODS

In this retrospective study, we examined 545 cases of fatal falls from height that underwent autopsy in the forensic department of the Charles Nicolle hospital of Tunis (Tunisia) between January 2008 and December 2020. Cases were reviewed in terms of demographics, fall characteristics, and autopsy findings.

RESULTS

The population was predominately male (86.6%). Four hundred twenty-one (77.3%) originated from accidents, 120 (22%) were found to be suicidal, with 4 homicide cases. A notable decline in cases was noticed following the Jasmine revolution, 2011 (R squared = 0.8). The mean height of falls was 8 m. Higher falls were associated with a set of organ-specific injuries. Organ injury pattern did not differ based on intentionality. Female victims were 2.4 times more likely to sustain pelvic injuries than males. The majority of victims deceased before reaching health care structures. Death on impact was strongly associated with higher falls, cranial impact, and organ-specific injuries, including cardiac, pulmonary, and skull injuries.Falls from height are in many cases preventable. A clearly defined fall safety policy, strict implementation of evidence-based interventions, efficient allocation of resources, and raising safety awareness must to be urgently implemented.

CONCLUSION

Understanding patterns of injury and the factors that influence death on impact may be of further interest in the prevention and management of survivors in the acute period.

A comparative autopsy study of the injury distribution and severity between suicidal and accidental high falls

Falls are the second cause of accidental deaths worldwide. Falls from height are also a common method of suicide. The aim of this study is to compare the characteristics of the victims, the circumstances of the fall and the severity and distribution of the injuries reported in an autopsy case series of falls from height. This study is a retrospective analysis of consecutive autopsy cases of suicidal and accidental falls from height which were investigated in the Department of Forensic Medicine and Toxicology of the National and Kapodistrian University of Athens during the period 2011-2019. The recorded variables included demographic data of the victim, height of fall, length of hospital stay, toxicological results, the existence and location of injuries and Injury Severity Score (ISS). Victims of suicidal falls were younger (55.53 vs. 62.98, p = 0.001), they fell from higher heights (12.35 vs. 5.18 m, p < 0.001), and they sustained more severe injuries compared with victims of accidental falls (ISS 51.01 vs. 40.88, p < 0.001). Injuries in the thorax, abdomen, pelvis, upper and lower extremities were more frequently observed after a suicidal fall (93.6% vs. 67.3%, 72.1% vs. 21.4%, 72.1% vs. 27.6%, 42.9% vs. 15.3%, 45.7% vs. 13.3%, respectively-p < 0.001), probably due to the higher height of fall. Our study outlines the differences in the profile of the victims and in the severity of injuries caused by falls from height depending on the intention of the victim to fall. However, a distinctive injury pattern in victims of suicidal falls was not demonstrated.

Studies of Acceleration of the Human Body during Overturning and Falling from a Height Protected by a Self-Locking Device

The use of individual fall protection equipment is one of the most commonly applied methods of protecting workers whose worksites are located above the floor level. The safety of the user in such a situation depends on both the proper selection and correct use of such equipment. Additionally, aspects such as minimizing the free-fall distance before the fall arrest, as well as quick notification of an accident and efficient rescue operation, are important factors influencing safety. This paper presents a new testing method for fall arrest equipment using a test stand consisting of the Hybrid III 50th Pedestrian ATD anthropomorphic manikin and measuring set with three-axis acceleration transducers. The proposed method and test stand were developed for the design and testing of new fall protection devices equipped with electronic detection and alarm systems, for which it is necessary to determine acceleration limits in order to determine the alarm threshold. The proposed method is based on the measurement of accelerations that occur during tipping and falling from the height of an anthropomorphic manikin secured by a self-locking device. Two places of attachment of the measuring set with a three-axis acceleration sensor were analyzed at the waist belt of the manikin (abdomen and back). Moreover, the self-locking device lanyard was attached to the two points of the safety harnesses (the front and back point). The aim of the research was to check whether the acceleration values depend on the places of attachment of the measuring and anchored system, as well as to determine their maximum values. Acceleration values corresponding to fall arrest and tipping were analyzed. Limits of acceleration have been established in order to determine the threshold of alarm triggering. The non-parametric Mann-Whitney U test was used to check whether the location of the three-axis acceleration transducer and the position of the self-locking device lanyard attachment affect the value of the recorded acceleration. For results of acceleration measurements when testing the behavior of the manikin during fall arrest, no statistically significant differences were found. For results of acceleration measurements when testing the tipping behavior of the manikin, statistically significant differences occurred. This means that during fall arrest, the location of the three-axis acceleration transducer and the position of the self-locking device lanyard attachment do not matter. This work is a continuation of previous research on accelerations characterizing human body positions occurring during normal physical activities (ADL-activities of daily living).

Links between alcohol and external causes of deaths in males: an autopsy study

OBJECTIVES

This study aimed to analyse deaths due to external causes in males in northwest Slovakia.

STUDY DESIGN

This was a cross-sectional autopsy study.

METHODS

The autopsy registry provided information on fatalities in males in northwest Slovakia due to external causes in 2015. Data were analysed by age, cause of death and blood alcohol concentration (BAC), and the contribution to overall mortality was calculated.

RESULTS

From a total of 305 fatalities, the dominant cause of death was unintentional (other than traffic; 56.7%), followed by intentional (26.6%) and traffic (16.7%). A BAC of ≥0.5 g/kg was found in 43.9% of deaths. Lower levels of BACs (0.5-1.9 g/kg) were observed in relatively high proportions among the younger (aged ≤34 years) and older (aged ≥65 years) males (17.9% and 14.0%, respectively), as well as in the traffic and intentional injury cause of death categories (23.5% and 19.8%, respectively). Male deaths due to external causes had a 6.2% contribution to overall mortality in northwest Slovakia.

CONCLUSIONS

Alcohol intoxication frequently co-occurs with fatalities from external causes, including at lower BACs, indicating the harmful role of alcohol at all concentrations.

Fall from heights: possible factors influencing the onset of complications

PURPOSE

Fall from a height is high energy trauma. The causes include both accidental falls and suicide attempts. The literature and also our previous study demonstrated that this kind of patients, during their recovery time, need a high multidisciplinary workload with significant costs. The present study is the first researching the patterns of the non-acute orthopedic complications after a trauma precipitation that required a new hospitalization and surgical procedure.

METHODS

Retrospective study and analysis of orthopedic complication characteristics of patients fallen from height. We researched the possible relation between the complication pattern (soft tissue or bone involvement) and the case character (psychiatric or non-psychiatric patients, type of fracture and kind of fixation).

RESULTS

The 18.83% of all patients (154 cases included) needed a new admission to perform further surgical procedures (9.74% of psychiatric patients and 9.09% of unvoluntary victims). Our data showed that patients with psychiatric disorder were associated with a statistically significant (p < 0.05) increase in soft tissue complications (46.67%) and onset of non-union after internal osteosynthesis and external fixation (72.72%), respectively.

CONCLUSION

According to the results obtained, we can conclude that osteosynthesis in psychiatric patients is related to well-defined and predictable complications.

Relationship of injuries detected in fatal falls with sex, body mass index, and fall height: An autopsy study

Falls from height are the most common cause of blunt trauma after traffic accidents. The focus of this retrospective study was to analyze the relationship between injuries in fatal falls and fall height, body mass index (BMI), and sex in 206 autopsy reports. Age, sex, weight, height, place of the fall, fall height, period between the incidence and death, external examination findings in the autopsy, intracranial findings, fractures, internal organ injuries, and information about the causes of death were recorded. Accidents and men were the largest groups. Injuries to the upper and lower extremities were frequently detected in accidents. Lower extremity injuries were more common in women. The occurrence of head and neck injuries were rare in overweight individuals. When evaluated by manner of death, there were differences in extremities and posterior body injuries. There was no difference between sex in terms of autopsy findings. It was observed that the injuries increased as the height increased. There was a statistical difference between the BMI groups in terms of liver, rib and sternum injuries. The most common cause of death was head injuries. Many factors have been known to affect injury patterns in cases of falls from height. Fall height, BMI, and gender are just a few of these factors. This study will be beneficial to support the findings of this study with larger-scale studies and statistical modeling that consider more factors affecting injuries in cases of falls.

Characteristic analysis and fuzzy simulation of falls-from-height mechanics, and case studies

In this paper, methods for scientifically inferring the causes of the falls-from-height accidents, that is, the initial fall postures, and reconstructing the fall accident are presented. For this purpose, the general types of fall were subdivided into eight, and the characteristics of each fall type were analyzed. An initial posture estimation tool based on Fuzzy method was developed utilizing the massive amount of quantitative database that was constructed by repeating the simulation program for all types of falls. In addition, the initial conditions for each type were standardized with the experimental results and simulation data to reconstruct the fall behavior using the estimated fall accident type. The results of four carefully selected case studies were presented to verify the reliability and practicality of the developed fall analysis program and the reconstruction method.