Does obesity affect the position of seat belt loading in occupants involved in real-world motor vehicle collisions?

Hartka, Thomas; Carr, Hannah M.; Smith, Brittany R.; Melmer, Monica; Sochor, Mark

doi:10.1080/15389588.2017.1381337

Cited by 14 publications

(7 citation statements)

References 21 publications

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“…The reason for the difference between our results and Hartka et al 25 may be the difference in posture when measuring the X-value and Z-value. Their CT study would have been measured in the supine position, but our study used a coordinate system in the sitting position.…”

Section: Discussioncontrasting

confidence: 99%

“…About SBS location, Hartka et al measured the position of the SBS in actual car accident patients on CT, and reported that the X-value was greater in obese people while the Z-value did not change much 25 . In contrast, at the laboratory level, Reed et al measured the lap belt position, and reported that a 10 kg/cm 2 increase in BMI resulted in a 43 mm anterior and 21 mm superior position 26 .…”

Section: Discussionmentioning

confidence: 99%

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A radiographic and physical analysis of factors affecting seat belt position in sitting car seat

Yamagata

Nishida

Izumiyama

et al. 2022

Sci Rep

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The characteristic subcutaneous hemorrhage along the seat belt in motor vehicle accidents is called the seat belt sign (SBS). The risk of organ injuries is especially high when abdominal SBS is located above the anterior superior iliac spine (ASIS). The purpose of this study analyzed the physical and radiographic factors of healthy volunteers sit on car seat that affect initial position of abdominal seat belt, namely “lap belt”, related to the seat belt injury. This study was examined prospectively relation between physical characteristics of one hundred healthy volunteers and lap belt position sitting the car seat. Physical findings were clarified age, sex, height, body mass index (BMI), and waist circumference. Radiographical findings were measured lumber lordosis (LL), sacral slope (SS), and initial lap belt position by marking with lead tape for the center and ASIS of the lap belt installed on the driver’s car seat. In the lateral X-ray image, we measured the horizontal distance (X-value) and vertical distance (Z-value) from the ASIS to the central marker. The lap belt angle was determined to measure the angle between the horizontal line and the straight line connecting the upper edges of the markers. Statistical analysis of the relationships between physical characteristics and radiological findings was performed. X-value and Z-value were positively correlated with body weight, BMI, and waist circumference, while the lap belt angle was negatively correlated with body weight, BMI, and waist circumference. The relationship between physical characteristics and the initial position of seat belt was analyzed. Since the lap belt is positioned higher than the ASIS in occupants with a high BMI, it is likely to cause seat belt injury. This analysis can help to develop safer seat belts and to enlighten car occupants.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A radiographic and physical analysis of factors affecting seat belt position in sitting car seat

Yamagata

Nishida

Izumiyama

et al. 2022

Sci Rep

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“…13 The extended webbing length combined with greater body mass increases the counteractive restraint force applied to the occupant which could contribute to the increased incidence of seat belt markings. 13–15…”

Section: Discussionmentioning

confidence: 99%

Seat belt injuries and external markings at autopsy in cases of lethal vehicle crashes

et al. 2022

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A study was undertaken to determine what injuries are associated with the wearing of seat belts and if the presence of cutaneous seat belt markings observed on victims of lethal vehicle crashes increased the likelihood of underlying injury. Autopsy reports from the files at Forensic Science South Australia were reviewed for all fatal motor vehicle crashes from January 2014 to December 2018. A total of 173 cases were included for analysis with 127 occupants wearing seat belts at the time of impact (73.4%) (age range = 18–93; mean = 45 M:F = 81:46). Of these, only 38 had external seat belt markings (29.9%) (age range = 19–83; mean = 49 M:F = 20:18). Logistic regression modelling showed that occupants who were wearing seat belts were more likely to experience closed head injury without skull fractures in addition to mesenteric and gastrointestinal injury. Increasing body mass index increased the incidence of seat belt markings ( p < 0.01) and markings were more likely to be found in the presence of bilateral pelvic fractures. Thus, external seat belt markings were observed in only a minority of seatbelt wearers, and more often in individuals with higher BMIs and with bilateral pelvic fractures (possibly associated with greater momentum and impact force).

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“…A static measurement of belt fit was conducted in literature. 3,4,8,9 Particularly, how the lap belt position is altered by obesity was investigated. Obesity moved the initial lap belt position further anterior-superior to the ASIS.…”

Section: Introductionmentioning

confidence: 99%

“…Obesity introduces slack between the seatbelt and the underlying bony structure, because of a thicker layer of subcutaneous adipose tissue, which reduces seatbelt functionality. A static measurement of belt fit was conducted in literature 3,4,8,9 . Particularly, how the lap belt position is altered by obesity was investigated.…”

Section: Introductionmentioning

confidence: 99%

A numerical study on the safety belt‐to‐pelvis interaction

Naseri

Iraeus

Johansson

2022

Numer Methods Biomed Eng

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The slide of the lap belt over the iliac crest of the pelvis during vehicle frontal crashes can substantially increase the risk of some occupant injuries. A multitude of factors, related to occupants or the design of belt, are associated with this phenomenon. This study investigates safety belt-to-pelvis interaction and identifies the most influential parameters. It also explores how initial lap belt

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Does obesity affect the position of seat belt loading in occupants involved in real-world motor vehicle collisions?

Cited by 14 publications

References 21 publications

A radiographic and physical analysis of factors affecting seat belt position in sitting car seat

A radiographic and physical analysis of factors affecting seat belt position in sitting car seat

Seat belt injuries and external markings at autopsy in cases of lethal vehicle crashes

A numerical study on the safety belt‐to‐pelvis interaction

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