![]() ![]() reported a higher risk of seatbelt injury, especially if the abdominal SBS was located above the anterior superior iliac spine (ASIS) 8. Doersch and Dozier named the characteristic subcutaneous hemorrhagic spots on the chest and abdomen that correspond to the shape of the seat belt in traffic accidents the seat belt sign (SBS) 7. first reported a seatbelt injury, calling it “the seatbelt syndrome” 6. Seatbelts have helped to significantly reduce occupant mortality 2, 3, but as seatbelts have become more commonplace, injuries caused by seatbelts during traffic accidents have increased 4, 5. Since the prototype of the current three-point seat belt in 1959, its use has spread throughout the world. were adopted for automobiles and adapted improved for safety in the event of a traffic accident. After that, the seat belts used in aircraft etc. According to the Metropolitan Life Insurance Company Statistical Bulletin in 1922, the number of automobile fatalities in 50 cities in the United States was 3637 (149.7 per 1 million population) in 19 (155.1 per 1 million population) in 1921, and it was reported that traffic accidents as a cause of death had come to the fore 1. In the early 1900s, as motorization in the United States led to automobile use becoming widespread among the public, the number of traffic accidents increased dramatically. This analysis can help to develop safer seat belts and to enlighten car occupants. Since the lap belt is positioned higher than the ASIS in occupants with a high BMI, it is likely to cause seat belt injury. The relationship between physical characteristics and the initial position of seat belt was analyzed. 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. Statistical analysis of the relationships between physical characteristics and radiological findings was performed. ![]() 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. 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. 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. Physical findings were clarified age, sex, height, body mass index (BMI), and waist circumference. This study was examined prospectively relation between physical characteristics of one hundred healthy volunteers and lap belt position sitting the car seat. 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. The risk of organ injuries is especially high when abdominal SBS is located above the anterior superior iliac spine (ASIS). SBS is associated with underlying regional injuries in nearly half of patients with a higher prevalence of HVI and solid organ trauma.The characteristic subcutaneous hemorrhage along the seat belt in motor vehicle accidents is called the seat belt sign (SBS). Children had 2.8-fold higher rates of HVI (18 vs 9%, P < 0.05). Compared with patients without SBS, patients had a higher incidence of hollow viscous injuries (HVI) and solid organ trauma (8 and 17% vs 1 and 3%, P < 0.05) splenic trauma was 24-fold higher (9.7 vs 0.4%), liver injuries 3.1-fold higher (6 vs 3%), and rib fractures 2.4-fold higher (P < 0.05). Thoraco-abdominal injuries were present in 47 per cent (34 of 72) of patients with SBS. Patients with SBS had lower mortality rates than patients without SBS (1.4 vs 3.7%). Restrained patients were less severely injured with lower injury severity scores (7.62 vs 11.33) and mortality (1.1 vs 5.7%). SBS was seen in 11.3 per cent of patients injured in MVCs and 20.5 per cent of patients with known restraint use. Investigators at a Level 1 trauma center analyzed the incidence, clinical implications, and spectrum of regional injuries in patients injured in MVC over 2 years. Patients with the seat belt sign (SBS) from motor vehicle crashes (MVCs) are prone to specific regional injury patterns. ![]()
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