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Biomechanics of the Patient Compartment of Ambulance Vehicles under Crash Conditions: Testing Countermeasures to Mitigate Injury
Technical Paper
2001-01-1173
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
ABSTRACT
There has been very limited research on the biomechanics of occupant safety in the ambulance environment. Occupant protection or crash testing safety standards for these unique vehicles are lacking in the United States. Recent studies have identified ambulances as high risk passenger transport vehicles. This study was conducted to identify some of the occupant safety hazards in the ambulance environment and to determine the efficacy of some countermeasures to mitigate ambulance occupant injury. Accelerator sled testing of the ambulance rear patient compartment (ambulance box or rear cabin) with Anthropomorphic Test Devices was conducted under frontal impact conditions with a target sled pulse was 26 G and 30 mph. The ambulance box was configured with instrumented and uninstrumented Anthropomorphic Test Devices positioned as in the real world environment. Two uninstrumented 95% Hybrid-II Anthropomorphic Test Devices were lap belted and positioned in the occupant compartment, one on the rear-facing attendant’s seat and one on the side-facing bench seat. A Side Impact Dummy was unbelted, seated on the front of the side-facing bench seat and positioned next to a passive restraint device. An instrumented Hybrid-III 3 year old child Anthropomorphic Test Device was restrained in a child restraint system, secured to the gurney via a dual belt path. The actual sled pulse achieved was 34Gs and 34.34 mph, and due to separation of the ambulance box from the chassis/sled, the crash pulse imparted to the patient compartment were 20Gs and 20.9 mph. Head Injury Criterion (HIC) values calculated for the restrained Hybrid-III child Anthropomorphic Test Device were 171, however for the unbelted Side Impact Dummy the HIC was projected to be in excess of 1000. Although this study was a preliminary study, the findings confirmed that there are unique occupant hazards in the ambulance vehicle environment and that certain restraint practices are of value and that some injury mitigating countermeasures are ineffective. Importantly this study also demonstrated the potential for unrestrained occupants to be not only a hazard to themselves but also a hazard to the restrained occupants in the ambulance patient compartment. This study highlights the need for the development of dynamic safety standards for occupant restraint in this environment.
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Citation
Levick, N., Li, G., and Yannaccone, J., "Biomechanics of the Patient Compartment of Ambulance Vehicles under Crash Conditions: Testing Countermeasures to Mitigate Injury," SAE Technical Paper 2001-01-1173, 2001, https://doi.org/10.4271/2001-01-1173.Also In
SAE 2001 Transactions Journal of Passenger Cars - Mechanical Systems
Number: V110-6; Published: 2002-09-15
Number: V110-6; Published: 2002-09-15
Vehicle Aggressivity and Compatibility in Automotive Crashes 2001
Number: SP-1601; Published: 2001-03-05
Number: SP-1601; Published: 2001-03-05
References
- Best GH Zivkovic G Ryan GA Development of an effective ambulance patient restraint Society of Automotive Engineering Australasia Journal 53 1 17 4 1993
- Levick NR Winston F Aitken S Freemantle R Marshall F Smith G Development and Application of a Dynamic Testing Procedure for Ambulance Pediatric Restraint Systems Society of Automotive Engineering Australasia March/April 1998 58 2 45 51
- Auerbach PS Morris JA Phillips JB Redlinger SR Vaughn WK An analysis of ambulance accidents in Tennessee JAMA 1987 Sept 258 11 1487 90
- Biggers WA Zachariah BS Pepe PE Emergency Medical Vehicle Collisions in an Urban System, Prehospital and Disaster Medicine July–Sept. 1996
- Saunders CE Heye CJ Ambulance Collisions in an Urban Environment, Prehospital and Disaster Medicine 1994 9 2 118 124
- 1987–98
- Nov 1994
- December 1999 http://www.nhtsa.dot.gov http://www.ems-c.org
- March 1992
- 1999
- 1999