scholarly journals Forensic Engineering Studies Using Exemplar Vehicles And Surrogates In Vehicle Impact Cases

Author(s):  
William E. Lee

As Part Of Their Event Reconstruction, Accident Reconstructionists Often Inspect Exemplar Motor Vehicles. xemplarmeans A Vehicle Of The Same Model, Production Series, Etc. In Terms Of The Vehicle Of Interest. In The Analysis Of The Injury Aspects Of Vehicular Collisions, Biomechanics Experts Can Also Benefit From Exemplar Studies, Especially When A Surrogate (Individual Of The Same Gender, Age Group, Body Stature, Etc.) Is Incorporated Into The Study. This Is Often An Important Activity Since Available Physical Evidence Is Often Limited. For Example, Photo Documentation May Focus Almost Exclusively On The Outside Of The Subject Vehicle, Whereas The Injury Event(S) Often Occur Within The Vehicle. Also, Providers Of Vehicle Specifications Typically Provide Limited (If Any) Vehicle Interior Information. Finally, Depositional Information May Be Very Limited, Providing Few Details On Events And Conditions That May Have Contributed (Or Not) To Claimed Injuries. Thus, Exemplar/Surrogate Studies Can Provide A Wealth Of Information In The Analysis Of What Injuries May (Or May Not) Have Occurred Knowing The Physics Of The Accident Reconstruction And The Resulting Occupant Kinematics, Geometric Considerations, Claimant Characteristics, And The Associated Injury Mechanisms. A Series Of Situations Will Be Presented As Examples Of How Exemplar/Surrogate Studies Can Be Useful In Injury Analysis, Including Seat Belt Issues, Rear-End Collisions, And Pedestrian/Vehicle Incidents. General Protocol Considerations Will Also Be Presented.

Author(s):  
William E. Lee

Forensic engineering experts with expertise in the field of biomechanics are frequently retained to conduct a biomechanical analysis of some injury-related incident. This may involve the areas of injury event reconstruction, what forces may have been involved, how the person responded to these forces, and whether injury mechanisms consistent with the claimed injuries were (or were not) established during the incident. It is the view of someengineering biomechanics experts that the presentation of injury mechanism-related opinions is based on biomechanics (a subject of engineering) and is not intended to serve as an opinion regarding injury causation (i.e., was the claimant injured as a result of the described incident). Attorneys have challenged the ability of forensic engineering biomechanics experts to offer injury mechanism-related opinions (and often the other associated areas described above) based on a theory that “biomechanics” is not a subject of engineering, butrather a subject of medicine, and, in turn, the engineering expert should not be allowed to present such opinions. This paper explores the validity of this claim, focusing on the academic evidence. More specifically, academic programs within the United States in both the areas of engineering and medicine were examined to find evidence of formal classes in the area of biomechanics, dedicated biomechanics research activities, current textbooks and references (focusing on author affiliation), and other academic-related activities.


Author(s):  
William Lee

Nerve entrapments of the median nerve, i.e., carpal tunnel syndrome (CTS) and the ulnar nerve, i.e., cu-bital syndrome (CT) are relatively common, reflecting traumatic and atraumatic mechanisms. Claims of such injuries in relation to rear-end collisions (particularly low-velocity or < 10 mph collisions) are often contested by the defense, acknowledging that there is no obvious relationship between the collision and the claimed inju-ries. Of the collision types (frontal, side, rear-end), it is the least clear how a rear-end collision can establish mechanisms for such injuries. Direct blunt trauma to the carpal tunnel region or the cubital tunnel region are unlikely in a rear-end collision. Also, “stretch” injuries due to hypermotion of either the wrist or elbow are unlikely, reflecting occupant kinematics, vehicle interior geometry, and other factors. A case study involving CTS and CT claims as a result of a low-velocity rear-end collision will be presented.


PEDIATRICS ◽  
1985 ◽  
Vol 76 (3) ◽  
pp. 382-386
Author(s):  
Phyllis F. Agran ◽  
Debora E. Dunkle ◽  
Diane G. Winn

In a sample of children less than 4 years of age, treated in an emergency room after a motor vehicle accident, 22% were restrained in a child safety seat (improper and proper), 12% were restrained by a vehicle seat belt, and 70% were unrestrained. Trauma and injury patterns related to the various restraint use patterns are described. Most children in safety seats and seat-belted children, if injured, sustained minor contusions, abrasions, or lacerations. Injury among properly restrained children in safety seats was primarily the result of unavoidable mechanisms (eg, flying glass, intrusion). Improper use contributed to injury among safety-seat-restrained children, primarily by allowing the child to hit against the vehicle interior. Seat-belted children also were injured, primarily by hitting against the vehicle interior. Although some of the restrained children were seriously injured, in general, restrained children tended to sustain less serious and fewer injuries than the unrestrained children.


Author(s):  
Kenneth J. Saczalski ◽  
Eugene B. Loverich

Abstract Forensic engineering problems are reviewed to demonstrate how vibration analysis methods can be utilized in certain instances to determine cause of system failures and injury mechanics associated with certain vehicular accidents. A brief overview of injury criteria and biomechanical analysis methods for evaluation of motor vehicle occupant kinematics induced by shock impact loadings is also included.


2021 ◽  
Author(s):  
Chantal Parenteau ◽  
Roger Burnett ◽  
Sri Sai Kameshwari Danthurthi ◽  
Christopher Andrecovich

PEDIATRICS ◽  
1978 ◽  
Vol 62 (3) ◽  
pp. 280-287
Author(s):  
Keith S. Reisinger ◽  
Allan F. Williams

Three in-hospital educational programs for postpartum women, designed to increase the crash protection of infants in cars, were evaluated in comparison to a group that received no education. The programs consisted of (1) literature, plus making infant carriers readily accessible and convenient to purchase; (2) literature, plus a personal discussion, plus making infant carriers readily accessible and convenient to purchase; and (3) literature, plus the offer of a free infant carrier. The programs increased the extent to which infant carriers were used to transport babies in cars, but had little or no effect on the key outcome measure: use of infant carriers fastened by the car seat belt so that crash protection is provided. Rates of such use were low in all groups. It is concluded that ways of providing increased crash protection to infant and child travelers in addition to use of restraint systems requiring the active, voluntary cooperation of parents must be encouraged. "Passive" (automatic) protection techniques, such as air bags and vehicle interior modifications, have great potential in this regard.


Author(s):  
Lester R. Reekers

Disputes resulting from low-velocity vehicular collisions have increased dramatically in number during the recent decade. According to the California State Insurance Department, staged auto accidents have risen at an average annual rate of 38% since 1986. Hard figures are not available, but most experts say 10% to 15% of all claim dollars paid out on car insurance result from some form of fakery. According to the Insurance Information Institute, that works out to between $5.4 billion and $8.1 billion of the $54 billion in claims paid last year. An Insurance Research Council study shows that in 1989 insurers paid 55.7 injury claims in California for every 100 auto property damage claims, and 57% of those making bodily injury claims were represented by an attorney. Litigators frequently utilize the assistance of the forensic engineering expert to resolve the legal issues involved in these disputes. Available reference materials for the analysis may be minimal, consisting only of c


Author(s):  
Jerry S. Ogden

The Forensic Engineering Analysis Of Bicycle-Vehicle Incidents Presents Its Own Unique Set Of Challenges. Often, The Forensic Engineer Is Faced With A Limited Data Set For Determining Vehicle Impact Speed From The Physical Evidence Produced By A Bicycle Collision With An Automobile, Which May Not Be Of Issue For A Vehicle-To-Vehicle Collision At Similar Speeds. This Paper Analyzes A Collision Between A Light Duty Pickup Pulling A Tandem Axle Utility Trailer And A Bicycle Ridden By A Minor Child. There Were Allegations That The Pickup Was Traveling At A High Speed Above The Speed Limit, As Well As Passing Another Vehicle At The Time Of The Incident. In Order To Accurately And Dependably Determine The Speed Of The Ford F350 Pickup Involved In This Incident Event, This Forensic Engineer Elected To Recreate The Vehicle Locked Wheel Skidding Evidence That Was Produced During The Incident Event And Photographically Recorded By Police Investigators. The Dynamic Skid Testing Technique, Test Equipment, And General Test Procedures Used To Accurately Determine Vehicle Speeds For This Incident Event, And How It Can Be Applied To Similar Collision Events Are Discussed In This Paper


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