COMPRESSION FRACTURES OF THORACIC VERTEBRAE APPARENTLY RESULTING FROM EXPERIMENTAL IMPACT, A CASE REPORT

Abstract

The occurrence of compression deformities of the fourth and fifth thoracic vertebrae in a human test subject (DCL) exposed in laboratory experiments to an impact acceleration profile similar to that produced by ejection seat rockets is reported. This injury was presumed to be the result of an impact profile having a peak acceleration of 18.8G, a rate of onset of 420G per second and a baseline duration of approximately 100 milliseconds. The subject's long axis was inclined backward 34 degrees from the vertical force vector. The diagnosis was established upon the subject's termination of hazardous duty and separation from the service, approximately one year after the presumptive data of injury. This documented injury represents a demonstrable endpoint in impact tolerance of a subject exposed to an acceleration environment which can be specifically described.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1965
Accession Number
AD0622026

Entities

People

  • Edund B. Weis Jr.
  • George C. Mohr
  • John H. Henzel
  • Neville P. Clarke

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Biomedical
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Biomedical Research
  • Bone Fractures
  • Classification
  • Compression
  • Contractors
  • Contracts
  • Ejection
  • Ejection Seats
  • Escape Systems
  • Government Procurement
  • Governments
  • Medical Personnel
  • Pain
  • Spinal Column
  • Spine
  • Wounds And Injuries

Readers

  • Cardiovascular Physiology
  • Explosive Engineering.
  • Neurotrauma and Rehabilitation Medicine.