THE BIOMECHANICAL RESPONSE OF THE LOWER ABDOMEN TO BELT-RESTRAINT LOADING

The biomechanical response of the lower abdomen was investigated by simulated belt-restraint loading to the lower abdomen in a supine, rigidly supported, anesthetized porcine subject. Impacts were delivered through a belt interface to the external ventrodorsat dimension of the lower abdomen at L4. A combination of a velocity and compression varying from 1.6-6.6 m/s and 6-67%, respectively, constituted one impact. The belt restraint loading system enabled measurements of total load and belt tension. Film analysis provided values for deflection, compression, velocity of deformation and the maximum product of the deformation velocity and the instantaneous compression ((V*C)max). Injuries to the mesentry, the duodenum, the small and large bowel, the cecum, the spleen and rectum ranged from simple contusions and lacerations (AIS=2) to large ruptures with peritoneal contamination (AIS=5). As indicated by Logist generated probability curves, the peak force-maximum compression (Fmax*Cmax) provided the best correlate to injury severity at both AIS>=3 and 4 and was, therefore, the best predictor of injury tolerance for the lower abdomen. Force-deformation curves, characterized by a gradual, almost linear rise followed by an approximately vertical line during unloading, provided information on the stiffness of the lower abdomen in response to belt-loading. Force-deflection curves based on total load indicated a reasonable correlation (R2=0.61) between estimated lower abdominal stiffness and velocity.

  • Corporate Authors:

    General Motors Corporation

    Research and Development Center, 30500 Mound Road
    Warren, MI  United States  48090
  • Authors:
    • Miller, M A
  • Publication Date: 1988-5-3

Media Info

  • Features: Figures; References; Tables;
  • Pagination: v.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00608310
  • Record Type: Publication
  • Report/Paper Numbers: GMR-6276
  • Files: TRIS
  • Created Date: May 31 1991 12:00AM