Predicting Temporary Cavity Size from Radial Fissure Measurements in Ordnance Gelatin

Ragsdale, Bruce D.; Josselson, Arnold R.

doi:10.1097/00005373-198801001-00003

Cited by 33 publications

(22 citation statements)

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“…The presence of skin particles at the end of radial slits in gelatin supports the assumption that the dynamics of the temporary cavity are causal for the displacement of skin particles. The number and length of the gelatin fissures allow an estimation of the maximum extent of the temporary cavity [5,16].…”

Section: Discussionmentioning

confidence: 99%

Gunshot-related displacement of skin particles and bacteria from the exit region back into the bullet path

Vennemann

Perdekamp

Kneubuehl³

et al. 2006

Int J Legal Med

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In previous studies, it was shown that there is a gunshot-related transport of skin particles and microorganisms from the entrance region into the depth of the bullet path. The present study deals with the question of whether gunshots may also cause a retrograde transport of skin particles and microorganisms from the bullet exit region back into the bullet path. For this purpose, we used a composite model consisting of rectangular gelatin blocks and pig skin. The skin pieces were firmly attached to the gelatin blocks on the side where the bullet was to exit. Prior to the test shots, the outer surface of the pig skin was contaminated with a thin layer of a defined bacterial suspension. After drying the skin, test shots were fired from a distance of 10 m using cartridges calibre .38 spec. with different bullet types. Subsequent analyses showed that in all shots with full penetration of the composite model, the bullet path contained displaced skin particles and microorganisms from the skin surface at the exit site. These could be regularly detected in the distal 6-8 cm of the track, occasionally up to a distance of 18 cm from the exit hole. The distribution of skin particles and microorganisms is presented and the possible mechanism of this retrograde transport is discussed.

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Section: Discussionmentioning

confidence: 99%

Gunshot-related displacement of skin particles and bacteria from the exit region back into the bullet path

Vennemann

Perdekamp

Kneubuehl³

et al. 2006

Int J Legal Med

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“…Ragsdale and Josselson [17] used 20% gelatine at þ4 8C to investigate temporary cavity formation. As both increased concentration and low temperature make gelatine stiffer it can be suspected that the recording sensitivity and thus accuracy of the results were significantly impaired.…”

Section: Review On Various Preparation Methodsmentioning

confidence: 99%

Preparing ballistic gelatine—review and proposal for a standard method

Jussila¹

2004

Forensic Science International

198

135

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“…By measuring the total crack lengths (TCL) along a projectile course through gelatine as described in the literature [7,8], one can calculate the amount of energy transferred to the tissue with the formula [9]. The Σr i refers to the sum of the length of all the cracks of a section of the projectile's passage, c is a constant to be defined and (E) i is the amount of energy transferred to the surrounding tissue of such a passage section.…”

Section: Introductionmentioning

confidence: 99%

Gunshot energy transfer profile in ballistic gelatine, determined with computed tomography using the total crack length method

et al. 2010

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By measuring the total crack lengths (TCL) along a gunshot wound channel simulated in ordnance gelatine, one can calculate the energy transferred by a projectile to the surrounding tissue along its course. Visual quantitative TCL analysis of cut slices in ordnance gelatine blocks is unreliable due to the poor visibility of cracks and the likely introduction of secondary cracks resulting from slicing. Furthermore, gelatine TCL patterns are difficult to preserve because of the deterioration of the internal structures of gelatine with age and the tendency of gelatine to decompose. By contrast, using computed tomography (CT) software for TCL analysis in gelatine, cracks on 1-cm thick slices can be easily detected, measured and preserved. In this, experiment CT TCL analyses were applied to gunshots fired into gelatine blocks by three different ammunition types (9-mm Luger full metal jacket, .44 Remington Magnum semi-jacketed hollow point and 7.62 × 51 RWS Cone-Point). The resulting TCL curves reflected the three projectiles' capacity to transfer energy to the surrounding tissue very accurately and showed clearly the typical energy transfer differences. We believe that CT is a useful tool in evaluating gunshot wound profiles using the TCL method and is indeed superior to conventional methods applying physical slicing of the gelatine.

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Predicting Temporary Cavity Size from Radial Fissure Measurements in Ordnance Gelatin

Cited by 33 publications

References 0 publications

Gunshot-related displacement of skin particles and bacteria from the exit region back into the bullet path

Gunshot-related displacement of skin particles and bacteria from the exit region back into the bullet path

Preparing ballistic gelatine—review and proposal for a standard method

Gunshot energy transfer profile in ballistic gelatine, determined with computed tomography using the total crack length method

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