Comparison of temporal cavity indicators when firing "FORT 12R" and "AE 790G1" into a non-biological body simulator.

Abstract

Gunshot injuries are extremely dangerous due to the extremely unpredictablecompliance of ammunition after contact with the body. One of the key elements thattakes place in this case is the formation due to high kinetic energy of a temporary cavity,which, despite its existence for a fraction of a second, causes severe damage to thetissues of the human body. The study of this phenomenon is one of the central elementsof ballistics and requires an experiment on optically transparent media. The purpose ofthe study is to compare the parameters of the temporal cavity when fired from the"FORT 12R" and "AE 790G1" pistols into a non-biological simulator of the human body.To achieve the goal, 120 gelatin blocks were produced according to the generallyaccepted method, which were to be shot at close range, 25 and 50 cm. The blocks wereleft bare before shooting, or covered with cotton fabric, denim fabric or leatherette.After firing, transverse sections of the blocks were made in order to further measure theparameters of the temporary cavity formed as a result of the firing, according to generallyaccepted methods. The results of the analysis of the received data regarding theindicators characterizing the dimensions of the temporary cavity at different depths ofthe wound channel revealed a number of significant differences (p<0.05-0.01) betweenthe studied pistols (in almost all cases, "AE 790G1" had larger values), groups ofblocks covered with different types of fabrics, bare blocks (in almost all cases, theclothing had protective properties and reduced the size of the temporary cavity) andallowed to establish that during shots from the "FORT 12R" there was a sharp increasein the size of the temporary cavity with its sharp decrease at the end of the woundchannel, while with shots from the "AE 790G1" the temporary cavity gradually increases,reaching a maximum at half the depth and then just as gradually decreases. Thus,when comparing the "FORT 12R" and "AE 790G1" pistols, differences in the features ofthe formation of the temporary cavity were revealed, which in turn is of interest not onlyfor forensics, ballistics and forensic medicine, but also for clinical medicine.