Accuracy, however, is lost and the chance of hitting “”non-elastic”" structures such as the head and the chest increases, and therefore, causing greater risk of serious injury or death [7]. Direct-fire rubber bullets were used for the first time by British Forces in Northern Ireland in 1970 [8]. These bullets were also relatively inaccurate, as

such, many injuries and even some AZD1390 datasheet deaths were associated with their use [3, 8, 9]. Children, teenagers, and women who are of a smaller built were reported to sustain severe injuries more often than larger individuals, particularly to the skull, eyes, brain, lungs liver, and spleen. [3, 9–11]. That is in keeping BLZ945 cost with the results of a previous study, performed on unembalmed cadavers, that demonstrated greater injury risk of blunt ballistic impacts in 5th percentile female patients – abbreviated injury severity score chest (AIS-chest 1) – compared to 50th percentile males (AIS-chest 2) struck by a 12-gauge rubber bullet with a mass of 6 g fired at a velocity of 122 m/s [12]. Furthermore, injury tolerance curves showed that if the mass of the bullet is increased to 140 g the velocity should be reduced to 18 m/s to

avoid serious injuries to the chest of a female; a speed that is well below that of current “”less-lethal”" munitions [12]. Because of these safety check details concerns, rubber bullets have been replaced by plastic rounds in many countries [1–3]. The latter are more accurate and have less wounding potential [1, 3, 6, 8]. Interestingly however, the reported

fatality rate of plastic bullets is approximately 1:4000 bullets fired as opposed to 1:18000 for rubber bullets. Those numbers, however, may be misleading because of the many different projectiles with variable wounding aminophylline power used around the world [6, 8, 10, 11]. Nonetheless, similar to rubber bullets, the head and the chest are arguably the areas of the body most vulnerable to severe injuries caused by plastic rounds [2, 3, 10, 11, 13]. Out of the 18 articles reviewed in this study plastic bullets were used in 11, while rubber bullets were used in 8 others; one study reported both types of ammunition. There were 4 deaths from intra-thoracic injuries caused by rubber bullets and 8 deaths from intra-thoracic injuries provoked by plastic ones [11, 13–17]. With respect to intra-thoracic penetration, it was recently demonstrated in post-mortem human subjects, using a 12-gauge (6.4 g) rubber bullet, that the region with lowest average energy for penetration impact was the area between the ribs (33.1 J/cm2), while the posterior rib area had the highest energy density for penetrating events (55.9 J/cm2) [18]. Thus, based on our review, many “”less-lethal”" munitions have impact energy above the threshold for penetration; including the one described in the present case report (200 J).