Temporary cavitation related to intracranial pressure occurs as a bullet passes through a medium creating a temporary cavity in its wake, a feature of all missile wounds (17). In the case of a bullet wound to the head, a large temporary cavity would be created because of the low retentive forces of brain tissues (17).
The brain is contained within the rigid skull, and therefore, as a temporary cavity expands, a high pressure is created within the cranium. The high pressure within the cranium and the subsequent collapse of the temporary cavity creates a force to drive tissue and blood back out the entrance wound (8,12). Karger (13) proposed that anatomical structures similar to liquid filled cavities provide the best conditions for temporary cavitation. Fackler (18) believed that the collapse of a temporary cavity is the only mechanism that creates backspatter.
Temporary cavitation related to intracranial pressure occurs as a bullet passes through a medium creating a temporary cavity in its wake, a feature of all missile wounds (17). In the case of a bullet wound to the head, a large temporary cavity would be created because of the low retentive forces of brain tissues (17).The brain is contained within the rigid skull, and therefore, as a temporary cavity expands, a high pressure is created within the cranium. The high pressure within the cranium and the subsequent collapse of the temporary cavity creates a force to drive tissue and blood back out the entrance wound (8,12). Karger (13) proposed that anatomical structures similar to liquid filled cavities provide the best conditions for temporary cavitation. Fackler (18) believed that the collapse of a temporary cavity is the only mechanism that creates backspatter.
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