To these belong lacerations and wounds of the arteries produced by cuts, thrusts, or gun-shot wounds.

Spontaneous lacerations are the most important of any, especially those of the trunk of the aorta. To this class belong lacerations of the large arteries arising from violent concussions or shocks, viz., in consequence of a contusion (as, for instance, by a spent ball), striking a circumscribed portion of the vessel. No special interest attaches itself to those lacerations of the arteries which arise from excessive extension; such as, for instance, in the arteries of the extremities from dislocations, and which may be associated with extensive lacerations of the soft parts, and destruction of the bones.

Wounds of the arteries inflicted by cuts, thrusts, and shots, derive importance from the conditions of false and varicose aneurism, in which they frequently result.