Influence of impact velocity and impact attack angle of bullets on damage of human tissue surrogate -- ballistic gelatin.

Purpose: Terminal performance of a bullet in human body is critical for the treatment of gunshot injury and optimization of bullet design. The effects of the impact velocity (v) and the impact attack angle (δ) of the bullet on its terminal performance was investigated, using a new evaluation method (called expansion method) based on the expansion of cracks and the permanent cavity wall in ballistic gelatin.

Methods: Ballistic gelatin was used to simulate human body.

[Fire needling on dysphagia due to pseudobulbar palsy after stroke: a randomized controlled trial].

Objective: To observe the clinical effect of fire needling on dysphagia due to pseudobulbar paralysis after stroke and to compare the difference in clinical effect between fire needling and swallowing function rehabilitation training.

Methods: A total of 76 patients with dysphagia due to pseudobulbar paralysis after stroke were randomly divided into an observation group and a control group, 38 cases in each group (1 case dropped out in the control group). The both groups were based on conventional western medication treatment.