Table 4.
Percentage of cadaver heads from mature sows and boars (BW < 200 kg) assigned to three penetrating captive bolt (PCB) placements1 in which the brain was located within the plane of bolt travel
| Sex | PCB placement | Brain within plane of bolt travel | ||
|---|---|---|---|---|
| Proportion (observed/total) | Percentage | 95% CI2 | ||
| SOWS | ||||
| FRONTAL | 10/10 | 100.0 | 69.2% to 100.0% | |
| TEMPORAL | 10/10 | 100.0 | 69.2% to 100.0% | |
| BEHIND EAR | 10/10 | 100.0 | 69.2% to 100.0% | |
| BOARS | ||||
| FRONTAL | 8/9 | 88.9 | 51.8% to 99.7% | |
| TEMPORAL | 9/10 | 90.0 | 55.5% to 99.7% | |
| BEHIND EAR | 11/11 | 100.0 | 71.5% to 100.0% | |
1Placements: FRONTAL—Medial bolt entry approximately 3.5 cm superior to the optic orbits at midline perpendicular with the external surface of the head; TEMPORAL—Bolt entry at the depression located between the right eye and right ear; BEHIND EAR—Bolt entry directly caudal to the pinna of the ear on the same plane as the eyes and targeting the middle of the opposite eye.
295% confidence interval for the percentage of heads with the brain in the plane of bolt travel.