Table 5.
Occurrence of visible brain damage in cadaver heads from mature sows and boars (BW < 200 kg) assigned to three penetrating captive bolt (PCB) placements1 and sectioned by band saw following the plane of bolt entry
| Sex | PCB placement | Overall brain damage | ||
|---|---|---|---|---|
| Proportion (observed/total) | Percentage | 95% CI2 | ||
| SOWS | ||||
| FRONTAL | 10/10 | 100.0 | 69.2% to 100.0% | |
| TEMPORAL | 9/9 | 100.0 | 66.4% to 100.0% | |
| BEHIND EAR | 0/10 | 0.0 | 0.0% to 30.1% | |
| BOARS | ||||
| FRONTAL | 8/9 | 88.9 | 51.7% to 99.7% | |
| TEMPORAL | 7/10 | 70.0 | 34.8% to 93.3% | |
| BEHIND EAR | 4/11 | 36.4 | 10.9% to 69.2 % | |
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 overall brain damage.