Royal Veterinary College, University of London, Hatfield AL9 7TA, United Kingdom.
Meat Sci. 2012 Feb;90(2):368-72. doi: 10.1016/j.meatsci.2011.07.024. Epub 2011 Aug 6.
The time to onset of arrested blood flow and the size of false aneurysms in the severed carotid arteries were assessed in 126 cattle during halal slaughter without stunning. Thirty six cattle (29%) showed early arrest of blood flow. In 6%, both the left and right carotid arteries in the same animal stopped bleeding before 60s had elapsed following the neck cut. The time to early arrested blood flow was on average 21s, and this was accompanied by enlargement with false aneurysms which occluded the arteries. In the arteries which were still bleeding at 60s after the neck was cut the artery size was normal. Based on comparative data from different slaughter premises it appeared that making the cut in the neck at the first cervical vertebra instead of the second to fourth cervical vertebrae reduced the frequency of false aneurysm formation and early arrested blood flow. This was confirmed in a separate controlled trial where 100 cattle were stunned with a captive bolt and the arteries were examined following neck cutting at either the C1 or C3 positions.
在无致昏的情况下进行清真屠宰时，评估了 126 头牛颈部切断后血流停止时间和假性动脉瘤的大小。36 头牛（29%）表现出早期血流停止。在 6%的动物中，颈部切断后 60 秒内，同一动物的左右颈动脉均停止出血。早期血流停止的时间平均为 21 秒，同时伴有假性动脉瘤增大，导致动脉阻塞。在颈部切断后 60 秒仍在出血的动脉中，动脉大小正常。根据不同屠宰场的比较数据，似乎在第一颈椎而不是第二至第四颈椎处进行颈部切割可降低假性动脉瘤形成和早期血流停止的频率。这在一项单独的对照试验中得到了证实，其中 100 头牛被电击枪致昏，然后在 C1 或 C3 位置进行颈部切割后检查动脉。
