Bicalho R C, Cheong S H, Warnick L D, Nydam D V, Guard C L
Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY 14853, USA.
J Dairy Sci. 2006 Jul;89(7):2596-602. doi: 10.3168/jds.S0022-0302(06)72336-0.
The objectives of the study were to evaluate the effects of digit amputation and arthrodesis surgery performed in the field on culling and milk production during the early postsurgical period. Cows from 3 commercial dairy farms in New York State were recruited for the study. A total of 49 cows on which digit amputation (AMP) was performed were matched with 68 controls (MC-AMP), and 17 cows on which arthrodesis surgery (ARTHRO) was performed were matched with 20 controls (MC-ARTHRO) according to lactation, DIM, and lactation at the time of surgery. Performance was not directly comparable between the AMP and ARTHRO groups because cows were not randomly assigned to the 2 treatment groups. Therefore, each surgical group was evaluated relative to its respective matched control group. Cows with AMP had a significantly lower estimated median survival of 68 d (95% confidence interval; lower = 35 d, upper = 156 d) compared with 585 d (95% confidence interval; lower = 469 d, upper = 699 d) for the MC-AMP group. Total milk production for the first 60 d postsurgery was significantly lower for the AMP (1,533 +/- SE = 101 kg) group compared with the MC-AMP (2,121 +/- 101 kg) group and for the ARTHRO (1,883 +/- 86 kg) group compared with the MC-ARTHRO (2,250 +/- 88 kg) group. Septic arthritis of the distal interphalangeal joint was the most common condition treated by surgery, accounting for 70.5% of ARTHRO cases and 73.5% for AMP. Toe necrosis accounted for 14.3% of AMP cases, and retroarticular abscess made up the rest of the AMP (12.2%) cases and 29.5% of the ARTHRO cases. Results suggest that cows that had undergone ARTHRO had a lower culling rate and a faster return to production compared with those that had undergone AMP. Arthrodesis should be considered as a treatment option for deep sepsis of the bovine foot.
本研究的目的是评估在现场进行的趾截肢术和关节固定术对术后早期淘汰率和产奶量的影响。从纽约州的3个商业奶牛场招募奶牛进行研究。根据泌乳期、产犊后天数（DIM）和手术时的泌乳情况，将总共49例行趾截肢术（AMP）的奶牛与68头对照奶牛（MC - AMP）进行匹配，将17例行关节固定术（ARTHRO）的奶牛与20头对照奶牛（MC - ARTHRO）进行匹配。由于奶牛未被随机分配到这两个治疗组，因此AMP组和ARTHRO组之间的性能不能直接比较。因此，每个手术组相对于其各自匹配的对照组进行评估。与MC - AMP组的585天（95%置信区间；下限 = 469天，上限 = 699天）相比，AMP组奶牛的估计中位生存期显著较低，为68天（95%置信区间；下限 = 35天，上限 = 156天）。术后前60天，AMP组（1,533 +/- 标准误 = 101千克）的总产奶量显著低于MC - AMP组（2,121 +/- 101千克），ARTHRO组（1,883 +/- 86千克）的总产奶量显著低于MC - ARTHRO组（2,250 +/- 88千克）。远端指间关节化脓性关节炎是手术治疗的最常见病症，占ARTHRO病例的70.5%，占AMP病例的73.5%。趾坏死占AMP病例的14.3%，关节后脓肿占AMP其余病例的12.2%和ARTHRO病例的29.5%。结果表明，与接受AMP手术的奶牛相比，接受ARTHRO手术的奶牛淘汰率较低，恢复产奶速度更快。关节固定术应被视为牛足部深部脓毒症的一种治疗选择。
