Search Results

You are looking at 1 - 10 of 26 items for

  • Author or Editor: A. N. Baird x
  • Refine by Access: All Content x
Clear All Modify Search
in Journal of the American Veterinary Medical Association
in Journal of the American Veterinary Medical Association
in Journal of the American Veterinary Medical Association
in Journal of the American Veterinary Medical Association
in Journal of the American Veterinary Medical Association
in Journal of the American Veterinary Medical Association

Summary

Effects of the following treatments on abomasal and duodenal myoelectric activity in yearling cattle were studied: 2 ml of 0.9% sodium chloride solution (nacl); 0.07 mg of bethanechol (bet)/kg of body weight; 0.1 mg of metoclopramide (met)/kg; and 0.07 mg of bethanechol and 0.1 mg of metoclopramide (betmet)/kg. All treatments were administered SC during the early part of phase I of the migrating myoelectric complex. Myoelectric signals were recorded for 4 hours after administration of the treatments from 1 electrode in the antrum and 3 electrodes in the duodenum.

For the antral spike rate (asr), there was no significant difference among treatments during the first hour, but the asr was significantly (P < 0.05) greater during hours 2 to 4 after treatment with betmet, compared with asr. for met alone. The duodenal spike rate (dsr) was significantly (P < 0.05) greater during the first hour after administration of betmet than after the other treatments. After administration of BET, DSR was significantly (P < 0.05) greater than after met or nacl. There was no difference in dsr after met, compared with dsr after nacl. There was no significant difference in dsr among treatments during the second and third hours. The total antegrade propagating spike (tatp) count was greater after administration of betmet in all hours, compared with the other treatments. The ratio of taps to total spikes on the orad-most duodenal electrode was significantly (P < 0.05) greater after betmet during hours 1 and 2.

Free access
in American Journal of Veterinary Research
in Journal of the American Veterinary Medical Association

Abstract

Objective—To determine the outcome and subsequent fertility of sheep and goats undergoing a cesarean section because of dystocia.

Design—Retrospective study.

Animals—85 sheep and 25 goats.

Procedure—Medical records were reviewed, and information was obtained on signalment, history, physical examination findings, anesthesia protocol, surgical technique, number of lambs or kids delivered, pre- and postoperative treatments, duration of hospitalization, and postoperative complications. Follow-up information was obtained through telephone conversations with owners.

Results—The proportion of sheep admitted to the veterinary teaching hospital during the study period that underwent a cesarean section (4.4%) was significantly higher than the proportion of goats that did (2.2%). Pygmy goats were overrepresented, compared with the hospital population. The most common reason for cesarean section was inadequate dilatation of the cervix. The most common surgical approach was via the left paralumbar fossa. Two hundred one lambs and kids were delivered, of which 116 were dead at delivery or died shortly afterward. Forty-two of the 65 dams with 1 or more dead fetuses had been in stage-2 labor for > 6 hours, and fetal death was significantly associated with a prolonged duration of dystocia. The most common complication following surgery was retained placenta (n = 49). Use of antimicrobials was associated with a lower rate of complications. All 16 dams that were rebred became pregnant and had no problems with dystocia.

Conclusions and Clinical Relevance—Results suggest that cesarean section is an effective method of resolving dystocia in sheep and goats and does not adversely affect subsequent fertility. (J Am Vet Med Assoc 2004;224:275–279)

Full access
in Journal of the American Veterinary Medical Association
in Journal of the American Veterinary Medical Association