| Validation of the acute electroencephalographic responses of calves to noxious stimulus with scoop dehorning. | |
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MedLine Citation:
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PMID: 17676078 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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AIM: To validate use of the electroencephalogram (EEG) and a minimal anaesthesia model for assessment of noxious sensory input caused by scoop dehorning of calves. METHODS: Twenty Friesian heifers weighing 125-178 kg were maintained under light general anaesthesia using halothane and an established protocol (minimal anaesthesia model). They were then dehorned using a scoop dehorner either with (DH+LA) or without (DH) a lignocaine ring block, and changes in the EEG and electrocardiogram (ECG) recorded. Median frequency (F50), 95% spectral edge frequency (F95) and total power (Ptot) were derived from the EEG data. RESULTS: There were significant increases in the F50 (p<0.01) and F95 (p<0.01), and a decrease in Ptot (p<0.01) following dehorning in the DH group, but there were no changes in the DH+LA group. Transient bradycardia in the first 75 sec following dehorning was recorded in the DH group compared with both pre-treatment values in the same group and with the DH+LA group (p<0.001). Tachycardia was evident by 15 min after dehorning in the DH but not the DH+LA group. CONCLUSIONS: The results validate use of the EEG and a minimal anaesthesia model for assessment of noxious sensory inputs in cattle. |
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Authors:
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T J Gibson; C B Johnson; K J Stafford; S L Mitchinson; D J Mellor |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Validation Studies |
Journal Detail:
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Title: New Zealand veterinary journal Volume: 55 ISSN: 0048-0169 ISO Abbreviation: N Z Vet J Publication Date: 2007 Aug |
Date Detail:
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Created Date: 2007-08-06 Completed Date: 2007-09-27 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0021406 Medline TA: N Z Vet J Country: New Zealand |
Other Details:
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Languages: eng Pagination: 152-7 Citation Subset: IM |
Affiliation:
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Animal Welfare Science and Bioethics Centre, Massey University, Private Bag 11222, Palmerston North, New Zealand. t.g.gibson@massey.ac.nz |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Anesthesia, General
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veterinary* Anesthetics, Local / administration & dosage Animals Cattle* / physiology, surgery Cautery / methods, veterinary Electrocardiography / methods, veterinary Electroencephalography / methods, standards, veterinary* Female Horns / surgery* Lidocaine / administration & dosage Pain Measurement / methods, standards, veterinary* Tachycardia / epidemiology, veterinary |
| Chemical | |
Reg. No./Substance:
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0/Anesthetics, Local; 137-58-6/Lidocaine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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