Aschner Eyeball-pressure Test for Dogs
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Accession number;04A0231715
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| Title;Aschner Eyeball-pressure Test for Dogs |
| Author;
KAWASAKI YASUAKI
(Kagoshima Univ., Fac. Agriculture, JPN)
MORIYAMA YOSHITO
(Kagoshima Univ., Fac. Agriculture, JPN)
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Journal Title;Journal of the Japan Veterinary Medical Association
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Journal Code:Y0220A
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ISSN:0446-6454
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VOL.57;NO.3;PAGE.186-191(2004)
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| Figure&Table&Reference;FIG.2, TBL.2, REF.21 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Heart-rate variability (HRV) induced by the Aschner eyeball-pressure test was analyzed in 7 adult dogs. Ocular compression (OC) used was 95g/cm2, and duration was 20 seconds. Average, standard deviation (SDR-R), coefficient of variance (CVR-R) of the RR interval (RRI) of electrocardiogram, and beat-to-beat instantaneous heart rates (IHR) were used as indices for HRV. The RRI time series (RRITS) was divided into short-term (STTS) and long-term time series (LTTS) by means of a 13-point simple moving average method. The mean cycle of STTS correlated closely with that of the respiration curve (r=0.974), indicating that the STTS reflects respiratory sinus arrhythmia (RSA). No HRV variables in the STTS changed significantly, but SDR-R and CVR-R in the RRITS and CVR-R in the LTTS increased significantly (P<0.05) as a result of OC. Therefore, OC-induced parasympathotonia may reflect on CVR-R of the RRI in dogs with RSA. The maximum physiological bradycardia caused by OC was -10.4.+-.3.4 beats/min (-13.1.+-.5.0%) compared to the mean IHR one minute before compression. On the basis of the 95% confidence interval of bradycardia (-12.9--7.8 beats/min) (-16.8--9.4%), we concluded that the hyper-reflexia of this test as applied to dogs represents a drop in heart rate of 17% or more. (author abst.) |
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