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Conduction velocity of peristaltic waves in the in vivo ureter: application of a new diameter gauge

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Summary

The conduction velocity of peristaltic movements of the canine ureter was measured under anaesthesia with a new type of diameter gauge using an image sensor. The peristaltic velocity was 34.1±6.2 mm/sec in 10 experiments. Noradrenaline at a low dosage of 1 μg/kg i.v. reduced the resting diameter, increased the conduction velocity to 47–56 mm/sec, and approximately doubled the frequency of contraction. The application of acetylcholine also caused an increase in both frequency and conduction velocity (42–46 mm/sec). A plot of the conduction velocity against the mean period of peristaltic contraction was hyperbolic in shape.

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Author notes

  1. M. Sakaguchi

    Present address: Department of Electrical Engineering, Nagano Technical College, 380, Nagano, Japan

Authors and Affiliations

  1. Department of Physiology, and Research Laboratory for Cardiovascular Diseases, Shinshu University, School of Medicine, 390, Matsumoto, Japan

    T. Ohhashi, T. Miyazawa, T. Azuma & M. Sakaguchi

Authors
  1. T. Ohhashi
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  2. T. Miyazawa
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  3. T. Azuma
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  4. M. Sakaguchi
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Ohhashi, T., Miyazawa, T., Azuma, T. et al. Conduction velocity of peristaltic waves in the in vivo ureter: application of a new diameter gauge. Experientia 37, 377–378 (1981). https://doi.org/10.1007/BF01959871

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  • DOI: https://doi.org/10.1007/BF01959871

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