van Mastrigt R, van de Wetering J, Glerum J J
Urol Int. 1986;41(4):266-9. doi: 10.1159/000281215.
The influences of ureter temperature and time interval between stimulations on the velocity of propagation of contractions in the pig ureter were studied in vitro. The propagation velocity was calculated from electromyogram signals measured at regular distances along the ureter. It was found that a temperature decrease of 3 degrees C causes a velocity decrease of nearly 5 mm/s. The influence of the interstimulus interval is much smaller: a reduction from 300 to 10 s causes a 10% drop in propagation velocity. Both phenomena can be understood from changes in the strength-duration curve describing the excitability of the tissue and clarify the discrepancies between propagation velocity measurements in vitro and in vivo.
在体外研究了输尿管温度和刺激间隔时间对猪输尿管收缩传播速度的影响。传播速度是根据沿输尿管等距测量的肌电图信号计算得出的。发现温度降低3摄氏度会导致速度降低近5毫米/秒。刺激间隔的影响要小得多：从300秒减少到10秒会导致传播速度下降10%。这两种现象都可以从描述组织兴奋性的强度-持续时间曲线的变化中得到理解，并澄清了体外和体内传播速度测量之间的差异。
