Taylor D E, Tukmachi E S
Q J Exp Physiol. 1985 Apr;70(2):177-87. doi: 10.1113/expphysiol.1985.sp002901.
The input impedance of the canine common carotid artery has been obtained using high fidelity pressure and flow recordings at the level of the superior thyroid artery. From the impedance spectra initially, and following internal and external carotid artery occlusion, separate estimations of internal carotid, external carotid and external/internal collateral bed impedances were derived by the use of network theory. Studies were carried out on six dogs. The common carotid input resistance was 10.98 +/- 1.42 (S.E.M.) X 10(6) kN.m-5.s, while those for the internal, external and collateral beds were 48.80 +/- 7.12, 14.94 +/- 2.37 and 171.42 +/- 46.83 X 10(6) kN.m-5.s respectively. The impedance spectrum of the common carotid, external carotid and collateral beds were of a high impedance type with major reflexions, while that for the internal carotid bed was of low impedance type with much less reflexion. On standardization of impedance for tissue mass the resistance levels became 17.44 +/- 2.91 X 10(6) kN.m-5.s. 100 g-1 for internal and 85.41 +/- 4.75 X 10(6) kN.m-5.s. 100 g-1 for external carotid beds. Thus, common carotid input impedance differences between dog and man are due to differences in relative mass of tissue perfused by internal and external carotid arteries, rather than to different peripheral-bed characteristics in the two species.
利用甲状腺上动脉水平的高保真压力和流量记录，已获得犬类颈总动脉的输入阻抗。最初从阻抗谱以及颈内动脉和颈外动脉闭塞后，通过网络理论分别得出了颈内动脉、颈外动脉和颈外/内侧支床阻抗的估计值。对6只狗进行了研究。颈总动脉的输入电阻为10.98±1.42（标准误）×10⁶kN·m⁻⁵·s，而颈内、颈外和侧支床的输入电阻分别为48.80±7.12、14.94±2.37和171.42±46.83×10⁶kN·m⁻⁵·s。颈总动脉、颈外动脉和侧支床的阻抗谱为具有主要反射的高阻抗类型，而颈内动脉床的阻抗谱为反射少得多的低阻抗类型。在对组织质量的阻抗进行标准化后，颈内动脉床的电阻水平变为17.44±2.91×10⁶kN·m⁻⁵·s·100g⁻¹，颈外动脉床的电阻水平变为85.41±4.75×10⁶kN·m⁻⁵·s·100g⁻¹。因此，狗与人之间颈总动脉输入阻抗的差异是由于颈内动脉和颈外动脉灌注组织的相对质量不同，而不是由于这两个物种外周床特征的差异。
