ISSN:
1420-9071
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary The röntgenokymographical measurement of the speed of flow of the blood is based on the observation that, with the Stumpf kymograph, progressive movements taking place longitudinally can be recorded with the same ease as periodically recurrent, sinusoid movements. From the time during which the kymograph operates, which can be read off the time relay, and a few measurable stretches of the kymogram defined in detail in the text, the speed of propagation of a directed process of movement can be calculated. If a drop of iodized oil traverses the vessel at the same speed as the blood, the speed of flow of the blood can be ascertained. In numerous tests on models not only was the practicability of the method as such proved, but more specialized conditions of flow in tubes of irregular lumen or having aneurysmal sacculations were examined. In this connection vortical formations are very clearly shown. The particular merit of this new röntgenokymographical method (flow kymography) is seen to reside in the fact that the cycle of speeds can be followed along a considerable length of vessel, and also that circumscribed alterations in speed within the part-sections examined can be anatomically localized. Experiments in the use of the method on human subjects are in preparation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02164470
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