反射式光電容積脈波に関する研究—特に末梢血管疾患に就ての観察

Reflexion photoelectric plethysmogram in cases of peripheral vascular diseases

I．序論

　種々の疾患について，容積脈波を記録し，検討を加え，診断及び治療に利用するということは，従来から多くなされて来ている^1）2）3）。

　この場合，多くは，透過式光電容積脈波計が使用されており，反射式光電容積脈波計を用いて，それを行なつたものは少ない。著者は，血管系に疾患を有する症例について，反射式光電容積脈波計を用いて，特に皮膚血管に富む指理尖端部で，脈波の振幅のみならず，基線の動揺，外来刺激に対する血管反応を共に観察して，それぞれの疾患について，皮膚血管の態度を比較検討し，以下に報告するような知見を得た。

In about 60 cases of vascular disease, the amplitude of each pulse wave, the patterns of fluctuation of level, and the reaction of blood vessels for exogenous stimulation were in-vestigated with a use of reflexion photo-electric plethysmograph (R. P. P. G. ).

The results are summarized as follow:

1) In cases of Raynaud's disease, it was found that amplitude of each pulse wave is small, and the skin volume is increased (=dilatation of vessels) by an exogenous stimula-tion in the normal temperature or more higher temperature.

2) In cases of Buerger's disease, not only amplitudes of pulse waves in the indisposed extremity but also the fluctuations of level are small. The vasomotor reaction to the stimulation is obscure, but in the slight case dilatative.

3) In cases of occlusion of main artery, amplitudes of pulse waves of extremity with the occluded artery is small, and patterns of fluctuations of level are different between left and right side, and it was found on R. P. P. G. that vessels of indisposed side are in a state of vasospasm.

4) Aneurysm in the aorta shows no different pattern of fluctuations and pulse waves between both sides.

5) In diseases of the veins, amplitudes of pulse waves are small in the indisposed side. In the case of thrombus patterns of fluctuations are often different between left and right side.