1970 Volume 33 Issue 3-4 Pages 67-90
As a part of systematic studies at the author's institute on the effect of gradually warming partial bathing (Sugiyama) upon functions of the circulatory system, the response of blood pressure, phonocardiogram, electrocardiogram and digital plethysmogram to this bathing was compared with their response to whole-body steam bathing. The results are as follows.
1) In whole-body steam bathg a sharp, transient rise followed by a rapid fall in blood pressure was commonly observed both during and after completion of bathing. Such a change was particularly remarkable in cases with hypertension, and in these instances blood pressure resumed the pre-bathing hypertensive level in a comparatively short time after bathing. In gradually warming partial bathing, on the other hand, blood pressure fell gradually and mildly without showing an initial rise, ahd maintained a lowered level for a fairly long time. These and previous experimental results indicate that bathing has influence on blood pressure in the ascending order of severity of gradually warming partial bathing, long bathing in lukewarm carbon-dioxated water, hightemperature whole-body bathing of conventional mode and whole-body steam bathing.
2) The effect of gradually warming partial bathing on intracardial hemodynamics, as revealed by phono-electrocardiography, was apparently more gradual and milder in contrast with that of whole-body steam bathing: in the former case the load on the auriculo-ventricular and the semilunar valves varied less abruptly and less vigorously, and the cardiac output increased more gradually.
3) The intracardial hemodynamic effect of gradually warming partial bathing tended to be alleviated during repeated treatments with this bathing. Particularly in patients with hypertension who initally had responded to the bathing with rather prominent changes in phono-electrocardiogram, the changes became less remarkable as the treatment progressed and eventually approximated to those of normotensive subjects.
4) Plethysmographic observation disclosed that the response of peripheral vessels to bathing, i. e. a decrease in vascular tone resulting in an increase in peripheral blood flow, was gradual, moderate and long-durating in the case of gradually warming partial bathing, whereas this was rapid, intensive and short-durating in whole-body steam bathihg.
5) Such an effect of bathing on peripheral hemoynamics also tended to become less intensive during repeated treatments with gradually warming partial bathing. This was particularly true in hypertensive patients, with progress of the treatment the plethysmographic changes in bathing gradually resembling those of normotensive subjects.