J.Jpn. Surg. Soc.. 61(7): 959-970, 1960

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Original article

HEMODYNAMIC CHANGES IN CIRTAIN ORGANS BY SPINAL ANESTHESIA FOLLOWING GENERAL ANESTHESIA

In order to find clearly hemodynamic changes in cirtain organ, I performed experimental and clinical study. Experimental study was performed on dogs using an electromagnetic flowmeter and clinical study was performed on 27 cases by the indirect method.
The cerebral, splanchnic and renal blood flow is redused nearly half in volume at 3～5 minutes after application of spinal anesthesia, then, the blood flow increases gradually holding the blood pressure above 80 mmHg, and it returns to normal within 15～30 minutes.
General anesthesia using ether usually causes a slight decrease of blood flow to these organs. A marked decrease is seen if a large amount of ether is inhaled contrarily, there is a slight increase after 3～5 minutes if spinal anesthesis is carried out under the surgical stage of general anesthesia.
Consequently, spinal anesthesia can be done without a critical decrease of blood flow in these organs.
Spinal anesthesia done in the surgical stage of general anesthesia avoides not only the shock which follows spinal anesthesia alone but also diminishes complications of general anesthesia for the quantity of its agents can be redused.
(Author's abstract)

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