Immediate Capillary Stress Response

Abstract

Beside the previously described changes in capillary resistance occurring after a period of latency and lasting for several days or weeks, another type of response was found in both human subjects and experimental animals which sets in promptly and wears off within 4 hours. It is suggested that this be termed ‘immediate capillary stress response’ for the sake of distinction from the ‘late capillary response.’ Both immediate and late responses may show patterns of increase, decrease and biphasic reaction or there may be upon the same stress no change in the capillary resistance at all. Since the immediate capillary stress response, in contrast to the late response, appears in the adrenalectomized animal as well as in the intact animal, it is postulated not to be dependent on the adrenal cortex.