The frequent occurrence of a defective peripheral circulation in rheumatoid arthritis has now been well established since the early observations of Pemberton (1923). Moreover, many of the therapeutic measures employed in this and allied conditions result in an increased peripheral blood flow.After intramuscular injections of adrenocorticotropic hormone (ACTH) changes in the blood flow in the knee joint and an increase in the temperature of the fingers in cases of rheumatoid arthritis were reported by Janus (1950). Improved vasomotor activity after intravenous infusions of ACTH was shown by Beattie and Woodmansey (1953). Although Horwitz, Sayen, Naide, and Hollander (1951) found increased digital temperatures after intramuscular ACTH therapy, they were unable to demonstrate a similar effect with cortisone. We, however, had observed a positive effect after cortisone both on digital temperatures and on thermal response. Moreover, cortisone had earlier been shown plethysmographically by Hines, Wakim, Roth, and Kierland (1950) to produce an increased blood flow in the forearm and legs in cases of scleroderma, and more recently by Catchpole, Jepson, and Kellgren (1954) to cause increased digital blood flow in cases of rheumatoid arthritis.We are here reporting our work on cortisone and on certain other steroids, investigated not only because they have been administered to patients suffering from rheumatoid arthritis, but also because vascular effects have been attributed to some of them.Method The technique employed in these observations was similar to that already in routine use in this Unit, previously described by Woodmansey (1951) and Beattie and Woodmansey (1953). Briefly, it involved skin temperature measurements at various sites (the volar or plantar surfaces of the terminal segments of thumbs and great toes, and the forehead) during a preliminary period of at least 30 minutes, followed by further observations on the exposed limbs during the time of immersion of one leg in a hot-water bath maintained at 44°C. The actual temperatures were recorded with the instrument described in the previous papers. These procedures were carried out, under controlled conditions in a room maintained at a temperature of 18.5-19-55 C., before and after a course of treatment with the steroid.Skin temperature, according to Cooper, Cross, Greenfield, Hamilton, and Scarborough (1949) mirrors the rate of blood flow up to about 340 C. The thermal response involves the stimulation by returning warmed blood of the vasomotor centre in the hypothalamus, and the integrity of the sympathetic system on the efferent side, the resulting vasodilatation depending on inhibition of vasoconstrictor tone, which latter is more marked in the lower than in the upper limbs.
ResultsAltogether 57 patients (56 females and one male) were included in this survey, 43 suffering from rheumatoid arthritis and fourteen from osteoarthritis. They were investigated in five groups, each group receiving one of the following steroids: cortisone, testosterone, deoxycortic...