Gundersen, Jorgen
April 1971
Angiology;Apr1971, Vol. 22 Issue 4, p191
Academic Journal
During recent years there has been an increasing interest in measuring the peripheral local blood pressure in the limbs for evaluation of arterial insufficiency. As fingers and toes are predisposed to gangrene it seems most justified to measure the blood pressure here. A special technique for this purpose was developed using minicuffs made for fingers and toes and mercury-in-rubber strain gauges for detection of pulse. The gauges were balanced on a Wheat-stones bridge and connected to a D-C amplifier in an ordinary ECG unit, which recorded even the pressure of the cuffs via a pressure transducer. For evaluation of the method simultaneous measurements of intraarterial blood pressure of the radial artery and that of the fingers were performed. In patients under 40 years of age there was a 90 per cent good agreement between systolic intraarterial and digital pressure. In the remaining 10 per cent the digital blood pressure is from 5-15 mm lower than the intraarterial pressure. In patients more than 40 years of age only 50 per cent showed a good correlation while the other 50 per cent had a systolic finger pressure ranging around the mean value between systolic and diastolic arm pressure. When measuring the blood pressure of the toes in patients with arterial insufficiency the following results were obtained: In limbs with intermittent claudication the blood pressure of the toes was about half the systolic blood pressure of the arm. In limbs with imminent gangrene the blood pressure varied between zero and 30 mm. In newborn infants measurements of digital blood pressure seems to be the most simple and reliable way of measuring blood pressure.


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