Abstract: The invention disclosed is a clamping device, particularly for use in conjunction with a conventional sphygmomanometer cuff and electronic stethoscope in order to obtain a blood pressure reading from a patient's arm through heavy overgarments or the like, the patient's arm not being directly accessible. The clamping device includes a pair of pivoting jaws each carrying pressure plates for exerting pressure on the patient's arm. The sphygmomanometer cuff is placed against the patient's arm over the overgarment and the clamping device holds the cuff firmly against the arm. A releaseable lock serves to maintain the clamping device in a working position.