Monitor blood pressure in the chambers of the heart, in arteries, veins, or in the capillary bed. The Sphygmomanometer records the external pressure required to occlude an artery within a limb. Double cuff methods are used in the oscillometer and haemotonometer. Automated indirect blood pressure recorders are sometimes incorporated into other instruments monitoring temperature, respiration rate, and heart rate. To record the waveform of the arterial pressure a catheter or needle must be introduced into the artery and connected to an electrical pressure transducer.
