811-B 811-B
Non directional Doppler. If you will not be using the doppler close to the cautery, we recommend model 811-B. It does not incorporate the cautery suppressor which sometimes confuses the untrained user. ...more more
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811-BL 811-BL
Non directional Doppler, model 811-BL has all the features of the high-frequency part of model 915-BL. It cannot be used to detect an air embolus in the heart. It is used primarily for difficult systolic pressure measurements and with a pencil probe ...more more
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