James A. McEwen,Michael Jameson,William K.W. Cheung,Michael A. Gebert
申请号：
US13574413
公开号：
US20130190806A1
申请日:
2010.01.22
申请国别(地区):
US
年份:
2013
代理人:
摘要：
An apparatus for estimating the distance of penetration (66) of arterial blood into a portion of a patient limb (6) encircled by a tourniquet cuff (2) comprising a cuff (2), a physiologic transducer (24), estimation means (74) and control means (70). The physiologic transducer (24) is associated with the cuff (2) and adapted for sensing a physiologic parameter indicative of penetration of arterial blood into the limb portion (6) encircled by the cuff (2) while blood flow past the limb portion (6) is stopped. The estimation means (74) responds to an output of the physiologic transducer (24) and produces an estimate of penetration of arterial blood past the proximal edge (60) of the cuff (2). The control means (70) responds to the estimation means (74) for facilitating the control of the pressure applied to the patient limb (6) by the cuff (2) to stop the flow of blood in the artery (58) by maintaining the estimated distance of penetration (66) near a selected penetration distance.
