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42. 发明授权

US4610256A Pressure transducer 失效
标题翻译：压力传感器
公开(公告)号：US4610256A
公开(公告)日：1986-09-09
申请号：US654373
申请日：1984-09-25
申请人： William D. Wallace
发明人： William D. Wallace
IPC分类号： A61B5/0215 , G01L9/00 , A61B5/02
CPC分类号： G01L19/143 , A61B5/0215 , G01L19/003 , G01L19/0038 , G01L19/0084 , A61B2562/0247
摘要： A pressure transducer which includes a novel apparatus and method for calibrating a pressure transducer to a monitor used in connection with an indwelling catheter to monitor a patient's blood pressure. The pressure transducer includes a transducer diaphragm disposed within a housing cavity. A manometer and a syringe are connected so as to be in communication with the transducer cavity. By partially withdrawing the plunger of the syringe, the pressure in the transducer cavity is reduced, thereby establishing a pressure drop equal to that measured by the manometer across the transducer diaphragm, thus facilitating calibration of the pressure measurement system. Inasmuch as the indwelling catheter is isolated from the pressure calibration apparatus, the methods and apparatus of the present invention avoid any risk of introducing air bubbles or microorganisms into the indwelling catheter.
摘要翻译：一种压力传感器，其包括用于将压力换能器校准到与留置导管结合使用以监测患者的血压的监视器的新型装置和方法。压力传感器包括设置在壳体腔内的换能器膜片。压力计和注射器被连接成与换能器腔连通。通过部分地抽出注射器的柱塞，换能器空腔中的压力减小，从而建立与通过换能器隔膜的压力计所测量的压降相等的压降，从而便于校准压力测量系统。由于留置导管与压力校准装置隔离，所以本发明的方法和装置避免了将气泡或微生物引入留置导管的风险。

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