公开(公告)号：WO1997020500A1

公开(公告)日：1997-06-12

申请号：PCT/US1996019054

申请日：1996-11-27

Applicant: PULMONARY INTERFACE, INC. ,  IMPCO TECHNOLOGIES, INC.

Inventor： PULMONARY INTERFACE, INC. ,  IMPCO TECHNOLOGIES, INC. ,  TILLOTSON, Paul, J. ,  TAYLOR, Thomas, T. ,  TAJCHMAN, Timothy, R. ,  BINGEL, Ronald, D., Sr.

IPC: A61B05/087

CPC classification number: G01P13/04 ,  A61B5/0878 ,  G01F1/6847

Abstract: A device (12) for sensing the respiratory air of a patient. The device includes a venturi tube (18) through which the patient inspires and expires, the tube having a constricted midportion (20). The tube also has an inspiration orifice (48), an expiration orifice (46), and a central orifice therebetween. An air mass flow sensor is positioned in the tube. A flow direction housing (24) is attached to the tube and has a channel (74) with an inspiration portion, an expiration portion, and a central portion therebetween. The housing also has an inspiration opening (68) providing communication between the tube inspiration orifice (88) and an end portion of the inspiration channel away from the central channel portion, an expiration opening (66) providing communication between the tube expiration orifice (88) and an end portion of the expiration channel portion, and a central opening (64) providing communication between the tube central orifice (44) and the central channel portion. This causes a flow of a portion of the respiratory air which the patient inspires to pass through the tube inspiration orifice and flow through the inspiration channel portion to the housing central opening, and a flow of a portion of the respiratory air which the patient expires to pass through the tube expiration channel portion to the housing central opening for return to the venturi tube at the tube constricted portion. A flow direction sensor is positioned in the inspiration channel portion and a flow direction sensor is positioned in the expiration channel portion to produce outputs responsive to the flow of respiratory air through the inspiration and expiration channel portions for determining if the respiratory air flowing through the venturi tube is inspired or expired air.

Abstract translation: 一种用于感测患者呼吸空气的装置（12）。 该装置包括文氏管（18），患者启动并过期，该管具有收缩的中间部分（20）。 管还具有吸气孔（48），呼气孔（46）和其间的中心孔。 空气质量流量传感器位于管中。 流动方向壳体（24）附接到管并且具有在其间具有吸气部分，呼出部分和中心部分的通道（74）。 所述外壳还具有提供管吸气孔（88）与抽吸通道的远离中心通道部分的端部之间的连通的吸气口（68），提供管用通孔（88）之间连通的呼气开口（66） ）和所述呼出通道部分的端部，以及提供所述管中心孔（44）和所述中心通道部分之间的连通的中心开口（64）。 这导致患者启动的呼吸空气的一部分流动通过管吸气孔并流过吸气通道部分到壳体中心开口，并且患者到达的呼吸空气的一部分流动到 通过管用通道部分到壳体中心开口，以便在管收缩部分返回文丘里管。 流动方向传感器定位在吸气通道部分中，并且流动方向传感器位于呼出通道部分中以产生响应于呼吸空气通过吸气和呼出通道部分的流动的输出，用于确定流经文丘里管的呼吸空气 管是启发或过期的空气。