公开(公告)号：WO1991018277A1

公开(公告)日：1991-11-28

申请号：PCT/US1991003249

申请日：1991-05-10

Applicant: ALBION INSTRUMENTS

Inventor： ALBION INSTRUMENTS ,  MILES, Scott, D.

IPC: G01N21/15

CPC classification number: G01N21/15 ,  G01N21/65 ,  G01N2021/151 ,  G01N2021/391 ,  G01N2021/651 ,  G01N2021/8578

Abstract: A gas analysis cell (10) positioned within an optical resonant cavity in a gas analysis system is disclosed wherein the cell includes a flow (50A, 50B) of buffer gas which forms a 'dam', thereby protecting the optical elements (20-22) in the analysis system. The analysis cell includes an inlet (34) for introducing a gas sample (52) into the analysis chamber (26) of the cell. Two buffer gas inlet ports (40, 42), one on each end of the cell, are provided to introduce a flow of buffer gas (50) which is directed past optical elements (20-22) in the system adjacent the ends of the cell. Two ouput ports (44, 46) are located at the ends of the analysis chamber to remove the buffer gas and gas sample mixture. The flow (50) of buffer gas acts to confine the gas sample (52) within the analysis chamber and reduce adverse effects which occur when the gas sample comes in contact with the optical elements of the system. By providing a constant non-turbulent flow of gas adjacent the system optics, adverse changes in index of refraction are avoided, thus reducing beam steering and Schlieren effects which can occur when Brewster windows or other optics are used to constrain the gas sample within the analysis cell. The buffer gas flow in the analysis cell of the present invention eliminates the need for gas cell windows which have intrinsic losses. This in turn minimizes losses which cause lower circulating intracavity power and signal strength.

公开(公告)号：WO1989011245A1

公开(公告)日：1989-11-30

申请号：PCT/US1989001974

申请日：1989-05-09

Applicant: ALBION INSTRUMENTS

Inventor： ALBION INSTRUMENTS ,  COLEMAN, Dennis, L. ,  OWEN, Charles, V. ,  DE NEVERS, Noel

IPC: A61B05/08

CPC classification number: A61B5/083

Abstract: Described herein is a patient interfacing (10) for sampling the inspired and expired gases of a patient and removing moisture from the sample. In one embodiment of the present invention, a patient link (20) receives the gases from the patient's airway circuit (11) and a vaporization section (30) vaporizes condensed moisture in the sample. A separator section (40) allows the vaporized moisture component of the sample to exit the patient interfacing system (10) before the gas sample reaches the monitoring instrument (12). A filter (70) may also be utilized to prevent condensed moisture, particulates and liquids from entering the monitoring instrument (12). Thus, the patient interfacing system (10) of the present invention provides a reliable, cost effective and efficient means for delivering gas samples to a monitoring instrument (12) which reduces or prevents water condensation inside the gas analysis portion of the monitoring instrument (12).

Abstract translation: 这里描述的是用于对患者的启发和呼气的气体进行取样并从样品中除去水分的患者接口（10）。 在本发明的一个实施例中，患者连接件（20）接收来自患者气道回路（11）的气体，蒸发部分（30）蒸发样品中的冷凝水分。 在气体样品到达监测仪器（12）之前，分离器部分（40）允许样品的蒸发的水分成分离开患者接口系统（10）。 过滤器（70）也可用于防止冷凝的水分，微粒和液体进入监测仪器（12）。 因此，本发明的患者接口系统（10）提供了将气体样品输送到监测仪器（12）的可靠，成本有效和有效的方法，其减少或防止监测仪器（12）的气体分析部分内的水冷凝 ）。

公开(公告)号：WO1989003515A1

公开(公告)日：1989-04-20

申请号：PCT/US1988003394

申请日：1988-09-28

Applicant: ALBION INSTRUMENTS

Inventor： ALBION INSTRUMENTS ,  VAN WAGENEN, Richard, A. ,  GEISLER, Jeffrey, D. ,  GREGONIS, Donald, E. ,  COLEMAN, Dennis, L.

IPC: G01J03/44

CPC classification number: G01J3/44 ,  G01J3/4412 ,  G01N21/031 ,  G01N21/65 ,  G01N2021/391 ,  G01N2021/651

Abstract: The concentration of multiple polyatomic gases are determined by Raman light scattering. A gas sample is placed in a cell (26, 50) and a laser beam (18) passed through the cell (26, 50). A portion of the light scattered by the gas sample is detected by collection channels (60). Light scattered by the gas sample contains inelastic Raman and elastic scattered light. Each channel (60) contains a laser line rejection filter (216) which attenuates the elastic scattered laser signals and an interference filter (217) which is specific to the transmission of one or more specific Raman lines. Each interference filter (217) is selected to a specific wavelength which is characteristic of Raman scattering from a particular polyatomic gas. Optical signals representative of these specific Raman lines are sensed by optical detectors (219) and processed into simultaneous visual readouts indicative of the intensity and concentration of each of the polyatomic gas molecules present in the gas sample.