公开(公告)号：WO1996040337A1

公开(公告)日：1996-12-19

申请号：PCT/US1996008550

申请日：1996-06-03

Applicant: NELLCOR PURITAN BENNETT INCORPORATED

Inventor： NELLCOR PURITAN BENNETT INCORPORATED ,  RICHARD, Ron, F. ,  DIRKS, Aaron, J. ,  WILLIAMS, Stuart, P.

IPC: A61M16/00

CPC classification number: A61M16/0069 ,  A61M16/024 ,  A61M2016/0036 ,  A61M2016/0039

Abstract: A blower (14) pressurizes the system with fresh air, conduit (16) ducts such pressurized air to a standard nasal mask (18) which is fitted about the nose or a nasal pillow that is fitted to the nose and extends directly into the patient's nares. Port (19) continuously vents a small amount of air from the nasal mask or pillow in order to prevent moisture buildup and subsequent condensation therein. The port also prevents buildup of exhaled gases including CO2. The actual pressure within the system is controlled by relief valve (20) which vents superfluous air volume to the atmosphere. The position of the relief valve is in turn controlled by controller (24) pursuant to a number of different signals. Flow meter (26) provides information as to the volume of air inhaled by the patient, while pressure sensor (28) provides information as to the pressurization of the system at any given moment. The function of the controller is additionally subject to various parameters that are input such as through keyboard (30). The controller is also operative to control the position of valve (21) which is closed when relief valve (20) is opened and to tailor the output of blower (14) in relation to pressure demands. The system (12) monitors the tidal volume of each cycle and more particularly the sum of the tidal volumes over a given period of time to calculate the minute volume. The calculated value is compared with a target to determine whether an insufficient or an excessive volume of air is being respirated. In the event the actual minute volume exceeds the target value, the IPAP is gradually reduced such as by a small increment every few minutes. If, on the other hand, the actual minute volume is less than the target value, the IPAP is gradually increased, again by a small increment every few minutes.

Abstract translation: 鼓风机（14）用新鲜空气对系统进行加压，导管（16）将这种加压空气引导到标准鼻罩（18），该鼻罩面罩安装在鼻子上，或鼻枕被安装在鼻子上，并直接延伸到患者体内 鼻孔。 端口（19）从鼻罩或枕头连续排出少量空气，以防止水分积聚和随后的冷凝。 港口还可以防止包括二氧化碳在内的呼出气体的积聚。 系统内的实际压力由安全阀（20）控制，泄压阀将多余的空气量排放到大气中。 安全阀的位置依次由多个不同的信号由控制器（24）控制。 流量计（26）提供关于由患者吸入的空气的体积的信息，而压力传感器（28）在任何给定时刻提供关于系统加压的信息。 控制器的功能另外受到输入的诸如通过键盘（30）的各种参数的影响。 控制器还可操作以控制当安全阀（20）打开时关闭的阀（21）的位置并且相对于压力需求来调节鼓风机（14）的输出。 系统（12）监测每个循环的潮气量，更具体地，监测在给定时间段内的潮气量的总和以计算微小体积。 将计算值与目标进行比较，以确定是否呼吸不足或过量空气。 在实际分钟体积超过目标值的情况下，IPAP逐渐减少，例如每几分钟增加一个小的增量。 另一方面，如果实际的微小体积小于目标值，则IPAP逐渐增加，每隔几分钟就会逐渐增加一个小的增量。