Patent ID: 9259545
Filing Date: 2016-02-16
CPC Classification: A61M

Claim Text:
1. A process for checking a function of a respiration system comprising a patient port, an inspiration branch, which has an inspiration branch first end and an inspiration branch second end as well as an inspiration branch nonreturn valve, which opens when pressure on a side of the inspiration branch nonreturn valve facing the inspiration branch second end is above pressure on a side of the inspiration branch nonreturn valve facing the inspiration branch first end, wherein the inspiration branch first end is connected to the patient port, with an expiration branch, which has an expiration branch first end and an expiration branch second end as well as an expiration branch nonreturn valve, which opens when pressure on a side of the expiration branch nonreturn valve facing the expiration branch first end is above pressure on the side of the expiration branch nonreturn valve facing the expiration branch second end, wherein the expiration branch second end is connected to the patient port, with a rebreathing line, which connects the inspiration branch second end to the expiration branch second end, with a reservoir, which has a variable volume with a maximum volume and which is connected to a reservoir port in the rebreathing line, with an actuatable control valve, which is provided in the rebreathing line between the expiration branch second end and the reservoir port, with a pressure sensor, which is connected to the rebreathing line adjacent to the reservoir port, and with a control unit, which is connected to the actuatable control valve and to the pressure sensor, the process comprising the steps of: closing the actuatable control valve for a preset inspiration time; opening the actuatable control valve for a preset expiration time; providing a value as output via the pressure sensor, which is connected to the rebreathing line adjacent to the reservoir port; detecting said value sent by the pressure sensor, with the actuatable control valve opened during an expiration phase; comparing the value detected with a preset threshold value; and generating an error message when the value detected exceeds the preset threshold value.