US 6,308,706 B1 · Device and process for monitoring the respiration parameters of an artificial respiration system

Abstract

A device is disclosed for monitoring the respiration parameters of an artificial respiration system. The proposed device has a treatment device including a filter and/or heat-and moisture exchanger fitted in a respiration tube system and is based on evaluation by a monitoring unit of pressure and/or flow-rate values in the respiration system. Inside the respiration system, pressure sensors are provided upstream and downstream of a flow resistance in the treatment device and pressure sensors are provided upstream and downstream of another flow resistance suitable as a reference. The signals from the pressure sensors are fed to the monitoring unit which determines the respiration parameters from the pressure difference Δp3 above the flow resistance in the treatment device, the pressure difference Δp4 above the other flow resistance suitable as a reference within the respiration system, and from the time t.

Claims15

Dependent claims

A ventilation system comprising

(a) a ventilation tube system comprising a treatment device for creating a first flow resistance and a device selected from the group consisting of a filter and a heat and moisture exchanger;
(b) a monitoring unit for evaluating ventilation system quantities selected from the group consisting of pressure quantities and flow quantities;
(c) first and second pressure sensors located respectively upstream and downstream of the treatment device;
(d) means for creating a second flow resistance in series to the first flow resistance, said second flow resistance being suitable as a reference;
(e) third and fourth pressure sensors located respectively upstream and downstream of the means for creating a second flow resistance;
(f) whereby said pressure sensors feed signals to the monitoring unit, the monitoring unit calculating selected parameters derived from a first differential pressure across the first flow resistance and a second differential pressure across the second flow resistance as a function of time to determine the degree of permeability of the filter or exchanger.

3 more elements

A process for monitoring a ventilation system comprising a ventilation tubing system comprising a treatment device for creating a first flow resistance and a device selected from the group consisting of a filter and a heat and moisture exchanger, which comprises;

(a) providing a monitor for evaluating ventilation system quantities selected from the group consisting of pressure quantities and flow quantities;
(b) making a first pressure measurement by taking steps selected from the group consisting of (i) taking first and second pressure readings respectively upstream and downstream of the first flow resistance and (ii) taking a first differential pressure reading across the first flow resistance;
(c) creating a second flow resistance suitable as a reference;
(d) making a second pressure measurement for use as a reference by taking steps selected from the group consisting of (i) taking third and fourth pressure readings respectively upstream and downstream of the second flow resistance and (ii) taking a second differential pressure reading across the second flow resistance;
(e) calculating selected parameters derived from the first and second pressure measurements as a function of time to determine the degree of permeability of the filter or exchanger;
and
(f) taking a step selected from the group consisting of (i) displaying the selected parameters;
(ii) storing the selected parameters;
and (iii) comparing the selected parameters with predetermined thresholds and determining whether to trigger an alarm based on the comparison.

6 more elements

Dependencies are inferred from the claim text.

Device and process for monitoring the respiration parameters of an artificial respiration system

Life of this patent

Device and process for monitoring the respiration parameters of an artificial respiration system

Life of this patent

Abstract

Claims15