CN-116392682-B - Assembly and method for connecting a patient-side coupling unit to a source or sink of a gas mixture

CN116392682BCN 116392682 BCN116392682 BCN 116392682BCN-116392682-B

Abstract

The present invention relates to a connection assembly and a method for connecting a patient-side coupling unit with a source or sink of a gas mixture comprising oxygen. The connection assembly comprises a valve assembly having a first valve (40.1) and a second valve (40.2). A source side fluid guide unit (24) establishes a fluid connection between the source or sink and the valve assembly. A patient-side fluid guiding unit (25) establishes a fluid connection between the patient-side coupling unit and the valve assembly. The two valves are connected in parallel and both are arranged between the two fluid guiding units. The gas mixture flows from the source through the first valve and/or the second valve to the patient-side coupling unit or vice versa through the first valve and/or the second valve to the sink. The control pressure is set at each valve separately. The time course of the actual volume flow downstream of the valve assembly thus follows a preset time course.

Inventors

H-U. Hansman
S. Schroeder
J. Brundmann

Assignees

德尔格制造股份两合公司

Dates

Publication Date: 20260512
Application Date: 20230105
Priority Date: 20220106

Claims (15)

1. A connection assembly (110, 120) for -Bringing a source (8) or sink of the gas mixture into communication with -A patient-side coupling unit (9) is connected, Wherein the patient-side coupling unit (9) is at least temporarily connected or connectable to the patient (Pt), Wherein the connection assembly (110, 120) comprises: a source-side fluid guiding unit, -A patient-side fluid guiding unit, and A valve assembly (4.1, 4.2) having a first valve (40.1) and a second valve (40.2), Wherein the source-side fluid guiding unit is capable of or at least temporarily establishing a fluid connection between the source (8) or the sink and the valve assembly (4.1, 4.2), Wherein the patient-side fluid guiding unit is capable of or at least temporarily establishing a fluid connection between the patient-side coupling unit (9) and the valve assembly (4.1, 4.2), Wherein the first valve (40.1) and the second valve (40.2) of the valve assembly (4.1, 4.2) -Parallel connection, and Both arranged between the source-side fluid guide unit and the patient-side fluid guide unit, Wherein the connection assembly (110, 120) is designed such that the gas mixture -In the direction of flow from the source (8) to the patient-side coupling unit (9) or from the patient-side coupling unit (9) to the sink, and Flow through the first valve (40.1) and/or through the second valve (40.2) while proceeding from a fluid guiding unit arranged upstream of the valve assembly (4.1) with respect to the flow direction into a fluid guiding unit arranged downstream of the valve assembly (4.1, 4.2), Wherein the connection assembly (110, 120) is designed, -Setting control pressures at a first valve (40.1) and a second valve (40.2) of the valve assembly (4.1, 4.2), respectively, and Controlling or regulating the volumetric flow through and/or the pressure in the downstream arranged fluid guiding unit by setting a control pressure at each valve, The aim in the control or regulation is, among other things, to follow a predetermined time profile by the actual volume flow of the downstream-arranged fluid-conducting unit and/or the time profile of the pressure in the downstream-arranged fluid-conducting unit.
2. The connection assembly (110, 120) according to claim 1, It is characterized in that the method comprises the steps of, A pre-pressure is present at each valve of the valve assembly (4.1, 4.2), respectively, and the respective pre-pressure depends on the pressure in the fluid guiding unit arranged upstream, Wherein the volume flow (Vol') through the fluid guiding unit arranged downstream depends on the respective pre-pressure and the respective control pressure present at each valve.
3. The connection assembly (110, 120) according to claim 1 or 2, It is characterized in that the method comprises the steps of, Each valve of the valve assemblies (4.1, 4.2) comprises a valve body and a valve body seat respectively, Wherein the valve body seat can be penetrated by fluid, Wherein the valve body is movable relative to the valve body seat.
4. The connection assembly (110, 120) according to claim 3, It is characterized in that the method comprises the steps of, The cross-sectional area of the valve body seat of the first valve (40.1) is smaller than the cross-sectional area of the valve body seat of the other valve.
5. The connection assembly (110, 120) according to claim 1 or 2, It is characterized in that the method comprises the steps of, At least one valve (40.1, 40.2) is associated with a controllable fluid delivery unit (44.1,44.2), Wherein the fluid delivery unit (44.1,44.2) is designed to set the control pressure present at the associated valve (40.1, 40.2), and Wherein the connection assembly (110, 120) is designed to set a control pressure at the valve (40.1, 40.2) by actuating a fluid delivery unit (44.1,44.2) associated with the valve (40.1, 40.2).
6. The connection assembly (110, 120) according to claim 5, It is characterized in that the method comprises the steps of, The connection assembly (110, 120) includes at least one volumetric flow sensor (6.1,6.1.1,6.1.2,6.1.3), Wherein the volume flow sensor (6.1,6.1.1,6.1.2,6.1.3) is designed to measure a measure of the volume flow through the fluid-conducting unit (24) arranged upstream to the valves arranged in parallel, Wherein the connection assembly (110, 120) is designed to operate the fluid delivery unit (44.1,44.2) as a function of the measured volumetric flow rate to each valve arranged in parallel.
7. The connection assembly (110, 120) according to claim 1 or 2, It is characterized in that the method comprises the steps of, Each valve includes: the junction point of the front pressure side, -A junction point of the rear pressure side, and The coupling site of the pressure side is controlled, Wherein the junction point of the front pressure side is in fluid connection with the fluid guiding unit arranged upstream, Wherein the junction point of the rear pressure side is in fluid connection with a fluid guiding unit arranged downstream, and Wherein at the junction point on the control pressure side there is a control pressure settable or to be set at each valve.
8. The connection assembly (110, 120) according to claim 7, It is characterized in that the method comprises the steps of, The leading pressure side junction of a first one (40.1) of the valves is fluidly connected to the control pressure side junction of a second one (40.2) of the valves.
9. The connection assembly (110, 120) according to claim 8, It is characterized in that the method comprises the steps of, The connection assembly (110, 120) comprises, in addition to the second valve (40.2), a third valve having a control pressure side coupling point, Wherein three valves are connected in parallel and arranged between the source-side fluid guide unit and the patient-side fluid guide unit, and Wherein the upstream pressure-side connection point of the second valve (40.2) is in fluid connection with the control pressure-side connection point of the third valve.
10. The connection assembly (110, 120) according to claim 8 or claim 9, It is characterized in that the method comprises the steps of, The first valve (40.1) has associated therewith a controllable fluid delivery unit, Wherein the fluid delivery unit is designed to set a control pressure present at the first valve (40.1), and The connection assembly is designed such that the control pressure present at the second valve (40.2) is set in dependence on the pilot pressure and the control pressure present at the first valve (40.1).
11. The connection assembly (110, 120) according to claim 2, It is characterized in that the method comprises the steps of, The pre-pressure is equal to the pressure in the fluid guiding unit arranged upstream.
12. The connection assembly (110, 120) according to claim 5, It is characterized in that the method comprises the steps of, The fluid delivery unit (44.1,44.2) is a pump.
13. A supply assembly for supplying a patient-side coupling unit (9) with a gas mixture comprising oxygen, Wherein the supply assembly comprises: -a conveying unit (2), and -A connection assembly (110, 120) according to any of the preceding claims, Wherein the delivery unit (2) is designed to deliver the gas mixture to the patient-side coupling unit (9) in such a way, So that the gas mixture -From a source (8) of said gas mixture First through the source-side fluid guiding unit, -Then through said valve assembly (4.1), and -Then through the patient side fluid guiding unit -To the patient-side coupling unit (9).
14. The supply assembly according to claim 13, It is characterized in that the method comprises the steps of, The feed assembly includes a mixing point, and The supply assembly is designed to produce the gas mixture in the mixing point by mixing at least two gas components, Wherein the mixing point serves as a source of the gas mixture.
15. An exhaust assembly for exhausting a gas mixture comprising oxygen from a patient-side coupling unit (9), Wherein the expelling assembly comprises a connecting assembly (110, 120) according to any one of claims 1 to 12, Wherein the discharge assembly is designed such that, So that the gas mixture -Coupling a unit (9) from the patient side First through the patient-side fluid guiding unit, -Then through said valve assembly (4.2), and -Then through said source-side fluid guiding unit -Flow to sink.

Description

Assembly and method for connecting a patient-side coupling unit to a source or sink of a gas mixture Technical Field The present invention relates to an assembly and a method for connecting a patient-side coupling unit with a source and/or sink (Senke) of a gas mixture. The gas mixture includes oxygen. The patient-side coupling unit is at least temporarily connected to the patient or can be connected to the patient. The assembly according to the invention and the method according to the invention may be used for artificial respiration of a patient. The patient-side coupling unit is arranged in or at the patient's body. The gas mixture flows from the at least one source through the inhalation channel to the patient-side junction unit. The expired gas flows out of the patient-side coupling unit through the exhalation passageways. Background It is desirable to regulate or at least control the volume flow through the inhalation and/or exhalation channels to the patient-side junction unit and/or the pressure in the inhalation and/or exhalation channels. The objective in performing such a regulation (closed-loop control) or control (open-loop control) is that the actual time course of the volume flow and/or the pressure follow a preset setpoint time course. In this application, the invention is used in inhalation channels and/or exhalation channels. Disclosure of Invention The present invention aims to provide a connection assembly and a method for connecting a patient-side coupling unit with a source or sink of a gas mixture, wherein the gas mixture flows from the source to the patient-side coupling unit via an inhalation channel and/or from the patient-side coupling unit to the sink via an exhalation channel, and wherein the actual time course of the volume flow or pressure can be better regulated than in known connection assemblies and methods. The invention is achieved by a connection assembly according to the invention and a connection method according to the invention. Advantageous designs of the connection assembly are also advantages of the connection method according to the invention, as far as this is relevant, and vice versa. The connection assembly according to the invention is capable of connecting a patient-side coupling unit with a source or sink of a gas mixture. The gas mixture preferably comprises oxygen. Optionally, the gas mixture additionally comprises at least one anesthetic agent. The gas mixture may also be air exhaled by the patient and additionally contain carbon dioxide. Alternatively, a design of the connection assembly according to the invention enables the patient-side coupling unit to be connected both to the source and to the sink. It is possible that the same appliance serves as both a source and sink. The patient-side coupling unit is at least temporarily connected to the patient or can be connected to the patient. In particular, the patient-side coupling unit is arranged in or at the patient's body. The connection assembly according to the invention comprises a valve assembly and two fluid guiding units, namely a source-side fluid guiding unit and a patient-side fluid guiding unit. A "fluid guiding unit" is understood to be a member capable of guiding a fluid along a trajectory and ideally completely preventing the fluid from leaving the trajectory. Rigid tubing and flexible hose are two examples of fluid guiding units. The fluid guiding unit may be a dual lumen hose. The source-side fluid guide unit establishes a fluid connection between a source or sink of the gas mixture and the valve assembly, or is capable of establishing such a fluid connection. The patient-side fluid guiding unit establishes a fluid connection between the patient-side coupling unit and the valve assembly, or is capable of establishing such a fluid connection. The two fluid guiding units are preferably connected in series. The gas mixture flows in a flow direction from the source to the patient-side coupling unit or from the patient-side coupling unit to the sink. The terms "upstream" and "downstream" refer to this flow direction. One fluid guiding unit is arranged upstream of the valve assembly and the other fluid guiding unit is arranged downstream of the valve assembly. Whether the source-side fluid guiding unit or the patient-side fluid guiding unit is arranged upstream depends on the flow direction and thus on the application of the invention. The connection assembly according to the invention further comprises a valve assembly. The valve assembly includes a first valve and at least one second valve, optionally a plurality of second valves. A "valve" is understood to mean a component through which a fluid can flow, wherein the component is able to vary the volumetric flow rate of the fluid through the valve within a structurally defined range and generally prevents it in particular entirely. The valve may vary the volumetric flow rate in stages or continuously. "volumetric flow" is a measure of the vo