TUBE SYSTEM FOR VENTILATION APPLIANCES

• US 20090050153A1
• Filed: 11/09/2006
• Published: 02/26/2009
• Est. Priority Date: 12/16/2005
• Status: Active Grant

• Current Assignee: Hamilton Medical AG (Hamilton Company)
• Original Assignee: Hamilton Medical AG (Hamilton Company)
• Inventors: Brunner, Josef
• Granted Patent: US 8,181,649 B2
• Time in Patent Office: Days
• US Class Current: 128/204.230
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/08 Bellows; Connecting tubes having means for taking samples G01N1/22; Water traps; Patient circuits
• CPC Class Codes: A61M 16/0833 T- or Y-type connectors, e.g. Y-piece
• CPC Class Codes: A61M 16/107 in the inspiratory path
• CPC Class Codes: A61M 16/16 Devices to humidify the respiration air A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/204 used for inhalation control
• CPC Class Codes: A61M 16/205 used for exhalation control
• CPC Class Codes: A61M 2016/0036 in the breathing tube and used in both inspiratory and expiratory phase
• CPC Class Codes: A61M 2205/15 Detection of leaks

Abstract

The invention relates to a three-arm tube system (11) for a ventilation appliance (13) suitable for invasive ventilation. Such a ventilation appliance comprises an active inhalation valve and an active exhalation valve (29). The tube system (11) comprises an inhalation tube arm (17), an exhalation tube arm (27) and a ventilation tube arm (37) for attachment to a mask (57), and also a flow sensor (23). According to the invention, a defined leakage (39) is established in the ventilation tube (37), and the flow sensor (23) is arranged between leakage (39) and mask (57). The invention further relates to a ventilation appliance having such a tube system, and to a method for operating a ventilation appliance.

Claims

1. A three-arm tube system for a ventilation appliance suitable for invasive ventilation, wherein the ventilation appliance comprises an active inhalation valve and an active exhalation valve comprising:

an inhalation tube arm configured for connecting to an exhalation valve of a ventilation appliance;

an exhalation tube arm configured for connecting to the exhalation valve of the ventilation appliance;

a ventilation tube arm configured for connecting to a mask or a tubus;

a flow sensor configured to be arranged on the ventilation tube arm for measuring an inhalation volume and an exhalation volume; and

a defined leakage in the ventilation tube arm

the flow sensor configured to be arranged between the leakage and the mask, or the tubus.

2. The tube system according to claim 1, wherein the tube system comprises at least one of an inhalation tube, of an inhalation tube set, an exhalation tube, an exhalation tube set, a Y piece, a ventilation tube, a ventilation tube set of an open one-tube system, a flow sensor, a connecting tube, a mask and a tubus.

3. The tube system according to claim 1, wherein the flow sensor is comprised of a housing having a gas inlet nozzle and a gas outlet nozzle, the interior of the housing divided into two zones of the inlet nozzle and the outlet nozzle by a baffle membrane, and a pressure measuring device, or a connection to a pressure measuring device at each of these zones.

4. The tube system according to claim 3, wherein the baffle membrane is comprised of an elastic material having an opening therein, and a one piece damper corresponding to the shape and size of the opening connected to the baffle membrane in the manner of a hinge-type connection.

5. The tube system according to claim 4, wherein an edge of the opening extends divergently away from the hinge-type connection and has a directional change at a distance to the hinge-type connection in order to form a point of the lowest width of the opening opposite to the hinge-type connection.

6. The tube system according to claim 3, wherein the damper pivots about the hinge-type connection, and can be pivoted in front of the opening ending in the zone on the outflow side in case of a high gas throughput.

7. The tube system according to claim 3, wherein a single damper and a single opening are included in the baffle membrane.

8. The tube system according to claim 4, wherein a shape and an elasticity of the damper is configured such that a resistance of the opening is constant across a large throughput range.

9. A ventilation appliance suitable for invasive ventilation, comprising:

an active exhalation valve and an active inhalation valve, and a three-arm tube system for connecting the inhalation valve and the exhalation valve to a patient'"'"'s mask, or a tubus, and a flow sensor to be arranged adjacent to a patient,

a defined leakage in a ventilation tube arm directed toward the patient, and the flow sensor arranged between the leakage and the mask, or the tubus.

10. A method for operating a ventilation appliance, comprising:

supplying ventilation air to a ventilation tube and a ventilation mask adjacent to a patient'"'"'s side, or to a tubus with a ventilation appliance via an actively controlled inhalation valve and an inhalation tube,

releasing exhalation air via the ventilation tube, an exhalation tube, and an actively controlled exhalation valve,

monitoring a breathing frequency and a breathing volume with the flow sensor on the patient'"'"'s side,

controlling a ventilation pressure, end expiratory pressure, ventilation frequency and volume of ventilation air based on parameters supplied by the flow sensor, wherein any leakages possibly present in the tube system are quantifiably determined by a flow quantity measurement in the ventilation appliance, and a flow quantity measurement by means of the flow sensor on the patient'"'"'s side, and are compensated by the ventilation appliance,

providing a defined leakage in the ventilation tube on a side of the flow sensor facing away from the patient, and

pressing out any gas present in the ventilation tube with the ventilation appliance during a breathing pause between an end of an exhalation phase and a beginning of an inhalation phase by the leakage.

14. The method of claim 10, further comprising using an open single tube system in conjunction with a Y piece, an inhalation tube, and an exhalation tube on the ventilation appliance, having an actively controlled inhalation valve and an actively controlled exhalation valve.

15. The method of claim 14, wherein the flow sensor is arranged on the single tube system adjacent to the patient.

11. A method for the mechanical ventilation of a patient, having a ventilation appliance suitable for invasive ventilation, comprising:

monitoring a breathing frequency, ventilation pressure, an end expiratory pressure and a ventilation volume with a flow sensor on the patient'"'"'s side, controlling the ventilation pressure, the ventilation volume, and the end expiratory pressure in a patient-oriented manner based on parameters detected by the flow sensor, and with a gas mixer of the ventilation appliance,

compensating for any leakages present by actively conrolling the gas mixer, the inhalation valve, and the exhalation valve

providing a defined leakage on a side facing away from the patient of the flow sensor in the ventilation tube adjacent to the patient, and

partially releasing the exhalation air via the leakage.

12. The method of claim 11, further comprising using an open single tube system in conjunction with a Y piece, an inhalation tube, and an exhalation tube on the ventilation appliance, having an actively controlled inhalation valve and an actively controlled exhalation valve.

13. The method of claim 12, wherein the flow sensor is arranged on the single tube system adjacent to the patient.