ANESTHESIA DEVICE AND PROCESS FOR OPERATING AN ANESTHESIA DEVICE

• US 20110061650A1
• Filed: 07/29/2010
• Published: 03/17/2011
• Est. Priority Date: 09/16/2009
• Status: Active Grant

• Current Assignee: Dragerwerk AG & Company KGaA (FPS Vermögensverwaltung GmbH)
• Original Assignee: Drager Medical AG & Co KG (Dragerwerk AG)
• Inventors: HEESCH, Ralf
• Granted Patent: US 8,627,817 B2
• Time in Patent Office: Days
• US Class Current: 128/203.12
• CPC Class Codes: A61M 16/0066 Blowers or centrifugal pumps
• CPC Class Codes: A61M 16/009 Removing used or expired gases or anaesthetic vapours filtering, sterilising or disinfecting the exhaust air in drainage systems A61M1/784; bacterial filters in the expiratory path A61M16/1065
• CPC Class Codes: A61M 16/01 specially adapted for anaesthetising A61M16/104, A61M16/18 take precedence
• CPC Class Codes: A61M 16/0833 T- or Y-type connectors, e.g. Y-piece
• CPC Class Codes: A61M 16/085 Gas sampling
• CPC Class Codes: A61M 16/1015 using a gas flush valve, e.g. oxygen flush valve
• CPC Class Codes: A61M 16/202 electrically actuated
• CPC Class Codes: A61M 16/22 Carbon dioxide-absorbing devices ; Other means for removing carbon dioxidecartridges with absorbing substances for respiratory apparatus A62B19/00
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2016/0042 in the expiratory circuit
• CPC Class Codes: A61M 2016/1035 the anaesthetic agent concentration

Abstract

An anesthesia device and a process are provided with which a breathing gas, which is present in a breathing circuit and which is especially enriched with an anesthetic, can be removed rapidly and in a cost-effective manner. The breathing circuit comprises an inspiratory breathing gas duct and an expiratory breathing gas duct, for receiving an expired breathing gas, a Y-piece, which is designed as a Y-piece that can be closed, for connecting the inspiratory and expiratory breathing gas ducts with a patient. At least one breathing gas supply system introduces breathing gas into the breathing circuit. A breathing gas outlet duct is provided with a breathing gas outlet valve. A breathing gas reservoir intermediately stores breathing gas. A PEEP valve is arranged upstream of the breathing gas reservoir in the direction of flow of the breathing gas. A breathing gas delivery is arranged downstream of the breathing gas reservoir in the direction of flow of the breathing gas. An air inlet introduces ambient air into the breathing circuit. The air inlet is arranged between the PEEP valve and the breathing gas delivery. A control is provided at least for controlling the ambient air entering through the air inlet, the breathing gas delivery, the PEEP valve and the breathing gas outlet valve for removing breathing gases from the breathing circuit.

Claims

1. Anesthesia device comprising:

a breathing circuit including an inspiratory breathing gas duct and an expiratory breathing gas duct receiving an expired breathing gas;

a closable Y-piece for connecting the inspiratory breathing gas duct and expiratory breathing gas duct with a patient;

a breathing gas supply system introducing breathing gas into the breathing circuit;

a breathing gas outlet duct with a breathing gas outlet valve;

a breathing gas reservoir for intermediately storing breathing gas,

a PEEP valve arranged in the breathing circuit upstream of the breathing gas reservoir in a direction of flow of the breathing gas;

a breathing gas delivery means arranged in the breathing circuit downstream of the breathing gas reservoir in the direction of flow of the breathing gas;

an air inlet for introducing ambient air into the breathing circuit, wherein the air inlet is arranged between the PEEP valve and the breathing gas delivery means; and

a control means for controlling the ambient air entering through the air inlet, for controlling the breathing gas delivery means, for controlling the PEEP valve and for controlling the breathing gas outlet valve for removing breathing gases from the breathing circuit.

2. An anesthesia device in accordance with claim 1, wherein a sealing cone is provided for closing the Y-piece.

3. An anesthesia device in accordance with claim 1, wherein the air inlet is arranged downstream of the breathing gas reservoir in the breathing circuit.

4. An anesthesia device in accordance with claim 1, further comprising a first volume flow sensor provided in the breathing circuit in the expiratory breathing gas duct.

5. An anesthesia device in accordance with claim 4, further comprising a second volume flow sensor in the breathing circuit in the inspiratory breathing gas duct, wherein the Y-piece in a closed Y-piece state can be determined by forming a difference of the values of the first volume flow sensor and the second volume flow sensor.

6. An anesthesia device in accordance with claim 1, further comprising a CO₂ absorber provided in the breathing circuit arranged downstream of the breathing gas reservoir.

7. An anesthesia device in accordance with claim 1, further comprising a breathing gas measuring device for monitoring a concentration of anesthetic in the breathing gas, the breathing gas measuring device being arranged between the Y-piece and the air inlet.

8. A process for operating an anesthesia device, the process comprising the steps of:

providing a breathing circuit including a closable Y-piece, an inspiratory breathing gas duct and an expiratory breathing gas duct, the closable Y-piece connecting the inspiratory breathing gas duct and expiratory breathing gas duct with a patient;

providing a breathing gas supply system introducing breathing gas into the breathing circuit;

providing a breathing gas outlet duct with a breathing gas outlet valve;

providing a breathing gas reservoir for intermediately storing breathing gas;

providing a PEEP valve arranged in the breathing circuit upstream of the breathing gas reservoir in a direction of flow of the breathing gas;

providing a breathing gas delivery means arranged in the breathing circuit downstream of the breathing gas reservoir in the direction of flow of the breathing gas;

providing an air inlet for introducing ambient air into the breathing circuit, wherein the air inlet is arranged between the PEEP valve and the breathing gas delivery means;

providing a control device;

closing the Y-piece with the control device;

closing the PEEP valve with the control device;

opening the breathing gas outlet valve with the control device;

opening the air inlet with the control device; and

starting the breathing gas delivery means with the control device so that ambient air is drawn in by the breathing gas delivery means and breathing gas is delivered from the breathing circuit.

9. A process for operating an anesthesia device in accordance with claim 8, wherein a breathing gas volume is measured with a first volume flow sensor and/or a time is measured subsequent to starting the breathing gas delivery means.

10. A process for operating an anesthesia device in accordance with claim 9, wherein after reaching a predetermined breathing gas volume and/or a predetermined time, the breathing gas outlet valve is closed and the PEEP valve is opened.

11. A process for operating an anesthesia device in accordance with claim 10, wherein a breathing gas volume and/or time is measured.

12. A process for operating an anesthesia device in accordance with claim 11, wherein after reaching the predetermined breathing gas volume and/or the time, the process steps involving control with the control device for closing the Y-piece, closing the PEEP valve, opening the breathing gas outlet valve, opening of the air inlet and starting the breathing gas delivery device is started again or the Y-piece is opened and the air inlet is closed.

13. A process for operating an anesthesia device in accordance with claim 12, wherein a volume flow corresponds at least to a volume of a portion of the expiratory breathing gas duct between the PEEP valve and the port to the breathing gas reservoir.

14. A process for operating an anesthesia device in accordance with claim 8, wherein dry gas is fed into the breathing circuit from a central gas supply system, wherein the breathing gas delivery means is set such that half of the dry gas is sent through the inspiratory breathing gas duct.