PATIENT BREATHING SYSTEM

• US 20090000621A1
• Filed: 06/20/2008
• Published: 01/01/2009
• Est. Priority Date: 06/28/2007
• Status: Active Grant

• Current Assignee: SunMed Group Holdings LLC
• Original Assignee: General Electric Company
• Inventors: Jarnefelt, Gustaf, Haggblom, Tom Jakob
• Granted Patent: US 8,186,347 B2
• Time in Patent Office: Days
• US Class Current: 128/205.120
• CPC Class Codes: A61M 16/0075 Bellows-type
• CPC Class Codes: A61M 16/0078 Breathing bags
• CPC Class Codes: A61M 16/0081 Bag or bellow in a bottle
• CPC Class Codes: A61M 16/01 specially adapted for anaesthetising A61M16/104, A61M16/18 take precedence
• CPC Class Codes: A61M 16/0875 Connecting tubes
• CPC Class Codes: A61M 16/1015 using a gas flush valve, e.g. oxygen flush valve
• CPC Class Codes: A61M 16/104 specially adapted for anaesthetics A61M16/18 takes precedence
• CPC Class Codes: A61M 16/105 Filters A61M16/047, A61M16/22 take precedence; water traps A61M16/08
• CPC Class Codes: A61M 16/1055 bacterial
• CPC Class Codes: A61M 16/12 by mixing different gases
• CPC Class Codes: A61M 16/22 Carbon dioxide-absorbing devices ; Other means for removing carbon dioxidecartridges with absorbing substances for respiratory apparatus A62B19/00

Abstract

A patient breathing system includes a ventilator that provides a driving gas flow to generate patient inspiration. The ventilator further includes a gas inlet for driving gas, the patient breathing system being connectable to a circle which includes an inspiratory hose and an expiratory hose connected to patient, through which circle expired gases can be circulated back to the patient. The circle further includes a fresh gas inlet, an arrangement for enabling the gas flow in a desired direction, a unit for removal of the exhaled carbon dioxide, and a ventilator port for the ventilator connection. The patient breathing system further includes an arrangement by which driving gas of the ventilator has been separated from the patient gases flowing in the circle.

Claims

1. A patient breathing system, comprising:

a ventilator configured to provide a driving gas flow to generate patient inspiration, the ventilator further including a gas inlet configured to drive gas,

wherein the patient breathing system is connectable to a circle comprising that includes an inspiratory hose and an expiratory hose connected that are each configured to connect to a patient, through which circle expired gases can be circulated back to the patient, thereby wherein the circle further comprises a fresh gas inlet, an arrangement for enabling the gas flow in a desired direction, a unit for removal of the exhaled carbon dioxide, and a ventilator port for the ventilator connection; and

an arrangement by which driving gas of the ventilator has been separated from the patient gases flowing in the circle,

wherein the arrangement separating the driving gas of the ventilator and the patient gases flowing in the circle is formed by an extended gas pathway between the circle and the ventilator.

2. The system according to claim 1, wherein the volume of the extended pathway (12, 13, 14) is greater than the tidal breathing volume of the patient.

3. The system according to claim 1, wherein the extended pathway (12) is formed by using a flexible hose.

4. The system according to claim 1, wherein the extended pathway is formed by using a rigid structure (13) having a waveform channel (14) in it.

5. The system according to claim 1, wherein the length of the extended pathway (12, 14) is at least about 3 m.

6. The system according to claim 5, wherein the extended pathway (12, 14) has a volume of at least 1500 ml.

7. The system according to claim 1, wherein the length of the extended pathway (12, 14) is at least about 4 m.

8. The system according to claim 7, wherein the extended pathway (12, 14) has a volume of at least 2000 ml.

9. The system according to claim 1, wherein the length of the extended pathway (12, 14) is about 6 m.

10. The system according to claim 9, wherein the extended pathway (12, 14) has a volume of approximately at least 2500 ml.

11. The system according to claim 1, wherein between the extended pathway (12) and the circle there is a microbe filter (15).