Purification system
First Claim
1. A regenerative absorber device for the removal of CO2 from CO2 containing expiration gases during anaesthesia, comprisinga container having an inlet for said CO2 containing expiration gases, and an outlet for output gases, whereby the CO2 has been substantially removed from said gases;
- and a weak basic anion exchanger having the capability to absorb CO2, and disposed in said container in such a way that the gases will flow through said anion exchanger from said inlet to said outlet.
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Accused Products
Abstract
The invention relates to a regenerative absorber device (20) for the removal of CO2 from expiration gases during anesthesia. The device comprises a container (38) having an inlet (39) for said expiration gases, and an outlet (41) for output gases, the CO2 content of which having been substantially removed therefrom. The device is provided with an ion exchanger (42) having the capability to absorb CO2, disposed in said container (38) such that the gases flow through said ion exchanger from said inlet (39) to said outlet (41). A novel method of anesthesia comprises use of a CO2 absorber device according to the invention.
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Citations
25 Claims
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1. A regenerative absorber device for the removal of CO2 from CO2 containing expiration gases during anaesthesia, comprising
a container having an inlet for said CO2 containing expiration gases, and an outlet for output gases, whereby the CO2 has been substantially removed from said gases; - and
a weak basic anion exchanger having the capability to absorb CO2, and disposed in said container in such a way that the gases will flow through said anion exchanger from said inlet to said outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A recirculating system for anaesthesia, comprising
supply means for supplying an anaesthetic gas; -
inspiration tubing means provided on an inspiration side of said system and fluidly connected to said supply means for passing anaesthetic gas to a patient;
expiration tubing means provided on an exhalation side of said system for removing exhalation gases from said patient;
said inspiration and expiration tubing means being connected to a mouthpiece for insertion in the patient'"'"'s mouth; and
at least one regenerative absorber device for removing CO2 from said exhalation gases;
said device comprising a container containing a weak basic anion exchanger, said container having an inlet connected to the expiration tubing means on the exhalation side, and an outlet connected to the inspiration tubing means on the inspiration side such that exhaled gases are divertable through said absorber device, and returned to the patient after having been freed from CO2.- View Dependent Claims (10, 11, 12)
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13. A method of regenerating an absorber device for removing CO2 from CO2 containing expiration gases, the device including a container containing a weak basic anion exchanger, the method comprising passing steam through said anion exchanger, optionally under reduced pressure to regenerate said absorber device.
- 14. A method of regenerating an absorber device for removing CO2 from CO2 containing expiration gases, the device including a container containing a weak basic anion exchanger, the method comprising passing alkaline medium through the anion exchanger, either while still inside the container, or removed from the container and placed in a separate regenerator vessel.
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16. A method of regenerating an absorber device for removing CO2 from CO2 containing expiration gases, the device including a container containing a weak basic anion exchanger, the method comprising the step of heating the anion exchanger and passing a gaseous medium therethrough, carrying liberated CO2 with said gaseous medium.
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17. A method of regenerating an absorber device for removing CO2 from CO2 containing expiration gases, the device including a container containing a weak basic anion exchanger, the method comprising subjecting the anion exchanger to vacuum conditions such that CO2 is liberated, optionally with heat applied.
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18. An apparatus for regenerating an absorber device for removing CO2 from CO2 containing expiration gases, said device including a container containing a weak basic anion exchanger, said container having an inlet for said CO2 containing gases, and an outlet for output gases, the apparatus comprising
steam generator means; -
means for passing steam from said steam generator means through said anion exchanger; and
detecting means operatively associated with said anion exchanger for detecting when said anion exchanger has been completely penetrated by steam from said steam generator. - View Dependent Claims (19, 20, 21, 22)
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23. A method of anaesthesia, comprising:
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supplying at a controlled rate a suitable inspiration gas mixture containing an anaesthetic agent, to a patient to be anaesthetized;
pumping away expiration gases at a suitable rate, for maintaining a controlled flow of inspiration gases to the patient;
passing at least a portion of said expiration gases through a weak basic anion exchanger for substantially removing CO2 therefrom; and
recirculating the portion of expiration gases, now freed from CO2, to the flow of inspiration gases. - View Dependent Claims (24, 25)
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Specification