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Arrangement in connection with a patient circuit and an absorber means. The arrangement comprises an information transfer means and an electronic means and a transponder electronically programmed with desired information. The transponder is attached to the absorber means. The information transfer m

Arrangement in connection with a patient circuit and an absorber means. The arrangement comprises an information transfer means and an electronic means and a transponder electronically programmed with desired information. The transponder is attached to the absorber means. The information transfer means is arranged to communicate with the transponder, and the electronic means is arranged to carry out desired procedures from the basis of the information obtained from the anaesthesia/ventilation system and via the information transfer means from the transponder attached to the absorber means.

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The invention claimed is: 1. An arrangement for use with an anesthesia/ventilation system for a patient, the system including a breathing circuit for supplying breathing gases to the patient for respiration, said breathing circuit having means for flowing inspiratory gas to the patient and means fo

The invention claimed is: 1. An arrangement for use with an anesthesia/ventilation system for a patient, the system including a breathing circuit for supplying breathing gases to the patient for respiration, said breathing circuit having means for flowing inspiratory gas to the patient and means for flowing expiratory gases from the patient through a CO2 absorber means back to the inspiratory gas flow means, the arrangement comprising: a transponder attached to the absorber means and electronically programmed with desired information including information relating to a CO2 absorption characteristic of the absorber means; an electronic information transfer means arranged to communicate with said transponder; and electronic computation means, said electronic computation means being couplable to the anesthesia/ventilation system for receiving information relating to the amount of CO2 introduced in the breathing circuit in the course of respiration by the patient, said electronic computation means receiving information from said transponder, via said electronic information transfer means, relating to a CO2 absorption characteristic of the absorber means and performing a calculation to make a determination relating to the absorption of CO2 by the absorber means. 2. The arrangement of claim 1, wherein said electronic computation means makes an identification of the absorber means. 3. The arrangement of claim 1, wherein the electronic information transfer means comprises an antenna means, and that the antenna means is arranged to read the information programmed in the transponder. 4. The arrangement of claim 3, wherein the antenna means is arranged to feed information calculated in the electronic computation means to the transponder. 5. The arrangement of claim 1, wherein the electronic information transfer means comprises a wire connection between the electronic information transfer means and the transponder. 6. The arrangement of claim 5, wherein the wire connection is arranged to feed information determined in the electronic computation means to the transponder. 7. The arrangement of claim 3, wherein the antenna means is a RFID antenna and the transponder is an RFID tag. 8. The arrangement of claim 4, wherein the antenna means is a RFID antenna and the transponder is an RFID tag. 9. The apparatus of claim 1 wherein said electronic computation means is further defined as using information received from the transponder relating to the CO2 absorption capacity of the absorber means and information received from the anesthesia/ventilation system to make a determination of a current absorption capacity of the absorber means. 10. The arrangement of claim 9 wherein said electronic computation means makes a determination of one of the capacity of the absorber consumed or the capacity of the absorber remaining. 11. The arrangement of claim 9 wherein said electronic computation means makes a determination of the current absorption capacity of said absorber means as a percentage absorption capacity remaining or a percentage absorption capacity used up. 12. The arrangement of claim 1 wherein said electronic computation means uses information received from said transponder relating to the CO2 capacity of the absorber means and information received from the anesthesia/ventilation system to determine the rate at which CO2 is being absorbed by said absorption means, and determines the time remaining until the absorber means reaches its capacity for absorption. 13. The arrangement of claim 1 wherein said electronic computation means is further defined as using information received from the anesthesia/ventilation system comprising one or more of VCO2 (rate of CO2 production), fresh gas flow, minute volume, tidal volume, FiCO2 (fractional inspired CO2), and respiration rate. 14. The arrangement of claim 9 wherein said electronic computation means is further defined as using information received from the anesthesia/ventilation system comprising one or more of VCO2 (rate of CO2 production), fresh gas flow, minute volume, tidal volume, FiCO2 (fractional inspired CO2), and respiration rate. 15. The arrangement of claim 12 wherein said electronic computation means is further defined as using information received from the anesthesia/ventilation system comprising one or more of VCO2 (rate of CO2 production), fresh gas flow, minute volume, tidal volume, FiCO2 (fractional inspired CO2), and respiration rate. 16. The arrangement of claim 1 wherein said electronic computation means makes a determination of the periods of use of the absorber means. 17. The arrangement of claim 16 wherein said electronic computation means makes a determination of periods of exposure of the absorber means to dry flushing gases.