Apparatus for administration of at least two gases to a patient
August 30, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3046979 3814092 Oxygen and anesthesia delivery and monitoring device Anesthetic gas control apparatus Anaesthesia--breathing apparatus Narcotics evaporator having a monitor equipped by-pass Method and apparatus for converting patient breathing system between circle and non-rebreathing configurations Electronically-controlled gas blending system Fluid flow regulator Electrically controllable anesthesia vaporizer Patent #: 4770168 InventorApplicationNo. 399512 filed on 08/30/1989US Classes:128/203.12, Means for mixing treating agent with respiratory gas128/203.14, Control means responsive to condition other than user's airway pressure128/204.14, Respiratory gas passed over surface of liquid treating agent in reservoir128/204.21, Electric control means128/205.11, Means for varying air/oxygen ratio128/205.12Means for removing substance from respiratory gasExaminersPrimary: Eickholt, Eugene H.Attorney, Agent or FirmInternational ClassesA61M 015/00A61M 016/00 205.16 205.27 205.13 205.29 204.13 204.14 204.15 204.16 204.17 204.28 203.28 Foreign Application Priority Data1987-03-09 SEAbstractAn apparatus for administration of at least two gases to a patient is described. The apparatus comprises a patient circuit (40) which consists of a circle system for rebreathing and a drive circuit (20), and which is provided with delivery means (45, 46) for supplying fresh gas, and a carbon dioxide absorber (44), the apparatus further comprising an actual value transducer (47) for the gas concentration of one gas type, a desired value transducer (81) for indicating the desired gas concentration, and a control device (80) for maintaining said gas concentration. The apparatus is characterised in that the patient circuit and the drive circuit communicate with each other via a gas switching unit or exchanger (30) for open separation, and that the control device (80) comprise a calculating means for determining the gas volume and gas type to be supplied to the patient circuit (40) so as to obtain the desired value concentration.Field of SearchMeans for mixing treating agent with respiratory gasControl means responsive to condition other than user's airway pressure Means for varying treating agent/respiratory gas ratio Means for supplying respiratory gas under positive pressure Electric control means Means for sensing partial pressure, or amount, of component in gas mixture Gas supply means responsive to breathing Means for varying air/oxygen ratio Means for adjusting gas volume delivered to user from bag, bellows, or bulb during inflation-deflation cycle Means for removing substance from respiratory gas | |
