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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0205598 (1994-03-01) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 349 인용 특허 : 0 |
An apparatus for delivering medicinal aerosol on-demand during patient inhalation wherein delivery of aerosol from a nebulizer (22) is optimized by synchronizing delivery to the inspiration of a patient (58)is disclosed. A control unit (32) monitors airway pressure and controls the flow of gas so th
An apparatus for delivering medicinal aerosol on-demand during patient inhalation wherein delivery of aerosol from a nebulizer (22) is optimized by synchronizing delivery to the inspiration of a patient (58)is disclosed. A control unit (32) monitors airway pressure and controls the flow of gas so that aerosol delivery is triggered by patient inhalation, in which event delivery continues for a predetermined time period which is adjustable by the user. The apparatus can be used with a mouthpiece (56), a face mask (66) without an integral exhalation valve, or a face mask (68) with an integral exhalation valve. The apparatus significantly increases the efficiency of delivery of medicinal aerosol by sensing a patient\s inhalation and exhalation cycles and delivering aerosol only after a certain inhalation pressure is sensed following a certain previous exhalation pressure. These pressures, which are compared against predetermined thresholds, correspond to the actual patient breathing condition. By monitoring the patient\s inhalation and exhalation in this manner, aerosol delivery is synchronized with the patient\s breathing pattern. In this way, the apparatus prevents aerosol contamination of the environment without requiring an exhalation filter since aerosol is delivered to the patient only during inhalation. Exhalation is not obstructed since aerosol is not delivered during exhalation. Further, when it is desirable to use an exhalation filter to reduce the amount of exhalation gas discharged into the environment, the apparatus reduces occlusion occurring in the exhalation filter.
A breath actuated apparatus for on-demand delivery of medicinal aerosol produced by a nebulizer containing medicament aerosolized by a flow of breathable gas, comprising: (a) a first wye, said first wye including first aerosol outlet means for delivering medicinal aerosol to a patient, said first wy
A breath actuated apparatus for on-demand delivery of medicinal aerosol produced by a nebulizer containing medicament aerosolized by a flow of breathable gas, comprising: (a) a first wye, said first wye including first aerosol outlet means for delivering medicinal aerosol to a patient, said first wye including aerosol inlet means for receiving medicinal aerosol from a nebulizer, said first wye including air inlet means for receiving ambient air; (b) a uni-directional inhalation valve coupled to said air inlet means; (c) signalling means for providing an inhalation pressure signal representing inhalation of said patient and an exhalation pressure signal representing exhalation of said patient, said inhalation signal generated by said patient\s inhalation airflow, said exhalation signal generated by said patient\s exhalation airflow; and (d) control means for sensing the magnitude of said inhalation and exhalation signals, said control means being responsive to a threshold inhalation pressure followed by a threshold exhalation pressure to permit delivery of said breathable gas to a nebulizer only when said threshold inhalation pressure is followed by said threshold exhalation pressure.
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