DRUG EJECTION APPARATUS, ESTIMATION OF EJECTION PERFORMANCE THEREOF, AND METHOD OF DRUG EJECTION
First Claim
1. A drug ejection apparatus comprising:
- a drug ejection assembly having an ejection port and an element for generating energy for ejecting a drug through the ejection port,a drug container connected with the drug ejection assembly for holding the drug,a pressure sensor unit for sensing a change of the inside pressure of the drug container caused in correspondence with an amount of the drug ejected through the drug ejection assembly, anda drive control unit for deciding driving conditions of the element for ejecting a prescribed amount of the drug by reference to an output level of the pressure sensor unit on driving the element under prescribed conditions.
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Accused Products
Abstract
A drug ejection apparatus comprises a drug ejection assembly having an ejection port and an element for generating energy for ejecting a drug through the ejection port, a drug container connected with the drug ejection assembly for holding the drug, a pressure sensor unit for sensing a pressure change in the inside of the drug container in correspondence with ejection of the drug through the drug ejection assembly, and a drive control unit for deciding driving conditions of the element for ejecting a prescribed amount of the drug by reference to an output level of the pressure sensor unit on driving the element under prescribed conditions.
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Citations
8 Claims
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1. A drug ejection apparatus comprising:
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a drug ejection assembly having an ejection port and an element for generating energy for ejecting a drug through the ejection port, a drug container connected with the drug ejection assembly for holding the drug, a pressure sensor unit for sensing a change of the inside pressure of the drug container caused in correspondence with an amount of the drug ejected through the drug ejection assembly, and a drive control unit for deciding driving conditions of the element for ejecting a prescribed amount of the drug by reference to an output level of the pressure sensor unit on driving the element under prescribed conditions. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for estimating ejection performance of a drug ejection apparatus, having a drug ejection assembly having an ejection port and an element for generating energy for ejecting the drug through the ejection port, and a drug container connected to the drug ejection assembly for holding the drug,
wherein the performance of ejection of the drug is estimated from the change of the inside pressure of the drug container caused by driving of the element under prescribed driving conditions.
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8. A method for ejecting a drug employing a drug ejection apparatus, having a drug ejection assembly having an ejection port and an element for generating energy for ejecting the drug through the ejection port, and a drug container connected to the drug ejection assembly for holding the drug, wherein the method comprises:
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a first step of ejecting the drug through the drug ejection port with the volume of the drug container fixed, a second step of sensing a pressure change in the drug container corresponding to the amount of the drug ejected in the first step, a third step of deciding conditions of driving the element for ejecting the drug in a prescribed amount, and a fourth step of ejecting the drug through the drug ejection assembly under the driving conditions decided in the third step.
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Specification