Injection methods using a servo-controlled needle-free injector
First Claim
1. A method for injecting a substance through a surface of a biological body, the method comprising the steps of:
- providing a needle-free transdermal transport device configured to inject the substance through the surface of the biological body; and
injecting the substance into the biological body with the transport device while(i) sensing a parameter associated with the injection, the parameter comprising at least one of deformation of an ampoule disposed on the needle-free transdermal transport device and sound of substance impinging on the biological body; and
(ii) using a servo-controller to dynamically adjust at least one injection characteristic based on the sensed parameter,wherein the substance is injected for (i) a first time period during which a first portion of a volume of the substance is injected at the first injection pressure, and (ii) a second time period during which a remainder of the volume of the substance is injected at a second injection pressure.
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Accused Products
Abstract
A method for injecting a substance through a biological body surface includes providing a needle-free transdermal transport device configured to inject the substance through the surface. The substance is injected into the biological body with the transport device while a parameter of the injection is sensed and a servo-controller is used to dynamically adjust at least one injection characteristic based on the sensed parameter. The substance is injected for (i) a first time period during which a first portion of a volume of the substance is injected at a first injection pressure, and (ii) a second time period during which a remainder of the volume of the substance is injected at a second injection pressure. A viscosity of the substance may be determined, and a pressure calculated for injecting the substance based on the viscosity. The substance may be injected with the transport device by using the calculated pressure.
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Citations
15 Claims
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1. A method for injecting a substance through a surface of a biological body, the method comprising the steps of:
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providing a needle-free transdermal transport device configured to inject the substance through the surface of the biological body; and injecting the substance into the biological body with the transport device while (i) sensing a parameter associated with the injection, the parameter comprising at least one of deformation of an ampoule disposed on the needle-free transdermal transport device and sound of substance impinging on the biological body; and (ii) using a servo-controller to dynamically adjust at least one injection characteristic based on the sensed parameter, wherein the substance is injected for (i) a first time period during which a first portion of a volume of the substance is injected at the first injection pressure, and (ii) a second time period during which a remainder of the volume of the substance is injected at a second injection pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A control system for a needle-free transdermal transport device configured to inject a substance through a surface of a biological body, the control system comprising:
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a sensor for sensing a parameter of the injection, the sensor selected from the group consisting of a sensor that senses deformation of an ampoule disposed on the needle-free transdermal transport device and a sensor that senses sound of substance impinging on the biological body; and a servo-controller to dynamically adjust at least one injection characteristic based on the sensed parameter, wherein the sensor and the servo-controller control the injection of the substance such that the substance is injected for (i) a first time period during which a first portion of a volume of the substance is injected at a first injection pressure, and (ii) a second time period during which a remainder of the volume of the substance is injected at a second injection pressure. - View Dependent Claims (12, 13, 14, 15)
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Specification