Determination of position of injection needle
First Claim
1. A handheld pen-shaped medication delivery device for expelling a set dose of a medicament to a user, the handheld pen-shaped medication delivery device comprising:
- a housing,a needle mount for mounting an injection needle having an electrically conducting exterior surface part, the needle receiving portion being adapted to galvanically or capacitively connect to the electrically conducting exterior surface part of the injection needle,a handle being adapted to be gripped on or touched by the hand of the user, an electrically conducting exterior surface part forming part of the handle, the electrically conducting exterior surface part of the handle forming an integral part of the housing or an operable actuator disposed in or on the housing,an electrical circuit comprising;
structure for determining a value of an electrical signal of a closed electrical signal path comprising an electrically conductive exterior surface part of an injection needle mounted on the device, the electrically conducting exterior surface part of the handle and at least part of the body of the user,structure for determining which of a number of predetermined ranges of values the determined value falls within indicative of the type of tissue into which a tip of the injection needle mounted on the device has been inserted, andstructure for generating an information signal to the user of the medication delivery device.
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Accused Products
Abstract
The present invention relates to a method for detecting contact between an injection needle of a medication delivery device and a body of a patient. The method comprises the step of generating a contact signal in response to closure of an electrical signal path comprising an exterior surface part of the injection needle, an exterior surface part of a handle of the medication delivery device and at least part of the body of the patient. The present invention further relates to a method for determining the position of insertion of the injection needle, and to the insertion depth of the injection needle.
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Citations
26 Claims
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1. A handheld pen-shaped medication delivery device for expelling a set dose of a medicament to a user, the handheld pen-shaped medication delivery device comprising:
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a housing, a needle mount for mounting an injection needle having an electrically conducting exterior surface part, the needle receiving portion being adapted to galvanically or capacitively connect to the electrically conducting exterior surface part of the injection needle, a handle being adapted to be gripped on or touched by the hand of the user, an electrically conducting exterior surface part forming part of the handle, the electrically conducting exterior surface part of the handle forming an integral part of the housing or an operable actuator disposed in or on the housing, an electrical circuit comprising; structure for determining a value of an electrical signal of a closed electrical signal path comprising an electrically conductive exterior surface part of an injection needle mounted on the device, the electrically conducting exterior surface part of the handle and at least part of the body of the user, structure for determining which of a number of predetermined ranges of values the determined value falls within indicative of the type of tissue into which a tip of the injection needle mounted on the device has been inserted, and structure for generating an information signal to the user of the medication delivery device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification