Apparatus and method for ensuring compatibility of a reusable iontophoretic controller with an iontophoretic patch
First Claim
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1. An iontophoretic drug delivery device comprising:
- a reusable controller having a power source;
a patch for attaching to the skin of a patient, the patch including electrodes in the form of an anode and a cathode, one of the said anode and said cathode including a reservoir containing an ionizable substance for transcutaneous delivery to the patient, said patch being removably, electrically connectable to said controller for delivering current from the controller to the patch electrodes; and
means for determining whether the controller is compatible with the patch, the determining means including means for preventing current from the controller from being delivered to said patch electrodes when th epatch is connected to the controller if said controller and patch are deemed incompatible.
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Abstract
An iontophoretic drug delivery device including a reusable controller and patch are disclosed. The controller and patch include electronics which ensure compatibility of the reusable iontophoretic controller with the specific patch to which it is connected. If the controller determines that the patch is incompatible with the controller, the controller does not apply current to the patch.
66 Citations
17 Claims
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1. An iontophoretic drug delivery device comprising:
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a reusable controller having a power source; a patch for attaching to the skin of a patient, the patch including electrodes in the form of an anode and a cathode, one of the said anode and said cathode including a reservoir containing an ionizable substance for transcutaneous delivery to the patient, said patch being removably, electrically connectable to said controller for delivering current from the controller to the patch electrodes; and means for determining whether the controller is compatible with the patch, the determining means including means for preventing current from the controller from being delivered to said patch electrodes when th epatch is connected to the controller if said controller and patch are deemed incompatible. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An iontophoretic drug delivery device comprising:
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a controller for providing a specific current to drive an ionizable substance into the skin of a patient, said controller including a resistive network; a patch removably, electrically coupled to said controller, said patch including an anode and a cathode, one of said anode and cathode including a reservoir containing an ionizable substance; and
electrically conductive lead coupled to the cathode and an electrically conductive lead coupled to said anode; and
a resistive bridge coupled to said cathode lead; andmeans for comparing a resistive ratio of said controller resistive network with a resistive ratio of said patch bridge circuit, the controller including a means for disabling said controller which will permit current to flow from the controller to the patch only if the resistive ratio of said controller and said resistive ratio of said patch are deemed compatible. - View Dependent Claims (14, 15, 16, 17)
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Specification