Wearable medication delivery device

Abstract

Systems and methods for delivering a medication to a person experiencing an emergency medical event without requiring intervention or action on the part of the person. A device encases a reservoir of medication and a delivery mechanism. Sensors in the housing sense a physical attribute of the person and circuitry monitors information collected by the sensors to determine if the person is experiencing a severe medical condition or event based on the information. An input device on or in the housing, such as a button, may be used or activated by the person if the detected condition or event is a false positive to cancel further action. If the system does not include the button or if the user does not press it in time, the system activates the delivery device and injects the medication into the person.

What is claimed is: 
     
         1 . An on-body drug delivery device, comprising:
 a reusable first portion including a motion sensor and a computer processor; and   a second portion including a needle, and a fluid reservoir for storing liquid medication,   wherein the first portion and the second portion are releasably attached to one another, the motion sensor is operable to capture acceleration information in three different axes and to be in electrical communication with the computer processor via a wired connection.   
     
     
         2 . The drug delivery device of  claim 1 , wherein the second portion further comprises:
 a power supply configured to supply power for a minimum amount of time, wherein the adhesive member has adhesive properties and the adhesive member is configured to lose some of its adhesive properties over the minimum amount of time.   
     
     
         3 . The on-body drug delivery device of  claim 2 , wherein the minimum amount of time that the adhesive member loses some of its adhesive properties is one day 
     
     
         4 . The on-body drug delivery device of  claim 1 , wherein the first portion further comprises:
 a power supply configured to supply power for a minimum amount of time, wherein the adhesive member has adhesive properties and the adhesive member is configured to lose some of its adhesive properties over the minimum amount of time.   
     
     
         5 . The on-body drug delivery device of  claim 3 , wherein the minimum amount of time that the adhesive member loses some of its adhesive properties is at least 2 days. 
     
     
         6 . The on-body drug delivery device of  claim 1 , wherein the second portion is configured to be disposable and the first portion is operable to be reusable with at least one new second portion. 
     
     
         7 . The on-body drug delivery device of  claim 1 , wherein the second portion further comprises:
 batteries and corresponding metal elements coupled to the batteries, wherein the first portion includes conducting metal elements that mate with the corresponding metal elements in the second portion.   
     
     
         8 . The on-body drug delivery device of  claim 1 , further comprises:
 if the first portion and the second portion are separated, the on-body drug delivery device is configured to be inoperable.   
     
     
         9 . The on-body drug delivery device of  claim 1 , wherein the fluid reservoir of the second portion is operable to dispense a quantity of liquid medication through the needle. 
     
     
         10 . The on-body drug delivery device of  claim 1 , wherein when the first portion and the second portion are releasably attached to one another, the first portion and the second portion are held together by a friction fit or by tabs. 
     
     
         11 . The on-body drug delivery device of  claim 1 , wherein when the first portion and the second portion are releasably attached to one another, one or both of the first portion. 
     
     
         12 . The on-body drug delivery device of  claim 1 , wherein the first portion and the second portion include a signal path then enables the computer processor of the first portion to communicate with the second portion. 
     
     
         13 . The on-body drug delivery device of  claim 1 , further comprising:
 a needle actuator configured to deploy the needle.   
     
     
         14 . The on-body drug delivery device of  claim 1 , further comprising:
 a plunger disposed in the fluid reservoir at an end of the reservoir opposite the needle and configured to advance within the reservoir toward the needle.   
     
     
         15 . The on-body drug delivery device of  claim 13 , further comprising:
 an electrochemical operable to exert a force on the plunger, wherein the force causes the plunger to advance toward the needle.   
     
     
         16 . The on-body drug delivery device of  claim 1 , wherein the reservoir further comprises:
 an elastic member that is configured to exert a force on any liquid medication stored in the reservoir.   
     
     
         17 . The on-body drug delivery device of  claim 1 , wherein the reservoir further comprises:
 a propellant that is configured to exert a force on any liquid medication stored in the reservoir.   
     
     
         18 . The on-body drug delivery device of  claim 1 , wherein:
 the needle is disposed within the on-body drug delivery device.   
     
     
         19 . The on-body drug delivery device of  claim 1 , further comprising:
 a spring positioned proximal to the needle and configured to force the needle into a body of a person upon activation.   
     
     
         20 . The on-body drug delivery device of  claim 19 , wherein the spring is compressed against a surface within the on-body housing.