Needle cannula position as an input to operational control of an injection device

• US 9,744,297 B2
• Filed: 04/10/2015
• Issued: 08/29/2017
• Est. Priority Date: 04/10/2015
• Status: Active Grant

• Current Assignee: West Pharma. Services IL, Ltd. (West Pharmaceutical Services Incorporated)
• Original Assignee: Medimop Medical Projects Ltd. (West Pharmaceutical Services Incorporated)
• Inventors: Cabiri, Oz, Hezkiahu, Ran
• Primary Examiner(s): VU, QUYNH-NHU HOANG
• Application Number:
  US14/683,253
• Publication Number:
  US 20160296699A1
• Time in Patent Office: 872 Days
• CPC Class Codes: A61M 2005/2013 triggering of discharging means by contact of injector with patient body
• CPC Class Codes: A61M 5/1626 Needle protectors therefor in combination with syringes A61M5/3202; protectors for sharps A61B50/3001
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: A61M 5/20 Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically A61M5/142 , A61M5/46 take precedence; hypodermic projectiles F42B12/54
• CPC Class Codes: A61M 5/2033 Spring-loaded one-shot injectors with or without automatic needle insertion multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287
• CPC Class Codes: A61M 5/2046 Media being expelled from injector by gas generation, e.g. explosive charge
• CPC Class Codes: A61M 5/2053 Media being expelled from injector by pressurised fluid or vacuum for infusion A61M5/145, A61M5/155
• CPC Class Codes: A61M 5/2066 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/3202 Devices for protection of the needle before use, e.g. caps A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001
• CPC Class Codes: A61M 5/3204 Needle cap remover, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices
• CPC Class Codes: A61M 5/326 Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
• CPC Class Codes: A61M 5/50 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile retractable needles or needle protectors with means for preventing re-use A61M5/321
• CPC Class Codes: A61M 5/5086 for indicating if defective, used, tampered with or unsterile
• CPC Class Codes: G16H 20/17 delivered via infusion or injection

Abstract

A method is disclosed for state sensing and controlling of a multi-state drug delivery device. In some embodiments a power switch is reused as a state sensor. Optionally the state sensor may be toggled by user actions and/or the movements of parts of the device, for example needle and/or a protective element. Optionally, drug discharge and/or status indication is controlled in accordance with sensor output. In some embodiments control is by means of a processor. Alternatively or additionally, control is by means of simple physical circuits.

Claims

1. A status sensor assembly for a multi-stage drug delivery device comprising:

a first power supply circuit;

a processor;

a power switch isolating said first power supply circuit from said processor when the device is in an inactive stage and wherein in response to toggling of said power switch when the device is in said inactive stage said power supply circuit is connected to said processor, supplying power to said processor;

said processor programmed to initiate an activated stage of the device in response to said supplying of power to the processor;

a trigger assembly positioned to re-toggle said power switch upon engagement of the device to a subject;

a sensor circuit indicating to said processor said re-toggling of said switch, said processor programmed to switch the device to a discharging stage in response to said indicating of said re-toggling;

a driver responsive to said processor, said driver discharging the drug from the device when the device is in the discharge stage.

2. The assembly of claim 1, further comprising:

a second power supply circuit, said second power supply circuit supplying no power to the processor when said device is in said inactive stage, said second power supply circuit responsive to said processor for supplying power to the processor in a discharging stage.

3. The assembly of claim 1, wherein in said inactive stage, substantially no power is supplied to said processor.

4. The assembly of claim 1, further comprising:

a protective element, inhibiting engagement of the device to the subject, said protective element being connected to said power switch such that said toggling is performed by removing said protective element from the device.