SYRINGE TYPE PUMP

• US 20150273139A1
• Filed: 06/15/2015
• Published: 10/01/2015
• Est. Priority Date: 10/11/2010
• Status: Active Grant

• Current Assignee: PharmaSens AG
• Original Assignee: PharmaSens AG
• Inventors: HADVARY, Paul, Tschirky, Hansjorg
• Granted Patent: US 10,117,989 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06
• CPC Class Codes: A61B 5/150229 Pumps for assisting the blood sampling
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2005/31518 designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 5/14216 Reciprocating piston type
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/1454 spring-actuated, e.g. by a clockwork
• CPC Class Codes: A61M 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00
• CPC Class Codes: A61M 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: A61M 5/3287 Accessories for bringing the needle into the body; Automatic needle insertion A61M5/20, A61M5/31525 take precedence

Abstract

The subcutaneous injection device contains a pump and a mechanism for inserting a cannula into the patient'"'"'s skin. The cannula is fixedly positioned relative to the pump and the insertion mechanism has a flexible surface adhering to the skin. The flexible surface is positioned relative to the cannula in such a way that in a first position the tip of the cannula is concealed by the surface and in a second position the cannula is exposed beyond the surface. The insertion mechanism brings the surface from the first to the second position, thereby pulling the skin against the tip of the cannula.

Claims

1. A device for subcutaneous injection of fluid into a patient comprises a pump and means for inserting a cannula into the patient'"'"'s skin, the cannula is fixedly positioned relative to the pump and the insertion means into the skin is a component with a flexible surface having means for adherence of that surface to the skin and means to position the flexible surface relative to the fixedly positioned cannula in such a way that in a first position the tip of the cannula is concealed by the surface and in a second position the implantable part of the cannula is exposed beyond the surface and a mechanism to bring the surface from the first to the second position, thereby pulling the attached skin against the tip of the cannula.

2. The device according to claim 1 wherein the pump is a circular syringe pump.

3. The device according to claim 1 wherein the device contains more than one cannula being inserted into the skin simultaneously by the same insertion mechanism.

4. The device according to claim 1 wherein the insertion means of the cannula into the skin actuates the piercing of a protecting septum of the cannula before insertion into the skin.

5. The device according to claim 1 wherein the device comprises more than one pump for delivery of injection fluid into a patient.

6. The device according to claim 1 further comprises a measuring means for one or several analytes and means to display the results of these measurements and/or to transmit them wirelessly and/or to use them for the controlled delivery of injection fluid.

7. The device according to claim 1 wherein the means for securing adherence to the skin is an adhesive layer for temporary wearing on the body.

8. The device according to claim 7 wherein the adhesive layer is fixed on the flexible surface of the device by a reduced surface in comparison to the adhesive surface to the skin.

9. The device according to claim 1 wherein the means for bringing the flexible surface from a first to a second position makes use of the elasticity of this surface for a rapid movement by relaxation from an enforced tense position.

10. The device according to claim 9 wherein the means for bringing the flexible surface into two distinct positions comprises a sliding bolt mechanism actuated by pressing a knob.

11. The device according to claim 1 wherein the device is applied to the skin using a functional package with a rim pressing the adhesive layer towards the skin and protecting the release and actuation elements of the device against unintended activation.