INSERTER HAVING BISTABLE EQUILIBRIUM STATES

• US 20100286615A1
• Filed: 07/02/2008
• Published: 11/11/2010
• Est. Priority Date: 07/03/2007
• Status: Active Grant

• Current Assignee: Unomedical AS (ConvaTec Group Plc)
• Original Assignee: Unomedical AS (ConvaTec Group Plc)
• Inventors: Hasted, Søren Bo, Hagedorn, Brian Boyum, Gyrn, Steffen
• Granted Patent: US 8,430,850 B2
• Time in Patent Office: Days
• US Class Current: 604/164.04
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters
• CPC Class Codes: A61M 25/0612 Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• 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 invention relates to an inserter for an infusion set for intermittent or continuous administration of a therapeutical substance, such as e.g. insulin. The inserter comprises means for insertion and retraction of an introducer needle. With an inserter device according to the invention it is possible to introduce an insertion needle when placing a medical device sub- or transcutaneously. The Inserter device comprises a housing (1, 2, 12) which hides the insertion needle (7, 17) before insertion and can hide the insertion needle (7, 17) after insertion and placing of the medical device. The insertion needle (7, 17) moves relative to the housing (1, 2, 12) toward the patients skin surface during insertion and the inserter device comprises a bi-stable elastic element (1, 11) having two equilibrium states.

Claims

1. Inserter device used to introduce an insertion needle when placing a medical device sub- or transcutaneously, the inserter comprising:

an elastic element to provide insertion of the insertion needle, the elastic element is a bi-stable elastic element having two equilibrium states; and

a housing which hides configured to conceal the insertion needle before insertion and optionally configured to conceal the insertion needle after insertion and placing of the medical device, and

wherein the insertion needle moves relative to the housing toward the patients skin surface during insertion.

2. Inserter device according to claim 1, wherein one equilibrium state is in a retracted position where the insertion needle or a cannula is protected from the surroundings and the second equilibrium state is in a forward position where the insertion needle and/or the cannula extends from the housing.

3. Inserter device according to claim 1, wherein the insertion needle is secured to the elastic element.

4. Inserter device according to claim 1, wherein the elastic element is a part of an outer surface of the housing of the inserter device.

5. Inserter device according to claim 1, wherein the elastic element comprises a flexible piece of material having two opposite ends, the ends are held stationary relative to the housing at a distance shorter than a length of the elastic element in a stretched or unloaded state.

6. Inserter device according to claim 1, wherein the device further comprises activating means configured to move the elastic element from one position to the other position.

7. Inserter according to claim 1, wherein the inserter device is.

8. Inserter according to claim 1, wherein the inserter is configured to insert a medical device comprising an infusion part comprising a through going opening and a cannula.

9. Inserter according to claim 1, wherein the inserter is configured to insert a medical device comprising a sensor part comprising a sensor for sub- or transcutaneous positioning.

10. Inserter according to claim 1, wherein the medical device comprises an adhesive proximal surface for fastening of the medical device to the skin of the patient.

11. Inserter according to claim 1, wherein the medical device includes a hard self-penetrating cannula.

12. Inserter according to claim 1, wherein the inserter device includes a penetrating insertion needle and the medical device includes a soft cannula.