Infusion set self-occlusion mechanism

• US 7,951,122 B2
• Filed: 05/12/2008
• Issued: 05/31/2011
• Est. Priority Date: 05/10/2007
• Status: Expired due to Fees

• Current Assignee: Medx-Set
• Original Assignee: Medx-Set Ltd.
• Inventors: Shekalim, Avraham
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): LEE, BRANDY SCOTT
• Application Number:
  US12/118,786
• Publication Number:
  US 20080281276A1
• Time in Patent Office: 1,114 Days
• Field of Search: 604/164.01, 604/110, 604/111, 604/248, 604/167.01, 604/250
• US Class Current: 604/250
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2005/1587 suitable for being connected to an infusion line after insertion into a patient
• CPC Class Codes: A61M 2005/1588 having means for monitoring, controlling or visual inspection, e.g. for patency check, avoiding extravasation
• CPC Class Codes: A61M 2205/13 with means for the detection of operative contact with patient, e.g. lip sensor
• CPC Class Codes: A61M 39/281 Automatic tube cut-off devices, e.g. squeezing tube on detection of air
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Abstract

A device, system and method for occluding fluid flow through an infusion set detached from a patient'"'"'s body. The device includes a means for detecting loss of contact to a patient'"'"'s body and activating an occlusion mechanism accordingly.

Claims

1. An infusion set for administering a fluid through the skin, the infusion set comprising:

(a) a cannula having a lumen for fluid transfer through the skin;

(b) a retention arrangement maintaining an inserted position of said cannula through the skin; and

(c) a self-occlusion mechanism associated with said retention arrangement and with said cannula, said self-occlusion mechanism being configured such that, while said retention arrangement maintains an inserted position of said cannula, said self-occlusion mechanism is retained in a first non-occluding state and, if said retention arrangement ceases to maintain the inserted position of said cannula, said self-occlusion mechanism assumes a second state in which said self-occlusion mechanism substantially occludes fluid flow through said cannula.

2. The infusion set of claim 1, further comprising an inserter needle initially inserted in the lumen of said cannula such that said inserted needle prevents said self-occlusion mechanism from assuming said second state prior to withdrawal of said inserter needle.

3. The infusion set of claim 1, wherein said retention arrangement includes an adhesive material applied to the underside of said infusion set unit.

4. The infusion set of claim 1, wherein said self-occlusion mechanism includes a biasing element to resiliently bias said mechanism to assume said second state.

5. The infusion set of claim 4, wherein said biasing element includes a leaf spring.

6. The infusion set of claim 1, wherein said self-occlusion mechanism includes a constriction element to occlude said cannula.

7. The infusion set of claim 6, wherein said constriction element includes a rotatably mounted cam.

8. The infusion set of claim 6, wherein said constriction element includes a slidably mounted constriction element.

9. The infusion set of claim 1, wherein said self-occlusion mechanism includes a cannula biased to assume a kinked configuration.

10. The infusion set of claim 1 wherein said self-occlusion mechanism is configured to fully occlude said cannula.