Sealing Between a Cannula Part and a Fluid Path

• US 20110034883A1
• Filed: 02/12/2009
• Published: 02/10/2011
• Est. Priority Date: 02/13/2008
• Status: Active Grant

• Current Assignee: Unomedical AS (ConvaTec Group Plc)
• Original Assignee: Unomedical AS (ConvaTec Group Plc)
• Inventors: Hørdum, Elo lau, Gyrn, Steffen
• Granted Patent: US 10,898,643 B2
• Time in Patent Office: Days
• US Class Current: 604/244
• 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 2005/1585 Needle inserters
• CPC Class Codes: A61M 2005/1587 suitable for being connected to an infusion line after insertion into a patient
• CPC Class Codes: A61M 2039/267 having a sealing sleeve around a tubular or solid stem portion of the connector
• CPC Class Codes: A61M 5/1413 Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/14248 of the skin patch type
• 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

The application relates to an infusion part comprising a cannula part (7) and a fluid path, whereby a sealing (18) is positioned between the cannula part and the inlet/outlet opening (12) of the fluid path when the cannula part is in position for use in order to keep the fluid path to the cannula tight. The sealing (18) is surrounding the inlet/outlet opening (12) and/or the distance di between a centre line c of the cannula part and a point on the outer surface of the cannula part positioned at or above the upper edge of the sealing (18) is larger than the distance 02 between the centre line c of the cannula part and a point on the outer surface of the cannula part positioned at or below the lower edge of the sealing.

Claims

1. An infusion part comprising:

a fluid path, the fluid path comprising at least one inlet and one outlet opening through which a fluid can enter and exit the fluid path;

a cannula part, the cannula part comprising a body formed by a hard material and having an inner through going opening in fluid contact with a cannula, the cannula has an inner opening which provides fluid contact with the patient, the body of the cannula part has an opening corresponding to the inlet or outlet opening of the fluid path resulting in fluid contact between the fluid path and the cannula part when the cannula part opening and the inlet or outlet opening are positioned opposite each other, allow unrestricted flow, and

a sealing positioned between the cannula part and the inlet or outlet opening of the fluid path when the cannula part is in position for use to keep the fluid path to the cannula tight, the sealing surrounds the inlet or outlet opening or a distance d₁ between a centre line c of the cannula part and a point on an outer surface of the cannula part positioned at or above an upper edge of the sealing is larger than a distance d₂ between the centre line c of the cannula part and a point on the outer surface of the cannula part positioned at or below a lower edge of the sealing.

2. An infusion part according to claim 1, wherein the body of the cannula part is provided with a sealing before use.

3. An infusion part according to claim 1, wherein the opening of the fluid path is provided with a sealing before use.

4. An infusion part according to claim 2, wherein the sealing material is hydrophobic and elastic.

5. An infusion part according to claim 4, wherein the sealing material comprises silicone.

6. An infusion part according to claim 1, wherein the body of the cannula part has at least a second opening to the inner through going opening.

7. An infusion part according to claim 6, wherein the second opening to the inner through going opening is covered by a self closing membrane, the membrane is penetrable by a blunt or pointed needle.

8. An infusion part according to claim 1, wherein the infusion part comprises a base part configured to be fastened to a patient'"'"'s skin.

9. An infusion part according to claim 8, wherein the base part is provided with a cavity corresponding to the 3-dimensional profile of a non-penetrating end of the cannula part.

10. An assembly according claim 9, the cavity extends below an outer surface of the base part providing walls that tightly fit around the cannula part when the cannula part is inserted into the patient.

11. An assembly according to claim 10, wherein the inlet or outlet opening of the fluid path opens into the wall of the cavity fitting around the cannula part and when the cannula part is inserted, the opening of the cannula part corresponds to the opening of the fluid path.

12. An assembly according to claim 1, wherein the angle d between the direction of insertion of the cannula part and a plane tangent to the surface surrounding the opening opposite the sealing, is 0<

d<

90°

.

13. An infusion part according to claim 8, wherein the base part comprises a hard material.

14. An infusion part according to claim 8, wherein the fluid path is formed as an integrated part of the base part.

15. An infusion part according to claim 13 wherein the hard material is a molded plastic material.