Sealing between a cannula part and a fluid path

Patent metadata

Field	Value
Publication number	US-10898643-B2
Application number	US-86556609-A
Country	US
Kind code	B2
Filing date	Feb 12, 2009
Priority date	Feb 13, 2008
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

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 an 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 a cannula tight. The sealing (18) is surrounding the inlet/outlet opening (12) and/ or the 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 (18) is larger than the 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.

First claim

The invention claimed is:

1. An infusion part comprising:
a base part attached to a patient's skin during use, the base part comprising a connector part, the connector part comprising a fluid path, the fluid path comprising two fluid path openings, wherein each fluid path opening of the two fluid path openings is an inlet opening or an outlet opening;
a cannula part, comprising a body and a cannula, the body comprised of a hard material contacting at least a part of the cannula, the cannula attached to the body, and having an inner through going opening in fluid contact with the cannula, the cannula comprising a center line, wherein the center line is straight and perpendicular to a surface of the base part configured to be aligned with the patient's skin before insertion into the patient, and the cannula has an inner opening providing fluid contact with the patient, the body of the cannula part comprising a protruding front part comprising a flat surface, wherein the protruding front part of the cannula part comprises an opening defined through the flat surface and corresponding to one of the two fluid path openings of the connector part, wherein fluid flow through the cannula part to the patient is allowed when the opening of the protruding front part of the cannula part is positioned opposite of the one of the two fluid path openings of the connector part, and wherein the protruding front part comprising the flat surface has an inclination defined by an angle d between the center line of the cannula and the flat surface of the protruding front part, wherein the angle d is such that 0°<d <90°; and
a sealing part positioned between the cannula part and the one of the two fluid path openings when the cannula part is in position for use, wherein the sealing part is provided on the connector part around the one of the two fluid path openings when the cannula part is in position for use, wherein a material of the sealing part is elastic;
wherein, the base part further comprises a cavity corresponding to the cannula part, and the cavity comprises walls that are adapted to press-fit the cannula part when the cannula part is being inserted into the patient, and wherein the cannula is capable of being inserted into the patient along a direction of insertion.

2. The infusion part according to claim 1 , wherein the connector part is provided with the sealing part before use, and wherein the sealing part is provided in a round track surrounding the one of the two fluid path openings.

3. The infusion part according to claim 1 , wherein the material of the sealing part is hydrophobic and elastic.

4. The infusion part according to claim 1 , wherein the material of the sealing part comprises silicone.

5. The 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.

6. The infusion part according to claim 5 , wherein the second opening to the inner through going opening is covered by a self closing membrane, and wherein the membrane is penetrable by a blunt or pointed needle.

7. The infusion part according claim 1 , wherein the cavity extends below an outer surface of the base part providing the walls that tightly fit around the cannula part when the cannula part is inserted into the patient.

8. The infusion part according to claim 7 , wherein the one of the two fluid path openings opens into the walls of the cavity fitting around the cannula part and when the cannula part is inserted, the opening of the protruding front part corresponds to the one of the two fluid path openings.

9. The infusion part according to claim 1 , wherein the base part comprises a hard material.

10. The infusion part according to claim 9 , wherein the hard material is a molded plastic material.

11. The infusion part according to claim 1 , wherein the two fluid path openings are formed as an integrated part of the base part.

12. The infusion part according to claim 1 , wherein the cannula part is provided separate from and connectable to the base part to allow fluid flow.

13. The infusion part according to claim 12 , wherein the cannula part is connectable to the base part with an inserter.

14. The infusion part according to claim 1 , further wherein, the fluid path is defined through a tube that is selectively coupled to the connector part.

15. An infusion assembly, comprising:
a plate configured to be positioned adjacent to a patient's skin;
a connector part coupled to, or formed from, the plate, the connector part having a fluid path defined from a cannula cavity to an access opening;
a cannula part configured to be selectively received at least partially within the cannula cavity, the cannula part comprising:
a body;
a cannula coupled to the body along a center line and configured to extend past the plate to contact the patient when the cannula part is positioned at least partially within the cannula cavity; and
a body opening defined through the body and angularly offset relative to the center line by an angle larger than 0 degrees and smaller than 90 degrees, the body opening providing a fluid path through the body to the cannula;

a first fluid path opening at the cannula cavity positioned to be at least partially aligned with the body opening when the cannula part is positioned within the cannula cavity; and
a sealing positioned to fluidly seal the body opening with the first fluid path opening when the cannula part is positioned within the cannula cavity.

16. The infusion assembly of claim 15 , further wherein the body has a protruding front having a flat surface that is alignable with the first fluid path opening.

17. The infusion assembly of claim 16 , further wherein the body opening is defined through the flat surface.

18. The infusion assembly of claim 17 , further wherein the flat surface is inclined relative to the center line.

19. The infusion assembly of claim 15 , further wherein the access opening comprises a connector needle substantially surrounded by a self closing membrane, wherein when the cannula part is positioned at least partially within the cannula cavity the cannula is fluidly coupled to the connector needle.

Assignees

• Gyrn Steffen
• Hoerdum Elo Lau
• Unomedical As

Inventors

• Gyrn Steffen
• Hørdum Elo Lau

Classifications

• A61M2039/267

  having a sealing sleeve around a tubular or solid stem portion of the connector · CPC title

• A61M2005/1587

  suitable for being connected to an infusion line after insertion into a patient · CPC title

• A61M2005/1585

  Needle inserters · CPC title

• A61M5/158 Primary

  Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} · CPC title

• A61M5/14248

  of the skin patch type · CPC title