Male telescope catheter

• US 20090137985A1
• Filed: 10/25/2005
• Published: 05/28/2009
• Est. Priority Date: 10/25/2004
• Status: Active Grant

• Current Assignee: Coloplast A/S
• Original Assignee: Coloplast A/S
• Inventors: Christensen, Jens Berg, Tanghoej, Allan
• Granted Patent: US 8,361,057 B2
• Time in Patent Office: Days
• US Class Current: 604/544
• CPC Class Codes: A61M 2025/0004 having two or more concentrically arranged tubes for forming a concentric catheter system
• CPC Class Codes: A61M 2025/0175 having telescopic features, interengaging nestable members movable in relations to one another
• CPC Class Codes: A61M 25/00 Catheters; Hollow probes dilators A61M29/00; peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00 ; for measuring or testing A61B; materials for catheters A61L29/00
• CPC Class Codes: A61M 25/0017 specially adapted for long-term hygiene care, e.g. urethral or indwelling catheters to prevent infections
• CPC Class Codes: A61M 25/0054 with regions for increasing flexibility

Abstract

The present invention relates to a catheter, especially an expandable catheter with a transition between the individual sections allowing insertion of the transition into urethra. In particular the present invention relates to a catheter which is operable between a collapsed configuration for storage and transportation and an expanded configuration for draining fluid from a body via a conduit which extends axially in a longitudinal direction from a proximal end to an opposite distal end, the catheter comprising: a proximal section, adapted to be fully inserted into a urinary channel of the body and forming a proximal part of the conduit which part extends axially between the proximal end and a first transition end of the proximal section, and a distal section, adapted to be at least partially inserted into the urinary channel and forming a distal part of the conduit which part extends axially between a second transition end of the distal section and the distal end, an insertable part of the first transition end being dimensioned to enable its positioning inside a receiving portion of the distal part of the conduit to enable axial movement of the sections relative to each other to operate the catheter between the collapsed configuration and the expanded configuration of the catheter, wherein the sections comprise cooperating coupling structures to support the catheter in the expanded configuration.

Claims

1. :

A catheter which is operable between a collapsed configuration for storage and transportation and an expanded configuration for draining fluid from a body via a conduit which extends axially in a longitudinal direction from a proximal end to an opposite distal end, the catheter comprising;

a proximal section, adapted to be fully inserted into a urinary channel of the body and forming a proximal part of the conduit which part extends axially between the proximal end and a first transition end of the proximal section, and

a distal section, adapted to be at least partially inserted into the urinary channel and forming a distal part of the conduit which part extends axially between a second transition end of the distal section and the distal end,

the first transition end being dimensioned to enable its positioning inside a receiving portion of the distal part of the conduit to enable axial movement of the sections relative to each other to operate the catheter between the collapsed configuration and the expanded configuration of the catheter, wherein the sections comprise cooperating coupling structures to support the catheter in the expanded configuration.

2. :

A catheter according to claim 1, wherein the sections are provided so that a first longitudinal directed force required for moving the catheter from an expanded position to a collapsed position is larger than a second longitudinal directed force required for at least one of the proximal section and the distal section to bend.

3. :

A catheter according to claim 1, wherein the sections are provided so that a first longitudinal directed force required for moving the catheter from an expanded position to a collapsed position is smaller than a second longitudinal directed force required for at least one of the proximal section and the distal section to bend.

4. :

A catheter according to claim 1, wherein the proximal section forms a first outer surface with a circumference which increases from the proximal end towards the first transition end.

5. :

A catheter according to claim 1, wherein the distal section forms a second outer surface with a circumference which decreases from the distal end towards the second transition end.

6. :

A catheter according to claim 4, wherein the first outer surface forms a first angle to the longitudinal direction, and the second outer surface forms a second angle to the longitudinal direction, the first angle being at least of the size of the second angle.

7. :

A catheter according to claim 1, wherein one of the proximal and distal sections comprises a protrusion cooperating in the expanded configuration with a depression of the other one of the proximal and distal sections.

8. :

A catheter according to claim 7, wherein the depression forms a circumferentially extending slot in an outer surface of the section in question.

9. :

A catheter according to claim 8, wherein the slot is provided in an outer surface of the proximal section.

10. :

A catheter according to claim 1, wherein;

the distal section comprises an inner surface portion which forms a wall of the conduit in the second transition end, which inner surface portion forms a distance, a, to a centre axis, and

the proximal section comprises an outer surface portion being adjacent to the insertable part, which outer surface portion forms a distance, b, to the centre axis,

wherein b is larger than a.

11. :

A catheter according to claim 1, wherein the proximal section comprises an outer surface with a first surface portion with a first circumference which first surface portion, in the longitudinal direction, is followed by a second surface portion with a second circumference which is larger than the first circumference.

12. :

A catheter according to claim 11, wherein the second surface portion, in the longitudinal direction is followed by a third surface portion forming the slot and having a third circumference being smaller than the second circumference.

13. :

A catheter according to claim 12, wherein the slot is followed by a fourth surface portion with a fourth circumference being larger than the circumference(s) of the third surface portion.

14. :

A catheter according to claim 8, wherein the protrusion forms a circumferentially extending key adapted to cooperate with the slot in the expanded configuration.

15. :

A catheter according to claim 14, wherein the key forms a fifth surface portion which protrudes from an inner surface of the distal section.

16. :

A catheter according to claim 15, wherein the fifth surface portion has a circumference which is smaller than the circumference of the remaining inner surface of the distal section.

17. :

A catheter according to claim 15, wherein the fifth surface portion has a circumference which is smaller than the circumferences of the second and fourth surface portions.

18. :

A catheter according to claim 15, wherein a gap is formed between the third surface portion and the fifth surface portion in the expanded configuration.

19. :

A catheter according to claim 15, wherein a gap is formed between the first surface portion and the fifth surface portion in the collapsed configuration claim 20;

A catheter according to claim 18, wherein the gap contains a hydrophilic fluid.

21. :

A catheter according to claim 1, wherein at least the transition ends of the sections are circular in a cross-section perpendicular to the longitudinal direction.

22. :

A catheter according to claim 1, wherein the proximal section comprises;

a tubular member forming the proximal end of the catheter, and

a sleeve with an outer surface with a sixth surface portion and a seventh surface portion, the circumference of the sixth surface portion being larger than the circumference of the seventh surface portion, the sleeve being inserted into a conduit so that the seventh surface portion is in contact with an inner surface of the tubular member and the sixth surface portion forms an outer surface of the proximal section.

23. :

A catheter according to claim 22, wherein the sixth surface portion has a larger circumference than the outer surface of the tubular member.

24. :

A catheter according to claim 22, wherein the seventh surface portion comprises an enlarged surface portion in which the circumference is larger than in the remaining part of the seventh surface portion.

25. :

A catheter according to claim 24, wherein the enlarged surface portion deforms the outer surface of the tubular member and forms a protrusion on that surface.

26. :

A catheter according to claim 1, wherein the distal section comprises;

a tubular member forming the distal end of the catheter, and

a sleeve with an outer surface with a eighth surface portion and a ninth surface portion, the circumference of the eighth surface portion being larger than the circumference of the ninth surface portion, the sleeve being inserted into a conduit so that the ninth surface portion is in contact with an inner surface of the tubular member and the eighth surface portion forms an outer surface of the proximal section.

27. :

A catheter according to claim 26, wherein sleeve forms the second transition end of the distal section and wherein the eighth surface portion has a circumference which decreases towards the second transition end.

28. :

An expandable catheter comprising

a proximal section (2) and a distal section (1), both sections forming a part of a conduit,

the proximal section (2) comprising an insertion end (6) for insertion into an opening with an aperture for draining a fluid into the conduit, the conduit extending towards an opposite transition end (5), the proximal section having an outer circumference which increases (A) towards the transition end (5), and

the distal section (1) comprising a transition end (3) receiving fluid from the transition end (3) of the proximal section into the conduit when the catheter is expanded, the conduit extending toward an opposite guiding end (4), the distal section having an outer circumference which decreases (B) towards a transition end (3), the transition end of the proximal section being dimensioned to enable its positioning inside the conduit of the distal section to enable movement of the sections relative to each other.

29. :

A catheter according to claim 28, wherein the outer circumference of the transition end of the proximal section is larger than the inner circumference of the transition end of the distal section.

30. :

A catheter according to claim 28, wherein angle α

(7) is about 90°

.

31. :

A catheter according to claim 28, wherein the elasticity of the transition end of the proximal section is lower than the elasticity of the remaining part of the proximal section.

32. :

A catheter according to claim 28, wherein the elasticity of the transition end of the distal section is lower than the elasticity of the remaining part of the distal section.

33. :

A catheter according to claim 28, wherein decreased elasticity is obtained by an increased wall thickness.

34. :

A catheter according to claim 28, wherein the proximal part further comprises a circular protrusion.

35. :

A catheter according to claim 28, wherein the proximal transition end is wedged inside the distal transition end when the catheter is fully expanded.

36. :

A catheter according to claim 28, wherein the elasticity of the distal section is different from the elasticity of the proximal section

37. :

A catheter according to claim 36, wherein the proximal section has an elasticity comparable to that known from common catheters and the distal section has a lower elasticity than the proximal section.