Joining element
View Patent ↗Disclosed is a joining element ( 10 ), especially a suture material for surgical use. The joining element ( 10 ) is composed of a first material ( 12 ) that is essentially rigid during impingement by a relatively short-lasting tensile load on opposite sides as well as a second material ( 11 ) which is connected to the first material. The second material is substantially rigid during impingement by said tensile load on opposite sides while contracting slowly during a second period of time that is longer than the first period of time.
1. A joining element elongate along a longitudinal direction, the joining element comprising:
a first material comprising a plurality of threads, the first material elongate along the longitudinal direction; and
a second material that extends through the first material along the longitudinal direction, the second material having a volume capable of swelling along a direction transverse to the longitudinal direction, which in turn results in a longitudinal contraction against the first material.
2. The joining element of claim 1 , wherein the first material surrounds the second material.
3. The joining element of claim 1 wherein the second material comprises:
a core having a filamentary polymer material made from a thermoplastic elastomer, or a cross-linked elastomer, or a gel, wherein the core is incorporated with
at least a partially water soluble substance.
4. The joining element of claim 3 , wherein the core further comprises a tube or membrane, and wherein the tube or membrane is narrowed at regular intervals in order to form segmented chambers.
5. The joining element according to claim 3 , wherein the core comprises silicone incorporated with salt crystals.
6. The joining element according to claim 5 , wherein the core further comprises stitch threads that extend substantially along the longitudinal direction.
7. The joining element according to claim 5 , wherein the salt crystals have a particle size less than 70 micrometers.
8. The joining element according to claim 7 , wherein the salt crystals have a particle size from about 100 nanometers to about 50 micrometers.
9. The joining element according to claim 7 , wherein the threads are multifilament threads.
10. The joining element according to claim 5 , wherein the core is extruded.
11. The joining element according to claim 5 , wherein the salt crystals have a concentration of between 5 percent and 75 percent by volume in the silicone.
12. The joining element according to claim 5 , wherein the core defines a silicone to salt ratio within the range between and including 0.7:1 and 2:1.
13. The joining element according to claim 5 , wherein the salt is a phosphate salt.
14. The joining element of claim 1 wherein the second material is surrounded by a semipermeable or a selectively permeable or a diffusion limiting membrane or an osmosis membrane.
15. The joining element of claim 1 , wherein the short-lasting tensile load builds up and/or abates over a first period of time of less than 1 minute.
16. The joining element of claim 15 , wherein the joining element contracts slowly over a second period of time and the first period of time is shorter than the second period of time by at least two orders of magnitude.
17. The joining element of claim 1 , wherein the joining element slowly contracts or tensions when impinged below a threshold tension, but is substantially rigid when subjected to a short-lasting tensile load above the threshold tension.
18. The joining element of claim 1 , wherein the second material comprises several interwoven swellable threads, wherein each in turn is surrounded by the first material.
19. The joining element of claim 1 , wherein the second material comprises a swelling material, in particular a hygroscopic material, or a hydrophobic material with a hygroscopic inclusion.
20. The joining element of claim 19 , wherein the second material is surrounded by a semipermeable membrane or a diffusion limiting membrane.
21. The joining element of claim 19 , wherein the second material comprises a textile structure, in particular a woven or braided structure, that surrounds and encloses the swelling material or that is surrounded and is enclosed by the swelling material.
22. The joining element of claim 19 , wherein the first material comprises a multiplicity of core threads that are each surrounded by a swellable component of the second material, where a membrane either surrounds each core thread individually, or surrounds all of the core threads, or surrounds all of the core threads with a braided multifilament thread structure.
23. The joining element of claim 19 , wherein the second material contains one or more active substances that can be released by osmosis or diffusion into the environment, or wherein the second material contains one or more active substances in active substance vesicles that can be driven out of the core by the pressure that acts on the active substance vesicles and that increases under the swelling of the second material.
24. A prosthetic material comprising at least one of the joining element of claim 1 , wherein the prosthetic material includes a textile structure that is at least one of threaded, nonwoven, woven, braided, knitted, embroidered, and a mesh.
25. The joining element of claim 1 wherein the second material comprises:
an osmotic core having a tube in which an expanding substance or an osmotically active substance is filled.
26. The joining element of claim 1 wherein the second material comprises:
a core being delimited by an elastically, plastically or geometrically radially extensible membrane, wherein the core further comprises a gel filling or a matrix filling.
27. The joining element of claim 1 , wherein the joining element defines a central axis extending in the longitudinal direction, and wherein the joining element defines a thread angle, the thread angle measuring the orientation of the threads of the first material with respect to the central axis along the longitudinal direction of the joining element.
28. The joining element of claim 27 , wherein the thread angle of the joining element increases when the volume of the second material swells.
29. The joining element according to claim 27 , wherein the thread angle remains substantially constant when the joining element is subjected to the short lasting tensile load.
30. The joining element according to claim 1 , wherein the plurality of threads are braided.
31. The joining element according to claim 1 , wherein the plurality of threads define a mesh-like structure.
32. The joining element according to claim 1 , wherein the plurality of threads are arranged in a helical pattern around the second material.
33. The joining element according to claim 1 , defining an outer diameter between approximately greater than 0.7 mm and approximately 1.1 mm.
34. The joining element according to claim 1 , wherein the first material is substantially rigid when impinged by a short-lasting tensile load.
35. A method for treating tissue or prosthetic material comprising:
suturing the tissue or prosthetic material with the joining element of claim 1 .
36. The method of claim 35 , wherein anchors, secured fixedly or slidingly, are provided to provide the joining element, which shortens over the course of time, as a loop or as a connection between anchor retention plates (parachutes) or as a connection between several anchors.
37. A tissue implant comprising at least one of the joining elements of claim 1 .
38. The tissue implant of claim 37 , wherein the implant comprises a pouch configured to enclose an organ.
39. The tissue implant of claim 37 , wherein the implant is adapted for the closure of fascial gaps.
40. The tissue implant of claim 37 , wherein the implant comprises a bridging graft for tendons or fascia defects.
41. The tissue implant of claim 37 , wherein the implant is adapted for closure of skin defects.
42. The tissue implant of claim 37 , wherein the implant is configured to serve as a cuff around vessels or organs.
43. The tissue implant of claim 37 , wherein the implant is adapted for treatment in an external application.
44. A tension thread, for producing a tension mesh or a textile membrane, comprising at least one of the joining element of claim 1 .