Dispensing device and method for delivering filamentary material into a patient
There are disclosed various dispensing mechanisms for dispensing filamentary material ( 24 ) through a catheter ( 12 ) into a treatment site of a patient, for example into an aneurysm sack ( 20 ) in a patient's vessel ( 22 ). In one embodiment the assembly ( 100 ) includes a conical material carrier ( 150 ) which is substantially aligned with the dispensing direction, thereby avoiding the need to have a rotating carrier. Another embodiment has a carrier ( 340 ) which is at least partially cylindrical. The carrier ( 150, 340 ) provides for efficient dispensation of filamentary material at substantial dispensing speeds.
1. An apparatus for delivering filamentary material into a patient, the apparatus comprising:
a tubular delivery element having a proximal end, a distal end and a lumen extending within the tubular delivery element from the proximal to the distal ends;
a material receptacle having an aperture for receiving driving fluid into the receptacle, and an outlet coupled to the lumen of the tubular delivery element, the outlet extending in a material dispensing direction of the receptacle; and
a carrier element for carrying filamentary material, the carrier element having an axis substantially aligned with the material dispensing direction of the receptacle and including a body portion around which filamentary material can be wound.
2. The apparatus according to claim 1 , wherein the tubular delivery element includes at least one of a catheter, a cannula and a needle.
3. The apparatus according to claim 1 , wherein the carrier element is precisely aligned with the dispensing direction of the receptacle.
4. The apparatus according to claim 1 , wherein the carrier element is disposed at an angle to the dispensing direction of the receptacle, wherein a side of the carrier element relatively remote from the outlet is disposed at an angle of no more than around 30 degrees.
5. The apparatus according to claim 4 , wherein the side of the carrier element relatively remote from the outlet is disposed at an angle of no more than around 10 degrees.
6. The apparatus according to claim 4 , wherein the side of the carrier element relatively remote from the outlet is disposed at an angle of no more than around 5 degrees.
7. The apparatus according to claim 1 , wherein the body portion of the carrier element is generally round in transverse cross-section.
8. The apparatus according to claim 1 , wherein the body portion of the carrier element is fixed to the receptacle so as to be immovable relative thereto.
9. The apparatus according to claim 8 , wherein the body portion of the carrier element includes a generally conical portion.
10. The apparatus according to claim 9 , wherein the body portion of the carrier element includes a generally cylindrical portion extending longitudinally beyond a narrow end of the conical portion.
11. The apparatus according to claim 1 , wherein the body portion of the carrier element has a generally conical form tapering in a direction towards the outlet.
12. The apparatus according to claim 11 , wherein at least a part of the body portion of the carrier element is conical.
13. The apparatus according to claim 1 , wherein the body portion of the carrier element includes a generally cylindrical portion.
14. The apparatus according to claim 1 , wherein the body portion of the carrier element includes a conical portion and a generally cylindrical portion extending longitudinally beyond a narrow end of the conical portion.
15. The apparatus according to claim 1 , wherein the carrier element includes at least one driving fluid conduit.
16. The apparatus according to claim 15 , wherein the at least one conduit includes at least one aperture disposed at an end of the carrier element furthest from the receptacle outlet.
17. The apparatus according to claim 1 , wherein the receptacle includes a tapering internal wall adjacent the outlet.
18. The apparatus according to claim 1 , including a guiding element at an end of the material carrier closest to the outlet.
19. The apparatus according to claim 18 , wherein the guiding element includes a hole for the passage of filamentary material therethrough.
20. The apparatus according to claim 1 , including filamentary material carried on the material carrier.
21. The apparatus according to claim 20 , wherein the filamentary material carried on the material carrier includes one or more of: SIS, polysaccharide, a biocompatible polymeric thread or other biocompatible material.
22. The apparatus according to claim 20 , wherein the filamentary material carried on the material carrier includes one or more of: woven polyester, polyamide, expanded polytetrafluoroethylene; bioremodelable materials such as: extracellular matrix material including submucosa, renal capsule membrane, dermal collagen, dura mater, pericardium, fascia lata, serosa, peritoneum and basement membrane layers.
23. The apparatus according to claim 20 , wherein the filamentary material is wound on the material carrier from a distal end thereof to a proximal end thereof, the proximal end being closest to the outlet.
24. The apparatus according to claim 23 , wherein at least a part of the filamentary material is wound on the material carrier in sections from the distal end to the proximal end.
25. The apparatus according to claim 20 , wherein at least a part of the filamentary material is wound in conical layers on the carrier.
26. The apparatus according to claim 20 , further comprising a catheter.
27. The apparatus according to claim 26 , wherein the filamentary material has a diameter that is a close fit within the catheter.
28. The apparatus according to claim 1 , wherein the receptacle is at least partially transparent or translucent.
29. The apparatus according to claim 1 , including a fluid supply and pump for pumping driving fluid into the receptacle.
30. An apparatus comprising:
a tubular delivery element having a proximal end, a distal end and a lumen extending within the tubular delivery element from the proximal to the distal ends;
a material receptacle having an aperture for receiving driving fluid into the receptacle, and an outlet coupled to the lumen of the tubular delivery element, the outlet extending in a material dispensing direction of the receptacle;
a filamentary material; and
a carrier element carrying the filamentary material, the carrier element having an axis substantially aligned with the material dispensing direction of the receptacle and including a body portion around which filamentary material is wound;
wherein the filamentary material is wound on the material carrier from a distal end thereof to a proximal end thereof, the proximal end being closest to the outlet;
wherein at least a part of the filamentary material is wound on the material carrier in sections up to a maximum wound diameter on the material carrier from the distal end to the proximal end.
31. An apparatus for delivering filamentary material into a patient, the apparatus comprising:
a tubular delivery element having a proximal end, a distal end and a lumen extending within the tubular delivery element from the proximal to the distal ends;
a material receptacle having an aperture for receiving driving fluid into the receptacle, and an outlet coupled to the lumen of the tubular delivery element, the outlet extending in a material dispensing direction of the receptacle;
a carrier element for carrying filamentary material, the carrier element having an axis substantially aligned with the material dispensing direction of the receptacle and including a body portion around which filamentary material can be wound;
wherein the body portion of the carrier element is fixed to the receptacle so as to be immovable relative thereto; and
a sleeve positioned between the aperture and the carrier element, wherein the sleeve is fluidly coupled to the aperture, and wherein the sleeve defines a plurality of apertures disposed circumferentially around the sleeve.
32. The apparatus according to claim 31 , wherein the sleeve and the carrier element are formed as a single piece.
33. The apparatus according to claim 31 , wherein the body portion of the carrier element is generally round in transverse cross-section.
34. The apparatus according to claim 31 , wherein the body portion of the carrier element is fixed to the receptacle so as to be immovable relative thereto.
35. The apparatus according to claim 31 , wherein the body portion of the carrier element has a generally conical form tapering in a direction towards the outlet.
36. The apparatus according to claim 35 , wherein at least a part of the body portion of the carrier element is conical.
37. The apparatus according to claim 31 , wherein the body portion of the carrier element includes a generally cylindrical portion.
38. The apparatus according to claim 31 , wherein the body portion of the carrier element includes a conical portion and a generally cylindrical portion extending longitudinally beyond a narrow end of the conical portion.
39. The apparatus according to claim 31 , wherein the carrier element includes at least one driving fluid conduit.
40. The apparatus according to claim 39 , wherein the at least one conduit includes at least one aperture disposed at an end of the carrier element furthest from the receptacle outlet.
41. The apparatus according to claim 31 , wherein the receptacle includes a tapering internal wall adjacent the outlet.
42. The apparatus according to claim 31 , including a guiding element at an end of the material carrier closest to the outlet.