Medical devices with tubular reinforcement
A method of making a medical device includes: obtaining an assembly having a tubular structure, a polymeric tube, and a stretched rod, wherein the stretched rod is inside a lumen of the polymeric tube, and wherein the polymeric tube is between the tubular structure and the stretched rod; and expanding the stretched rod to urge the polymeric tube radially outward towards an inner surface of the tubular structure.
1. A method of making a medical device, the method comprising:
obtaining an assembly having a tubular structure, a polymeric tube, and a stretched rod, wherein the stretched rod is inside a lumen of the polymeric tube, and wherein the polymeric tube is between the tubular structure and the stretched rod; and
expanding the stretched rod to urge the polymeric tube radially outward towards an inner surface of the tubular structure while the tubular structure is surrounding at least a part of the polymeric tube;
wherein the method further comprises:
placing a jacket around the tubular structure;
urging the jacket radially inward towards the tubular structure; and
melting some materials of the jacket so that the materials flow into openings at a wall of the tubular structure.
2. The method of claim 1 , wherein the act of expanding the stretched rod comprises heating the stretched rod.
3. The method of claim 1 , wherein at least a part of the assembly is formed by inserting the stretched rod into the lumen of the polymeric tube.
4. The method of claim 1 , wherein the act of expanding causes the stretched rod to become an expanded rod; and
wherein the method further comprises stretching the expanded rod while the expanded rod is in the lumen of the polymeric tube, and removing the rod from the polymeric tube after the act of stretching is performed.
5. The method of claim 1 , wherein the polymeric tube is a liner.
6. The method of claim 1 , wherein the polymeric tube comprises a polymer.
7. The method of claim 6 , wherein the act of expanding the stretched rod causes the polymeric tube to secure to the inner surface of the tubular structure.
8. The method of claim 1 , wherein the polymeric tube comprises FEP, PTFE, PVDF, or PFA.
9. The method of claim 1 , wherein the tubular structure is a hypotube of a catheter.
10. The method of claim 1 , wherein the polymeric tube is made from a material having a lower melting point than a material of the stretched rod.
11. A method of making a medical device, the method comprising:
obtaining an assembly having a tubular structure, a polymeric tube, and a stretched rod, wherein the stretched rod is inside a lumen of the polymeric tube, and wherein the polymeric tube is between the tubular structure and the stretched rod; and
expanding the stretched rod to urge the polymeric tube radially outward towards an inner surface of the tubular structure while the tubular structure is surrounding at least a part of the polymeric tube
wherein the polymeric tube comprises an adhesive layer, and wherein the act of expanding the stretched rod causes the polymeric tube to secure to the inner surface of the tubular structure via the adhesive layer.
12. The method of claim 11 , further comprising:
placing a jacket around the tubular structure; and
urging the jacket radially inward towards the tubular structure.
13. The method of claim 12 , wherein the act of urging the jacket radially inward comprises placing a heat-shrink tube around the jacket, and heating the heat-shrink tube to cause the heat-shrink tube to shrink radially inward, thereby pushing the jacket towards the tubular structure.
14. The method of claim 12 , further comprising melting some materials of the jacket so that the materials flow into openings at a wall of the tubular structure.
15. The method of claim 12 , wherein at least a part of the assembly is formed by inserting the stretched rod into the lumen of the polymeric tube, and wherein the jacket is placed around the tubular structure after the stretched rod is inserted into the lumen of the polymeric tube.
16. A method of making a medical device, the method comprising:
obtaining an assembly having a tubular structure, a polymeric tube, and a stretched rod, wherein the tubular structure comprises a first end, a second end, and a tubular body extending between the first end and the second end, wherein the tubular structure comprises a plurality of openings extending through a wall-thickness of the tubular structure, wherein the stretched rod is inside a lumen of the polymeric tube, wherein the stretched rod comprises a rod that has been stretched before the stretched rod is incorporated into the assembly, and wherein the polymeric tube is radially between the tubular structure and the stretched rod; and
expanding the stretched rod to urge the polymeric tube radially outward towards an inner surface of the tubular structure while the tubular structure surrounds at least a part of the polymeric tube, wherein the act of expanding causes the stretched rod to become an expanded rod;
wherein the act of expanding causes the polymeric tube to be pressed by the expanded rod against the inner surface of the tubular structure.
17. The method of claim 16 , wherein the act of expanding the stretched rod comprises heating the stretched rod.
18. The method of claim 16 , further comprising:
placing a jacket around the tubular structure; and
urging the jacket radially inward towards the tubular structure.
19. The method of claim 18 , wherein the act of urging comprises using a heat-shrink tube that is placed around the jacket, and wherein the method further comprises removing the heat-shrink tube after the jacket is urged towards the tubular structure.
20. The method of claim 18 , further comprising melting some materials of the jacket so that the materials flow into the openings of the tubular structure.
21. The method of claim 16 , wherein the act of expanding the stretched rod causes the polymeric tube to secure to the inner surface of the tubular structure.
22. The method of claim 18 , wherein at least a part of the assembly is formed by inserting the stretched rod into the lumen of the polymeric tube, and wherein the jacket is placed around the tubular structure after the stretched rod is inserted into the lumen of the polymeric tube.
23. The method of claim 16 , further comprising stretching the expanded rod while the expanded rod is in the lumen of the polymeric tube, and removing the rod from the polymeric tube after the act of stretching is performed.
24. The method of claim 16 , wherein the polymeric tube comprises FEP, PTFE, PVDF, or PFA.
25. The method of claim 16 , wherein the polymeric tube comprises an adhesive layer.
26. The method of claim 25 , wherein the act of expanding the stretched rod causes the polymeric tube to secure to the inner surface of the tubular structure via the adhesive layer.
27. The method of claim 16 , wherein the tubular structure is a hypotube of a catheter.
28. The method of claim 16 , wherein the polymeric tube is made from a material having a lower melting point than a material of the stretched rod.