Introducer assembly and method for forming an introducer assembly
View Patent ↗An introducer assembly includes a sheath having a sheath proximal end and distal end, and a passage therethrough. The introducer assembly further includes a handle assembly that is mechanically and/or bonded coupled with a tubular sheath.
1. A method for forming an introducer sheath, the method comprising:
a) providing a first lubricious polymeric tube comprising a sheath extending from a sheath proximal end portion to a sheath distal end portion with an intermediate portion therebetween, the sheath having a first passage therethrough;
b) providing a handle assembly of a second lubricious polymeric material, the handle assembly comprising a second passage having an inner surface;
c) mechanically surface treating at least one of the sheath proximal end portion and the inner surface of the handle assembly, thereby forming an interface at the mechanical surface treatment, wherein the mechanically surface treated interface is of a substantially constant outer diameter at the sheath proximal end portion and of a substantially constant inner diameter at the inner surface of the handle assembly; and
d) bonding the second polymeric material of the handle assembly to the first polymeric tube comprising the sheath, thereby forming an airtight seal between the inner surface of the handle assembly and the sheath proximal end portion at the mechanically surface treated interface with the first and second passages being in aligned communication with each other.
2. The method as recited in claim 1 wherein mechanically surface treating includes mechanically etching at least one of the sheath proximal end portion and the inner surface of the handle assembly.
3. The method as recited in claim 2 wherein mechanically etching includes blasting at least one of the sheath proximal end portion and the inner surface of the handle assembly with sodium bicarbonate.
4. The method as recited in claim 1 wherein at least one of the sheath proximal end portion and the inner surface of the handle assembly is further subjected to a chemical etching treatment.
5. The method as recited in claim 4 wherein chemical etching includes etching with sodium naphthalene/ethylene glycol dimethyl ether solution.
6. The method as recited in claim 1 wherein bonding the handle assembly to the sheath includes overmolding the handle assembly on to the sheath.
7. The method as recited in claim 6 wherein overmolding includes flowing the second polymeric material through holes provided in the sheath.
8. The method as recited in claim 1 including chemically etching at least one of the sheath proximal end portion and the inner surface of the handle assembly after the mechanical surface treatment.
9. The method as recited in claim 8 , further comprising removing the chemical etching.
10. The method as recited in claim 9 , wherein removing the chemical etching includes removing only a portion of the chemical etching.
11. The method as recited in claim. 9 , wherein removing the chemical etching includes mechanically removing the chemical etching.
12. The method as recited in claim 8 further comprising masking a portion of the sheath proximal end portion prior to chemically etching there.
13. The method as recited in claim 1 including mechanically surface treating the sheath proximal end portion with one or more of sand, glass, mica, pumice, or dry ice.
14. A method comprising:
a) providing a first lubricious polymeric tube comprising a sheath extending from a sheath proximal end portion to a sheath distal end portion with an intermediate portion therebetween, the sheath having a first passage therethrough;
b) providing a handle assembly of a second lubricious polymeric material, the handle assembly comprising a second passage having an inner surface;
c) mechanically surface treating a first portion of the sheath proximal end portion to thereby form a first textured surface, wherein the first textured surface is of a substantially constant outer diameter at the sheath proximal end portion and of a substantially constant inner diameter at the inner surface of the handle assembly;
d) chemically surface treating a second portion of the sheath proximal end to thereby form a second textured surface, wherein a contact angle of the second textured surface changes from a natural state of 80° to 70° as a result of the chemical treatment, thereby forming an interface at the first and second textured surfaces; and
e) bonding the second polymeric material of the handle assembly to the first polymeric tube comprising the sheath, thereby forming an airtight seal between the inner surface of the handle assembly and the sheath proximal end portion at the interface with the first and second passages being in aligned communication with each other.
15. The method as recited in claim 14 including mechanically surface treating the first portion of the sheath proximal end portion by mechanically etching the first portion.
16. The method as recited in claim 14 including at least partially removing the second textured surface prior to bonding the handle assembly to the sheath at the interface.
17. The method as recited in claim 16 wherein removing the second textured surface includes mechanically treating the second portion of the sheath proximal end portion after it has been chemically treated.
18. The method as recited in claim 14 including treating at least a portion of the sheath proximal end portion with a third treatment.
19. The method as recited in claim 14 including masking at least a portion of the sheath proximal end portion prior to the second, chemical treatment.
20. The method as recited in claim 14 wherein mechanically treating the first portion includes blasting the sheath proximal end portion with sodium bicarbonate.
21. The method as recited in claim 1 including selecting the first polymeric tube and the second polymeric material from the group consisting of PTFE (polytetrafluoroethylene), FEP (fluorinated ethylene-propylene), nylon, polyurethane, polyethylene, polyamide, polypropylene, polyimide, and mixtures thereof.
22. The method as recited in claim 1 including providing the first polymeric tube and the second polymeric material being of either a same or different polymeric material.
23. The method as recited in claim 14 including selecting the first polymeric tube and the second polymeric material from the group consisting of PTFE (polytetrafluoroethylene), FEP (fluorinated ethylene-propylene), nylon, polyurethane, polyethylene, polyamide, polypropylene, polyimide, and mixtures thereof.
24. The method as recited in claim 14 including providing the first polymeric tube and the second polymeric material being of either a same or different polymeric material.
25. A method for forming an introducer sheath, the method comprising:
a) providing a first fluoro-polymeric tube comprising a sheath extending from a sheath proximal end portion to a sheath distal end portion with an intermediate portion therebetween, the sheath having a first passage therethrough;
b) providing a handle assembly of a second fluoro-polymeric material, the handle assembly comprising a second passage having an inner surface;
c) mechanically surface treating at least one of the sheath proximal end portion and the inner surface of the handle assembly, thereby forming an interface at the mechanical surface treatment, wherein the mechanically surface treated interface is of a substantially constant outer diameter at the sheath proximal end portion and of a substantially constant inner diameter at the inner surface of the handle assembly; and
d) bonding the second fluoro-polymeric material of the handle assembly to the first fluoro-polymeric tube comprising the sheath, thereby forming an airtight seal between the inner surface of the handle assembly and the sheath proximal end portion at the mechanically surface treated interface with the first and second passages being in aligned communication with each other.
26. The method of claim 25 including providing at least one of the first and second fluoro-polymeric materials as PTFE.
27. A method for forming an introducer sheath, the method comprising:
a) providing a first lubricious polymeric tube comprising a sheath extending from a sheath proximal end portion to a sheath distal end portion with an intermediate portion therebetween, the sheath having a first passage therethrough;
b) providing a handle assembly of a second lubricious polymeric material, the handle assembly comprising a second passage having an inner surface;
c) mechanically surface treating at least one of the sheath proximal end portion and the inner surface of the handle assembly by blasting with sodium bicarbonate, wherein the mechanically surface treated interface is of a substantially constant outer diameter at the sheath proximal end portion and of a substantially constant inner diameter at the inner surface of the handle assembly; and
d) bonding the second polymeric material of the handle assembly to the first polymeric tube comprising the sheath, thereby forming an airtight seal between the inner surface of the handle assembly and the sheath proximal end portion at the mechanically surface treated interface with the first and second passages being in aligned communication with each other.
28. A method for forming an introducer sheath, the method comprising:
a) providing a first lubricious polymeric tube comprising a sheath extending from a sheath proximal end portion to a sheath distal end portion with an intermediate portion therebetween, the sheath having a first passage therethrough;
b) providing a handle assembly of a second lubricious polymeric material, the handle assembly comprising a second passage having an inner surface;
c) mechanically surface treating at least one of the sheath proximal end portion and the inner surface of the handle assembly with one or more of sand, glass, mica, pumice, or dry ice, thereby forming an interface at the mechanical surface treatment, wherein the mechanically surface treated interface is of a substantially constant outer diameter at the sheath proximal end portion and of a substantially constant inner diameter at the inner surface of the handle assembly; and
d) bonding the second polymeric material of the handle assembly to the first polymeric tube comprising the sheath, thereby forming an airtight seal between the inner surface of the handle assembly and the sheath proximal end portion at the mechanically surface treated interface with the first and second passages being in aligned communication with each other.