PEEL-AWAY INTRODUCER AND METHOD FOR MAKING THE SAME

• US 20090218728A1
• Filed: 01/29/2009
• Published: 09/03/2009
• Est. Priority Date: 09/07/2004
• Status: Active Grant

• Current Assignee: B Braun Medical Incorporated (B. Braun Holding GmbH & Co. KG)
• Original Assignee: B Braun Medical Incorporated (B. Braun Holding GmbH & Co. KG)
• Inventors: Moyer, Robert
• Granted Patent: US 7,887,733 B2
• Time in Patent Office: Days
• US Class Current: 264/263
• CPC Class Codes: A61B 17/3415 for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 17/3439 with means for changing the inner diameter of the cannula, e.g. expandable A61B17/3423, A61B17/3431 take precedence; catheters A61M25/0662
• CPC Class Codes: A61M 25/0009 Making of catheters or other medical or surgical tubes
• CPC Class Codes: A61M 25/0668 splittable, tear apart

Abstract

A device and method of making a peel-away introducer sheath adapted for use in transcutaneous insertions of medical instrumentation according to an embodiment of the present invention includes, forming at least two anchor apertures in an end portion of a peel-away sheath tube, molding a fitting around the end portion by passing molten resin into a fitting mold and through the at least two anchor apertures, and cooling the resin within the mold and the at least two anchor apertures to thereby fasten the fitting to the sheath tube.

Claims

1. A method of manufacturing a peel-away introducer sheath adapted for use in the transcutaneous insertion of medical instrumentation, said method comprising the steps of:

forming at least two anchor apertures in an end portion of a peel-away sheath tube;

molding a fitting around the end portion by passing molten resin into a fitting mold and through the at least two anchor apertures; and

cooling the resin within the mold and the at least two anchor apertures to thereby fasten the fitting to the sheath tube.

2. The method of claim 1, wherein the molding step forms a contiguous mechanical connection between the resin mold and the at least two anchor apertures.

3. The method of claim 1, wherein the at least two anchor apertures have a central axis substantially perpendicular to a longitudinal axis of the sheath tube.

4. The method of claim 1, wherein the forming step comprises forming six anchor apertures.

5. The method of claim 1, wherein the fitting defines an opening having a radius substantially similar to the radius of the sheath tube.

6. The method of claim 1, wherein the sheath tube is scored on the end portion.

7. The method of claim 1, wherein the sheath is one of a thermoset or thermoplastic resin.

8. The method of claim 1, wherein the sheath is polytetrafluoroethylene.

9. The method of claim 1, wherein the fitting comprises at least two wing portions attached to a central body having at least one line of weakness.

10. The method of claim 1, wherein the molten resin is an injection-moldable thermoplastic resin.

11. The method of claim 1, wherein the molding step further comprises the step of inserting an inner mold portion into the end portion of the sheath, the mold portion having at least two channels defining respective flow paths, each of the flow paths in fluid communication with an aperture.

12. The method of claim 11, wherein the channels are defined by radially outwardly projecting longitudinal ridges along the inner mold portion.

13. The method of claim 12, wherein the ridges are tapered.

14. The method of claim 11 further comprising the step of forming an outer mold portion around the inner mold portion inserted into the end portion of the sheath tube.

15. The method of claim 14, wherein the outer mold portion is adapted to insert a resealable membrane in the fitting.

16. A method for making a tear-away introducer having a sheath tube splitable along at least one longitudinal axis of the tube and a fitting in a contiguous mechanical connection with the sheath, the method comprising the steps of:

forming at least two anchor apertures in an end portion of a peel-away sheath tube;

inserting an inner mold portion into the end portion of the sheath, the mold portion having at least two channels defining respective flow paths;

aligning the channels of the inner mold portion with the anchor apertures of the sheath whereby each of the flow paths are in fluid communication with an aperture;

forming an outer mold portion around the inner mold portion inserted into the end portion of the sheath tube;

passing molten resin into the outer mold portion whereby molten resin flows through the flow paths and the respective anchor aperture; and

cooling the resin within the outer mold portion and the at least two anchor apertures to thereby fasten the fitting to the sheath tube in a contiguous mechanical connection.