Silicone catheter and process for manufacturing same

• US 3,926,705 A
• Filed: 07/25/1974
• Issued: 12/16/1975
• Est. Priority Date: 07/25/1974
• Status: Expired due to Term

• Current Assignee: Donald A. Todd
• Original Assignee: Donald A. Todd
• Inventors: Todd, Donald A.
• Primary Examiner(s): Drummond, Douglas J.
• Assistant Examiner(s): Simmons, David A.
• Application Number:
  US05/491,623
• Time in Patent Office: 509 Days
• Field of Search: 156/191,155,250,251,252,261,263,293,294,108,289 128/349B,349R 264/316-317,221,DIG.44,163,154 117/4,6,8 83/16
• US Class Current: 156/155
• CPC Class Codes: A61M 25/0015 Making lateral openings in a catheter tube, e.g. holes, slits, ports, piercings of guidewire ports; Methods for processing the holes, e.g. smoothing the edges
• CPC Class Codes: A61M 25/0017 specially adapted for long-term hygiene care, e.g. urethral or indwelling catheters to prevent infections
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 25/1036 Making parts for balloon catheter systems, e.g. shafts or distal ends A61M25/1029 takes precedence
• CPC Class Codes: Y10T 156/1057 Subsequent to assembly of laminae

Abstract

An improved catheter comprising a tubular body portion comprising a primary lumen and an inflation lumen and an outer covering, a portion of which is inflatable to form an anchoring bubble, wherein a layer of thermoplastic material is applied around the tubular catheter body in the region underlying the anchoring bubble, the thermoplastic layer containing a hole through which an inflation medium can be injected from the inflation lumen to expand a portion of the outer covering to form the anchoring bubble and the thermoplastic layer being composed of a material to which the outer covering does not adhere.

Claims

1. FORMING A TUBULAR BODY COMPRISING A PRIMARY LUMEN AND AN INFLATION LUMEN;

2. The method of claim 1 wherein the step of forming said tubular body comprises extruding a silicone tube comprising a primary lumen and an inflation lumen.

3. APPLYING A THIN LAYER OF THERMOPLASTIC MATERIAL AROUND THE EXTERIOR OF SAID TUBE TO OVERLAP SAID FIRST HOLE;

4. The method of claim 1 wherein the step of applying an outer layer of covering material comprises dipping said tube in a silicone solution to form an outer layer and drying said outer layer.

5. FORMING A SECOND HOLE IN THE COVERED TUBE TO PERMIT COMMUNICATION BETWEEN SAID PRIMARY LUMEN AND THE EXTERIOR OF SAID COVERED TUBE;

AND

6. The method of claim 1 wherein the step of applying a thin layer of thermoplastic material comprises applying a thin layer of thermoplastic tape whose adhesive side adheres to said tubular body, whose opposite side does not adhere to the outer layer of covering material, and which melts at a temperature significantly lower than that of said outer layer of covering material.

7. The method of claim 1 wherein the step of applying a thin layer of thermoplastic material comprises applying a thin layer of unreinforced tape of a member selected from the group consisting of polyethylene and polypropylene.

8. The method of claim 1 wherein the step of forming said tubular body comprises extruding a silicone tube comprising a primary lumen and an inflation lumen and the step of applying an outer layer of covering material comprises dipping said tube in a silicone solution to form an outer layer and drying said outer layer.

9. The method of claim 6 wherein the step of forming said tubular body comprises extruding a silicone tube comprising a primary lumen and an inflation lumen and the step of applying an outer layer of covering material comprises dipping said tube in a silicone solution to form an outer layer and drying said outer layer.