Assembly of semi-disposable ventilator breathing circuit tubing with releasable coupling

• US 5,864,938 A
• Filed: 04/03/1997
• Issued: 02/02/1999
• Est. Priority Date: 09/15/1994
• Status: Expired due to Term

• Current Assignee: Nellcor Puritan Bennett Incorporated (Medtronic Plc)
• Original Assignee: Nellcor Puritan Bennett Incorporated (Medtronic Plc)
• Inventors: Gansel, Guy, Takabayashi, Susumu
• Primary Examiner(s): Bryant, David P.
• Application Number:
  US08/832,898
• Time in Patent Office: 670 Days
• Field of Search: 29/450, 29/451, 29/506, 29/237, 285/381.4, 285/148.19, 285/148.11, 285/423, 285/226, 285/332, 285/247, 285/246, 285/235, 285/256, 285/334.5, 285/903, 285/328, 285/921, 138/109, 138/121
• US Class Current: 29/506
• CPC Class Codes: A61M 16/0816 Joints or connectors
• CPC Class Codes: A61M 16/0875 Connecting tubes
• CPC Class Codes: F16L 25/0036 Joints for corrugated pipes
• CPC Class Codes: F16L 33/222 the external piece comprising segments pressed against the hose by wedge shaped elements
• CPC Class Codes: Y10S 285/903 Corrugated
• CPC Class Codes: Y10S 285/921 Snap-fit
• CPC Class Codes: Y10T 29/49909 Securing cup or tube between axially extending concentric annuli

Abstract

A method for coupling ventilator breathing circuit tubing to a respiratory ventilator using a compression coupler. The tubing has a corrugated or ribbed portion and a non-corrugated cuff. The cuff is inserted into the coupler, which is in turn coupled to the ventilator. The coupler has inner and outer tubular members that compressively engage the cuff between them when they are rotated with respect to one another.

Claims

1. A method for coupling ventilator breathing circuit tubing to a respiratory ventilator using a compression coupler, said ventilator breathing circuit tubing comprising a first tubing portion unitarily formed with a second tubing portion which is longitudinally co-extensive with said first tubing portion, said first tubing portion having an elongated tubular corrugated wall, said second tubing portion having a tubular non-corrugated wall extending from an end of said first tubing portion and increasing in diameter and terminating in a circumferential lip, said compression coupler coupled to said respiratory ventilator and comprising an inner tubular coupling member having an outer surface, and an outer tubular coupling member having an inner surface, said inner and outer surfaces movable in a radial direction relative to one another in response to movement of said inner and outer tubular members in an axial direction relative to one another, the method comprising the steps of:

inserting said second tubing portion into said outer tubular coupling member, said second tubing portion contacting said inner surface of said outer tubular coupling member;

inserting said inner tubular coupling member into said second tubing portion, said second tubing portion contacting said outer surface of said inner tubular coupling member; and

engaging said inner tubular coupling member with said outer tubular coupling member by moving said inner and outer tubular coupling members in an axial direction with respect to one another, whereby said tubular coupling members move in a radial direction with respect to one other to compressively engage said second tubing portion between said outer surface of said inner tubular coupling member and said inner surface of said outer tubular coupling member.

2. The method recited in claim 1, wherein:

said inner and outer tubular coupling members are threaded; and

said engaging step comprises threadably engaging said inner tubular coupler member with said outer tubular coupling member.

3. The method claimed in claim 1, wherein said ventilator breathing circuit tubing is made of a thermoplastic elastomer.

4. The method claimed in claim 1, wherein said ventilator breathing circuit tubing is extruded.

5. The method claimed in claim 1, wherein said ventilator breathing circuit tubing is made of KRATON.

6. The method claimed in claim 1, wherein said ventilator breathing circuit tubing is made of a material not adhesively bondable to an elastomeric material.

7. The method claimed in claim 1, wherein said ventilator breathing circuit tubing is made of a material containing a leaching agent that degrades adhesive bonds.