Medical valve and method of use

• US 6,132,403 A
• Filed: 04/22/1997
• Issued: 10/17/2000
• Est. Priority Date: 12/18/1991
• Status: Expired due to Fees

• Current Assignee: ICU Medical Incorporated
• Original Assignee: ICU Medical Incorporated
• Inventors: Lopez, George A.
• Primary Examiner(s): Dawson, Glenn K.
• Assistant Examiner(s): Hayes, Michael J
• Application Number:
  US08/837,814
• Time in Patent Office: 1,274 Days
• Field of Search: 604/30, 604/33, 604/246, 604/249, 604/256, 604/283, 604/247, 251/149.1
• US Class Current: 604/249
• CPC Class Codes: A61J 2200/10 Coring prevention means, e.g. for plug or septum piecing members
• CPC Class Codes: A61M 2039/262 having a fluid space within the valve remaining the same upon connection and disconnection, i.e. neutral-drawback valve
• CPC Class Codes: A61M 2039/267 having a sealing sleeve around a tubular or solid stem portion of the connector
• CPC Class Codes: A61M 2205/32 with radio-opaque indicia
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/6063 Optical identification systems
• CPC Class Codes: A61M 39/045 pre-slit to be pierced by blunt instrument
• CPC Class Codes: A61M 39/26 Valves closing automatically on disconnecting the line and opening on reconnection thereof check valves A61M39/24
• CPC Class Codes: A61M 5/14 Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
• CPC Class Codes: F21K 2/00 Non-electric light sources using luminescence using excitation by radioactivity G21H3/02, H01J65/06, H01J65/08; using excitation by an external electromagnetic field or by external corpuscular radiation H01J65/04; Light sources using electrochemiluminescence
• CPC Class Codes: Y10S 604/905 Aseptic connectors or couplings, e.g. frangible, piercable

Abstract

A closed system, needleless valve device includes a generally tubular body defining an internal cavity. On the proximal end of the body there is an opening which is preferably sufficiently large to receive an ANSI standard tip of a medical implement. The distal end of the body has a generally tubular skirt. The valve also includes a hollow spike having a closed tip. The spike includes at least one longitudinal 18-gauge hole located distal the tip, and is seated inside the cavity such that the tip is below the proximal end of the body. An annular support cuff is connected to the spike which seals off a portion of the cavity of the body such that an upper cavity containing the tip is defined. The valve also includes a plastic, resilient silicone seal which fills the upper cavity and opening and covers the tip of the spike so as to present a flush surface. An adaptor enables the valve to be attached to a resealable container.

Claims

1. A method of establishing a fluid flow path through a medical connector having an outer housing with a hollow interior and a proximal end and a distal end, comprising:

positioning a tubular seal within said interior, said seal having a proximal end and a distal end and a tubular wall with inner and outer surfaces defining a passage through said seal along an axial centerline extending through said proximal and distal ends, said seal having an axially uncompressed position in which said passage is closed at said seal proximal end, obstructing fluid flow through said connector, at least a portion of said seal near said seal proximal end filling essentially completely a radial cross-section of said housing near said housing proximal end in said uncompressed position, and at least one of said surfaces having alternating radially inwardly and radially outwardly extending surfaces with respect to said centerline, said wall comprising a plurality of toroidal-shaped elements, said seal having an axially compressed position in which said passage is open at said seal proximal end thereof and said passage is unobstructed, said seal having a first axial height H1 when in its uncompressed position and a second axial height H2 when said seal is in its compressed position;

compressing said seal distally within said housing by inserting a medical implement having an end through said proximal end of said housing into said interior of said housing, said end of said medical implement contacting said seal solely at said proximal end of said seal upon insertion of said implement in said interior of said housing;

changing the height of said seal from H1 to H2, where H1 is greater than H2;

opening said passage through said seal along said centerline when said seal is in its compressed position; and

establishing fluid flow through said housing from said housing proximal end to said housing distal end thereof.

2. The method in accordance with claim 1, wherein said positioning step further comprises the step of positioning said proximal end of said seal flush with said proximal end of said medical connector.