Medical valve and method of use

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.