Methods and compositions for increasing lubricity of rubber surfaces
AssigneeUniversity of Cincinnati
InventorsWim J. van Ooij, Dinesh V. Patwardhan
Life of this patent
Estimating the term…
Abstract
Thixotropic, lubricious coatings are provided on the web or surface area surrounding a valve slit or the like in medical, needleless coupling sites. The coating comprises a combination of fluorinated polyalkyl ether and a thixotropic agent such as fumed silica.
Claims28
A method of lubricating a rubber valve surface adapted for frictional contact with a male luer member, said method comprising coating said surface with a lubricious thixotropic composition said lubricious thixotropic composition comprising a fluorinated ether and a thixotropic agent.
A method for lubricating an elastomeric valve surface surrounding a slit formed in said surface, said slit adapted for penetration of a cannula therein, said method comprising coating at least a portion of said surface with a lubricious thixotropic composition comprising a perfluorinated polyalkyl ether and a thixotropic agent.
A method of lubricating a rubber valve surface comprising coating said surface with a lubricious thixotropic composition comprising a fluorinated ether and a thixotropic agent.
A medical coupling site having a valve member, a thin flexible rubber diaphragm having a slit therein positioned in said valve member, a male luer member adapted for repeated, penetrating insertion through said slit into said valve member, a lubricious thixotropic coating composition proximate said slit for lubricating said slit during said repeated penetrating insertion of said mail luer member therethrough, said coating composition comprising a fluorinated ether and a thixotropic agent, said coating composition being immiscible with isopropanol, whereby said diaphragm and said coating composition are capable of withstanding in excess of 100 of said repeated penetrating insertions without failure of said valve member.
Dependencies are inferred from the claim text.