Polyurethane/polyisoprene blend catheter

A - Human Necessities – 61 – L

Patent

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Details

A61L 29/12 (2006.01) C08L 9/00 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2729673

A medical article, such as a catheter, is formed from a blend of polyurethane and synthetic polyisoprene (SPIR). The blended medical article is preferably selected and prepared to be relatively rigid at room temperature and relatively flexible at body temperature. An intermittent catheter made from the blend provides a degree of stiffness for its insertion into the patient at room temperature. The catheter becomes softer, and therefore more comfortable, at warmer temperatures (e.g., body temperature) which reduce discomfort after insertion. Optionally, the catheter or a portion thereof can have a hydrophilic coating as to avoid the need for external lubricants. Advantageously, the blended catheter can meet the stiffness, tensile strength, and coefficient of fric-tion requirements of intermittent catheterization applications while avoiding the risk of toxic or allergic reactions in sensitive users.

Linvention concerne un article médical, tel quun cathéter, fabriqué à partir dun mélange de polyuréthanne et de polyisoprène synthétique (SPIR). Cet article médical mélangé est de préférence sélectionné et préparé pour être relativement rigide à température ambiante et relativement souple à température corporelle. Un cathéter intermittent fabriqué à partir de ce mélange fournit un degré de rigidité permettant son insertion dans le corps du patient à température ambiante. Le cathéter devient plus souple, et donc plus confortable, à des températures plus élevées (à température corporelle, par exemple) ce qui réduit la gène après linsertion. Facultativement, le cathéter ou une partie de celui-ci peut comporter un revêtement hydrophile de sorte à éliminer le recours aux lubrifiants externes. Le cathéter mélangé selon linvention permet de répondre avantageusement aux exigences de rigidité, de résistance à la traction et de coefficient de frottement des applications de cathétérisme intermittent, et déviter en même temps le risque de réactions toxiques ou allergiques chez des patients sensibles.

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