Flexible introducer sheath with varying durometer

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/06 (2006.01) A61L 29/04 (2006.01) A61L 29/06 (2006.01)

Patent

CA 2523487

A flexible kink-resistant introducer sheath (10). The introducer sheath includes an inner liner (31), a coil (33) and an outer tube (20). The inner liner includes a passageway (30) extending longitudinally therethrough, where a catheter can be advanced through the passageway. The coil (33) has a plurality of turns positioned longitudinally and compression fitted around the inner liner (31), where the turns have a predetermined spacing therebetween. The outer tube (20) is positioned longitudinally around the coil (33) and the inner liner (31), and is connected to the inner liner through the spaces between the turns. A diameter difference between the inner liner and the catheter is in a range of about 0.0005 to about 0.004 inch (0.013 to about 0.10 mm).

L'invention concerne une gaine d'introducteur résistant au pliage souple (10). Ladite gaine d'introducteur comporte un revêtement interne (31), un enroulement (33) et un tube externe (20). Ledit revêtement interne comprend une voie de passage (30) s'étendant longitudinalement, un cathéter pouvant être déplacé à travers la voie de passage. L'enroulement (33) présente une pluralité de tours placés longitudinalement et une compression fixée autour du revêtement interne (31), lesdits tours possédant un espacement prédéterminé entre eux. Le tube externe (20) est placé longitudinalement autour de la bobine (33) et du revêtement interne (31), et il est relié au revêtement interne par le biais des espaces entre les tours. Une différence de diamètres entre le revêtement interne et le cathéter se situe dans une fourchette allant d'environ 0,0005 à environ 0,004 pouce (soit de 0,013 à environ 0,10 mm).

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