A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 5/028 (2006.01) A61M 25/00 (2006.01)
Patent
CA 2215147
A heater (12) for a catheter (10) used in monitoring constant cardiac output is fabricated using a bifilar wire (21) coated with polyvinyl chloride (PVC) like that used for the catheter. The bifilar wire is coated with the PVC using a conventional extrusion technique, producing a coated lead (24, 32). The coated lead is wrapped around the exterior surface of the catheter, forming a helical coil. Heat is applied to the coated lead to melt the PVC coating, causing it to bond the lead to the catheter. The melted PVC also flows into gaps (23) or notches between adjacent coils of the lead, producing a relatively smooth outer surface for the heater when cooled.
La fabrication d'un élément chauffant (12) intégré à un cathéter (10) servant à mesurer le débit cardiaque utilise un câble électrique bifilaire (21) revêtu de PVC comme le cathéter. Ledit câble est revêtu de PVC à l'aide d'une technique de gainage classique par extrusion (24, 32). Le câble une fois gainé est enroulé en hélice autour du cathéter puis on le chauffe pour en faire fondre la gaine de PVC de manière à le faire adhérer au cathéter. Le PVC fondu se répand également dans les interstices (23) et fentes séparant les spires contiguës du câble ce qui donne à l'élément chauffant après refroidissement une surface relativement lisse.
Abbott Laboratories
Hospira Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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