| 摘要 |
<p>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.</p> |
