초록 ▼

A catheter guide wire designed for use in guiding a catheter to a target site along a tortuous vessel path. The guide wire has a relatively long, torqueable proximal wire section, a more flexible intermediate section, and a most flexible distal end section designed to be advanced across sharp-bend v

A catheter guide wire designed for use in guiding a catheter to a target site along a tortuous vessel path. The guide wire has a relatively long, torqueable proximal wire section, a more flexible intermediate section, and a most flexible distal end section designed to be advanced across sharp-bend vessel junctions. The intermediate section has greater lubricity than the adjacent proximal and distal sections. The greater frictional coefficient in the distal end segment acts to anchor the end of the wire in a branch vessel, when the guide wire has been advanced across the sharp-bend vessel junction, and the catheter is threaded axially over the wire, while the more lubricious surface of the intermediate section gives reduced sliding friction within the catheter during such advance. The invention also includes a catheter device containing the guide wire and catheter.

대표청구항 ▼

A catheter guide wire designed for use in guiding a catheter to a target site along a tortuous vessel path which is at least about 20 cm long and which has sharp-bend vessel junctions, requiring advancing a distal portion of the wire across the junction, then sliding the catheter over the advanced p

A catheter guide wire designed for use in guiding a catheter to a target site along a tortuous vessel path which is at least about 20 cm long and which has sharp-bend vessel junctions, requiring advancing a distal portion of the wire across the junction, then sliding the catheter over the advanced portion of the wire, said guide wire comprising a flexible, torqueable proximal wire section between about 50-250 cm in length and formed of a proximal wire core segment having an outer diameter of between about 10-40 mils, a more flexible intermediate section having a length between about 20-60 cm and formed from an intermediate wire-core segment having a reduced diameter of between about 4-20 mils and between about 10%-50% of the core\s proximal segment, and a flexible polymer tube covering which encases the intermediate core segment and which provides column strength thereto, and a most flexible distal end section have a length between about 1-10 cm and formed from a distal wire core segment having a reduced diameter of between about 2-6 mils, and a flexible sleeve covering the distal end segment and providing column strength thereto, said intermediate section having a polymer surface which makes the section more lubriciuos than the adjacent distal end segment and said wire core.