Infusion guidewire including proximal stiffening sheath
First Claim
Patent Images
1. A flexible elongated medical infusion guidewire having proximal and distal portions, adapted for delivering pressurized fluid medicaments to a site within a body vessel, comprising:
- a flexible elongated helically arranged coil of round wire having a proximal portion and a distal portion, and defining a central lumen therethrough having a distalmost end blocked by a ball weld thereon;
a first sheath stiffening means comprised of a single flexible layer or polyimide film in a tubular configuration disposed immediately about and co-extensive with substantially all of just said proximal portion of just said helically arranged coil;
a second sheath enclosure means disposed immediately about said first sheath means and being co-extensive therewith and with all of said distal portion of said helically arranged coil; and
a plurality of dispersion means arranged within said distal portion of said second sheath.
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Abstract
A flexible elongated medical infusion guidewire having proximal and distal portions for delivering a pressurized fluid medicaments to a site with a body vessel. The guidewire is comprised of a helically wound coil having a polyimide sheath tightly enclosing its proximal portion, and a teflon sheath tightly covering the entire wire coil. The teflon sheath is punctured at its distal end to facilitate release of fluid therethrough. The coil is closed at its distalmost end by a ball weld.
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Citations
19 Claims
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1. A flexible elongated medical infusion guidewire having proximal and distal portions, adapted for delivering pressurized fluid medicaments to a site within a body vessel, comprising:
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a flexible elongated helically arranged coil of round wire having a proximal portion and a distal portion, and defining a central lumen therethrough having a distalmost end blocked by a ball weld thereon; a first sheath stiffening means comprised of a single flexible layer or polyimide film in a tubular configuration disposed immediately about and co-extensive with substantially all of just said proximal portion of just said helically arranged coil; a second sheath enclosure means disposed immediately about said first sheath means and being co-extensive therewith and with all of said distal portion of said helically arranged coil; and a plurality of dispersion means arranged within said distal portion of said second sheath. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A flexible elongated medical infusion guidewire having proximal and distal portions adapted for delivering pressurized fluid medicaments to a site within a body vessel, comprising:
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a flexible elongated multifilar coil of helically wound round wire defining a central lumen therethrough having a closed distalmost end; a first and a second sheath closely fitted completely about a proximal portion of said multifilar coil; said second sheath closely fitted about and extending completely over the balance of said coil comprising a distal weeping portion of said multifilar coil; and an indicator band arranged at the distal end of said first sheath and under said second sheath, to provide marker means as to the location of said guidewire in a body vessel. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification