High pressure perfusion device
First Claim
Patent Images
1. A perfusion guidewire for the delivery of liquid, comprising:
- a tubular housing defining a fluid lumen therethrough, the housing having a proximal end and a distal end, wherein the distal end of the housing is formed in the shape of an elongated tapered lip;
a core wire having a proximal end and a distal end, the proximal end of the core wire being secured to the tapered lip of the tubular housing;
a first coil mounted at the distal end of the core wire; and
an elongated cylindrical sheath extending from an area proximal to the tapered lip and over a portion of the core wire, the sheath defining a continuation of the fluid lumen and having at least one fluid exit.
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Abstract
The present invention includes a guidewire device capable of delivering perfusion fluids to a vascular site while at the same time exhibiting handling characteristics associated with existing non-perfusion guidewires. Preferred embodiments include a perfusion guidewire which closely matches the dimensions and physical characteristics of standard guidewires. Preferred embodiments also permit high pressure perfusion of supersaturated solutions, and include a liquid flow path which will not promote bubble generation or growth, or destabilize a supersaturated solution.
135 Citations
32 Claims
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1. A perfusion guidewire for the delivery of liquid, comprising:
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a tubular housing defining a fluid lumen therethrough, the housing having a proximal end and a distal end, wherein the distal end of the housing is formed in the shape of an elongated tapered lip; a core wire having a proximal end and a distal end, the proximal end of the core wire being secured to the tapered lip of the tubular housing; a first coil mounted at the distal end of the core wire; and an elongated cylindrical sheath extending from an area proximal to the tapered lip and over a portion of the core wire, the sheath defining a continuation of the fluid lumen and having at least one fluid exit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A perfusion guidewire suitable for the delivery of oxygen supersaturated liquid, comprising:
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a high pressure tubular housing defining a lumen therein, the high pressure tubular housing having a proximal end and a distal end; a tubular segment mounted within the distal end of the high pressure tubular housing, the tubular segment having a proximal end and a distal end; the distal end of the tubular segment formed in the shape of an elongated tapered lip; a core wire having a proximal end and a distal end; the proximal end of the core wire being tapered and bonded to the tapered lip; a first coil mounted on the distal end of the core wire; an elongated cylindrical sheath extending from at least an area proximal to the tapered lip, and extending over a substantial portion of the core wire; the elongated cylindrical sheath having at least one fluid exit; and a second, elongated coil mounted over the elongated cylindrical sheath. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A perfusion guidewire suitable for replacement of standard guidewires and for the delivery of fluid to a treatment site, comprising:
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a tubular housing defining a fluid lumen therethrough, the housing having a proximal end and a distal end; a core wire disposed at the distal end of the tubular housing and having a proximal end and a distal end; wherein the distal end of the tubular housing and the proximal end of the core wire comprise a transition zone that provides a smooth transition in flexibility and uniform transmission of torque as between the tubular housing and core wire such that the guidewire exhibits handling characteristics substantially the same as standard guidewires; a first coil mounted at the distal end of the core wire; and an elongated cylindrical sheath extending from the tubular housing and over a portion of the core wire, the sheath defining a continuation of the fluid lumen and having at least one fluid exit. - View Dependent Claims (24, 25, 26)
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27. A perfusion guidewire, comprising:
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a flexible, torque transmitting, high pressure tubing defining a fluid lumen therethrough, the tubing having a proximal end and a distal end; a core wire having a proximal end and a distal end, the proximal end of the core wire being disposed at the distal end of the tubing; a first coil mounted at the distal end of the core wire; an elongated cylindrical sheath extending from the tubular housing over a portion of the core wire, the sheath defining a continuation of the fluid lumen; and a baffle zone extending along at least a portion of the core wire, the baffle zone defining at least one fluid exit and including perforated tubing surrounded by a permeable membrane, the permeable membrane surrounded by a second, elongated coil, wherein the baffle zone creates a flow velocity drop such that fluid perfused through said guidewire leaves said fluid exit under atraumatic conditions. - View Dependent Claims (28, 29, 30)
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31. A perfusion guidewire, comprising:
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a flexible, torque transmitting, high pressure tubing defining a fluid lumen therethrough, the tubing having a proximal end and a distal end; a core wire having a proximal end and a distal end; a transition zone that joins the distal end of the high pressure tubing to the proximal end of the core wire to provide a smooth transition in flexibility and uniform transmission of torque as between said tubing and core wire, the transition zone including means for joining the high pressure tubing and core wire such that the tubing is provided with a gradually increasing flexibility in the direction of the distal end; a first coil mounted at the distal end of the core wire; an elongated cylindrical sheath extending from the tubular housing over a portion of the core wire, the sheath defining a continuation of the fluid lumen; and a baffle zone extending along at least a portion of the core wire, the baffle zone defining at least one fluid exit and comprising means for creating a flow velocity drop such that fluid perfused through said guidewire leaves said fluid exit under atraumatic conditions. - View Dependent Claims (32)
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Specification