US 5,449,372 A · Temporary stent and methods for use and manufacture

Abstract

A temporary stent for supporting a region of a vessel in a body comprising a composite stent portion and an actuator portion and methods for the use and manufacture thereof. The composite stent portion is comprised of an elongate perfusable vessel supporting portion adapted to be configurable between a reduced size for placement in the vessel and removal therefrom and an expanded size for structurally supporting the vessel and perfusable end portions connected to and forming ends of the vessel supporting portion and adapted to allow fluid flow therethrough. The composite stent portion is comprised of a plurality of resilient metallic wires coated with a polymeric material to provide stability for both lifting and maintaining a vessel. A method is disclosed for deployment of the composite stent to maintain vessel patency during occurrence of an intimal flap, vasoconstriction or vasospasm.

Claims35

Dependent claims

A removable stent for temporarily supporting a region of a vessel in a body comprising:

a composite stent portion comprised of:
an elongate perfusable vessel supporting portion adapted to be configurable between a reduced size for placement in the vessel and removal therefrom and an expanded size for structurally supporting the vessel in the region;
and
perfusable end portions connected to and forming ends of said vessel supporting portion and adapted to allow fluid flow therethrough, and further in which said composite stent portion is comprised of:
a plurality of wires forming an elongate hollow tubular braid, and
a coating applied to said tubular braid to limit relative translation of one of said plurality of wires with respect to another of said plurality of wires at a location in said braid at which the one of said plurality of wires crosses the other of said plurality of wires;
and
an actuator portion having a proximal end extending out of the body and a distal end connected to said stent portion and operable by manipulation at said proximal end to configure said support portion into said reduced size and said expanded size.

5 more elements

A removable stent for temporarily supporting a region of a vessel in a body comprising:

a stent portion comprised of:
an elongate perfusable vessel supporting portion adapted to be configurable between a reduced size for placement in the vessel and removal therefrom and an expanded size for structurally supporting the vessel in the region;
and
perfusable end portions connected to and forming ends of said vessel supporting portion and adapted to allow fluid flow therethrough;
and
an actuator portion having a proximal end extending out of the body and a distal end connected to said stent portion and operable by manipulation at said proximal end to configure said support portion into said reduced size and said expanded size, said actuator portion comprising:
a first elongate member comprising an elongate catheter tube connected to said proximal end of said stent portion, and
a second elongate member slidably disposed in a lumen of said first elongate member and extending to and operable to move said distal end of said stent portion with respect to said proximal end of said stent portion;
a first marker connected at approximately the distal end of said stent portion;
a second marker connected at approximately the proximal end of said stent portion, whereby the length of said stent portion can be determined by observation of said first and said second markers.

7 more elements

A method of stabilizing a patient's vessel during an occurrence or during a time when there is the potential for an occurrence of a restriction to blood flow through the vessel from a vasoconstriction, vasospasm, or similar condition at a location in the vessel, comprising the steps of:

positioning a temporary stent into the patient's vessel with a vessel supporting portion of the temporary stent in the vessel at the location and an actuator portion of the temporary stent having a distal portion connected to the vessel supporting portion and a proximal portion extending out of the patient's vessel;
manipulating the vessel supporting portion from the proximal portion of the actuator portion to cause the vessel supporting portion to change from a reduced size suitable for positioning of the temporary stent in the patient's vessel to an expanded size suitable for supporting the patient's vessel during an occurrence or during a time when there is the potential for an occurrence of a restriction to blood flow through the vessel from a vasoconstriction, vasospasm, or similar condition;
maintaining said vessel supporting portion in said expanded size while permitting blood perfusion through distal and proximal ends of the vessel supporting portion;
manipulating the vessel supporting portion from the proximal portion of the actuator portion to cause the vessel supporting portion to change from said expanded size to said a reduced size;
withdrawing the temporary stent after the condition or potential of a condition of a vasoconstriction, vasospasm, or similar condition has passed.

2 more elements

Dependencies are inferred from the claim text.

Temporary stent and methods for use and manufacture

Life of this patent

Temporary stent and methods for use and manufacture

Life of this patent

Abstract

Claims35