Preformed stylet for guiding a lead to contact the septum
First Claim
1. A guiding stylet, for introducing a septal lead to contact an atrial or ventricular septum wall, comprising:
- a flexible wire having a proximal end and a distal end suitable for passage in a central lumen of said septal lead, anda control handle fixed to the proximal end of the wire and rotatable about an axis;
said wire being elastically deformable in bending and having in an unstressed state, at its distal end, an unstressed shape comprising, successively;
a first curvilinear portion, a first straight portion, and a second curvilinear portion nearer to the distal end of the wire than the first curvilinear portion;
wherein the wire has a rigidity in torsion to allow transmission along its length of a rotational movement by a rotation of the handle, whereby the rotational movement of the wire by a rotation of the handle causes an adjustment of an opening angle of the second curvilinear portion by accumulating torque in the wire;
wherein the first curvilinear portion and the second curvilinear portion extend in respective planes that make an angle between them that define a dihedral angle that includes the first straight portion, wherein the dihedral angle is less than 45°
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wherein the total length of the first curvilinear portion, the first straight portion, and the second curvilinear portion is between 82 and 195 mm;
wherein said distal end is configured to be positioned within an anatomical curvature of a venous system extending from a right or left cephalic vein, through a superior vena cava, and towards the septum wall;
wherein the distal end comprises a positioned shape when positioned within the anatomical curvature; and
wherein the positioned shape substantially matches the unstressed shape.
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Accused Products
Abstract
Preformed guiding stylet for introducing a septal lead in contact with the septum or other intra-corporal device in contact with body tissue. This stylet includes a flexible wire to be introduced by its distal end in a central lumen of the lead, and a control handle. The wire is elastically deformable in bending and has sufficient rigidity in torsion to enable transmission by the handle rotation of a rotational movement over the entire length of the wire. Unstressed, the wire comprises successively in its distal part a first curvilinear portion a first straight portion a second curvilinear portion and optionally a second straight portion. The first and second curvilinear portions extend in respective planes making an angle between them defining a dihedral which axis comprises the first straight portion. The total length of the first curvilinear portion coincides with the anatomical curvature of the venous system.
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Citations
20 Claims
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1. A guiding stylet, for introducing a septal lead to contact an atrial or ventricular septum wall, comprising:
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a flexible wire having a proximal end and a distal end suitable for passage in a central lumen of said septal lead, and a control handle fixed to the proximal end of the wire and rotatable about an axis; said wire being elastically deformable in bending and having in an unstressed state, at its distal end, an unstressed shape comprising, successively;
a first curvilinear portion, a first straight portion, and a second curvilinear portion nearer to the distal end of the wire than the first curvilinear portion;wherein the wire has a rigidity in torsion to allow transmission along its length of a rotational movement by a rotation of the handle, whereby the rotational movement of the wire by a rotation of the handle causes an adjustment of an opening angle of the second curvilinear portion by accumulating torque in the wire; wherein the first curvilinear portion and the second curvilinear portion extend in respective planes that make an angle between them that define a dihedral angle that includes the first straight portion, wherein the dihedral angle is less than 45°
;wherein the total length of the first curvilinear portion, the first straight portion, and the second curvilinear portion is between 82 and 195 mm; wherein said distal end is configured to be positioned within an anatomical curvature of a venous system extending from a right or left cephalic vein, through a superior vena cava, and towards the septum wall; wherein the distal end comprises a positioned shape when positioned within the anatomical curvature; and wherein the positioned shape substantially matches the unstressed shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A guiding stylet, for introducing a septal lead to contact an atrial or ventricular septum wall, comprising:
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a flexible wire having a proximal end and a distal end suitable for passage in a central lumen of said septal lead, and a control handle fixed to the proximal end of the wire and rotatable about an axis; said wire being elastically deformable in bending and having in an unstressed state, at its distal end, an unstressed shape comprising, successively;
a first curvilinear portion, a first straight portion, and a second curvilinear portion nearer to the distal end of the wire than the first curvilinear portion;wherein the wire has a rigidity in torsion to allow transmission along its length of a rotational movement by a rotation of the handle, whereby the rotational movement of the wire by a rotation of the handle causes an adjustment of an opening angle of the second curvilinear portion by accumulating torque in the wire; wherein the first curvilinear portion and the second curvilinear portion extend in respective planes that make an angle between them that define a dihedral angle that includes the first straight portion, wherein the dihedral angle is between 10° and
30°
;wherein the first curvilinear portion has a radius of curvature between 40 and 60 mm and provides an opening angle of between 70° and
110°
;wherein the second curvilinear portion has a radius of curvature between 10 and 15 mm, and wherein the second curvilinear opening angle is adjustable between 20° and
40°
;wherein the total length of the first curvilinear portion, the first straight portion, and the second curvilinear portion is between 82 and 195 mm; wherein the first straight portion has a length between 30 and 70 mm; wherein said distal end is configured to be positioned within an anatomical curvature of a venous system extending from a right or left cephalic vein, through a superior vena cava, and towards the septum wall; wherein the distal end comprises a positioned shape when positioned within the anatomical curvature; and wherein the positioned shape substantially matches the unstressed shape. - View Dependent Claims (19, 20)
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Specification