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US 8,308,659 B2Granted
Bi-directional sheath deflection mechanism
AssigneeGreatbatch Ltd.
InventorsGrant A. Scheibe, Mark Nelson
Life of this patent
Estimating the term…
Abstract
A deflectable sheath for use in medical procedures in the vasculature is described. The sheath includes a handle supporting the sheath. Two pull wires run along opposite sides of the sheath to anchors at the deflectable distal end. The handle includes a rotatable member that moves a threaded member including wire guide in a back and forth translation. As the movement occurs, force is applied to either one or the other of the pull wires to cause deflection of distal end of the sheath in either and upwardly or a downwardly direction with respect to the longitudinal axis of the sheath.
Claims32
A deflectable sheath, which comprises:
- a) a tubular sheath providing a delivery lumen extending from a proximal sheath portion to a deflectable distal sheath end;
- b) a handle supporting the proximal sheath portion;
- c) a support shaft extending along a first longitudinal axis of a shaft bore from a distal shaft end to an open proximal shaft end, wherein the proximal sheath portion is received in the shaft bore with the delivery lumen of the sheath being in open communication to the proximal end of the handle;
- d) a threaded member housed inside the handle and longitudinally movable back and forth in a translational relationship along the support shaft, wherein the threaded member carries a wire guide retainer;
- e) a rotatable member supported on the support shaft in a rotatable, but non-translational relationship therewith and at a position distal to the wire guide retainer, wherein the rotatable member is threadingly engaged with the threaded member to effect selected translational movement of the threaded member carrying the wire guide retainer along the support shaft;
- f) wherein a first pull wire secured to the deflectable distal sheath end extends along the sheath and the support shaft before deviating at an acute angle past the wire guide retainer to a proximal change-of-direction device and then back at the acute angle to and then through the wire guide retainer to a proximal first pull wire end provided with a first stop member located distally of the wire guide retainer;
- g) wherein a second pull wire secured to the deflectable distal sheath end extends along the sheath and the support shaft to and through the wire guide retainer to a proximal second pull wire end provided with a second stop member located proximally of the wire guide retainer;
- h) wherein the rotatable member is manipulatable in a first direction to translate the threaded member carrying the wire guide retainer along the support shaft in a forwardly direction against the first stop member to apply a first pulling force on the first pull wire to thereby deflect the distal sheath end into a first orientation out of alignment with respect to a second longitudinal axis of the sheath;
- and
- i) wherein the rotatable member is manipulatable in a second direction, opposite the first direction, to translate the threaded member carrying the wire guide retainer along the support shaft in a rearwardly direction against the second stop member to apply a second pulling force on the second pull wire to thereby deflect the distal sheath end into a second orientation, out of alignment with respect to the second longitudinal axis of the sheath.
7 more elements
A deflectable sheath, which comprises:
- a) a tubular sheath providing a delivery lumen, extending from a proximal sheath portion to a deflectable distal sheath end;
- b) a handle supporting the proximal sheath portion;
- c) a support shaft extending along a first longitudinal axis of a shaft bore from a distal shaft end to an open proximal shaft end, wherein the support shaft provides spaced apart first and second grooves extending parallel to the first longitudinal axis of the shaft bore and wherein the proximal sheath portion is received in the shaft bore with the delivery lumen of the sheath being in open communication to the proximal end of the handle;
- d) a threaded member housed, inside the handle and longitudinally movable back and forth in a translational relationship along the support shaft, wherein the threaded member includes a carriage carrying a wire guide retainer;
- e) a rotatable member supported on the support shaft in a rotatable, but non-translational relationship therewith and at a position distal to the wire guide retainer carried by the carriage, wherein the rotatable member is threadingly engaged with the threaded member to effect selected translational movement of the threaded member and the carriage carrying the wire guide retainer along the support shaft;
- f) wherein a first pull wire secured to the deflectable distal sheath end extends along the sheath and the first groove of the support shaft before deviating at an acute angle past the wire guide retainer to a proximal pulley and then back at the acute angle to and then through a first bore in the wire guide retainer to a proximal first pull wire end provided with a first stop member located distally of the wire guide retainer;
- g) wherein a second pull wire secured to the deflectable distal sheath end extends along the sheath and the second groove in the support shaft to and through a second bore in the wire guide retainer to a proximal second pull wire end provided with a second stop member located proximally of the wire guide retainer;
- h) wherein the rotatable member is manipulatable in first direction to translate the threaded member and the carriage carrying the wire guide retainer along the support shaft in a forwardly direction against the first stop member to apply a first pulling force on the first pull wire to thereby deflect the distal sheath end into a first orientation out of alignment with respect to a second longitudinal axis of the sheath;
- and
- i) wherein the rotatable member is manipulatable in a second direction, opposite the first direction, to translate the threaded member carrying the wire guide retainer along the support shaft in a rearwardly direction against the second stop member to apply a second pulling force on the second pull wire to thereby deflect the distal sheath end into a second orientation out of alignment with respect to the second longitudinal axis of the sheath.
7 more elements
A deflectable sheath, which comprises:
- a) a tubular sheath providing a delivery lumen extending from a proximal sheath portion to a deflectable distal sheath end;
- b) a handle supporting the proximal sheath portion;
- c) a support shaft extending along a first longitudinal axis of a shaft bore from a distal shaft end to an open proximal shaft end, wherein the support shaft provides opposed first and second grooves extending parallel to the first longitudinal axis of the shaft bore and wherein the proximal sheath portion is received in the shaft bore with the delivery lumen of the sheath being in open communication to the proximal end of the handle;
- d) a threaded member housed inside the handle and longitudinally movable back and forth in a translational relationship along the support shaft, wherein the threaded member includes a wire guide retainer;
- e) a rotatable member supported on the support shaft in a rotatable, but non-translational relationship therewith and at a position distal to the wire guide retainer, wherein the rotatable member is threadingly engaged with the threaded member to effect selected translational movement of the threaded member carrying the wire guide retainer along the support shaft;
- f) wherein a first pull wire secured to the deflectable distal sheath end extends along the sheath and the first groove of the support shaft in a co-axial relationship with the shaft bore before deviating at an acute angle past the wire guide retainer to a proximal pulley and then back at the acute angle to and then through a first bore in the wire guide retainer to a proximal first pull wire end provided with a first stop member located distally of the wire guide retainer;
- g) wherein a second pull wire secured to the deflectable distal sheath end extends along the sheath and the second groove in the support shaft in a co-axial relationship with the shaft bore to and through a second bore in the wire guide retainer to a proximal second pull wire end provided with a second stop member located proximally of the wire guide retainer;
- h) wherein the rotatable member is manipulatable in a first direction to translate the threaded member and the carriage carrying the wire guide retainer along the support shaft in a forwardly direction against the first stop member to apply a first pulling force on the first pull wire to thereby deflect the distal sheath end into a first orientation out of alignment with respect to a second longitudinal axis of the sheath;
- and
- i) wherein the rotatable member is manipulatable in a second direction, opposite the first direction, to translate the threaded member carrying the wire guide retainer along the support shaft in a rearwardly direction against the second stop member to apply a second pulling force on the second pull wire to thereby deflect the distal sheath end into a second orientation out of alignment with respect to the second longitudinal axis of the sheath.
7 more elements
Dependencies are inferred from the claim text.