Device for catheter sheath retraction
First Claim
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1. A device for moving a sheath retraction line relative to a catheter through which it at least partially extends, the device comprising:
- a housing connectable to the catheter;
a mover associated with the housing and connectable to the sheath retraction line for moving the sheath retraction line relative to the housing and relative to the connected catheter;
a pre-mover for effecting a pre-movement adjustment of the sheath retraction line connected to the mover relative to the catheter connected to the housing, to reduce slack between the sheath retraction line and the catheter in preparation for moving the sheath retraction line with the mover, to ensure direct subsequent relative movement between the sheath retraction line and the catheter by the mover, the pre-mover being configured to become inoperable following pre-movement adjustment of the sheath retraction line, wherein the housing forms a sealed unit in which the mover and pre-mover are mounted to be actuated by a user; and
a limiter for limiting the extent of movement of the sheath retraction line relative to the catheter, wherein the limiter comprises a band of substantially inextensible material which is connected at one end to, and is wound on, a spool which is mounted to the housing, the band being connected at the other end to a winding member of the mover onto which the band is wound from the spool as the mover moves the sheath retraction line, thereby permitting movement of the mover until the band is fully unwound from the spool and thereafter preventing further movement of the sheath retraction line by the mover.
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Abstract
A device for moving an elongate member relative to an elongate body through which it extends, the device including a housing, a mover, and a pre-mover. The housing is connectable to the elongate body. The mover is associated with the housing and is connectable to the elongate member for moving the elongate member relative to the housing. The pre-mover is associated with the housing and is connectable to the elongate member for adjusting the elongate member in preparation for moving the elongate member with the mover.
457 Citations
18 Claims
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1. A device for moving a sheath retraction line relative to a catheter through which it at least partially extends, the device comprising:
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a housing connectable to the catheter; a mover associated with the housing and connectable to the sheath retraction line for moving the sheath retraction line relative to the housing and relative to the connected catheter; a pre-mover for effecting a pre-movement adjustment of the sheath retraction line connected to the mover relative to the catheter connected to the housing, to reduce slack between the sheath retraction line and the catheter in preparation for moving the sheath retraction line with the mover, to ensure direct subsequent relative movement between the sheath retraction line and the catheter by the mover, the pre-mover being configured to become inoperable following pre-movement adjustment of the sheath retraction line, wherein the housing forms a sealed unit in which the mover and pre-mover are mounted to be actuated by a user; and a limiter for limiting the extent of movement of the sheath retraction line relative to the catheter, wherein the limiter comprises a band of substantially inextensible material which is connected at one end to, and is wound on, a spool which is mounted to the housing, the band being connected at the other end to a winding member of the mover onto which the band is wound from the spool as the mover moves the sheath retraction line, thereby permitting movement of the mover until the band is fully unwound from the spool and thereafter preventing further movement of the sheath retraction line by the mover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A device for moving a sheath retraction line relative to a catheter through which it at least partially extends, the device comprising:
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a housing connectable to the catheter; a mover associated with the housing and connectable to the sheath retraction line for moving the sheath retraction line relative to the housing and relative to the connected catheter; and a pre-mover for effecting a pre-movement adjustment of the sheath retraction line connected to the mover relative to the catheter connected to the housing, to reduce slack between the sheath retraction line and the catheter in preparation for moving the sheath retraction line with the mover, to ensure direct subsequent relative movement between the sheath retraction line and the catheter by the mover, the pre-mover being configured to become inoperable following pre-movement adjustment of the sheath retraction line, wherein the housing forms a sealed unit in which the mover and pre-mover are mounted to be actuated by a user, wherein the pre-mover includes a rack gear configured to engage initially with a pinion gear of the mover, so that adjustment of the sheath retraction line relative to the catheter is effected by actuation of the rack gear to rotate the pinion gear of the mover. - View Dependent Claims (15)
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16. A device for moving an elongate member by a predetermined distance relative to an elongate body through which it at least partially extends, thereby to release a stent at the distal end of the elongate body, the device comprising:
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a take-up reel onto which the elongate member is wound when it is moved; and a limiter that is configured to limit further rotation of the take-up reel after a length of the elongate member has been taken up on the reel to move the elongate member said pre-determined distance, wherein; the limiter comprises a tethered line, which is configured to be progressively consumed when the take-up reel is rotated until the tethered line anchors the take-up reel against further rotation, the tethered line to be consumed has a consumable length corresponding to the length of said elongate member to be taken up, and either; (i) a plurality of tether lines are provided having different respective consumable lengths, from which the tethered line to be consumed is selected having a consumable length which corresponds to the length of said elongate member to be taken up, or (ii) a tether line is provided having reference markings along its length indicating different consumable lengths corresponding to different lengths of said elongate member which can be taken up, the consumable length being set by the tether line being consumed, prior to moving the elongate member, up to the reference marking which indicates a remaining consumable length corresponding to the length of said elongate member to be taken up. - View Dependent Claims (17, 18)
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Specification