Delivery device and method for indwelling stent
AssigneeOlympus Medical Systems Corp.
InventorYoichi SAKURADA
Life of this patent
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Abstract
A delivery device includes a handle, a first sheath having a proximal end portion connected to the handle, a second sheath through which the first sheath is inserted, the second sheath translatable relative to the handle in a longitudinal direction of the delivery device, a third sheath through which the second sheath is inserted and a length adjustment mechanism. A distance in the longitudinal direction of the delivery device between a proximal end of the first sheath and a distal end of the third sheath defines a separation distance. The length adjustment mechanism adjusts the separation distance between a first length and a second length. The second length is longer than the first length.
Claims20
A delivery device, comprising:
- a handle;
- a first sheath having a proximal end portion connected to the handle;
- a second sheath through which the first sheath is inserted, the second sheath translatable relative to the handle in a longitudinal direction of the delivery device;
- a third sheath through which the second sheath is inserted;
- and
- a length adjustment mechanism,
- wherein a distance in the longitudinal direction of the delivery device between a proximal end of the first sheath and a distal end of the third sheath defines a separation distance,
- wherein the length adjustment mechanism adjusts the separation distance between a first length and a second length, and
- wherein the second length is longer than the first length.
A delivery device, comprising:
- a first sheath;
- a second sheath through which the first sheath is inserted, the second sheath translatable relative to the handle in a longitudinal direction of the delivery device;
- a third sheath having a channel extending therein, wherein the second sheath is inserted through the channel and the second sheath is translatable in the channel relative to the third sheath in the longitudinal direction of the delivery device;
- and
- a length adjustment mechanism,
- wherein the length adjustment mechanism adjusts a length of the second sheath inserted through the channel between a first length and a second length, and
- wherein the second length is longer than the first length.
A method for indwelling a stent, comprising steps of:
- inserting a sheath main body of a delivery device into a channel of an endoscope, wherein the sheath main body of the delivery device includes a first sheath, a second sheath through which the first sheath is inserted, the second sheath translatable relative to the handle in a longitudinal direction of the delivery device, and a third sheath having a sheath channel extending therein, wherein the second sheath is inserted through the sheath channel and the second sheath is translatable in the sheath channel relative to the third sheath in the longitudinal direction of the delivery device;
- fixing a position of the sheath main body in the longitudinal direction of the delivery device relative to the channel of the endoscope;
- retracting the second sheath to cause a part of a stent accommodated in a distal end portion of the sheath main body to protrude from the delivery device;
- and
- changing a length of the second sheath inserted through the sheath channel between a first length and a second length by advancing the second sheath relative to the third sheath, where the second length is longer than the first length,
- wherein advancing the second sheath causes the stent to be accommodated inside the sheath main body.
Dependencies are inferred from the claim text.