Stent delivery system, endoscope system, and stent indwelling method
Inventors
KASAMA, Mitsuru • SAKURADA, Yoichi
Assignees
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Publication Number
US-12589015-B2
Publication Date
2026-03-31
Expiration Date
Abstract
The stent delivery system includes: an outer tube in which a first opening is formed in a distal end and a second opening is formed between the distal end and a proximal end; an inner tube inserted into the outer tube from the first opening to the second opening, and disposed outside of the outer tube from the second opening to the proximal end of the outer tube; and a stent stored between the inner tube and the outer tube. The outer tube and the inner tube are configured to be inserted into a channel of an endoscope. The second opening is formed at a position where the second opening is arranged inside the channel when a storage position is protruded from a distal end side of the channel.
Core Innovation
The invention relates to a stent delivery system and an endoscope system in which an outer tube and an inner tube cooperate to store and deliver a stent. The outer tube has a first opening formed in a distal end and a second opening formed between the distal end and a proximal end, and the inner tube is inserted into the outer tube from the first opening to the second opening and disposed outside the outer tube from the second opening to the proximal end, with the stent stored in a storage position between the inner tube and the outer tube.
The outer tube and the inner tube are configured to be inserted into a channel of an endoscope. The second opening is formed at a position such that the second opening is arranged inside the channel when the storage position is protruded from a distal end side of the channel.
The invention further provides a stent indwelling method using the endoscope and the stent delivery device. The method includes inserting the stent delivery system into a channel of the endoscope, inserting the distal end of the stent delivery system through the channel to an indwelling position of a stent, fixing an inner tube of the stent delivery system to the endoscope, and exposing the stent housed between the inner tube and an outer tube by pulling the outer tube toward a proximal side.
Claims Coverage
The partial content provides three independent claims, each sharing the same core structural positioning concept while covering the stent delivery system, the combination with an endoscope, and a stent indwelling method. Across the independent claims, the inventive features are centered on the outer tube and inner tube arrangement, the placement of first and second openings, and the requirement that the second opening be arranged inside the endoscope channel when the storage position is protruded.
Outer tube and inner tube arrangement with stent stored between tubes
An outer tube in which a first opening is formed in a distal end and a second opening is formed between the distal end and a proximal end; an inner tube inserted into the outer tube from the first opening to the second opening, and disposed outside of the outer tube from the second opening to the proximal end of the outer tube; and a stent stored in a storage position between the inner tube and the outer tube.
Endoscope-channel positioning of the second opening when storage position is protruded
The outer tube and the inner tube are configured to be inserted into a channel of an endoscope, wherein the second opening is formed at a position where the second opening is arranged inside the channel when the storage position is protruded from a distal end side of the channel.
Endoscope system including a stent delivery system insertable into an endoscope channel
An endoscope having a channel into which the stent delivery system is insertable, the stent delivery system including an outer tube in which a first opening is formed in a distal end and a second opening is formed between the distal end and a proximal end; an inner tube inserted into the outer tube from the first opening to the second opening, and disposed outside of the outer tube from the second opening to the proximal end of the outer tube, and including a stent stored between the inner tube and the outer tube.
Stent indwelling method with fixing inner tube and exposing stent by pulling outer tube proximally
A stent indwelling method using an endoscope and a stent delivery device, the method comprising inserting the stent delivery system into a channel of the endoscope; inserting a distal end of the stent delivery system through the channel to an indwelling position of a stent; fixing an inner tube of the stent delivery system to the endoscope after arriving the distal end of the stent delivery system at the indwelling position; exposing the stent housed between the inner tube and an outer tube of the stent delivery system from the outer tube by pulling the outer tube toward a proximal side.
Across the independent claims, the main inventive coverage is the combination of an outer tube with first and second openings and an inner tube configured to pass through the first and second openings while carrying a stent in a storage position between the tubes, together with the positional relationship that places the second opening inside the endoscope channel when the storage position is protruded, and the stent indwelling method that fixes the inner tube to the endoscope and exposes the stent by pulling the outer tube toward the proximal side.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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