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Publication Number
US-12569249-B2
Publication Date
2026-03-10
Expiration Date
Abstract
A medical stapler is a medical stapler used together with an endoscope and includes a flexible elongated member extending in a length direction of the endoscope, a wire inserted inside the elongated member and movable forward and backward with respect to the elongated member, a suture assembly connected to a distal end of the wire and being able to suture a gripped treatment target with a staple, an operation unit connected to a rear end of the wire and ejecting the staple from the suture assembly by moving the wire forward and backward, and an ejection restriction structure restricting ejection of the staple when a tension applied to the wire is equal to or less than a first tension caused by a change in shape of the elongated member.
Core Innovation
The invention relates to a medical stapler used together with an endoscope. The medical stapler includes a flexible elongated member extending in a length direction of the endoscope, an inside wire inserted inside the elongated member, and a suture assembly connected to a distal end of the wire to suture a gripped treatment target with a staple.
An operation unit connected to a rear end of the wire ejects the staple from the suture assembly by moving the wire forward and backward. The medical stapler further includes an ejection restriction structure that restricts ejection of the staple when a tension applied to the wire is equal to or less than a first tension caused by a change in shape of the elongated member.
In a disclosed arrangement, the ejection restriction structure includes a connector connecting the wire to the suture assembly and displaceable between a connection position with the suture assembly and a restriction position away from the connection position. The connector is configured to be displaced from the restriction position to the connection position when the first tension is applied to the wire.
Claims Coverage
The independent claim covers 3 inventive features in a flexible endoscope-used medical stapler having a tension-threshold-based ejection restriction structure tied to deformation of a flexible elongated member.
Flexible endoscope-compatible stapler with movable wire-driven suture assembly
A medical stapler used together with an endoscope, comprising a flexible elongated member extending in a length direction of the endoscope, a wire inserted inside the elongated member and movable forward and backward with respect to the elongated member, a suture assembly connected to a distal end of the wire and being able to suture a gripped treatment target with a staple, and an operation unit connected to a rear end of the wire and ejecting the staple from the suture assembly by moving the wire forward and backward.
Tension-threshold ejection restriction based on deformation-caused first tension
An ejection restriction structure restricting ejection of the staple when a tension applied to the wire is equal to or less than a first tension caused by a change in shape of the elongated member.
Displaceable connector shifting between restriction position and connection position upon first tension
The ejection restriction structure includes a connector connecting the wire to the suture assembly and displaceable between a connection position with the suture assembly and a restriction position away from the connection position, wherein the connector is configured to be displaced from the restriction position to the connection position when the first tension is applied to the wire.
The claim coverage centers on restricting staple ejection when wire tension is at or below a first tension associated with change in shape of the flexible elongated member, implemented with an ejection restriction structure that includes a connector displaceable between a restriction position and a connection position in response to the first tension.
Stated Advantages
Curb unintended staple falling off without reducing ease of endoscope insertion.
Documented Applications
A medical stapler used together with an endoscope to suture a gripped treatment target with a staple.
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