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Publication Number
US-12594073-B2
Publication Date
2026-04-07
Expiration Date
Abstract
A medical stapler includes a stapling head including a staple ejection portion, an anvil openably and closably coupled to the stapling head by a rotation shaft, a staple receiving portion provided in the anvil and provided at a position facing the staple ejection portion when the stapling head and the anvil are in a closed state, a lever rotatably provided on the stapling head, and a lever operation wire connected to the lever and provided to extend in a direction of a proximal end of the stapling head, in which the lever is capable of raising upward with respect to the stapling head in accordance with advance and retraction of the lever operation wire.
Core Innovation
The medical stapler includes a stapling head having a staple ejection portion and an anvil openably and closably coupled to the stapling head by a rotation shaft. A staple receiving portion is provided in the anvil at a position facing the staple ejection portion when the stapling head and the anvil are in a closed state. A lever is rotatably provided on the stapling head, and a lever operation wire is connected to the lever and extends in a direction of a proximal end of the stapling head.
During advance and retraction of the lever operation wire, the lever is capable of raising upward with respect to the stapling head. The lever is configured to pass through the anvil when the stapling head and the anvil are in the closed state. This structure supports observing a treatment target in a field of view showing an endoscope while raising the lever relative to the stapling head and before staple ejection.
In embodiments, the lever and/or anvil define visual spaces for a grasped treatment tool, including configurations where a grasped treatment tool passes through a first visual space in the anvil and a second visual space defined by the lever. The stapling head further provides a temporarily immobilizing portion that temporarily immobilizes a treatment target with respect to the stapling head, including a temporarily immobilizing portion provided with a needle-like or conical protrusion, and a suction-based temporarily immobilizing portion having a suction port and a suction sheath.
Claims Coverage
The partial content includes three independent claims: a medical stapler architecture with a lever operation wire and a passing/raising lever, a medical stapler including a lever passing through the anvil together with a temporarily immobilizing portion, and suturing methods that combine endoscope insertion/observation with anvil open-close, lever raising, and staple ejection. Across these independent claims, the inventive features cluster into the anvil and staple receiving/ejection arrangement, the lever that passes through the anvil in a closed state while raising upward, and immobilization and endoscopic observation tied to the suturing steps before staple ejection.
Lever raising with a passing lever through a closed anvil
A medical stapler comprising a lever rotatably provided on the stapling head and a lever operation wire connected to the lever, wherein the lever is capable of raising upward with respect to the stapling head in accordance with advance and retraction of the lever operation wire, and wherein the lever is configured to pass through the anvil when the stapling head and the anvil are in the closed state.
Openably and closably coupled anvil with facing staple receiving and staple ejection portions
A medical stapler comprising an anvil openably and closably coupled to the stapling head by a rotation shaft and a staple receiving portion provided in the anvil at a position facing the staple ejection portion when the stapling head and the anvil are in a closed state.
Temporarily immobilizing portion for temporarily immobilizing a treatment target
A medical stapler comprising a lever configured to pass through the anvil when the stapling head and the anvil are in the closed state, and a temporarily immobilizing portion provided in the stapling head, the temporarily immobilizing portion being capable of temporarily immobilizing a treatment target with respect to the stapling head.
Endoscope-based suturing with sequential anvil open-close, lever raising, observation, and staple ejection
A suturing method comprising insertion of a medical stapler and an endoscope into a body; advancing a treatment tool protruded from the endoscope with respect to the medical stapler; bringing an anvil into an open state with respect to a stapling head at a portion close to a treatment target; grasping a tissue containing the treatment target; retracting the treatment tool relative to the medical stapler to draw in the treatment target to a proximal-end side of the medical stapler with respect to a staple ejection position; bringing the anvil into a closed state with respect to the stapling head to fix the tissue; raising a lever upward with respect to the stapling head, wherein the lever is configured to pass through the anvil when the anvil and the stapling head are in the closed state; projecting the treatment target within a field of view showing the endoscope; and ejecting a staple from the stapling head to suture a circumference of the treatment target.
Pressing the treatment target toward the endoscope side by lowering the lever after anvil closure
A suturing method comprising insertion of a medical stapler and an endoscope into a body; advancing a treatment tool protruded from the endoscope with respect to the medical stapler; bringing an anvil into an open state with respect to a stapling head at a portion close to a treatment target; raising a lever upward with respect to the stapling head; grasping a tissue containing the treatment target; retracting the treatment tool relative to the medical stapler to draw in the treatment target to a proximal-end side of the medical stapler with respect to a staple ejection position; bringing the anvil into a closed state with respect to the stapling head; pressing the treatment target drawn in to an endoscope side from above by lowering the lever; projecting the treatment target within a field of view showing the endoscope; and ejecting a staple from the stapling head to suture a circumference of the treatment target.
Across the independent claims, the disclosed suturing system centers on an openably and closably coupled anvil with staple receiving and staple ejection portions, combined with a lever that passes through the anvil when closed and raises upward relative to the stapling head. The method claims further require endoscope-based insertion and observation, sequential anvil open-close to fix tissue, lever raising for projecting and observing the treatment target, and then ejecting staples to suture a circumference. In the alternative method, after anvil closure a pressing step presses the treatment target toward the endoscope side by lowering the lever.
Stated Advantages
Endoscopic observation of the treatment target in a field of view showing the endoscope is performed during the suturing sequence before ejecting a staple.
The anvil is brought into a closed state to fix the tissue before the observation step and staple ejection.
A temporarily immobilizing portion can temporarily immobilize the treatment target with respect to the stapling head.
A pressing step can press the treatment target drawn in to an endoscope side from above by lowering the lever.
Documented Applications
Suturing a circumference of a treatment target inside a body using a medical stapler and an endoscope with endoscope field-of-view observation prior to staple ejection.
Medical stapler usage configuration enabling endoscope-based visualization involving lever raising and passing through the anvil during closed-state observation and suturing.
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