Medical device for causing hemostasis of blood vessel

Patent metadata

Field	Value
Publication number	US-12594080-B2
Application number	US-202218714380-A
Country	US
Kind code	B2
Filing date	Feb 25, 2022
Priority date	Feb 25, 2022
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

A medical device for causing the hemostasis of a blood vessel for use through an endoscope comprises: a handle; a sheath device, which is attached to the handle; a clamp device including a clamp housing provided on the distal end of the sheath device and at least two, in particular exactly two clamp arms; a control wire extending through the sheath device and reversibly movable in the distal and proximal direction; an actuator coupled to the proximal end of the control wire and actuable to reversibly move the control wire in the distal and proximal direction; wherein the clamp arms are each coupled to the distal end of the control wire.

First claim

The invention claimed is:

1 . A medical device for causing hemostasis of blood vessel comprising:
a handle; a sheath device, which is attached to the handle; a clamp device comprising a clamp housing provided on the distal end of the sheath device and at least two clamp arms; a control wire extending through the sheath device and reversibly moveable in the distal and proximal direction; an actuator coupled to the proximal end of the control wire and actuable to reversibly move the control wire in the distal and proximal direction; wherein the clamp arms are each coupled to the distal end of the control wire and wherein the clamp device is actuable to open and close the clamp arms by a movement of the control wire such that a movement of the control wire in a proximal direction is translated into a closing movement of the clamp arms and a movement of the control wire in the distal direction is translated into an opening movement of the clamp arms; wherein the sheath device comprises a sheath and a connect tube, which defines a longitudinal axis and is fixedly connected to the distal end of the sheath; where the clamp housing is directly and releasably connected to the connect tube in such a way that the clamp housing can be rotated relative to the connect tube about the longitudinal axis, wherein the clamp housing and the connect tube are connected to each other by a push-in connection that forms an overlapping section of the connect tube and the clamp housing, wherein: either the clamp housing as an inner element is pushed into the connect tube as an outer element, or the connect tube as an inner element is pushed into the clamp housing as an outer element, wherein at least two through-apertures are formed in the overlapping section of the inner element located with an angular offset in the circumferential direction and an inwardly facing ring groove is formed in the overlapping section of the outer element, and at least one connecting element engages through the at least two through-apertures of the inner element into the ring groove of the outer element to connect the clamp housing to the sheath device such that the clamp housing can be rotated relative to the connect tube of the sheath device.

2 . The medical device according to claim 1 , further comprising a release arrangement cooperating with each connecting element, wherein the release arrangement is actuated by moving the control wire in the proximal direction when the clamp arms have been closed to bring the connecting element(s) out of engagement from the ring groove of the outer element to release the clamp housing from the sheath device.

3 . The medical device according to claim 2 , wherein the medical device comprises exactly one connecting element, which has at least two connecting arms located with a regular angular offset in the circumferential direction, each of the connecting arms engaging through one corresponding through-aperture formed in the inner element into the ring groove formed in the outer element.

4 . The medical device according to claim 3 , wherein the connecting element is formed as a disc having a central opening and at least two connecting arms protruding radially outwardly.

5 . The medical device according to claim 4 wherein the release arrangement comprises an intermediate tube enclosing the control wire and arranged between the connecting element and a coupling head formed at the distal end of the control wire so that the intermediate tube pushes the connecting element in the proximal direction when the control wire is moved in the proximal direction and the clamp arms have been closed in order to bring the connecting element out of engagement from the ring groove formed in the outer element, thus releasing the clamp housing from the connect tube.

6 . The medical device according to claim 3 , wherein the connecting element comprises a proximal main section in the form of a disc having a central opening and at least two connecting arms extending distally therefrom, wherein engagement portions are formed at the distal ends of the connecting arms and extend radially outwardly through the through-apertures of the inner element and into the ring groove formed in the outer element.

7 . The medical device according to claim 6 , wherein the release arrangement comprises an intermediate tube enclosing the control wire and arranged between the connecting element and a coupling head formed at the distal end of the control wire so that the intermediate tube pushes the connecting element in the proximal direction when the control wire is moved in the proximal direction and the clamp arms have been closed in order to bring the connecting element out of engagement from the ring groove formed in the outer element, thus releasing the clamp housing from the connect tube.

8 . The medical device according to claim 2 , wherein at least two connecting elements are provided in the form of resilient, elastically deformable connecting arms, wherein the distal ends of the connecting elements are fixedly attached to the clamp housing and the free proximal ends of the connecting elements form engagement portions, each of which engages through a corresponding through-aperture formed in the inner element and into the ring groove formed in the outer element.

9 . The medical device according to claim 8 , wherein the release arrangement comprises a protrusion, that is arranged between and cooperates with the connecting elements in such a way, that the protrusion presses against the connecting elements elastically deforming them outwardly, so that the engagement portions of the connecting elements are urged outwardly into engagement with a corresponding through-aperture and the ring groove, in order to connect the clamp housing to the sheath device, wherein the protrusion is coupled with the control wire in such a way that, if after closing the clamp arms the control wire is moved further in the proximal direction, the protrusion is moved together with the control wire out of engagement from the connecting elements with the result that the latter are deformed inwardly by their elastic restoring force and the engagement portions of the connecting elements come out of engagement of the corresponding ring groove of the outer element to release the clamp housing from the sheath device.

10 . The medical device according to claim 9 , wherein the protrusion is formed by a coupling head formed at the distal end of the control wire.

11 . The medical device according to claim 1 , wherein the connect tube and the sheath are welded or brazed or pressed together.

12 . The medical device according to claim 1 , wherein the sheath is an extendable coiled sheath.

Assignees

• Micro Tech Nanjing Co Ltd

Inventors

• Tang Zhi

Classifications

• A61B17/1285

  for minimally invasive surgery · CPC title

• A61B2017/00477

  Coupling (A61B2017/0046 takes precedence) · CPC title

• A61B17/122 Primary

  Clamps or clips, e.g. for the umbilical cord {(for the vas deferens A61F6/206)} · CPC title