Hemostatic clip shortening system

Abstract

To provide a clip device for an endoscope that treats a tissue.SOLUTION: A device comprises a clip 101 with a capsule 106. The capsule includes a channel 128 that extends through the capsule. The clip includes a single clip member that forms first and second clip arms 104. The first and second clip arms are connected to each other so as to be movable between an opened form and a closed form, and extend their distal ends 108 outwardly from the channel to be received within the channel. The device also includes a control wire connected to a yoke 120. The yoke is detachably coupled to the clip member so as to move the first and second clip arms between the opened form and the closed form. A pair of locking fingers is configured to detachably engage with the locking mechanism of the capsule so as to lock the first and second clip arms in the closed form when the yoke is separated from the single clip member.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to endoscopic devices, and more particularly to endoscopic clipping devices for treating tissue along the gastrointestinal tract. [Background technology]

[0002] During endoscopic gastrointestinal (GI) procedures, patients may be at risk for perforation of the GI tract wall or may need to occlude the GI tract wall as part of the procedure. Hemostatic clips may be used, for example, to occlude mucosal / submucosal defects, bleeding ulcers, arteries, polyps, diverticula, as well as to occlude luminal perforations. Depending on the size of the defect, multiple clips may be required. Summary of the Invention

[0003] The present invention relates to a device for treating tissue comprising a capsule including a channel extending longitudinally from a proximal end to a distal end and extending therethrough with first and second clip arms, the proximal ends of the first and second clip arms being received within the channel such that the first and second clip arms are movable relative to one another between an open configuration and a closed configuration. The deployment mechanism includes a tension member connected to the proximal ends of the first and second clip arms and a yoke releasably coupled to the tension member and longitudinally movable relative to the capsule to move the first and second clip arms between the open and closed configurations. The tension member and yoke are configured to separate from one another in response to a predetermined proximal force on the tension member to release the device from its proximal portion. A locking mechanism is coupled to the deployment mechanism and includes a pair of locking fingers configured to engage corresponding locking features of the capsule to lock the first and second clip arms in the closed configuration when the yoke is separated from the tension member.

[0004] In one embodiment, the first and second clip arms can be formed by a one-piece clip element extending from a first end to a second end and including a bend along a portion thereof, the bend extending along a midpoint of the one-piece clip element such that the lengths of the first and second clip arms are generally consistent.

[0005] In certain embodiments, the distal end of the tension member can be connected to the proximal end of the clip arm by a pin that extends diametrically across the distal end of the tension member and through a generally rounded space formed in the proximal end of the clip arm by the bend along the one-piece clip element.

[0006] In embodiments, the locking mechanism can include a ring coupled to the distal end of the tension member by a pin, with a pair of locking fingers extending proximally from the ring. In certain embodiments, the locking fingers can be biased radially outwardly and include a locking structure extending from a proximal end thereof.

[0007] In certain embodiments, the yoke can include a pair of overhangs that restrain the proximal ends of the locking fingers against the yoke and prevent the locking structure from engaging the locking mechanism of the capsule until the yoke is separated from the tension member.

[0008] In certain embodiments, the length of the capsule may range from about 7.5 mm to 8.5 mm. In one embodiment, the first and second clip arms can be biased toward an open configuration such that when the first and second clip arms are retracted proximally into the capsule, the first and second clip arms are constrained in a closed configuration and when the first and second clip arms are moved distally out of the capsule, the first and second clip arms can return to their biased open configuration.

[0009] The present invention also relates to a clip device comprising a clip, the clip including a capsule extending longitudinally from a proximal end to a distal end and including a channel extending therethrough. The proximal ends of the first and second clip arms are adapted to be slidably received within the channel of the capsule to move the first and second clip arms relative to one another between an open configuration and a closed configuration. The deployment mechanism includes a tension member connected to the proximal ends of the first and second clip arms. A yoke is releasably coupled to the tension member and coupleable to a control member, the yoke being movable relative to the capsule to move the first and second clip arms between the open configuration and the closed configuration. The tension member and yoke are configured to separate in response to a predetermined proximal force on the tension member. A locking mechanism is coupled to the deployment mechanism. The locking mechanism includes a pair of locking fingers configured to respectively engage corresponding locking features of the capsule to together lock the first and second clip arms in the closed configuration when the yoke is separated from the tension member. The proximal portion is releasably coupled to a proximal end of the capsule such that when the yoke is separated from the tension member, the clip is released from the proximal portion and placed in the body over the target tissue.

[0010] In one embodiment, the first and second clip arms can be formed by a one-piece clip element extending from a first end to a second end and including a bend along a portion thereof, the bend extending along a midpoint of the one-piece clip element such that the lengths of the first and second clip arms are generally consistent.

[0011] In one embodiment, the distal end of the tension member can be connected to the proximal end of the clip arm by a pin that extends diametrically across the distal end of the tension member and through a generally rounded space formed in the proximal end of the clip arm by a bend along the one-piece clip element.

[0012] In embodiments, the locking mechanism can include a ring coupled to the distal end of the tension member by a pin, with a pair of locking fingers extending proximally from the ring. In certain embodiments, each of the locking fingers can be biased radially outwardly and include a locking structure extending from a proximal end thereof.

[0013] In certain embodiments, the yoke can include a pair of overhangs that restrain the proximal ends of the locking fingers against the yoke and prevent the locking structure from engaging the locking mechanism of the capsule until the yoke is separated from the tension member.

[0014] In certain embodiments, the length of the capsule may range from about 7.5 mm to 8.5 mm. The present invention also relates to a method for treating a target tissue, wherein a clipping device is inserted through a working channel of an endoscope to a target site within the body until a clip of the clipping device extends distally past a distal end of the working channel. The clipping device includes a capsule and a pair of clip arms with proximal ends slidably received within the capsule. The clipping device is moved between an open configuration and a closed configuration until a selected target tissue is grasped between a first end and a second end of a one-piece clip element, the first and second clip arms being moved between the open and closed configurations by a control wire coupled to a yoke that is releasably coupled to a tensioning member connected to the first and second clip arms. Once the target tissue is grasped as desired, the clipping device is locked in the closed configuration by applying a predetermined proximal force along the control member to separate the yoke from the tensioning member, thereby allowing a locking finger of the locking mechanism to engage a corresponding locking feature of the capsule. [Brief description of the drawings]

[0015] [Figure 1] 1 is a longitudinal side view of an apparatus according to an exemplary embodiment of the present invention; [Diagram 2] 2 is a partial perspective view of a longitudinal side of a clip according to the device of FIG. 1; [Diagram 3] 3 is a partial perspective view of another longitudinal side of the clip of FIG. 2 in an open configuration. [Figure 4] 3 is a partial perspective view of another longitudinal side of the clip of FIG. 2 rotated 90 degrees about its longitudinal axis and in an open configuration. [Diagram 5] FIG. 3 is a perspective view of the clip deployment mechanism, locking mechanism, and clip arm of FIG. 2. [Figure 6] FIG. 3 is a perspective view of the deployment mechanism and locking mechanism of the clip of FIG. 2. [Figure 7] FIG. 3 is a longitudinal side view of the clip deployment mechanism and clip arms of FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The present invention may be further understood by reference to the following description and the accompanying drawings, in which like elements are labeled with the same reference numerals. The present invention relates to an endoscopic clipping device for treating internal tissue perforations, defects, and / or bleeding. In some embodiments, a shorter deployed clip may be preferred to allow for better visualization of the target site and better maneuverability when placing multiple clips. An exemplary embodiment of the present invention describes a clip including clip arms formed by a one-piece element that is slidable within a capsule to move the clip between an open configuration and a closed configuration that clips the target tissue as desired. The one-piece element is connected to separate deployment and locking mechanisms to reduce the length of the deployed clip compared to other conventional clip designs that include a capsule. Those skilled in the art will appreciate that the terms proximal and distal are intended herein to refer to directions toward and away from the user of the device, respectively.

[0017] 1-7, a clipping device 100 according to an exemplary embodiment of the present invention includes a clip 101 including a one-piece element 102 forming a pair of clip arms 104 received within a capsule 106, the clip arms 104 moving between an open configuration in which tips 108 of the clip arms 104 are separated from one another and a closed configuration in which the tips 108 are drawn toward one another to grasp tissue. In some embodiments, the one-piece element 102 extends from a first end 110 to a second end 112 and is bent, for example, at a junction or midpoint 114 to define the clip arms 104. The midpoint 114 is connected to a deployment mechanism 116 including a tension member 118 and a yoke 120 that are slidably received within the capsule 106 to move the clip arms 104 between the open and closed configurations.

[0018] The locking mechanism 122 is coupled to the one-piece element 102 and the deployment mechanism 116 such that the clip 101 is locked in a closed configuration when the clip 101 is deployed in the body over the target tissue. In one embodiment, as shown in FIG. 1, the clip 101 is releasably coupled to an elongated proximal portion 160 of the device 100 that is sized to facilitate insertion of the clip 101 through a working channel of an endoscope to a target site in the body while the proximal end remains outside the body accessible to a user. The proximal portion 160 may include, for example, a handle member 162 that includes an actuator 164 that allows a user to control the movement and deployment of the clip 101, and a flexible shaft 166 that extends distally from the handle member 162 to the clip 101. A distal end 168 of the flexible shaft 166 is releasably coupled to the clip 101, for example, via a bushing 172. A user manipulates the actuator 164 to move a control member 170 that extends from the handle member 162 through a flexible shaft 166 and connects to the clip arms 104 to control the movement of the clip arms 104 between the open and closed configurations.

[0019] The capsule 106 includes a channel 128 extending from the proximal end 124 to and through the distal end 126. In one embodiment, the proximal end 124 is configured to be releasably coupled to a proximal portion of the device via a tab 130 at the proximal end 124 of the capsule 106, which may be crimped radially inwardly at its edge to engage a corresponding portion of the proximal end portion. The capsule 106 also includes, for example, a locking mechanism formed in the capsule wall, such as a locking window 132 extending laterally through the capsule wall to engage a portion of the locking mechanism 122, as described in more detail below.

[0020] In one embodiment, the length of the capsule 106 may range from 7.5 mm to 8.55 mm. The capsule 106 in this embodiment is generally shorter than the capsule length of some conventional clips, which may have lengths ranging from 12.5 mm to 13.5 mm. Those skilled in the art will appreciate that the one-piece design of the clip arms 104 and separate locking mechanism 122, described in detail below, allows the length of the capsule 106 to be shortened compared to some existing clips without sacrificing the opening width of the clip arms 104.

[0021] As mentioned above, the clip arms 104 are formed from a one-piece element 102 that extends along its length from a first end 110 to a second end 112 and is bent, for example, at a midpoint 114 such that the clip arms 104 extend along a portion of their length from either side of the midpoint 114, for example, to a point closest to the first and second ends 110, 112. In this manner, the first and second ends 110, 112 of the one-piece element 102 correspond to the distal ends 108 of the clip arms 104. The midpoint 114 is connected to a retention mechanism 116 that is slidably received within a channel 128 of the capsule 106, such that the clip arms 104 are movable between an open configuration and a closed configuration.

[0022] In one embodiment, the clip arms 104 are biased toward the open configuration such that when advanced distally out of the capsule 106, the clip arms 104 move away from one another under their natural bias to the open configuration. When the arms 104 are drawn proximally into the capsule 106, the clip arms 104 are constrained by the walls of the capsule 106 and drawn together to a closed position with the tips 108 adjacent one another. Those skilled in the art will appreciate that any number of other mechanisms for opening and closing the clip arms 104 may be used. Those skilled in the art will also appreciate that while the exemplary embodiment shows and describes a one-piece element 102 that includes a bend to form the clip arms 104, in alternative embodiments, the proximal ends of the clip arms may be attached to one another such that the proximal ends are connectable to the tension member 118.

[0023] The clip arms 104 in this embodiment also include engagement features 134 extending therefrom and configured to engage a portion of the capsule 106 such that when the engagement features 134 engage the capsule 106, the clip arms 104 are prevented from being moved further proximally into the capsule 106. In one embodiment, the engagement features 134 extend laterally outward from each portion of the clip arms 104 such that the portions of the clip arms 104 distal to the engagement features 134 are wider than the portions of the clip arms 104 proximal to the engagement features 134. The portions of the clip arms 104 extending proximally of the engagement features 134 are sized to be able to draw those portions of the clip arms 104 proximally into the capsule 106.

[0024] The proximal portions of the clip arms 104 are drawn proximally into the capsule 106 such that the engagement features 134 abut a portion of the distal surface 127 of the capsule 106 and prevent the clip arms 104 from being drawn further proximally into the capsule 106. The engagement features 134 are positioned along the length of the clip arms 104 such that where the engagement features 134 engage the capsule 106, the clip arms 104 are drawn proximally sufficiently into the capsule 106 to draw the clip arms 104 together into the closed configuration. In one example, the engagement features 134 are configured as wings extending laterally from each longitudinal edge of the clip arms 104.

[0025] The tension member 118 extends from a proximal end 136, which is configured to be releasably coupled to the yoke 120, to a distal end 138, which is attached to the midpoint 114 of the one-piece element 102, for example, by a pin 140. In one embodiment, the distal end 138 extends beyond the midpoint 114 such that the pin 140, which extends diametrically across the distal end 138, is received within a generally rounded space at the proximal end 158 of the clip arm 104, which is defined by the bend in the one-piece element 102 at the midpoint 114. In other words, the pin 140 extends distally proximate the midpoint 114 such that the pin 140 extends between the pair of arms 104 along the inner surface of the one-piece element 102 along the bend at the midpoint 114. The tension member 118 and pin 140 are connected to the one-piece element 102 such that longitudinal movement of the tension member 118 relative to the capsule 106 corresponds to movement of the clip arm 104 relative to the capsule 106. A proximal end 136 of the tension member 118 is sized and shaped to engage a correspondingly sized and shaped portion of the yoke 120. In one embodiment, the proximal end 136 includes a generally C-shaped protrusion.

[0026] The yoke 120 extends from a proximal end 142, which is configured to be connected to a control member, such as a pull wire, to a distal end 144, which is configured to releasably engage the proximal end 136 of the tension member 118. In one embodiment, the distal end 144 includes a generally C-shaped recess 146 that is sized and shaped to receive a C-shaped protrusion on the proximal end 136. As described in more detail below, the proximal end 136 of the tension member 118 and the distal end 144 of the yoke 120 are configured to disengage from one another upon receipt of a predetermined force.

[0027] In one embodiment, the width along at least a portion of the yoke 120 generally matches the width (e.g., diameter) of the channel 128 of the capsule 106 such that when the yoke 120 is disposed within the proximal end 124 of the capsule 106, the yoke 120 engages the tabs 130 and moves the tabs 130 radially outwardly and out of engagement with the proximal portion of the device. The yoke 120 also includes a pair of overhangs 148 extending distally from a portion thereof. As described in more detail below, the overhangs 148 are configured to restrain the proximal ends 154 of the locking arms 152 of the locking mechanism 122 such that the locking arms 154 are prevented from engaging the locking mechanism 134 of the capsule 106 until the clip 101 is deployed over the target tissue.

[0028] The locking mechanism 122 includes a locking arm 152 that is attached to the tension member 118 and is constrained by the yoke 120 until the clip 101 is deployed, as described above. In one embodiment, the locking mechanism 122 includes a ring 150 and a pair of locking arms 152 that extend proximally from the ring 150. The ring 150 is attached to the tension member 118 by the same pin 140 that connects the tension member 118 to the clip arms 104. In particular, the pin 140 extends diametrically across the ring 150 such that the ring 150 extends around both the distal end 138 of the tension member 118 and the proximal end 158 of the clip arms 104.

[0029] The locking arms 152 extend proximally from opposite sides of the ring 150 to a proximal end 154, and in one embodiment, are biased radially outward. The ring 150 is connected to the tension member 118 such that the locking arms 152 extend along opposite sides of the tension member 118 and are restrained by the overhangs 148 of the yoke 120. The proximal ends 154 of the locking arms 152 include locking structures 156 extending therefrom such that the locking structures 156 engage the locking mechanisms 132 of the capsule 106 when the proximal ends 154 are permitted to return to their biased configuration. In one embodiment, the locking structures 156 are configured as locking tabs extending from the proximal ends 154 that engage the locking windows 132 of the capsule 106 when the proximal ends 154 are released from the overhangs 148. As described in detail below, when a predetermined force is applied to the yoke 120 to separate the yoke 120 from the tension member 118, the base ends 154 are released and allowed to return to their radially outward biased configuration.

[0030] According to an exemplary method, the clip 101 of the clipping device 100 is inserted into a target site within the body, for example, via a working channel of an endoscope. The clip 101 is inserted through the working channel in a closed configuration so that the clip arms 104 do not damage the interior of the working channel. Once the clip 101 reaches the target site, the clip arms 104 are moved distally relative to the capsule 106 such that distal portions of the clip arms 104 extend out of the capsule 106 and are free to move toward the open configuration under the natural bias of the clip arms 104 so that the target tissue may be received between the clip arms 104. The clip 101 may be repeatedly moved between the open and closed configurations until the target portion of tissue is positioned between the clip arms 104 as desired. The user then pulls the clip arms 104 proximally into the capsule 106, and as the clip arms 104 are pulled into the capsule 106, the clip arms 104 are drawn toward each other to grasp the target tissue between the tips 108 of the clip arms 104. As described above, the clip 101 may be moved between the open and closed configurations by, for example, movement of a control member 170 coupled to the yoke 120.

[0031] When the user is satisfied that the clip 101 is in the desired position gripping the target tissue, the user continues to apply increasing force to the control member 170 in a proximal direction such that the yoke 120 and tension member 118 disengage from one another after the engagement mechanism 134 engages the capsule 106 as described above, until the yoke 120 moves proximally away from the tension member 118 with a preset force. When the yoke 120 is separated from the tension member 118, the proximal ends 154 of each of the locking mechanisms 122 of the clip arms 104 are released from the overhangs 148 of the yoke 120, causing them to free to sprung back towards their radially outward biased configuration until the locking tabs 156 respectively engage the locking windows 132 of the capsule 106, thereby locking the clip 101 in the closed configuration.

[0032] The yoke 120 may then be pulled further proximally relative to the capsule 106 (e.g., by a control member connected thereto) until a portion of the yoke 120 having a width corresponding to the channel 128 of the capsule 106 is disposed within the proximal end 124 of the capsule 106, forcing the radially inwardly bent tabs 130 to bend radially outward, for example, out of engagement with the bushing 172 of the proximal portion 160 of the device 100 and separating the clip 101 from the proximal portion 160. In this manner, the clip 101 remains clipped over the target tissue while the proximal portion 160 may be removed from the body. In one embodiment, upon separation of the clip 101 from the proximal portion 160, the tabs 130 return to their radially inwardly bent configuration and the yoke 120 remains attached to the proximal end 124 of the capsule 106, although separated from the tension member 118.

[0033] In this embodiment, further proximal force applied to control member 170 separates the control member from yoke 120, leaving clip 101 within the body and allowing proximal portion 160 of device 100, including control member 170, to be removed therefrom. According to another embodiment, once capsule 106 has separated from proximal portion 160, yoke 120 can be pulled proximally out of capsule 106 such that clip 101 remains within the body and clipped above the target tissue, while proximal portion 160 and yoke 120 may be removed from the body.

[0034] (Additional Note) As a preferred embodiment, the technical ideas that can be understood from the above embodiment will be described below. [Appendix 1] 1. A device for treating tissue, comprising: a clip including a capsule having a channel extending longitudinally therethrough from a proximal end to a distal end, the clip including a unitary clip member forming first and second clip arms, the proximal ends of the first and second clip arms being joined to one another and received within the channel with distal ends of the first and second clip arms extending outside the channel such that the first and second clip arms are movable relative to one another between an open configuration and a closed configuration; a control wire connected to a yoke releasably coupled to the clip, the yoke being movable by manipulation of the control wire to move the clip members forming the first and second clip arms between the open and closed configurations, the control wire and the clip members being configured to separate from one another to release the clip from a proximal portion of the device; a locking mechanism releasably engaged with the yoke, the locking mechanism including a pair of locking fingers configured to engage corresponding locking features of the capsule to lock the first and second clip arms in the closed configuration when the yoke is separated from the clip member. Device. [Appendix 2] 2. The device of claim 1, wherein the locking mechanism is releasably coupled to a tension member, the tension member being coupled to the clip member via a pin in the tension member and around which the clip member is bent. [Appendix 3] 3. The device of claim 2, wherein the clip member is bent around the pin at an intermediate position of the clip member to define base ends of the first and second clip arms such that a length of the first clip arm corresponds to a length of the second clip arm. [Appendix 4] 3. The device of claim 2, wherein the control wire is connected to the clip member via the yoke and the tensioning member, the tensioning member is connected to the locking mechanism, and the pin extends through a rounded space formed at the proximal ends of the first and second clip arms and across the distal end of the tensioning member. [Appendix 5] 5. The device of claim 4, wherein the locking mechanism includes a ring coupled to the distal end of the tension member via the pin, the pair of locking fingers extending proximally from the ring. [Appendix 6] 3. The device of claim 2, wherein the pair of locking fingers are biased radially outward and include a locking structure extending from a proximal end thereof. [Appendix 7] 7. The apparatus of claim 6, wherein the yoke includes a pair of overhangs configured to restrain the proximal ends of the pair of locking fingers from engaging with the locking mechanism of the capsule while the yoke is coupled to the tension member. [Appendix 8] 8. The device of any one of claims 1-7, wherein the first and second clip arms are biased toward the open configuration such that when the first and second clip arms are retracted proximally into the capsule, the first and second clip arms are constrained in the closed configuration and when the first and second clip arms are moved distally out of the capsule, the first and second clip arms can return to their biased open configuration. [Appendix 9] 1. A clip device comprising: a clip including a capsule having a channel extending longitudinally from a proximal end to a distal end and extending therethrough, a proximal portion of a clip member slidably received within the channel of the capsule, the clip member defining first and second clip arms having distal ends extending outside the capsule for moving the first and second clip arms relative to one another between an open configuration and a closed configuration, the proximal ends of the first and second clip arms joined together; a control wire connected to a yoke releasably coupled to the clip, the yoke being movable relative to the capsule by manipulation of the control wire to move the first and second clip arms between the open and closed configurations, the control wire and the clip member being configured to be separable from one another to release the clip from the proximal portion of the clip device; a locking mechanism releasably engaged with the yoke, the locking mechanism including a pair of locking fingers configured to respectively engage corresponding locking features of the capsule to lock the first and second clip arms in the closed configuration when the yoke is separated from the clip member. Clip device. [Appendix 10] 10. The clip device of claim 9, wherein the clip member is bent at an intermediate portion thereof to form base ends of the first and second clip arms such that the length of the first clip arm corresponds to the length of the second clip arm. [Appendix 11] 11. The clip device of claim 10, further comprising a tension member releasably coupled to the yoke and coupled to the clip member via a pin on the tension member, the pin extending across a distal end of the tension member and through a rounded space formed in a bent portion of the clip member. [Appendix 12] 12. The clip device of claim 11, wherein the locking mechanism includes a ring coupled to the distal end of the tension member via the pin, the pair of locking fingers extending proximally from the ring. [Appendix 13] 12. The clip device of any one of claims 9 to 11, wherein the locking fingers are biased radially outward and include locking structures extending from proximal ends thereof. [Appendix 14] 14. The clip device of claim 13, wherein the yoke includes a pair of overhangs that restrain the proximal ends of the locking fingers relative to the yoke and prevent the locking structure from engaging the locking mechanism of the capsule until the clip is deployed. Those skilled in the art will recognize that various modifications can be made in the present invention without departing from the scope of the invention.

Claims

1. 1. A device for treating tissue, comprising: a clip having a capsule including a channel extending therethrough, the clip including a single clip member forming first and second clip arms, the first and second clip arms being connected to one another and received within the channel with distal ends extending outside the channel such that the first and second clip arms are movable relative to one another between an open configuration and a closed configuration; a control wire connected to a yoke, the yoke being releasably coupled to the single clip member such that movement of the control wire moves the yoke to move the first and second clip arms between the open and closed configurations; a locking mechanism including a pair of locking fingers configured to releasably engage a locking feature of the capsule to lock the first and second clip arms in the closed configuration when the yoke is separated from the single clip member.

2. The device of claim 1 , wherein the locking mechanism is separate from the single clip member.

3. The device of claim 1 , wherein the single clip member is separate from the control wire.

4. Further comprising a pin; the locking mechanism is releasably coupled to a tension member; The apparatus of claim 1 , wherein the tension members are coupled to the single clip member via the pin around which the single clip member is bent.

5. 5. The device of claim 4, wherein the single clip member defines proximal ends of the first and second clip arms that bend around the pin at an intermediate position of the single clip member to connect the first and second clip arms to one another such that a length of the first clip arm corresponds to a length of the second clip arm.

6. 6. The device of claim 5, wherein the control wires are connected to the single clip member via the yoke and the tensioning member, the tensioning member being connected to the locking mechanism, and the pin extends through rounded spaces formed in the proximal ends of the first and second clip arms and across the distal end of the tensioning member.

7. The device of claim 6 , wherein the locking mechanism includes a ring coupled to the distal end of the tension member via the pin, the locking fingers extending proximally from the ring.

8. The device of claim 7 , wherein the pair of locking fingers are biased radially outwardly and include locking structures extending from their proximal ends.

9. 9. The device of claim 8, wherein the yoke includes a pair of overhangs, each configured to restrain a proximal end of a corresponding one of its locking fingers relative to the yoke while the yoke is connected to the tension member such that the locking structure is prevented from engaging the locking mechanism of the capsule before the clip is deployed.

10. 10. The device of claim 1, wherein the capsule is about 7.5 to 8.5 mm in length.

11. 2. The device of claim 1, wherein the first and second clip arms are biased toward the open configuration such that when the first and second clip arms are retracted proximally into the capsule, the first and second clip arms are constrained in the closed configuration and when the first and second clip arms are moved distally out of the capsule, the first and second clip arms can return to their biased open configuration.

12. 1. A clip device comprising: a clip including a capsule having a channel extending therethrough, the clip including a single clip member forming first and second clip arms, proximal portions of the first and second clip arms connected to one another and received within the channel of the capsule with distal portions of the first and second clip arms extending from the capsule, thereby allowing the first and second clip arms to move relative to one another between an open configuration and a closed configuration; a control wire connected to a yoke releasably coupled to the clip, such that movement of the control wire moves the first and second clip arms through the yoke and the clip between the open and closed configurations; a locking mechanism releasably engaged with the yoke and including a pair of locking fingers configured to engage a locking feature of the capsule to lock the first and second clip arms in the closed configuration when the yoke is separated from the single clip member; A clip device comprising an insert portion releasably coupled to a proximal end of the capsule, whereby separation of the yoke from the tension member causes the control wire and the single clip member to separate from one another and release the clip from the insert portion and deploy the clip.

13. The clip device of claim 12 , wherein the clip is separate from the control wire and the locking mechanism.

14. Further comprising a pin; the locking mechanism is releasably coupled to the tension member; The clip device of claim 12 , wherein the tension members are coupled to the single clip member via the pin around which the single clip member is bent.

15. 15. The clip device of claim 14, wherein the single clip member defines proximal ends of the first and second clip arms that bend around the pin at an intermediate position of the single clip member to connect the first and second clip arms to one another such that a length of the first clip arm corresponds to a length of the second clip arm.

16. 16. The clip device of claim 15, wherein the control wires are connected to the single clip member via the yoke and the tensioning member, the tensioning member being connected to the locking mechanism, and the pin extends through rounded spaces formed in the proximal ends of the first and second clip arms across the distal end of the tensioning member.

17. The clip device of claim 16 , wherein the locking mechanism includes a ring coupled to the distal end of the tension member via the pin, the pair of locking fingers extending proximally from the ring.

18. 20. The clip device of claim 17, wherein the locking fingers are biased radially outwardly and include a locking structure extending from a proximal end thereof.

19. 20. The clip device of claim 18, wherein the yoke includes a pair of overhangs configured to restrain the proximal ends of the locking fingers relative to the yoke while the yoke is connected to the tension member to prevent the locking structure from engaging the locking mechanism of the capsule.

20. 13. The clip device of claim 12, wherein the first and second clip arms are biased toward the open configuration such that when the first and second clip arms are retracted proximally into the capsule, the first and second clip arms are constrained in the closed configuration and when the first and second clip arms are moved distally out of the capsule, the first and second clip arms can return to their biased open configuration.

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