An adjustable bend sheath control system and anchoring system

Abstract

The application provides a surgical device, in particular a controllable bending sheath control system, comprising: a controllable bending sheath tube, which comprises an inner tube unit and an outer tube; the inner tube unit is arranged inside the outer tube, and a distal end of the inner tube unit partially extends out of the outer tube to form a bending control section; a telescopic control subsystem, which is connected with the inner tube unit and controls movement of the inner tube unit relative to an axis of the outer tube, so as to adjust an extension length of the bending control section relative to the outer tube; and a bending control subsystem, which is connected with the inner tube unit and controls a rotational movement of the distal end of the inner tube unit after the length of the bending control section is adjusted to a target length, wherein a rotation axis of the rotational movement is perpendicular to the axis of the outer tube.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a bend-adjustable sheath control system and an anchoring system. BACKGROUND

[0002] Abdominal aortic aneurysm (AAA) is a potentially fatal vascular disease, and the mortality rate after rupture is as high as 80%-90%. With the aging of the population and the progress of imaging technology, the detection rate of AAA has been increasing year by year, and endovascular aortic repair (EVAR) has become the preferred method for treating AAA due to its minimally invasive and quick recovery characteristics. However, postoperative complications such as stent migration, endoleak and stent structural failure are still major challenges that affect long-term prognosis. In view of the above challenges, there are schemes in the related art to increase the stability of the stent by adding anchoring elements. However, the existing technology has many problems such as large gap between the peritoneal stent and the blood vessel wall, limited number of attack rings and attack depth of the anchoring element, etc., which leads to the consequences that the gap cannot be changed after the anchoring element is attacked or even the gap increases when the anchoring element is attacked again. In addition, in the related art, the anchoring element is not accurately positioned, and cannot be applied to narrow spaces, which is inconvenient to operate. Therefore, there is an urgent need for a surgical device that can be applied to narrow spaces, accurately position the anchoring position, eliminate the problems of large gap and limited number of attack rings in the existing technology after anchoring, and is convenient to operate. SUMMARY

[0003] In order to overcome at least one of the many problems in the related art, the present application provides a bend-adjustable sheath control system, comprising:

[0004] a bend-adjustable sheath tube, comprising an inner tube unit and an outer tube;

[0005] The inner tube unit is arranged inside the outer tube, and the distal end of the inner tube unit partially protrudes out of the outer tube to form a bend control section;

[0006] a telescopic control subsystem connected to the inner tube unit and controlling the movement of the inner tube unit relative to the axis of the outer tube to adjust the protruding length of the bend control section relative to the outer tube;

[0007] a bend control subsystem connected to the inner tube unit and controlling the rotational movement of the distal end of the inner tube unit after the length of the bend control section is adjusted to the target length, wherein the rotation axis of the rotational movement is perpendicular to the axis of the outer tube.

[0008] In some optional embodiments, the inner tube unit comprises a rotary joint, an inner tube and a connecting rod.

[0009] The distal end of the inner tube and the distal end of the connecting rod are both connected to the rotary joint, and the rotary joint is rotatable relative to the distal end of the connecting rod;

[0010] The distal end of the inner tube and the distal end of the connecting rod at least partially extend from the distal end of the outer tube to form the bending control section.

[0011] In some optional embodiments, the proximal end of the connecting rod is connected to the telescopic control subsystem;

[0012] The proximal end of the inner tube is connected to the bending control subsystem;

[0013] The telescopic control subsystem controls the movement of the connecting rod along the axis of the outer tube to adjust the length of the bending control section;

[0014] The bending control subsystem adjusts the relative position between the inner tube and the connecting rod to adjust the rotation angle of the rotary joint.

[0015] In some optional embodiments, the telescopic control subsystem includes a telescopic knob and a telescopic housing, and the telescopic knob and the telescopic housing are threadedly connected;

[0016] The proximal end of the connecting rod is connected to the telescopic housing.

[0017] In some optional embodiments, the bending control subsystem includes a bending knob and a bending slider, and the bending knob and the bending slider are threadedly connected;

[0018] The proximal end of the inner tube is connected to the bending slider.

[0019] In some optional embodiments, the telescopic housing is provided with a first guide groove, the bending slider is provided with a first guide protrusion, and the first guide protrusion and the first guide groove are in sliding fit to enable the bending slider to only move in translation.

[0020] In some optional embodiments, a main housing is further included, the main housing is provided with a second guide groove, the telescopic housing is provided with a second guide protrusion, the telescopic housing is arranged in the main housing, and the second guide protrusion and the second guide groove are in sliding fit to enable the telescopic housing to only move in translation.

[0021] In some optional embodiments, an outer tube mounting seat is further included, the outer tube mounting seat is arranged in the main housing and connected to the proximal end of the outer tube.

[0022] In some optional embodiments, the telescopic knob is sleeved on the outside of the main housing and rotatable relative to the main housing.

[0023] In some optional embodiments, the bending control knob is sleeved on the outside of the telescopic housing and can rotate relative to the telescopic housing.

[0024] The present invention also provides an anchoring system comprising any of the adjustable bending sheath control systems described above; and further comprising:

[0025] An anchoring device, wherein the anchoring device is sleeved inside the inner tube unit and the distal end is located inside the bending control section;

[0026] The anchoring unit of the anchoring device includes an anchoring part. After the distal end of the inner tube unit is rotated to the target angle, the anchoring part anchors the first target and the second target, and reduces the gap between the first target and the second target.

[0027] In some optional embodiments, the anchoring unit further includes an anchoring base; the side of the anchoring base facing the anchoring part is used to limit the movement of the first target and the second target relative to the anchoring base during the anchoring process, but does not restrict the rotation of the anchoring part relative to the first target and the second target to reduce the gap between the first target and the second target;

[0028] The anchoring unit further includes a connection system, which is detachably connected to the anchoring base of the anchoring unit and drives the anchoring part to rotate when connected.

[0029] In some optional embodiments, the anchoring base is provided with a first locking part on the side away from the anchoring part;

[0030] The connection system includes a buckle, and the buckle is provided with a second locking part;

[0031] When the first locking part and the second locking part are connected, the anchoring unit is locked to the connection system; when the first locking part and the second locking part are separated, the anchoring unit is unlocked to the connection system.

[0032] In some optional embodiments, the anchoring device further includes a release wire, the distal end of which includes an unlocking portion;

[0033] The buckle includes a first elastic arm and a second elastic arm, and the second locking part is respectively disposed on the first elastic arm and the second elastic arm;

[0034] In the locked state, the first elastic arm and the second elastic arm are in the first position to lock the first locking part and the second locking part together; when unlocking, the unlocking part pushes the first elastic arm and the second elastic arm to the second position to separate the first locking part and the second locking part.

[0035] In some optional embodiments, the connecting system comprises a guide sleeve, which is detachably connected with the anchoring base of the anchoring unit;

[0036] The guide sleeve comprises a first connecting part, and the anchoring base is embedded in the first connecting part, so that the connecting system drives the anchoring unit to rotate.

[0037] In some optional embodiments, the anchoring system further comprises a locking mechanism, which is arranged at the proximal end of the adjustable bending control system, so as to fix the anchoring device at the proximal end of the adjustable bending control system.

[0038] The technical scheme of the present application has the following advantages or beneficial effects:

[0039] In some embodiments of the present application, the adjustable bending sheath control system comprises a telescopic control subsystem and a bending control subsystem, wherein the telescopic control subsystem can accurately adjust the telescopic length of the bending control section relative to the outer tube; and the telescopic length of the bending control section is adjusted to provide positioning for the subsequent anchoring process. In addition, the bending control section is only locally rotated at the distal end, and the distal end face of the bending control section can be accurately pointed to the target position, thereby improving the positioning accuracy, and finally enabling the anchoring device to be accurately anchored to the required target point.

[0040] In some embodiments of the present application, the inner tube unit comprises a rotary joint, an inner tube and a connecting rod; the distal end of the inner tube and the distal end of the connecting rod are both connected with the rotary joint, and the rotary joint can rotate relative to the distal end of the connecting rod; thus, the telescopic length of the bending control section is adjusted by utilizing the non-stretchable deformation characteristics of the connecting rod, and the telescopic length of the inner tube is changed to rotate the rotary joint at the target position by utilizing the supporting effect of the connecting rod, so as to realize accurate control of the bending support of the distal end of the inner tube unit; and finally, the anchoring device can be accurately anchored to the target position.

[0041] In some embodiments of the present application, the proximal end of the connecting rod is connected with the telescopic control subsystem, and the proximal end of the inner tube is connected with the bending control subsystem; the telescopic length of the bending control section is first accurately adjusted by controlling the connecting rod to move along the axis of the outer tube through the telescopic control subsystem; and then the relative position between the inner tube and the connecting rod is adjusted by the bending control subsystem to adjust the rotation angle and the bending height of the rotary joint; that is, the positioning of the anchoring position is realized through two steps, that is, the bending height is determined by the telescopic length of the connecting rod in the first step, and the accurate positioning of the anchoring angle is realized by the rotation angle of the rotary joint.

[0042] The telescopic control subsystem in some embodiments of the present application comprises a telescopic knob and a telescopic housing, which are threadedly connected; the proximal end of the connecting rod is connected with the telescopic housing, and the displacement caused by the screwing is small, so that the length of the bending control section can be accurately adjusted through the above-mentioned threaded fitting relationship.

[0043] The bending control subsystem in some embodiments of the present application comprises a bending knob and a bending slider, which are threadedly connected; the proximal end of the inner tube is connected with the bending slider, and the displacement caused by the screwing is small, so that the rotation angle of the rotary joint can be accurately adjusted through the above-mentioned threaded fitting relationship.

[0044] The anchoring system in some embodiments of the present application comprises an adjustable bending sheath control system and an anchoring device, wherein the bending control section of the adjustable bending sheath control system can accurately reach the target position under the adjustment of the telescopic control subsystem, and then the distal end of the inner tube unit is perpendicularly rotated relative to the axis of the outer tube to accurately point to the target anchoring point through the bending control of the bending control subsystem, and then the anchoring part is controlled to anchor, so as to realize the accurate control of the anchoring position. It is particularly advantageous that the first target and the second target can be continuously driven to the proximal end of the anchoring part during the rotation of the anchoring part, so as to realize the reduction of the gap between the first target and the second target, and to reduce or eliminate the internal leakage, stent displacement and other purposes. BRIEF DESCRIPTION OF DRAWINGS

[0045] The accompanying drawings serve to better understand the present application and do not constitute an improper limitation on the present application. Among them:

[0046] Figure 1 is an exploded schematic view of the anchoring system according to the embodiment of the present application;

[0047] Figure 2 is an assembly schematic view of the anchoring system according to the embodiment of the present application;

[0048] Figure 3 is a schematic view of the working state of the anchoring system according to the embodiment of the present application;

[0049] Figure 4 is a first local enlarged schematic view of the working state;

[0050] Figure 5 is a second local enlarged schematic view of the working state;

[0051] Figure 6 is a third local enlarged schematic view of the working state;

[0052] Figure 7 is a schematic view of the adjustable bending sheath control system according to the embodiment of the present application;

[0053] Figure 8 is a cross-sectional view of a steerable sheath control system according to an embodiment of the application;

[0054] Figure 9 is a shaft-side view of a steerable sheath control system according to an embodiment of the application;

[0055] Figure 10 is a partial enlarged view of a steerable sheath control system according to an embodiment of the application;

[0056] Figure 11 is a bending control view of a steerable sheath control system according to an embodiment of the application;

[0057] Figure 12 is a cross-sectional view of a steerable sheath control system according to an embodiment of the application in a bending control state;

[0058] Figure 13 is an exploded view of a steerable sheath control system according to an embodiment of the application;

[0059] Figure 14 is a schematic view of an anchoring device according to an embodiment of the application;

[0060] Figure 15 is a partial enlarged view of an anchoring device according to an embodiment of the application;

[0061] Figure 16 is a cross-sectional view of an anchoring device according to an embodiment of the application;

[0062] Figure 17 is a first cross-sectional view of a distal portion of an anchoring device according to an embodiment of the application;

[0063] Figure 18 is a second cross-sectional view of a distal portion of an anchoring device according to an embodiment of the application;

[0064] Figure 19 is an exploded view of a distal portion of an anchoring device according to an embodiment of the application;

[0065] Figure 20 is an assembly view of a distal portion of an anchoring device according to an embodiment of the application;

[0066] Figure 21 is a partial exploded view of a connection system according to an embodiment of the application. DETAILED DESCRIPTION

[0067] Exemplary embodiments of the present application are described herein with reference to the accompanying drawings, which are meant to be exemplary in nature, and include various details intended to facilitate understanding of the application. Thus, it should be apparent to those skilled in the art that various modifications and changes can be made in the embodiments described without departing from the scope and spirit of the application. Likewise, the description is not to be understood as implying that the application is limited to the particular forms described. For the sake of clarity, the description will not list every possible combination of features.

[0068] The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the application and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It also will be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0069] It should be understood that, although the terms first, second, third, etc. can be used herein to describe various information, these terms are not intended to denote a particular order or hierarchy. These terms are used only to distinguish one from another. For example, a first information can be termed a second information, and, similarly, a second information can be termed a first information, without departing from the scope of the application. As used herein, the term "if' can be interpreted to mean "when" or "upon" or "in response to determining" taking into account the context in which the term is used.

[0070] As can be seen from the description of the background art section, the operation of the anchor device in the related art is complicated, the positioning accuracy is poor, and the gap between the peritoneal stent and the blood vessel cannot be reduced after the anchor is attacked, and even the gap is increased when it is attacked again, i.e., there are always many problems. To this end, the present application provides an anchor system, which comprises: an adjustable bending sheath control system and an anchor device. The adjustable bending sheath control system comprises an adjustable bending sheath tube, a telescopic control subsystem and a bending control subsystem. The adjustable bending sheath tube comprises an inner tube unit and an outer tube, the inner tube unit is arranged inside the outer tube, and the distal end of the inner tube unit partially extends out of the outer tube to form a bending control section. The telescopic control subsystem is connected with the inner tube unit and controls the movement of the inner tube unit relative to the axis of the outer tube to adjust the extension length of the bending control section relative to the outer tube. The bending control subsystem is connected with the inner tube unit and controls the rotational movement of the distal end of the inner tube unit after the length of the bending control section is adjusted to the target length, wherein the rotation axis of the rotational movement is perpendicular to the axis of the outer tube. The anchor device is sleeved in the inner tube unit, and the distal end is located in the bending control section. The anchor unit of the anchor device comprises an anchor part, which anchors the first target and the second target and reduces the gap between the first target and the second target after the distal end of the inner tube unit is rotated to the target angle.

[0071] As Figure 1 and 2 shown in the embodiment, the anchor system body comprises two parts, the adjustable bending sheath control system 1002 and the anchor device 1001. Figure 1 The schematic diagram of the adjustable bending sheath control system 1002 and the anchor device 1001 is shown when they are not assembled; Figure 2 The schematic diagram of the adjustable bending sheath control system 1002 and the anchor device 1001 is shown when they are assembled. From Figure 2 It can be seen that when assembled, the anchor device 1001 penetrates from the proximal end of the adjustable bending sheath control system 1002 and extends to the distal end.

[0072] Referring to Figures 7 to 13 , the adjustable bending sheath control system comprises an adjustable bending sheath tube, a telescopic control subsystem and a bending control subsystem. The adjustable bending sheath tube comprises an inner tube unit and an outer tube 2002. The outer tube is a hollow tube body, and the inner tube unit is arranged in the hollow cavity inside the outer tube and can be controlled to move in the hollow cavity. As Figures 8 to 10 shown, the distal end of the inner tube unit partially protrudes from the outer tube to form a bending control section 2010. As Figure 10 shown, the bending control section 2010 can comprise a rotary joint 2004, an inner tube 2001 and a connecting rod 2003. Among them, the bending control section 2010 can protrude from the outer tube in the working state. In the working state, only the distal end of the inner tube 2001 and the connecting rod 2003 partially protrude from the distal end of the outer tube. As Figure 8 shown, adjacent to the bending control section is a main body section 2011.

[0073] The telescopic control subsystem is located at the proximal end of the anchor system to form a handle control part. The operator adjusts the protruding length of the bending control section by operating the telescopic control subsystem at the proximal end. Specifically, as Figure 8 and 13 shown, the telescopic control subsystem is connected to the proximal end of the connecting rod, and the corresponding control components on the handle are used to control the movement of the inner tube unit relative to the axis of the outer tube to adjust the protruding length of the bending control section relative to the outer tube. In practice, the components to be delivered, such as the anchor device, are arranged in the inner tube unit, and by adjusting the protruding length of the bending control section, the support of the bending control section can be improved to accurately attack the anchor device to the target position. Since the position of the bending control subsystem can be adjusted forward or backward by operating the handle, it is convenient for the operator to accurately adjust the position of the bending control section according to the needs during use, which greatly reduces the difficulty of the operator.

[0074] a bending control subsystem connected with the inner tube unit and configured to control the rotation of the distal end of the inner tube unit to point the distal end of the inner tube unit to a target position after the length of the bending control section is adjusted to the target length, wherein the rotation axis of the rotation is perpendicular to the axis of the outer tube. Figure 11 and 12 As shown in the figure, the distal end of the bending control section rotates around an axis perpendicular to the paper plane, while the axis of the outer tube extends in the direction parallel to the paper plane, so the rotation axis of the distal end is perpendicular to the extension axis of the outer tube. Since the bending control section only rotates locally at the distal end, the distal end of the bending control section can be accurately pointed to the target position, improving the positioning accuracy, and finally enabling the anchoring device to be accurately anchored to the desired target point.

[0075] The anchoring device is sleeved in the inner tube unit and has a distal end in the bending control section. The anchoring unit of the anchoring device includes an anchoring part configured to anchor a first target and a second target and reduce the gap between the first target and the second target after the distal end of the inner tube unit is rotated to a target angle. Figure 3 A schematic diagram showing the working state of the anchoring system is shown, wherein the anchoring system enters through the access established by the puncture sheath 1005 and reaches the target position with the assistance of the imaging device, i.e., reaches the aneurysm 1003 where the peritoneal stent 1004 is arranged. Figure 4 A partial enlarged view of 1007 in Figure 3 is shown. The anchoring device is used to anchor the peritoneal stent 1004 and the target blood vessel 10031. In actual operation, after reaching the target position, the bending form of the bending control section is controlled to make the distal end of the bending control section perpendicular to one side of the peritoneal stent wall and the other side of the bending control section abutting against the other side of the peritoneal stent wall, thereby providing good support force to the peritoneal stent and the blood vessel, and then the corresponding control unit is operated to make the anchoring part 3001 rotate into the blood vessel wall to be fixed. The anchoring part 3001 can rotate in situ, so that the first target (i.e., the peritoneal stent) and the second target (i.e., the blood vessel) are both driven to the proximal end of the anchoring part, thereby reducing the gap between the first target and the second target, reducing or eliminating the problems of endoleak, stent displacement, etc. After anchoring is completed, the anchoring part can be released, and the anchoring process can be repeatedly performed to implant the required number of anchoring parts. Figure 5 Figure 6 Three anchoring parts are shown in the figure, which do not constitute a limitation on the protection scope of the present application, and in practice, the number of anchoring parts can be reasonably selected as needed.

[0076] ​It can be seen from the above description that the anchoring system of the present application comprises two parts, i.e. an adjustable bending sheath control system and an anchoring device. The bending control section of the adjustable bending sheath control system can be accurately guided to the target position under the adjustment of the telescopic control subsystem, and then the distal end of the inner tube unit is rotated perpendicularly relative to the axis of the outer tube to accurately point to the target anchoring point by the bending control subsystem, and then the anchoring part is controlled to anchor, so as to realize the accurate control of the anchoring position. It is particularly advantageous that the first target and the second target can be continuously driven to the proximal end of the anchoring part during the rotation of the anchoring part, so as to realize the reduction of the gap between the first target and the second target, and to reduce or eliminate the internal leakage, stent displacement and other purposes.

[0077] In some optional embodiments, the inner tube unit comprises a rotary joint, an inner tube and a connecting rod; the distal end of the inner tube and the distal end of the connecting rod are connected with the rotary joint, and the rotary joint can rotate relative to the distal end of the connecting rod to drive the anchoring part to rotate; the distal end of the inner tube and the distal end of the connecting rod at least partially extend from the distal end of the outer tube to form the bending control section. See Figure 9 and Figure 10 wherein Figure 10 is Figure 9 is an enlarged view of the local part 4001. As shown in Figure 10 , the proximal end of the rotary joint 2004 is connected with the inner tube 2001 and the connecting rod 2003, respectively. The rotary joint and the inner tube are both hollow tube bodies and can allow the distal end of the anchoring device to pass through. The rotary joint and the inner tube are coaxially fixedly connected. The rotary joint and the connecting rod are rotatably connected, so that under the action of an external force, the rotary joint can rotate around the rotary connection point, i.e. the rotary joint can rotate relative to the distal end of the connecting rod. In some embodiments, the connecting rod cannot be stretched and deformed, thereby improving the position control accuracy of the rotary joint. Preferably, the connecting rod is provided in at least one, for example, one, two or more, to improve the rotation control accuracy and position adjustment accuracy of the rotary joint.

[0078] In some optional embodiments, the proximal end of the connecting rod is connected with the telescopic control subsystem; the proximal end of the inner tube is connected with the bending control subsystem; the telescopic control subsystem controls the movement of the connecting rod along the axis of the outer tube to adjust the length of the bending control section; and the bending control subsystem adjusts the relative position between the inner tube and the connecting rod to adjust the rotation angle of the rotary joint. As Figure 12 and 13As shown, the proximal end of the outer tube 2002 is fixedly connected to an outer tube mount, which is arranged in the main housing 2006, so the outer tube 2002 is not adjustable. The proximal end of the connecting rod is connected to the telescopic control subsystem, specifically to the telescopic housing 2014, which can be controlled to move along the axis of the outer tube. Since the distal end of the connecting rod and the distal end of the inner tube are both connected to the rotary joint, when the connecting rod is adjusted to move along the axis of the outer tube, the rotary joint and the inner tube move following the movement of the connecting rod. The proximal end of the inner tube is connected to the bend control subsystem, specifically to the bend control slider 2013. The telescopic control subsystem controls the connecting rod to move along the axis of the outer tube to adjust the length of the bend control section, so that the distal end of the bend control section reaches the target position. The bend control subsystem adjusts the relative position between the inner tube and the connecting rod to adjust the rotation angle of the rotary joint. Specifically, when the bend control section is adjusted to the right position, the distal end of the connecting rod will be fixed, at this time, by adjusting the movement of the bend control slider 2013 to drive the movement of the inner tube, the relative displacement between the inner tube and the connecting rod can be changed. As shown, when the bend control slider moves distally along the axis of the outer tube, the distal end of the inner tube is fixed relative to the rotary joint, and the inner tube is squeezed, the part of the distal end of the inner tube located in the bend control section under the constraint of the outer tube will be bulged (i.e. the part of the inner tube located outside the outer tube is bent and deformed), thereby driving the rotary joint to rotate around the distal end connecting point of the connecting rod and point to the target position. By adjusting the movement amount of the inner tube, the angle of the rotary joint can be adjusted. Therefore, by accurately controlling the position of the bend control slider, the rotation angle of the rotary joint can be accurately controlled, so that the anchoring position and the anchoring angle of the anchoring device can be accurately controlled. Figure 12

[0079] In some optional embodiments, the telescopic control subsystem includes a telescopic knob and a telescopic housing, the telescopic knob and the telescopic housing are threadedly connected; the proximal end of the connecting rod is connected to the telescopic housing. As shown, Figure 13 ​As shown, the proximal end of the anchor system's telescopic control subsystem includes a telescopic knob 2007 and a telescopic housing 2014. The telescopic housing 2014 is disposed in the main housing 2006, and the telescopic knob 2007 is sleeved on the outside of the main housing. The telescopic knob and the telescopic housing are threadedly connected. When the telescopic knob is rotated, the telescopic knob will rotate relative to the main housing, and under the threaded transmission, the telescopic housing will move along the axis direction of the outer tube relative to the main housing. Since the proximal end of the connecting rod is connected with the telescopic housing, when the telescopic knob is rotated, the connecting rod will move with the telescopic housing; thereby changing the extension length of the control bending section. Since the displacement caused by the screwing of the thread is small, the precise adjustment of the length of the control bending section can be realized by setting a suitable pitch.

[0080] In some optional embodiments, the control bending control subsystem includes a control bending knob and a control bending slider, and the control bending knob and the control bending slider are threadedly connected; the proximal end of the inner tube is connected with the control bending slider. As shown, Figure 13 As shown, the control bending control subsystem includes a control bending knob 2008 and a control bending slider 2013, and the control bending knob and the control bending slider are threadedly connected. The control bending knob is sleeved on the proximal end of the telescopic housing, and the control bending slider slides along the first guide groove on the telescopic housing. When the control bending knob is rotated, the control slider will move along the telescopic housing. Since the proximal end of the inner tube is connected with the control bending slider, when the control bending slider moves, it will guide the inner tube to move along the axis direction of the outer tube, and finally cause the part of the inner tube located in the control bending section to be raised and guide the rotary joint to rotate. Since the displacement caused by the screwing of the thread is small, the precise adjustment of the rotation angle of the rotary joint can be realized by the above-mentioned threaded matching relationship.

[0081] In some optional embodiments, the telescopic housing is provided with a first guide groove 2015, and the control bending slider is provided with a first guide protrusion 2016, and the first guide protrusion and the first guide groove are slidingly matched to enable the control bending slider to only move in translation. As shown, Figure 13 As shown, the first guide protrusion and the first guide groove can be respectively provided with two groups to improve the movement stability of the control bending slider. Preferably, a threaded part is arranged on the outer wall surface of the first guide protrusion 2016 to cooperate with the control bending knob.

[0082] In some optional embodiments, as shown, Figure 8 and 13As shown, the main housing is provided with a second guide slot 2017, the telescopic housing is provided with a second guide protrusion 2012, the telescopic housing is arranged in the main housing, and the second guide protrusion protrudes out of the second guide slot 2017 and is in sliding fit with the second guide slot, so that the telescopic housing only moves in translation. Preferably, the second guide protrusion and the second guide slot can be provided with two groups respectively to improve the movement stability of the telescopic housing. Preferably, the outer wall surface of the second guide protrusion is provided with a threaded portion to cooperate with the telescopic knob.

[0083] In some optional embodiments, an outer tube mounting seat 2201 is further included, which is arranged in the main housing and connected with the proximal end of the outer tube 2002. The outer tube mounting seat 2201 is fixedly arranged in the main housing. The distal end of the main housing is provided with a front end cover 2005 to close the distal end of the main housing.

[0084] In some optional embodiments, as shown in FIG. 1, the main housing is provided with a first guide slot 2016, and the telescopic housing is provided with a first guide protrusion 2011. The telescopic housing is arranged in the main housing, and the first guide protrusion protrudes out of the first guide slot 2016 and is in sliding fit with the first guide slot, so that the telescopic housing only moves in translation. Figures 14 to 21 In the embodiments, the anchoring unit includes an anchoring part 3001 and an anchoring base 3008, which are non-detachably connected, such as by welding connection. The anchoring part is used to anchor the first target and the second target. The anchoring part is preferably in a spiral anchoring form. During rotation along a first direction, the spiral anchoring form can force the anchored parts to move close to the proximal end of the anchoring part, and during rotation along a second direction opposite to the first direction, the spiral anchoring form can force the anchored parts to move away from the proximal end of the anchoring part. Therefore, when the anchoring part is continuously rotated in the first direction, the multiple target parts anchored will be synchronously moved to the proximal end. When continuously rotated in the second direction, the anchoring relationship between the anchoring part and the target parts can be released, so that the operator can start anchoring again. The side of the anchoring base facing the anchoring part is used to limit the movement of the first target and the second target relative to the anchoring base during anchoring, but does not limit the rotation of the anchoring part relative to the first target and the second target to reduce the gap between the first target and the second target. Under the limiting action of the anchoring base, the first target and the second target reaching the proximal end limit position of the anchoring part will be limited by the anchoring base and will not move with the rotation of the anchoring part. That is, through the limiting action of the anchoring base, the first target and the second target move with the rotation of the anchoring part and finally reach the proximal end of the anchoring part and are limited, so that the first target and the second target are close to each other or even adhere to each other, so as to reduce or eliminate the problems of internal leakage and stent displacement. Further, a connecting system is further included, which is detachably connected with the anchoring base of the anchoring unit and drives the rotation of the anchoring part in the connected state. Figure 15As shown, the connecting system can include buckle 3005, guide sleeve 3004, outer sleeve joint 3003, outer sleeve 3002, and the like. The system composed of the above-mentioned devices can be detached from the anchoring base. When the two are connected, the operator can drive the anchoring part to rotate at the proximal end, thereby anchoring the target part or unanchoring the target part. After completing the anchoring, the operator can control the connecting system to act at the proximal end to detach from the anchoring base, thereby leaving the anchoring part and the anchoring base at the target position, so that the first target and the second target are permanently anchored by the anchoring part. As can be seen, the operator only needs to drive the anchoring part to rotate in one direction through the connecting system to realize the approach of the first target and the second target and reduce or even eliminate the gap therebetween, greatly reducing the operation difficulty of the application.

[0085] In some optional embodiments, referring to Figures 17 to 19 , the anchoring base is provided with a first locking part 4101 away from the anchoring part. In some embodiments, the first locking part 4101 can be a groove provided at the distal end of the anchoring base. As Figure 21 shown, the connecting system includes a buckle 3005, and the buckle is provided with a second locking part 4102. In some embodiments, the second locking part can be a protrusion, which cooperates with the groove to complete the locking, and when the cooperation is separated, the unlocking is completed. Preferably, when the first locking part cooperates with the second locking part, the anchoring unit is locked with the connecting system; when the first locking part is separated from the second locking part, the anchoring unit is unlocked from the connecting system.

[0086] In some optional embodiments, the buckle includes a guide part 3015, which guides the locking of the first locking part and the second locking part. As Figure 18 shown, the guide part 3015 is a guide surface, and the guide surface is inclined to the rotation axis of the anchoring part. During the locking connection, the first locking part 4101 slides along the guide surface and pushes the second locking part to be elastically expanded and clamped into the first locking part.

[0087] In some optional embodiments, the buckle includes a stop part 3018, which abuts against the first locking part in a non-unlocking state to prevent the first locking part and the second locking part from being separated. As Figure 18As shown, the stop portion 3018 is a plane on the proximal end surface of the second locking portion. The proximal end of the groove of the first locking portion is provided with a corresponding plane. The stop portion abuts against the plane of the first locking portion to prevent the anchor base from moving distally to disengage from the connection system. Thus, the buckle stop portion of the present application avoids the problem of separation of the anchor portion from the connection system under abnormal external force, and improves the safety and applicability of the instrument at low cost.

[0088] As shown in some optional embodiments, Figure 17 and 18 As shown, the anchor device further comprises a dissociation wire 3010, and the distal end of the dissociation wire comprises an unlocking portion 3009. Preferably, the unlocking portion 3009 is a ball head provided on the distal end of the dissociation wire. The outer diameter of the ball head is greater than the diameter of the dissociation wire. The buckle comprises a first elastic arm 3016 and a second elastic arm 3017, and the second locking portion is provided on the distal end of the first elastic arm and the second elastic arm, as shown in Figure 17 The first elastic arm and the second elastic arm are in the form of cantilever beams, and the second locking portion is provided on the free end of the first elastic arm and the second elastic arm, so that the second locking portion can be deformed under external force and restored after the external force is removed. In the locked state, the first elastic arm and the second elastic arm are located at the first position to make the first locking portion and the second locking portion locked; in the unlocked state, the unlocking portion pushes the first elastic arm and the second elastic arm to the second position to make the first locking portion and the second locking portion separated. Preferably, the inner side of the first elastic arm and the second elastic arm is provided with a tapered surface with a gradually reduced inner diameter towards the proximal end. In the unlocked state, the unlocking portion is pulled proximally by the dissociation wire, the diameter of the unlocking portion is larger, and cooperates with the tapered surface to press the first elastic arm and the second elastic arm away from each other, so that the first locking portion and the second locking portion are separated. Thus, the present application controls the movement of the dissociation wire to adjust the relative position of the unlocking portion and the first elastic arm and the second elastic arm, so that the relative position between the first elastic arm and the second elastic arm is controllable, and the locking and unlocking between the first locking portion and the second locking portion are conveniently and efficiently controlled, greatly reducing the learning cost and operation difficulty of the operator.

[0089] As shown in some optional embodiments, Figure 15 ( Figure 15 is Figure 14As shown in the enlarged view of the distal end 5000 of the anchoring device and shown in FIG. 17, the connecting system comprises a guide sleeve 3004 which is detachably connected with the anchoring base of the anchoring unit; the guide sleeve comprises a first connecting portion, and the anchoring base is embedded in the first connecting portion, so that the connecting system drives the anchoring unit to rotate. The first connecting portion can be a groove portion, and the two sides of the groove portion are flat surfaces. Correspondingly, the part of the anchoring base connected with the connecting system comprises a protrusion, and the side surface of the protrusion is also a flat surface. Thus, in the assembled state, after the groove portion and the protrusion are matched, the flat surfaces are in contact, so that the torque is transmitted through the flat surfaces to drive the anchoring base to rotate.

[0090] As shown in FIG. 16, Figure 2 and Figure 13 As shown in FIG. 16, the anchoring system further comprises a locking mechanism 1006 which is arranged at the proximal end of the adjustable bending control system to fix the anchoring device at the proximal end of the adjustable bending control system. Preferably, the locking mechanism is a locking screw which is arranged on the rear end cover 2009 at the proximal end of the anchoring system. The rear end cover 2009 is provided with a through hole to allow the anchoring device to pass through, and the locking screw is assembled on the rear end cover perpendicular to the axis of the rear end cover. When the anchoring device is assembled on the rear end cover, the locking screw is screwed into the rear end cover and presses the anchoring device to fix the anchoring device. After the length adjustment of the bending control section and the rotation angle adjustment of the rotary joint are completed, the locking mechanism can be released, and then the anchoring device works to anchor the target.

[0091] Optionally, in some embodiments, the connecting system further comprises an outer sleeve joint 3003, and the distal end of the outer sleeve joint is provided with a plug-in portion. The outer sleeve joint is sleeved on the dissociation wire, and the plug-in portion is embedded in the first connecting portion to hold the buckle between the guide sleeve and the outer sleeve joint. The buckle is fixed by the guide sleeve and the outer sleeve joint.

[0092] As shown in FIG. 16, Figure 21 As shown in FIG. 16, the connecting system further comprises an outer sleeve 3002, and the dissociation wire 3010 is at least partially arranged inside the outer sleeve. The distal end of the outer sleeve is connected with the outer sleeve joint 3003 to drive the anchoring base to rotate through the outer sleeve.

[0093] As shown in FIG. 16, Figure 16Also shown, the anchor device further includes a safety cap 3006 disposed at the proximal end of the anchor device to constrain movement of the disengagement wire. The anchor device further includes a disengagement button 3007 connected to the proximal end of the disengagement wire, and the safety cap constrains proximal movement of the disengagement button, thereby constraining movement of the disengagement wire. When the anchoring of the anchor device is completed, the safety cap can be removed, and the disengagement wire is then pulled proximally by the disengagement button to disengage the connection system from the anchor base.

[0094] The specific embodiments described above are illustrative of specific ways to make and use the application. Other embodiments will be obvious to those of ordinary skill in the art and the general principles defined herein can be applied to other embodiments. The present disclosure is not intended to be limited to the embodiments described above, but rather is to be accorded the full scope that resides in the art and scope of the following claims, and any equivalents thereof. All changes and variations that fall within the scope of the present disclosure are intended to be embraced by the claimed application.

[0095] It is to be understood that the application is not limited to the specific structures described above and illustrated in the drawings, and that various modifications and changes can be made without departing from the scope of the present application. The scope of the application should be determined by the following claims.

Claims

1. An adjustable bending sheath control system, comprising: The adjustable bending sheath comprises an inner tube unit and an outer tube; the inner tube unit comprises an inner tube; The inner tube unit is arranged inside the outer tube, and a distal end of the inner tube unit partially extends out of the outer tube to form a bending control section; A telescopic control subsystem is connected with the inner tube unit and controls movement of the inner tube unit relative to an axis of the outer tube to adjust an extension length of the bending control section relative to the outer tube; A bending control subsystem is connected with the inner tube unit and controls rotational movement of the distal end of the inner tube unit after the length of the bending control section is adjusted to a target length, wherein a rotation axis of the rotational movement is perpendicular to the axis of the outer tube; The bending control subsystem comprises a bending knob and a bending slider, and the bending knob and the bending slider are threadedly connected; A proximal end of the inner tube is connected with the bending slider; The inner tube unit further comprises a rotary joint and a connecting rod; A distal end of the inner tube and a distal end of the connecting rod are both connected with the rotary joint, and the rotary joint is rotatable relative to the distal end of the connecting rod; The distal end of the inner tube and the distal end of the connecting rod at least partially extend out of a distal end of the outer tube to form the bending control section; A proximal end of the connecting rod is connected with the telescopic control subsystem; A proximal end of the inner tube is connected with the bending control subsystem; The telescopic control subsystem controls movement of the connecting rod along the axis of the outer tube to adjust the length of the bending control section; The bending control subsystem adjusts a relative position between the inner tube and the connecting rod to adjust a rotation angle of the rotary joint.

2. The adjustable bending sheath control system according to claim 1, wherein The telescopic control subsystem comprises a telescopic knob and a telescopic housing, and the telescopic knob and the telescopic housing are threadedly connected; A proximal end of the connecting rod is connected with the telescopic housing.

3. The adjustable bending sheath control system according to claim 2, wherein The telescopic housing is provided with a first guide groove, the bending slider is provided with a first guide protrusion, and the first guide protrusion and the first guide groove are in sliding fit to enable only translational movement of the bending slider.

4. The adjustable bending sheath control system according to claim 3, further comprising a main housing, wherein the main housing is provided with a second guide groove, the telescopic housing is provided with a second guide protrusion, the telescopic housing is arranged inside the main housing, and the second guide protrusion and the second guide groove are in sliding fit to enable only translational movement of the telescopic housing.

5. The adjustable bending sheath control system according to claim 4, further comprising an outer tube mounting seat, wherein the outer tube mounting seat is arranged inside the main housing and connected with a proximal end of the outer tube.

6. The adjustable bending sheath control system according to claim 5, wherein the telescopic knob is sleeved outside the main housing and rotatable relative to the main housing.

7. The adjustable bending sheath control system according to claim 2, wherein ​ ​ ​ ​ The bending control knob is sleeved outside the telescopic shell and can rotate relative to the telescopic shell.

8. An anchoring system comprising the adjustable bending sheath control system of any one of claims 1-7, wherein: comprises: an anchoring device, which is sleeved in the inner tube unit and has a distal end in the bending control section; the anchoring unit of the anchoring device comprises an anchoring part, which anchors the first target and the second target and reduces the gap between the first target and the second target after the distal end of the inner tube unit is rotated to the target angle.

9. The anchoring system of claim 8, wherein: the anchoring unit further comprises an anchoring base, which is used to limit the movement of the first target and the second target relative to the anchoring base during anchoring, but does not limit the rotation of the anchoring part relative to the first target and the second target to reduce the gap between the first target and the second target; the anchoring unit further comprises a connecting system, which is detachably connected with the anchoring base of the anchoring unit and drives the rotation of the anchoring part in the connected state.

10. The anchoring system of claim 9, wherein: the side of the anchoring base away from the anchoring part is provided with a first locking part; the connecting system comprises a buckle, which is provided with a second locking part; when the first locking part and the second locking part are connected, the anchoring unit and the connecting system are locked; when the first locking part and the second locking part are separated, the anchoring unit and the connecting system are unlocked.

11. The anchoring system of claim 10, wherein: the anchoring device further comprises a dissociation wire, and the distal end of the dissociation wire comprises an unlocking part; the buckle comprises a first elastic arm and a second elastic arm, and the second locking part is arranged on the first elastic arm and the second elastic arm, respectively; in the locked state, the first elastic arm and the second elastic arm are located at a first position to lock the first locking part and the second locking part; when unlocking, the unlocking part pushes the first elastic arm and the second elastic arm to a second position to separate the first locking part and the second locking part.

12. The anchoring system of claim 11, wherein: the connecting system comprises a guide sleeve, which is detachably connected with the anchoring base of the anchoring unit; the guide sleeve comprises a first connecting part, and the anchoring base is embedded in the first connecting part, so that the connecting system drives the rotation of the anchoring unit.

13. The anchoring system of claim 12, wherein: the anchoring system further comprises a locking mechanism, which is arranged at the proximal end of the adjustable bending control system to fix the anchoring device at the proximal end of the adjustable bending control system.

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