Handle structure

Abstract

The utility model discloses a handle structure, which relates to the technical field of medical instruments and comprises a shell and a push block. The shell is used for supporting the push block, the push block can move longitudinally, and the push block is used for being fixedly connected with a to-be-moved assembly; the handle structure further comprises a relative maximum stroke identification assembly. The relative maximum stroke identification assembly comprises a fixed identification, an indication identification and a longitudinal limiting element. The fixed mark is arranged on the outer side wall surface of the shell; the indication identifier can move relative to the fixed identifier; the indication mark can indicate the relative maximum stroke of the to-be-moved assembly; the longitudinal limiting element can prevent the to-be-moved assembly from exceeding the relative maximum stroke; the indication mark can be linked with the longitudinal limiting element; the to-be-moved assembly can move back and forth between the relative maximum stroke and the minimum stroke through the push block. The utility model provides a handle structure which enables the relative maximum stroke of an assembly to be moved to be adjustable.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a handle structure. Background Art

[0002] With the continuous development of intravascular reconstruction surgery, the application of covered stents is also increasing. However, the use of covered stents in some special parts will affect the blood supply of arterial branch vessels, such as the aortic arch, celiac trunk, bilateral renal arteries and superior mesenteric artery, which greatly limits the use of covered stents in these parts. At present, stent surgery in the above parts can only be performed through improvements in surgical procedures, such as hybrid surgery, or through improvements in instruments, such as modular stents, pre-fenestrated stents, branch stents, multi-layer bare stents and other new instrument technologies. However, for the vast majority of cases, the anatomical structure of the lesion location of the aortic arch is extremely complex, and there are obvious individual differences. The above technical solutions are strongly dependent on the anatomical structure of the human branch vessels, which brings huge challenges to the standardization and commercialization of their products.

[0003] In situ fenestration of stent grafts is a more advanced technology, which includes two categories: energy fenestration and mechanical fenestration. Energy fenestration uses energy such as laser, radio frequency and thermocouple to perform fenestration operations, that is, the energy is used to ablate the stent graft to produce the expected holes. However, this method has high requirements for equipment. If the energy is too high, the stent coating will be carbonized and its decomposition products may cause thrombosis. If the energy is insufficient, the expected fenestration effect cannot be achieved. At the same time, energy can not only ablate the stent coating, but also cause damage to surrounding tissues. Therefore, mechanical fenestration has become a relatively conservative but safer fenestration method.

[0004] In the prior art, when a mechanical stent is used to open a window in situ, the movement of the puncture needle is driven by a handle structure. When the existing handle structure drives the puncture needle for puncture, the adjustment range is fixed, that is, the maximum puncture depth of the puncture needle is fixed. The maximum puncture depth of the puncture needle cannot be adjusted according to needs, which may easily cause the puncture depth to be too large and accidentally injure the opposite tissue, or the puncture depth to be insufficient and cause unsuccessful puncture. Utility Model Content

[0005] The utility model aims to provide a handle structure to solve the problems existing in the prior art and to enable the relative maximum stroke of the components to be moved to be adjustable.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a handle structure, comprising a shell and a push block; the shell is used to support the push block, the push block can move longitudinally, and the push block is used to be fixedly connected to a component to be moved; the handle structure also includes a relative maximum stroke identification component, the relative maximum stroke identification component includes a fixed mark, an indication mark and a longitudinal limiting element; the fixed mark is arranged on the outer wall surface of the shell; the indication mark can move relative to the fixed mark; the indication mark can indicate the relative maximum stroke of the component to be moved; the longitudinal limiting element can prevent the component to be moved from exceeding the relative maximum stroke; the indication mark can be linked with the longitudinal limiting element; the component to be moved can be moved back and forth between the relative maximum stroke and the minimum stroke through the push block.

[0008] Preferably, the handle structure has a first state and a second state; in the first state, the relative maximum stroke of the component to be moved coincides with the minimum stroke, and the component to be moved is locked; in the second state, the relative maximum stroke of the component to be moved is greater than the minimum stroke, and the component to be moved is unlocked.

[0009] Preferably, the indication mark and the longitudinal limiting element are connected via gears or cables or are two parts of an integral whole.

[0010] Preferably, the component to be moved includes a supporting tube; the proximal section of the supporting tube is fixedly connected to the push block; the proximal section of the supporting tube is provided with a first limiting portion; the longitudinal limiting element is provided with a second limiting portion; the second limiting portion prevents the component to be moved from exceeding the relative maximum stroke by blocking the longitudinal displacement of the first limiting portion.

[0011] Preferably, the shell is provided with a slit portion which penetrates the shell wall and extends longitudinally along the handle structure; a part of the push block passes through the slit portion into the interior of the handle structure and is fixedly connected to the support tube; the shell near the proximal end of the slit portion has a third limiting portion which can prevent the push block from moving longitudinally toward the proximal end of the handle structure.

[0012] Preferably, the longitudinal limiting element is a cylindrical knob; the proximal section of the cylindrical knob is provided with a knob portion; the distal section of the cylindrical knob is provided with a threaded guide portion; the threaded guide portion has a proximal end and a distal end; the cylindrical knob has a hollow cavity that passes through the two end surfaces of the cylindrical knob; a second limiting portion is provided in the hollow cavity and close to the proximal end of the threaded guide portion; the proximal end of the threaded guide portion is provided with the indication mark; the supporting tube can be longitudinally movably arranged in the hollow cavity of the cylindrical knob; the first limiting portion of the supporting tube is arranged near the proximal end of the cylindrical knob; the threaded guide portion movably cooperates with the knob limiting member inside the handle structure, the knob portion is arranged outside the handle structure, and the cylindrical knob passes through the proximal end of the outer shell.

[0013] Preferably, it also includes a locking assembly for locking the longitudinal limiting element.

[0014] Preferably, the locking assembly includes a first clutch portion arranged on the first limiting portion and a second clutch portion arranged on the second limiting portion; the first limiting portion is fixedly connected to the support tube; the first clutch portion and the second clutch portion are arranged opposite to each other; the contact cooperation between the first clutch portion and the second clutch portion can lock the longitudinal position of the longitudinal limiting element relative to the handle structure.

[0015] Preferably, the push block is connected to a plunger ball head, and the plunger ball head is in rolling contact with an inner wall of the housing.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The handle structure of the utility model adjusts the relative maximum stroke of the component to be moved through the longitudinal limiting element, the fixed mark can indicate the adjustment range of the relative maximum stroke, the indicating mark is linked with the longitudinal limiting element, the indicating mark indicates the relative maximum stroke after adjustment by the longitudinal limiting element, thereby realizing the adjustable relative maximum stroke of the component to be moved, the push block drives the component to be moved back and forth between the relative maximum stroke and the minimum stroke, thereby realizing the forward and backward movement of the component to be moved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is an axonometric diagram of the handle structure of the utility model applied to a membrane rupture device of a coated stent;

[0020] Figure 2 This is a front view of the handle structure of the utility model applied to the membrane rupture device of the coated stent;

[0021] Figure 3 for Figure 2 AA section view;

[0022] Figure 4 It is a schematic diagram of the push block, support tube and Luer connector of the utility model;

[0023] Figure 5 This is an external schematic diagram of the longitudinal limiting element of the utility model;

[0024] Figure 6 This is a schematic diagram of the interior of the longitudinal limiting element of the utility model;

[0025] Figure 7 This is an external schematic diagram of the handle structure of the utility model (without a push block);

[0026] Figure 8 This is a schematic diagram of the internal structure of the handle of the utility model;

[0027] Fig. 9 It is a schematic diagram of a push block with a plunger ball head, a longitudinal limiting element and a supporting tube of the utility model;

[0028] Fig.10 This is a cross-sectional view of the handle of the utility model;

[0029] Fig.11 It is a schematic diagram of a push block with a plunger ball head of the utility model;

[0030] Fig.12 It is a schematic diagram of the plunger ball head of the utility model;

[0031] Fig.13 This is a front view of the puncture needle assembly and the membrane expansion balloon of the utility model;

[0032] Fig.14 It is a top view of the puncture needle assembly and the membrane expansion balloon of the utility model;

[0033] Fig.15 It is a cross-sectional view of the puncture needle assembly and the membrane expansion balloon of the utility model;

[0034] Fig.16 for Fig.11 A partial enlarged view of location Ⅰ;

[0035] Fig.17 for Fig.11 A partial enlarged view of location II;

[0036] In the figure: 1-handle structure, 2-puncture needle assembly, 3-push block, 4-housing, 5-relative maximum stroke identification assembly, 6-puncture needle, 7-support tube, 8-fixed identification, 9-indicator identification, 10-Rule connector, 11-longitudinal limiting element, 12-knob limiting member, 13-first limiting portion, 14-second limiting portion, 15-slit portion, 16-first clutch portion, 17-knob portion, 18-threaded guide portion, 19-hollow cavity, 20-second clutch portion, 21-third limiting portion, 22-polymer lubricating layer, 23-expanded balloon, 24-fluid channel, 25-plunger ball head. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] The utility model aims to provide a handle structure to solve the problems existing in the prior art and to enable the relative maximum stroke of the components to be moved to be adjustable.

[0039] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] Embodiment 1

[0041] like Figures 1 to 8As shown, this embodiment provides a handle structure 1, which can be applied to a membrane rupture device for a coated stent, including a shell 4 and a push block 3, the shell 4 is used to support the push block 3, the push block 3 can move longitudinally, and the push block 3 is used to be fixedly connected to the component to be moved (i.e., the puncture needle assembly 2); the puncture needle assembly 2 includes a puncture needle 6 (used to puncture a hole / window on the coated stent) and a slender support tube 7 fixedly connected to the puncture needle 6; the proximal section of the support tube 7 is fixedly connected to the push block 3; the proximal section of the support tube 7 is provided with a first limit portion 13; the handle structure 1 also includes a relative maximum stroke marking assembly 5 (used to adjust / flexibly set the puncture needle 6 relative to the handle structure 1 / The maximum moving stroke of the membrane expansion balloon 23, that is, the maximum moving stroke of the puncture needle 6 can have multiple (0-25mm in the figure), and the actual maximum moving stroke needs to be adjusted / set according to the specific surgical situation); the relative maximum stroke identification component 5 includes a fixed mark 8 (0-25mm in the figure), an indicating mark 9 (a cursor or pointer coated with a striking color, used to indicate the current relative maximum stroke mark of the puncture needle 6) and a longitudinal limiting element 11 (used to prevent the puncture needle 6 from exceeding the relative maximum stroke); the fixed mark 8 is set on the outer wall of the shell 4; the indicating mark 9 can move relative to the fixed mark 8; the longitudinal limiting element 11 1 is a columnar knob; the columnar knob passes through the housing 4 at the proximal end of the handle structure 1; the proximal section of the columnar knob is provided with a knob portion 17, and the knob portion 17 is arranged outside the handle structure 1; the distal section of the columnar knob is provided with a threaded guide portion 18; the threaded guide portion 18 has a proximal end and a distal end; the columnar knob has a hollow cavity 19 that passes through both end surfaces of the columnar knob; the support tube 7 can be longitudinally movably arranged in the hollow cavity 19 of the columnar knob; the first limiting portion 13 of the support tube 7 is arranged near the proximal end of the columnar knob; a second limiting portion 14 is provided in the hollow cavity 19 and near the proximal end of the threaded guide portion 18, and the second limiting portion 14 blocks the first limiting portion 13 from moving. A longitudinal displacement of a limit portion 13 is used to prevent the puncture needle 6 from exceeding the relative maximum stroke; an indication mark 9 is provided at the proximal end of the threaded guide portion 18; the threaded guide portion 18 is movably matched with the knob limiter 12 inside the handle structure 1; the shell 4 is provided with a slit portion 15 that penetrates the wall of the shell 4 and extends longitudinally along the handle structure 1; a part of the push block 3 passes through the slit portion 15 to enter the handle structure 1 and is fixedly connected to the support tube 7; the shell 4 near the proximal end of the slit portion 15 has a third limit portion 21 that can block the push block 3 from moving longitudinally toward the proximal end of the handle structure 1; the push block 3 can enable the puncture needle 6 to move back and forth between the relative maximum stroke and the minimum stroke.

[0042] The present embodiment further includes a locking assembly for locking the longitudinal limiting element 11, the locking assembly including a first clutch portion 16 arranged on the first limiting portion 13 and a second clutch portion 20 arranged on the second limiting portion 14; the first limiting portion 13 is fixedly connected to the support tube 7; the first clutch portion 16 and the second clutch portion 20 are arranged facing each other; the contact and cooperation between the first clutch portion 16 and the second clutch portion 20 can lock the longitudinal position of the longitudinal limiting element 11 relative to the handle structure 1 (the support tube 7 is fixedly connected to the first limiting portion 13, the support tube 7 is fixedly connected to the push block 3, and the push block 3 is fixedly connected to the push block 3). Block 3 is restricted by the housing 4, so the first limit portion 13 cannot rotate circumferentially, while the cylindrical knob is advanced or retreated by rotation; the contact and cooperation between the first clutch portion 16 and the second clutch portion 20 enables the cylindrical knob to be coupled with the first limit portion 13, thereby preventing the cylindrical knob from further rotating and advancing, that is, the first clutch portion 16 and the second clutch portion 20 limit the circumferential relative movement of the first limit portion 13 and the second limit portion 14, thereby limiting the axial relative movement of the first limit portion 13 and the second limit portion 14).

[0043] This embodiment enables the coated stent rupture device to have a first state and a second state; in the first state, the relative maximum stroke of the puncture needle 6 coincides with the minimum stroke (that is, the indicator mark 9 in the figure stops at the position of 0 mm), and the puncture needle 6 is locked (the first clutch part 16 and the second clutch part 20 are in contact and cooperation); in the second state, the relative maximum stroke of the puncture needle 6 is greater than the minimum stroke, and the puncture needle 6 is unlocked (the first clutch part 16 and the second clutch part 20 are separated).

[0044] Embodiment 2

[0045] like Figures 9 to 12 As shown, further improvement: the push block 3 is added with a plunger ball head 25. The internal component (support tube 7) contacts with the handle structure 1 by means of the plunger ball head 25, and the plunger ball head 25 can roll relative to the inner wall of the handle structure 1. The plunger ball head 25 can reduce the resistance of the internal component inside the handle structure 1, thereby improving the hand feeling when removing the needle (because when the needle is breaking the membrane, the resistance feedback of the membrane breaking is very important to the doctor).

[0046] Embodiment 3

[0047] In order to realize the integration of the puncture needle assembly 2 and the membrane expansion balloon 23, as shown in FIG. Figures 13 to 17As shown, this embodiment provides a stent graft membrane rupture device, and discloses a puncture needle assembly 2: the support tube 7 includes a hypotube metal tube body, and the inner surface and outer surface of the support tube 7 are respectively fixedly connected with a polymer lubricating layer 22; a fluid channel 24 is provided between the two layers of polymer lubricating layers 22; a membrane expansion balloon 23 is fixedly connected to one end of the metal needle tip close to the puncture needle 6; the membrane expansion balloon 23 is connected to the fluid channel 24. After the needle with a guide wire punctures the stent graft, the stent graft can be expanded along the guide wire using the membrane expansion balloon 23 on the puncture needle without withdrawing the puncture needle.

[0048] like Figures 1 to 8 As shown, the membrane rupture device handle structure 1; the handle structure 1 housing 4 is provided with a push block 3 that can move longitudinally, and the push block 3 is fixedly connected to the puncture needle assembly 2; the proximal end of the puncture needle assembly 2 is coaxially sleeved with the longitudinal limiting element 11, and is fixedly connected to the Luer connector 10; the longitudinal limiting element 11 has a threaded guide rail; the knob limiting member 12 that movably cooperates with the longitudinal limiting element 11 is fixed to the end of the handle structure 1 housing 4. The longitudinal limiting element 11 can adjust the relative position with the handle structure 1 through the threaded cooperation with the knob limiting member 12, thereby limiting the movable distance of the Luer connector 10 and limiting the needle withdrawal length of the membrane rupture needle.

[0049] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A handle structure, comprising a housing and a push block; the housing is used to support the push block, the push block can move longitudinally, and the push block is used to be fixedly connected to a component to be moved; characterized in that: The handle structure also includes a relative maximum stroke identification component, which includes a fixed identification component, an indicating identification component and a longitudinal limiting element; the fixed identification component is arranged on the outer wall surface of the shell; the indicating identification component can move relative to the fixed identification component; the indicating identification component can indicate the relative maximum stroke of the component to be moved; the longitudinal limiting element can prevent the component to be moved from exceeding the relative maximum stroke; the indicating identification component can be linked with the longitudinal limiting element; and the push block can enable the component to be moved back and forth between the relative maximum stroke and the minimum stroke.

2. The handle structure according to claim 1, characterized in that: The handle structure has a first state and a second state; in the first state, the relative maximum stroke and minimum stroke of the component to be moved coincide with each other, and the component to be moved is locked; In the second state, the relative maximum stroke of the component to be moved is greater than the minimum stroke, and the component to be moved is unlocked.

3. The handle structure according to claim 1, characterized in that: The indication mark and the longitudinal limiting element are connected via gears or cables or are two parts of an integral whole.

4. The handle structure according to claim 3, characterized in that: The component to be moved includes a supporting tube; the proximal section of the supporting tube is fixedly connected to the pushing block; the proximal section of the supporting tube is provided with a first limiting portion; the longitudinal limiting element is provided with a second limiting portion; the second limiting portion prevents the component to be moved from exceeding the relative maximum stroke by blocking the longitudinal displacement of the first limiting portion.

5. The handle structure according to claim 4, characterized in that: The shell is provided with a slit portion which penetrates the shell wall and extends longitudinally along the handle structure; a portion of the push block passes through the slit portion into the interior of the handle structure and is fixedly connected to the support tube; the shell near the proximal end of the slit portion has a third limiting portion which can prevent the push block from moving longitudinally toward the proximal end of the handle structure.

6. The handle structure according to claim 5, characterized in that: The longitudinal limiting element is a cylindrical knob; the proximal section of the cylindrical knob is provided with a knob portion; the distal section of the cylindrical knob is provided with a threaded guide portion; the threaded guide portion has a proximal end and a distal end; the cylindrical knob has a hollow cavity that passes through the two end surfaces of the cylindrical knob; a second limiting portion is provided in the hollow cavity and close to the proximal end of the threaded guide portion; the proximal end of the threaded guide portion is provided with the indication mark; the supporting tube can be longitudinally movably arranged in the hollow cavity of the cylindrical knob; the first limiting portion of the supporting tube is arranged close to the proximal end of the cylindrical knob; the threaded guide portion movably cooperates with the knob limiting member inside the handle structure, the knob portion is arranged outside the handle structure, and the cylindrical knob passes through the proximal end of the outer shell.

7. The handle structure according to claim 4, characterized in that: Also included is a locking assembly for locking the longitudinal limiting element.

8. The handle structure according to claim 7, characterized in that: The locking assembly includes a first clutch portion arranged on the first limiting portion and a second clutch portion arranged on the second limiting portion; the first limiting portion is fixedly connected to the supporting tube; the first clutch portion and the second clutch portion are arranged opposite to each other; the contact cooperation between the first clutch portion and the second clutch portion can lock the longitudinal position of the longitudinal limiting element relative to the handle structure.

9. The handle structure according to claim 1, characterized in that: The push block is connected to the plunger ball head, and the plunger ball head is in rolling contact with the inner wall of the shell.

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