CN220860145U - High-frequency nipple incision knife with angle zeroing function - Google Patents

Abstract

The utility model discloses a high-frequency nipple cutting knife with an angle zeroing function, which comprises a core bar, a sliding handle, an electrode, a fixed block, a rotary catheter, an outer sheath tube, a shredding, a front end cap, a rotary shaft and a rotating wheel, wherein the fixed block and the rotary catheter are positioned in the core bar, the shredding is arranged in the rotary catheter in a penetrating way and is fixedly connected with the rotary catheter, the rotating wheel is arranged at the far end of the core bar, the far end of the rotary shaft is inserted into a central hole of the rotating wheel and is connected with the rotating wheel, the near end of the rotary shaft is inserted into the core bar and is connected with the rotary catheter in an axially movable circumferential non-rotatable way, the rotating wheel drives the rotary shaft and the rotary catheter to synchronously rotate, a window is formed in the core bar, a gear is arranged at the window of the core bar, a meshing piece is arranged on the rotary shaft, and zero position indication marks are arranged at the windows of the gear and the core bar. In this scheme, when the zero position indicator of gear aligns with the zero position indicator of the window department of core bar promptly is the angle zero position to make things convenient for quick finding back the zero position after rotating the runner during the operation.

Description

High-frequency nipple incision knife with angle zeroing function

Technical Field

The utility model relates to the field of medical appliances, in particular to a high-frequency nipple cutting knife with an angle return function.

Background

With the wide development of endoscopic treatment, endoscopic high-frequency electrotome and electrocoagulation are more popular. The EST is a treatment technology for incising the end parts of the duodenal papilla dilated muscle and common bile duct by using a high-frequency electric incision knife under an endoscope. EST is an important treatment technique in the field of endoscopy and is also a precondition for other endoscopic treatments. For example, diagnosis and treatment techniques such as bile duct stone extraction, bile duct stenosis dilatation, biliary duct stent internal drainage, bile duct tumor biopsy and radioactive source implantation internal irradiation are mostly carried out by firstly carrying out EST and then completing various endoscopic treatments. EST has the advantages of small operation wound, quick postoperative recovery, high success rate and the like, and therefore, the EST is gradually widely applied.

The high-frequency nipple incision knife is an instrument necessary in EST operation, and a doctor repeatedly adjusts the shredding direction left and right through rotating a rotating wheel in the endoscopic operation process, so that the proper cutting angle is adjusted. For example, patent application publication No. CN206473393U discloses a tissue cutting device for endoscope, which avoids cutting breakage due to excessive rotation by providing a limiting mechanism for limiting the number of cutting rotations; patent application publication number 209136855U discloses a controllable high-frequency slitting knife which can be adjusted by the slitting knife itself to change the head position of the slitting knife. However, in the endoscopic operation, the doctor cannot keep in mind that the wheel has rotated several turns to the left or right, so that the original position is returned to, i.e., the zero position, where the position is to be determined by observing the X-ray image, and is not accurate.

Disclosure of utility model

In order to solve the technical problems, the utility model aims to provide the high-frequency nipple cutting knife with the angle zeroing function, which is convenient for doctors to quickly zeroing the head shredding angle at any time in operation, shortens the time for adjusting the cutting angle, reduces the pain of patients and saves the operation time.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model provides a take angle to return to zero's high frequency nipple cutting knife, includes core bar, slip handle, electrode, fixed block, rotatory pipe, outer sheath pipe, filament, front end cap, runner shaft and runner, fixed block and rotatory pipe are located the core bar, the proximal end of filament wears to establish in rotatory pipe and with rotatory pipe fixed connection, the cover is equipped with the slip handle on the core bar, the electrode is fixed to be set up on the slip handle, the one end of electrode stretches into in the core bar and fixed with the fixed block, the proximal end of filament is connected with the mode of rotationally axial non-movable between filament mounting and the fixed block in the circumference, the runner sets up the distal end at the core bar, the distal end of runner shaft inserts in the centre bore of runner and is connected with the runner, the proximal end of runner shaft inserts in the core bar and is connected with rotationally fixed mode in the axially movable circumference between the rotatory pipe, the runner shaft and rotates the synchronous rotation of runner shaft, the front end cap is fixed to be set up the distal end at the core bar, the proximal end of outer sheath pipe and the distal end fixed connection of front end cap, wear to establish in the outer sheath pipe and the distal end of filament and outer sheath pipe are fixed with, the window of the window that has, the window that the window has the window that the window meshes with the core bar, the window is all had, the window is meshed with the position of the core bar. Therefore, when the zero position indication mark of the gear is aligned with the zero position indication mark at the window of the core rod, the zero position indication mark is an angle zero position, so that the zero position can be quickly retrieved after the rotating wheel is rotated during operation.

Preferably, the rotating wheel is embedded on the front end cap, and the rotating wheel shaft penetrates through the inner cavity of the front end cap to be fixedly connected with the rotating wheel.

Preferably, a sealing ring is arranged between the rotating wheel shaft and the inner cavity of the front end cap, and the sealing ring is an O-shaped sealing ring. Through setting up the sealing washer to when the runner axle rotates, friction between the inner chamber of runner axle and front end cap, like this, can not be touched the dislocation easily when rotatory to the assigned position and lead to the filament displacement of distal end, moreover, can also obtain better feel when rotatory runner.

Preferably, the sheath tube is provided with a guide wire connecting cannula, and the guide wire connecting cannula is provided with a guide wire luer connector.

Preferably, the outer sheath tube is provided with an injection connection cannula, and the injection connection cannula is provided with an injection luer connector.

Preferably, the device further comprises a gear central shaft, a pin hole is formed in the proximal end face of the window of the core rod, one end of the gear central shaft is arranged in the pin hole, and the gear is rotatably arranged on the gear central shaft.

Preferably, the distal end of the core rod is provided with an opening communicated with the window, and the front end cap is sleeved at the distal end of the core rod; the front end cap limits the far end of the gear central shaft.

Preferably, a thumb ring is also included, the thumb ring being disposed at the proximal end of the stem.

Preferably, the section of the shaft hole of the rotating wheel shaft is circular, a limiting block used for pressing the rotating guide pipe is arranged between the rotating wheel shaft and the rotating guide pipe, and when the rotating wheel shaft rotates, the limiting block drives the rotating guide pipe to synchronously rotate.

Preferably, the section of the shaft hole of the rotating wheel shaft is non-circular, the shape of the rotating guide pipe is matched with the section of the shaft hole of the rotating wheel shaft, and the rotating guide pipe is limited by the shape of the shaft hole of the rotating wheel shaft.

The utility model has the following beneficial effects due to the adoption of the technical scheme: according to the utility model, the window is formed in the core bar, the gear is arranged at the window, the meshing piece for stirring the gear to rotate is arranged on the rotary catheter, and the zero position indication marks are arranged at the windows of the gear and the core bar, so that when the zero position indication marks of the gear are aligned with the zero position indication marks at the window of the core bar, the zero position indication marks are angle zero positions, thereby facilitating a doctor to quickly find the zero position after rotating the rotating wheel during operation, shortening the time for adjusting the cutting angle, saving the operation time and reducing the pain of a patient.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic view of the core rod;

Fig. 4 is a schematic structural view of a roller shaft in embodiment 1;

FIG. 5 is a schematic view of the structure of the rotor;

FIG. 6 is a schematic view of the structure of the front end cap;

FIG. 7 is a schematic view of the structure of a gear;

FIG. 8 is a schematic view of the structure of the seal ring and stopper mounted on the rotating shaft in embodiment 1;

Fig. 9 is a schematic structural view of a transfer shaft in embodiment 2.

Reference numerals: 1. a thumb ring; 2. a core bar; 2-1, pin holes; 2-2, windows; 3. a sliding handle; 4. an electrode; 5. a fixed block; 6. shredding fixing pieces; 7. rotating the catheter; 8. a guidewire luer fitting; 9. the guide wire is connected with the cannula; 10. an injection luer fitting; 11. injecting a connecting cannula; 13. an outer sheath; 14. shredding; 15. a gear; 16. a gear central shaft; 17. a front end cap; 18. a limiting block; 19. a rotating shaft; 19-1, engagement members; 20. a seal ring; 21. a rotating wheel; 21-1, a central hole.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

For convenience of description, in the present utility model, the end closer to the doctor is the proximal end, and the opposite end is the distal end, when the doctor uses the high-frequency nipple cutting tool.

Example 1

The high-frequency nipple cutting knife with the angle zeroing function comprises a core bar 2, a sliding handle 3, an electrode 4, a fixed block 5, a rotary guide tube 7, an outer sheath tube 13, a cutting wire 14, a front end cap 17, a rotating wheel shaft 19 and a rotating wheel 21, wherein the fixed block 5 and the rotary guide tube 7 are positioned in the core bar 2, the proximal end of the cutting wire 14 is arranged in the rotary guide tube 7 in a penetrating way and is fixedly connected with the rotary guide tube 7, and generally, the cutting wire 14 and the rotary guide tube 7 are in flat connection; the core bar 2 is sleeved with a sliding handle 3, an electrode 4 is fixedly arranged on the sliding handle 3, one end of the electrode 4 extends into the core bar 2 and is in threaded fixation with a fixed block 5, the proximal end of a shredding 14 is connected with the fixed block 5 in a circumferential rotatable axial immovable manner through a shredding fixing piece 6, a rotating wheel 21 is arranged at the distal end of the core bar 2, the distal end of a rotating wheel shaft 19 is inserted into a central hole 21-1 of the rotating wheel 21 and is connected with the rotating wheel 21, the proximal end of the rotating wheel shaft 19 is inserted into the core bar 2 and is connected with a rotating guide tube 7 in an axial movable circumferential immovable manner, the rotating wheel 21 drives a rotating wheel shaft 19 and the rotating guide tube 7 to synchronously rotate, the front end cap 17 is fixedly arranged at the far end of the core rod 2, the near end of the outer sheath tube 13 is fixedly connected with the far end of the front end cap 17, the thread 14 is arranged in the outer sheath tube 13 in a penetrating mode, the far end of the thread 14 is fixed with the far end of the outer sheath tube 13, the core rod 2 is provided with a window 2-2, a gear 15 is arranged at the window 2-2 of the core rod 2, the rotating wheel shaft 19 is provided with a meshing piece 19-1 for meshing with the gear 15, zero position indication marks are arranged at the window 2-2 of the gear 15 and the core rod 2, and in the utility model, the zero position indication marks at the window 2-2 of the gear 15 and the core rod 2 can be color mark symbols or marks formed by grooves, bulges, gaps or arrows.

Thus, when the high-frequency nipple cutting knife is used, when the extending length of the cutting wire 14 needs to be adjusted, the sliding handle 3 is held to move back and forth on the core bar 2, and the electrode 4, the fixed block 5, the cutting wire fixing piece 6 and the cutting wire 14 are driven to move back and forth; when the rotation angle of the shredding 14 needs to be adjusted, the rotating wheel 21 is rotated to drive the rotating wheel shaft 19, the rotating guide pipe 7, the gear 15 and the shredding 14 to synchronously rotate; when the zero position needs to be quickly found, the rotating wheel 21 is rotated to enable the zero position indication mark of the gear 15 to be aligned with the zero position indication mark at the window of the core bar 2, namely, the angle zero position is formed, the zero position finding is quick and convenient, the time for adjusting the cutting angle is shortened, the operation time is saved, and the pain of a patient is reduced.

The engagement member 19-1 may be a single tooth engagement member or a plurality of tooth engagement members, and the engagement member 19-1 and the wheel shaft 19 may be integrally formed or fixed by welding.

Generally, the front end cap 17 and the core rod 2 may be fixedly connected in a snap connection, a threaded connection, or the like, the rotating wheel 21 is embedded on the front end cap 17, and the rotating wheel shaft 19 is connected with the rotating wheel 21 through the inner cavity of the front end cap 17.

A sealing ring 20 is arranged between the rotating wheel shaft 19 and the inner cavity of the front end cap 17, the sealing ring 20 is an O-shaped sealing ring, so that the friction force between the rotating wheel shaft 19 and the inner cavity of the front end cap 17 is increased, when the rotating wheel 21 rotates to a designated position, the rotating wheel 21 cannot be easily touched to lose position, and in addition, the rotating wheel 21 has better hand feeling.

As shown in fig. 1, the outer sheath tube 13 is provided with a guide wire connecting cannula 9, and the guide wire connecting cannula 9 is provided with a guide wire luer joint 8; an injection connection cannula 11 is arranged on the outer sheath tube 13, and an injection luer connector 10 is arranged on the injection connection cannula 11.

As shown in fig. 2, 3 and 7, the device further comprises a gear central shaft 16, a pin hole 2-1 is formed at the proximal end face of the window 2-2 of the core rod 2, in this embodiment, the gear central shaft 16 is fixed, one end of the gear central shaft 16 is disposed in the pin hole 2-1 in an interference fit manner, and the gear 15 is rotatably disposed on the gear central shaft 16.

As shown in fig. 5, the surface of the rotating wheel 21 is provided with a plurality of protrusions with poking edges, the central hole 21-1 of the rotating wheel 21 is non-circular, the shape of one end of the rotating wheel shaft 19 inserted into the central hole 21-1 of the rotating wheel 21 is matched with the shape of the central hole 21-1 of the rotating wheel 21, and the rotating wheel shaft 19 is limited by the shape of the central hole 21-1 of the rotating wheel 21, so that the rotating wheel 21 and the rotating wheel shaft 19 can synchronously rotate.

To facilitate pushing and pulling the sliding handle 3, a doctor can operate the high-frequency nipple cutting knife with one hand during operation, as shown in fig. 1, and the high-frequency nipple cutting knife further comprises a thumb ring 1, wherein the thumb ring 1 is arranged at the proximal end of the core bar 2. The thumb ring 1 is fixedly arranged at the proximal end of the core rod 2 in a clamping, bolting and other modes, and can also be integrally formed at the proximal end of the core rod 2.

In this embodiment 1, as shown in fig. 2, 4 and 8, the shaft hole section of the rotating wheel shaft 19 is circular, a limiting block 18 for pressing the rotating conduit 7 is disposed between the rotating wheel shaft 19 and the rotating conduit 7, and when the rotating wheel shaft 19 rotates, the limiting block 18 drives the rotating conduit 7 to synchronously rotate. The wheel shaft 19 may be formed by machining metal material, plastic material or other materials, and the stopper 18 may be made of POM plastic insulating material or other insulating materials.

Example 2

The difference between this embodiment 2 and embodiment 1 is that the cross-sectional shape of the shaft hole of the rotor shaft 19 is, as shown in fig. 9, the cross-section of the shaft hole of the rotor shaft 19 is non-circular, the shape of the rotary guide tube 7 is adapted to the cross-section of the shaft hole of the rotor shaft 19, and the rotary guide tube 7 is limited by the shape of the shaft hole of the rotor shaft 19, so that the limiting manner is simpler and more direct, and the part of the limiting block 18 is reduced.

Example 3

This embodiment 3 is different from embodiment 1 in that in this embodiment, the distal end of the core rod 2 is provided with an opening communicating with the window 2-2, and the front end cap 17 is sleeved on the distal end of the core rod 2; the front end cap 17 limits the distal end of the gear central shaft 16. Thus, the gear center shaft 16 can be fixedly connected with the gear 15, and the gear center shaft 16 synchronously rotates when the gear 15 rotates.

All features described in the description, the appended claims and the drawings, either alone or in any combination, are important features of the present utility model.

In the description of the present specification, the descriptions of the terms "one embodiment," "some embodiments," "one implementation," "a particular implementation," "other implementations," "examples," "particular examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment, implementation, or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described above may be combined in any suitable manner in any one or more embodiments, implementations, or examples. The technical scheme disclosed by the utility model also comprises the technical scheme that any one or more specific features, structures, materials or characteristics are formed singly or in combination.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, variations, deletions of parts, additions of features, or re-combination of features may be made to the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model, all such simple modifications, equivalents, and adaptations of the embodiments as may be made by the principles of the utility model and without departing from the scope of the utility model.

Claims (10)

1. The utility model provides a high frequency nipple cutting knife with angle zeroing, including core bar (2), sliding handle (3), electrode (4), fixed block (5), rotatory pipe (7), outer sheath pipe (13), filament (14), front end cap (17), runner axle (19) and runner (21), fixed block (5) and rotatory pipe (7) are located core bar (2), the proximal end of filament (14) wears to establish in rotatory pipe (7) and with rotatory pipe (7) fixed connection, the cover is equipped with sliding handle (3) on core bar (2), electrode (4) fixed setting is on sliding handle (3), the one end of electrode (4) stretches into in core bar (2) and is fixed with fixed block (5), the proximal end of filament (14) is through being connected with rotatable axial non-movable mode between filament fixing piece (6) and the fixed block (5), runner (21) set up in the distal end of core bar (2), the distal end of runner axle (19) inserts in the centre bore (21-1) of runner (21) and is connected with rotatable mode and is connected with the adjacent to the runner axle (7) in a rotatable axial non-movable mode, the rotating wheel (21) drives the rotating wheel shaft (19) and the rotating guide tube (7) to synchronously rotate, the front end cap (17) is fixedly arranged at the far end of the core rod (2), the near end of the outer sheath tube (13) is fixedly connected with the far end of the front end cap (17), the shredding (14) is arranged in the outer sheath tube (13) in a penetrating mode, the far end of the shredding (14) is fixed with the far end of the outer sheath tube (13), and the rotating wheel is characterized in that a window (2-2) is formed in the core rod (2), a gear (15) is arranged at the window (2-2) of the core rod (2), a meshing piece (19-1) used for meshing with the gear (15) is arranged on the rotating wheel shaft (19), and zero position indication marks are arranged at the window (2-2) of the gear (15) and the core rod (2).

2. The high-frequency nipple cutting knife with angle zeroing according to claim 1, wherein the rotating wheel (21) is embedded on the front end cap (17), and the rotating wheel shaft (19) penetrates through the inner cavity of the front end cap (17) to be fixedly connected with the rotating wheel (21).

3. The high-frequency nipple cutting knife with angle zeroing according to claim 2, characterized in that a sealing ring (20) is arranged between the rotating wheel shaft (19) and the inner cavity of the front end cap (17), and the sealing ring (20) is an O-shaped sealing ring.

4. The high-frequency nipple cutting knife with the angle zeroing function according to claim 1, wherein a guide wire connecting cannula (9) is arranged on the outer sheath tube (13), and a guide wire luer connector (8) is arranged on the guide wire connecting cannula (9).

5. The high-frequency nipple cutting knife with angle return to zero according to claim 1, wherein an injection connecting cannula (11) is arranged on the outer sheath tube (13), and an injection luer connector (10) is arranged on the injection connecting cannula (11).

6. The high-frequency nipple cutting tool with the angle zeroing function according to claim 1, further comprising a gear central shaft (16), wherein a pin hole (2-1) is formed in the proximal end face of the window (2-2) of the core rod (2), one end of the gear central shaft (16) is arranged in the pin hole (2-1), and the gear (15) is rotatably arranged on the gear central shaft (16).

7. The high-frequency nipple cutting tool with angle return to zero according to claim 6, wherein the distal end of the core rod (2) is provided with an opening communicated with the window (2-2), and the front end cap (17) is sleeved on the distal end of the core rod (2); the front end cap (17) limits the distal end of the gear central shaft (16).

8. A high frequency teat cutting knife with angular return to zero according to claim 1, further comprising a thumb ring (1), the thumb ring (1) being arranged at the proximal end of the core bar (2).

9. The high-frequency nipple cutting knife with angle return to zero according to any one of claims 1-8, characterized in that the shaft hole section of the rotating shaft (19) is circular, a limiting block (18) for pressing the rotating pipe (7) is arranged between the rotating shaft (19) and the rotating pipe (7), and when the rotating shaft (19) rotates, the limiting block (18) drives the rotating pipe (7) to synchronously rotate.

10. The high frequency nipple cutting knife with angle return to zero according to any one of claims 1-8, characterized in that the shaft hole section of the rotating shaft (19) is non-circular, the shape of the rotating guide tube (7) is adapted to the shaft hole section of the rotating shaft (19), and the rotating guide tube (7) is limited by the shaft hole shape of the rotating shaft (19).