Liquid injection device for breast duct endoscope

Abstract

The utility model discloses a liquid injection device of a breast duct endoscope. The liquid injection device comprises the breast duct endoscope, an endoscope sheath, a liquid injection handle and a locking and sealing mechanism, the liquid injection handle comprises a near-end handle and a far-end handle, the near end of the near-end handle is fixedly connected with the endoscope sheath, and a locking assembly for rotatably connecting the near-end handle and the far-end handle is arranged between the far end of the near-end handle and the near end of the far-end handle; the far end of the far-end handle is connected with a breast duct endoscope connector and a liquid injection connector which face different directions, and the central axis of the breast duct endoscope connector coincides with the central axis of the liquid injection handle; the locking and sealing mechanism is connected with the far end of the breast duct endoscope connector; inner cavities of the locking and sealing mechanism, the breast duct endoscope connector, the far-end handle, the near-end handle and the endoscope sheath are sequentially communicated to form a breast duct endoscope channel for a breast duct endoscope to penetrate through. The breast duct endoscope liquid injection device has good locking and sealing performance, the near-end handle can rotate relative to the far-end handle in a sealing mode, and the locking and sealing mechanism can seal the breast duct endoscope connector of the far-end handle and lock the breast duct endoscope.

Description

Technical Field

[0001] This utility model relates to the field of medical endoscope technology, and in particular to a ductoscope injection device. Background Technology

[0002] A ductal endoscope is an ultra-thin endoscopic product used to examine diseases within the mammary ducts. It is used in combination with a scope body, sheath, and handle. In clinical practice, fluid is injected through the inlet on the handle, and the fluid flows out between the sheath and the lens, thus completing the irrigation of the patient's mammary ducts. If conventional sealing methods are used between the sheath and the handle, leakage will occur. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a ductoscope injection device.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a ductoscope injection device, which includes a ductoscope and a sheath, an injection handle, and a locking and sealing mechanism connected in sequence; the injection handle includes a proximal handle and a distal handle, the proximal end of the proximal handle is fixedly connected to the sheath, and a locking component is provided between the distal end of the proximal handle and the proximal end of the distal handle to rotatably connect the two; the distal end of the distal handle is connected to a ductoscope connector and an injection connector with different orientations, and the central axis of the ductoscope connector coincides with that of the injection handle; the interior of the ductoscope connector and the interior of the locking and sealing mechanism are connected, and when the ductoscope is inserted, the locking and sealing mechanism is connected to the distal end of the ductoscope connector to seal the gap between the outer wall of the ductoscope and the locking and sealing mechanism;

[0005] The locking and sealing mechanism, the ductoscope connector, the distal handle, the proximal handle, and the inner cavity of the endoscope sheath are sequentially connected to form a ductoscope channel for the ductoscope to pass through. During injection, the liquid enters the injection handle from the injection connector and flows out of the endoscope sheath along the channel between the inner wall of the ductoscope channel and the outer wall of the ductoscope.

[0006] In some embodiments, the proximal handle includes a mounting housing and an infusion connector partially located within the mounting housing, the mounting housing and the infusion connector being connected by fasteners, and a locking assembly being located between the inner cavity of the mounting housing and the inner cavity of the infusion connector;

[0007] The distal handle includes an injection chamber and an injection fitting connected to the injection chamber. The proximal end of the injection fitting is inserted into the infusion connector, and a locking assembly is fitted over the injection fitting.

[0008] In some embodiments, the locking assembly includes a sealing kit and a locking kit. The sealing kit includes at least one first seal and a mounting member. The first seal has an axially penetrating first central hole, and the mounting member has an axially penetrating second central hole. A limiting groove is formed between the inner cavity of the infusion connector and the end face of the mounting member. The first seal is engaged in the limiting groove, and the infusion tube is sequentially inserted through the second central hole and the first central hole.

[0009] In some embodiments, the injection fitting of the distal handle includes an inlet section, a positioning section, and an insertion section connected in sequence. The inlet section is located inside the injection chamber. The positioning section extends from the end of the inlet section to the proximal end, and the insertion section extends from the end of the positioning section to the proximal end. The outer diameters of the proximal end of the inlet section, the positioning section, and the insertion section decrease sequentially. After the proximal handle and the distal handle are connected, the proximal end of the inlet section abuts against the distal end of the mounting housing. The distal end of the mounting housing is sleeved outside the positioning section, and the insertion section passes through the locking assembly.

[0010] In some embodiments, the locking kit includes a first anti-reverse member disposed within the mounting housing, the first anti-reverse member being sleeved outside the injection tube and limited between the mounting member and the distal inner wall of the mounting housing;

[0011] The locking kit also includes a backstop ring. The inner wall of the mounting piece is provided with a first positioning groove facing the second center hole, and the outer wall of the injection tube is provided with a second positioning groove corresponding to the first positioning groove. The backstop ring is engaged between the first positioning groove and the second positioning groove.

[0012] In some embodiments, the locking and sealing mechanism includes a locking connector and a connecting pipe fitting disposed within the locking connector. The distal end face of the connecting pipe fitting abuts against the distal inner wall surface of the locking connector. The proximal end of the connecting pipe fitting is inserted into the ductoscope connector. The locking connector is sleeved outside the ductoscope connector. The locking connector and the ductoscope connector are threaded together.

[0013] In some embodiments, the inner wall of the proximal end of the locking connector is provided with an internal thread, and the outer wall of the distal end of the endoscopic connector is provided with an outwardly protruding external thread. The axial length of the internal thread is greater than the axial length of the external thread, and the internal thread and the external thread are connected in a mating manner.

[0014] The locking and sealing mechanism also includes a second anti-reverse element, which is sleeved on the proximal end of the locking joint and is threadedly connected to the locking joint.

[0015] In some embodiments, the ductoscope connector has a first cavity and a second cavity connected along its axial direction, the inner diameter of the second cavity is larger than the inner diameter of the first cavity, and the connecting pipe is inserted into the second cavity;

[0016] The locking and sealing mechanism also includes a second sealing element, which seals between the second cavity and the end of the connecting pipe. The second sealing element has through holes extending through both ends of it, and the inner cavity, through holes and first cavity of the connecting pipe are connected in sequence.

[0017] The distal sidewall of the connecting pipe extends outward to form a boss; the locking joint rotates to push the connecting pipe to move axially within the second cavity, the proximal end of the connecting pipe abuts against the second seal, and the distal end of the ductoscope connector abuts against the boss.

[0018] In some embodiments, at least two injection connectors are provided, and the included angle between the injection connector and the central axis of the distal handle is (0, 90°). One end of the injection connector is connected to the distal handle, and the other end of the injection connector is an open end. A detachable sealing element is provided on the open end, and the outer surface of the sealing element is provided with anti-slip texture.

[0019] In some embodiments, the sheath includes a base and a sheath tube, one end of which is inserted into the base, the interior of the sheath tube is connected to the interior of the base, the sheath tube coincides with the central axis of the injection handle, and the distal end of the base is fixedly connected to the proximal end of the injection handle.

[0020] The beneficial effects of this invention are as follows: In the ductoscope injection device of this invention, the sealing performance between the endoscope sheath, the injection handle, the locking and sealing mechanism, and the ductoscope is good. When liquid is injected from the injection joint of the injection handle, the liquid can only flow out from the proximal end of the endoscope sheath. When the proximal handle is rotated to drive the endoscope sheath to rotate, the locking component between the proximal handle and the distal handle can ensure that both have good locking and sealing performance. The locking and sealing mechanism can seal the ductoscope joint of the distal handle and lock the ductoscope. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0022] Figure 1 This is a cross-sectional view of a ductoscope injection device according to some embodiments of the present invention;

[0023] Figure 2 This is a cross-sectional view of the injection handle and locking sealing mechanism of some embodiments of this utility model;

[0024] Figure 3 yes Figure 1 A cross-sectional view of the locking assembly in an exploded state;

[0025] Figure 4 This is a cross-sectional view of the distal handle of some embodiments of this utility model;

[0026] Figure 5 This is a cross-sectional view of the locking and sealing mechanism of some embodiments of this utility model in an exploded state;

[0027] Figure 6 This is a cross-sectional view of the mirror sheath of some embodiments of this utility model;

[0028] Figure 7 This is a cross-sectional view of a ductoscope according to some embodiments of the present invention;

[0029] The reference numerals in the attached diagram are as follows: 1. Mirror sheath; 11. Base; 12. Sheath tube; 2. Proximal handle; 21. Mounting housing; 22. Infusion connector; 23. Locking assembly; 231. Sealing kit; 2311. First seal; 2311a. First center hole; 2312. Mounting component; 2312a. Second center hole; 2312b. First positioning groove; 2313. Isolator; 232. Locking kit; 2321. First anti-reverse element; 2322. Anti-reverse ring; 24. Fastener; 25. Luer connector; 3. Distal end 31. Handle; 32. Injection chamber; 33. Injection fitting; 34. Inlet section; 35. Positioning section; 36. Insertion section; 37. 38. Second positioning groove; 39. Endoscope connector; 30. First cavity; 31. Second cavity; 32. External thread; 33. Injection connector; 34. Sealing component; 45. Locking and sealing mechanism; 41. Locking connector; 411. Internal thread; 42. Connecting fitting; 421. Boss; 43. Second sealing component; 431. Through hole; 44. Second anti-reverse component; 5. Endoscope; 51. Endoscope body. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the communication of mechanisms within two components or the interaction between two components. When an element is referred to as being "on" or "below" another element, that element can be located "directly" or "indirectly" on the other element, or there may be one or more intermediary elements. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0032] Orientation definition: After the ductoscope of the ductoscopy infusion device is inserted into the patient's milk duct, the proximal end refers to the end of the ductoscopy infusion device closest to the patient, and the distal end refers to the end of the ductoscopy infusion device furthest from the patient. Axis refers to the direction of the central axis of the ductoscopy infusion device.

[0033] Figures 1 to 7 This illustration shows a ductoscope injection device according to some embodiments of the present invention. It includes a ductoscope 5 and a sheath 1, an injection handle, and a locking and sealing mechanism 4 connected sequentially. The injection handle includes a proximal handle 2 and a distal handle 3. The proximal end of the proximal handle 2 is fixedly connected to the sheath 1. A locking assembly 23 rotatably connects the distal ends of the proximal handle 2 and the proximal ends of the distal handle 3. The distal end of the distal handle 3 is connected to a ductoscope connector 33 and an injection connector 34 with different orientations. The ductoscope connector 33 coincides with the central axis of the injection handle. The ductoscope connector 33 communicates with the inner cavity of the injection handle for connecting the ductoscope 5, and the injection connector 34 communicates with the inner cavity of the injection handle for injecting liquid.

[0034] like Figure 1 As shown, Figure 1 This is a cross-sectional view of the ductoscope injection device. The locking and sealing mechanism 4, the ductoscope connector 33, the distal handle 3, the proximal handle 2, and the inner cavity of the sheath 1 are sequentially connected to form the ductoscope 5 channel, through which the ductoscope 5 passes. During injection, the liquid enters the injection handle from the injection connector 34 and flows out of the sheath 1 along the channel between the inner wall of the ductoscope 5 channel and the outer wall of the ductoscope 5.

[0035] like Figure 2 As shown, Figure 2 This is a cross-sectional view of the infusion handle and locking sealing mechanism 4. The proximal handle 2 includes a mounting housing 21 and an infusion connector 22 partially located within the mounting housing 21. The mounting housing 21 and the infusion connector 22 are connected by fasteners 24. A locking assembly 23 is located between the inner cavity of the mounting housing 21 and the inner cavity of the infusion connector 22. In some embodiments, the infusion connector 22 includes a first segment, a second segment, and a third segment connected sequentially from the proximal end to the distal end, with the outer diameters of the first, second, and third segments increasing sequentially. The outer wall of the third segment contacts the inner wall of the mounting housing 21. Specifically, the proximal outer wall of the third segment is threadedly connected to the proximal inner wall of the mounting housing 21. The distal outer wall of the mounting housing 21 is provided with at least two circumferentially spaced connecting through holes. Fasteners 24 pass through the connecting through holes and abut against the distal outer wall of the third segment to fix the mounting housing 21 to the infusion connector 22. The number of fasteners 24 is equal to the number of connecting through holes. The fasteners 24 can be screws, bolts, etc.

[0036] The proximal end of the infusion connector 22 is inserted into the distal end of the endoscope sheath 1. Specifically, the endoscope sheath 1 and the infusion connector 22 are connected by a Luer connector 25. The first section of the infusion connector 22 is inserted into the distal end of the endoscope sheath 1. The outer wall of the second section of the infusion connector 22 is threadedly connected to the inner wall of the distal end of the Luer connector 25. A retaining adhesive is provided at the threaded connection to securely connect the Luer connector 25 and the infusion connector 22. The distal end of the Luer connector 25 abuts against the proximal end of the third section of the infusion connector 22. The Luer connector is easy to assemble and disassemble and provides a seal; a 6% Luer connector is preferred.

[0037] like Figure 4 As shown, Figure 4 The diagram shows a cross-sectional view of the distal handle 3. The distal handle 3 includes an injection chamber 31 and an injection fitting 32 connected to the injection chamber 31. The proximal end of the injection fitting 32 is inserted into the infusion connector 22, and a locking assembly 23 is sleeved on the outside of the injection fitting 32. The injection fitting 32 of the distal handle 3 includes an inlet section 321, a positioning section 322, and an insertion section 323 connected in sequence. The inlet section 321 is located inside the injection chamber 31. The positioning section 322 extends from the end of the inlet section 321 towards the proximal end, and the insertion section 323 extends from the end of the positioning section 322 towards the proximal end. The outer diameters of the proximal end of the inlet section 321, the positioning section 322, and the insertion section 323 decrease sequentially. After the proximal handle 2 and the distal handle 3 are connected, the proximal end of the liquid inlet section 321 abuts against the distal end of the mounting housing 21, the distal end of the mounting housing 21 is sleeved outside the positioning section 322, and the insertion section 323 passes through the locking assembly 23.

[0038] Furthermore, the infusion connector 22 of the proximal handle 2 and the injection tubing 32 of the distal handle 3 are axially aligned, and the locking assembly 23 between the infusion connector 22 and the injection tubing 32 enables the proximal handle 2 to be rotatably sealed relative to the distal handle 3. Figure 3 As shown, Figure 3 This is a cross-sectional view of the locking assembly 23 in an exploded state. The locking assembly 23 includes a sealing kit 231 and a locking kit 232. The sealing kit 231 includes at least one first seal 2311 and a mounting member 2312. The first seal 2311 has an axially penetrating first central hole 2311a, and the mounting member 2312 has an axially penetrating second central hole 2312a. Figure 2 As shown, a limiting groove is formed between the inner cavity of the infusion connector 22 and the end face of the mounting part 2312. The first sealing part 2311 is stuck in the limiting groove, and the injection tube 32 is sequentially inserted through the second central hole 2312a and the first central hole 2311a.

[0039] The first sealing element 2311 can be a silicone ring. Between the proximal handle 2 and the distal handle 3, the silicone ring is deformed by rotation and compression, thereby filling the gap between the proximal handle 2 and the distal handle 3 to achieve an internal and external seal. In some embodiments, at least two first sealing elements 2311 are used, which can extend the service life of the first sealing elements 2311 and improve the sealing effect. The sealing kit 231 also includes at least one isolation element 2313, which is disposed between two adjacent first sealing elements 2311. The isolation element 2313 can prevent direct contact and friction between the sealing rings and also provides support and fixation. For example... Figure 2 As shown, the sealing kit 231 includes two first seals 2311, one isolator 2313, and a mounting member 2312. The insertion section 323 of the injection tubing 32 passes sequentially from the distal end to the proximal end through the mounting member 2312, one first seal 2311, the isolator 2313, and the other first seal 2311. The sealing between the injection tubing 32 and the inner cavity of the infusion connector 22 is achieved through the compression deformation of the first seals 2311. During the injection operation, no leakage occurs between the proximal handle 2 and the distal handle 3 when the proximal handle 2 is rotated.

[0040] The locking assembly 232 includes a first anti-reverse member 2321 disposed within the mounting housing 21. The first anti-reverse member 2321 is sleeved on the outside of the injection tube 32 and is limited between the mounting member 2312 and the distal inner wall of the mounting housing 21. The locking assembly 232 also includes an anti-reverse ring 2322. The inner wall of the mounting member 2312 is provided with a first positioning groove 2312b facing the second central hole 2312a. The outer wall of the injection tube 32 is provided with a second positioning groove 3231 corresponding to the first positioning groove 2312b. The anti-reverse ring 2322 is engaged between the first positioning groove 2312b and the second positioning groove 3231. Furthermore, the locking assembly 232 is fitted onto the distal end of the insertion section 323 of the injection tube 32, and the first positioning groove 2312b is formed on the distal inner wall of the mounting member 2312. The anti-reverse ring 2322 is located on the distal inner wall of the mounting member 2312, while the distal end of the mounting housing 21 is fitted onto the positioning section 322 of the injection tube 32. Thus, the anti-reverse ring 2322 abuts against the first anti-reverse member 2321 and limits it between the anti-reverse ring 2322 and the proximal end face of the positioning section 322, preventing axial movement of the first anti-reverse member 2321 and allowing only rotation. The locking assembly 232 locks the insertion section 323 of the injection tube 32 into the inner cavity of the proximal handle 2, allowing the proximal handle 2 and the distal handle 3 to be combined into a single unit while still allowing relative rotation.

[0041] When assembling the proximal handle 2 and the distal handle 3, the infusion connector 22 and the mounting housing 21 are rotatably connected. The locking assembly 23 moves axially towards the proximal end, and the first seal 2311 is deformed under compression, thereby achieving a sealed lock between the proximal handle 2 and the distal handle 3. Then, the fastener 24 is installed in the connecting through hole of the mounting housing 21 to ensure that the infusion connector 22 and the mounting housing 21 do not move axially relative to each other. When the proximal handle 2 is rotated, the mounting housing 21, the infusion connector 22 and the isolation member 2313 of the locking assembly 23, the mounting member 2312, and the first anti-reverse member 2321 rotate relative to the infusion tubing 32. At the same time, the proximal handle 2 drives the sheath 1, which is fixedly connected to it, to rotate.

[0042] Combination Figure 2 , Figure 5 As shown, Figure 5 This is a cross-sectional view of the locking and sealing mechanism 4 in an exploded state. The locking and sealing mechanism 4 includes a locking connector 41 and a connecting pipe 42 disposed within the locking connector 41. The distal end face of the connecting pipe 42 abuts against the distal inner wall surface of the locking connector 41, and the proximal end of the connecting pipe 42 is inserted into the ductoscope connector 33. The locking connector 41 is sleeved on the outside of the ductoscope connector 33, and the locking connector 41 and the ductoscope connector 33 are threadedly connected. The locking and sealing mechanism 4 is sleeved on the distal end of the ductoscope connector 33, and the interior of the ductoscope connector 33 and the interior of the locking and sealing mechanism 4 are connected. When the ductoscope 5 is inserted, the locking and sealing mechanism 4 connects with the distal end of the ductoscope connector 33 to seal the gap between the outer wall of the ductoscope 5 and the locking and sealing mechanism 4.

[0043] In some embodiments, the inner wall of the locking connector 41 at its proximal end is provided with an internal thread 411, and the outer wall of the duct end of the ...

[0044] The locking and sealing mechanism 4 also includes a second anti-reverse member 44, which is sleeved on the proximal end of the locking connector 41 and threadedly connected to the locking connector 41. Specifically, the distal end of the ductoscope connector 33 passes through the second anti-reverse member 44, the outer wall of the proximal end of the locking connector 41 is recessed inward, and the outer wall of the proximal end of the locking connector 41 is threadedly connected to the inner wall of the second anti-reverse member 44. The distal end of the second anti-reverse member 44 abuts against the distal end of the locking connector 41. The distal end of the locking connector 41 is a knob, and rotating the knob can adjust the tightness between the ductoscope connector 33 and the locking connector 41, and between the locking connector 41 and the second anti-reverse member 44. In some embodiments, the sidewall of the knob may be provided with a knurled pattern, such as an M0.3 knurled pattern.

[0045] In some embodiments, the diameter of the proximal opening of the second anti-reverse member 44 is smaller than the outer diameter of the external thread 333 of the ductoscope connector 33. When the locking connector 41 moves axially to the distal end, the proximal inner wall of the second anti-reverse member 44 abuts against the proximal end of the external thread 333, so that the second anti-reverse member 44 will not come out of the distal end of the ductoscope connector 33, and at the same time, the ductoscope connector 33 and the locking connector 41 can be prevented from separating.

[0046] The endoscope connector 33, connected to the distal end of the injection chamber 31, has a first cavity 331 and a second cavity 332 connected along its axial direction. The inner diameter of the second cavity 332 is larger than the inner diameter of the first cavity 331. The connecting pipe 42 is inserted into the second cavity 332. The locking and sealing mechanism 4 also includes a second sealing element 43, which may be a silicone ring. The second sealing element 43 seals between the ends of the second cavity 332 and the connecting pipe 42. The second sealing element 43 has through holes 431 extending through both ends. The inner cavity of the connecting pipe 42, the through holes 431, and the first cavity 331 are connected in sequence. The distal sidewall of the connecting pipe 42 extends outward to form a boss 421. The locking connector 41 rotates to push the connecting pipe 42 to move axially within the second cavity 332. The proximal end of the connecting pipe 42 presses against the second sealing element 43, and the distal end of the endoscope connector 33 abuts against the boss 421.

[0047] When assembling the ductoscope connector 33 and the locking and sealing mechanism 4, the distal end of the locking connector 41 is rotated to move axially towards the proximal end, thereby pushing the connecting pipe 42 inside the locking connector 41 to move axially towards the proximal end. The connecting pipe 42 squeezes the second sealing member 43, causing it to deform within the second cavity 332 of the ductoscope connector 33, thereby filling the gap between the ductoscope connector 33, the locking and sealing mechanism 4 and the ductoscope 5, achieving the function of internal and external sealing, and also locking the ductoscope 5.

[0048] At least two injection connectors 34 are provided at the distal end of the injection chamber 31. The injection connectors 34 are located on opposite sides of the ductoscope connector 33, and the angle formed between the injection connector 34 and the central axis of the distal handle 3 is (0°, 90°). For example, 15°, 30°, 45°, 60°, 90°, etc., can be selected, as long as the different connectors do not interfere with each other. In this way, the injection connectors 34 and the ductoscope connector 33 are staggered in different orientations, which is beneficial for operations such as injection and connection of the ductoscope 5. The injection connectors 34 can be used to treat the patient's lesion location. It is used for disinfection or other therapeutic purposes. One end of the injection connector 34 is connected to the distal handle 3, and the other end of the injection connector 34 is an open end. Liquid is injected through the injection port at the open end. A detachable sealing element 35 is provided on the open end. When no injection operation is being performed, the sealing element 35 is installed on the open end to ensure that the injection handle is sealed from the outside. In some embodiments, the sealing element 35 adopts a 6% Luer connector. The outer surface of the sealing element 35 is provided with anti-slip texture to facilitate manual rotation for disassembly or assembly. The anti-slip texture can be an M0.3 knurled pattern.

[0049] like Figure 6 As shown, Figure 6 This is a cross-sectional view of the endoscope sheath 1. The endoscope sheath 1 includes a base 11 and a sheath tube 12. One end of the sheath tube 12 is inserted into the base 11, and the interior of the sheath tube 12 is connected to the interior of the base 11. The central axis of the sheath tube 12 coincides with that of the injection handle. The distal end of the base 11 is fixedly connected to the proximal end of the injection handle. A side hole is provided on the proximal side wall of the sheath tube 12. After the endoscope sheath 1 and the proximal handle 2 are connected, they form a whole. Rotating the proximal handle 2 causes the endoscope sheath 1 to rotate together, forming an incision through the side hole on the sheath tube 12 to achieve the function of rotary cutting of tissue.

[0050] The endoscope sheath 1, proximal handle 2, distal handle 3, infusion connector 34, ductoscope connector 33, and locking and sealing mechanism 4 can all be made of materials that meet the standards for medical stainless steel tubes.

[0051] like Figure 7 As shown, Figure 7 This is a cross-sectional view of a ductoscope 5, an ultra-thin endoscope used for examining breast diseases. The ductoscope 5 includes a body 51, the specific structural composition of which can be referenced from existing ductoscopes 5. Figure 1 As shown, the ductoscope 5 is sequentially inserted into the locking and sealing mechanism 4, the ductoscope connector 33, the distal handle 3, the proximal handle 2, and the sheath 1. During the infusion process, the liquid (physiological saline or drug) enters the infusion chamber 31 from the infusion connector 34, flows along the endoscope 51 from the distal end to the proximal end through the inner cavity of the infusion tube 32, the inner cavity of the infusion connector 22, and the inner cavity of the seat 11, and finally flows out from between the sheath 12 and the endoscope 51, thereby completing the irrigation operation of the patient's mammary duct.

[0052] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0053] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A ductoscope injection device, characterized in that, The device includes a ductoscope (5) and a sheath (1), an injection handle, and a locking and sealing mechanism (4) connected in sequence. The injection handle includes a proximal handle (2) and a distal handle (3). The proximal end of the proximal handle (2) is fixedly connected to the sheath (1). A locking assembly is provided between the distal end of the proximal handle (2) and the proximal end of the distal handle (3) to rotatably connect the two. The distal end of the distal handle (3) is connected to a ductoscope connector (33) with different orientations and an injection connector (34). The ductoscope connector (33) coincides with the central axis of the injection handle. The interior of the ductoscope connector (33) is connected to the interior of the locking and sealing mechanism (4). When the ductoscope (5) is inserted, the locking and sealing mechanism (4) is connected to the distal end of the ductoscope connector (33) to seal the gap between the outer wall of the ductoscope (5) and the locking and sealing mechanism (4). The locking and sealing mechanism (4), the ductoscope connector (33), the distal handle (3), the proximal handle (2), and the inner cavity of the sheath (1) are sequentially connected to form a ductoscope (5) channel for the ductoscope (5) to pass through; during injection, the liquid enters the injection handle from the injection connector (34) and flows out of the sheath (1) along the channel between the inner wall of the ductoscope (5) channel and the outer wall of the ductoscope (5).

2. The ductoscope injection device according to claim 1, characterized in that, The proximal handle (2) includes a mounting housing (21) and an infusion connector (22) partially located within the mounting housing (21). The mounting housing (21) and the infusion connector (22) are connected by fasteners (24). The locking assembly (23) is located between the inner cavity of the mounting housing (21) and the inner cavity of the infusion connector (22). The distal handle (3) includes an injection chamber (31) and an injection tube connected to the injection chamber (31). The proximal end of the injection tube is inserted into the infusion connector (22), and the locking assembly (23) is sleeved on the outside of the injection tube (32).

3. The ductoscope injection device according to claim 2, characterized in that, The locking assembly (23) includes a sealing kit (231) and a locking kit (232). The sealing kit (231) includes at least one first sealing element (2311) and a mounting element (2312). The first sealing element (2311) has an axially penetrating first central hole (2311a). The mounting element (2312) has an axially penetrating second central hole (2312a). A limiting groove is formed between the inner cavity of the infusion connector (22) and the end face of the mounting element (2312). The first sealing element (2311) is engaged in the limiting groove. The infusion tube (32) passes through the second central hole (2312a) and the first central hole (2311a) in sequence.

4. The ductoscope injection device according to claim 2, characterized in that, The injection fitting of the distal handle (3) includes an inlet section (321), a positioning section (322), and an insertion section (323) connected in sequence. The inlet section (321) is located inside the injection chamber (31). The positioning section (322) extends from the end of the inlet section (321) to the proximal end. The insertion section (323) extends from the end of the positioning section (322) to the proximal end. The outer diameters of the proximal end of the inlet section (321), the positioning section (322), and the insertion section (323) decrease sequentially. After the proximal handle (2) and the distal handle (3) are connected, the proximal end of the inlet section (321) abuts against the distal end of the mounting housing (21). The distal end of the mounting housing (21) is sleeved outside the positioning section (322). The insertion section (323) passes through the locking assembly (23).

5. The ductoscope injection device according to claim 3, characterized in that, The locking kit (232) includes a first anti-reverse member (2321) disposed within the mounting housing (21), the first anti-reverse member (2321) being sleeved outside the injection tube (32) and limited between the mounting member (2312) and the distal inner wall of the mounting housing (21); The locking kit (232) also includes a backstop ring (2322). The inner wall of the mounting member (2312) is provided with a first positioning groove (2312b) facing the second central hole. The outer wall of the injection tube (32) is provided with a second positioning groove (3231) corresponding to the first positioning groove (2312b). The backstop ring (2322) is engaged between the first positioning groove (2312b) and the second positioning groove (3231).

6. The ductoscope injection device according to claim 1, characterized in that, The locking and sealing mechanism (4) includes a locking connector (41) and a connecting pipe (42) disposed within the locking connector (41). The distal end face of the connecting pipe (42) abuts against the distal inner wall surface of the locking connector (41). The proximal end of the connecting pipe (42) is inserted into the ductoscope connector (33). The locking connector (41) is sleeved outside the ductoscope connector (33). The locking connector (41) and the ductoscope connector (33) are threadedly connected.

7. The ductoscope injection device according to claim 6, characterized in that, The locking connector (41) has an internal thread (411) on its proximal inner wall and an external thread (333) protruding outward on its distal outer wall. The axial length of the internal thread (411) is greater than the axial length of the external thread (333). The internal thread (411) and the external thread (333) are connected in a mating manner. The locking and sealing mechanism (4) further includes a second anti-reverse member (44), which is sleeved on the proximal end of the locking connector (41) and is threadedly connected to the locking connector (41).

8. The ductoscope injection device according to claim 6, characterized in that, The ductoscope connector (33) has a first cavity (331) and a second cavity (332) connected along its axial direction. The inner diameter of the second cavity (332) is larger than the inner diameter of the first cavity (331). The connecting pipe (42) is inserted into the second cavity (332). The locking and sealing mechanism (4) further includes a second sealing element (43), which is sealed between the second cavity (332) and the end of the connecting pipe (42). The second sealing element (43) is provided with through holes (431) penetrating both ends therethrough. The inner cavity of the connecting pipe (42), the through holes (431) and the first cavity (331) are connected in sequence. The distal sidewall of the connecting pipe (42) extends outward to form a boss (421); the locking connector (41) rotates to push the connecting pipe (42) to move axially within the second cavity (332), the proximal end of the connecting pipe (42) abuts against the second seal (43), and the distal end of the ductoscope connector (33) abuts against the boss (421).

9. The ductoscope injection device according to claim 1, characterized in that, At least two injection connectors (34) are provided, and the included angle between the injection connector (34) and the central axis of the distal handle (3) is (0, 90°). One end of the injection connector (34) is connected to the distal handle (3), and the other end of the injection connector (34) is an open end. A detachable sealing member (35) is provided on the open end, and the outer surface of the sealing member (35) is provided with anti-slip texture.

10. The ductoscope injection device according to claim 1, characterized in that, The sheath (1) includes a base (11) and a sheath tube (12). One end of the sheath tube (12) is inserted into the base (11). The interior of the sheath tube (12) is connected to the interior of the base (11). The sheath tube (12) coincides with the central axis of the injection handle. The distal end of the base (11) is fixedly connected to the proximal end of the injection handle.

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