Cervical canal expansion sheath

Abstract

The utility model relates to a cervical canal dilation sheath, which comprises a cervical cannula, a positioning component and a soft sleeve, two ends of the cervical cannula are respectively a body entering end and an operation end, the positioning component comprises a positioning claw and a linkage piece, the positioning claw is arranged at the body entering end, and the linkage piece is arranged at the operation end. A sleeve opening of the soft sleeve is fixedly connected with the body inlet end in a sealed mode, the soft sleeve is provided with at least two connecting parts, the connecting parts are located outside the operation end and used for being connected with the sealing rubber plug in a sealed mode, and the sealing rubber plug is used for being extruded by an instrument to enter the soft sleeve in a sealed mode. When the device is used for medical operation, the stable positioning and limiting effect can be achieved through the structural arrangement of the positioning claws, the two hands of medical staff are liberated, the medical staff can operate instruments with the two hands, and the advantage of being high in flexibility is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a cervical canal dilation sheath. Background Art

[0002] Hysteroscopy is a new, minimally invasive gynecological diagnostic and treatment technology. It is a fiber-light endoscope used for intrauterine examination and treatment. It includes a hysteroscope, an energy system, a light system, a perfusion system and an imaging system. It uses the front part of the scope to enter the uterine cavity and has a magnifying effect on the observed area. It has become the preferred examination method for gynecological hemorrhagic diseases and intrauterine lesions with its intuitive and accurate nature.

[0003] Currently, hysteroscopes generally have fixed instrument channels. During use, medical staff operate the hysteroscope as a whole in and out of the uterine cavity with one hand, and operate the instrument inside the hysteroscope channel with the other hand. The overall operation is relatively simple, and medical operations on the instrument cannot be performed with both hands, resulting in poor flexibility in use. Summary of the invention

[0004] In view of the above problems, the utility model provides a cervical canal dilation sheath, which can be firmly positioned and restricted at the uterine cavity opening by relying on a positioning structure during use, freeing the hands of medical staff, who can operate the instrument with both hands, and has the advantage of high flexibility.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A cervical canal dilation sheath, comprising:

[0007] A cervical cannula, wherein the two ends of the cervical cannula are an entry end and an operation end, wherein the entry end is used to enter the uterine cavity, and the operation end is used for instruments to enter the cervical cannula for operation;

[0008] A positioning assembly, the positioning assembly comprising a positioning claw and a linkage member that links the positioning claw to close and expand along the axial direction of the cervical cannula, the positioning claw is arranged at the body entry end, and the linkage member is arranged at the operating end; and

[0009] A soft sleeve, the sleeve opening of which extends into the cervical sleeve through the operating end, and the sleeve opening is sealed and fixedly connected to the entry end; the soft sleeve is provided with at least two connecting parts, the connecting parts are located outside the operating end and are used for sealingly connecting a sealing plug, and the sealing plug is used for the instrument to be squeezed and sealed into the soft sleeve.

[0010] In one embodiment, the positioning claw includes at least three limiting rods, and the limiting rods include:

[0011] a transmission section, the transmission section being rotationally connected to the cervical cannula and the transmission section being transmission-connected to the linkage member; and

[0012] A bending section is connected to the transmission section, and the bending section is bent outwardly in a direction away from the axis of the cervical cannula.

[0013] In one embodiment, the bending section is provided with a first anti-slip pattern, and when the bending section is rotated to the outer shell state, the first anti-slip pattern is used to contact the uterine cavity.

[0014] In one embodiment, four limiting rods are provided.

[0015] In one embodiment, the transmission section is arranged inside the wall of the cervical cannula.

[0016] In one embodiment, the linkage member includes a shifting block, the number and position of the shifting block are set corresponding to the limiting rod, and the shifting block is slidably connected to the cervical cannula;

[0017] A gear ring is arranged at one end of the transmission section, and a rack is correspondingly arranged on the shift block. The rack is correspondingly meshed with the gear ring, and the sliding of the shift block links the rotation of the bending section through the corresponding transmission section.

[0018] In one embodiment, a second anti-slip pattern is provided on the surface of the shift block.

[0019] In one embodiment, the cervical cannula is provided with travel grooves, the number and positions of the travel grooves are arranged correspondingly to the shifting block, and the shifting block is slidably connected with the cervical cannula in the travel grooves;

[0020] When the shifting block slides to one side of the travel groove, the bending section rotates to an outward expansion state facing away from the axis of the cervical cannula;

[0021] When the shifting block slides to the other side of the travel groove, the bending section rotates to a closed state close to the axis of the cervical cannula.

[0022] In one embodiment, a locking ball is provided on one side of the shift block, and a locking groove is correspondingly provided on one side of the travel groove;

[0023] When the bending section rotates to an outwardly expanded state facing away from the axis of the cervical cannula, the locking ball moves with the shifting block to be buckled and connected with the locking groove.

[0024] In one embodiment, the outer portion of the cervical cannula is covered with a soft sheath.

[0025] The utility model adopts the above technical solution, which has the following advantages:

[0026] When using this device for medical operations, the entry end of the cervical cannula is gradually inserted into the patient's uterine cavity. During the insertion process, the positioning claws are in a closed state as a whole. After the positioning claws enter the uterine cavity, the linkage parts are operated to drive the positioning claws to expand outward. At this time, the positioning claws are in an expanded state as a whole. The positioning claws are in contact with the inner wall of the uterine cavity. The expanded state restricts the entry end from leaving the uterine cavity. Subsequently, the instruments to be used are inserted into the soft sleeve through the sealing plug for surgical operations. The structural setting of the positioning claws can achieve a relatively stable positioning and limiting effect, freeing the hands of medical staff. Medical staff can operate the instruments with both hands, which has the advantage of high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the specific structure of the cervical canal dilation sheath in one embodiment of the utility model;

[0028] Figure 2 This is a structural diagram of the positioning claws in an outwardly expanded state in one embodiment of the utility model;

[0029] Figure 3 This is a schematic diagram of the specific structure of the linkage member in one embodiment of the utility model;

[0030] The marks in the figure are as follows:

[0031] 1. Cervical cannula; 11. Insertion end; 12. Operation end;

[0032] 2. Soft cover; 21. Cover opening; 22. Connecting part;

[0033] 3. Positioning claw; 31. Limiting rod; 311. Transmission section; 312. Bending section; 32. First anti-slip pattern;

[0034] 4. Linkage member; 41. Second anti-slip pattern;

[0035] 5. Travel slot. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary persons in the field without creative work are within the scope of protection of the utility model.

[0037] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0038] Hysteroscopy is a new, minimally invasive gynecological diagnostic and treatment technology. It is a fiber-light endoscope used for intrauterine examination and treatment. It includes a hysteroscope, an energy system, a light system, a perfusion system and an imaging system. It uses the front part of the scope to enter the uterine cavity and has a magnifying effect on the observed area. It has become the preferred examination method for gynecological hemorrhagic diseases and intrauterine lesions with its intuitive and accurate nature.

[0039] The current hysteroscope generally has a fixed instrument pipeline. During use, the medical staff operates the hysteroscope as a whole to enter and exit the uterine cavity with one hand, and controls the instrument inside the hysteroscope pipeline with the other hand. The overall operation is relatively simple, and the medical operation of the instrument cannot be performed with both hands, which has the problem of poor flexibility in use. In view of the above problems, the utility model provides a cervical canal dilation sheath, which can be firmly positioned and restricted at the uterine cavity opening by relying on a positioning structure during use, freeing the hands of the medical staff, and the medical staff can operate the instrument with both hands, which has the advantage of high flexibility. The specific scheme is as follows.

[0040] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, the utility model relates to a cervical canal dilation sheath, comprising a cervical cannula 1, a positioning assembly and a soft sleeve 2, wherein the two ends of the cervical cannula 1 are an entry end 11 and an operating end 12, wherein the entry end 11 is used to enter the interior of the uterine cavity, and the operating end 12 is used for instruments to enter the cervical cannula 1 for operation.

[0041] The positioning assembly includes a positioning claw 3 and a linkage member 4 that links the positioning claw 3 to close and expand along the axial direction of the cervical sleeve 1. The positioning claw 3 is arranged at the body entry end 11, and the linkage member 4 is arranged at the operating end 12.

[0042] The sleeve opening 21 of the soft sleeve 2 extends into the cervical sleeve 1 through the operating end 12, and the sleeve opening 21 is sealed and fixedly connected to the entry end 11; the soft sleeve 2 is provided with at least two connecting parts 22, which are located outside the operating end 12 and are used for sealingly connecting the sealing plug, which is used for the instrument to be squeezed and sealed into the soft sleeve 2.

[0043] It should be noted that the sealing rubber plug is a commonly used connecting part 22 of hysteroscopic instruments, which is used for the instruments to be squeezed and inserted during use. During the movement of the instruments, the sealing rubber plug can seal the insertion port of the instruments.

[0044] Illustratively, when the device is used for medical operations, the entry end 11 of the cervical cannula 1 is gradually inserted into the patient's uterine cavity. During the insertion process, the positioning claw 3 is in a closed state as a whole. After the positioning claw 3 enters the uterine cavity, the linkage part 4 is operated to drive the positioning claw 3 to expand outward. At this time, the positioning claw 3 is in an expanded state as a whole. The positioning claw 3 contacts the inner wall of the uterine cavity. Its expanded state restricts the entry end 11 from leaving the uterine cavity. Subsequently, the instruments to be used are inserted into the soft sleeve 2 through the sealing plug for surgical operations. The structural setting of the positioning claw 3 can achieve a relatively stable positioning and limiting effect, freeing the hands of medical staff. Medical staff can operate the instruments with both hands, which has the advantage of high flexibility.

[0045] In addition, the soft sleeve 2 is specifically provided with three connecting parts 22. The multiple connecting parts 22 enable the device to be simultaneously inserted with multiple instruments during use, and the number of instruments used is related to the size of the cervical opening. At the same time, in order to soften the overall shell of the device, a soft sheath is provided on the outside of the cervical cannula 1.

[0046] In one embodiment, the overall structure of the positioning claw 3 is further refined, and the positioning claw 3 includes at least three limiting rods 31. Specifically, the limiting rods 31 are set to 4 in total, and the limiting rods 31 include a transmission section 311 and a bending section 312, wherein the transmission section 311 is rotationally connected to the cervical cannula 1, and the transmission section 311 is transmission-connected to the linkage member 4. The bending section 312 is connected to the transmission section 311, and the bending section 312 is bent outwardly in a direction away from the axis of the cervical cannula 1.

[0047] In this embodiment, specifically, the transmission section 311 is arranged inside the tube wall of the cervical cannula 1. This structural arrangement can optimize the installation structure of the device, and the transmission section 311 is accommodated and arranged as a whole inside the tube wall of the cervical cannula 1, thereby avoiding friction between the transmission section 311 and the patient's body during rotation, thereby protecting the patient.

[0048] It should be noted that the linkage member 4 drives the bending section 312 to rotate by rotating the transmission limit rod 31, and when the bending section 312 rotates to face away from the axis of the cervical cannula 1, the entirety is in an outward expansion state. When the bending section 312 rotates to approach the axis of the cervical cannula 1, the positioning claw 3 is in a closed state as a whole.

[0049] When the positioning claw 3 is in the outward expansion state, the bending section 312 contacts the inner wall of the uterine cavity, and its outward expansion shape limits the cervical cannula 1 from leaving the uterine cavity. In this embodiment, it is better that in order to improve the overall contact friction of the bending section 312, a first anti-slip pattern 32 is provided on the bending section 312. When the bending section 312 rotates to the outer shell state, the first anti-slip pattern 32 is used to contact the uterine cavity.

[0050] In this embodiment, the overall structure of the linkage member 4 is further refined, and the linkage member 4 includes a shifting block, the number and position of which are set corresponding to the limit rod 31, and the shifting block is slidably connected to the cervical cannula 1. A gear ring is set at one end of the transmission section 311, and a rack is correspondingly set on the shifting block, and the rack is meshed with the gear ring, and the sliding of the shifting block is linked to the rotation of the bending section 312 through the corresponding transmission section 311.

[0051] Illustratively, by sliding the shift block, the transmission section 311 can be driven to rotate through the rack and the gear ring, and finally the bending section 312 is linked to rotate, so as to switch the closing state and the outward expansion state of the positioning claw 3 to achieve the linkage effect.

[0052] In this embodiment, in order to improve the control stability of the shift block, a second anti-slip pattern 41 is provided on the surface of the shift block.

[0053] In addition, in this embodiment, it is more preferable that a travel groove 5 is provided on the cervical cannula 1, the number and position of the travel groove 5 are set corresponding to the shift block, and the shift block is slidably connected with the cervical cannula 1 in the travel groove 5. When the shift block slides to one side of the travel groove 5, the bending section 312 rotates to an outward expansion state facing away from the axis of the cervical cannula 1, and when the shift block slides to the other side of the travel groove 5, the bending section 312 rotates to a closed state close to the axis of the cervical cannula 1.

[0054] It should be noted that the travel groove 5 guides and limits the travel of the shift block. The two ends of the travel groove 5 in the length direction can position the shift block. When the medical staff slides the shift block, the positioning claw 3 can be linked to the closed state or the expanded state by sliding the shift block to the two ends of the travel groove 5. The setting of the positioning structure enables the medical staff to operate the shift block blindly, thereby optimizing the ease of use of the device.

[0055] In this embodiment, it is more preferable that a locking ball is provided on one side of the shift block, and a locking groove is correspondingly provided on one side of the travel groove 5. When the bending section 312 rotates to an outwardly expanded state facing away from the axis of the cervical sleeve 1, the locking ball moves with the shift block to be connected with the locking groove buckle.

[0056] Through the arrangement of this structure, when the medical staff links the positioning claw 3 to the outward expansion state, the locking ball and the locking groove can be fixedly positioned in the outward expansion state through the buckle connection, thereby improving the use stability of the device.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A cervical canal dilation sheath, characterized in that: include: A cervical cannula, wherein the two ends of the cervical cannula are an entry end and an operation end, wherein the entry end is used to enter the uterine cavity, and the operation end is used for instruments to enter the cervical cannula for operation; A positioning assembly, the positioning assembly comprising a positioning claw and a linkage member that links the positioning claw to close and expand along the axial direction of the cervical cannula, the positioning claw is arranged at the body entry end, and the linkage member is arranged at the operating end; as well as A soft sleeve, the sleeve opening of which extends into the cervical sleeve through the operating end, and the sleeve opening is sealed and fixedly connected to the entry end; the soft sleeve is provided with at least two connecting parts, the connecting parts are located outside the operating end and are used for sealingly connecting a sealing plug, and the sealing plug is used for the instrument to be squeezed and sealed into the soft sleeve.

2. The cervical canal dilation sheath according to claim 1, characterized in that: The positioning claw includes at least three limiting rods, and the limiting rods include: a transmission section, the transmission section being rotationally connected to the cervical cannula and the transmission section being transmission-connected to the linkage member; and A bending section is connected to the transmission section, and the bending section is bent outwardly in a direction away from the axis of the cervical cannula.

3. The cervical canal dilation sheath according to claim 2, characterized in that: The bending section is provided with a first anti-slip pattern, and when the bending section is rotated to the outer shell state, the first anti-slip pattern is used to contact the uterine cavity.

4. The cervical canal dilation sheath according to claim 2, characterized in that: The limiting rods are provided with four.

5. The cervical canal dilation sheath according to claim 2, characterized in that: The transmission section is arranged inside the tube wall of the cervical cannula.

6. The cervical canal dilation sheath according to claim 2, characterized in that: The linkage member includes a shifting block, the number and position of the shifting block are set corresponding to the limiting rod, and the shifting block is slidably connected to the cervical cannula; A gear ring is arranged at one end of the transmission section, and a rack is correspondingly arranged on the shift block. The rack is correspondingly meshed with the gear ring, and the sliding of the shift block links the rotation of the bending section through the corresponding transmission section.

7. The cervical canal dilation sheath according to claim 6, characterized in that: The surface of the shift block is provided with second anti-slip grooves.

8. The cervical canal dilation sheath according to claim 6, characterized in that: The cervical cannula is provided with a travel groove, the number and position of the travel groove are set corresponding to the shift block, and the shift block is slidably connected with the cervical cannula in the travel groove; When the shifting block slides to one side of the travel groove, the bending section rotates to an outward expansion state facing away from the axis of the cervical cannula; When the shifting block slides to the other side of the travel groove, the bending section rotates to a closed state close to the axis of the cervical cannula.

9. The cervical canal dilation sheath according to claim 8, characterized in that: A locking ball is provided on one side of the shift block, and a locking groove is correspondingly provided on one side of the travel groove; When the bending section rotates to an outwardly expanded state facing away from the axis of the cervical cannula, the locking ball moves with the shifting block to be buckled and connected with the locking groove.

10. The cervical canal dilation sheath according to claim 1, characterized in that: The outer part of the cervical cannula is covered with a soft sheath.

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