Cervical cerclage device

Abstract

The utility model relates to a cervical cerclage device which comprises a plurality of sheet-shaped cerclage bodies, supporting lugs are arranged on the outer side faces of the cerclage bodies, connecting holes are formed in the supporting lugs in a penetrating mode so that operation lines can penetrate through the supporting lugs conveniently, and the axial direction of the connecting holes is consistent with the length direction of the cerclage bodies. A plurality of sharp teeth are arranged on the inner side face of the cerclage body in a protruding mode, and the cerclage body can be bent towards the side where the inner side face is located to form an arc shape. The cerclage bodies are used for being arranged in the circumferential direction of the cervix uteri at intervals, the inner side faces of the cerclage bodies are attached to the cervix uteri, the sharp teeth penetrate through the cervix uteri, and an operation line sequentially penetrates through the connecting holes in the corresponding supporting lugs and then is tightened so that the cerclage bodies can be tightened inwards to complete cerclage. Due to the split type design, the cervical cerclage device is higher in applicability, and due to the sheet-shaped structure, the stress area can be increased so as to reduce tension, and the situation of tissue cutting is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a cervical cerclage device. Background Art

[0002] The length of the cervix during pregnancy is more than 3 cm. In the late pregnancy, as the cervix matures, the cervix will slowly shorten and expand, and finally become one with the uterus, forming a birth canal to facilitate delivery. However, women in mid-pregnancy may suffer from miscarriage due to various reasons, which may cause premature and rapid shortening and expansion of the cervix. Therefore, patients with habitual miscarriage need to undergo cerclage. The main disadvantages of cervical cerclage are: 1) Cervical cerclage is an invasive surgery, and the surgical thread used for suture is relatively thin and has high tension, which can easily cause cutting trauma to the cervical tissue and further cause infection; 2) If the cerclage is located too low, fetal membrane rupture may occur.

[0003] In the prior art, there are cases where surgical threads are replaced with ligatures or bands to avoid tissue cutting, such as the cervical cerclage device disclosed in Chinese patent CN203290989U, which is provided with convex teeth on the inner wall of the cylindrical cerclage body and corresponding ears on the outer wall. When in use, the cerclage body is sent into the vagina by a clamp and put on the cervical ligation position, and then the cerclage body is deformed by the clamp to tie the cervix. However, if a cervical cerclage device with this structure is encountered on a patient with a large cervical diameter, it is difficult to put it on; therefore, it has low clinical applicability, and if products of different specifications are produced, the production cost will be correspondingly raised. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a cervical cerclage device to avoid the problem that the size of the existing cervical cerclage device is difficult to apply to different patients in clinical practice, thereby achieving the effect of not causing tissue cutting while improving applicability.

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

[0006] A cervical cerclage device, comprising a plurality of sheet-shaped cerclage bodies, wherein the outer surface of the cerclage body is provided with ears, and the ears are penetrated with connecting holes for surgical thread to pass through, and the axial direction of the connecting holes is consistent with the length direction of the cerclage body; the inner side surface of the cerclage body is protruded with a plurality of sharp teeth, and the cerclage body can be bent toward the side where the inner side surface is located to form an arc shape;

[0007] Each cerclage body is used to be arranged at intervals in the circumference of the cervix so that the inner side of the cerclage body is in contact with the cervix and the sharp teeth pass through the cervix. The surgical thread passes through the connecting holes on the corresponding ears in turn and is tightened so that each cerclage body is tightened inward to complete the cerclage.

[0008] To further improve the technical solution, the cerclage body comprises a first clamp body and a second clamp body, the first clamp body and the second clamp body are curved in opposite arcs, the first clamp body and the second clamp body are provided with sharp teeth on the opposite inner sides, and the sharp teeth on the first clamp body and the second clamp body are arranged in a staggered manner;

[0009] A plurality of sharp teeth are located at the tail of the first clamp body and the second clamp body, an ear plate is extended from the head of the first clamp body and the second clamp body, a plurality of lugs are staggeredly arranged on the opposite surfaces of the two ear plates, and the first clamp body and the second clamp body are rotatably connected through the lugs;

[0010] Through holes are vertically opened on the two ear plates to form the connecting holes.

[0011] Furthermore, an elastic member and a rotating shaft are provided between the two ear plates, a through hole is vertically opened on the lug, the rotating shaft passes through the through hole on the lug, and the elastic member is elastically connected to the rotating shaft so that the first clamp body and the second clamp body can automatically rotate around the rotating shaft towards each other.

[0012] Furthermore, the first clamp body and the second clamp body each have at least two sharp teeth on the inner side surface of the tail portion, wherein the two sharp teeth are spaced apart at two ends of the inner side surface thereof along the axial direction of the lug.

[0013] Furthermore, the number of the cerclage bodies is four.

[0014] Furthermore, the first clamping body, the second clamping body and the elastic member are all made of metal materials.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. A cervical cerclage device of the present invention, compared with the existing structure of cerclage rings or bands, is designed in a split type to be a plurality of sheet-like cerclage bodies, with a plurality of sharp teeth arranged on the inner side in contact with the cervix, and a support ear with a connecting hole arranged on the outer side; in this way, an instrument (such as a clamp) clamps the support ear to send the cerclage body into the vagina, and makes it in contact with the position where the cervix needs to be cerclaged, and then the sharp teeth on the inner side of the cerclage body are passed through the tissue of the cervix by the instrument, so as to be tied on the cervix. After all the cerclage bodies are put in place, the surgical thread is passed through the connecting holes on each cerclage body in turn and tightened inward, and the cervix will be squeezed and deformed under the action of each cerclage body to complete the cerclage; the split design makes the cervical cerclage device more applicable, and the sheet-like structure can also increase the force-bearing area to reduce tension and avoid tissue cutting.

[0017] 2. A cervical cerclage device of the utility model specifically divides the sheet-like cerclage body into two parts, namely a first clamp body and a second clamp body which are pivotally connected. When in use, the sharp teeth are also made to pass through the tissue of the cervix. However, the arc sections between the sharp teeth and the lugs on the first clamp body and the second clamp body can be further made to face each other. Then, the two arc sections will not completely fit the cervix, thus forming a gap that can accommodate the cervical muscle tissue to ensure a good blood supply to the cervical tissue and prevent necrosis. In addition, the structure of the first clamp body and the second clamp body is more convenient to operate, and the first clamp body and the second clamp body can be controlled by an instrument to rotate and open to a required angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a cervical cerclage device according to an embodiment (lateral view);

[0019] Figure 2 It is a structural schematic diagram of a cervical cerclage device according to another feasible embodiment (lateral view);

[0020] Figure 3 A diagram of a cervical cerclage device in use (before tightening) according to an embodiment;

[0021] Figure 4 This is a use effect diagram of a cervical cerclage device of an embodiment (after tightening);

[0022] Among them, there are a cerclage body 1, a first clamp body 101, a second clamp body 102, an ear plate 103, a lug 104, a rotating shaft 105, sharp teeth 2, a cervix 3, and an operation line 4. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0024] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when used, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] See also Figure 1-Figure 4 A cervical cerclage device of a specific embodiment includes a plurality of sheet-shaped cerclage bodies 1, wherein the outer surface of the cerclage body 1 is provided with a support ear, and the support ear is penetrated with a connecting hole for the surgical thread 4 to pass through, and the axial direction of the connecting hole is consistent with the length direction of the cerclage body 1; a plurality of sharp teeth 2 are protruded on the inner side surface of the cerclage body 1, and the cerclage body 1 can be bent toward the side where the inner side surface is located to form an arc shape;

[0027] Each cerclage body 1 is used to be arranged at intervals in the circumference of the cervix 3 so that the inner side of the cerclage body 1 is in contact with the cervix 3 and the sharp teeth 2 pass through the cervix 3. The surgical thread 4 passes through the connecting holes on the corresponding ears in turn and is tightened so that each cerclage body 1 is tightened inward to complete the cerclage.

[0028] A cervical cerclage device of the embodiment, compared with the existing structure of a cerclage ring or a band, is designed in a split type to be a plurality of sheet-like cerclage bodies, a plurality of sharp teeth are arranged on the inner side surface in contact with the cervix 3, and a support ear with a connecting hole is arranged on the outer side surface; in this way, an instrument (such as a clamp) clamps the support ear to send the cerclage body 1 into the vagina, and contacts the position of the cervix 3 where the cervix 3 needs to be cerclaged, and then the sharp teeth 2 on the inner side surface of the cerclage body 1 are passed through the tissue of the cervix 3 through the instrument, so as to be tied on the cervix. After all the cerclage bodies 1 are placed in place, the surgical thread 4 is passed through the connecting holes on each cerclage body 1 in turn and tightened inward, and the cervix 3 is squeezed and deformed under the action of each cerclage body 1 to complete the cerclage; the split design makes the cervical cerclage device more applicable, and the sheet-like structure can also increase the force-bearing area to reduce tension and avoid tissue cutting.

[0029] During implementation, if the number of cerclage bodies 1 is too large so that the inner diameter of the circular ring formed by the cerclage bodies 1 is larger than the cervix 3, the cerclage effect cannot be achieved; therefore, the number of the cerclage bodies 1 should be determined according to the size of the patient's cervix 3, so that after each cerclage body 1 is inserted on the cervix 3 at intervals and tightened inwards, the effect of cervical cerclage can be achieved.

[0030] Please continue to see Figure 1 and Figure 2 , wherein the cerclage body 1 comprises a first clamp body 101 and a second clamp body 102, the first clamp body 101 and the second clamp body 102 are curved in opposite arcs, sharp teeth 2 are arranged on the opposite inner sides of the first clamp body 101 and the second clamp body 102, and the sharp teeth 2 on the first clamp body 101 and the second clamp body 102 are arranged alternately;

[0031] A plurality of pointed teeth 2 are located at the tail of the first clamp body 101 and the second clamp body 102. An ear plate 103 is extended from the head of the first clamp body 101 and the second clamp body 102. A plurality of lugs 104 are staggeredly arranged on the opposite surfaces of the two ear plates 103. The first clamp body 101 and the second clamp body 102 can pivot around an axis perpendicular to the lugs 104.

[0032] Through holes are vertically opened on the two ear plates 103 to form the connection holes.

[0033] In this way, the sheet-like cerclage body 1 is further divided into two parts, namely, the first clamp body 101 and the second clamp body 102, which are pivotally connected. When in use, the sharp teeth 2 are also made to pass through the tissue of the cervix 3. However, the arc segments between the sharp teeth 2 and the lugs 104 on the first clamp body 101 and the second clamp body 102 can be made to face each other. Then, the two arc segments will not completely fit with the cervix 3, and a gap that can accommodate the cervical muscle tissue will be formed to ensure a good blood supply to the cervical tissue and prevent necrosis. Of course, the aforementioned sheet-like cerclage body 1 can also ensure a good blood supply to the cervix 3, and it is only necessary to make the cerclage body 1 not completely fit with the cervix 3; it is just that the structure of the first clamp body 101 and the second clamp body 102 is more convenient to operate, and the first clamp body 101 and the second clamp body 102 can be controlled by an instrument to rotate and open to the required angle.

[0034] In this embodiment, two structures are provided for the cerclage body 1, which can be Figure 1 The two opposite S-shapes shown can also be Figure 2 The two opposite C-shapes shown have an arc in the middle that bends toward the inner side, so that a gap for accommodating cervical muscle tissue can be formed between the first clamp body 101 and the second clamp body 102 . Figure 1 The free ends of the first clamp body 101 and the second clamp body 102 near the sharp teeth 2 have an extension section bent outward, so that the cervical muscle tissue can be more easily inserted into the gap; and the design is Figure 2 In the structure, since the corresponding free end has an extension section that continues to bend toward the inner side, after the sharp teeth 2 pass through the cervical muscle tissue, the first clamp body 101 and the second clamp body 102 can clamp it tighter; both structures can ensure good blood supply to the cervical tissue and prevent necrosis.

[0035] Among them, the two ear plates 103 are provided with an elastic member and a rotating shaft 105 between the lugs 104, a through hole is vertically opened on the lug 104, the rotating shaft 105 passes through the through hole on the lug 104, and the elastic member is elastically connected to the rotating shaft 105 so that the first clamp body 101 and the second clamp body 102 can pivot around the rotating shaft 105.

[0036] During implementation, the elastic member is a spring, and two lugs 104 are arranged on the ear plates 103 of the first clamp body 101 and the second clamp body 102 at intervals, and the relative lugs 104 on the first clamp body 101 and the second clamp body 102 are staggered, and the spring is located in the middle of the lug 104. The rotating shaft 105 rotates through the lug 104, the spring and the lug 104 at the other end in turn to pivot the first clamp body 101 and the second clamp body 102 into one. The provision of the elastic member can enable the entire cerclage body 1 to better bind the cervix.

[0037] The first clamp body 101 and the second clamp body 102 each have at least two sharp teeth 2 on the inner side surface of the tail portion, wherein the two sharp teeth 2 are spaced apart at two ends of the inner side surface thereof along the axial direction of the lug 104 .

[0038] During implementation, the two sharp teeth 2 are respectively located at the two ends of the first clamp body 101 or the second clamp body 102 in the length direction, thereby achieving the purpose of reducing trauma and ensuring that the cerclage body 1 can bind the cervix 3 .

[0039] Among them, see Figure 3 and Figure 4 The number of the cerclage bodies 1 is four.

[0040] During implementation, four cerclage bodies 1 are used to cerclage the cervix 3 at the directions of three o'clock, six o'clock, nine o'clock and twelve o'clock respectively.

[0041] The first clamping body 101 , the second clamping body 102 , and the elastic member are all made of metal.

[0042] Hard metal material can better ensure that the sharp teeth 2 pass through the tissue of the cervix 3. During implementation, titanium alloy is used.

[0043] When disassembling a cervical cerclage device of this embodiment, the surgical thread 4 is cut, and then a sterilized clamp is inserted into the vagina to open the first clamp body 101 and the second clamp body 102 outward to remove them from the cervix 3, thereby completing the removal of each cerclage body 1; it can be understood that the wound caused by each sharp tooth 2 passing through the cervical tissue can heal itself, and will not cause tissue cutting like the surgical thread, and from Figure 4 It can be seen that the surgical thread 4 passing through the connecting hole of the cerclage body will not directly contact the cervical tissue. Of course, the width of the cerclage body 1 (or the width of the first clamp body 101 and the second clamp body 102) is smaller than the length of the cervix 3.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cervical cerclage device, characterized in that: The invention comprises a plurality of sheet-shaped cerclage bodies, wherein the outer surface of the cerclage body is provided with a support ear, and the support ear is provided with a connecting hole through which the surgical thread passes, and the axial direction of the connecting hole is consistent with the length direction of the cerclage body; the inner side surface of the cerclage body is provided with a plurality of sharp teeth, and the cerclage body can be bent toward the side where the inner side surface is located to form an arc shape; Each cerclage body is used to be arranged at intervals in the circumference of the cervix so that the inner side of the cerclage body is in contact with the cervix and the sharp teeth pass through the cervix. The surgical thread passes through the connecting holes on the corresponding ears in turn and is tightened so that each cerclage body is tightened inward to complete the cerclage.

2. A cervical cerclage device according to claim 1, characterized in that: The cerclage body comprises a first clamp body and a second clamp body, the first clamp body and the second clamp body are curved in opposite arcs, the first clamp body and the second clamp body are provided with sharp teeth on the opposite inner sides, and the sharp teeth on the first clamp body and the second clamp body are arranged in a staggered manner; A plurality of sharp teeth are located at the tail of the first clamp body and the second clamp body, an ear plate is extended from the head of the first clamp body and the second clamp body, a plurality of lugs are staggeredly arranged on the opposite surfaces of the two ear plates, and the first clamp body and the second clamp body are rotatably connected through the lugs; Through holes are vertically opened on the two ear plates to form the connecting holes.

3. A cervical cerclage device according to claim 2, characterized in that: An elastic member and a rotating shaft are provided between the two ear plates, a through hole is vertically opened on the lug, the rotating shaft passes through the through hole on the lug, and the elastic member is elastically connected to the rotating shaft so that the first clamp body and the second clamp body can automatically rotate around the rotating shaft towards each other.

4. A cervical cerclage device according to claim 2, characterized in that: The first clamp body and the second clamp body each have at least two sharp teeth on the inner side surface of the tail portion, wherein the two sharp teeth are spaced apart at two ends of the inner side surface along the axial direction of the lug.

5. A cervical cerclage device according to claim 1, characterized in that: The number of the cerclage bodies is four.

6. A cervical cerclage device according to claim 3, characterized in that: The first clamping body, the second clamping body and the elastic member are all made of metal materials.

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