A circular IUD removal hook

Abstract

The present invention discloses a circular IUD removal hook, which mainly relates to the field of gynecological IUD removal. It includes a removal hook, and a deformation part with a length of 3-6 cm is provided at a position 2-5 cm away from the front end of the removal hook. The deformation part includes an elastic support member and a deformation driving member arranged in parallel. The elastic support member is in a straight rod structure and can be deformed into an arc state. An air cavity is provided in the deformation driving member, and a gas source is connected to the air cavity. The deformation driving member can be bent into an arc shape by the driving of the gas source, and the arching direction is consistent with the hooking direction of the removal hook. The beneficial effect of the present invention is that it can avoid the problem of hooking and injuring the easily hooked tissues at the anterior flexion part of the uterine inner wall during the removal of the circular intrauterine device in the anteflexed uterus.

Description

Technical Field

[0001] The present invention relates to the field of instruments for gynecological intrauterine device (IUD) removal, and specifically to a circular IUD removal hook. Background Art

[0002] Since circular IUDs were commonly implanted earlier and the majority of IUD removal cases occur after menopause, circular IUDs are frequently encountered in clinical gynecological IUD removal procedures. Practice has shown that using a removal hook is more effective for this type of IUD. If resistance is encountered, a removal device can be used in combination.

[0003] However, in a retroflexed uterus, since the inner wall of the uterus arches backward, when the hook enters the cervix and pulls the IUD out, it often catches or scratches the arched and curved area of the anterior uterine wall, which may be misjudged as an embedded IUD, resulting in misdiagnosis. Or it may scratch and cause bleeding and intrauterine injury in the above area during the pulling process. Summary of the Invention

[0004] The purpose of the present invention is to provide a circular IUD removal hook that can avoid scratching the easily caught tissues in the anterior flexure part of the inner uterine wall during the removal of a circular IUD in a retroflexed uterus.

[0005] To achieve the above object, the present invention is realized through the following technical solutions:

[0006] A circular IUD removal hook includes a removal hook,

[0007] A deformation part with a length of 3 - 6 cm is provided at a position 2 - 5 cm away from the front end of the removal hook.

[0008] The deformation part includes an elastic support member and a deformation driving member arranged in parallel.

[0009] The elastic support member is in a straight rod structure and can be deformed into an arc state.

[0010] The deformation driving member is provided with an air cavity, and a gas source is connected to the air cavity. The deformation driving member can be bent into an arc by the driving of the gas source, and the arching direction is the same as the hooking direction of the removal hook.

[0011] Further, the elastic support member is a metal spring coil, and the initial state of the metal spring coil is in a straight rod shape;

[0012] The deformation driving member is an airbag. The relative positions of both ends of the metal spring coil and both ends of the airbag are fixed. The airbag is provided with an air cavity inside, and the airbag is arranged on the hooking side of the removal hook. After the airbag is inflated, it can be elongated in its length direction, and the elongation of the airbag can force the metal spring coil to adaptively bend into an arc.

[0013] Furthermore, the elastic support member is a sheet-shaped metal strip, and the initial state of the sheet-shaped metal strip is a straight rod shape;

[0014] The deformation driving member includes a flexible sheet and a bellows cover. The relative positions of both ends of the sheet-shaped metal strip and both ends of the flexible sheet are fixed. One side of the bellows cover in its length direction is provided with an opening, and the edge of the opening is fixedly connected in a sealed manner around the flexible sheet. An air cavity is formed between the bellows cover and the flexible sheet, and bellows folds are distributed on the bellows cover.

[0015] Furthermore, it further includes a handle part, a hook rod part, a connecting part, and a hook head part, and the handle part, the hook rod part, the deformation part, the connecting part, and the hook head part are connected in sequence. Both the hook rod part and the connecting part are cylindrical stainless steel straight rods with corresponding diameters. An inflation channel is arranged inside the hook rod part along its length direction. The front end of the inflation channel is used to communicate with the deformation driving member and provide a gas source. The rear end of the inflation channel is communicated with a gas nozzle arranged at the rear end of the hook rod part. A trachea is connected to the gas nozzle, the end of the trachea is connected to a medical gas source, and a gas valve and a gas pump are arranged on the trachea.

[0016] Furthermore, the front end of the elastic support member is connected to the rear end of the connecting part, and the rear end of the elastic support member is connected to the front end of the hook rod part;

[0017] The front end of the deformation driving member is connected to the edge of the connecting part near the rear end, and the rear end of the deformation driving member is connected to the edge of the hook rod part near the front end.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] When using this intrauterine device removal hook, it can avoid scratching the easily hooked tissues at the anterior flexure part of the uterine inner wall during the removal of the round intrauterine device in the anteflexed uterus, greatly improve the situation of bleeding during intrauterine device removal, reduce misjudgment of incarceration, and significantly relieve the discomfort of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 is a schematic diagram of the present invention.

[0021] Attached Figure 2 is the enlarged view of part A of the attached Figure 1 of the present invention.

[0022] Attached Figure 3 is the enlarged view of part B of the attached Figure 1 of the present invention.

[0023] Attached Figure 4 is the enlarged view of part C of the attached Figure 1 of the present invention.

[0024] Attached Figure 5 is the side view of the present invention.

[0025] Appendix Figure 6 is a schematic diagram of the existing clinical operation of the present invention (the position marked P is the position prone to snagging).

[0026] Appendix Figure 7 is a schematic diagram of the steps of the improved clinical operation pipe fitting of the present invention.

[0027] Appendix Figure 8 is a schematic diagram of the deformation part in other example cases of the present invention.

[0028] Reference numerals shown in the drawings:

[0029] 1. Handle part; 2. Hook rod part; 3. Connection part; 4. Hook head part; 5. Metal spring coil; 6. Airbag; 7. Air nozzle; 8. Air pipe; 9. Flexible sheet; 10. Bellows cover. Detailed implementation manners

[0030] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by this application.

[0031] Embodiment 1: This embodiment exemplifies a circular IUD removal hook

[0032] It mainly includes a handle part 1, a hook rod part 2, a deformation part, a connection part 3, and a hook head part 4 that are connected in sequence.

[0033] The handle part 1 is a closed waist-shaped ring structure, which is convenient for operation and holding.

[0034] The hook rod part 2 is a cylindrical stainless steel straight rod, and its rear end is fixedly connected to the front end of the handle part 1.

[0035] At the same time, the connection part 3 is a cylindrical stainless steel straight rod with the same diameter as the hook rod part 2. It is used to connect the hook head part 4 and the deformation part. The hook head part 4 is a metal hook, and the hook shape of the hook head adopts the common hook head size and shape in the existing clinic. And the end of the hook head is a bifurcated double-hook structure.

[0036] The deformation part is composed of an elastic support member and a deformation driving member. In this example, the elastic support member is a metal spring coil 5, and the deformation driving member is an airbag 6.

[0037] The metal spring coil 5 is as Figure 1As shown, its rear end is fixedly connected to the front end of the hook rod part 2, its front end is fixedly connected to the rear end of the connecting part 3, it is equal in length to or slightly longer than the hook head part 4, and the metal spring coil 5 is approximately in the first one-third area of the entire ring removal hook except for the handle part 1 in terms of the length and position of the connecting part 3, so that the ring removal hook can be bent and deformed at a position close to the front end.

[0038] The airbag 6 is arranged in parallel with the metal spring coil 5, and the airbag 6 is arranged on one side surface of the hook head part 4 facing the bending direction. The front end of the airbag 6 is fixed to the rear end edge of the connecting part 3, and the rear end of the airbag 6 is fixed to the front end edge of the hook rod part 2. Thus, the airbag 6 can cover the metal spring coil 5 at both the front and rear ends in terms of length, and when deformed, it can wrap the connecting parts 3 at both ends of the metal spring coil 5 inside the airbag 6 to avoid the appearance of gaps and effectively prevent internal tissues from being pinched during reset.

[0039] An air chamber is provided inside the airbag 6.

[0040] The airbag 6 is made of an anisotropic material with a significant tendency to extend in different directions, so that the airbag 6 can obtain a significant extension and elongation in its length direction after inflation, while the change in the girth direction is not large.

[0041] An inflation channel is provided along the length direction of the hook rod part 2. The front end of the inflation channel is communicated with the airbag 6, the rear end of the inflation channel is arranged at the rear end of the hook rod part 2, and an air nozzle 7 is provided. A trachea 8 is connected to the air nozzle 7, and the trachea 8 is communicated with a medical gas source for inflating or deflating the airbag 6.

[0042] When the airbag 6 is inflated, its length increases. Since its two ends are fixed to the front end and the rear end of the metal spring coil 5, the elongation of the airbag 6 can cause the metal spring coil 5 to bend, and the bent part arches towards the side where the hook head part 4 faces.

[0043] A fixing position for fixing the two is provided at the center of the inner side of the airbag 6 adjacent to the metal spring coil 5 and at the center of the metal spring coil 5 to ensure the cooperation effect of the two components during the deformation process.

[0044] A marking strip consistent with its length direction is provided on the hook rod part 2. The marking strip protrudes as a round convex strip and is arranged at the exact center of the side where the hook head part 4 hooks. It can remind the doctor of the position of the hook head and prevent the loss of the hook head state feeling after the hook enters.

[0045] Next, according to the specific clinical situation and combined with the specific operation method, the ring removal hook of this embodiment will be further explained:

[0046] Although many large top - tier tertiary hospitals are now equipped with advanced electron microscopy and endoscopy technologies, theoretically, the intrauterine device (IUD) removal procedure can be easily and simply carried out under B - ultrasound or hysteroscopy. However, clinically, for ordinary IUD removal procedures, endoscopic techniques are rarely used as an aid, and the operation still relies on the doctor's hand feeling and experience. At the same time, in many primary - level hospitals, due to the lack of advanced equipment, the operation still depends on the doctor's hand feeling. Especially in the small family - planning surgeries in the outpatient department, the IUD removal procedure is basically the most difficult operation because it is basically carried out blindly (due to limited conditions at the primary level, without B - ultrasound guidance). Therefore, for obstetric and gynecological medical staff, the proper use of IUD removal forceps and IUD removal hooks is an essential foundation.

[0047] After years of summarizing practical experience with IUD removal forceps and IUD removal hooks, generally, the IUD removal hook is the first choice for IUD removal. When it is difficult to remove the IUD with the hook, the inserter - extractor is considered. Each has its own advantages and disadvantages. Of course, this is just the inventor's understanding of the IUD removal hook and the inserter - extractor, not a decisive conclusion. Different techniques may result in greatly different advantages and disadvantages of the instruments. In the inventor's experience, the inserter - extractor can not only be used to remove the IUD but also to insert the IUD. Place the upper end of the closed metal IUD into the front groove of this instrument. Most of the time, it is used to remove the IUD. This instrument is about the thickness of a No. 4 dilator and is relatively easy to enter the uterine cavity. However, the inserter - extractor has both advantages and limitations. When entering and exiting the uterine cavity, the damage is relatively small, and it is easier to clamp the tail - thread - detached or coiled - into - the - uterine - cavity TCu, Multiload, etc. However, compared with the IUD removal hook, the hand feeling during IUD removal is not obvious, the sense of the metal of the IUD is relatively dull, and the IUD needs to be placed between the two leaves of this instrument before it can be removed. Although it is easy to enter the uterine cavity during IUD removal, it is necessary to open the two leaves in the uterine cavity of the recipient to find the IUD, which is also very uncomfortable; for an incarcerated IUD, it is not a sharp instrument, and it still has to clamp the IUD and pull it out of the cervical os and cut it off and then pull it out. Generally, this instrument is considered only when the IUD cannot be successfully removed with the IUD removal hook. The IUD removal hook is still the simplest and most convenient IUD removal instrument.

[0048] At present, although with the continuous improvement and development of IUDs, IUDs with tail - threads / without tail - threads, fancy rings, TCu, Multiload, etc. are commonly used IUDs now. However, since most women have given birth when choosing an IUD and give priority to the convenience of long - term non - intervention, the vast majority choose IUDs with a service life of more than 5 years. This has led to the situation that although the use of new - type IUDs is very popular clinically, there are still quite a number of women who used such IUDs before. Many of them come to remove the IUD after menopause. Due to the long time since the IUD was inserted and the age factor, the uterine environment is relatively fragile. For a large number of women undergoing IUD removal, especially those with a flexed uterus, it poses a great challenge to doctors. IUD removal failures and uterine and cervical traumas often occur.

[0049] When performing the IUD removal procedure, first, a thorough bimanual examination must be carefully carried out to clearly determine the specific position of the patient's uterus, whether it is anteflexed or retroflexed, so that the doctor will have a clear idea when inserting the probe and the IUD removal hook later.

[0050] After the probe locates the position of the loop, before inserting the loop hook, check which side the hook is facing. If the uterine cavity is entered upward, insert the hook head 4 upward. The loop hook is very easy to enter the cervix compared to other instruments. After entering, according to the approximate position of the predicted O-shaped IUD detected by the probe, when the loop is felt to be hooked, rotate the loop hook so that the direction of the hook on the hook head 4 is opposite to the direction at the anterior wall of the anteflexed uterus. At the same time, turn on the medical gas source to inflate the airbag 6, causing the deformation part to arch and bend as a whole. The direction of its arch is the same as the direction of the hook and opposite to the direction at the anterior wall of the uterus. (As shown in the attached Figure 7 schematic), this can easily pull down the loop hook. During the pulling process, gradually turn on the air pump to deflate, causing the deformation part to gradually straighten and be pulled out.

[0051] The greatest advantage of this operation is that:

[0052] 1) It will not hook the anteflexed part of the inner wall of the uterus and misjudge it as a loop incarceration, resulting in a misjudgment and a failed loop removal.

[0053] 2) As shown in the A marked area in the attached Figure 6 and 7 , it is the part where the anterior wall of the anteflexed uterus meets the cervical canal. When the direction of the hook is the same as it, it is easy to hook it, causing problems such as intrauterine wounds and bleeding. This is a common situation in removing the loop from an anteflexed uterus and is also a headache for many doctors. Such an operation and cooperation can easily solve it.

[0054] In addition, if it is still difficult to pull down in the above situation, it is estimated to be incarcerated. A small curette can be used to scrape the endometrium at the position of the contraceptive loop and then try to remove the loop again.

[0055] Of course, personally, it is still best to understand the positional relationship between the IUD and the uterine wall by preoperative B-ultrasound, exclude embedding in the muscle layer, and make appropriate cervical preparations according to individual differences (such as removing the device after menopause, those with cervical atrophy), carefully explore the position and shape of the uterine cavity during the operation, and patiently feel the metallic sensation, circular IUD during the operation to be more confident in completing the loop removal. In the use of instruments, personally, I prefer to hook first, and those that are not easy to hook are changed to forceps extraction. The operator must not be impatient.

[0056] Embodiment 2: This embodiment exemplifies a circular IUD removal hook

[0057] It mainly includes a handle part 1, a hook rod part 2, a deformation part, a connecting part 3, and a hook head part 4 connected in sequence.

[0058] The handle portion 1 is a closed waist-shaped ring structure. The hook rod portion 2 is a cylindrical stainless steel straight rod, the rear end of which is fixedly connected to the front end of the handle portion 1. The connecting portion 3 is a cylindrical stainless steel straight rod with the same diameter as the hook rod portion 2. It is used to connect the hook head portion 4 and the deformation portion. The hook head portion 4 is a metal hook, and the hook shape of the hook head applies the size and shape of the hook head commonly used in clinical practice. And the end of the hook head is a forked double hook structure.

[0059] The deformation part is composed of a metal spring ring 5 and a deformation driving part. The rear end of the metal spring ring 5 is fixedly connected to the front end of the hook rod part 2, and its front end is fixedly connected to the rear end of the connecting part 3. It is slightly longer than the hook head part 4. The length and position of the metal spring ring 5 and the connecting part 3 are approximately in the front third of the entire ring removal hook excluding the handle part 1, so that the ring removal hook can bend and deform near the front end.

[0060] The deformation driving member is arranged in parallel with the metal spring ring 5 , and the deformation driving member is arranged on a side surface of the hook head 4 which is bent.

[0061] The hook rod portion 2 is provided with an inflation channel along its length direction, the front end of the inflation channel is connected with the deformation driving member, the rear end of the inflation channel is arranged at the rear end of the hook rod portion 2, and is provided with an air nozzle 7, the air nozzle 7 is connected with an air tube 8, and the air tube 8 is connected with a medical air source for inflating or deflating the deformation driving member.

[0062] The above structure is basically similar to that of Embodiment 1, with the following specific differences:

[0063] The deformation driving member includes a flexible sheet 9 and an accordion cover 10. The flexible sheet 9 is long and slightly elastic, and its front end is fixed to the rear end of the connecting part 3, and the rear end of the flexible sheet 9 is fixed to the front end of the hook rod 2. The flexible sheet 9 uses a silicone rubber sheet, which is easy to disinfect and has good softness. The accordion cover 10 is a long cover body with an opening on one side, and the side of the opening is fixedly sealed and connected to the peripheral side of the flexible sheet 9. The accordion cover 10 is distributed with accordion folds. When inflated, the accordion folds unfold, so that the deformation driving member is bent and deformed with the flexible sheet 9 as the inner side. Drive the metal spring coil 5 to deform.

[0064] The present invention can also provide other examples for the elastic supporting member and the deformation driving member.

[0065] For other implementations of the elastic support member, for example:

[0066] The deformation driving member is an accordion airbag 6, and one of the longer side surfaces thereof is a plane, while the opposite longer side surface is provided with accordion folds, which can also be expanded into an arc shape after being inflated.

[0067] Or other components or structures that can achieve the change of their straight line to arc shape by inflation and deflating.

[0068] For the implementation methods of other structures of the deformation driving member, for example, for the supporting part of the deformed part, and the metal spring coil 5 mentioned in Embodiments 1 and 2, it can also be a sheet-shaped metal spring piece, a plastic spring piece, or other material structures with deformation ability.

[0069] Or other components or structures that are initially in a straight rod shape and can be bent and deformed.

Claims

1. A circular IUD removal hook, including the removal hook, characterized in that, a deformation part with a length of 3 - 6 cm is provided at a position 2 - 5 cm away from the front end of the removal hook. The deformation part includes an elastic support member and a deformation driving member arranged in parallel, the elastic support member is in a straight rod structure and can be deformed into an arc state, an air cavity is provided in the deformation driving member, a gas source is connected to the air cavity, the deformation driving member can be bent into an arc by the drive of the gas source, and the arching direction is the same as the hook direction of the removal hook. It also includes a handle part, a hook rod part, a connecting part, and a hook head part, and the handle part, hook rod part, deformation part, connecting part, and hook head part are connected in sequence. The hook rod part and the connecting part are both cylindrical stainless steel straight rods with corresponding diameters. An inflation channel is provided inside the hook rod part along its length direction. The front end of the inflation channel is used to communicate with the deformation driving member and provide a gas source. The rear end of the inflation channel is communicated with an air nozzle provided at the rear end of the hook rod part. An air tube is connected to the air nozzle, the end of the air tube is connected to a medical gas source, and an air valve and an air pump are provided on the air tube; the deformation driving member is an airbag, the airbag is arranged on one side of the hook direction of the removal hook, and the airbag can be stretched in its length direction after being inflated; In specific application, if it is an upward - entering uterine cavity, insert the hook head upward. After feeling the hook catch the ring, rotate the removal hook to make the hook direction of the hook head opposite to the direction of the anterior wall of the ante - flexed uterus. At the same time, turn on the medical gas source to inflate the airbag, so that the whole deformation part arches and bends, and its arching direction is the same as the hook direction and opposite to the direction of the anterior wall of the uterus. In this way, the removal hook can be pulled down, and gradually turn on the air pump to deflate during the pulling - out process, so that the deformation part gradually straightens and is pulled out.

2. The circular IUD removal hook according to claim 1, characterized in that: the front end of the elastic support member is connected to the rear end of the connecting part, and the rear end of the elastic support member is connected to the front end of the hook rod part; the front end of the deformation driving member is connected to the edge near the rear end of the connecting part, and the rear end of the deformation driving member is connected to the edge near the front end of the hook rod part.

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