Suspension device with stable suspension force value

Abstract

The utility model relates to the technical field of medical instruments, in particular to a suspension device with stable suspension force value, which comprises a casing, a conveying mechanism and a shearing mechanism, the conveying mechanism comprises a needle seat and a needle tube, a constant-force spring and a wire seat are fixedly arranged on the needle seat, and the constant-force spring and the wire seat are arranged on the casing. A suture line released by the line seat penetrates through the line protecting pipe fixedly connected with the line seat, and the other end of the suture line is connected with the far-end anchor. The utility model aims to provide a constant force with a smaller fluctuation range through the constant-force spring all the time, so that the suspension force value is the same regardless of the thickness of the prostate, the consistency of clinical treatment effects is better, the risk that a suture and a near-end anchor are disconnected is reduced, and the problem that the treatment effect of a small gland is poor is solved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, it relates to a suspension device with stable suspension force. Background Technology

[0002] Benign prostatic hyperplasia (BPH) is one of the most common medical conditions affecting men, especially older men. The prostate gland enlarges throughout a man's life. In some men, the prostatic capsule surrounding the prostate may prevent further enlargement, causing the internal areas of the prostate to compress the urethra. This pressure in the urethra increases resistance to urine flow through the area of ​​the urethra surrounded by the prostate. Therefore, the bladder must exert greater pressure to force urine through this increased urethral resistance. Chronic overuse can cause the bladder's muscular walls to remodel and harden. This increased urethral resistance and urine flow hardening, along with bladder wall hypertrophy, can lead to a variety of lower urinary tract symptoms (LUTS), which can significantly reduce a patient's quality of life. These symptoms include a weak or intermittent urine flow during urination, straining during urination, hesitation before urination begins, a feeling of incomplete bladder emptying even after urination, dribbling or leakage at the end of urination, increased frequency of urination, especially at night, and urinary urgency. Besides patients with benign prostatic hyperplasia (BPH), urinary tract infections (LUTS) can also occur in patients with prostate cancer, prostate infections, and those using certain medications long-term (such as ephedrine, pseudoephedrine, phenylpropanolamine, antihistamines like diphenhydramine and chlorpheniramine), which can cause urinary retention. Although BPH is rarely life-threatening, it can lead to a number of clinical conditions, including urinary retention, renal insufficiency, recurrent urinary tract infections, incontinence, hematuria, and bladder stones.

[0003] Currently, minimally invasive surgical procedures used to treat BPH symptoms include transurethral microwave thermotherapy (TUMT), transurethral needle ablation (TUNA), interstitial laser coagulation (ILC), and prostate stents. Prostate suspension surgery is a minimally invasive procedure that uses a transurethral implanted device to dilate the obstructed prostatic urethra. Its principle is to implant a miniature urethral suspension device to suspend and compress the enlarged, obstructed lateral lobe of the prostate, thereby dilating the obstructed prostatic urethra and improving the patient's obstructive symptoms.

[0004] Its shortcomings are as follows: Existing prostate suspension devices compress the enlarged prostate, and their effectiveness mainly depends on the force F of the compression or tension spring in the device (F = kx, where k represents the elastic coefficient of the compression or tension spring, which remains unchanged after the spring is selected, and x represents the compression or tension distance). When the prostate is thicker, the compression or tension spring is compressed or stretched a greater distance, which can provide a larger suspension force. At the same time, the sutures are also under greater stress, which will increase the risk of suture breakage from the proximal anchor, i.e., increase the risk of treatment failure. When the prostate is thinner, the compression or tension spring is compressed or stretched a smaller distance, the suspension force provided by the device is smaller, the compression effect on the prostate is poor, i.e., the treatment effect is not good.

[0005] This invention uses a constant force spring, which can solve the above-mentioned clinical pain points. Because the constant force spring always provides a constant force with a small fluctuation range, the suspension force is the same regardless of the thickness of the prostate, resulting in better consistency of clinical treatment effects, reducing the risk of suture breakage from the proximal anchor, and reducing the problem of poor treatment effect for small glands. Utility Model Content

[0006] To address the issues of unstable prostate suspension pressure leading to poor treatment outcomes and high risks, the present invention aims to provide a suspension device with stable suspension force. By using a constant force spring, a constant force with a small fluctuation range is consistently provided, ensuring that the suspension force remains the same regardless of prostate thickness. This results in better consistency in clinical treatment outcomes, reduces the risk of suture breakage from proximal anchoring, and mitigates the problem of poor treatment outcomes in small prostate tissues.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a suspension device with stable suspension force, comprising a housing, a conveying mechanism, and a shearing mechanism.

[0008] The delivery mechanism includes a needle holder movable within a housing and a needle tube fixed to the end of the needle holder. A constant force spring and a suture holder slidable within the needle holder are fixedly mounted on the needle holder, and the suture holder is connected to the constant force spring. The suture released from the suture holder passes through a suture protector fixedly connected to the suture holder. The other end of the suture is connected to a distal anchor. The suture protector, the suture, and the distal anchor are all disposed within the needle tube, and the distal anchor is positioned at the end of the needle tube.

[0009] The needle holder is wider on the left and narrower on the right. The middle part of the housing is provided with a stop elastic stop for the needle holder, which can be compressed by the left wide part of the needle holder.

[0010] Preferably, the elastic stop includes a fixing groove, a compression spring and a retaining ring disposed in the fixing groove, and an elastic pin with a retaining groove, wherein the retaining groove of the elastic pin cooperates with the retaining ring for fixation.

[0011] More preferably, the shearing mechanism includes an anchoring component, a cutting component, a tension spring, and a pulling rod. The anchoring component includes a push block connected to the right end of the tension spring, a push rod connected to the push block at one end, a proximal anchor detachably connected to the other end of the push rod, and a shearing lock for movably fixing the push block. The push block can move left and right in the housing.

[0012] More preferably, the cutting component includes a shear seat connected to the left end of the tension spring, a shear groove connected to the shear seat at one end, the left end of the pull rod movably abutting against the shear seat, the shear seat being movable left and right in the housing, the push rod and the proximal anchor both being disposed in the inner cavity of the shear groove, the shear groove being provided with a tangent blade, and the proximal anchor being disposed at the left end of the tangent blade.

[0013] More preferably, both the pull rod and the shear lock are provided with a rotating shaft and a corresponding shaft groove is provided in the housing.

[0014] More preferably, both the shearing groove and the needle tube are disposed inside the support member, the support member is fixedly connected to the housing, and the head end of the support member is provided with an opening.

[0015] The working principle of this utility model:

[0016] 1. Under the action of external force, the needle seat is pushed to the left, thereby pushing the constant force spring, suture seat, suture tube, suture, distal anchor and needle tube to move forward and to the left together. Under the action of the cutting edge of the left end of the needle tube, the distal anchor and the left end of the needle tube move to the outside of the prostate.

[0017] 2. When the needle holder is pushed to the right under the action of external force, the needle tube and constant force spring move to the right. At this time, the suture holder is limited by the elastic pin and cannot move backward with the needle holder. As a result, the suture holder, suture tube, suture and distal anchor do not move. The distal anchor and part of the suture are transmitted from the left end of the needle tube.

[0018] 3. Continue until the wide part of the left end of the needle seat presses against the locking head on the elastic pin, and drives the elastic pin to retract inward and away from the suture seat. The suture seat moves to the right under the action of the constant force spring. At this time, under the action of the suture, the distal end is pulled and anchored to fit against the outside of the prostate. The suture seat assists in releasing the suture, and the suture maintains a constant tension until the suture seat stops moving.

[0019] 4. Move the shear lock to release its stop on the push block. On one hand, the push block, under the action of the tension spring, pushes the proximal anchor to adhere to and lock onto the suture on the inside of the prostate. On the other hand, as the push block pushes the pull rod to rotate, it causes the left end of the pull rod to be misaligned with the shear seat. Under the action of the tension spring, the shear seat pulls the suture cutting groove to move to the right. During the rightward movement, the cutting blade cuts the suture. At this point, the prostate is compressed, completing a single prostate suspension.

[0020] In summary, this utility model has the following beneficial effects: by providing a constant force with a small fluctuation range through a constant force spring, and in conjunction with the suture placement of the suture holder, it ensures that the suspension force is the same regardless of the thickness of the prostate, resulting in better consistency of clinical treatment effects, reducing the risk of suture breakage from the proximal anchor, and reducing the problem of poor treatment effects for small glands. Attached Figure Description

[0021] Figure 1 This is an exploded view of the present invention;

[0022] Figure 2 for Figure 1 Partial view of A in the middle;

[0023] Figure 3 for Figure 1 Partial view of B in the middle;

[0024] Figure 4 for Figure 1 Partial view of C;

[0025] Figure 5 This is a schematic diagram showing the tip of the device placed on one side of the prostate.

[0026] Figure 6 This is a diagram illustrating prostate puncture.

[0027] Figure 7 This is a schematic diagram of the remote anchoring release.

[0028] Figure 8 for Figure 7 Partial view of D in the middle;

[0029] Figure 9 This is a schematic diagram of the near-end anchoring release.

[0030] Figure 10 for Figure 9 Partial view of E in the middle;

[0031] In the diagram: 1. Housing; 2. Needle holder; 3. Needle tube; 4. Constant force spring; 5. Thread holder; 6. Thread; 7. Thread sheath; 8. Distal anchor; 9. Fixing groove; 10. Compression spring; 11. Retaining ring; 12. Elastic pin; 12-1. Slot; 12-2. Clip; 13. Tension spring; 14. Pull rod; 15. Push block; 16. Push rod; 17. Proximal anchor; 18. Cut-off lock; 19. Cut-off seat; 20. Cut-off groove; 20-1. Cutting blade; 21. Rotating shaft; 22. Shaft groove; 23. Support; 23-1. Opening. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model, and are not intended to indicate or explicitly state that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or explicitly suggesting relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] See details Figure 1-10 A suspension device with stable suspension force includes a housing 1, a conveying mechanism, and a shearing mechanism.

[0037] The delivery mechanism includes a needle holder 2 that can move within the housing 1 and a needle tube 3 fixed to the end of the needle holder 2. A constant force spring 4 and a suture holder 5 that can slide within the needle holder 2 are fixedly mounted on the needle holder 2, and the suture holder 5 is connected to the constant force spring 4. The suture 6 released from the suture holder 5 passes through a suture protector tube 7 that is fixedly connected to the suture holder 5. The other end of the suture 6 is connected to a distal anchor 8. The suture protector tube 7, the suture 6, and the distal anchor 8 are all located within the needle tube 3, and the distal anchor 8 is positioned at the end of the needle tube 3.

[0038] The needle holder 2 is wider on the left and narrower on the right. The housing 1 has a stop elastic stop for the wire holder 5 in the middle, and it can be compressed by the left wide part of the needle holder 2.

[0039] Specifically, the elastic stop includes a fixing groove 9, a compression spring 10 and a retaining ring 11 disposed in the fixing groove 9, and an elastic pin 12 with a retaining groove 12-1, wherein the retaining groove 12-1 of the elastic pin 12 cooperates with the retaining ring 11 for fixation.

[0040] Specifically, the shearing mechanism includes an anchor feeding component, a cutting component, a tension spring 13, and a pull rod 14. The anchor feeding component includes a push block 15 connected to the right end of the tension spring 13, a push rod 16 connected to the push block 15 at one end, a proximal anchor 17 detachably connected to the other end of the push rod 16, and a shearing lock 18 for movably fixing the push block 15. The push block 15 can move left and right in the housing 1.

[0041] Specifically, the cutting component includes a shear seat 19 connected to the left end of the tension spring 13, a shear groove 20 connected to the shear seat 19 at one end, the left end of the pull rod 14 movably abutting against the shear seat 19, the shear seat 19 being able to move left and right in the housing 1, the push rod 16 and the proximal anchor 17 being both located in the inner cavity of the shear groove 20, the shear groove 20 being provided with a tangent blade 20-1, and the proximal anchor 17 being located at the left end of the tangent blade 20-1.

[0042] Specifically, both the lever 14 and the shear lock 18 are equipped with a rotating shaft 21 and have a corresponding shaft groove 22 inside the housing 1.

[0043] Specifically, the cutting groove 20 and the needle tube 3 are both located inside the support member 23. The support member 23 is fixedly connected to the housing 1, and the head end of the support member 23 is provided with an opening 23-1.

[0044] The operating principle of this embodiment:

[0045] 1. Under the action of external force, the needle seat 2 is pushed to the left, thereby pushing the constant force spring 4, the suture seat 5, the suture tube 7, the suture 6, the distal anchor 8 and the needle tube 3 to move forward and to the left together. Under the action of the cutting edge of the left end of the needle tube 3, the distal anchor 8 and the left end of the needle tube 3 move to the outside of the prostate.

[0046] 2. Under the action of external force, push the needle holder 2 to the right, which will drive the needle tube 3 and the constant force spring 4 to move to the right. At this time, because the thread holder 5 is limited by the elastic pin 12 and cannot move backward with the needle holder 2, the thread holder 5, the thread tube 7, the suture 6 and the distal anchor 8 do not move. The distal anchor 8 and part of the suture 6 are transmitted from the left end of the needle tube 3.

[0047] 3. Until the wide part of the left end of the needle seat 2 squeezes the locking head 12-2 on the elastic pin, and drives the elastic pin 12 to retract inward and away from the suture seat 5. The suture seat 5 moves to the right under the action of the constant force spring 4. At this time, under the action of the suture 6, the distal anchor 8 is pulled to fit against the outside of the prostate. The suture seat 5 assists in releasing the suture 6, and the suture 6 maintains a constant tension until the suture seat 5 stops moving.

[0048] 4. Move the shear lock 18 to release its stop on the push block 15. On the one hand, the push block 15, under the action of the tension spring 13, pushes the proximal anchor 17 to adhere to the inside of the prostate and lock onto the suture 6. On the other hand, as the push block 15 pushes the pull rod 14 to rotate, it causes the left end of the pull rod 14 to be misaligned with the shear seat 19. Under the action of the tension spring 13, the shear seat 19 pulls the suture groove to move to the right. The suture cutting blade 20-1 cuts the suture 6 during the rightward movement. At this point, the prostate is compressed, completing a single prostate suspension.

[0049] In summary, this embodiment has the following beneficial effects: the constant force spring 4 provides a constant force with a small fluctuation range, and the suture release of the suture seat 5 ensures that the suspension force is the same regardless of the thickness of the prostate, resulting in better consistency of clinical treatment effects, reducing the risk of the suture 6 breaking off from the proximal anchor 17, and reducing the problem of poor treatment effect for small glands.

[0050] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A suspension device with stable suspension force, characterized in that, Includes a housing, a conveying mechanism, and a shearing mechanism. The delivery mechanism includes a needle holder movable within a housing and a needle tube fixed to the end of the needle holder. A constant force spring and a suture holder slidable within the needle holder are fixedly mounted on the needle holder, and the suture holder is connected to the constant force spring. The suture released from the suture holder passes through a suture protector fixedly connected to the suture holder. The other end of the suture is connected to a distal anchor. The suture protector, the suture, and the distal anchor are all disposed within the needle tube, and the distal anchor is positioned at the end of the needle tube. The needle holder is wider on the left and narrower on the right. The middle part of the housing is provided with a stop elastic stop for the needle holder, which can be compressed by the left wide part of the needle holder.

2. The suspension device with stable suspension force as described in claim 1, characterized in that, The elastic stop includes a fixing groove, a compression spring and a retaining ring disposed in the fixing groove, and an elastic pin with a retaining groove, wherein the retaining groove of the elastic pin cooperates with the retaining ring for fixation.

3. The suspension device with stable suspension force as described in claim 1, characterized in that, The shearing mechanism includes an anchor feeding component, a cutting component, a tension spring, and a pulling rod. The anchor feeding component includes a push block connected to the right end of the tension spring, a push rod connected to the push block at one end, a proximal anchor detachably connected to the other end of the push rod, and a shearing lock for movably fixing the push block. The push block can move left and right in the housing.

4. The suspension device with stable suspension force as described in claim 3, characterized in that, The cutting component includes a shear seat connected to the left end of the tension spring, a shear groove connected to the shear seat at one end, the left end of the pull rod movably abutting against the shear seat, the shear seat being movable left and right in the housing, the push rod and the proximal anchor being both disposed in the inner cavity of the shear groove, the shear groove being provided with a tangent blade, and the proximal anchor being disposed at the left end of the tangent blade.

5. The suspension device with stable suspension force as described in claim 4, characterized in that, Both the pull rod and the shearing lock are equipped with a rotating shaft and have corresponding shaft grooves inside the housing.

6. The suspension device with stable suspension force as described in claim 5, characterized in that, Both the shearing groove and the needle tube are disposed inside the support member, the support member is fixedly connected to the housing, and the head end of the support member is provided with an opening.

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