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CN-122006083-A - Portable urethral stricture dilator suitable for urology surgery

CN122006083ACN 122006083 ACN122006083 ACN 122006083ACN-122006083-A

Abstract

The invention relates to the technical field of medical appliances and discloses a portable urethral stricture dilator suitable for urinary surgery, which comprises a handle, a joint pipe connected to one end of the handle, an elastic expansion framework arranged at one end of the joint pipe far away from the handle, and an elastic sheath coated outside the elastic expansion framework, wherein a driving and adjusting mechanism is arranged inside the handle, a traction rope sequentially penetrating through the joint pipe and the inside of the elastic expansion framework is connected to the driving and adjusting mechanism, and the tail end of the traction rope is fixed at one end of the elastic expansion framework far away from the joint pipe. The flexible implantation advantage of the balloon dilator and the rigid support advantage of the hard dilator are successfully combined through the clearance fit structure of the multisection serial Guan Jieguan and the truncated cone-shaped connecting disc, and the relative swing between the joint tubes can conform to the physiological bending of the urethra like a catheter in the insertion stage.

Inventors

  • ZHANG ZHIJIA
  • SANG YANXIA

Assignees

  • 山西省人民医院

Dates

Publication Date
20260512
Application Date
20260323

Claims (10)

  1. 1. The portable urethral stricture dilator suitable for urinary surgery is characterized by comprising a handle (1), an articulated tube (2) connected to one end of the handle (1), an elastic expansion framework (3) arranged at one end, far away from the handle (1), of the Guan Jieguan (2), and an elastic sheath (4) coated outside the elastic expansion framework (3); a driving and adjusting mechanism is arranged in the handle (1), a traction rope (7) sequentially penetrating through the joint pipe (2) and the elastic expansion framework (3) is connected to the driving and adjusting mechanism, and the tail end of the traction rope (7) is fixed at one end, far away from the joint pipe (2), of the elastic expansion framework (3); the driving and adjusting mechanism winds the traction rope (7) to force the elastic expansion framework (3) to axially compress and synchronously radially expand.
  2. 2. The portable urethral stricture dilator suitable for urinary surgery according to claim 1, wherein the number of the joint tubes (2) is multiple, the joint tubes (2) are sequentially arranged in series end to end along the axial direction, and the joint tubes (2) except the joint tubes (2) directly connected with the handle (1) are fixedly provided with a connecting disc (5) at one end of the joint tube (2) close to the handle (1) and one end of the elastic expansion framework (3) close to the handle (1).
  3. 3. The portable urethral stricture dilator suitable for urinary surgery according to claim 2, wherein one end of each joint tube (2) far away from the handle (1) is provided with a concave disc opening (8), the outer contour of each joint disc (5) is in a round table shape and is adaptively inserted into the concave disc opening (8) of the adjacent component, and a gap is reserved between the outer wall of each joint disc (5) and the inner wall of the concave disc opening (8) when the traction rope (7) is in a loose state.
  4. 4. A portable urinary tract stricture dilator adapted for use in urinary surgery according to claim 1, wherein the drive adjustment mechanism comprises: a bracket (12) fixedly connected to the inner wall of the handle (1); A wind-up roller (9) rotatably connected to the bracket (12), wherein one end of the traction rope (7) is wound and fixed on the wind-up roller (9); and the driving plate (10) is coaxially and fixedly connected with the winding roller (9), and the driving plate (10) is positioned outside the handle (1).
  5. 5. A portable urinary tract stricture dilator adapted for use in urinary surgery according to claim 4 further comprising a one-way locking assembly comprising: A ratchet wheel (11) coaxially and fixedly arranged at one side of the wind-up roller (9); A pawl (13) hinged on the bracket (12) is used for being clamped into a tooth socket of the ratchet wheel (11) to limit the reverse rotation of the wind-up roller (9); A torsion spring (14) arranged at the hinge joint of the pawl (13) and the bracket (12) and used for applying torque for keeping the pawl (13) in the meshing trend with the ratchet wheel (11).
  6. 6. A portable urinary surgery-adapted urethral stricture dilator according to claim 5, further comprising an unlocking reset assembly comprising: a pull ring (16) movably arranged on the outer wall of the handle (1); One end of the pull rope (15) is connected with the pull ring (16), and the other end of the pull rope (15) penetrates into the handle (1) and is connected with one end, far away from the hinge shaft, of the pawl (13).
  7. 7. A portable urinary tract stricture dilator suitable for use in urinary surgery according to claim 3, wherein the engagement disc (5) at one end of one of the joint tubes (2) is optionally inclined, and the recess (8) at one end of one of the joint tubes (2) close to the inclined engagement disc (5) is optionally inclined.
  8. 8. A portable urethral stricture dilator suitable for urinary surgery according to claim 1, characterized in that a return spring (6) is coaxially arranged inside the elastic dilating frames (3), and two ends of the return spring (6) are respectively abutted between two ends of the elastic dilating frames (3) and used for providing a restoring force for axially elongating the elastic dilating frames (3) when the tension of the traction rope (7) is released.
  9. 9. The portable urethral stricture dilator suitable for urology surgery according to claim 5, wherein the ratchet wheel (11) and the driving plate (10) are respectively positioned at two sides of the wind-up roller (9) along the axial direction, and two ends of the wind-up roller (9) are respectively rotatably supported on the bracket (12) through bearings or rotating shafts.
  10. 10. A portable urinary tract stenosis dilator according to claim 3, wherein the distal end of the elastic sheath (4) is closed, the proximal end is closed and secured to the junction of the engagement disc (5) of the elastic dilating former (3) near the end of the handle (1) and the recessed disc orifice (8) of the adjacent joint tube (2).

Description

Portable urethral stricture dilator suitable for urology surgery Technical Field The invention relates to the technical field of medical appliances, in particular to a portable urethral stricture dilator suitable for urinary surgery. Background Urethral stricture is a common disease of urinary surgery, and is mainly characterized by the fact that the diameter of a urethral lumen is reduced, so that urination difficulty, urinary retention and even kidney function damage are caused, and one of the main treatment means aiming at the disease clinically is to perform urethral dilatation operation, and the diameter of a stricture part is enlarged by a physical way so as to restore the patency of the urethra. At present, the commonly used urethral dilatation devices in clinic are mainly divided into two major categories, namely a hard metal dilator (such as a urethral probe) and a high-pressure saccule dilating catheter. The hard metal dilator is usually made of stainless steel, has a definite bending shape and high structural rigidity, and has the advantages of being capable of providing strong radial expansion force and having good tearing and dilating effects on severely fibrous and hard scar narrow tissues. However, the male urethra anatomy is complex, there are two physiological bends, pubic hypomenorrhea and pubic antepubic bending, and the individual differences are large. The hard dilator can not dynamically change the shape in the inserting process so as to adapt to the specific urethral shape of a patient, the operation is extremely dependent on the hand feeling and experience of doctors, and the urethral mucosa is extremely damaged by a little carelessness, so that bleeding and infection are caused, and even serious complications such as pseudomorphic passage formation, rectal perforation and the like are caused. In addition, when the hard dilator is used, a plurality of probes with different types are needed to be replaced from thin to thick in sequence for gradual expansion, and repeated insertion and extraction not only increases the operation time, but also aggravates mechanical friction damage to the inner wall of the urethra and aggravates the pain of patients. In order to solve the trafficability problem of the hard dilator, high pressure balloon dilation catheters have been developed. Such devices utilize flexible catheters to deliver a folded balloon to a stenotic site, and expansion is accomplished by injecting water into the balloon under pressure. Although the flexible nature makes the insertion process relatively safe and less damaging to the mucosa, the balloon tends to appear gourd-like due to compression deformation when faced with hard, old scars, resulting in insufficient effective expansion force, insufficient stent-ring opening, and even balloon rupture due to excessive compression. Meanwhile, the balloon dilator lacks a rigid support of a mechanical structure, the control of the expansion diameter mainly depends on fluid pressure conversion, visual mechanical feedback is lacking, and if the balloon is not completely retracted during withdrawal, the loose balloon wall is easy to clip or scrape the urethra during withdrawal. In view of the above, there is a difficult-to-compromise between the safety of flexible placement and the effectiveness of rigid expansion in the existing urethral dilation techniques, and there is a clinical need for a dilation device that is both as compliant as a catheter through physiological bending and provides a strong and controllable mechanical support force as a metal probe after in place. Disclosure of Invention In view of the shortcomings of the prior art, the present invention provides a portable urethral stricture dilator suitable for urology surgery, solving the problems mentioned in the background art. The portable urethral stricture dilator comprises a handle, a joint pipe connected to one end of the handle, an elastic expansion framework arranged at one end of the joint pipe far away from the handle, and an elastic sheath coated outside the elastic expansion framework; the handle is internally provided with a driving and adjusting mechanism, the driving and adjusting mechanism is connected with a traction rope which sequentially penetrates through the joint pipe and the elastic expansion framework, and the tail end of the traction rope is fixed at one end of the elastic expansion framework, which is far away from the joint pipe; the driving and adjusting mechanism winds the traction rope, so that the elastic expansion framework is forced to be compressed along the axial direction and expanded along the radial direction synchronously. Preferably, the number of the joint pipes is multiple, the joint pipes are sequentially connected in series end to end along the axial direction, and the joint pipes except the joint pipe directly connected with the handle are fixedly provided with a connecting disc at one end of the joint pipe close to the handle an