WO2022116664A1 - Bendable ureter guide sheath - Google Patents

Bendable ureter guide sheath Download PDF

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Publication number
WO2022116664A1
WO2022116664A1 PCT/CN2021/121633 CN2021121633W WO2022116664A1 WO 2022116664 A1 WO2022116664 A1 WO 2022116664A1 CN 2021121633 W CN2021121633 W CN 2021121633W WO 2022116664 A1 WO2022116664 A1 WO 2022116664A1
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section
bendable
ureteral
sheath
main body
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PCT/CN2021/121633
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French (fr)
Chinese (zh)
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匡仁锐
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匡仁锐
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Publication of WO2022116664A1 publication Critical patent/WO2022116664A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005—Flexible endoscopes
    • A61B1/01—Guiding arrangements therefore
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • A61B18/24—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor with a catheter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • A61B18/26—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor for producing a shock wave, e.g. laser lithotripsy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes

Definitions

  • the utility model relates to the technical field of medical equipment, in particular to a bendable ureteral guide sheath.
  • Flexible ureteroscopic lithotripsy is to use a thin mirror with a diameter of about 3mm, insert it into the ureter through the urethra and bladder, and crush and remove ureteral stones or kidney stones. It uses the human body's natural urinary system cavity without making any incisions on the body. It is a pure urological endoscopic minimally invasive surgery. It is suitable for various ureteral calculi and some renal calculi that are ineffective in conservative treatment. Due to the small trauma, it is gradually replacing the treatment methods such as extracorporeal lithotripsy and percutaneous nephroscopy, and has gradually become the mainstream method.
  • the ureteral introducer sheath is a commonly used consumable for flexible ureteroscopic surgery.
  • the flexible ureteroscope directly enters the surgical area through the ureteral introducer sheath, which can facilitate related operations and is not affected by the bending state and thickness of the ureter and urethra.
  • the main factor affecting the further development of flexible ureteroscopic surgery is the low efficiency of the operation, which can only deal with smaller stones.
  • the main factor that affects the efficiency of the operation is the removal process of stone fragments.
  • the sheath opening of the ureteral introducer sheath can be close to the stone, the efficiency of the operation can be significantly improved.
  • the water flow injected during the operation can flush out the stone fragments from the ureteral introducer sheath, which not only avoids the impact of the stone powder on the visual field, accumulation in the kidneys, etc. that affect the efficiency of the operation, but also avoids natural discharge. Uncertainty of the stone and improve the stone clearance rate.
  • the main body of the currently used ureteral introducer sheath is a relatively flexible tube, and the sheath mouth is difficult to approach the stone.
  • the current ureteral introducer sheath mainly emphasizes the anti-compression and anti-torsion properties. After being inserted into the human body along the guide wire, the toughness of the ureteral introducer sheath can relatively straighten the bending of the ureter, which is convenient for the entry, exit and rotation of the endoscope. operate.
  • the ureteral introducer sheath can only be placed in the upper part of the ureter or just before entering the renal pelvis, forming a channel parallel to the longitudinal axis of the body, which cannot be bent into the renal pelvis and calyces, and thus cannot approach the stone.
  • the existing solution (CN 108211086A) is to provide the ureteral introducer sheath with the ability to actively bend, but the solution is complicated, and the surgeon needs to manipulate the ureteral introducer sheath while manipulating the flexible ureteroscope, and both have active bending.
  • the active bending of the flexible ureteroscope in the sheath is inconsistent with the active bending of the ureteral introducer sheath, the flexible ureteroscope will be damaged immediately, and the simultaneous manipulation of the two overlapping active bending capabilities will bring serious harm to the surgeon. troubled.
  • adding an active bending mechanism to the ureteral introducer sheath will increase the wall thickness of the ureteral introducer sheath and decrease the inner diameter of the ureteral introducer sheath, which affects the safety and efficiency of the operation.
  • CN 211066512U Another solution (CN 211066512U) is to set a "bendable bend" at the front end of the ureteral introducer sheath, and add a flushing channel, which can increase the water flow of perfusion, but the additional flushing channel causes the wall thickness of the ureteral introducer sheath Increase, the outflow tract is relatively reduced, affecting the safety of surgery and the efficiency of stone discharge.
  • the "bendable bending part” is a bending section with a preset specific bending angle, and each angle corresponds to a specific renal calyx. In such an operation, multiple ureteral introducer sheaths need to be replaced, which is tedious and complicated. Not exact.
  • the existing scheme (CN 210301085U) describes a "curved and shaped ureteral guide sheath". Due to the use of a pre-curved scheme, the bending angle of the ureteral guide sheath is difficult to change at any time according to the needs of the operation, and it is difficult to adjust the position of the sheath mouth at any time, and it is difficult to effectively lift the sheath. surgical efficiency.
  • the present utility model designs a flexible ureteral guide sheath.
  • this utility model is to overcome the deficiencies of the prior art, and to provide a bendable ureteral guide sheath, the end section of which can follow the ureteral guide sheath synchronously bent by a flexible ureteroscope, and the sheath opening of the ureteral guide sheath can follow the ureteral guide sheath.
  • the flexible mirror reaches the vicinity of the stone, while the stone is crushed, the fine stone powder can be quickly excreted along the ureteral introducer sheath.
  • even the larger stone can be completely removed during the operation, no longer necessary.
  • the process of natural stone removal after operation; and the surgical field of vision is clear, and there are no small stones rolling in the field of vision, thereby improving the efficiency of the operation and improving the safety of the operation.
  • the present utility model discloses a bendable ureteral guide sheath, comprising a sheath tube, the sheath tube is a bendable tubular structure composed of a main body section and an end section, the end section It is connected to the end of the main body segment, and the elastic modulus of the end segment is smaller than the elastic modulus of the main body segment; after the flexible ureteroscope passes through the end segment, the end segment can follow the flexible ureteroscope to bend.
  • the length of the end section is 5-12 cm.
  • the end segment can be bent by 30-270° following the flexible ureteroscope.
  • a transition segment is connected between the main body segment and the end segment, and the elastic modulus of the transition segment gradually decreases from one end connected to the main body segment to the other end.
  • the front end of the end segment is provided with a compliant portion integrally formed therewith, the elastic modulus of the compliant portion is smaller than that of the end segment, and the length of the compliant portion is 0.5-1.0 cm.
  • a hydrophilic coating is provided on the outer wall of the sheath.
  • a scale is provided on the outer wall of the sheath.
  • the utility model adopts the ureteral guide sheath whose end section can follow the flexible ureteroscope to bend synchronously, and the sheath opening of the ureteral guide sheath can follow the flexible ureteroscope to reach the vicinity of the calculi, and the fine calculus powder can be quickly guided along the ureter while the calculi are crushed.
  • the introduction sheath is discharged from the body, and combined with the intubation of the mesh basket, even large stones can be completely removed during the operation, and the process of natural stone removal after surgery is no longer required; and the surgical field of view is clear, and there are no small stones in the field of vision. Rolling, and then improve the efficiency of surgery, improve the safety of surgery.
  • FIG. 1 is a schematic structural diagram of the first embodiment.
  • FIG. 2 is a schematic structural diagram of the second embodiment.
  • FIG. 3 is a working state diagram of the first embodiment.
  • Embodiment 1 As shown in Figures 1 and 3, this embodiment discloses a bendable ureteral introducer sheath, including a sheath tube 1, which is composed of a main body section 2 and an end section 3 and can be bent. One end of the end section 3 is connected to the end of the main body section 2, the elastic modulus of the end section 3 is smaller than the elastic modulus of the main body section 2, and the flexible ureteroscope passes through the end section 3 Afterwards, the end segment 3 can be bent along with the flexible ureteroscope, so that the end segment 3 can be easily bent, so that the end segment 3 can extend into the lumen of the renal pelvis 6 and the gravel in it can pass through the sheath tube 1 Expelling, combined with the intubation of the mesh basket, even large stones can be completely removed during the operation, and the process of natural stone removal after surgery is no longer required; and the surgical field of view is clear, no small stones roll in the field of vision, and then Improve the efficiency of surgery and improve the safety of surgery.
  • the length of the end section 3 is 5 to 12 cm, and after the flexible ureteroscope passes through the end section 3, the end section 3 can be bent 30 to 270° following the flexible ureteroscope to ensure the length and bending of the end section 3. It can cover the range of the inner cavity of the renal pelvis 6, so that the gravel falling into the renal pelvis 8 can be sucked out from the middle renal calyx 7, the inferior renal calyce 8 and the upper renal calyx 9.
  • the end segment 3 can be sucked out. It can achieve bending within 30 ⁇ 270° under the external force below 1 Newton, while the main body section 2 has a large elastic modulus and is not easily deformed. The state is convenient to enter and exit the flexible ureteroscope.
  • Embodiment 2 As shown in FIG. 2 , the difference between this embodiment and Embodiment 1 is that a transition section 4 is connected between the main body section 2 and the end section 3, and the elastic modulus of the transition section 4 is It gradually decreases from one end connected with the main body section 2 to the other end, so that the end section 3 is gradually merged through the transition section 4 and replaces the main body section 2 to make it smoother.
  • Embodiment 3 The front end of the end section 3 is provided with a compliant portion integrally formed therewith, the elastic modulus of the compliant portion is smaller than the elastic modulus of the end section 3, and the length of the compliant portion is 0.5 ⁇ 1.0 cm, the compliant part can be made of a third material, which can be made into a particularly compliant part, which can be bent with the shape of the collection system, which is convenient for the flexible ureteroscope to carry the optical fiber and the mesh basket in and out, and reduces the protruding optical fiber and the end of the mesh basket to the mucosa.
  • the flexible ureteroscope can quickly enter and exit the kidney while carrying the mesh basket in the proper position, and quickly extract the stones, thereby improving the efficiency of the operation.
  • Embodiment 4 The outer wall of the sheath tube 1 is provided with a hydrophilic coating to facilitate the insertion of the sheath tube 1 and improve the safety and success rate of the operation.
  • a scale is provided on the outer wall of the sheath tube 1 to facilitate the operator to grasp the insertion depth.

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Abstract

The present utility model relates to the technical field of medical apparatuses, and in particular to a bendable ureter guide sheath, comprising a sheath tube. The sheath tube is of a bendable tubular structure composed of a main body section and a tail section, one end of the tail section is connected to a tail end of the main body section, the elastic modulus of the tail section is lower than that of the main body section, and after a flexible ureteroscope passes through the tail section, the tail section can bend along with the flexible ureteroscope. By means of the present utility model, the tail section of the ureter guide sheath can be synchronously bent along with the flexible ureteroscope, a sheath opening of the ureter guide sheath can reach a position close to stones along with the flexible ureteroscope, fine stone powder can be rapidly discharged from the body along the ureter guide sheath when the stones are crushed, larger stones can be completely removed during an operation in combination with the trapping by a mesh basket, and no natural stone passing process is needed after the operation; and the field of view of the operation is clear, and no small stones roll in the field of view, which in turn improves the operation efficiency and increases the operation safety.

Description

一种可弯曲的输尿管导引鞘A flexible ureteral introducer sheath 技术领域technical field
本实用新型涉及医疗设备技术领域，尤其涉及一种可弯曲的输尿管导引鞘。The utility model relates to the technical field of medical equipment, in particular to a bendable ureteral guide sheath.
背景技术Background technique
输尿管软镜碎石术，是利用一条直径3mm左右的细镜，经过尿道、膀胱插入输尿管，将输尿管结石或肾脏结石击碎取出。它利用人体天然的泌尿系统腔道，不在身体上做任何切口，是一种纯粹的泌尿外科腔镜微创手术。适用于保守治疗无效的各种输尿管结石、以及部分肾结石，由于创伤很小，正在逐步替代体外碎石、经皮肾镜等治疗方式，逐步成为主流方式。输尿管导引鞘是输尿管软镜手术常用的耗材，用来建立从体外经过尿道、输尿管，直接进入到肾盂的通道。输尿管软镜经过输尿管导引鞘直接进入手术区域，可以方便的进行相关操作，不受输尿管、尿道的弯曲状态、粗细程度影响。Flexible ureteroscopic lithotripsy is to use a thin mirror with a diameter of about 3mm, insert it into the ureter through the urethra and bladder, and crush and remove ureteral stones or kidney stones. It uses the human body's natural urinary system cavity without making any incisions on the body. It is a pure urological endoscopic minimally invasive surgery. It is suitable for various ureteral calculi and some renal calculi that are ineffective in conservative treatment. Due to the small trauma, it is gradually replacing the treatment methods such as extracorporeal lithotripsy and percutaneous nephroscopy, and has gradually become the mainstream method. The ureteral introducer sheath is a commonly used consumable for flexible ureteroscopic surgery. It is used to establish a channel from outside the body through the urethra and ureter to directly enter the renal pelvis. The flexible ureteroscope directly enters the surgical area through the ureteral introducer sheath, which can facilitate related operations and is not affected by the bending state and thickness of the ureter and urethra.
影响输尿管软镜手术进一步发展的主要因素是手术效率较低，只能处理较小的结石。而影响手术效率的主要因素是结石碎块的清除过程，目前主要是两种方式：取石网篮逐一取出或者将结石尽量粉碎之后等待自然排石。逐一取石太慢，粉碎之后自然排石又容易出现结石残留、复发。所以，较大的结石还是只能选择创伤较大的经皮肾镜手术。The main factor affecting the further development of flexible ureteroscopic surgery is the low efficiency of the operation, which can only deal with smaller stones. The main factor that affects the efficiency of the operation is the removal process of stone fragments. At present, there are mainly two methods: taking out the stone basket one by one or smashing the stones as much as possible and waiting for natural stone removal. Taking the stones one by one is too slow, and after crushing, the natural stone removal is prone to stone residue and recurrence. Therefore, for larger stones, only the more traumatic percutaneous nephroscopic surgery can be selected.
如果输尿管导引鞘的鞘口能够靠近结石，就能够显著提升手术的效率。因为在激光碎石的同时，手术中灌注的水流就可以将结石碎块从输尿管导引鞘冲出，不但避免了结石粉末影响视野、肾脏内堆积等影响手术效率的状况，还可以避免自然排石的不确定性，提升结石清除率。If the sheath opening of the ureteral introducer sheath can be close to the stone, the efficiency of the operation can be significantly improved. At the same time as laser lithotripsy, the water flow injected during the operation can flush out the stone fragments from the ureteral introducer sheath, which not only avoids the impact of the stone powder on the visual field, accumulation in the kidneys, etc. that affect the efficiency of the operation, but also avoids natural discharge. Uncertainty of the stone and improve the stone clearance rate.
目前使用的输尿管导引鞘的主体是比较有韧性的管道，鞘口难以靠近结石。目前的输尿管导引鞘主要强调的是抗压、抗扭曲性能，沿着导丝置入人体之后，输尿管导引鞘的韧性可以将输尿管的弯曲相对拉直，方便内窥镜的进出、旋转等操作。同样因为管道的韧性，输尿管导引鞘只能放在输尿管上段或者刚进入肾盂的位置，形成与身体纵轴平行的通道，无法弯曲进入肾盂、肾盏，也就无法接近结石。The main body of the currently used ureteral introducer sheath is a relatively flexible tube, and the sheath mouth is difficult to approach the stone. The current ureteral introducer sheath mainly emphasizes the anti-compression and anti-torsion properties. After being inserted into the human body along the guide wire, the toughness of the ureteral introducer sheath can relatively straighten the bending of the ureter, which is convenient for the entry, exit and rotation of the endoscope. operate. Also because of the toughness of the tube, the ureteral introducer sheath can only be placed in the upper part of the ureter or just before entering the renal pelvis, forming a channel parallel to the longitudinal axis of the body, which cannot be bent into the renal pelvis and calyces, and thus cannot approach the stone.
现有的解决方案（CN 108211086A ）是为输尿管导引鞘提供主动弯曲的能力，但是该方案较为复杂，手术医生需要在操控输尿管软镜的同时操控输尿管导引鞘，而且两者都有主动弯曲能力，输尿管软镜在鞘内的主动弯曲与输尿管导引鞘的主动弯曲不一致时，会导致输尿管软镜立刻损坏，而且两种重叠的主动弯曲能力的同时操控，会给手术医生带来严重的困扰。而且给输尿管导引鞘增加主动弯曲机制，会导致输尿管导引鞘的壁厚增加，输尿管导引鞘的内径减小，影响手术的安全与效率。The existing solution (CN 108211086A) is to provide the ureteral introducer sheath with the ability to actively bend, but the solution is complicated, and the surgeon needs to manipulate the ureteral introducer sheath while manipulating the flexible ureteroscope, and both have active bending. When the active bending of the flexible ureteroscope in the sheath is inconsistent with the active bending of the ureteral introducer sheath, the flexible ureteroscope will be damaged immediately, and the simultaneous manipulation of the two overlapping active bending capabilities will bring serious harm to the surgeon. troubled. Moreover, adding an active bending mechanism to the ureteral introducer sheath will increase the wall thickness of the ureteral introducer sheath and decrease the inner diameter of the ureteral introducer sheath, which affects the safety and efficiency of the operation.
另一个解决方案（CN 211066512U ）在输尿管导引鞘前端设置“可以弯曲的弯曲部”，并附加冲水通道，能够增大灌注的水流，但是附加的冲水通道导致输尿管导引鞘的壁厚增加，流出道相对减小，影响手术的安全和结石排出的效率。而且根据后续的说明，所述“可以弯曲的弯曲部”是预置特定弯曲角度的弯曲段，每种角度对应处理特定肾盏，这样一个手术中需要更换多个输尿管导引鞘，过程繁琐而不确切。Another solution (CN 211066512U) is to set a "bendable bend" at the front end of the ureteral introducer sheath, and add a flushing channel, which can increase the water flow of perfusion, but the additional flushing channel causes the wall thickness of the ureteral introducer sheath Increase, the outflow tract is relatively reduced, affecting the safety of surgery and the efficiency of stone discharge. Moreover, according to the subsequent description, the "bendable bending part" is a bending section with a preset specific bending angle, and each angle corresponds to a specific renal calyx. In such an operation, multiple ureteral introducer sheaths need to be replaced, which is tedious and complicated. Not exact.
现有方案（CN 210301085U）描述了一种“弯曲定型输尿管导引鞘”，由于采用预弯曲方案，输尿管导引鞘的弯曲角度难以根据手术需要随时改变，难以随时调整鞘口位置，难以切实提升手术效率。The existing scheme (CN 210301085U) describes a "curved and shaped ureteral guide sheath". Due to the use of a pre-curved scheme, the bending angle of the ureteral guide sheath is difficult to change at any time according to the needs of the operation, and it is difficult to adjust the position of the sheath mouth at any time, and it is difficult to effectively lift the sheath. surgical efficiency.
正是基于上述原因，本实用新型设计了一种可弯曲的输尿管导引鞘。Based on the above reasons, the present utility model designs a flexible ureteral guide sheath.
技术解决方案technical solutions
本实用新型的目的在于克服现有技术的不足，提供一种可弯曲的输尿管导引鞘，其末段可以跟随输尿管软镜同步弯曲的输尿管导引鞘，输尿管导引鞘的鞘口可以跟随输尿管软镜到达结石附近，在结石粉碎的同时，细小的结石粉末可以快速沿输尿管导引鞘排出体外，结合网篮的套取，即使较大的结石也能实现术中的完全清除，不再需要术后自然排石的过程；而且手术视野清晰，不再有小结石在视野中翻滚，继而提升手术效率，提升手术的安全性。The purpose of this utility model is to overcome the deficiencies of the prior art, and to provide a bendable ureteral guide sheath, the end section of which can follow the ureteral guide sheath synchronously bent by a flexible ureteroscope, and the sheath opening of the ureteral guide sheath can follow the ureteral guide sheath. When the flexible mirror reaches the vicinity of the stone, while the stone is crushed, the fine stone powder can be quickly excreted along the ureteral introducer sheath. Combined with the intubation of the mesh basket, even the larger stone can be completely removed during the operation, no longer necessary. The process of natural stone removal after operation; and the surgical field of vision is clear, and there are no small stones rolling in the field of vision, thereby improving the efficiency of the operation and improving the safety of the operation.
为了实现本实用新型的目的,本实用新型公开了一种可弯曲的输尿管导引鞘，包括鞘管，所述鞘管为由主体段和末段组成的能够弯曲的管状结构，所述末段与所述主体段末端连接，所述末段的弹性模量小于所述主体段的弹性模量；输尿管软镜穿过所述末段后，所述末段能够跟随所述输尿管软镜弯曲。In order to achieve the purpose of the present utility model, the present utility model discloses a bendable ureteral guide sheath, comprising a sheath tube, the sheath tube is a bendable tubular structure composed of a main body section and an end section, the end section It is connected to the end of the main body segment, and the elastic modulus of the end segment is smaller than the elastic modulus of the main body segment; after the flexible ureteroscope passes through the end segment, the end segment can follow the flexible ureteroscope to bend.
所述末段的长度为5~12cm。The length of the end section is 5-12 cm.
所述末段能够跟随所述输尿管软镜弯曲30~270°。The end segment can be bent by 30-270° following the flexible ureteroscope.
所述主体段与所述末段之间连接有过渡段，所述过渡段的弹性模量由与主体段连接的一端向另一端逐渐减小。A transition segment is connected between the main body segment and the end segment, and the elastic modulus of the transition segment gradually decreases from one end connected to the main body segment to the other end.
所述末段的前端设有与之一体成型的柔顺部，所述柔顺部的弹性模量小于所述末段的弹性模量，所述柔顺部的长度为0.5~1.0cm。The front end of the end segment is provided with a compliant portion integrally formed therewith, the elastic modulus of the compliant portion is smaller than that of the end segment, and the length of the compliant portion is 0.5-1.0 cm.
所述鞘管的外壁上设有亲水涂层。A hydrophilic coating is provided on the outer wall of the sheath.
所述鞘管的外壁上设有刻度。A scale is provided on the outer wall of the sheath.
有益效果beneficial effect
本实用新型通过末段可以跟随输尿管软镜同步弯曲的输尿管导引鞘，输尿管导引鞘的鞘口可以跟随输尿管软镜到达结石附近，在结石粉碎的同时，细小的结石粉末可以快速沿输尿管导引鞘排出体外，结合网篮的套取，即使较大的结石也能实现术中的完全清除，不再需要术后自然排石的过程；而且手术视野清晰，不再有小结石在视野中翻滚，继而提升手术效率，提升手术的安全性。The utility model adopts the ureteral guide sheath whose end section can follow the flexible ureteroscope to bend synchronously, and the sheath opening of the ureteral guide sheath can follow the flexible ureteroscope to reach the vicinity of the calculi, and the fine calculus powder can be quickly guided along the ureter while the calculi are crushed. The introduction sheath is discharged from the body, and combined with the intubation of the mesh basket, even large stones can be completely removed during the operation, and the process of natural stone removal after surgery is no longer required; and the surgical field of view is clear, and there are no small stones in the field of vision. Rolling, and then improve the efficiency of surgery, improve the safety of surgery.
附图说明Description of drawings
图1为实施例一的结构示意图。FIG. 1 is a schematic structural diagram of the first embodiment.
图2为实施例二的结构示意图。FIG. 2 is a schematic structural diagram of the second embodiment.
图3为实施例一的工作状态图。FIG. 3 is a working state diagram of the first embodiment.
图中，1鞘管，2主体段，3末段，4过渡段，5尿道，6肾盂，7肾中盂，8肾下盂，9肾上盂。In the figure, 1 sheath, 2 main segment, 3 terminal segment, 4 transition segment, 5 urethra, 6 renal pelvis, 7 middle renal pelvis, 8 infrarenal pelvis, and 9 suprarenal pelvis.
本发明的实施方式Embodiments of the present invention
下面结合附图和实施例对本实用新型进一步说明：参见图1-3。The present utility model will be further described below in conjunction with the accompanying drawings and embodiments: refer to Figures 1-3.
实施例一：如图1、3所示，本实施例公开了一种可弯曲的输尿管导引鞘，包括鞘管1，所述鞘管1为由主体段2和末段3组成的能够弯曲的管状结构，所述末段3的一端与所述主体段2末端连接，所述末段3的弹性模量小于所述主体段2的弹性模量，输尿管软镜穿过所述末段3后，所述末段3能够跟随所述输尿管软镜弯曲，从而使得末段3能够轻易的弯曲，从而使得末段3能够伸入肾盂6内腔中将其内的碎石均通过鞘管1排出，结合网篮的套取，即使较大的结石也能实现术中的完全清除，不再需要术后自然排石的过程；而且手术视野清晰，不再有小结石在视野中翻滚，继而提升手术效率，提升手术的安全性。Embodiment 1: As shown in Figures 1 and 3, this embodiment discloses a bendable ureteral introducer sheath, including a sheath tube 1, which is composed of a main body section 2 and an end section 3 and can be bent. One end of the end section 3 is connected to the end of the main body section 2, the elastic modulus of the end section 3 is smaller than the elastic modulus of the main body section 2, and the flexible ureteroscope passes through the end section 3 Afterwards, the end segment 3 can be bent along with the flexible ureteroscope, so that the end segment 3 can be easily bent, so that the end segment 3 can extend into the lumen of the renal pelvis 6 and the gravel in it can pass through the sheath tube 1 Expelling, combined with the intubation of the mesh basket, even large stones can be completely removed during the operation, and the process of natural stone removal after surgery is no longer required; and the surgical field of view is clear, no small stones roll in the field of vision, and then Improve the efficiency of surgery and improve the safety of surgery.
所述末段3的长度为5~12cm，输尿管软镜穿过所述末段3后，所述末段3能够跟随所述输尿管软镜弯曲30~270°，确保末段3的长度以及弯曲程度能够覆盖肾盂6的内腔范围，从而能够使得在肾中盏7、肾下盏8中以及肾上盏9中掉落至肾下盂8中的碎石吸出，优选的，末段3可以在1牛顿以下的外力下实现30~270°以内的弯曲，而主体段2弹性模量较大，不易变形，在沿着导丝变形置入人体后，通过自身的弹性回复成较为挺直的状态，方便输尿管软镜进出。The length of the end section 3 is 5 to 12 cm, and after the flexible ureteroscope passes through the end section 3, the end section 3 can be bent 30 to 270° following the flexible ureteroscope to ensure the length and bending of the end section 3. It can cover the range of the inner cavity of the renal pelvis 6, so that the gravel falling into the renal pelvis 8 can be sucked out from the middle renal calyx 7, the inferior renal calyce 8 and the upper renal calyx 9. Preferably, the end segment 3 can be sucked out. It can achieve bending within 30~270° under the external force below 1 Newton, while the main body section 2 has a large elastic modulus and is not easily deformed. The state is convenient to enter and exit the flexible ureteroscope.
实施例二：如图2所示，本实施例与实施例一不同之处在于，所述主体段2与所述末段3之间连接有过渡段4，所述过渡段4的弹性模量由与主体段2连接的一端向另一端逐渐减小，使得末段3通过过渡段4逐步融合、替代主体段2，使之更为平滑。Embodiment 2: As shown in FIG. 2 , the difference between this embodiment and Embodiment 1 is that a transition section 4 is connected between the main body section 2 and the end section 3, and the elastic modulus of the transition section 4 is It gradually decreases from one end connected with the main body section 2 to the other end, so that the end section 3 is gradually merged through the transition section 4 and replaces the main body section 2 to make it smoother.
实施例三：所述末段3的前端设有与之一体成型的柔顺部，所述柔顺部的弹性模量小于所述末段3的弹性模量，所述柔顺部的长度为0.5~1.0cm，柔顺部可以由第三种材料，做成特别柔顺的部分，可以随着收集系统的形态弯曲，方便输尿管软镜带着光纤、网篮进出，减少突出的光纤、网篮末端对粘膜的损伤，通过避免鞘口被粘膜挡住，让输尿管软镜能够在携带着恰当位置的网篮时快速进出肾脏，快速套取结石，进而提升手术效率。Embodiment 3: The front end of the end section 3 is provided with a compliant portion integrally formed therewith, the elastic modulus of the compliant portion is smaller than the elastic modulus of the end section 3, and the length of the compliant portion is 0.5~1.0 cm, the compliant part can be made of a third material, which can be made into a particularly compliant part, which can be bent with the shape of the collection system, which is convenient for the flexible ureteroscope to carry the optical fiber and the mesh basket in and out, and reduces the protruding optical fiber and the end of the mesh basket to the mucosa. By preventing the sheath opening from being blocked by the mucous membrane, the flexible ureteroscope can quickly enter and exit the kidney while carrying the mesh basket in the proper position, and quickly extract the stones, thereby improving the efficiency of the operation.
实施例四：所述鞘管1的外壁上设有亲水涂层，以方便鞘管1的插入，提升手术的安全性和成功率。Embodiment 4: The outer wall of the sheath tube 1 is provided with a hydrophilic coating to facilitate the insertion of the sheath tube 1 and improve the safety and success rate of the operation.
所述鞘管1的外壁上设有刻度，以方便手术者掌握插入深度。A scale is provided on the outer wall of the sheath tube 1 to facilitate the operator to grasp the insertion depth.
以上所述仅为本实用新型的实施例，并非因此限制本实用新型的专利范围，凡是利用本实用新型说明书及附图内容所作的等同变换或直接或间接运用在相关的技术领域，均同理包括在本实用新型的专利保护范围内。The above are only the embodiments of the present utility model, and are not intended to limit the scope of the present utility model patent. All equivalent transformations made by using the contents of the present utility model description and accompanying drawings or directly or indirectly applied in the relevant technical fields are the same. Included in the scope of patent protection of the present invention.

Claims (7)

  1. 一种可弯曲的输尿管导引鞘，其特征在于：包括鞘管（1），所述鞘管（1）为由主体段（2）和末段（3）组成的能够弯曲的管状结构，所述末段（3）与所述主体段（2）末端连接，所述末段（3）的弹性模量小于所述主体段（2）的弹性模量；输尿管软镜穿过所述末段（3）后，所述末段（3）能够跟随所述输尿管软镜弯曲。A bendable ureteral introducer sheath, characterized in that it comprises a sheath tube (1), wherein the sheath tube (1) is a bendable tubular structure composed of a main body section (2) and a terminal section (3), The end section (3) is connected to the end of the main body section (2), the elastic modulus of the end section (3) is smaller than the elastic modulus of the main body section (2); the flexible ureteroscope passes through the end section After (3), the end segment (3) can be bent following the flexible ureteroscope.
  2. 根据权利要求1所述的一种可弯曲的输尿管导引鞘，其特征在于：所述末段（3）的长度为5~12cm。A bendable ureteral introducer sheath according to claim 1, characterized in that: the length of the end section (3) is 5-12 cm.
  3. 根据权利要求2所述的一种可弯曲的输尿管导引鞘，其特征在于：所述末段（3）能够跟随所述输尿管软镜弯曲30~270°。A bendable ureteral introducer sheath according to claim 2, characterized in that: the end section (3) can be bent by 30-270° following the flexible ureteroscope.
  4. 根据权利要求3所述的一种可弯曲的输尿管导引鞘，其特征在于：所述主体段（2）与所述末段（3）之间连接有过渡段（4），所述过渡段（4）的弹性模量由与主体段（2）连接的一端向另一端逐渐减小。A bendable ureteral introducer sheath according to claim 3, characterized in that a transition section (4) is connected between the main body section (2) and the end section (3), and the transition section The elastic modulus of (4) gradually decreases from one end connected with the main body segment (2) to the other end.
  5. 根据权利要求4所述的一种可弯曲的输尿管导引鞘，其特征在于：所述末段（3）的前端设有与之一体成型的柔顺部，所述柔顺部的弹性模量小于所述末段（3）的弹性模量，所述柔顺部的长度为0.5~1.0cm。A bendable ureteral introducer sheath according to claim 4, characterized in that: the front end of the end section (3) is provided with a compliant portion integrally formed therewith, and the elastic modulus of the compliant portion is smaller than the Regarding the elastic modulus of the last section (3), the length of the compliant portion is 0.5-1.0 cm.
  6. 根据权利要求1-5任一项所述的一种可弯曲的输尿管导引鞘，其特征在于：所述鞘管（1）的外壁上设有亲水涂层。A bendable ureteral introducer sheath according to any one of claims 1-5, characterized in that: the outer wall of the sheath tube (1) is provided with a hydrophilic coating.
  7. 根据权利要求6所述的一种可弯曲的输尿管导引鞘，其特征在于：所述鞘管（1）的外壁上设有刻度。A bendable ureteral introducer sheath according to claim 6, characterized in that a scale is provided on the outer wall of the sheath tube (1).
PCT/CN2021/121633 2020-12-04 2021-09-29 Bendable ureter guide sheath WO2022116664A1 (en)

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CN214073417U (en) * 2020-12-04 2021-08-31 匡仁锐 Flexible ureter guide sheath

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050234437A1 (en) * 1999-07-14 2005-10-20 Cardiofocus, Inc. Deflectable sheath catheters with out-of-plane bent tip
CN204637260U (en) * 2015-05-07 2015-09-16 上海英诺伟医疗器械有限公司 A kind of ureter guiding sheath
CN107811600A (en) * 2017-10-20 2018-03-20 上海安清医疗器械有限公司 The soft or hard swan-neck of multisection type gradual change, endoscope-use insertion tube and endoscope using the swan-neck
CN210277285U (en) * 2019-01-16 2020-04-10 深圳朗医科技有限公司 Guide sheath
CN211066512U (en) * 2019-08-21 2020-07-24 王怀亮 Ureter soft lens conveying sheath assembly
CN211749775U (en) * 2019-12-02 2020-10-27 上海市第一人民医院宝山分院 Ureteroscope conveying sheath with bendable head
CN214073417U (en) * 2020-12-04 2021-08-31 匡仁锐 Flexible ureter guide sheath

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050234437A1 (en) * 1999-07-14 2005-10-20 Cardiofocus, Inc. Deflectable sheath catheters with out-of-plane bent tip
CN204637260U (en) * 2015-05-07 2015-09-16 上海英诺伟医疗器械有限公司 A kind of ureter guiding sheath
CN107811600A (en) * 2017-10-20 2018-03-20 上海安清医疗器械有限公司 The soft or hard swan-neck of multisection type gradual change, endoscope-use insertion tube and endoscope using the swan-neck
CN210277285U (en) * 2019-01-16 2020-04-10 深圳朗医科技有限公司 Guide sheath
CN211066512U (en) * 2019-08-21 2020-07-24 王怀亮 Ureter soft lens conveying sheath assembly
CN211749775U (en) * 2019-12-02 2020-10-27 上海市第一人民医院宝山分院 Ureteroscope conveying sheath with bendable head
CN214073417U (en) * 2020-12-04 2021-08-31 匡仁锐 Flexible ureter guide sheath

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