CN115040764B - Novel urethra dilator - Google Patents
Novel urethra dilator Download PDFInfo
- Publication number
- CN115040764B CN115040764B CN202210693802.XA CN202210693802A CN115040764B CN 115040764 B CN115040764 B CN 115040764B CN 202210693802 A CN202210693802 A CN 202210693802A CN 115040764 B CN115040764 B CN 115040764B
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- Prior art keywords
- guide wire
- film
- film sleeve
- sleeve
- ball head
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- 210000003708 urethra Anatomy 0.000 title abstract description 16
- 239000010408 film Substances 0.000 claims abstract description 120
- 239000010409 thin film Substances 0.000 claims abstract description 41
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 30
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 8
- 210000001124 body fluid Anatomy 0.000 claims description 6
- 239000010839 body fluid Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 230000006378 damage Effects 0.000 abstract description 4
- 239000007787 solid Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 210000001519 tissue Anatomy 0.000 description 5
- 208000014674 injury Diseases 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 210000003932 urinary bladder Anatomy 0.000 description 4
- 208000007536 Thrombosis Diseases 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000010339 dilation Effects 0.000 description 3
- 230000008733 trauma Effects 0.000 description 3
- 206010046442 Urethral dilatation Diseases 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 230000000916 dilatatory effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 230000002485 urinary effect Effects 0.000 description 2
- 206010046454 Urethral injury Diseases 0.000 description 1
- 206010065584 Urethral stenosis Diseases 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000642 iatrogenic effect Effects 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 201000001988 urethral stricture Diseases 0.000 description 1
- 210000001635 urinary tract Anatomy 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- A61M29/00—Dilators with or without means for introducing media, e.g. remedies
- A61M29/02—Dilators made of swellable material
-
- 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
- A61M2210/00—Anatomical parts of the body
- A61M2210/10—Trunk
- A61M2210/1078—Urinary tract
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
A novel urethral dilator comprising: the guide wire is provided with a ball head structure at the head end of the guide wire, and the maximum diameter of the ball head structure is larger than that of the guide wire; the expandable catheter assembly comprises a sleeve-shaped film sleeve, the film sleeve is sleeved on the outer side of the guide wire and is wound in the accommodating space, the front end of the film sleeve is adhered to the ball head structure, and an injection port is formed in the rear end of the film sleeve. In the invention, the middle channel structure design formed after the expansion of the film sleeve can avoid the problem that the original hollow dilator damages the urethra. The invention can also ensure that the expander keeps smaller volume in the entering process and ensures the integral strength. The thin film sleeve is designed, the volume structure of the expander is changed through the thin film sleeve, after the expander enters a human body for positioning, the thin film sleeve can be expanded and expanded, the structural form of the thin film sleeve is kept, the middle channel is kept in an open state, and the success rate of catheterization is increased.
Description
Technical Field
The invention relates to the technical field of medical auxiliary instruments, in particular to a novel urethral dilator which is particularly suitable for gynaecology and urology department.
Background
At present, after the transurethral surgery of urinary surgery, as iatrogenic urethral injury is increased and urethral stricture patients are increased, the patients need to be treated by urethral dilatation regularly, in the clinical operation process, the traditional solid urethral dilator completely needs to judge whether the urethral dilator reaches the bladder or not by hand feeling and experience, and no clear evidence exists that the urethral dilator is on wrong way in the urethral dilatation process, so that a urethral false channel is formed, and the treatment wound is increased. In the past, a hollow urethral dilator is bent in the treatment process, the opening of the dilator is too large, the urethral mucosa is damaged, and the treatment wound is increased.
Therefore, there is a need to provide a urethral dilator that has good dilating effect, good structural strength, and is not prone to trauma.
Disclosure of Invention
First technical problem
The invention aims to overcome the defects and shortcomings of the prior art and provide the urethral dilator with the band-pass structure, which has good dilating effect, good structural strength and difficult wound generation.
(II) technical scheme
The present invention provides a novel urethral dilator, in the present invention, the novel urethral dilator comprises:
the guide wire is provided with a ball head structure at the head end of the guide wire, the maximum diameter of the ball head structure is larger than that of the guide wire, and an accommodating space is formed between the ball head structure and the guide wire on an axial section perpendicular to the guide wire;
the inflatable catheter assembly comprises a sleeve-shaped film sleeve, the film sleeve is sleeved on the outer side of the guide wire and is wound in the accommodating space, the front end of the film sleeve is adhered to the ball head structure, and an injection port is formed in the rear end of the film sleeve and used for injecting fluid which enables the film sleeve to expand.
Preferably, in the novel urethral dilator provided by the invention, an electrical component for changing the fluid voltage within the thin film sleeve is arranged at the rear end of the thin film sleeve; the fluid is electrorheological fluid.
Preferably, in the novel urethral dilator provided by the invention, the guide wire is a titanium alloy guide wire, and the bulb structure is a titanium alloy bulb structure.
Preferably, in the novel urethral dilator provided by the invention, the bulb structure is arranged at the head end of the guide wire and is of an integrated structure with the guide wire.
Preferably, in the novel urethral dilator provided by the invention, the bulb structure is a round bulb structure or a fusiform bulb structure; the outer side face of the ball head structure is a smooth plane.
Preferably, in the novel urethral dilator provided by the invention, one end of the thin film sleeve, which is arranged on the guide wire and is close to the bulb structure, is the front end of the sleeve, a connecting thin film is arranged in the middle channel of the thin film sleeve and at the position of the front end of the sleeve, the breaking strength of the connecting thin film is smaller than that of the thin film sleeve, the connecting thin film comprises a head end side, a tail end side and a middle section, the head end side is adhered with the bulb structure, the tail end side is adhered with the thin film sleeve, and the length of the middle section is smaller than the maximum radius of the bulb structure.
Preferably, in the novel urethral dilator provided by the invention, the adhesion strength between the tail end side edge and the thin film sleeve is greater than the breaking strength of the connecting thin film and less than the breaking strength of the thin film sleeve; the adhesion strength of the head end side edge and the ball head structure is smaller than the breaking strength of the connecting film.
Preferably, in the novel urethral dilator provided by the invention, the diameter range of the guide wire is 2mm-3mm, and the maximum diameter of the bulb structure is 0.5mm-1mm larger than the diameter of the guide wire.
Preferably, in the novel urethral dilator provided by the invention, in the inflated state, the diameter of the outer side surface of the thin film sleeve ranges from 2mm to 4mm, the diameter of the inner side surface of the thin film sleeve ranges from 1mm to 3mm, and the difference between the diameter of the outer side surface and the diameter of the inner side surface ranges from 0.5mm to 1.5mm.
Preferably, in the novel urethral dilator provided by the invention, a venturi tube structure is arranged at the rear end of the thin film sleeve.
(III) beneficial effects
The present invention provides a novel urethral dilator comprising: the guide wire is provided with a ball head structure at the head end of the guide wire, the maximum diameter of the ball head structure is larger than that of the guide wire, and an accommodating space is formed between the ball head structure and the guide wire on an axial section perpendicular to the guide wire; the inflatable catheter assembly comprises a sleeve-shaped film sleeve, the film sleeve is sleeved on the outer side of the guide wire and is wound in the accommodating space, the front end of the film sleeve is adhered to the ball head structure, and an injection port is formed in the rear end of the film sleeve and used for injecting fluid which enables the film sleeve to expand.
Through the structural design, compared with the prior art, the invention has the following beneficial effects:
1. the novel urethral dilator provided by the invention can change the integral form, keep a smaller diameter in the process of entering the urethra, and after entering a human body in place, the thin film sleeve can be injected with fluid for expansion, so that a sleeve structure with a channel structure in the middle part is formed. The invention combines the advantages of the solid urethral dilator and the hollow urethral dilator, solves the problems that bleeding is difficult to judge and whether the urinary bladder is reached in urethral dilation treatment, and meanwhile, the middle channel structure design formed after the expansion of the thin film sleeve can avoid the problem that the original hollow dilator damages the urinary tract, and the channel structure (the channel structure formed after the expansion of the thin film sleeve) solves the problems that the urinary catheterization is difficult or can not be performed after the dilation of individual patients caused by difficult in-line guide wire;
2. compared with the urethral dilator without the channel structure in the prior art, the whole length of the invention (the whole length of the film sleeve) is changed from 24cm to 44cm, namely, the main body part of the 5Fr urethral dilator is prolonged, the length of the dilator is prolonged (the length is increased, the application range of the dilator is expanded), and meanwhile, the small volume of the dilator is kept in the entering process and the whole strength is ensured;
3. the thin film sleeve is designed, the volume structure of the expander is changed through the thin film sleeve, after the expander enters a human body for positioning, the thin film sleeve can be expanded and expanded, the structural form of the thin film sleeve is kept, the middle channel is kept in an open state, and the success rate of catheterization is increased.
Drawings
Figure 1 is a schematic illustration of the structure of the novel urethral dilator in one embodiment of the invention.
In fig. 1, the correspondence between the component names and the reference numerals is:
a guide wire 1, a ball head structure 2, a film sleeve 3, an electric component 4, a connecting film 5,
A venturi structure 6.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, fig. 1 is a schematic diagram showing the structure of a novel urethral dilator according to an embodiment of the invention.
The invention provides a novel urethral dilator, which is divided into two types in the prior art, wherein one type is a dilator with a catheter channel, and the other type is a solid dilator. The solid expander can ensure that the whole expander has higher structural strength, so that the solid expander can be thinner and is more convenient to use clinically, but the solid expander only has an expanding function and can not realize drainage and drainage when expanding. The dilator with the catheter channel is provided with an elongated channel structure, and the drainage and drainage are carried out through the channel structure arranged on the dilator, but the overall structural strength of the dilator is lower due to the elongated channel structure, the use requirement is met by increasing the volume of the dilator, the use difficulty of the dilator is increased due to the increase of the volume of the dilator, and the risk of human body trauma is increased.
Aiming at the structural defects of the two dilators, the invention provides the urethra dilator with a novel structure, the dilator can change the volume of the dilator, keep a smaller diameter when entering a human body, is convenient for entering the human body, can expand the diameter and form a channel structure after entering the human body, thereby realizing the dredging and drainage of body fluid (blood clot or urine) in the human body. The novel urethral dilator provided by the invention is particularly suitable for gynaecology and urology department.
Specifically, the novel urethral dilator provided by the invention has the following structure, comprising:
a first part: a guide wire 1.
The guide wire 1 is a structure for realizing the novel urethral dilator to enter the human body and realize the propelling in the urethra.
The guide wire 1 is a wire-shaped (slender rod-shaped) structure with certain structural strength, and preferably, the guide wire 1 can also have certain elasticity, so that when entering the urethra and being pushed in the urethra, if contacting with human tissues, the guide wire 1 can elastically deform, thereby reducing the probability of trauma to the human tissues caused by hard contact.
In the invention, the guide wire 1 can be made of a titanium alloy material, and the guide wire 1 can also be made of a stainless steel material. The diameter of the guide wire 1 ranges from 2mm to 3mm, and can be specifically 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm and 3.0mm.
In order to facilitate the guide wire 1 to enter a human body and avoid the problems of scratch, puncture and the like of human tissues caused by the contact of the head of the guide wire 1 with the human body, the head end of the guide wire 1 is provided with a ball head structure 2. The ball head structure 2 is designed according to the size of the guide wire 1, and in the invention, the maximum diameter of the ball head structure 2 is 0.5mm-1mm larger than the diameter of the guide wire 1.
The maximum diameter of the ball head structure 2 (the ball head structure 2 can be a round ball head or a fusiform ball head structure 2) is larger than the diameter of the guide wire 1 (the guide wire 1 is an equal-diameter slender rod), and an accommodating space is formed between the ball head structure 2 and the guide wire 1 on an axial section perpendicular to the guide wire 1. A more visual explanation of the above structure is as follows: the guide wire 1 and the ball head structure 2 are projected in the axial direction parallel to the guide wire 1, the ball head structure 2 is a circular projection, the guide wire 1 is a circular projection, the ball head structure 2 projection completely covers the guide wire 1 projection, the ball head structure 2 projection is concentric with the guide wire 1 projection, an annular area is formed between the outer edge of the ball head structure 2 projection and the outer edge of the guide wire 1 projection, and the annular area can be understood as the projection of the accommodating space.
When in use, one end of the guide wire 1 provided with the bulb structure 2 enters the bladder of the human body from the urethral orifice of the human body through the urethra, thereby realizing the expansion of the whole urethra. The other end (one end without the ball head structure 2) of the guide wire 1 is positioned outside the human body so as to facilitate the extraction of the guide wire 1 (the extraction from the film sleeve 3), and in addition, the other end of the guide wire 1 can be applied with acting force so that the guide wire 1 can perform small-amplitude reciprocating motion to break up thrombus blocks (blood clots) in the urethra.
Specifically, the guide wire 1 is a titanium alloy guide wire 1, and the ball head structure 2 is a titanium alloy ball head structure 2.
Specifically, the ball head structure 2 is disposed at the head end of the guide wire 1 and is integrated with the guide wire 1. Further, the ball head structure 2 is a round ball head structure 2 or a fusiform ball head structure 2, and the outer side surface of the ball head structure 2 is a smooth plane.
The bulb structure 2 is arranged at the head end of the guide wire 1, the outer side surface of the bulb structure 2 is of a smooth surface structure, so that when the guide wire 1 contacts human tissues, the injury to the human tissues is avoided, and meanwhile, when the guide wire 1 moves in the urethra, the urethral canal wall can well guide the bulb structure 2. Specifically, the ball head structure 2 has two preferred structures, one is a round ball head structure 2, the other is a fusiform structure, when the fusiform structure is adopted, two tips of the ball head structure 2 are both spherical structures, one tip is fixedly connected with the guide wire 1 (a small hole is formed in the tip according to the diameter of the guide wire 1, the end part of the guide wire 1 is inserted into the small hole and then welded, and then the connecting part is polished smoothly).
In the embodiment in which the guide wire 1 and the ball head structure 2 are made of a titanium alloy material, the outer surfaces of the guide wire 1 and the ball head structure 2 do not need to be provided with any coating, and only the surfaces of the guide wire 1 and the ball head structure 2 need to be subjected to mirror polishing treatment.
A second part: an expandable catheter assembly.
An expandable catheter assembly is an assembly whose controlled deformation can change its volume (primarily its diameter).
Specifically, the expandable catheter assembly includes a sleeve-shaped (sleeve-shaped refers to the overall shape of the thin film sleeve 3 after fluid injection and expansion, and the sleeve-shaped thin film sleeve 3 can be used for realizing the expansion and expansion of a urethral canal, and simultaneously can also form a channel structure for realizing the drainage and drainage of body fluid) (the thin film sleeve 3 refers to a sleeve structure made of a high polymer thin film material, and the thin film sleeve 3 is preferably made of a medical PVC material, has smaller overall size and can be manufactured by a fine worker). The film sleeve 3 is made of an inelastic (inelastic) film material and comprises an inner film and an outer film, the inner film is of a straight cylinder structure, the outer film is of a straight cylinder structure, the diameter of the outer film is larger than that of the inner film, the inner film is sleeved into the outer film, then two ends of the outer film are sealed, a plurality of small-size fan-shaped structures (the fan-shaped structures can be spliced into a circular ring-shaped structure) are arranged at the sealing positions, and therefore after the film sleeve 3 is inflated by filling fluid, the fan-shaped structures can limit to enable the whole film sleeve 3 to keep a tubular structure. Further, the present invention may also be provided on the surface of the inner membrane (on the side facing the outer side) with parallel ribs of the guide wire 1.
The film sleeve 3 is sleeved on the outer side of the guide wire 1 and is wound (the film sleeve 3 is equivalent to two flexible films in a fluid discharge state and can be wound randomly) in the accommodating space, the front end of the film sleeve 3 is adhered to the ball head structure 2 (when the ball head structure 2 is connected in an adhering manner, the ball head structure 2 is separated from the film sleeve 3 by applying a certain acting force), and the rear end of the film sleeve 3 is provided with an injection port for injecting fluid which enables the film sleeve 3 to expand. The injection port is a member of rigid plastic or rubber material for interfacing with a container (e.g., a syringe) containing a fluid, the container applying pressure to the fluid to force the fluid into the thin film sheath 3 to effect inflation of the thin film sheath 3.
After the expansion of the film sleeve 3, the middle part can form a channel structure for draining the body fluid out of the body, and the film sleeve 3 has lower structural strength in the later period after the expansion, so as to increase the overall structural strength of the film sleeve 3 after the expansion, the invention provides the following two embodiments: 1. increasing the pressure of the fluid in the membrane sleeve 3; 2. changing the fluid properties (liquid or gaseous) to solid. For the first mode, any fluid harmless to human body, such as silicone oil, distilled water, etc., can be selected in the present invention, and in the first mode, the requirement on the structural strength of the film sleeve 3 is high. For the second mode, the invention defines that the fluid is electrorheological fluid, the electrorheological fluid is a novel material, the electrorheological fluid is in a liquid state in a normal state (in a no-voltage loading state), the electrorheological fluid can be changed into a solid state when voltage is loaded, and the shape of the electrorheological fluid is not changed when the character of the electrorheological fluid is changed. Based on the second mode, the rear end of the film sleeve 3 is provided with an electric component 4 for changing the fluid voltage in the film sleeve 3.
Further, the film sleeve 3 is arranged on the guide wire 1 and is close to one end of the ball head structure 2, the front end of the sleeve is arranged at the position, in the middle channel of the film sleeve 3, of the front end of the sleeve, a connecting film 5 is arranged, the breaking strength of the connecting film 5 is smaller than that of the film sleeve 3, the connecting film 5 comprises a head end side edge, a tail end side edge and a middle section, the head end side edge is adhered with the ball head structure 2, the tail end side edge is adhered with the film sleeve 3, and the length of the middle section is smaller than the maximum radius of the ball head structure 2.
In the above structural design, the present invention provides the connection film 5, and the connection film 5 is defined in two aspects as follows: 1. for the material of the connecting film 5, the film sleeve 3 and the connecting film 5 are selected by combining the film sleeve 3, so that the breaking strength of the connecting film 5 is smaller than that of the film sleeve 3, and when the guide wire 1 is pulled out of the film sleeve 3, the connecting film 5 is firstly broken, so that the ball head structure 2 is separated from the film sleeve 3; 2. for the size of the connecting film 5, after the head end side is adhered to the ball head structure 2 and the tail end side is adhered to the film sleeve 3, the length of the middle section of the connecting film 5 is smaller than the maximum radius of the ball head structure 2, so that after the connecting film 5 is torn off, the connecting film 5 does not leak out at the head end of the film sleeve 3, and body fluid in a human body smoothly enters into a middle pipeline of the film sleeve 3 from the head end of the film sleeve 3.
Still further, the adhesion strength between the tail end side and the film sleeve 3 is greater than the breaking strength of the connecting film 5 and less than the breaking strength of the film sleeve 3, and the adhesion strength between the head end side and the ball structure 2 is less than the breaking strength of the connecting film 5. In the above-described structural design, when the guide wire 1 is pulled out, the adhesion structure is firstly broken, and if the breaking fails, the connection film 5 is torn.
Specifically, in the expanded state of the film sleeve 3, the diameter of the outer side surface of the film sleeve 3 ranges from 2mm to 4mm (specific dimensions of the outer side surface are 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4.0 mm), the diameter of the inner side surface of the film sleeve 3 ranges from 1mm to 3mm (specific dimensions of the outer side surface are 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0 mm), and the diameter difference between the diameter of the outer side surface and the diameter of the inner side surface ranges from 0.5mm to 1.5mm.
Third section: a venturi structure 6.
As another important point of the present invention, the present invention is provided with a venturi structure 6 at the rear end of the membrane sleeve 3.
Specifically, the venturi tube structure 6 comprises a venturi tube main body, an interface is arranged at the small-diameter section of the venturi tube main body, and meanwhile, the tail end of the film sleeve 3 is provided with a hard tubular structure, so that the film sleeve can be mounted on the hard tubular structure at the tail end of the film sleeve 3 through the interface arranged on the venturi tube main body. The intermediate channel structure of the membrane sleeve 3 can be made to form a negative pressure by means of a venturi tube, so that body fluids, plug pieces and the like are sucked out.
The present invention provides a novel urethral dilator comprising: the guide wire 1, a ball head structure 2 is arranged at the head end of the guide wire 1, the maximum diameter of the ball head structure 2 is larger than that of the guide wire 1, and an accommodating space is formed between the ball head structure 2 and the guide wire 1 on an axial section perpendicular to the guide wire 1; the expandable catheter assembly comprises a sleeve-shaped film sleeve 3, the film sleeve 3 is sleeved on the outer side of the guide wire 1 and is wound in the accommodating space, the front end of the film sleeve 3 is adhered to the ball head structure 2, and the rear end of the film sleeve 3 is provided with an injection port for injecting fluid for expanding the film sleeve 3.
Through the structural design, compared with the prior art, the invention has the following beneficial effects:
1. the novel urethral dilator provided by the invention can change the integral form, keep a smaller diameter in the process of entering the urethra, and after entering a human body in place, the thin film sleeve 3 can be injected with fluid for expansion, so that a sleeve structure with a channel structure in the middle part is formed. The invention combines the advantages of the solid urethral dilator and the hollow urethral dilator, solves the problem that whether bleeding reaches the bladder or not is difficult to judge in urethral dilation treatment, and meanwhile, the middle channel structure design formed after the expansion of the thin film sleeve 3 can avoid the problem that the original hollow dilator damages the urethra, and the channel structure (the channel structure formed after the expansion of the thin film sleeve 3) solves the problem that the urethral catheterization of individual patients is difficult or impossible after the expansion caused by the difficulty of leading in the guide wire 1;
2. compared with the urethra dilator without the channel structure in the prior art, the whole length of the invention (the whole length of the film sleeve 3) is changed from 24cm to 44cm, namely, the main body part of the 5Fr urethra dilator is prolonged, the length of the dilator is prolonged (the length is increased, the application range of the dilator is expanded), and meanwhile, the small volume of the dilator is kept in the entering process and the whole strength is ensured;
3. the thin film sleeve 3 is designed, the volume structure of the expander is changed through the thin film sleeve 3, after the expander enters the human body for positioning, the thin film sleeve 3 can be expanded and expanded, the structural form of the expander is kept, the middle channel is kept in an open state, and the success rate of catheterization is increased.
The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (6)
1. A novel urethral dilator, comprising:
the guide wire comprises a guide wire (1), wherein the head end of the guide wire is provided with a ball head structure (2), the maximum diameter of the ball head structure is larger than that of the guide wire, and an accommodating space is formed between the ball head structure and the guide wire on an axial section perpendicular to the guide wire;
the inflatable catheter assembly comprises a sleeve-shaped film sleeve (3), the film sleeve is sleeved on the outer side of the guide wire and is wound in the accommodating space, the front end of the film sleeve is adhered with the ball head structure, and the rear end of the film sleeve is provided with an injection port for injecting fluid for expanding the film sleeve;
after the film sleeve (3) is expanded, the middle part can form a channel structure for draining the body fluid out of the human body;
the film sleeve comprises an inner film and an outer film, wherein the inner film is of a straight cylinder structure, the outer film is of a straight cylinder structure, the diameter of the outer film is larger than that of the inner film, the inner film is sleeved into the outer film, then two ends of the inner film are sealed, a plurality of small-size fan-shaped structures are arranged at the sealing positions, and the fan-shaped structures can be spliced into a circular ring-shaped structure;
the film sleeve is arranged on the guide wire, one end, close to the ball head structure, of the film sleeve is the front end of the sleeve, a connecting film (5) is arranged in the channel structure of the film sleeve and at the position of the front end of the sleeve, the breaking strength of the connecting film is smaller than that of the film sleeve, the connecting film comprises a head end side edge, a tail end side edge and a middle section, the head end side edge is adhered with the ball head structure, the tail end side edge is adhered with the film sleeve, and the length of the middle section is smaller than the maximum radius of the ball head structure;
the adhesion strength between the tail end side edge and the film sleeve is greater than the stretch-breaking strength of the connecting film and less than the stretch-breaking strength of the film sleeve;
the adhesion strength between the head end side edge and the ball head structure is smaller than the breaking strength of the connecting film;
an electrical assembly (4) for varying the fluid voltage within the thin film sleeve is provided at the rear end of the thin film sleeve;
the fluid is electrorheological fluid;
the rear end of the film sleeve is provided with a Venturi tube structure (6).
2. The novel urethral dilator according to claim 1, wherein,
the guide wire is a titanium alloy guide wire, and the ball head structure is a titanium alloy ball head structure.
3. The novel urethral dilator according to claim 2, wherein,
the ball head structure is arranged at the head end of the guide wire and is integrated with the guide wire.
4. A novel urethral dilator according to claim 3 wherein,
the ball head structure is a round ball head structure or a fusiform ball head structure;
the outer side face of the ball head structure is a smooth plane.
5. The novel urethral dilator according to claim 1, wherein,
the diameter range of the guide wire is 2mm-3mm, and the maximum diameter of the ball head structure is 0.5mm-1mm larger than the diameter of the guide wire.
6. The novel urethral dilator according to claim 1, wherein,
the diameter range of the outer side surface of the film sleeve is 2mm-4mm, the diameter range of the inner side surface of the film sleeve is 1mm-3mm, and the difference value between the diameter of the outer side surface and the diameter of the inner side surface is 0.5mm-1.5mm.
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| CN202210693802.XA CN115040764B (en) | 2022-06-18 | 2022-06-18 | Novel urethra dilator |
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| CN202210693802.XA CN115040764B (en) | 2022-06-18 | 2022-06-18 | Novel urethra dilator |
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Also Published As
| Publication number | Publication date |
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| CN115040764A (en) | 2022-09-13 |
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