CN110548210B - Catheter for preventing corner formed by decompression from damaging urethra - Google Patents
Catheter for preventing corner formed by decompression from damaging urethra Download PDFInfo
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- CN110548210B CN110548210B CN201910955344.0A CN201910955344A CN110548210B CN 110548210 B CN110548210 B CN 110548210B CN 201910955344 A CN201910955344 A CN 201910955344A CN 110548210 B CN110548210 B CN 110548210B
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- outer tube
- catheter
- urethra
- protection
- expansion part
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- 210000003708 urethra Anatomy 0.000 title claims abstract description 50
- 230000006837 decompression Effects 0.000 title abstract description 9
- 230000009471 action Effects 0.000 claims abstract description 15
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 15
- 230000002485 urinary effect Effects 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 230000006378 damage Effects 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000010410 layer Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000002627 tracheal intubation Methods 0.000 description 3
- 210000003932 urinary bladder Anatomy 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 210000005077 saccule Anatomy 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 210000002700 urine Anatomy 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
-
- 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
- A61M25/10—Balloon catheters
-
- 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
- A61M25/10—Balloon catheters
- A61M25/1018—Balloon inflating or inflation-control devices
-
- 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
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/04—Liquids
- A61M2202/0496—Urine
-
- 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
- A61M2210/1085—Bladder
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Child & Adolescent Psychology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- External Artificial Organs (AREA)
Abstract
The invention relates to a catheter for preventing a corner formed by pressure loss from damaging a urethra, which comprises an outer tube and a protection part arranged on the outer tube, wherein the outer tube is provided with an expansion part, the expansion part is arranged in the protection part, and the expansion part is used for penetrating through the protection part under the action of internal pressure and expanding outwards and is used for being contained in the protection part after losing the internal pressure; the catheter provided by the invention has the advantages that the structure is simple, the design is reasonable, in the actual use process, the expansion part of the outer tube can be expanded outwards and form the saccular bulge through pressurizing the outer tube so as to be clamped at the urethral orifice, the fixation of the catheter is realized, the falling-off of the catheter is avoided, the expansion part after the decompression and the deflation can be contained in the protection part when the catheter is dismantled, the sharp edges formed by the expansion part are prevented from being exposed out of the outer tube, and therefore, the direct contact between the edges and the urethra can be effectively avoided, and the purposes of protecting the urethra and improving the comfort of a patient are achieved.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a catheter for preventing a corner formed by decompression from damaging the urethra.
Background
A catheter is a tube inserted into the urinary bladder from the urethra to drain urine, and is generally made of soft materials such as natural rubber, silicone rubber or polyvinyl chloride (PVC), and is widely used in clinic.
The commonly used catheters in the prior art are divided into three types, namely a single-cavity catheter, a double-cavity catheter and a three-cavity catheter according to the structure, wherein the single-cavity catheter is provided with only one channel for catheterization, so that the catheter is inconvenient to fix and has short retention time; the double-cavity catheter is provided with two cavities, the two cavities are formed by two inner tubes and two outer tubes which are sleeved together, as shown in figure 1, the head end of the double-cavity catheter is provided with a liquid inlet communicated with the inner tube, and the tail end of the double-cavity catheter is respectively provided with a liquid outlet communicated with the inner tube and a valve (a valve for water injection or a valve for inflation) communicated with the outer tube; when the catheter is used, the head end of the double-cavity catheter is required to be inserted into the bladder through the urethra, after the catheter is inserted into place, the injector is communicated with the valve, air or water is injected into the outer tube by the injector, one end of the outer tube, which is close to the liquid inlet, protrudes outwards to form a balloon, as shown in the attached figure 2, so that the catheter is clamped at the urethra, the automatic falling of the double-cavity catheter can be effectively prevented, and when the catheter is required to be pulled out, the air or water in the outer tube is discharged through the valve, so that the protruding balloon can be eliminated, and the balloon can recover the original shape, thereby facilitating smooth tube pulling; compared with the double-cavity catheter, the three-cavity catheter is additionally provided with a medicine injection cavity, and is mainly used for occasions such as short-term indwelling catheterization, intravesical medicine liquid instillation, flushing, drainage and the like.
In order to facilitate the fixation and the anti-drop of the catheter, the technical scheme adopted in the patent related to the catheter disclosed in the prior art is as follows: the local area of the outer tube is inflated under the state of water injection or inflation to form a saccule (such as the outer tube in the double-cavity catheter) so as to be clamped at the urethral meatus, thereby realizing the fixation and the anti-drop of the catheter; although the fixing and anti-drop effects of the technical proposal in clinic are better, in the actual use process, no people pay attention to the fixing and anti-drop effects: when the water or air in the outer tube is removed (i.e. after the internal pressure is lost), the expanded area on the outer tube is difficult to recover to the original shape and the smoothness of the surface is difficult to maintain, in practice, the area is usually shrunken and forms one or more edges arranged along the circumferential direction, the edges extend along the length direction of the outer tube, and the edges are usually sharp and hard, which is very unfavorable for drawing the tube; as an example, when air or water in the outer tube as shown in fig. 2 is extracted, corners as shown in fig. 3 are formed in the area where the balloon is formed, and on one hand, the corners are very liable to cause damage to the urethra or even cause infection of the urethra during the tube drawing process; on the other hand, due to the non-smoothness of the outer tube, the patient may feel very uncomfortable during tube drawing; however, this problem has not been noticed by those skilled in the art, and an effective means for solving this problem has not been suggested.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the catheter, which can expand the local area outwards and form a saccular bulge through pressurizing the outer tube, realize the functions of fixing and preventing the catheter, and prevent the edge angle formed in the local area from being directly exposed after the outer tube is out of pressure, thereby effectively preventing the edge angle from being directly contacted with the urethra and achieving the purposes of protecting the urethra and improving the comfort of patients.
The technical scheme adopted by the invention is as follows:
the catheter comprises an outer tube and a protecting part arranged on the outer tube, wherein the protecting part is used for preventing the urethra from being damaged by the corner angle formed by the pressure loss, the outer tube is provided with an expansion part, the expansion part is arranged in the protecting part, and the expansion part is used for penetrating through the protecting part and expanding outwards under the action of internal pressure and is used for being contained in the protecting part after the internal pressure is lost. In the scheme, the protection part is arranged at the outer side of the expansion part, when the catheter is inserted in place and needs to be fixed, the expansion part arranged on the outer tube can be expanded outwards under the action of the inner pressure of the outer tube to form a saccular bulge, so that the catheter can be clamped at the urethral orifice of a patient, the fixation of the catheter is realized, the automatic falling-off of the catheter can be effectively avoided, and the purpose of falling prevention is achieved; when the catheter needs to be pulled out, the inner pressure of the outer tube needs to be released firstly, after the inner pressure of the outer tube is lost, the expansion part can be shrunken and automatically stored in the protection part, so that the edge angle formed after the expansion part is in the protection part after the expansion part is in a decompression state, namely, the protection part can achieve the purpose of isolating the expansion part through shielding the expansion part, thereby avoiding the edge angle from being in direct contact with the urethra, not only effectively protecting the urethra of a patient in the process of pulling out the catheter and avoiding the damage of the urethra, but also enabling the tube pulling process to be smoother, and effectively enhancing the comfort of the patient.
Preferably, the protecting portion is smoothly provided in the outer tube. Namely, the protecting part is not only fixed on the outer tube, but also has no edge angle or any unsmooth place between the protecting part and the outer tube, so that the catheter can not cause the damage of the urethra and the discomfort of a patient in the process of intubation and tube drawing.
Preferably, the protecting part comprises a protecting cylinder of a cylindrical structure, the protecting cylinder is made of hard materials, and the side wall of the protecting cylinder is provided with one or more through holes for the expanding part to expand outwards. The protection cylinder is made of hard materials, so that the influence on the shielding effect of the internal expansion part caused by larger deformation in the use process is avoided; because the outer tube is usually a circular tube, when the protection tube adopts a cylindrical structure, the seamless and smooth connection between the protection part and the outer tube can be realized, and the arrangement of the through holes is beneficial to the outward expansion of the expansion part and the formation of saccular bulge, so as to achieve the purpose of clamping the urethral orifice.
Preferably, the through holes are round holes or elliptical holes or strip-shaped holes. The shape of the through hole may be various as long as the requirement of the expansion portion for expanding outward can be satisfied.
Preferably, when the number of the through holes is plural, the through holes are uniformly distributed along the circumferential direction of the protection cylinder, respectively. After the expansion part expands under the action of the inner pressure of the outer tube, the protection cylinder can be respectively extended out through each through hole, and a plurality of saccular bulges are formed in the circumferential direction of the protection cylinder, so that the fixation of the catheter is more facilitated, and the anti-drop function is also more facilitated.
Further, the edge of the through hole is provided with arc transition. So as to eliminate the edge at the edge of the through hole, not only can avoid damaging the expansion part, but also can avoid damaging the urethra in the process of inserting/extracting the urinary catheter, thereby achieving the aim of further protecting the urethra.
Further, the outer diameter of the protection cylinder is equal to the outer diameter of the outer tube. Therefore, no edge angle or any unsmooth place exists between the protective cylinder and the outer tube, and the catheter can not cause the damage of the urethra and the discomfort of a patient in the process of intubation and tube drawing.
In one scheme, the outside of the protection cylinder is provided with a protection layer, the protection layer is connected with the outer tube, and the material of the protection layer is the same as that of the outer tube. The outer tube is usually made of soft rubber material, the protective layer is made of the same material as the outer tube, the texture is soft, the buffering function can be realized, the hard protective tube is prevented from being directly contacted with the urethra, and the manufacturing is convenient.
In another scheme, the protection cylinder is embedded in the outer tube, the outer tube is provided with an opening corresponding to the through hole, and the expansion part is arranged in the outer tube and corresponds to the protection cylinder. That is, in this embodiment, the expansion portion is not integrally formed with the outer tube, but is a film having elastic deformability and being provided separately in the outer tube, and the expansion portion can be expanded by the internal pressure to form a sac-like projection.
Preferably, the outer tube and/or the expansion part are/is made of rubber material, and the thickness of the expansion part is smaller than that of the outer tube. So that the expansion part has certain elasticity and can expand outwards under the action of certain internal pressure to form a saccular bulge.
In more perfect scheme, still include the inner tube, the inner tube set up in the inside of outer tube, the inner tube is used for the catheterization, and the one end of inner tube is provided with the inlet, and the other end is provided with the liquid outlet, keep away from on the outer tube the one end of expansion portion is provided with the valve, the valve is used for maintaining the interior pressure of outer tube.
Preferably, the valve is a water injection soft valve or an inflation valve.
Compared with the prior art, the catheter for preventing the corner formed by decompression from damaging the urethra has the advantages of simple structure and reasonable design, and in the actual use process, the expansion part of the outer tube can be expanded outwards and form a saccular bulge through pressurizing the outer tube so as to be clamped at the urethral orifice, thereby fixing the catheter and preventing the catheter from falling off, and the expansion part after decompression and shrinkage can be contained in the protection part when the catheter is dismantled, so that the sharp corner formed by the expansion part is prevented from being exposed out of the outer tube directly, the direct contact between the corner and the urethra can be effectively avoided, and the purposes of protecting the urethra and improving the comfort of a patient are achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a prior art dual-lumen catheter prior to use (a true photograph).
Fig. 2 is a schematic view of the catheter provided in fig. 1, in use, with a fluid injected into the outer tube to form a balloon-like bulge (a true photograph).
Fig. 3 is a schematic view (a true photograph) of the edges formed by the collapse of the bag-like protrusions after the release of the liquid in the outer tube (after the release of the internal pressure).
Fig. 4 is a schematic view showing the structure of a urinary catheter according to the embodiment 1 of the invention.
Fig. 5 is a partial schematic view of fig. 4.
Fig. 6 is a view in the A-A direction (schematic longitudinal section) of fig. 5.
Fig. 7 is a B-B view (schematic cross-sectional view) of fig. 5.
Fig. 8 is a schematic cross-sectional view of a urinary catheter according to example 1 of the present invention, in which the swelling portion swells outwardly under the action of internal pressure to form a sac-like bulge.
Fig. 9 is a schematic cross-sectional view of the catheter provided in fig. 8, with the expansion portion collapsing and forming an angle inside the protective sleeve after loss of internal pressure.
Fig. 10 is a schematic cross-sectional view of a urinary catheter according to example 1 of the invention, prior to use.
Fig. 11 is a schematic cross-sectional view of the catheter of fig. 10, shown with the inflatable portion inflated outwardly under internal pressure to form a balloon-like bulge.
Fig. 12 is a schematic cross-sectional view of the catheter provided in fig. 11, with the bulge portion collapsing and forming an angle inside the protective barrel after loss of internal pressure.
Fig. 13 is a schematic view showing a longitudinal cross-sectional structure of another urinary catheter provided in embodiment 1 of the invention.
Fig. 14 is a schematic view showing a longitudinal cross-sectional structure of a urinary catheter according to an embodiment 2 of the invention.
Fig. 15 is a schematic cross-sectional structure of fig. 14.
Description of the drawings
Outer tube 100, bladder 101, corner 102, valve 103,
An inner pipe 200, a liquid inlet 201, a liquid outlet 202,
An expansion part 300,
A protection part 400, a protection barrel 401, a through hole 402, an arc transition 403 and a protection layer 404.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
Example 1
Referring to fig. 4, 5, 6 and 7, the present embodiment provides a catheter for preventing a corner formed by pressure loss from damaging a urethra, which comprises an outer tube 100 and a protecting portion 400 disposed on the outer tube 100, wherein the outer tube 100 is provided with an expansion portion 300, the expansion portion 300 is disposed inside the protecting portion 400, and the expansion portion 300 is used for penetrating through the protecting portion 400 under the action of internal pressure and expanding outwards, and is used for being accommodated in the protecting portion 400 after losing the internal pressure. In the scheme provided by the embodiment, the protection part 400 is arranged at the outer side of the expansion part 300, when the catheter is inserted in place and needs to be fixed, the expansion part 300 arranged on the outer tube 100 can be expanded outwards under the action of the inner pressure of the outer tube 100 (the inner pressure can be formed by injecting water or inflating into the outer tube 100) to form the saccular bulge 101, so that the catheter can be clamped at the urethral orifice of a patient, the fixation of the catheter is realized, the automatic falling-off of the catheter can be effectively avoided, and the purpose of preventing falling is achieved; when the catheter needs to be pulled out, the internal pressure of the outer tube 100 needs to be released firstly, after the internal pressure of the outer tube 100 is lost, the expansion part 300 is shrunken and automatically stored in the protection part 400, so that the edge angle 102 formed after the expansion part 300 is in decompression is hidden in the protection part 400, namely, the protection part 400 can achieve the purpose of isolating the expansion part 300 by shielding the expansion part 300, thereby avoiding the edge angle 102 from being in direct contact with the urethra, not only effectively protecting the urethra of a patient in the process of pulling out the catheter, avoiding the injury of the urethra, but also enabling the tube pulling process to be smoother, and effectively enhancing the comfort of the patient.
As described in the background art, as shown in fig. 1, 2 and 3, and combined with clinical trials, the conventional urinary catheter is pressurized to form a saccular protrusion 101, and after the urinary catheter is deflated by decompression, an edge 102 is necessarily formed on the outer tube 100, as shown in fig. 3, and in order to eliminate the effect of the edge 102, those skilled in the art will easily think of some conventional solutions, but these solutions generally cannot completely, thoroughly and effectively solve the problem; for example, one approach is: the thickness of the expansion 300 can be reduced so that the resulting corner 102 has less rigidity, and although the damage to the urethra can be reduced, the effect of the corner 102 on the urethra cannot be completely eliminated; as another example, another scheme is: the internal pressure value (namely, the water injection amount or the inflation amount) is strictly controlled, so that the internal pressure is kept in a proper range, the expansion part 300 can form the saccular bulge 101 under the action of the internal pressure, the expansion part 300 can be prevented from being excessively expanded, more serious inelastic deformation occurs, the edge angle 102 formed after the internal pressure is lost is sharper and wider, but in actual operation, the water injection amount and the inflation amount are difficult to be controlled by medical staff very accurately, so that the formation of the edge angle 102 cannot be completely avoided, the problems in the prior art cannot be effectively solved, the problem in the background art is not illustrated one by one any more, and the technical scheme provided in the embodiment can thoroughly and effectively eliminate the influence of the edge angle 102 on the urethra and a patient by arranging the protection part 400 to isolate the expansion part 300.
In a preferred embodiment, the protecting portion 400 is smoothly disposed on the outer tube 100, as shown in fig. 4. That is, the protecting part 400 is not only fixed to the outer tube 100, but also there is no corner 102 or any uneven place between the protecting part 400 and the outer tube 100, so that the urinary catheter will not cause damage to the urethra and discomfort to the patient during the insertion and extraction of the catheter.
In a preferred implementation manner provided in this embodiment, the protection part 400 includes a protection cylinder 401 with a cylindrical structure, as shown in fig. 4 to 12, where the protection cylinder 401 is made of a hard material, so as to avoid large deformation during use, thereby affecting the shielding effect on the internal expansion part 300; the side wall of the protection cylinder 401 is provided with one or more through holes 402, and the through holes 402 are used for the expansion part 300 to expand outwards; because the outer tube 100 is usually a circular tube, when the protection tube 401 adopts a cylindrical structure, seamless and smooth connection between the protection part 400 and the outer tube 100 can be realized, and the arrangement of the through holes 402 is beneficial to the outward expansion of the expansion part 300 and the formation of the saccular protrusion 101, so as to achieve the purpose of blocking the urethral orifice. As an example, as shown in fig. 4 to 9, the side wall of the protection cylinder 401 may be provided with one through hole 402, two through holes 402, and three through holes 402 and … … through holes 402, which may be the number of through holes 402 according to the actual situation; in a further aspect, when the number of the through holes 402 is plural, the through holes 402 may be uniformly distributed along the circumferential direction of the protection cylinder 401, respectively. After the expansion part 300 expands under the action of the internal pressure of the outer tube 100, the protection cylinder 401 can be extended out through each through hole 402, and a plurality of saccular protrusions 101 are formed in the circumferential direction of the protection cylinder 401, which is more beneficial to fixing the catheter and preventing the catheter from falling off.
In the present embodiment, the shape of the through hole 402 is not limited, so the shape of the through hole 402 may be various as long as the requirement of the expansion portion 300 expanding outwards can be met, but in a preferred embodiment, the through hole 402 may be a circular hole, an elliptical hole or an elongated hole.
As an example, as shown in fig. 4 to 9, a circular through hole 402 is formed on the side surface of the protection cylinder 401; under the action of the internal pressure, the expansion part 300 may extend out of the protective cylinder 401 through the circular through hole 402, and form the saccular protrusion 101 outside the protective cylinder 401, as shown in fig. 8; when the internal pressure of the outer tube 100 is reduced, the bag-like protrusion 101 collapses and automatically retracts into the interior of the protective tube 401, and even if the corner 102 is formed on the expansion portion 300, the corner 102 is necessarily inside the protective tube 401, so that the protective tube 401 can isolate the corner 102 from the urethra, thereby completely and completely eliminating the influence of the corner 102 on the urethra and the patient.
As another example, the side surface of the protection cylinder 401 is provided with three circular through holes 402, and the three circular through holes 402 are uniformly distributed along the circumferential direction of the protection cylinder 401, as shown in fig. 10 to 12; under the action of the internal pressure, the expansion part 300 may extend out of the protective cylinder 401 through the circular through hole 402, and form three saccular protrusions 101 outside the protective cylinder 401, as shown in fig. 12; when the internal pressure of the outer tube 100 is reduced, the bag-like protrusions 101 collapse and automatically retract into the interior of the protective tube 401, and even if the corners 102 (typically three corners 102) are formed on the expansion 300, the corners 102 are necessarily inside the protective tube 401, so that the protective tube 401 can isolate all the corners 102 from the urethra, thereby completely and completely eliminating the influence of the corners 102 on the urethra and the patient.
In a further aspect, the edge of the through hole 402 is provided with an arc transition 403, as shown in fig. 7 or 10; so as to eliminate the edge at the edge of the through hole 402, not only can avoid damaging the expansion part 300, but also can avoid damaging the urethra in the process of inserting/extracting the urinary catheter, thereby achieving the purpose of further protecting the urethra.
As shown in fig. 6 to 12, in a preferred embodiment, the outer diameter of the protective cylinder 401 is equal to the outer diameter of the outer tube 100. So that the protective cylinder 401 and the outer tube 100 have no edge angle 102 or any unsmooth place, and the catheter can not cause the damage of the urethra and the discomfort of a patient in the process of intubation and extubation.
The expansion part 300 may be preferably made of a rubber material so as to have elastic deformability, and may be elastically deformed to expand by an internal pressure; in a preferred embodiment, the outer tube 100 and/or the expansion portion 300 may be made of rubber materials, and the thickness of the expansion portion 300 is smaller than that of the outer tube 100, as shown in fig. 6-12, so that the expansion portion 300 is more conveniently expanded outwards under a certain pressure to form the saccular protrusion 101.
In a further aspect provided by this embodiment, a protection layer 404 is disposed on the outer side of the protection cylinder 401, as shown in fig. 13, the protection layer 404 is connected to the outer tube 100, and the protection layer 404 is made of the same material as the outer tube 100. The outer tube 100 is usually made of soft rubber material, and the protective layer 404 can be made of the same material as the outer tube 100, has soft texture, can realize the function of buffering, prevents the hard protective tube 401 from directly contacting with the urethra, is convenient to manufacture, and has low cost.
As shown in fig. 4 and 5, in a more perfect solution, the catheter further includes an inner tube 200, the inner tube 200 is disposed inside the outer tube 100, the inner tube 200 is used for catheterization, one end of the inner tube 200 is provided with a liquid inlet 201, the other end is provided with a liquid outlet 202, one end of the outer tube 100 away from the expansion portion 300 is provided with a valve 103 (or called a joint), and the valve 103 is used for maintaining the internal pressure of the outer tube 100. It will be appreciated that the valve 103 may be a water-filled soft valve or an inflation valve as commonly used in existing catheters; so that when the catheter is used, a medical staff can connect the valve 103 by using the syringe and fill water or ventilate the outer tube 100 by using the syringe, so that the internal pressure of the inner tube 200 is increased, the expansion part 300 can expand under the action of the internal pressure to form the saccular protrusion 101, and after the medical staff takes down the syringe, the valve 103 is automatically closed, so that the pressure in the outer tube 100 is kept unchanged, the size of the saccular protrusion 101 is kept unchanged, and the catheter can be stably arranged in the urethra for a long time; when the catheter needs to be removed, a medical staff needs to connect the valve 103 from a new syringe, and draw out water or air in the outer tube 100 by using the syringe, so as to reduce the internal pressure of the outer tube 100, so that the expansion part 300 can be shrunken and retracted into the protection tube 401, thereby facilitating smooth removal of the catheter.
Example 2
The main difference between the present embodiment 2 and the above embodiment 1 is that, in the catheter provided in this embodiment, the protection tube 401 is embedded in the outer tube 100, the outer tube 100 is provided with an opening corresponding to the through hole 402, and the expansion portion 300 is disposed in the outer tube 100 and at a position corresponding to the protection tube 401; as shown in fig. 14 and 15, in this embodiment, instead of being integrally formed with the outer tube 100, the expansion part 300 may be a membrane that is separately disposed in the outer tube 100 and has elastic deformation capability, and under the action of the internal pressure, the expansion part 300 may expand and extend out of the outer tube 100 through the through hole 402 and the opening to form a bag-shaped protrusion 101, so as to fix the urinary catheter and prevent the urinary catheter from falling off automatically, in this process, the shape of the outer tube 100 may not be changed, and after the outer tube 100 is decompressed, the bag-shaped protrusion 101 collapses and automatically retracts inside the protection tube 401, and the protection tube 401 forms a corner 102, and at this time, the protection tube 401 may isolate the expansion part 300 from the urethra, thereby thoroughly and completely eliminating the influence of the corner 102 on the urethra and the patient.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention.
Claims (7)
1. The catheter is characterized by comprising an outer tube and a protection part arranged on the outer tube, wherein the outer tube is provided with an expansion part, the expansion part is arranged in the protection part, and the expansion part is used for penetrating through the protection part and expanding outwards under the action of internal pressure and is used for being contained in the protection part after losing the internal pressure;
the protection part comprises a protection cylinder of a cylindrical structure, the protection cylinder is made of hard materials, one or more through holes are formed in the side wall of the protection cylinder, the through holes are used for allowing the expansion part to expand outwards, the protection part is smoothly arranged in the outer tube, the outer diameter of the protection part is equal to that of the outer tube, or the protection cylinder is embedded in the outer tube, an opening corresponding to the through holes is formed in the outer tube, and the expansion part is arranged in the outer tube and corresponds to the position of the protection cylinder.
2. The urinary catheter for preventing an angle formed by a loss of pressure from damaging a urethra according to claim 1, wherein said through-hole is a circular hole or an elliptical hole or an elongated hole.
3. The urinary catheter for preventing damage to the urethra due to an angular step formed by a loss of pressure according to claim 1, wherein when the number of said through holes is plural, the through holes are uniformly distributed along the circumferential direction of said protective cylinder, respectively.
4. The urinary catheter for preventing an angle formed by a loss of pressure from damaging a urethra according to claim 1, wherein the edge of said through hole is provided with an arcuate transition.
5. The catheter for preventing an edge angle formed by a pressure loss from damaging a urethra according to any one of claims 1 to 4, wherein a protective layer is arranged on the outer side of the protective cylinder, the protective layer is connected with the outer tube, and the protective layer is made of the same material as the outer tube.
6. A catheter for preventing damage to the urethra due to an angle formed by loss of pressure according to any one of claims 1-4, wherein said outer tube and/or said expansion portion are each made of a rubber material, and wherein the thickness of said expansion portion is smaller than the thickness of said outer tube.
7. The catheter for preventing an edge angle formed by a pressure loss from damaging a urethra according to any one of claims 1 to 4, further comprising an inner tube provided in the inside of the outer tube, the inner tube being for catheterization, one end of the inner tube being provided with a liquid inlet, the other end being provided with a liquid outlet, one end of the outer tube away from the expansion portion being provided with a valve for maintaining the internal pressure of the outer tube.
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| CN201910955344.0A CN110548210B (en) | 2019-10-09 | 2019-10-09 | Catheter for preventing corner formed by decompression from damaging urethra |
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| CN201910955344.0A CN110548210B (en) | 2019-10-09 | 2019-10-09 | Catheter for preventing corner formed by decompression from damaging urethra |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6613067B1 (en) * | 2000-06-06 | 2003-09-02 | Scimed Life Systems, Inc. | Balloon protector |
| CN201030133Y (en) * | 2007-03-29 | 2008-03-05 | 上海市第八人民医院 | Urinary catheter placer |
| CN103930158A (en) * | 2011-10-07 | 2014-07-16 | W.L.戈尔及同仁股份有限公司 | Balloon assemblies having controllably variable topographies |
| CN107106822A (en) * | 2014-11-17 | 2017-08-29 | 夸超脉管私人有限公司 | Balloon catheter system |
| CN207041734U (en) * | 2017-01-20 | 2018-02-27 | 苏州宇度医疗器械有限责任公司 | Anti- infection Foley catheter |
| CN211584805U (en) * | 2019-10-09 | 2020-09-29 | 四川省肿瘤医院 | Catheter capable of preventing edges and corners from directly contacting urethra |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9199066B2 (en) * | 2010-03-12 | 2015-12-01 | Quattro Vascular Pte Ltd. | Device and method for compartmental vessel treatment |
-
2019
- 2019-10-09 CN CN201910955344.0A patent/CN110548210B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6613067B1 (en) * | 2000-06-06 | 2003-09-02 | Scimed Life Systems, Inc. | Balloon protector |
| CN201030133Y (en) * | 2007-03-29 | 2008-03-05 | 上海市第八人民医院 | Urinary catheter placer |
| CN103930158A (en) * | 2011-10-07 | 2014-07-16 | W.L.戈尔及同仁股份有限公司 | Balloon assemblies having controllably variable topographies |
| CN107106822A (en) * | 2014-11-17 | 2017-08-29 | 夸超脉管私人有限公司 | Balloon catheter system |
| CN207041734U (en) * | 2017-01-20 | 2018-02-27 | 苏州宇度医疗器械有限责任公司 | Anti- infection Foley catheter |
| CN211584805U (en) * | 2019-10-09 | 2020-09-29 | 四川省肿瘤医院 | Catheter capable of preventing edges and corners from directly contacting urethra |
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| CN110548210A (en) | 2019-12-10 |
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