CN117426834A - Catheter set - Google Patents
Catheter set Download PDFInfo
- Publication number
- CN117426834A CN117426834A CN202311754206.9A CN202311754206A CN117426834A CN 117426834 A CN117426834 A CN 117426834A CN 202311754206 A CN202311754206 A CN 202311754206A CN 117426834 A CN117426834 A CN 117426834A
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- China
- Prior art keywords
- inner tube
- outer tube
- stop
- liquid outlet
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007788 liquid Substances 0.000 claims abstract description 115
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 238000011282 treatment Methods 0.000 description 8
- 238000005086 pumping Methods 0.000 description 7
- 238000001802 infusion Methods 0.000 description 6
- 239000003146 anticoagulant agent Substances 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 5
- 239000003814 drug Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000002537 thrombolytic effect Effects 0.000 description 5
- 208000007536 Thrombosis Diseases 0.000 description 3
- 239000002872 contrast media Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 2
- 208000005189 Embolism Diseases 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920002614 Polyether block amide Polymers 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012377 drug delivery Methods 0.000 description 1
- 239000003527 fibrinolytic agent Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Classifications
-
- 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
- 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
- A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
-
- 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
- A61B2017/22038—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 with a guide wire
- A61B2017/22042—Details of the tip of the guide wire
- A61B2017/22044—Details of the tip of the guide wire with a pointed tip
-
- 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
- A61B2017/22082—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 after introduction of a substance
- A61B2017/22084—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 after introduction of a substance stone- or thrombus-dissolving
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Surgery (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention provides a catheter kit, which relates to the technical field of medical appliances, and comprises: the inner tube is provided with a first stop part, and the first stop part and the inner side wall of the outer tube in the circumferential direction of the inner tube form a first opening; a first liquid outlet is formed in the pipe wall of the outer pipe; the inner part of the far end of the inner tube is provided with a second stop part, and the second stop part and the inner wall of the inner tube in the circumferential direction of the second stop part form a second opening; a second liquid outlet is formed in the pipe wall of the inner pipe; the inner pipe is provided with a liquid inlet; the inner pipe is positioned in the outer pipe and is coaxially arranged; the inner tube is movable relative to the outer tube to a first state, a second state, and a third state.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a catheter kit.
Background
There are often three modes of use for prior art thrombolytic therapy during treatment: 1. acute treatment phase: the aim of quickly dredging fresh thrombus is fulfilled by manually pumping or quickly pushing and injecting large-dose thrombolytic liquid medicine; 2. slow infusion treatment period: performing a slow infusion or instillation mode for 3-7 days for catheterization treatment to achieve the aim of final dredging; 3. treatment observation period: contrast diagnosis is performed by injecting a contrast medium at a high pressure. However, the existing thrombolytic catheter cannot take into account the three modes.
Disclosure of Invention
The invention aims to provide a catheter kit for relieving the technical problem that a thrombolytic catheter cannot take into account multiple modes and cannot adapt to the current treatment flow.
The present invention provides a catheter kit comprising:
the inner side wall of the outer tube in the circumferential direction of the outer tube is provided with a first opening; a first liquid outlet is formed in the pipe wall of the outer pipe;
the inner tube, the inside of the distal end of the inner tube has second stop parts, the second stop parts and inner wall of inner tube in its circumference enclose the second opening; a second liquid outlet is formed in the pipe wall of the inner pipe; the inner pipe is provided with a liquid inlet;
the inner pipe is positioned in the outer pipe and is coaxially arranged;
the inner tube is movable relative to the outer tube to a first state, a second state, and a third state;
in the first state, the first stop part is completely staggered with the second opening, and the second stop part is completely staggered with the first opening;
in the second state, the first stop portion shields a portion of the second opening, and the second stop portion shields a portion of the first opening;
in the third state, the first stop part shields the second opening, and the second stop part shields the first opening;
and in the second state and the third state, the first liquid outlet and the second liquid outlet are communicated.
Further, the first stop portion includes at least two first stops disposed along a circumferential direction, and/or the second stop portion includes at least two second stops disposed at intervals along the circumferential direction.
Further, the inner tube is axially movable relative to the outer tube;
the inner side wall of the outer tube is provided with a positioning protrusion protruding inwards, and the positioning protrusion is used for being abutted with the outer side wall of the distal end of the inner tube.
Further, the positioning bulge is annular, and the annular positioning bulge and the outer tube are coaxially arranged;
or the positioning bulge comprises at least two first bulge units which are arranged at intervals along the circumferential direction, a groove structure is formed between every two adjacent first bulge units, and a second bulge unit which is used for being correspondingly inserted with the groove structure is arranged on the outer side wall of the far end of the inner tube;
alternatively, the inner tube is rotatable relative to the outer tube, and the positioning projection comprises a spiral projection extending helically in an axial direction, and a distance of a top of the spiral projection from an axis of the outer tube gradually decreases from a proximal end toward a distal end.
Further, the first stop portion and the second stop portion are respectively provided with an interlocking structure, and the interlocking structure is used for locking the first stop portion and the second stop portion in the axial direction.
Further, the interlocking structure comprises a first magnet arranged on the first stop part and a second magnet arranged on the second stop part;
or the inner pipe can rotate relative to the outer pipe, the interlocking structure comprises a first lock catch arranged on the first stop part and a second lock catch arranged on the second stop part, and the first lock catch and the second lock catch realize locking through rotation;
or, the inner tube can move along the axial direction relative to the outer tube, and the interlocking structure comprises a first concave-convex structure arranged on the first stop part and along the axial direction and a second concave-convex structure arranged on the second stop part and along the axial direction, and the first concave-convex structure and the second concave-convex structure are spliced along the axial direction.
Further, the first liquid outlet comprises a plurality of through holes which are arranged on the wall of the outer tube along a spiral line;
or at the same axial position, the number of through holes on the wall of the outer tube is at least two; the through holes at the same axial position form liquid outlet groups, and the number of the liquid outlet groups is at least two along the axial direction;
or the first liquid outlet comprises a first porous structure arranged on the wall of the outer pipe, and the second liquid outlet comprises a second porous structure; the number of the through holes forming the first porous structure is larger than that of the through holes forming the second liquid outlet, and the arrangement form of the through holes forming the first porous structure covers the arrangement form of the through holes forming the second liquid outlet; when the through holes forming the second porous structure are aligned with the through holes forming the first porous structure, the outer tube discharges liquid in the arrangement mode of the second porous structure; when the inner pipe and the first liquid outlet are staggered and the second opening is in an open state, the outer pipe discharges liquid in the arrangement mode of the first porous structure;
or the first liquid outlet comprises at least two first porous structures arranged on the wall of the outer pipe, and the arrangement forms of the through holes forming the first porous structures in each first porous structure are different; the second liquid outlet comprises a second porous structure, and the arrangement forms of the through holes forming the second liquid outlet can cover the arrangement forms of the through holes in all the first porous structures, so that the second porous structures can be aligned with any one of the first porous structures respectively.
Further, the outer tube is in threaded connection with the inner tube;
or, a limit chute extending along the axial direction of the inner pipe is arranged on the outer wall of the inner pipe, and a sliding block in sliding connection with the limit chute is arranged on the inner wall of the outer pipe; in the axial direction, the projection of the first stop part towards the distal end face of the inner tube completely covers the second opening, and the projection of the second stop part towards the distal end face of the outer tube completely covers the first opening, so that the inner tube is switched among a first state, a second state and a third state in a sliding manner.
Further, an indication mark is arranged on the inner tube and/or the outer tube and used for indicating the current state of the inner tube.
Further, a lubricating material is coated between the outer surface of the inner tube and the inner surface of the outer tube.
The invention has at least the following advantages or beneficial effects:
the present invention provides a catheter kit comprising: the inner tube is provided with a first stop part, and the first stop part and the inner side wall of the outer tube in the circumferential direction of the inner tube form a first opening; a first liquid outlet is formed in the pipe wall of the outer pipe; the inner part of the far end of the inner tube is provided with a second stop part, and the second stop part and the inner wall of the inner tube in the circumferential direction of the second stop part form a second opening; a second liquid outlet is formed in the pipe wall of the inner pipe; the inner pipe is provided with a liquid inlet; the inner pipe is positioned in the outer pipe and is coaxially arranged; the inner tube is movable relative to the outer tube to a first state, a second state, and a third state; in the first state, the first stop part is completely staggered with the second opening, and the second stop part is completely staggered with the first opening; in the second state, the first stop portion shields a portion of the second opening, and the second stop portion shields a portion of the first opening; in the third state, the first stop part shields the second opening, and the second stop part shields the first opening; and in the second state and the third state, the first liquid outlet and the second liquid outlet are communicated.
The operator can make the inner tube be in the first state through rotating or pushing and pulling the inner tube, and at this time, the first stop part is completely staggered with the second opening, and the second stop part is completely staggered with the first opening, that is, the first opening and the second opening are in the completely opened passage state, and the catheter kit can be used for high-pressure infusion of contrast medium and output from the distal end of the catheter kit. The operator can rotate or push and pull the inner tube again to enable the inner tube to be in a second state, at the moment, the first stop part shields a part of the second opening, and the second stop part shields a part of the first opening, namely, a part of the first opening is opened, a part of the first opening is closed, a part of the second opening is opened, and a part of the second opening is closed; after the liquid in the inner tube can flow out from the first liquid outlet through the second liquid outlet, the device can be used for slowly infusing thrombolytic liquid medicine, ensures that a small amount of liquid is leaked out from the distal end of the outer tube while the liquid is discharged from the tube wall of the outer tube, and reduces the risk of the distal thrombus reformation of the catheter caused by the clinical slow infusion process. The operator can also rotate or push and pull the inner tube again to enable the inner tube to be in a third state, at the moment, the first stop part shields the second opening, the second stop part shields the first opening, the first opening and the second opening are completely shielded to form an open circuit, and no liquid flows out from the far end of the outer tube. The liquid in the inner tube flows out from the first liquid outlet completely, can be used for mechanical continuous pumping, and ensures that the liquid medicine is transferred into the target area most efficiently during pumping. By rotating or pushing and pulling the inner tube, the catheter kit can adapt to three different treatment means, and the applicability of the catheter kit is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a catheter kit according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the position A of FIG. 1;
FIG. 3 is a schematic view of another state of the catheter kit according to the embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of the B position of FIG. 3;
FIG. 5 is a schematic view of a first state of a first catheter kit according to an embodiment of the present invention;
FIG. 6 is a schematic illustration of a second state of a first catheter kit according to an embodiment of the present invention;
FIG. 7 is a schematic view of a third state of the first catheter kit according to the embodiment of the present invention;
FIG. 8 is a schematic view of a first state of a second catheter kit according to an embodiment of the present invention;
FIG. 9 is a schematic view of a second state of a second catheter kit according to an embodiment of the present invention;
FIG. 10 is a schematic view of a third state of a second catheter kit according to an embodiment of the present invention;
FIG. 11 is a schematic view of a third embodiment of a catheter kit according to the present invention;
FIG. 12 is a schematic view of a third catheter kit according to an embodiment of the present invention in a second state;
FIG. 13 is a schematic view of a third state of a third catheter kit according to an embodiment of the present invention;
FIG. 14 is a schematic view of a fourth embodiment of a catheter kit according to the present invention in a first state;
FIG. 15 is a schematic view of a fifth catheter kit according to an embodiment of the present invention;
FIG. 16 is a schematic view of the distal end of an inner tube of a sixth catheter kit provided by an embodiment of the invention;
FIG. 17 is a schematic view of the distal end of an outer tube of a sixth catheter kit provided in accordance with an embodiment of the present invention;
FIG. 18 is a schematic view of the distal end of an outer tube of a seventh catheter kit provided in accordance with an embodiment of the present invention;
FIG. 19 is a developed view of an outer tube of an eighth catheter kit provided by an embodiment of the present invention;
FIG. 20 is a developed view of an outer tube of a ninth catheter kit provided by an embodiment of the present invention;
FIG. 21 is a developed view of an outer tube of a tenth catheter kit provided by an embodiment of the present invention;
FIG. 22 is a schematic view of an eleventh catheter kit according to an embodiment of the present invention;
FIG. 23 is a schematic view of a twelfth catheter-kit according to an embodiment of the present invention;
FIG. 24 is a schematic view of the distal end of the inner tube of a twelfth catheter set provided by an embodiment of the invention;
FIG. 25 is a schematic view of the distal end of the outer tube of a twelfth catheter set provided by an embodiment of the invention;
FIG. 26 is a schematic illustration of a thirteenth catheter set provided by an embodiment of the invention.
Icon: 100-an outer tube; 110-a first stop; 111-a first stop; 120-a first opening; 130-a first liquid outlet; 140-a second thread structure; 150-reducing front end; 160-reducing section; 170-a reducing rear section; 181-ring structure; 182-first bump units; 183-groove structure; 184-helical protrusion; 190-slide block;
200-inner tube; 210-a second stop; 220-a second opening; 230-a liquid inlet; 240-a first thread formation; 250-second bump units; 260-a second outlet; 270-limiting sliding grooves;
310-a first latch; 320-a second shackle; 410-a first relief structure; 420-second relief structure.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. 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 those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. 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.
In particular, in the present invention, the end of the catheter set close to the operator is the proximal end of the catheter set during surgery, and the opposite end far away from the operator is the distal end.
As shown in fig. 1, the catheter kit provided by the present invention includes: the outer tube 100 and the inner tube 200 are positioned inside the outer tube 100, the outer diameter of the inner tube 200 is approximately equal to the inner diameter of the outer tube 100, or the outer diameter of the inner tube 200 is slightly smaller than the inner diameter of the outer tube 100, so that the problem of unsmooth rotation or push-pull is avoided, wherein in the drawing, in order to conveniently observe the structures of the outer tube 100 and the inner tube 200, the gap between the outer tube 100 and the inner tube 200 is enlarged.
As shown in fig. 1 and 2, the inside of the distal end of the outer tube 100 is provided with a first stopper 110, and the first stopper 110 encloses a first opening 120 with the inner side wall of the outer tube 100 in the circumferential direction thereof. A first liquid outlet 130 is provided in the wall of the outer tube 100, the first liquid outlet 130 being provided between the first stop 110 and the proximal end of the outer tube 100. The first liquid outlet 130 may be a single opening, or may be formed by a plurality of holes or slits.
As shown in fig. 2, the distal end of the inner tube 200 is internally provided with a second stopper 210, and the second stopper 210 and the inner wall of the inner tube 200 in the circumferential direction thereof enclose a second opening 220 as a port for liquid output or guide wire. The second stop 210 may be complementary to the first opening 120, and the second opening 220 may be complementary to the first stop 110, complementary fingers: the shape and size are identical. The second liquid outlet 260 is arranged on the pipe wall of the inner pipe 200, and the second liquid outlet 260 can lead out the liquid in the inner pipe 200 to the outer side of the inner pipe 200.
As shown in fig. 1, the proximal end of the inner tube 200 is provided with fluid inlets 230, and the number of fluid inlets 230 may be, but is not limited to, one, two or three, with the fluid inlets 230 being adapted for connection to a drug delivery device.
The inner tube 200 can be rotated, or pushed and pulled to switch among the first state, the second state and the third state.
As shown in fig. 5, the operator may rotate the inner tube 200 to make the inner tube 200 in the first state, where the first stopper 110 is completely staggered from the second opening 220, and the second stopper 210 is completely staggered from the first opening 120, that is, the first stopper 110 and the second stopper 210 overlap, and the first opening 120 and the second opening 220 are in the completely opened access state; the first liquid outlet 130 and the second liquid outlet 260 may be completely staggered, or the first liquid outlet 130 and the second liquid outlet 260 may be at least partially overlapped, that is, the liquid in the inner tube 200 cannot or seldom flow out of the first liquid outlet 130 through the second liquid outlet 260, and the catheter kit at this time may be used for high-pressure infusion of contrast medium.
As shown in fig. 6, the operator may rotate the inner tube 200 again to make the inner tube 200 in the second state, where the first stopper 110 covers a portion of the second opening 220, and the second stopper 210 covers a portion of the first opening 120, that is, a portion of the first opening 120 is open, a portion is closed, a portion of the second opening 220 is open, and a portion is closed; the first liquid outlet 130 overlaps with a part of the second liquid outlet 260, that is, the liquid in the inner tube 200 can also flow out from the first liquid outlet 130 overlapped with the second liquid outlet 260 through the second liquid outlet 260, so that the thrombolytic drug solution can be slowly infused, the liquid is ensured to leak out from the distal end of the outer tube 100 while the liquid is ensured to be discharged from the wall of the outer tube 100, and the risk of the thrombus reformation at the distal end of the catheter caused by the clinical slow infusion process is reduced. Wherein, when the catheter hub is in the second state of the inner tube 200, the area where the first opening 120 and the second opening 220 overlap may be 1/100-1/10 of the inner cross-sectional area of the outer tube 100.
As shown in fig. 7, the operator may rotate the inner tube 200 again to make the inner tube 200 in the third state, where the first stopper 110 blocks the second opening 220, the second stopper 210 blocks the first opening 120, the first opening 120 and the second opening 220 are completely blocked to form an open circuit, and no liquid flows out from the distal end of the outer tube 100. The first liquid outlet 130 and the second liquid outlet 260 can be completely aligned, and the liquid in the inner tube 200 completely flows out from the first liquid outlet 130, so that the liquid can be used for mechanical continuous pumping (the pressure is usually 100kPa-1000 kPa), and the liquid medicine can be ensured to be transferred into a target area most efficiently during pumping.
In summary, by rotating the inner tube 200, the catheter set can be adapted to three different treatments, increasing the applicability of the catheter set.
In one embodiment, as shown in fig. 8-10, the first stop 110 may be a complete valve, such as a semicircular valve, having an area that is half the cross-sectional area of the outer tube 100 in the deployed position. Likewise, the second stop portions 210 are disposed in the same manner.
In another embodiment, as shown in fig. 11-13, the first stopping portion 110 may include at least two first stopping members 111 disposed along a circumferential direction, where the first stopping members 111 are valves, and the first stopping members 111 disposed along a circumferential direction may be disposed continuously or at intervals. Likewise, the second stop portions 210 are disposed in the same manner.
In other embodiments, as shown in fig. 14, the first stop 110 and the second stop 210 may be irregularly shaped, so long as the second stop 210 is complementary to the first opening 120, and the second opening 220 is complementary to the first stop 110.
As shown in fig. 1 to 4, the inner tube 200 can move in an axial direction relative to the outer tube 100 in a spiral manner, and in this embodiment, the proximal end of the inner tube 200 has a first screw structure 240, and the proximal end of the outer tube 100 has a second screw structure 140, so that the two screw structures are connected, and the inner tube 200 moves in an axial direction while rotating relative to the outer tube 100.
In other embodiments, as shown in fig. 26, axial movement between the outer tube 100 and the inner tube 200 may also be achieved by a limit chute 270 and a slide block 190. Specifically, a limiting chute 270 extending along the axial direction of the outer wall of the inner tube 200 is provided on the outer wall of the outer tube 100, and a sliding block 190 slidably connected with the limiting chute 270 is provided on the inner wall of the outer tube 100; in the axial direction, the projection of the first stop 110 toward the distal end face of the inner tube 200 completely covers the second opening 220, and the projection of the second stop 210 toward the distal end face of the outer tube 100 completely covers the first opening 120. In use, the operator can switch states by pushing and pulling the inner tube 200, for example, the operator can push the inner tube 200 distally to the limit position, at which time the first stop portion 110 completely blocks the second opening 220, the second stop portion 210 completely blocks the first opening 120, and the inner tube 200 is in the third state; after the inner tube 200 is pulled slightly to the proximal side, the first opening 120 and the second opening 220 are gradually opened from the shielded state, and the inner tube 200 is in the second state. When inner tube 200 is continuously pulled proximally, first opening 120 and second opening 220 may be fully opened, with inner tube 200 in the first state.
As shown in fig. 2, the distal end of the outer tube 100 may have a tapered structure, which includes a tapered front end 150, a tapered section 160, and a tapered rear section 170 sequentially connected from the proximal end toward the distal direction, and the tapered front end 150 has an inner diameter larger than that of the tapered rear section 170, for facilitating the implantation of the catheter kit. The reducing section 160 or the connection between the reducing section 160 and the reducing rear section 170 is provided with an inwardly protruding positioning protrusion, which is used for abutting against the distal outer side wall of the inner tube 200, and the positioning protrusion may be continuous or discontinuous. Through the simple joint matching design of the inner tube 100 and the outer tube 100 and the unique positioning protrusion positioning design of the distal end of the outer tube 100, when the inner tube 200 is slid or rotated, the inner tube 200 and the outer tube 100 are enabled to generate axial or radial relative displacement, the purpose of accurate butt joint or return of the distal end of the inner tube 200 and the distal end of the outer tube 100 is achieved, and the operation is simple and convenient.
In one embodiment, as shown in fig. 4, the positioning protrusion is a continuous annular structure 181 disposed along a circumferential direction, the annular positioning protrusion is disposed coaxially with the outer tube 100, an inner diameter of the positioning protrusion is smaller than an outer diameter of a distal end of the inner tube 200, and the inner tube 200 can be inserted into and abutted against the inner side of the positioning protrusion to form a seal.
In another embodiment, as shown in fig. 15 to 17, the positioning protrusion includes at least two first protrusion units 182 disposed at intervals along the circumferential direction, a groove structure 183 is formed between two adjacent first protrusion units 182, a second protrusion unit 250 for being inserted into the groove structure 183 is disposed on the outer sidewall of the distal end of the inner tube 200, and moving the inner tube 200 in the axial direction can make the second protrusion unit 250 enter the groove structure 183, and at this time, the outer diameter of the inner tube 200 is identical to the inner diameter of the variable diameter rear section 170. When the working state of the inner tube 200 needs to be switched, the inner tube 200 can be moved proximally, then the inner tube 200 is rotated for a certain angle, and then the inner tube 200 is moved distally, so that the second protruding unit 250 is inserted into the other groove structure 183, and the groove structure 183 prevents the inner tube 200 from rotating, thereby locking the current state of the inner tube 200.
In yet another embodiment, as shown in fig. 18, the inner tube 200 is rotatable relative to the outer tube 100, and the positioning boss includes a spiral boss 184 extending spirally in the axial direction, and the distance from the top of the spiral boss 184 to the axis of the outer tube 100 decreases gradually from the proximal end toward the distal end. The spiral protrusion 184 may be connected by a plurality of spiral convex segments sequentially connected end to end, specifically, three spiral convex segments L1, L2 and L3 sequentially arranged along the axial direction from the proximal end toward the distal end. The inner diameters of the spiral convex section L1, the spiral convex section L2 and the spiral convex section L3 are gradually reduced. The distal end of the inner tube 200 first enters the helical land L1 and the inner tube 200 is in the first state. When the distal end of the inner tube 200 is threaded into the helical land L2, the inner tube 200 is in the second state. When the distal end of the inner tube 200 is threaded into the helical land L3, the inner tube 200 is in the third state.
In order to improve the safety during rapid pumping, the first stopping portion 110 and the second stopping portion 210 are respectively provided with an interlocking structure, and the interlocking structure is used for locking the first stopping portion 110 and the second stopping portion 210 in the axial direction, so that deformation of the first stopping portion 110 and the second stopping portion 210 caused by overlarge pressure is reduced. The high efficiency and the safety of the liquid medicine injection during the mechanical pumping can be improved, the operation time is shortened, the operation cost is reduced, and the operation is faster and more convenient.
In one embodiment, the interlock structure includes a first magnet disposed on the first stop 110 and a second magnet disposed on the second stop 210. When the first stop portion 110 and the second stop portion 210 are attached together, the first magnet and the second magnet are attracted together, and the strength of each of the first stop portion 110 and the second stop portion 210 can be increased after the first stop portion 110 and the second stop portion 210 are connected.
In another embodiment, as shown in fig. 22, the inner tube 200 is rotatable relative to the outer tube 100, and the interlocking structure includes a first latch 310 provided on the first stopper 110, and a second latch 320 provided on the second stopper 210, the first latch 310 and the second latch 320 being latched by rotation. The first lock catch 310 and the second lock catch 320 may be groove-shaped, and the inner tube 200 is rotated, so that the second lock catch 320 and the first lock catch 310 may be buckled together, thereby preventing the first stop portion 110 and the second stop portion 210 from moving along the axial direction, and the stop stability is higher.
In yet another embodiment, as shown in fig. 23-25, the inner tube 200 is axially movable relative to the outer tube 100, and the interlocking structure includes a first axially disposed relief 410 disposed on the first stop 110 and a second axially disposed relief 420 disposed on the second stop 210. Specifically, the first concave-convex structure 410 may be a protrusion disposed on the first stop portion 110, the second concave-convex structure 420 may be an insertion hole disposed on the second stop portion 210, and when the inner tube 200 is inserted distally along the axial direction, the first concave-convex structure 410 on the inner tube 200 may be inserted into the second concave-convex structure 420 on the outer tube 100, so as to realize connection between the first stop portion 110 and the second stop portion 210, and after the first stop portion 110 and the second stop portion 210 are connected, the respective strength may be increased.
The first and second liquid outlets 130 and 260 may be identical or different in shape and arrangement.
In one embodiment, as shown in fig. 19, the first liquid outlet 130 includes a plurality of through holes, and the through holes may be round holes or strip slits. The shape and arrangement of the first liquid outlet 130 and the second liquid outlet 260 may be the same, and the plurality of through holes are arranged on the wall of the outer tube 100 along a spiral line, so as to fulfill the aim of spraying clinical liquid in the spiral line direction when the first liquid outlet 130 and the second liquid outlet 260 are aligned.
In another embodiment, the number of through holes in the wall of the outer tube 100 is at least two, for example four, at the same axial position. And a plurality of through holes at the same axial position form liquid outlet groups, and the number of the liquid outlet groups is at least two along the axial direction. The first and second liquid outlets 130 and 260 may be identical in shape and arrangement. Specifically, the positions of the through holes in the two adjacent liquid outlet groups in the axial direction are axially aligned, so that the aim of spraying the clinical liquid in the circumferential direction by 90 degrees is fulfilled, as shown in fig. 20. The positions of the through holes in the two adjacent liquid outlet groups in the axial direction can be arranged in a staggered manner in the axial direction, so that the aim of 360-degree circumferential spraying of clinical liquid is fulfilled, as shown in fig. 21.
In yet another embodiment, the first outlet 130 includes a first porous structure disposed on a wall of the outer tube 100, and the second outlet 260 includes a second porous structure. The number of through holes forming the first porous structure is larger than that of the through holes forming the second liquid outlet, and the arrangement form of the through holes forming the first porous structure covers the arrangement form of the through holes forming the second liquid outlet. Wherein, the meaning of covering means: the pattern that the through holes forming the first porous structure can be formed by selectively selecting and combining includes the pattern of the second liquid outlet, for example, some through holes in the first porous structure are closed, the remaining through holes can form the circumferential direction 90-degree spray after being conducted, and the arrangement mode of the through holes of the second liquid outlet is just the arrangement mode of the remaining through holes. When the through holes forming the second porous structure are aligned with the through holes forming the first porous structure, the outer tube 100 is discharged in the arrangement of the second porous structure, for example, the above-mentioned circumferential direction 90-degree spray. By pulling the inner tube 200 proximally, when the inner tube 200 is offset from the first liquid outlet 130 and the second opening 220 is in an open state, the liquid in the inner tube 200 is completely discharged from the distal end into the outer tube 100, and the outer tube 100 is discharged in the arrangement of the first porous structure.
In still another embodiment, the first liquid outlet 130 includes at least two first porous structures disposed on the wall of the outer tube 100, where the arrangement of the through holes forming the first porous structures is different in each first porous structure, so that after the different first porous structures are conducted, the liquid outlet is different in form, and may include directions such as a spiral direction liquid outlet, a circumferential direction liquid outlet of 90 degrees, a circumferential 360 degrees liquid outlet, and a single-side liquid outlet. The second liquid outlet comprises a second porous structure, the arrangement forms of the through holes forming the second liquid outlet can cover the arrangement forms of the through holes in all the first porous structures, so that the second porous structures can be aligned with any one of the first porous structures respectively, and the second porous structures are not overlapped with other first porous structures when the second porous structures are aligned with one of the first porous structures, and can be aligned with the next first porous structure only after completely crossing the current first porous structure during switching, so that continuous change of a liquid outlet state can be realized.
An indication mark is provided on the inner tube 200 and/or the outer tube 100 for indicating the current state of the inner tube 200. For example, marks A, B and C, A, B and C representing "first state", "second state" and "third state", respectively, are provided on the outer tube 100, are arranged in the circumferential direction, and arrows are provided on the inner tube 200, and the state of the inner tube 200 is determined at present by looking at the arrow pointing.
The outer surface of the inner tube 200 and the inner surface of the outer tube 100 are coated with a lubricating material, such as a hydrophilic coating, a silicone oil, etc., which are known in the art to satisfy biocompatibility and have lubricating properties, to increase sliding properties therebetween.
The first stopper 110 and the second stopper 210 are generally made of medical polymer materials commonly used in the art, such as silicone, TPU, pebax, nylon, or composite materials, and can be opened when the pressure exceeds a certain threshold value by adjusting the hardness or thickness of the materials.
The coreless design of the catheter kit eliminates the risk of foreign body embolism caused by withdrawal of the guidewire in prior art procedures.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A catheter kit, comprising:
the outer tube (100), the inside of the distal end of the outer tube (100) is provided with a first stop part (110), and the first stop part (110) and the inner side wall of the outer tube (100) in the circumferential direction of the first stop part enclose a first opening (120); a first liquid outlet (130) is formed in the pipe wall of the outer pipe (100);
the inner tube (200), the inside of the distal end of the inner tube (200) is provided with a second stop part (210), and the second stop part (210) and the inner wall of the inner tube (200) in the circumferential direction thereof enclose a second opening (220); a second liquid outlet (260) is formed in the pipe wall of the inner pipe (200); the inner pipe (200) is provided with a liquid inlet (230);
the inner tube (200) is positioned inside the outer tube (100), and the inner tube and the outer tube are coaxially arranged;
-the inner tube (200) is movable relative to the outer tube (100) to a first state, a second state and a third state;
in the first state, the first stop (110) is completely offset from the second opening (220), and the second stop (210) is completely offset from the first opening (120);
in the second state, the first stopper (110) blocks a portion of the second opening (220), and the second stopper (210) blocks a portion of the first opening (120);
in the third state, the first stopper (110) blocks the second opening (220), and the second stopper (210) blocks the first opening (120);
and in the second state and the third state, the first liquid outlet (130) and the second liquid outlet (260) are communicated.
2. Catheter kit according to claim 1, wherein the first stop (110) comprises at least two first stops (111) arranged circumferentially and/or the second stop (210) comprises at least two second stops arranged circumferentially spaced apart.
3. The catheter kit of claim 1, wherein the inner tube (200) is axially movable relative to the outer tube (100);
the inner side wall of the outer tube (100) is provided with a positioning protrusion protruding inwards, and the positioning protrusion is used for being abutted with the outer side wall of the distal end of the inner tube (200).
4. A catheter kit according to claim 3, wherein the positioning projections are annular, the annular positioning projections being arranged coaxially with the outer tube (100);
or, the positioning bulge comprises at least two first bulge units (182) which are arranged at intervals along the circumferential direction, a groove structure (183) is formed between every two adjacent first bulge units (182), and a second bulge unit (250) which is used for being correspondingly inserted with the groove structure (183) is arranged on the outer side wall of the far end of the inner tube (200);
alternatively, the inner tube (200) is rotatable relative to the outer tube (100), the positioning projection comprises a spiral projection (184) extending helically in an axial direction, and a distance of a top of the spiral projection (184) from an axis of the outer tube (100) gradually decreases from a proximal end toward a distal end direction.
5. Catheter kit according to claim 1, characterized in that the first stop (110) and the second stop (210) are provided with interlocking structures, respectively, for locking the first stop (110) and the second stop (210) in the axial direction.
6. The catheter kit of claim 5, wherein the interlock structure comprises a first magnet disposed on the first stop (110) and a second magnet disposed on the second stop (210);
alternatively, the inner tube (200) is rotatable relative to the outer tube (100), the interlocking structure comprising a first catch (310) provided on the first stop (110) and a second catch (320) provided on the second stop (210), the first catch (310) and second catch (320) effecting a locking by rotation;
alternatively, the inner tube (200) is axially movable relative to the outer tube (100), the interlocking structure comprises a first concave-convex structure (410) arranged on the first stop part (110) and axially arranged, and a second concave-convex structure (420) arranged on the second stop part (210) and axially arranged, and the first concave-convex structure (410) and the second concave-convex structure (420) are axially spliced.
7. The catheter kit of any of claims 1-6, wherein the first outlet (130) comprises a plurality of through holes, a plurality of said through holes being arranged in a spiral on the wall of the outer tube (100);
alternatively, at the same axial position, the number of through holes on the wall of the outer tube (100) is at least two; the through holes at the same axial position form liquid outlet groups, and the number of the liquid outlet groups is at least two along the axial direction;
alternatively, the first liquid outlet (130) comprises a first porous structure arranged on the wall of the outer tube (100), and the second liquid outlet (260) comprises a second porous structure; the number of the through holes forming the first porous structure is larger than that of the through holes forming the second liquid outlet, and the arrangement form of the through holes forming the first porous structure covers the arrangement form of the through holes forming the second liquid outlet; when the through holes forming the second porous structure are aligned with the through holes forming the first porous structure, the outer tube (100) discharges liquid in the arrangement form of the second porous structure; when the inner tube (200) is misplaced with the first liquid outlet (130) and the second opening (220) is in an open state, the outer tube (100) discharges liquid in the arrangement form of the first porous structure;
or, the first liquid outlet (130) comprises at least two first porous structures arranged on the pipe wall of the outer pipe (100), and the arrangement forms of the through holes forming the first porous structures in each first porous structure are different; the second liquid outlet comprises a second porous structure, and the arrangement forms of the through holes forming the second liquid outlet can cover the arrangement forms of the through holes in all the first porous structures, so that the second porous structures can be aligned with any one of the first porous structures respectively.
8. A catheter kit according to any of claims 1-3, wherein the outer tube (100) is threadedly connected with the inner tube (200);
or, a limit chute (270) extending along the axial direction of the inner pipe (200) is arranged on the outer wall of the inner pipe (200), and a sliding block (190) which is in sliding connection with the limit chute (270) is arranged on the inner wall of the outer pipe (100); in the axial direction, the projection of the first stop (110) towards the distal end face of the inner tube (200) completely covers the second opening (220), and the projection of the second stop (210) towards the distal end face of the outer tube (100) completely covers the first opening (120), so that the inner tube (200) is switched between a first state, a second state and a third state in a sliding manner.
9. Catheter kit according to any of claims 1-6, characterized in that the inner tube (200) and/or the outer tube (100) are provided with an indication mark for indicating the current state of the inner tube (200).
10. The catheter kit of any of claims 1-6, wherein a lubricating material is coated between the outer surface of the inner tube (200) and the inner surface of the outer tube (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311754206.9A CN117426834A (en) | 2023-12-20 | 2023-12-20 | Catheter set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311754206.9A CN117426834A (en) | 2023-12-20 | 2023-12-20 | Catheter set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117426834A true CN117426834A (en) | 2024-01-23 |
Family
ID=89552019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311754206.9A Pending CN117426834A (en) | 2023-12-20 | 2023-12-20 | Catheter set |
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| Country | Link |
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| CN (1) | CN117426834A (en) |
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| CN216785019U (en) * | 2022-03-02 | 2022-06-21 | 杭州博欣科技有限公司 | Medical test tube slowly falls device |
| CN115252145A (en) * | 2022-07-08 | 2022-11-01 | 上海神玑医疗科技有限公司 | Emergency clutch device and blood vessel intervention equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204445580U (en) * | 2015-02-13 | 2015-07-08 | 谢启林 | Lotus root sheet type discharge adjustable device |
| CN105012005A (en) * | 2015-07-20 | 2015-11-04 | 广州爱锘德医疗器械有限公司 | Bone cement injecting device and bone cement injecting method |
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