CN105854122B - Anti-thrombus indwelling needle - Google Patents
Anti-thrombus indwelling needle Download PDFInfo
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- CN105854122B CN105854122B CN201610405548.3A CN201610405548A CN105854122B CN 105854122 B CN105854122 B CN 105854122B CN 201610405548 A CN201610405548 A CN 201610405548A CN 105854122 B CN105854122 B CN 105854122B
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- Prior art keywords
- catheter
- tube
- elastic tube
- elastic
- liquid stopping
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- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1587—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body suitable for being connected to an infusion line after insertion into a patient
Abstract
The invention provides an anti-thrombus retention needle, which comprises: a catheter hub; the input catheter is at least partially an elastic tube and is arranged at one end of the catheter seat; the output conduit is arranged at the other end of the conduit seat; the liquid stopping clamp is rotatably sleeved on the elastic pipe; the axial limiting structure is arranged on the input catheter and/or the catheter seat corresponding to the liquid stopping clip, limits the liquid stopping clip at one end of the elastic tube close to the catheter seat, and enables the liquid stopping clip to have a small movement amount in the axial direction of the elastic tube so as to ensure that the bending or shaking of the elastic tube between the liquid stopping clip and the catheter seat is avoided and the required flexibility is kept between the liquid stopping clip and the catheter seat. The invention can effectively prevent the change of the volume in the lumen of the elastic tube, which is easy to form thrombus, from bringing pain to the patient and even causing life hazard, and simultaneously can avoid scratching or clamping the epidermis of the patient in the clinical use process.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a thrombus-preventing indwelling needle.
Background
In the medical field, an indwelling needle for clinical patients generally includes a catheter, a catheter holder, an elastic extension tube, a liquid-stopping clip, and the like, wherein the catheter is mounted at one end of the catheter holder, the elastic extension tube is fixedly connected to the catheter holder and communicated with the catheter, and the liquid-stopping clip is disposed on the elastic extension tube. In clinical application, the liquid medicine is infused into a clinical patient from a dropping bottle through an elastic extension tube and a connected catheter, and the liquid stopping clamp has the function of controlling stopping infusion and also can prevent the clinical patient from suffering and even causing life harm due to thrombus formed by blood backflow.
In the common indwelling needle which is commonly used at present, the liquid stopping clamp can freely move back and forth on the elastic extension tube. After the transfusion is finished, a certain distance exists between the liquid stopping clamp and the catheter seat, the elastic extension tube between the distance can be bent or shaken inevitably when medical workers operate or clinical patients move, after the liquid stopping clamp is closed, if the elastic extension tube between the liquid stopping clamp and the catheter seat is bent or shaken, the volume in the tube cavity of the elastic extension tube can be changed, so that liquid medicine in the tube cavity of the elastic extension tube can be extruded or human blood can be sucked into the tube cavity of the elastic extension tube, once the blood is sucked into the tube cavity of the elastic extension tube, thrombus can be formed easily, the thrombus can block the tube cavity of the catheter, the transfusion to the clinical patients is not facilitated, meanwhile, the thrombus can block blood vessels of the clinical patients, and pain and even life hazard are brought to the clinical patients.
In order to solve the above problems, the prior art, for example, chinese patent document CN204766831U, discloses a disposable thrombus-preventing indwelling needle, which directly connects a liquid-stopping clip to a catheter seat or otherwise makes the liquid-stopping clip only rotate around an elastic extension tube and not reciprocate along the elastic extension tube, although the liquid-stopping clip of the thrombus-preventing indwelling needle can prevent the elastic extension tube from bending or shaking due to a long distance between the liquid-stopping clip and the catheter seat by limiting the liquid-stopping clip from reciprocating on the elastic extension tube, so that the change of the volume in a lumen is likely to form thrombus, which brings pain to a patient and even causes life harm; however, in clinical use, after the puncture of the indwelling needle is completed (the catheter is already inserted into the blood vessel of the patient), the application patch is required, and the liquid stopping clip is made of a hard material and is easily scratched or clipped on the epidermis of the patient when used, so that part of the patients need to apply the application patch between the liquid stopping clip and the skin in order to prevent the liquid stopping clip from directly contacting with the skin. If the liquid stopping clip is completely fixed with the catheter base, the liquid stopping clip, the catheter base and the catheter need to be lifted together to place the application into the skin below the liquid stopping clip when the application is pasted between the liquid stopping clip and the skin of a patient, and in the lifting process, the puncture wound of the patient can be subjected to external force generated by shaking of the catheter, so that the wound of the patient feels pain.
Disclosure of Invention
Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a thrombus-preventing indwelling needle which is less likely to cause thrombus formation and pain in a patient by overcoming the drawbacks of the indwelling needle of the prior art that thrombus is easily formed or pain is easily caused in a wound of a patient when the indwelling needle is applied.
The invention provides a thrombus-prevention indwelling needle, which comprises:
a catheter hub;
the input catheter is at least partially an elastic tube and is arranged at one end of the catheter seat;
the output conduit is arranged at the other end of the conduit seat;
the liquid stopping clamp is rotatably sleeved on the elastic pipe;
the axial limiting structure is arranged on the input catheter and/or the catheter seat corresponding to the liquid stopping clip, limits the liquid stopping clip at one end of the elastic tube close to the catheter seat, and enables the liquid stopping clip to have a small movement amount in the axial direction of the elastic tube, so that the change of the volume of the inner cavity of the elastic tube caused by the bending or shaking of the elastic tube between the liquid stopping clip and the catheter seat is avoided, and the required flexibility can be kept between the liquid stopping clip and the catheter seat.
The axial limiting structure comprises a first resisting part and a second resisting part, wherein the first resisting part is arranged on the catheter seat or on the input catheter close to one side of the catheter seat, and the second resisting part and the first resisting part are arranged in the axial direction of the elastic tube at a distance of an axial moving space;
the liquid stopping clamp is provided with a first matching part which is arranged close to one side of the catheter seat and corresponds to the first resisting part, and a second matching part which is arranged opposite to the first matching part and far away from one side of the catheter seat and corresponds to the second resisting part, and the first matching part and the second matching part are positioned in the axial moving space;
a first gap is reserved between the first matching part and the first resisting part, a second gap is reserved between the second matching part and the second resisting part, and the sum of the first gap and the second gap forms the micro-movement amount; one of the first gap and the second gap may have a size of 0.
The elastic tube is connected with the catheter hub.
The first resisting part is a first fixed sleeve arranged on the elastic pipe;
the second resisting part is a second fixing sleeve arranged on the elastic tube.
The outer diameter of the connecting part of the catheter seat and the elastic tube is larger than that of the elastic tube, and the first resisting part is the end face of the connecting part of the catheter seat and the elastic tube;
the second resisting part is a second fixing sleeve arranged on the elastic tube.
The input catheter also comprises a reinforced tube which is communicated with the elastic tube and does not change or changes little and negligibly in the volume of the inner cavity when the input catheter bends or shakes, one end of the reinforced tube is connected with the catheter seat, and the other end of the reinforced tube is connected with the elastic tube.
The outer diameter of the reinforcing pipe is larger than that of the elastic pipe, and the first resisting part is an end face of the joint of the reinforcing pipe and the elastic pipe;
the second resisting part is a second fixing sleeve arranged on the elastic tube.
The first resisting part is a first fixed sleeve arranged on the reinforcing pipe;
the second resisting part is a second fixing sleeve arranged on the elastic pipe or the reinforcing pipe.
The outer diameter of the connecting part of the catheter seat and the reinforcing pipe is larger than that of the reinforcing pipe, and the first resisting part is an end face of the connecting part of the catheter seat and the reinforcing pipe;
the second resisting part is a second fixing sleeve arranged on the elastic pipe or the reinforcing pipe.
The reinforced pipe is a braided pipe, or a spring reinforced pipe with a metal spring arranged inside or outside the pipe or in the pipe wall, or a metal pipe, or a non-metal pipe such as a plastic pipe with hardness greater than 50 Shore HA, a rubber pipe and the like.
The micro activity is 0-10 mm.
The micro activity is 0-8 mm.
The micro activity is 0-6 mm.
The technical scheme of the invention has the following advantages:
1. the invention provides an anti-thrombus retention needle, which comprises: a catheter hub; the input catheter is at least partially an elastic tube and is arranged at one end of the catheter seat; the output conduit is arranged at the other end of the conduit seat; the liquid stopping clamp is rotatably sleeved on the elastic pipe; the axial limiting structure is arranged on the input catheter and/or the catheter seat corresponding to the liquid stopping clip, limits the liquid stopping clip at one end of the elastic tube close to the catheter seat, and enables the liquid stopping clip to have a small movement amount in the axial direction of the elastic tube, so that the change of the volume of the inner cavity of the elastic tube caused by the bending or shaking of the elastic tube between the liquid stopping clip and the catheter seat is avoided, and the required flexibility can be kept between the liquid stopping clip and the catheter seat. In the anti-thrombus indwelling needle, the axial limiting structure limits the liquid stopping clip at one end of the elastic tube close to the catheter seat and enables the elastic tube to have small activity in the axial direction, thereby effectively avoiding the bending or shaking of the elastic tube caused by the long distance between the liquid stopping clip and the catheter seat, preventing the pain and even the life hazard of a patient caused by the thrombus caused by the change of the volume in the lumen of the elastic tube, simultaneously, in the clinical use process, when the indwelling needle is pasted after puncture is finished, the distance between the liquid stopping clip and the catheter seat can be finely adjusted, enabling the liquid stopping clip to be relatively far away from the catheter seat in the small activity range, slightly bending the input catheter between the liquid stopping clip and the catheter seat (the volume change of the inner cavity of the input catheter caused by the bending is slightly negligible or fails to cause the volume change of the inner cavity of the input catheter) to lift the liquid stopping clip, and pasting the liquid stopping clip on the skin of the patient under the liquid stopping clip, due to the flexibility between the liquid stopping clamp and the catheter seat, the catheter which is punctured into the blood vessel does not need to be shaken when the liquid stopping clamp is lifted, and the pain of the puncture wound of the patient caused by shaking of external force is avoided.
2. The axial limiting structure comprises a first resisting part and a second resisting part, wherein the first resisting part is arranged on the catheter seat or on the input catheter close to one side of the catheter seat, and the second resisting part and the first resisting part are arranged in the axial direction of the elastic tube at an interval of an axial moving space; the liquid stopping clamp is provided with a first matching part which is arranged close to one side of the catheter seat and corresponds to the first resisting part, and a second matching part which is arranged opposite to the first matching part and far away from one side of the catheter seat and corresponds to the second resisting part, and the first matching part and the second matching part are positioned in the axial moving space; a first gap is reserved between the first matching part and the first resisting part, a second gap is reserved between the second matching part and the second resisting part, and the sum of the first gap and the second gap forms the micro-movement amount; one of the first gap and the second gap may have a size of 0. In the thrombus-prevention indwelling needle, the first resisting part and the second resisting part can be flexibly arranged on the catheter seat or the elastic tube according to actual conditions, can be fixedly arranged, and can also be movably arranged with larger friction force and capable of realizing relative movement only by larger external force; meanwhile, the first matching part and the second matching part can be flexibly arranged at a plurality of positions of the liquid stopping clamp according to actual conditions. The anti-thrombus remaining needle has strong applicability.
3. The anti-thrombus indwelling needle provided by the invention is characterized in that the input catheter further comprises a reinforcing tube which is communicated with the elastic tube and does not change or changes a little in volume in the lumen when the input catheter bends or shakes, one end of the reinforcing tube is connected with the catheter seat, and the other end of the reinforcing tube is connected with the elastic tube. When the connection between the catheter seat and the elastic tube is bent or shaken, the volume in the lumen does not change or changes a tiny and negligible reinforcing tube, when the liquid stopping jacket is arranged on the elastic tube to ensure the liquid stopping effect, the reinforcing tube can avoid that the input catheter close to the catheter seat is easy to change the volume in the lumen due to bending or shaking, so that thrombus is easy to form to bring pain and even life harm to a patient, and meanwhile, a certain distance can be kept between the liquid stopping jacket and the catheter seat, so that medical personnel can conveniently keep the operation of preventing thrombus.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a front view of an anti-thrombus indwelling needle provided in a first embodiment of the present invention;
FIG. 2 is a front view of a modified embodiment of the anti-thrombotic indwelling needle shown in FIG. 1;
FIG. 3 is a front view of a modified embodiment of the anti-thrombotic indwelling needle shown in FIG. 1;
FIG. 4 is a front view of a modified embodiment of the anti-thrombotic indwelling needle shown in FIG. 1;
FIG. 5 is a front view of a modified embodiment of the anti-thrombotic indwelling needle shown in FIG. 1;
FIG. 6 is a front view of the anti-thrombus indwelling needle with the reinforcing tube provided in the first embodiment of the present invention;
FIG. 7 is a front view of a modified embodiment of the anti-thrombotic indwelling needle shown in FIG. 6;
FIG. 8 is a front view of a modified embodiment of the anti-thrombotic indwelling needle shown in FIG. 6;
FIG. 9 is a front view of a modified embodiment of the anti-thrombotic indwelling needle shown in FIG. 6;
FIG. 10 is a front view of a modified embodiment of the anti-thrombotic indwelling needle shown in FIG. 6;
description of reference numerals:
1-a catheter seat, 2-an elastic tube, 3-an output catheter, 4-a liquid stopping clamp, 41-a first matching part, 42-a second matching part, 5-a first fixing sleeve, 6-a second fixing sleeve and 7-a reinforcing tube.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the thrombus-prevention indwelling needle of the present embodiment includes:
a catheter hub 1;
the input catheter, at least part of which is an elastic tube 2, is arranged at one end of the catheter seat 1;
an output catheter 3 mounted on the other end of the catheter hub 1;
the liquid stopping clamp 4 is rotatably sleeved on the elastic tube 2;
and the axial limiting structure is arranged on the input catheter and/or the catheter seat 1 corresponding to the liquid stopping clip 4, limits the liquid stopping clip 4 at one end of the elastic tube 2 close to the catheter seat 1, and enables the liquid stopping clip 4 to have a small movement amount in the axial direction of the elastic tube 2, so that the change of the volume of the inner cavity of the elastic tube 2 caused by the bending or shaking of the elastic tube 2 between the liquid stopping clip 4 and the catheter seat 1 is avoided, and the required flexibility can be kept between the liquid stopping clip 4 and the catheter seat 1.
In the thrombus-preventing indwelling needle, the axial limiting structure limits the liquid stopping clip 4 at one end of the elastic tube 2 close to the catheter seat 1 and enables the elastic tube 2 to have small movement amount in the axial direction, so that the large bending or shaking of the elastic tube 2 caused by the long distance between the liquid stopping clip 4 and the catheter seat 1 can be effectively avoided, the phenomenon that thrombus is easily formed due to the change of the volume in the tube cavity of the elastic tube 2 and causes pain to a patient or even life hazard is prevented, meanwhile, the required flexibility is ensured to be kept between the liquid stopping clip 4 and the catheter seat 1, in the clinical use process, when the indwelling needle is attached after puncture is completed, the distance between the liquid stopping clip 4 and the catheter seat 1 can be finely adjusted, the input catheter between the liquid stopping clip 4 and the catheter seat 1 is slightly bent (the volume change of the inner cavity of the input catheter caused by the bending is slightly ignored or the volume change of the inner cavity of the input catheter cannot be caused) to lift the liquid stopping clip 4, the application paste is pasted on the skin of a patient below the liquid stopping clamp 4, and the output catheter 3 which is punctured into a blood vessel does not need to be shaken when the liquid stopping clamp 4 is lifted due to the flexibility between the liquid stopping clamp 4 and the catheter base 1, so that the pain of the puncture wound of the patient caused by shaking of external force is avoided.
The specific form of the small movement amount may be various, and in this embodiment, the axial limiting structure includes a first abutting portion disposed on the catheter hub 1 or on the input catheter near one side of the catheter hub 1, and a second abutting portion disposed at an axial movement space axially spaced from the first abutting portion in the elastic tube 2;
the liquid stopping clip 4 is provided with a first matching part 41 which is arranged close to one side of the catheter base 1 and corresponds to the first resisting part, and a second matching part 42 which is arranged opposite to one side of the first matching part 41 far away from the catheter base 1 and corresponds to the second resisting part, wherein the first matching part 41 and the second matching part 42 are positioned in the axial moving space;
a first gap is reserved between the first matching part 41 and the first abutting part, a second gap is reserved between the second matching part 42 and the second abutting part, and the sum of the first gap and the second gap forms the micro-movement amount; one of the first gap and the second gap may have a size of 0.
In the anti-thrombus indwelling needle, the first resisting part and the second resisting part can be flexibly arranged on the catheter base 1 or the elastic tube 2 according to actual conditions, can be fixedly arranged, and can also be movably arranged with larger friction force and capable of realizing relative movement only by larger external force; meanwhile, the first and second engagement portions 41 and 42 can be flexibly disposed at a plurality of positions of the liquid stop clip 4 according to actual conditions. The antithrombotic indwelling needle of the present embodiment has strong applicability. When the first resisting part and the second resisting part are movably arranged on the catheter seat 1 or the elastic tube 2, the size of the micro-movement of the liquid stopping clip 4 in the axial direction of the elastic tube 2 can be adjusted according to requirements by adjusting the movement of the first resisting part and/or the second resisting part on the catheter seat 1 or the elastic tube 2, and meanwhile, the installation position of the first resisting part and/or the second resisting part on the catheter seat 1 or the elastic tube 2 can be flexibly adjusted.
As a specific embodiment, the elastic tube 2 is connected to the catheter hub 1.
The specific arrangement manner of the first resisting portion and the second resisting portion may be various, and as a specific implementation manner, in this embodiment, as shown in fig. 1, the first resisting portion is a first fixing sleeve 5 arranged on the elastic tube 2; the second resisting part is a second fixing sleeve 6 arranged on the elastic tube 2. The liquid stopping clamp 4 is integrally positioned between the first fixing sleeve 5 and the second fixing sleeve 6, the first matching part 41 is the end surface of the liquid stopping clamp 4 close to the catheter base 1, and the second matching part 42 is the end surface of the liquid stopping clamp 4 far away from the catheter base 1. Alternatively, the liquid-stopping clamp 4 may be partially located between the first fixing sleeve 5 and the second fixing sleeve 6, the first matching portion 41 is a surface of the partially located structure close to the catheter hub 1, and the second matching portion 42 is a surface of the partially located structure far from the catheter hub 1. For example, the partial structure may be an end portion close to the catheter hub 1 as shown in fig. 2, an end portion far from the catheter hub 1 as shown in fig. 3, or some partial structure in the middle.
As a modified embodiment, as shown in fig. 4, the outer diameter of the catheter hub 1 at the connection with the elastic tube 2 is larger than the outer diameter of the elastic tube 2, and the first abutting portion is an end surface of the catheter hub 1 at the connection with the elastic tube 2; the second resisting part is a second fixing sleeve 6 arranged on the elastic tube 2. The liquid stopping clamp 4 is integrally positioned between the end face of the joint of the catheter base 1 and the elastic tube 2 and the second fixing sleeve 6, the first matching part 41 is the end face of the liquid stopping clamp 4 close to the catheter base 1, and the second matching part 42 is the end face of the liquid stopping clamp 4 far away from the catheter base 1. Alternatively, a part of the structure of the liquid stopping clip 4 is located between the end surface of the connection between the catheter hub 1 and the elastic tube 2 and the second fixing sleeve 6, the first matching portion 41 is the surface of the part of the structure close to the catheter hub 1, and the second matching portion 42 is the surface of the part of the structure far from the catheter hub 1. For example, the partial structure may be an end portion near the catheter hub 1 as shown in fig. 5.
As a modified embodiment, as shown in fig. 6, the input catheter further includes a reinforcing tube 7 which communicates with the elastic tube 2 and does not change or changes a little in the volume in the lumen when bent or shaken, and one end of the reinforcing tube 7 is connected to the catheter hub 1 and the other end is connected to the elastic tube 2.
When the connection between the catheter seat 1 and the elastic tube 2 is bent or shaken, the volume in the lumen does not change or changes a little and negligibly reinforced tube 7, the liquid stopping clamp 4 is sleeved on the elastic tube to ensure the liquid stopping effect, and meanwhile, the reinforced tube 7 can prevent the input catheter close to the catheter seat 1 from easily changing the volume in the lumen due to bending or shaking, so that the thrombus is easily formed to bring pain to a patient and even life hazard, meanwhile, a certain distance can be kept between the liquid stopping clamp 4 and the catheter seat 1, and the operation of the medical personnel for preventing thrombus retention is facilitated.
After the reinforcing tube 7 is connected, there may be multiple specific arrangement manners of the first abutting portion and the second abutting portion, as a specific implementation manner, in this embodiment, as shown in fig. 6, an outer diameter of the reinforcing tube 7 at a connection portion with the elastic tube 2 is larger than an outer diameter of the elastic tube 2, and the first abutting portion is an end surface of the reinforcing tube 7 at the connection portion with the elastic tube 2; the second resisting part is a second fixing sleeve 6 arranged on the elastic tube 2. The liquid stopping clamp 4 is integrally positioned between the end face of the joint of the reinforcing pipe 7 and the elastic pipe 2 and the second fixing sleeve 6, the first matching part 41 is the end face of the liquid stopping clamp 4 close to the reinforcing pipe 7, and the second matching part 42 is the end face of the liquid stopping clamp 4 far away from the reinforcing pipe 7. Alternatively, a part of the structure of the liquid stopping clip 4 may be located between the end surface of the joint of the reinforcing tube 7 and the elastic tube 2 and the second fixing sleeve 6, the first matching portion 41 may be a surface of the part of the structure close to the reinforcing tube 7, and the second matching portion 42 may be a surface of the part of the structure far from the reinforcing tube 7. For example, the partial structure may be one end portion near the reinforcing tube 7 as shown in fig. 7.
As a modified embodiment, as shown in fig. 8, the first stopping portion is a first fixing sleeve 5 provided on the reinforcing pipe 7; the second resisting part is a second fixing sleeve 6 arranged on the elastic tube 2 or the reinforcing tube 7.
As another modified embodiment, as shown in fig. 9, the first stopping portion is a first fixing sleeve 5 disposed on the elastic tube 2; the second resisting part is a second fixing sleeve 6 arranged on the elastic tube 2.
In the two modified embodiments, the liquid-stopping clamp 4 is entirely located between the first fixing sleeve 5 and the second fixing sleeve 6, the first matching portion 41 is the end surface of the liquid-stopping clamp 4 close to the catheter base 1, and the second matching portion 42 is the end surface of the liquid-stopping clamp 4 far from the catheter base 1. Alternatively, the liquid-stopping clamp 4 may be partially located between the first fixing sleeve 5 and the second fixing sleeve 6, the first matching portion 41 is a surface of the partially located structure close to the catheter hub 1, and the second matching portion 42 is a surface of the partially located structure far from the catheter hub 1. For example, the partial structure may be one end portion near the catheter hub 1, one end portion far from the catheter hub 1, or some intermediate partial structure.
As a modified embodiment, as shown in fig. 10, the outer diameter of the catheter hub 1 at the junction with the reinforcing tube 7 is larger than the outer diameter of the reinforcing tube 7, and the first abutting portion is an end surface of the catheter hub 1 at the junction with the reinforcing tube 7; the second resisting part is a second fixing sleeve 6 arranged on the elastic tube 2 or the reinforcing tube 7. The liquid stopping clamp 4 is integrally positioned between the end face of the joint of the catheter base 1 and the reinforcing pipe 7 and the second fixing sleeve 6, the first matching part 41 is the end face of the liquid stopping clamp 4 close to the catheter base 1, and the second matching part 42 is the end face of the liquid stopping clamp 4 far away from the catheter base 1. Alternatively, a part of the structure of the liquid stopping clip 4 may be located between the end surface of the joint of the catheter hub 1 and the reinforcing tube 7 and the second fixing sleeve 6, the first matching portion 41 may be a surface of the part of the structure close to the catheter hub 1, and the second matching portion 42 may be a surface of the part of the structure far from the catheter hub 1. For example, the partial structure may be near one end of the catheter hub 1.
The specific form of the reinforced tube 7 may be various, for example, it may be a braided tube, a spring reinforced tube with a metal spring arranged inside or outside the tube or in the tube wall, or a metal tube, or a non-metal tube such as a plastic tube with hardness greater than 50 shore HA, a rubber tube, etc., as long as it can satisfy the condition that the volume in the lumen does not change or changes slightly and negligibly when bending or shaking. In this embodiment, the reinforcing tube 7 is a braided tube.
In a specific embodiment, the micro-activity may be 0 to 10mm, 0 to 8mm, or 0 to 6 mm. In this embodiment, the minute amount of activity is 0 to 6 mm.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. An anti-thrombus indwelling needle, comprising:
a catheter hub (1);
the input catheter is at least partially an elastic tube (2) and is arranged at one end of the catheter seat (1);
an output conduit (3) mounted at the other end of the conduit seat (1);
the liquid stopping clamp (4) is rotatably sleeved on the elastic tube (2);
the axial limiting structure is arranged on the input catheter and/or the catheter seat (1) and corresponds to the liquid stopping clip (4), the axial limiting structure limits the liquid stopping clip (4) at one end of the elastic tube (2) close to the catheter seat (1), and enables the liquid stopping clip (4) to have a small movement amount in the axial direction of the elastic tube (2), so that the change of the volume of the inner cavity of the elastic tube (2) caused by the bending or shaking of the elastic tube (2) between the liquid stopping clip (4) and the catheter seat (1) is avoided, and the required flexibility can be kept between the liquid stopping clip (4) and the catheter seat (1);
the axial limiting structure comprises a first abutting part and a second abutting part, wherein the first abutting part is arranged on the catheter seat (1) or on the input catheter close to one side of the catheter seat (1), and the second abutting part and the first abutting part are arranged in the axial direction of the elastic tube (2) at a distance of an axial moving space;
the liquid stopping clamp (4) is provided with a first matching part (41) which is arranged close to one side of the catheter seat (1) and corresponds to the first resisting part, and a second matching part (42) which is arranged far away from one side of the catheter seat (1) relative to the first matching part (41) and corresponds to the second resisting part, and the first matching part (41) and the second matching part (42) are positioned in the axial moving space;
a first gap is reserved between the first matching part (41) and the first resisting part, a second gap is reserved between the second matching part (42) and the second resisting part, and the sum of the first gap and the second gap forms the micro-movement amount; one of the first gap and the second gap can have a dimension of 0;
the elastic tube (2) is connected with the catheter seat (1);
the input catheter also comprises a reinforced tube (7) which is communicated with the elastic tube (2) and does not change or changes little and negligibly in the volume of the inner cavity when the input catheter bends or shakes, one end of the reinforced tube (7) is connected with the catheter seat (1), and the other end of the reinforced tube is connected with the elastic tube (2).
2. The anti-thrombotic indwelling needle according to claim 1,
the first resisting part is a first fixed sleeve (5) arranged on the elastic pipe (2);
the second resisting part is a second fixing sleeve (6) arranged on the elastic tube (2).
3. The anti-thrombotic indwelling needle according to claim 1,
the outer diameter of the connecting part of the catheter seat (1) and the elastic tube (2) is larger than that of the elastic tube (2), and the first resisting part is the end surface of the connecting part of the catheter seat (1) and the elastic tube (2);
the second resisting part is a second fixing sleeve (6) arranged on the elastic tube (2).
4. The anti-thrombotic indwelling needle according to claim 1,
the outer diameter of the joint of the reinforcing pipe (7) and the elastic pipe (2) is larger than that of the elastic pipe (2), and the first resisting part is the end face of the joint of the reinforcing pipe (7) and the elastic pipe (2);
the second resisting part is a second fixing sleeve (6) arranged on the elastic tube (2).
5. The anti-thrombotic indwelling needle according to claim 4,
the first resisting part is a first fixed sleeve (5) arranged on the reinforcing pipe (7);
the second resisting part is a second fixing sleeve (6) arranged on the elastic pipe (2) or the reinforcing pipe (7).
6. The anti-thrombotic indwelling needle according to claim 4,
the outer diameter of the connecting part of the catheter seat (1) and the reinforcing pipe (7) is larger than that of the reinforcing pipe (7), and the first resisting part is the end face of the connecting part of the catheter seat (1) and the reinforcing pipe (7);
the second resisting part is a second fixing sleeve (6) arranged on the elastic pipe (2) or the reinforcing pipe (7).
7. The anti-thrombotic indwelling needle according to any of claims 1 to 6, wherein the reinforcement tube (7) is a braided tube, or a spring reinforced tube with metal springs inside or outside the tube or in the tube wall, or a metal tube, or a plastic or rubber tube with a hardness greater than 50 Shore HA.
8. The anti-thrombus indwelling needle according to any one of claims 1 to 6, wherein the minute amount of activity is 0 to 10 mm.
9. The anti-thrombus indwelling needle according to any one of claims 1 to 6, wherein the minute amount of activity is 0 to 8 mm.
10. The anti-thrombus indwelling needle according to any one of claims 1 to 6, wherein the minute amount of activity is 0 to 6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610405548.3A CN105854122B (en) | 2016-06-08 | 2016-06-08 | Anti-thrombus indwelling needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610405548.3A CN105854122B (en) | 2016-06-08 | 2016-06-08 | Anti-thrombus indwelling needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105854122A CN105854122A (en) | 2016-08-17 |
| CN105854122B true CN105854122B (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610405548.3A Active CN105854122B (en) | 2016-06-08 | 2016-06-08 | Anti-thrombus indwelling needle |
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|---|---|---|---|---|
| EP1537889A2 (en) * | 1997-05-29 | 2005-06-08 | Venetec International, Inc. | Medical line anchoring system |
| CN203647794U (en) * | 2013-12-26 | 2014-06-18 | 尹建敏 | Safe indwelling needle for blood sampling and transfusing |
| CN204275171U (en) * | 2014-12-01 | 2015-04-22 | 邹卫平 | A kind of remaining needle with slow release malleation |
| CN204766831U (en) * | 2015-05-14 | 2015-11-18 | 广东龙心医疗器械有限公司 | Disposable prevents thrombus and keeps somewhere needle |
| CN205163806U (en) * | 2015-07-31 | 2016-04-20 | 河南曙光健士医疗器械集团股份有限公司 | Prevent thrombus and keep somewhere needle device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104922759B (en) * | 2015-06-24 | 2018-03-20 | 湛江健力源医疗用品有限公司 | A kind of remaining needle |
| CN104922762B (en) * | 2015-06-24 | 2018-05-01 | 湛江健力源医疗用品有限公司 | One kind has sleeved remaining needle |
| CN206026794U (en) * | 2016-06-08 | 2017-03-22 | 广东龙心医疗器械有限公司 | Prevent thrombus and keep somewhere needle |
-
2016
- 2016-06-08 CN CN201610405548.3A patent/CN105854122B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1537889A2 (en) * | 1997-05-29 | 2005-06-08 | Venetec International, Inc. | Medical line anchoring system |
| CN203647794U (en) * | 2013-12-26 | 2014-06-18 | 尹建敏 | Safe indwelling needle for blood sampling and transfusing |
| CN204275171U (en) * | 2014-12-01 | 2015-04-22 | 邹卫平 | A kind of remaining needle with slow release malleation |
| CN204766831U (en) * | 2015-05-14 | 2015-11-18 | 广东龙心医疗器械有限公司 | Disposable prevents thrombus and keeps somewhere needle |
| CN205163806U (en) * | 2015-07-31 | 2016-04-20 | 河南曙光健士医疗器械集团股份有限公司 | Prevent thrombus and keep somewhere needle device |
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| Publication number | Publication date |
|---|---|
| CN105854122A (en) | 2016-08-17 |
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