CN106267449B - Disposable anti-thrombus indwelling needle - Google Patents

Abstract

The invention discloses a disposable thrombus-preventing remaining needle, which consists of main components of a catheter, a catheter seat, an elastic extension tube and a liquid-stopping clamp or a two-way cock, wherein the catheter is arranged at one end of the catheter seat, and the elastic extension tube is fixedly connected through a side joint of the catheter seat and penetrates through the liquid-stopping clamp or the two-way cock. It adopts a specific technical measure to make the liquid-stopping clamp or two-way cock rotate around the elastic extension tube and can not move back and forth along the elastic extension tube. The flexible extension tube can effectively avoid the phenomenon that the flexible extension tube between the liquid stop clamp or the two-way cock and the catheter seat is bent or shaken to generate the volume change of the tube cavity of the flexible extension tube, thereby ensuring that the medical accident of thrombus does not occur in the whole infusion process, and being widely applied to various clinical infusions.

Description

Disposable anti-thrombus indwelling needle

Technical Field

The invention relates to an indwelling needle for clinical patients in the medical field, in particular to a disposable anti-thrombus indwelling needle.

Background

In the medical field, most of indwelling needles used for clinical patients are composed of a catheter, a catheter holder, an elastic extension tube, commonly called a flexible tube, and a liquid stopping clip or sheet, wherein the catheter is mounted on one end of the catheter holder, and the elastic extension tube is fixedly connected through a side connector of the catheter holder and penetrates through the liquid stopping clip or sheet. 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 or the liquid stopping sheet can not only control the stopping of infusion, but also avoid the pain and the life hazard brought to the clinical patient caused by the thrombus formed by the backflow of blood.

However, a general indwelling needle in which a liquid stopping clip or a liquid stopping sheet can be moved back and forth on an elastic extension tube is currently used. After the infusion is finished, because a certain distance exists between the liquid stopping clip and the catheter seat or between the liquid stopping sheet and the catheter seat, the elastic extension tube between the distance is inevitably bent or shaken when the medical staff operates or the clinical patient moves. When the liquid stopping clip or the liquid stopping sheet is closed, if the elastic extension tube between the liquid stopping clip or the liquid stopping sheet and the catheter seat is bent or shaken, the volume in the lumen of the elastic extension tube can be changed, so that the liquid medicine in the lumen of the elastic extension tube can be extruded or the blood of a human body can be sucked into the lumen of the elastic extension tube, once the blood is sucked into the lumen of the elastic extension tube, thrombus is easy to form, the thrombus can block the lumen of the catheter, the transfusion to a clinical patient is not facilitated again, meanwhile, the thrombus can block the blood vessel of the clinical patient, and the pain and the life hazard are brought to the clinical patient.

Disclosure of Invention

The invention aims to provide an improved disposable anti-thrombus indwelling needle, which overcomes the defects that the existing indwelling needle is easy to bend or shake due to an elastic extension tube between a liquid stopping clip or a liquid stopping sheet and a catheter seat, so that a clinical patient has danger and bad hidden trouble.

The purpose of the invention is realized as follows: the invention is composed of a conduit, a conduit seat, an elastic extension tube and a liquid stopping clamp, wherein the conduit is arranged at one end of the conduit seat, the elastic extension tube is fixedly connected through a side joint of the conduit seat and penetrates through the liquid stopping clamp, and the liquid stopping clamp is directly connected to the conduit seat, so that the liquid stopping clamp rotates around the elastic extension tube and cannot move back and forth along the elastic extension tube; the side joint of the catheter seat is also provided with a convex or concave clamping position for connecting the liquid stopping clamp.

The catheter is arranged at one end of the catheter seat, the braided tube is fixed with the side joint of the catheter seat and is connected with the elastic extension tube through the adapter, the adapter is connected with the liquid stopping clamp, one end, far away from the catheter seat, of the braided tube is connected with the adapter, and the liquid stopping clamp is arranged on the adapter, so that the liquid stopping clamp rotates around the adapter and cannot move back and forth along the elastic extension tube.

The invention also comprises a guide tube, a guide tube seat, an elastic extension tube, a braided tube, a fixed sleeve and a liquid stopping clamp, wherein the guide tube is arranged at one end head of the guide tube seat, one end of the braided tube is connected with the side joint of the guide tube seat, the other end of the braided tube is connected with the elastic extension tube by a glue bonding, welding or mechanical locking method, the liquid stopping clamp penetrates through the reinforced elastic extension tube consisting of the braided tube and the elastic extension tube, one end head of the braided tube far away from the guide tube seat is connected with the liquid stopping clamp, the fixed sleeve fixes the liquid stopping clamp on the elastic extension tube, and the clamping part of the liquid stopping clamp is just close to the joint of the elastic extension tube and the braided tube, so that the liquid stopping clamp rotates around the elastic extension tube and cannot move back and forth along the elastic extension tube.

Still further, the invention is composed of the main components of a catheter, a catheter seat, an elastic extension tube, a braided tube, a fixed sleeve, a reinforced fixed sleeve and a liquid stopping clamp, wherein, the catheter is arranged at one end head of the catheter seat, one end of the braided tube is fixed with the side joint of the catheter seat, the other end of the braided tube is connected with the elastic extension tube by glue bonding, welding or mechanical locking, the liquid stopping clamp passes through the reinforced elastic extension tube consisting of the braided tube and the elastic extension tube, one end head of the braided tube far away from the catheter seat is provided with a reinforced fixed sleeve which prevents the liquid stopping clamp from moving towards the catheter seat, the other end of the liquid stopping clamp is fixed on the elastic extension pipe by the fixing sleeve, and the clamping part of the liquid stopping clamp is just close to the joint of the elastic extension pipe and the braided pipe, so that the liquid stopping clamp rotates around the elastic extension pipe and cannot move back and forth along the elastic extension pipe.

Furthermore, the invention comprises a conduit, a conduit seat, an elastic extension tube, a fixed sleeve and a liquid stopping clamp, wherein the conduit is arranged at one end of the conduit seat, the elastic extension tube is fixedly connected through a side joint of the conduit seat and penetrates through the liquid stopping clamp to connect the liquid stopping clamp close to the conduit seat, and the fixed sleeve is arranged at one end of the liquid stopping clamp far away from the conduit seat and is fixed on the elastic extension tube, so that the liquid stopping clamp rotates around the elastic extension tube and cannot move back and forth along the elastic extension tube.

The beneficial technical measures of the invention are as follows: the invention is composed of a conduit, a conduit seat, an elastic extension tube, a connecting sleeve and a liquid stopping clamp, wherein the conduit is arranged at one end of the conduit seat, the elastic extension tube is fixedly connected with the conduit seat through a side joint of the conduit seat and penetrates through the liquid stopping clamp, the elastic extension tube is sleeved in the connecting sleeve, the conduit seat is connected with the connecting sleeve and is fixed through the side joint of the conduit seat, the liquid stopping clamp fixes the conduit seat through a concave-convex clamping position of the connecting sleeve far away from one end of the conduit seat, and the clamping part of the liquid stopping clamp is just positioned on the elastic extension tube and close to the connecting sleeve and far away from the conduit seat, so that the liquid stopping clamp keeps a certain distance from the conduit seat, and the liquid stopping clamp rotates around the elastic extension tube and cannot move back and forth along the elastic extension.

The invention also has the following better technical proposal:

the invention is composed of a guide pipe, a guide pipe seat, an elastic extension pipe, a connecting pipe and a two-way cock, wherein the guide pipe is arranged at one end head of the guide pipe seat, one end of the connecting pipe is sleeved in a side joint of the guide pipe seat, the other end of the connecting pipe is sleeved in a joint at one end of the two-way cock, the other end of the two-way cock is connected with the elastic extension pipe, a sealing ring is arranged at the joint of the connecting pipe and the side joint of the guide pipe seat, the connecting pipe and the guide pipe seat are sealed by the sealing ring, and the two-way cock rotates around the side joint of the guide pipe seat and cannot move back; the sealing ring can also be arranged at the joint of the connecting pipe and the two-way cock.

The invention is composed of a guide pipe, a guide pipe seat, an elastic extension pipe and a two-way cock, wherein the guide pipe is arranged at one end head of the guide pipe seat, the two-way cock is directly connected to the guide pipe seat, and the two-way cock is sealed between the two-way cock and the side joint of the guide pipe seat through a sealing ring, so that the two-way cock rotates around the side joint of the guide pipe seat and cannot move back and forth along the elastic extension pipe; the two-way cock can also completely fix the side joint of the catheter hub, so that the two-way cock cannot rotate and cannot move back and forth along the elastic extension tube.

The invention comprises a guide tube, a guide tube seat, an elastic extension tube, a braided tube and a two-way cock, wherein the guide tube is arranged at one end of the guide tube seat, one end of the two-way cock is connected with the side joint of the guide tube seat through a section of braided tube, and the other end of the two-way cock is connected with the elastic extension tube. Here, the addition of a braided tube between the catheter hub and the two-way stopcock keeps a certain distance between the two-way stopcock and the catheter hub to facilitate the operation of the medical staff, and the volume of the lumen of the braided tube does not change when the braided tube is bent or shaken. The braided tube is not limited to a braided tube, and may be a spring-reinforced tube, or a tube in which the volume of the lumen of the tube does not change or changes slightly when the tube is bent or shaken.

The invention has simple structure, convenient operation, safety, reliability and low production cost. The flexible extension tube can effectively avoid the phenomenon that the flexible extension tube between the liquid stop clamp or the two-way cock and the catheter seat is bent or shaken to generate the volume change of the tube cavity of the flexible extension tube, thereby ensuring that the medical accident of thrombus does not occur in the whole infusion process, and being widely applied to various clinical infusions.

Drawings

FIG. 1 is a schematic structural diagram according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a second embodiment of the present invention;

FIG. 3 is a schematic diagram of a third embodiment of the present invention;

FIG. 4 is a diagram of a fourth structure according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a fifth embodiment of the present invention;

FIG. 6 is a schematic diagram of a sixth structure according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a seventh structure according to an embodiment of the present invention;

FIG. 8 is an eighth schematic block diagram according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a ninth structure according to an embodiment of the present invention.

Detailed Description

The structure of the invention is further described below with reference to the accompanying drawings and examples:

the labels in the figure are: 1. a catheter hub; 2. an elastic extension tube; 3. liquid stopping clips; 4. weaving a tube; 5. an adapter; 6. fixing a sleeve; 6-1, reinforcing a fixed sleeve; 7. connecting sleeves; 8. a two-way cock; 9. a connecting pipe; 10. a conduit.

In fig. 1, the present invention is composed of aconduit 10, aconduit seat 1, anelastic extension tube 2 and aliquid stopping clip 3, wherein theconduit 10 is installed at one end of theconduit seat 1, theelastic extension tube 2 is fixedly connected through a side joint of theconduit seat 1 and passes through theliquid stopping clip 3, theliquid stopping clip 3 is directly connected to theconduit seat 1, and a clamping part of theliquid stopping clip 3 is just close to the side joint of theconduit seat 1 on theelastic extension tube 2, so that theliquid stopping clip 3 rotates around theelastic extension tube 2 and cannot move back and forth along theelastic extension tube 2; the side joint of thecatheter base 1 is also provided with a convex or concave clamping position for connecting theliquid stopping clamp 3.

In fig. 2, the present invention is composed of acatheter 10, acatheter base 1, anelastic extension tube 2, abraided tube 4, anadapter 5 and aliquid stopping clip 3, wherein thecatheter 10 is installed at one end of thecatheter base 1, thebraided tube 4 is fixed with the side joint of thecatheter base 1 and is connected with theelastic extension tube 2 through theadapter 5, the adapter is connected with theliquid stopping clip 3, one end of thebraided tube 4 far away from thecatheter base 1 is connected with theadapter 5, theliquid stopping clip 3 is installed on theadapter 5, and the clamping part of theliquid stopping clip 3 is just close to the joint of the adapter on theelastic extension tube 2, so that theliquid stopping clip 3 rotates around theadapter 5 and cannot move back and forth along theelastic extension tube 2. Here, a braided tube is added between thecatheter holder 1 and theelastic extension tube 2, so that a certain distance is kept between theliquid stopping clip 3 and thecatheter holder 1 to facilitate the operation of the medical staff, and the volume of the lumen of thebraided tube 4 is not changed when the braided tube is bent or shaken. Thebraided tube 4 is not limited to a braided tube, and may be a spring-reinforced tube, or a tube in which the volume of the lumen of the tube does not change or changes slightly when the tube is bent or shaken.

In fig. 3, the present invention is composed of acatheter 10, acatheter base 1, anelastic extension tube 2, abraided tube 4, afixed sleeve 6 and aliquid stopping clip 3, wherein thecatheter 10 is installed at one end of thecatheter base 1, one end of thebraided tube 4 is fixed with a side joint of thecatheter base 1, the other end of thebraided tube 4 is connected with theelastic extension tube 2 by glue bonding, welding or mechanical locking, theliquid stopping clip 3 passes through the reinforced elastic extension tube composed of thebraided tube 4 and theelastic extension tube 2, one end of thebraided tube 4 far away from thecatheter base 1 is connected with theliquid stopping clip 3, thefixed sleeve 6 fixes theliquid stopping clip 3 on theelastic extension tube 2, and the clamping part of theliquid stopping clip 3 is just close to the joint of thebraided tube 4 on theelastic extension tube 2, so that theliquid stopping clip 3 rotates around theelastic extension tube 2 and cannot move back and forth along theelastic extension tube 2. Here, a section of braided tube is added betweencatheter holder 1 andelastic extension tube 2, so that a certain distance is kept between liquid-stoppingclip 3 andcatheter holder 1 for the convenience of medical staff to operate, and the volume of the lumen ofbraided tube 4 does not change when it bends or shakes. Thebraided tube 4 is not limited to a braided tube, and may be a spring-reinforced tube, or any of various tubes in which the volume of the inner cavity of the tube does not change or changes slightly when the tube is bent or shaken.

In fig. 4, the invention is composed of acatheter 10, acatheter base 1, anelastic extension tube 2, abraided tube 4, afixed sleeve 6, a reinforced fixed sleeve 6-1 and aliquid stopping clip 3, wherein thecatheter 10 is installed at one end of thecatheter base 1, one end of thebraided tube 4 is fixed with a side joint of thecatheter base 1, the other end of thebraided tube 4 is connected with theelastic extension tube 2 through glue bonding, welding or mechanical locking, theliquid stopping clip 3 passes through the reinforced elastic extension tube composed of thebraided tube 4 and theelastic extension tube 2, one end of thebraided tube 4 far away from thecatheter base 1 is installed with the reinforced fixed sleeve 6-1, the reinforced fixed sleeve 6-1 prevents theliquid stopping clip 3 from moving towards thecatheter base 1, thefixed sleeve 6 fixes the other end of theliquid stopping clip 3 on theelastic extension tube 2, and the clamping part of theliquid stopping clip 3 is just close to the joint of thebraided tube 4 on theelastic extension tube 2, theliquid stop clip 3 is rotated around theelastic extension tube 2 and cannot move back and forth along theelastic extension tube 2. Here, a section of braided tube is added betweencatheter holder 1 andelastic extension tube 2, so that a certain distance is kept between liquid-stoppingclip 3 andcatheter holder 1 for the convenience of medical staff to operate, and the volume of the lumen ofbraided tube 4 does not change when it bends or shakes. Thebraided tube 4 is not limited to a braided tube, and may be a spring-reinforced tube, or any of various tubes in which the volume of the inner cavity of the tube does not change or changes slightly when the tube is bent or shaken.

In fig. 5, the present invention is composed of acatheter 10, acatheter base 1, anelastic extension tube 2, afixing sleeve 6 and aliquid stopping clip 3, wherein thecatheter 10 is installed at one end of thecatheter base 1, theelastic extension tube 2 is fixedly connected through a side joint of thecatheter base 1 and passes through theliquid stopping clip 3, theliquid stopping clip 3 is connected close to thecatheter base 1, and thefixing sleeve 6 is installed at one end of theliquid stopping clip 3 far from thecatheter base 1 and fixed on theelastic extension tube 2, so that theliquid stopping clip 3 rotates around theelastic extension tube 2 and cannot move back and forth along theelastic extension tube 2.

In fig. 6, the present invention is composed of aconduit 10, aconduit seat 1, anelastic extension tube 2, a connectingsleeve 7 and aliquid stopping clip 3, wherein theconduit 10 is installed at one end of theconduit seat 1, theelastic extension tube 2 is fixedly connected through a side joint of theconduit seat 1 and passes through theliquid stopping clip 3, theelastic extension tube 2 is sleeved in the connectingsleeve 7, theconduit seat 1 is connected and fixed with the connectingsleeve 7 through a side joint of theconduit seat 1, and theliquid stopping clip 3 is fixed through a concave-convex clip position of the connectingsleeve 7 far away from one end of theconduit seat 1, so as to ensure that theliquid stopping clip 3 rotates around theelastic extension tube 2 and cannot move back and forth along theelastic extension tube 2; the clamping part of the liquid stoppingclamp 3 is just positioned on theelastic extension pipe 2 close to the connectingsleeve 7 and far away from thecatheter seat 1. Therefore, theelastic extension pipe 2 is sleeved in the connectingsleeve 7, the connectingsleeve 7 which is not easy to bend and deform is used for reinforcing and protecting theelastic extension pipe 2, and theelastic extension pipe 2 cannot bend or shake.

In fig. 7, the present invention is composed of aguide tube 10, aguide tube holder 1, anelastic extension tube 2, aconnection tube 9 and a two-way cock 8, wherein theguide tube 10 is installed at one end of theguide tube holder 1, one end of theconnection tube 9 is sleeved in the side joint of theguide tube holder 1, the other end of theconnection tube 9 is sleeved in the joint of one end of the two-way cock 8, the other end of the two-way cock 8 is connected with theelastic extension tube 2, a sealing ring is arranged at the joint of theconnection tube 9 and the side joint of theguide tube holder 1, theconnection tube 9 and theguide tube holder 1 are sealed by the sealing ring, so that the two-way cock 8 rotates around the side joint of theguide tube holder 1 and can not move back; the sealing ring can also be mounted at the connection of thecoupling tube 9 and the two-way tap 8.

In fig. 8, the present invention is composed of the main components of acatheter 10, acatheter holder 1, anelastic extension tube 2 and a two-way cock 8, wherein thecatheter 10 is mounted on one end of thecatheter holder 1, the two-way cock 8 is directly connected to thecatheter holder 1, the two-way cock 8 is sealed with a side joint of thecatheter holder 1 by a sealing ring, and the two-way cock 8 rotates around the side joint of thecatheter holder 1 and cannot move back and forth along theelastic extension tube 2; the two-way cock 8 can also completely fix the side joint of thecatheter hub 1, so that the two-way cock 8 cannot rotate and cannot move back and forth along theelastic extension tube 2.

In fig. 9, the present invention is composed of the main components of acatheter 10, acatheter hub 1, anelastic extension tube 2, abraided tube 4 and a two-way cock 8, wherein thecatheter 10 is mounted on one end of thecatheter hub 1, and one end of the two-way cock 8 is connected to the side joint of thecatheter hub 1 through a section of thebraided tube 4, and the other end is connected to theelastic extension tube 2. Here, the addition of a braided tube between thecatheter hub 1 and the two-way stopcock 8 keeps a certain distance between the two-way stopcock 8 and thecatheter hub 1 for the convenience of medical staff, and the volume of thebraided tube 4 in the lumen does not change when the braided tube is bent or shaken. Thebraided tube 4 is not limited to thebraided tube 4, and may be a spring-reinforced tube, or any of various tubes in which the volume of the lumen of the tube does not change or changes slightly when the tube is bent or shaken.

In addition, theliquid stopping clip 3 mentioned above can fix theliquid stopping clip 3 on theelastic extension tube 2 besides rotating around theelastic extension tube 2; furthermore, theliquid stop clamp 3 can also be replaced by a two-way cock 8. When the two-way cock 8 is mounted on theelastic extension tube 2. When in transfusion, the knob of the two-way cock 8 is rotated to the two-way direction position, and the liquid medicine flows; otherwise, the infusion is stopped. The two-way cock 8 can also control positive pressure infusion as well as theliquid stop clamp 3 without causing a thrombotic medical accident.

All technical measures of the invention can effectively avoid the phenomenon that theliquid stopping clamp 3 or theelastic extension tube 2 between the two-way cock 8 and thecatheter seat 1 is bent or shaken to generate the change of the tube cavity volume of theelastic extension tube 2, thereby ensuring that the medical accident of thrombus does not occur in the whole infusion process.

What has been described above is merely a preferred embodiment of the present invention. It should be noted that variations and modifications can be made by those skilled in the art without departing from the principle of the present invention, and this is considered to fall within the scope of the present invention. For example, thebraided tube 4 and the connectingtube 9 described above may be replaced by any spring-reinforced tube having an elastic function or any of various tubes whose inner cavity does not undergo or slightly undergoes a volume change when bent or shaken, respectively; theliquid stopping clip 3 can be replaced by a liquid stopping sheet; furthermore, any product, technique or solution designed, completed or contemplated by or with reference to the present invention or all technical solutions inspired by the present invention, for use in medical applications, falls fully within the scope of the claims of the present invention.

Claims (5)

1. Disposable prevents thrombus and keeps somewhere needle, its characterized in that: the catheter is composed of a catheter (10), a catheter seat (1), an elastic extension tube (2), a braided tube (4), a fixed sleeve (6) and a liquid stopping clamp (3), wherein the catheter (10) is installed at one end of the catheter seat (1), one end of the braided tube (4) is fixed with a side joint of the catheter seat (1), the other end of the braided tube (4) is connected with the elastic extension tube (2) through glue bonding, welding or a mechanical locking method, the liquid stopping clamp (3) penetrates through the reinforced elastic extension tube composed of the braided tube (4) and the elastic extension tube (2), one end of the braided tube (4) far away from the catheter seat (1) is connected with the liquid stopping clamp (3), the fixed sleeve (6) fixes the liquid stopping clamp (3) on the elastic extension tube (2), and the clamping part of the liquid stopping clamp (3) is just right at the position on the elastic extension tube (2) close to the connection part of the braided tube (4), the liquid stopping clamp (3) rotates around the elastic extension pipe (2) and cannot move back and forth along the elastic extension pipe (2), a section of braided pipe is additionally arranged between the catheter seat and the elastic extension pipe, the distance between the liquid stopping clamp and the catheter seat is kept so as to be convenient for medical workers to operate, the volume in a lumen of the braided pipe does not change when the braided pipe is bent or shaken, and the liquid stopping clamp is suitable for avoiding the situation that the clinical patients suffer from pain and the life harm is caused due to the fact that blood reflows to form thrombus.

2. Disposable prevents thrombus and keeps somewhere needle, its characterized in that: comprises a catheter (10), a catheter seat (1), an elastic extension tube (2), a braided tube (4), a joint (5) and a liquid stopping clip (3), wherein the catheter (10) is arranged at one end of the catheter seat (1), the braided tube (4) is fixed with the side joint of the catheter seat (1) and is connected with the elastic extension tube (2) through the adapter (5), the adapter is connected with the liquid stopping clamp (3), one end of the braided tube (4) far away from the catheter seat (1) is connected with the adapter (5), the liquid stopping clamp (3) is arranged on the adapter (5) so that the liquid stopping clamp (3) rotates around the adapter (5) and can not move back and forth along the elastic extension pipe (2), a section of braided tube is additionally arranged between the catheter seat and the elastic extension tube, so that the distance between the liquid stopping clamp and the catheter seat is kept to facilitate the operation of medical personnel, and the volume in the lumen of the braided tube is not changed when the braided tube bends or shakes.

3. Disposable prevents thrombus and keeps somewhere needle, its characterized in that: the catheter is composed of a catheter (10), a catheter seat (1), an elastic extension tube (2), a braided tube (4), a fixing sleeve (6), a reinforcing fixing sleeve (6-1) and a liquid stopping clamp (3), wherein the catheter (10) is installed at one end of the catheter seat (1), one end of the braided tube (4) is fixed with a side joint of the catheter seat (1), the other end of the braided tube (4) is connected with the elastic extension tube (2) in a glue bonding, welding or mechanical locking mode, the liquid stopping clamp (3) penetrates through the reinforced elastic extension tube composed of the braided tube (4) and the elastic extension tube (2), the reinforcing fixing sleeve (6-1) is installed at one end of the braided tube (4) far away from the catheter seat (1), the reinforcing fixing sleeve (6-1) prevents the liquid stopping clamp (3) from moving towards the catheter seat (1), and the fixing sleeve (6) fixes the other end of the liquid stopping clamp (3) on the elastic extension tube (2), and the clamping part of the liquid stopping clamp (3) is just close to the joint of the braided tube (4) on the elastic extension tube (2), so that the liquid stopping clamp (3) rotates around the elastic extension tube (2) and cannot move back and forth along the elastic extension tube (2), a section of braided tube is additionally arranged between the catheter seat and the elastic extension tube, the distance between the liquid stopping clamp and the catheter seat is kept to facilitate the operation of medical personnel, and the volume in the lumen of the braided tube does not change when the braided tube bends or shakes.

4. Disposable prevents thrombus and keeps somewhere needle, its characterized in that: the catheter is composed of main components of a catheter (10), a catheter seat (1), an elastic extension tube (2), a connecting sleeve (7) and a liquid stopping clamp (3), wherein the catheter (10) is installed at one end of the catheter seat (1), the elastic extension tube (2) is fixedly connected with the connecting sleeve (7) through a side connector of the catheter seat (1) and penetrates through the liquid stopping clamp (3), the elastic extension tube (2) is sleeved into the connecting sleeve (7), the catheter seat (1) is connected and fixed with the connecting sleeve (7) through a side connector of the catheter seat (1), the liquid stopping clamp (3) is fixed through a concave-convex clamping position of the connecting sleeve (7) far away from one end of the catheter seat (1), the clamping position of the liquid stopping clamp (3) is just positioned on the elastic extension tube (2) and close to the connecting sleeve (7) and far away from the catheter seat (1), a certain distance between the liquid stopping clamp (3) and the catheter seat (1) is ensured, and the liquid stopping clamp (3) rotates around the elastic extension tube (2) and cannot move back and forth along the elastic extension tube (2 And the connecting sleeve which is not easy to bend and deform is used for reinforcing and protecting the elastic extension pipe, so that the elastic extension pipe is not bent or shaken.

5. Disposable prevents thrombus and keeps somewhere needle, its characterized in that: the catheter is composed of a catheter (10), a catheter seat (1), an elastic extension tube (2), a braided tube (4) and a two-way cock (8), wherein the catheter (10) is installed at one end of the catheter seat (1), one end of the two-way cock (8) is connected with a side joint of the catheter seat (1) through the braided tube (4), the other end of the two-way cock is connected with the elastic extension tube (2), the braided tube is additionally arranged between the catheter seat and the elastic extension tube, a distance is kept between a liquid stopping clamp and the catheter seat so as to facilitate the operation of medical staff, and the volume in a lumen of the braided tube is not changed when the braided tube is bent or shaken.

Images