Positive-pressure self-closing indwelling needle

Abstract

The invention discloses a positive-pressure self-closing indwelling needle. The positive-pressure self-closing indwelling needle comprises a catheter assembly, a needle tube assembly and an infusion connector assembly, and the catheter assembly comprises a three-way catheter seat and a catheter arranged at the front end of the three-way catheter seat; the needle tube assembly comprises a needle seat and a steel needle fixedly arranged on the needle seat, the steel needle is inserted into the catheter and the three-way catheter seat, and the three-way catheter seat is connected with an infusion connector through an indwelling needle infusion switch; and the indwelling needle infusion switch is provided with an energy storage and liquid storage device, the energy storage and liquid storage device automatically outputs liquid stored in the energy storage and liquid storage device when releasing stored energy, and the indwelling needle infusion switch is automatically turned off when output of the stored liquid is finished. According to the positive-pressure self-closing indwelling needle, the structure is simple and reasonable, process is simple and convenient to manufacture, operation is simple and convenient, the existing infusion specifications are conformed, the defects in the background technology are overcome, the risks in the background technology are overcome, and the problems of blood coagulation, thrombus formation or blockage in the use process of a venous indwelling needle are effectively solved.

Description

technical field

[0001] The invention relates to the field of medical devices, in particular to a positive-pressure slow-release antithrombotic indwelling needle with positive pressure and automatic closure for clinical venipuncture. Background technique

[0002] With the extensive use of indwelling needle product technology in clinical practice, the hidden risks of indwelling catheters have gradually been discovered and reported. These problems are mainly the problems of blood return, coagulation and blockage of indwelling catheters. Up to now, in order to overcome the risk of coagulation and blockage of venous indwelling needles, positive pressure connectors and catheter flushers are currently used clinically to solve the above problems. One of the main causes of blood return and tube blockage is the positive pressure connector of the current positive pressure indwelling needle. After the infusion is completed, due to structural problems, when the connector of the infusion ...

Examples

Embodiment 1

[0032] Embodiment one: see attached figure 1 , 2 Shown:

[0033]A positive pressure auto-closing indwelling needle, comprising a catheter assembly, a needle tube assembly, and an infusion connector 1 or an infusion connector 1 assembly, the catheter assembly including a three-way catheter adapter 5 and a catheter 6 arranged at the front end of the three-way catheter adapter 5; The needle tube assembly includes a needle base 4 and a steel needle 7 fixed on the needle base 4, the steel needle 7 is inserted into the catheter 6 and the three-way catheter base 5, and the three-way catheter base 5 Connect the infusion connector 1 or / and the components of the infusion connector 1 through the infusion switch 3 or / and the infusion switch 3 and the long conduit 2; the indwelling needle infusion switch 3 is provided with an energy storage device, and the energy storage device is released When storing energy, the indwelling needle infusion switch 3 can automatically output the liquid st...

Embodiment 2

[0036] Embodiment two: see attached figure 1 , 2 , 7, and 8 show:

[0037] A positive pressure auto-closing indwelling needle, comprising a catheter assembly, a needle tube assembly, and an infusion connector 1 or an infusion connector 1 assembly, the catheter assembly including a three-way catheter adapter 5 and a catheter 6 arranged at the front end of the three-way catheter adapter 5; The needle tube assembly includes a needle base 4 and a steel needle 7 fixed on the needle base 4, the steel needle 7 is inserted into the catheter 6 and the three-way catheter base 5, and the three-way catheter base 5 Connect the infusion connector 1 or / and the components of the infusion connector 1 through the infusion switch 3 or / and the infusion switch 3 and the long conduit 2; the indwelling needle switch 3 includes a liquid storage cylinder 10 and a piston 12 with an infusion outlet in its inner cavity; A liquid outlet hole 20 is provided at the center of the bottom of the liquid stora...

Embodiment 3

[0040] Embodiment three: see attached figure 1 , 4 Shown:

[0041] A positive pressure auto-closing indwelling needle, comprising a catheter assembly, a needle tube assembly, and an infusion connector 1 or an infusion connector 1 assembly, the catheter assembly including a three-way catheter adapter 5 and a catheter 6 arranged at the front end of the three-way catheter adapter 5; The needle tube assembly includes a needle base 4 and a steel needle 7 fixed on the needle base 4, the steel needle 7 is inserted into the catheter 6 and the three-way catheter base 5, and the three-way catheter base 5 Connect the indwelling needle infusion switch 3 through the long catheter 2, and the other end of the indwelling needle infusion switch 3 is connected to the infusion joint 1 or the infusion joint 1 assembly; the indwelling needle infusion switch 3 includes a liquid storage cylinder 10 and a piston with an infusion outlet in its inner cavity 12. A liquid outlet hole 20 is provided at ...

technical field

[0001] The invention relates to the field of medical devices, in particular to a positive-pressure slow-release antithrombotic indwelling needle with positive pressure and automatic closure for clinical venipuncture. Background technique

[0002] With the extensive use of indwelling needle product technology in clinical practice, the hidden risks of indwelling catheters have gradually been discovered and reported. These problems are mainly the problems of blood return, coagulation and blockage of indwelling catheters. Up to now, in order to overcome the risk of coagulation and blockage of venous indwelling needles, positive pressure connectors and catheter flushers are currently used clinically to solve the above problems. One of the main causes of blood return and tube blockage is the positive pressure connector of the current positive pressure indwelling needle. After the infusion is completed, due to structural problems, when the connector of the infusion ...

Examples

Embodiment 1

[0032] Embodiment one: see attached figure 1 , 2 Shown:

[0033]A positive pressure auto-closing indwelling needle, comprising a catheter assembly, a needle tube assembly, and an infusion connector 1 or an infusion connector 1 assembly, the catheter assembly including a three-way catheter adapter 5 and a catheter 6 arranged at the front end of the three-way catheter adapter 5; The needle tube assembly includes a needle base 4 and a steel needle 7 fixed on the needle base 4, the steel needle 7 is inserted into the catheter 6 and the three-way catheter base 5, and the three-way catheter base 5 Connect the infusion connector 1 or / and the components of the infusion connector 1 through the infusion switch 3 or / and the infusion switch 3 and the long conduit 2; the indwelling needle infusion switch 3 is provided with an energy storage device, and the energy storage device is released When storing energy, the indwelling needle infusion switch 3 can automatically output the liquid st...

Embodiment 2

[0036] Embodiment two: see attached figure 1 , 2 , 7, and 8 show:

[0037] A positive pressure auto-closing indwelling needle, comprising a catheter assembly, a needle tube assembly, and an infusion connector 1 or an infusion connector 1 assembly, the catheter assembly including a three-way catheter adapter 5 and a catheter 6 arranged at the front end of the three-way catheter adapter 5; The needle tube assembly includes a needle base 4 and a steel needle 7 fixed on the needle base 4, the steel needle 7 is inserted into the catheter 6 and the three-way catheter base 5, and the three-way catheter base 5 Connect the infusion connector 1 or / and the components of the infusion connector 1 through the infusion switch 3 or / and the infusion switch 3 and the long conduit 2; the indwelling needle switch 3 includes a liquid storage cylinder 10 and a piston 12 with an infusion outlet in its inner cavity; A liquid outlet hole 20 is provided at the center of the bottom of the liquid stora...

Embodiment 3

[0040] Embodiment three: see attached figure 1 , 4 Shown:

[0041] A positive pressure auto-closing indwelling needle, comprising a catheter assembly, a needle tube assembly, and an infusion connector 1 or an infusion connector 1 assembly, the catheter assembly including a three-way catheter adapter 5 and a catheter 6 arranged at the front end of the three-way catheter adapter 5; The needle tube assembly includes a needle base 4 and a steel needle 7 fixed on the needle base 4, the steel needle 7 is inserted into the catheter 6 and the three-way catheter base 5, and the three-way catheter base 5 Connect the indwelling needle infusion switch 3 through the long catheter 2, and the other end of the indwelling needle infusion switch 3 is connected to the infusion joint 1 or the infusion joint 1 assembly; the indwelling needle infusion switch 3 includes a liquid storage cylinder 10 and a piston with an infusion outlet in its inner cavity 12. A liquid outlet hole 20 is provided at ...

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