CN205127005U - Needle is kept somewhere to pressure -fired - Google Patents

Abstract

The utility model discloses a micro positive pressure indwelling needle, which comprises an indwelling needle base, an indwelling hose, a puncture needle and an infusion needle, one end of the indwelling needle base is provided with a medicinal liquid output port, the indwelling hose and the medicinal liquid of the indwelling needle base The outlet is connected, and the other end of the indwelling needle seat is the penetrating end of the puncture needle and the infusion needle. The puncture needle is used to assist the indwelling hose to penetrate into the venous blood vessel. One end of the closing plug is closely attached to the output port of the medicinal liquid to close the output port of the medicinal liquid; the closing plug adopts an elastic soft closing plug. Using the micro positive pressure indwelling needle to generate micro positive pressure anti-thrombosis method, after the infusion needle is pulled out, a micro positive pressure can be generated in the indwelling tube, which can prevent blood from flowing back into the indwelling tube, thus avoiding the indwelling tube. The formation of thrombus, and the needle can also be used to draw blood from the patient.

Description

micro positive pressure indwelling needle

technical field

The utility model relates to a venous indwelling needle, in particular to an antithrombotic venous indwelling needle.

Background technique

The existing indwelling needles are divided into Y-type and straight-type. Because the Y-type is convenient, Y-type indwelling needles are generally used in my country; while the straight-type indwelling needles are troublesome to operate, but the probability of thrombus formation is lower than that of Y-type indwelling needles. Straight catheters are commonly used.

During the indwelling period of the traditional indwelling needle, thrombus may occur. For this reason, the relevant operating procedures stipulate that the cannula should be flushed with normal saline every 6 to 8 hours, and the cannula should be sealed with anticoagulant.

In order to solve the above shortcomings, patented products of positive pressure joints and anti-backflow devices have appeared in recent years, but the existing positive pressure joints and anti-backflow devices have complex structures, and they all use springs to instantly squeeze the liquid. The pressure state does not last long.

In addition, on October 2, 2013, the Chinese Patent Office published a patent with the publication (announcement) No. CN103330970A, the patent name being a self-sealing anti-thrombotic venous indwelling needle and its method of use. The utility model discloses a self-sealing anti-thrombotic venous indwelling needle Needle and its use method, the self-sealing antithrombotic venous indwelling needle includes a needle base, a catheter arranged at the front end of the needle base, and a puncture core axially passing through the needle base and the catheter, and the inner cavity of the needle base is cut off It is divided into two parts: a positive pressure chamber and an infusion chamber, the infusion chamber communicates with the catheter, and the partition part is made of medical sealing material; the partition part is provided with a seepage channel for connecting the positive pressure chamber and the infusion chamber When there is a pressure difference, the liquid in the positive pressure chamber can automatically and slowly flow into the infusion chamber through the seepage channel. The self-styled anti-thrombotic venous indwelling needle and its use method of the utility model have the following beneficial technical effects; when the infusion is suspended according to the conventional operation, the tube is automatically sealed, and the liquid in the positive pressure chamber slowly flows into the infusion chamber through the seepage channel; As the pressure difference between the chamber and the infusion chamber decreases, the seepage velocity will also slow down accordingly, so that the positive pressure chamber can maintain positive pressure for a long time. This patent application document was developed by the applicant. Although it has the function of anti-thrombosis, the biggest shortcoming of this patent application document (including all existing indwelling needles) is that since the medicinal liquid will flow through the cavity of the needle holder Therefore, the indwelling needle cannot be used to draw blood from the patient.

This patent is an improvement to the straight indwelling needle.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art and provide a micro-positive pressure indwelling needle, which can not only prevent thrombus, but also draw blood for patients.

In order to achieve the above object, the technical solution adopted in the utility model is:

Micro positive pressure indwelling needle, including indwelling needle base, indwelling hose, puncture needle and infusion needle, one end of the indwelling needle base is provided with a liquid medicine output port, the indwelling hose is connected to the liquid medicine output port of the indwelling needle base, and the indwelling needle base The other end of the needle is the piercing end of the puncture needle and the infusion needle. The puncture needle is used to penetrate the indwelling needle seat from the penetrating end of the indwelling needle seat, and pass through the indwelling hose through the liquid medicine output port. The indwelling hose is inserted into the venous blood vessel, and a closing plug is provided in the indwelling needle seat, and one end of the closing plug is closely attached to the output port of the medicinal liquid to close the output port of the medicinal liquid.

Further, the closure plug adopts an elastic soft closure plug.

Further, the other end of the closure plug is flush with the penetrating end of the indwelling needle hub. This design helps to sterilize the end of the closure.

Further, one end of the puncture needle is provided with a handle, and the end of the handle is provided with a cap capable of covering the penetrating end of the indwelling needle hub.

The beneficial effects of the utility model:

Due to the adoption of the above-mentioned structural form, a closing plug is added to seal the liquid medicine output port. When the liquid medicine is input, the liquid medicine directly enters the indwelling hose from the infusion needle instead of entering the cavity of the indwelling needle holder. The airtight infusion cavity is greatly reduced, which effectively reduces the return of blood, which not only helps to avoid the formation of thrombus in the indwelling tube, but also can use the indwelling tube to draw blood from the patient;

Due to the use of an elastic soft closure plug, the end surface of the closure plug forms a concave surface during the infusion needle pull-out process. After the infusion needle is pulled out, the concave surface resets to generate a slight positive pressure in the indwelling tube, preventing blood from flowing back into the indwelling tube. In the hose, the formation of thrombus in the indwelling hose is avoided, thereby reducing nursing work, improving medical quality, and saving medical costs.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Fig. 1 is the structural representation of the utility model.

In the figure: 1. Indwelling needle seat; 2. Indwelling hose; 3. Puncture needle; 4. Infusion needle; 5. Liquid medicine output port; 6. Penetrating end; 7. Closing plug; .

detailed description

As shown in Figure 1, the micro positive pressure indwelling needle includes an indwelling needle base 1, an indwelling hose 2, a puncture needle 3 and an infusion needle 4. One end of the indwelling needle base 1 is provided with a liquid medicine output port 5, and the indwelling hose 2 is connected to the The medicine liquid output port 5 of the indwelling needle base 1 is connected, and the other end of the indwelling needle base 1 is the penetration end 6 of the puncture needle and the infusion needle. The puncture needle 3 is used to penetrate through the penetration end of the indwelling needle base 1 The indwelling needle holder 1 passes through the indwelling hose 2 through the medicinal liquid output port 5, and the indwelling hose 2 is attached to penetrate into the venous blood vessel. The indwelling needle holder 1 is provided with a closing plug 7, and the closure plug 7 One end is close to the liquid medicine output port 5 to close the liquid medicine output port 5; This design helps to sterilize the end of the closure.

The closure plug 7 adopts an elastic soft closure plug, and after the puncture needle 3 and the infusion needle 4 are pulled out, the closure plug 7 will be automatically closed without leakage.

One end of the puncture needle 3 is provided with a handle 8, and the end of the handle 8 is provided with a cap 9 capable of covering the penetration end 6 of the indwelling needle holder.

The micro positive pressure indwelling needle produces a micro positive pressure antithrombotic method, comprising the following steps: A. After the indwelling hose is placed in the venous vessel, the infusion needle is inserted into the indwelling needle seat from the penetrating end of the indwelling needle seat, and passed through the closed The plug communicates with the indwelling hose, and the infusion starts; B. When stopping the infusion, first slowly pull out the infusion needle from the indwelling needle seat, and during the process of pulling out, the friction between the infusion needle and the closure plug Next, the end face of the closing plug located at the liquid medicine output port forms a concave surface. At this time, the infusion needle is still in communication with the indwelling hose, and the medicine liquid is delivered to the indwelling hose; C. After the infusion needle is pulled out, the end face of the closing plug The concave surface of the indwelling tube is reset, so that a slight positive pressure is generated in the indwelling tube, preventing blood from flowing back into the indwelling tube, thereby avoiding the formation of thrombus in the indwelling tube.

The above description is only a preferred embodiment of the utility model, and of course it cannot limit the scope of rights of the utility model. Replacement does not depart from the protection scope of the technical solution of the utility model.

Claims (4)

1. a pressure-fired remaining needle, comprise indwelling needle, indwelling flexible pipe, puncture needle and transfusion needle, one end of indwelling needle is provided with medicinal liquid delivery outlet, indwelling flexible pipe is connected with the medicinal liquid delivery outlet of indwelling needle, the other end of indwelling needle be puncture needle and transfusion needle penetrate end, described puncture needle, penetrate in indwelling needle in order to the end that penetrates from indwelling needle, pass from indwelling flexible pipe through medicinal liquid delivery outlet, attached retention is put flexible pipe and is penetrated vein blood vessel, it is characterized in that: in described indwelling needle, be provided with closing cock, one end of described closing cock is close to medicinal liquid equipped at outlet port and is closed by medicinal liquid delivery outlet.

2. pressure-fired remaining needle according to claim 1, is characterized in that: described closing cock adopts resilient soft closing cock.

3. pressure-fired remaining needle according to claim 1 and 2, is characterized in that: the other end and the penetrating of indwelling needle of described closing cock are held level with both hands together.

4. pressure-fired remaining needle according to claim 2, is characterized in that: one end of described puncture needle is provided with handle, and the end of described handle is provided with and indwelling needle can be penetrated the block held and encase.