CN105169523A - Continuous positive-pressure thrombus-preventive venous indwelling needle - Google Patents

Abstract

A continuous positive pressure antithrombotic venous indwelling needle, which is provided with a needle, a needle seat, a three-way joint, an infusion tube, a liquid stop clamp, a liquid seepage device, and a continuous positive pressure liquid supply device; the liquid seepage device is assembled in the second input end , The continuous positive pressure liquid supply device is assembled on the second input end of the three-way joint. The liquid seepage device is provided with a conduit and a liquid seepage fiber column assembled in the conduit. The continuous positive pressure liquid supply device is equipped with a push rod, a sleeve and a spring; the push rod has more than two inner core rods that are sleeved and connected, and the latter inner core rod is sleeved on the outside of the previous inner core rod; The front end of the inner core rod is provided with a rubber plug, the end of the rearmost inner core rod is connected with a pull button, the push rod is assembled in the sleeve, the spring is sleeved on the push rod, and the spring is located between the rubber plug and the pull button. The continuous positive pressure antithrombotic venous indwelling needle can keep for a long time for seepage delivery and prevent blood vessel thrombosis.

Description

A continuous positive pressure antithrombotic venous indwelling needle

technical field

The invention relates to the technical field of medical devices, in particular to a continuous positive pressure antithrombotic venous indwelling needle.

Background technique

Infusion sets are one of the commonly used medical supplies for intravenous injection in the medical field. With the development of science and technology, venous indwelling needles can be left in place for a long time. For patients who need continuous infusion, their use can avoid blood vessel damage and mental pain caused by repeated punctures, and reduce the workload of venipuncture for medical staff. In addition, the intravenous indwelling needle also has the function of protecting blood vessels due to its good flexibility, little irritation to blood vessels, and few occurrences of catheter discount and catheter tip damage.

During the indwelling period of the venous indwelling needle in the prior art, the tube needs to be flushed every few hours in order to prevent thrombus formation, which not only increases the workload of the medical staff and the cost of flushing the catheter, but also has the risk of thrombus.

Therefore, aiming at the deficiencies of the prior art, it is necessary to provide a continuous positive pressure antithrombotic venous indwelling needle to overcome the deficiencies of the prior art.

Contents of the invention

One of the objectives of the present invention is to avoid the deficiencies in the prior art and provide a continuous positive pressure antithrombotic indwelling needle, which can continuously infuse infusion to prevent blood clots during the stop of infusion Formation.

The above object of the present invention is achieved through the following technical measures.

Provided is a continuous positive pressure antithrombotic venous indwelling needle, which is provided with a needle, a needle seat, a three-way joint, an infusion tube, a liquid stop clip, a seepage device and a continuous positive pressure liquid supply device;

The needle is assembled with the needle base, the three-way joint is provided with a first input end, a second input end and an output end, and the output end of the three-way joint is connected with the input end of the needle base. An infusion tube, the liquid stop clamp is assembled on the infusion tube, the seepage device is assembled in the second input end, and the continuous positive pressure liquid supply device is assembled in the second input end of the tee joint .

Preferably, the liquid seepage device is provided with a conduit and a liquid seepage fiber column assembled in the conduit.

Preferably, the above-mentioned fiber column in the catheter has a diameter of 0.1-1 mm.

Preferably, the above-mentioned continuous positive pressure liquid supply device is provided with a push rod, a sleeve and a spring;

The push rod has more than two inner core rods that are socketed and assembled. The latter inner core rod is sleeved on the outside of the previous inner core rod. The inner wall surface of the front end of an inner core rod is provided with an inner convex edge, and the inner convex edge of the latter inner core rod matches the outer convex edge of the previous inner core rod;

The front end of the frontmost inner core rod is provided with a rubber plug, and the end of the rearmost inner core rod is connected with a pull button, the pull button has an annular part, and the inner wall surface of the annular part is provided with an internal thread;

The push rod is assembled in the sleeve, the spring is sleeved on the push rod, and the spring is located between the rubber plug and the pull button;

The outer wall surface of the end of the sleeve is provided with an outer thread, and the outer thread matches the inner thread.

Preferably, the above-mentioned sleeve is further provided with buckle protrusions, and the buckle protrusions are fixed to the sleeve; the annular part of the pull button is provided with an assembly groove matching the buckle protrusions.

Preferably, the above-mentioned inner core rod is set as a round tube or a square tube or a rectangular tube.

Preferably, the inner wall of the second input end of the tee joint is provided with a raised ring or semi-circular ring, and the conduit is assembled at the position of the circular ring or semi-circular ring; or

The hole diameter of the second input end of the tee joint is set to a structure that gradually decreases, and the hole diameter of the outlet end of the second input end is 2-5mm smaller than the hole diameter of the inlet end.

Preferably, the above-mentioned needle hub is provided with a handle plate, and the handle plate is fixed on the needle hub.

Preferably, the above-mentioned tee joint is further provided with a supporting rib, and the two ends of the supporting rib are respectively fixed to the first input end and the second input end.

Preferably, a heparin cap is installed on the first input end of the above-mentioned three-way joint, and the needle is also provided with a notch.

The continuous positive pressure antithrombotic venous indwelling needle of the present invention is provided with a needle head, a needle seat, a three-way joint, an infusion tube, a liquid stop clamp, a liquid seepage device and a continuous positive pressure liquid supply device; the needle head is assembled with the needle seat , the three-way joint is provided with a first input end, a second input end and an output end, an infusion tube is connected between the output end of the three-way joint and the input end of the needle seat, and the liquid stop clamp is assembled In the infusion tube, the liquid seepage device is assembled in the second input end, and the continuous positive pressure liquid supply device is assembled in the second input end of the three-way joint. Since the continuous positive pressure antithrombotic indwelling needle is equipped with a liquid seepage device and a continuous positive pressure liquid supply device, the medicinal liquid in it can be delivered to the blood vessel through the continuous liquid supply device after the infusion is stopped, and can maintain The exudate is transported for a long time to prevent the formation of vascular thrombus, avoid the trouble of medical staff needing to flush the venous indwelling needle within a certain interval, and reduce the cost of flushing the patient.

Description of drawings

The present invention will be further described by using the accompanying drawings, but the content in the accompanying drawings does not constitute any limitation to the present invention.

Fig. 1 is a schematic structural view of Embodiment 1 of a continuous positive pressure antithrombotic venous indwelling needle of the present invention.

FIG. 2 is a schematic diagram of the exploded structure of FIG. 1 .

Fig. 3 is a cross-sectional view of the continuous positive pressure liquid supply device and the tee joint in Fig. 1 .

Fig. 4 is a schematic structural view of the continuous positive pressure liquid supply device in Fig. 1 in a liquid-absorbing state.

FIG. 5 is a schematic diagram of an exploded structure of FIG. 4 .

FIG. 6 is a sectional view of FIG. 4 .

In Figures 1 to 6, including:

Needle 100,

Notch groove 110,

Needle seat 200,

grip plate 210,

Tee joint 300,

The first input terminal 310, the second input terminal 320, the output terminal 330,

Heparin cap 340, support rib 350,

Infusion tube 400, liquid stop clamp 410,

Infiltration device 500,

Conduit 510, seepage fiber column 520,

Continuous positive pressure liquid supply device 600,

Push rod 610,

Inner core rod 611,

The previous inner core rod 601, the outer rib 602,

The rear inner core rod 603, the inner rib 604,

Rubber plug 612, pull button 613, annular part 614,

The internal thread 615 provided by the annular part,

Sleeve 620, buckle projection 621,

Spring 700.

Detailed ways

The present invention is further described in conjunction with the following examples.

Example 1.

A continuous positive pressure anti-thrombotic indwelling needle, as shown in Figure 1, Figure 2, and Figure 3, is provided with a needle head 100, a needle seat 200, a three-way joint 300, an infusion tube 400, a liquid stop clip 410, and a liquid seepage device 500 And continuous positive pressure liquid supply device 600.

The needle head 100 is assembled with the needle hub 200, the three-way joint 300 is provided with a first input end 310, a second input end 320 and an output end 330, and an infusion solution is connected between the output end 330 of the three-way joint 300 and the input end of the needle base 200 The tube 400 and the stop clip 410 are assembled in the infusion tube 400 , the infiltration device 500 is assembled in the second input end 320 , and the continuous positive pressure liquid supply device 600 is assembled in the second input end 320 of the tee joint 300 .

The tee joint 300 is further provided with a support rib 350 , and the two ends of the support rib 350 are respectively fixed to the first input end 310 and the second input end 320 , through the support rib 350 , the tee joint 300 is more firm.

The first input end 310 of the tee joint 300 is equipped with a heparin cap 340 which is a detachable structure. When there is a needle for infusion, directly insert the heparin cap 340 for infusion. For needle-free infusion, the heparin cap 340 can be removed, and the infusion end can be assembled on the first input end 310 . The heparin cap 340 is set in a detachable structure, which is convenient and flexible to use.

In order to facilitate puncturing, the needle hub 200 is provided with a handle plate 210 , and the handle plate 210 is fixed on the needle hub 200 . When puncturing, the medical personnel can hold the grip plate 210 to perform puncturing, which is convenient and stable for puncturing. The needle 100 is also provided with a notch 110, which can return blood sensitively.

Specifically, the liquid seepage device 500 is provided with a conduit 510 and a liquid seepage fiber column 520 assembled in the conduit 510, and the diameter of the fiber column is 0.1-1 mm. The catheter 510 and the built-in fiber column are prepared by direct extrusion, and the production process is simple. The liquid-permeable fiber column 520 can slowly penetrate a small amount of liquid under positive pressure, and the liquid-permeable fiber column 520 can be a fiber column that is permeable by cotton thread or other materials. The seepage device 500 can be inserted into the second input end 320 of the three-way joint 300 as a whole, and does not need to be bonded by glue, and has the characteristics of convenient assembly.

Specifically, the inner wall of the second input end 320 of the three-way joint 300 is provided with a raised ring or a semi-circular ring, the conduit 510 is assembled at the position of the circular ring or a semi-circular ring, and the conduit 510 is connected by the circular ring or a semi-circular ring. 510 is clamped and sealed to the second input end 320 . When assembling, it is only necessary to directly press the seepage device in and squeeze tightly, no need for glue bonding, and the assembling process is simple. It should be noted that the number of circular rings or semi-circular rings can be set to two or other numbers, and two are the best, which can not only achieve the effect of sealing assembly, but also have the characteristics of convenient preparation.

The continuous positive pressure liquid supply device 600 is provided with a push rod 610 , a sleeve 620 and a spring 700 . In this embodiment, the location of the liquid suction end of the continuous liquid supply device sleeve 620 is taken as the relative front, and the direction of the push rod 610 is taken as the relative rear for illustration. The push rod 610 has more than two inner core rods 611 that are socketed and assembled, the latter inner core rod is sleeved on the outside of the former inner core rod, and the outer wall surface of the end of the former inner core rod is provided with an outer convex rib 602, The inner wall surface of the front end of the latter inner core rod is provided with an inner rib 604 , and the inner rib 604 of the latter inner core rod matches the outer rib 602 of the former inner core rod.

A rubber plug 612 is provided at the front end of the foremost inner core rod, and a pull button 613 is connected to the end of the rearmost inner core rod. The pull button 613 has an annular portion 614 , and an internal thread 615 is provided on the inner wall of the annular portion 614 .

The push rod 610 is assembled in the sleeve 620 , the spring 700 is sleeved on the push rod 610 , and the spring 700 is located between the rubber plug 612 and the pull button 613 .

In this embodiment, as shown in FIG. 4 to FIG. 6 , the push rod 610 is provided with two inner core rods 611 . When the push rod 610 is pulled backward, the rear core rod slides backward along the outer wall of the previous core rod. When the outer rib 602 provided on the outer wall of the end of 601 abuts, the outer rib 602 blocks the inner rib 604, and the latter inner core rod 603 will pull the former core rod to move backward as a whole. During the overall backward movement of the front and rear core rods, the liquid suction port provided at the front end of the sleeve 620 starts to suck liquid into the sleeve 620 . When the push rod 610 is pushed forward, the rear core rod 603 first moves along the outer wall surface of the previous core rod 601 toward the front end of the previous core rod 601, and when the front end of the rear core rod 603 abuts against the When the rubber plug 612 is installed at the front end of the previous inner core rod 601 , the two front and rear core rods communicate with the rubber plug 612 and move as a whole towards the liquid suction port of the sleeve 620 to push out the liquid in the sleeve 620 .

In this embodiment, the inner core rod 611 is set in the shape of a circular tube. It should be noted that it can also be set in the shape of a square tube or a rectangular tube. The inner core rod can be set to more than two sections, not limited to two sections in this embodiment.

The sleeve 620 is also provided with a buckle protrusion 621 , the buckle protrusion 621 is fixed on the sleeve 620 , and the annular portion 614 of the pull button 613 is provided with an assembly groove matching the buckle protrusion 621 .

When the pull button 613 is pressed to move the rear core rod forward for a certain distance, and the buckle projection 621 is fixed in the assembly groove, the pull button 613 is fixed to the sleeve 620 .

The continuous positive pressure anti-thrombotic indwelling needle, before infusion, during infusion or when the infusion is stopped, the continuous positive pressure liquid supply device 600 will inhale liquid or inhale liquid in advance. The process of inhaling liquid by the continuous positive pressure liquid supply device 600 is as follows: pull the pull button 613 toward the rear, and the pull button 613 drives the rear core rod to move backward along the outer wall of the previous core rod, and when the inner convex edge of the rear core rod When 604 abuts against the position of the outer rib 602 at the rear end of the previous mandrel, the front and rear two mandrels start to move backward as a whole, and at the same time drive the rubber plug 612 at the front end of the previous mandrel to move backward, and the rubber plug 612 moves backward During the process, the liquid enters the sleeve 620 through the liquid suction port at the front end of the sleeve 620 . When the liquid in the sleeve 620 reaches the requirement, assemble the liquid suction end of the sleeve 620 on the second input end 320 of the tee joint 300, and then push the pull button 613 forward, when the ring portion 614 of the pull button 613 touches When receiving the end of the sleeve 620 , press the pull button 613 to fit the groove with the buckle protrusion 621 , and realize the fixing of the pull button 613 and the sleeve 620 .

At this time, the spring 700 is in a squeezed state between the pull button 613 and the rubber plug 612 , under the action of the restoring force of the spring 700 , the spring 700 will push the rubber plug 612 to move forward, and slowly squeeze out the liquid in the casing. Since the sleeve 620 communicates with the second input end 320 of the three-way joint 300, the second input end 320 is equipped with a slow seepage structure formed by the conduit 510 and the seepage fiber column 520, and the liquid cannot pass through the second input end 320 quickly. . When the whole system achieves dynamic balance, the spring 700 slowly squeezes the liquid to the seepage fiber column 520 under weak restoring force, and the liquid slowly infiltrates through the seepage fiber column 520 and is transported from the output end 330 of the tee joint 300 to the catheter 510. The needle 100 is finally delivered to the blood vessel by the needle 100.

Practice has found that a continuous positive pressure liquid supply device with a capacity of 1 mL can continuously supply liquid for more than 24 hours, and can effectively prevent the formation of thrombus when the intravenous indwelling needle is in the state of stopping the infusion. Moreover, it is not necessary for medical staff to flush the tubes at a certain time interval, which greatly reduces the workload of medical staff and reduces the cost of flushing tubes for patients.

After the continuous positive pressure antithrombotic indwelling needle is punctured and indwelling, it can be used for infusion without a needle or with a needle, and the heparin cap 340 can be disassembled or assembled accordingly. Before, during or after the infusion, the continuous positive pressure liquid supply device 600 is installed on the second input port 320. After the continuous positive pressure liquid supply device 600 is connected, the pull button 613 is pressed in and rotated to lock it tightly. After the continuous positive pressure liquid supply device 600 is connected, it can continuously supply liquid for more than 24 hours and maintain a positive pressure state, so as to truly effectively prevent the formation of thrombus, thereby protecting patients, reducing the workload of nurses, and avoiding the need for repeated flushing trouble.

The continuous positive pressure antithrombotic venous indwelling needle can be covered by a cap on the second input end 320 of the three-way joint 300 when the continuous positive pressure liquid supply device 600 does not need to be assembled.

In addition, the continuous positive pressure antithrombotic venous indwelling needle of this embodiment has the characteristics of simple structure, low cost and safe use.

Example 2.

A continuous positive pressure antithrombotic venous indwelling needle, the other structure is the same as that of embodiment 1, the difference is that: the outer wall surface at the end of the sleeve is provided with an external thread, and the external thread matches the internal thread. When the pull button is pressed to move the rear core rod forward for a certain distance, the pull button is rotated to make the internal thread of the annular part match the external thread of the outer wall surface of the end of the sleeve, and when the buckle protrusion is fixed in the assembly groove, pull Fixation between the button and the sleeve is realized. This fixing method is assembled more stably.

Example 3.

A continuous positive pressure antithrombotic venous indwelling needle, the other structures of which are the same as in Embodiment 1 or 2, except that the aperture of the second input end of the three-way joint is set to a gradually shrinking structure, and the aperture ratio of the outlet end of the second input end is The aperture at the inlet end is 2-5mm smaller. This structural arrangement facilitates the assembly of the liquid seepage device, and during use, the longer the liquid seepage device is used, the more stable it becomes.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that Modifications or equivalent replacements are made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A continuous positive pressure antithrombotic venous indwelling needle, characterized in that: a needle, a needle seat, a three-way joint, an infusion tube, a liquid stop clamp, a seepage device and a continuous positive pressure liquid supply device are provided; The needle is assembled with the needle base, the three-way joint is provided with a first input end, a second input end and an output end, and the output end of the three-way joint is connected with the input end of the needle base. An infusion tube, the liquid stop clamp is assembled on the infusion tube, the seepage device is assembled in the second input end, and the continuous positive pressure liquid supply device is assembled in the second input end of the tee joint . 2. The continuous positive pressure antithrombotic indwelling needle according to claim 1, characterized in that: the seepage device is provided with a catheter and a seepage fiber column assembled in the catheter. 3. The continuous positive pressure antithrombotic indwelling needle according to claim 2, characterized in that: the diameter of the fiber column is 0.1-1 mm. 4. The continuous positive pressure antithrombotic indwelling needle according to claim 3, characterized in that: The continuous positive pressure liquid supply device is provided with a push rod, a sleeve and a spring; The push rod has more than two inner core rods that are socketed and assembled. The latter inner core rod is sleeved on the outside of the previous inner core rod. The inner wall surface of the front end of an inner core rod is provided with an inner convex edge, and the inner convex edge of the latter inner core rod matches the outer convex edge of the previous inner core rod; The front end of the frontmost inner core rod is provided with a rubber plug, and the end of the rearmost inner core rod is connected with a pull button, the pull button has an annular part, and the inner wall surface of the annular part is provided with an internal thread; The push rod is assembled in the sleeve, the spring is sleeved on the push rod, and the spring is located between the rubber plug and the pull button. 5. The continuous positive pressure antithrombotic indwelling needle according to claim 4, characterized in that: the outer wall surface of the end of the sleeve is provided with an external thread, and the external thread matches the internal thread. 6. The continuous positive pressure antithrombotic venous indwelling needle according to claim 4 or 5, characterized in that: the sleeve is also provided with a buckle protrusion, and the buckle protrusion is fixed to the sleeve; The annular part of the pull button is provided with an assembly groove matched with the buckle projection. 7. The continuous positive pressure antithrombotic indwelling needle according to claim 6, characterized in that: the inner core rod is set as a round tube, a square tube or a rectangular tube. 8. The continuous positive pressure antithrombotic indwelling needle according to claim 7, characterized in that: The inner wall of the second input end of the tee joint is provided with a raised ring or semi-circular ring, and the conduit is assembled at the position of the circular ring or semi-circular ring; or The hole diameter of the second input end of the tee joint is set to a structure that gradually decreases, and the hole diameter of the outlet end of the second input end is 2-5mm smaller than the hole diameter of the inlet end. 9. The continuous positive pressure antithrombotic indwelling needle according to claim 7, characterized in that: the needle seat is provided with a grip plate, and the grip plate is fixed to the needle seat. 10. The continuous positive pressure antithrombotic venous indwelling needle according to claim 8, characterized in that: the three-way joint is also provided with a support rib, and the two ends of the support rib are respectively fixed to the first input end and the second input end. Input end; the first input end of the three-way joint is equipped with a heparin cap, and the needle is also provided with a stop groove.