CN218501085U - Porous venous indwelling needle - Google Patents

Abstract

The utility model relates to the technical field of indwelling needles, in particular to porous venous indwelling needles, comprising an outer sleeve, a puncture needle seat, an extension tube and a sealing head, the outer sleeve is fixed on the puncture needle seat, and one end of the extension tube It communicates with the outer sleeve, and the sealing head is connected with the other end of the extension tube. The extension tube is provided with a hemostatic clip, and the outer sleeve is provided with a needle core that can be pulled out. The side of the needle core A number of flow holes are distributed on the wall; the utility model is used to solve the problem that the existing porous venous indwelling needle needs to be pulled out to judge whether the blood vessel is punctured successfully, which in turn makes the puncture difficult and slow, and wastes medical resources. The new type reduces the requirements for the puncture technology of medical staff for porous vein indwelling, improves the success rate of puncture, reduces the consumption of medical resources, reduces the physical and mental burden of patients, and improves the puncture efficiency.

Description

Porous venous catheter

technical field

The utility model relates to the technical field of indwelling needles, in particular to porous vein indwelling needles.

Background technique

The porous venous indwelling needle is composed of a stainless steel needle core, a soft outer sleeve and a plastic needle seat. When puncturing, the outer sleeve and the needle core are inserted into the blood vessel together, and the needle core is pulled out, leaving only the soft outer sleeve in the blood vessel for infusion. . In clinical treatment and rescue, patients need to be infused for a long time. The use of porous venous indwelling needles can not only reduce the number of venipunctures for patients, reduce the pain of patients and the fear of injections, relieve the anxiety of family members, but also It can reduce the workload of nurses, facilitate clinical medication, and rescue of critically ill patients.

However, for the existing clinically used porous venous indwelling needles, when the medical personnel are puncturing, they can only pull out the needle core and try to judge whether the puncture is successful with saline. Indwelling veins are used to re-puncture other parts of the skin, which not only has a low puncture success rate, but also consumes more working time for medical staff, reduces work efficiency, and consumes more medical resources, increasing the physical and mental burden of patients.

Utility model content

In order to overcome the defects in the above-mentioned prior art, the utility model provides a porous venous indwelling needle, which can effectively judge whether the blood vessel is punctured successfully before the needle core is pulled out, reduces the difficulty of puncture, improves the success rate of puncture and the work efficiency of medical staff, At the same time, it can effectively reduce the consumption of medical resources and reduce the physical and mental burden of patients.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: the porous venous indwelling needle includes an outer sleeve, a puncture needle seat, an extension tube, and a sealing head, the outer sleeve is fixed on the puncture needle seat, and the One end of the extension tube communicates with the outer tube, the sealing head is connected with the other end of the extension tube, a hemostatic clip is arranged on the extension tube, a pull-out needle core is arranged inside the outer tube, and the A number of flow holes are distributed on the side wall of the needle core.

Further, the circulation holes are arranged equidistantly along the axial direction of the needle core.

Further, the flow holes are arranged in multiple rows, and the flow holes in two adjacent rows are arranged in a staggered manner.

Further, the flow hole is a round hole.

Further, the diameter of the flow hole is 1/3-1 times the diameter of the needle core.

Further, the flow holes are oval holes.

Further, the width of the flow hole is 1/4-1/2 times the diameter of the needle core.

Further, the length of the flow hole is 1/5-4/5 times the length of the core.

Further, the sealing head is a Y-type heparin cap.

Further, a detachable dust jacket is provided on the outer sleeve.

Compared with the prior art, the beneficial effects of the utility model are as follows:

The utility model provides a porous venous indwelling needle, comprising an outer sleeve, a puncture needle seat, an extension tube, and a sealing head, the outer sleeve is fixed on the puncture needle seat, and one end of the extension tube communicates with the outer sleeve , the sealing head is connected to the other end of the extension tube, the extension tube is provided with a hemostatic clip, the outer sleeve is provided with a detachable needle core, and a number of flow holes are distributed on the side wall of the needle core ;

When puncturing the patient, tie a tourniquet ten centimeters above the pre-puncture point, and disinfect the puncture site. The patient half-clenches his fist, exhausts the porous venous indwelling needle, and inserts the needle core into the puncture site at an angle of 15° to 30° , after seeing the return of blood, continue to insert the needle for a certain distance, and try to push the saline. Since there are a number of flow holes on the needle core, the saline enters the puncture site from the needle holes and flow holes on the needle core, which increases the flow rate and flow of the saline. Sensing the resistance of the saline push, adjust the puncture angle and distance of the needle core, and at the same time observe whether the puncture site is abnormal, and judge whether the puncture is successful; after the puncture is successful, withdraw a part of the needle core, send the outer tube into the blood vessel, open the hemostatic clip, The patient loosens his fist and pulls out the needle core completely;

The utility model is provided with several flow holes on the needle core. When the needle core punctures into the blood vessel, the blood can not only flow back into the outer sleeve through the original needle core pinhole, but also flow back into the outer sleeve through the increased flow holes. On the one hand, the increased flow holes increase the number of blood return channels, making the blood return faster; Obvious backflow observation, both of these two aspects are conducive to timely adjustment of needle insertion distance and needle insertion speed;

When the medical patient further tries to push the saline, the saline flows into the puncture site from the needle hole and the flow hole at the same time. On the one hand, the increased flow hole increases the flow of saline into the puncture site, which is convenient to observe whether the puncture site is abnormal, and then adjust the needle insertion Angle and distance. On the other hand, the increased flow holes are conducive to the medical staff to perceive the resistance of saline test push. When the saline enters the vein from the needle hole and several flow holes, the test push resistance is small, and the puncture is successful. And, compared with For superficial vein puncture and deep vein puncture, the change of test push resistance is more obvious. When saline enters deep vein, if the test push resistance is large, the puncture will fail, and the puncture of the needle core needs to be further adjusted. Angle and distance, if the test push resistance is small and the test push is very smooth, the puncture is successful, which further increases the success rate of deep venous puncture;

Therefore, by adding a flow hole on the needle core, the medical personnel have the opportunity to adjust the needle core puncture angle and puncture distance during the puncture blood return stage and the saline test push stage, which reduces the difficulty of puncture, increases the fault tolerance rate, and realizes the needle core pull out. Judging whether the blood vessel is punctured successfully before exiting, improves the success rate of puncture and the work efficiency of medical staff, effectively reduces the consumption of medical resources, and reduces the physical and mental burden of patients.

Description of drawings

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

Reference signs: 1-overtube; 2-puncture needle seat; 3-extension tube; 4-sealing head; 5-hemostatic clip; 6-needle core; 7-flow hole; 8-pinhole; .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. The utility model is described in one of the embodiments below in conjunction with specific embodiments. Wherein, the accompanying drawings are only for illustrative purposes, and what are shown are only schematic diagrams, rather than physical drawings, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present utility model, some parts of the accompanying drawings will be omitted , enlargement or reduction, does not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings may be omitted.

Example

As shown in Figure 1, the porous venous indwelling needle comprises an outer sleeve 1, a puncture needle base 2, an extension tube 3, and a sealing head 4, the outer sleeve 1 is fixed on the puncture needle base 2, and one end of the extension tube 3 is connected to the outer sleeve 1 Connected, the sealing head 4 is connected with the other end of the extension tube 3, the extension tube 3 is provided with a hemostatic clip 5, and the outer sleeve 1 is provided with a detachable needle core 6, and a number of circulation holes 7 are distributed on the side wall of the needle core 6 .

The utility model is provided with a number of circulation holes 7 on the needle core 6. When the needle core 6 is pierced into the blood vessel, the blood can not only flow back into the outer sleeve 1 through the original needle core 6 pinhole 8, but also through the increased The flow holes 7 flow back into the outer sleeve 1. On the one hand, the increased flow holes 7 increase the number of blood return channels, making the blood return faster. On the other hand, the increased flow holes 7 increase the size of the outer sleeve 1 and the needle core 6 The gap between them makes the blood volume in the outer cannula 1 larger, and the observation of blood backflow is obvious, which is conducive to timely adjustment of the needle insertion distance and needle insertion speed;

When the medical patient further tries to push the saline, the saline flows into the puncture site from the needle hole 8 and the flow hole 7 of the needle core 6 at the same time. Then adjust the angle and distance of needle insertion. On the other hand, the increased flow hole 7 is beneficial for medical staff to perceive the resistance of saline push. , compared with superficial venous puncture, the change in push resistance is more obvious when deep venous puncture is performed. When saline enters deep venous blood, if the push resistance is greater, the puncture will fail, and the needle needs to be further adjusted. For the puncture angle and distance of the core 8, if the test push resistance is small and the test push is very smooth, the puncture is successful, which further increases the success rate of deep venous blood vessel puncture;

Therefore, by adding a flow hole 7 to the needle core 6, medical personnel have the opportunity to adjust the puncture angle and puncture distance of the needle core 6 during the puncture blood return stage and the saline test push stage, which reduces the puncture difficulty and increases the fault tolerance rate. Before the needle core 6 is pulled out, it is judged whether the blood vessel is punctured successfully, which improves the puncture success rate and the work efficiency of the medical staff, and at the same time effectively reduces the consumption of medical resources and the physical and mental burden of the patient. On the core 6, when the medical personnel use the needle core 6 to puncture and slowly insert the needle, they can judge the depth of the needle core 6 punctured into the skin by observing the number of the circulation holes 7 exposed outside the skin, so as to adjust the needle depth and improve the puncture success Rate.

In one embodiment, as shown in FIG. 1 , the flow holes 7 are equidistantly arranged along the axial direction of the needle core 6 .

It should be noted that in this embodiment, the flow holes 7 are preferably arranged in a misplaced arrangement to meet the strength requirements of the needle core 6. The flow holes 7 arranged in a misplaced manner can increase the blood return speed and facilitate the medical staff to feel the saline test in time. The size of the push resistance can improve the success rate of puncture.

In one embodiment, as shown in FIG. 1 , the flow hole 7 is a round hole.

It should be noted that when the circulation hole 7 is a circular hole, the transition of the edge is smooth and it is not easy to be blocked, and under the same size condition, the circular hole has a larger area and a larger liquid flow rate, which is more conducive to observing blood return and judging the saline test. push resistance.

In one embodiment, the diameter of the flow hole 7 is 1/3-1 times the diameter of the needle core 6 .

It should be noted that when the diameter of the flow hole 7 is one-third of the diameter of the needle core 6, the flow hole 7 can be arrayed with a maximum of 9 flow holes 7 on the circumference of the needle core 6. When the diameter of the flow hole 7 is 1/3 of the needle core 6 When the diameter is 1/2 of the diameter, the flow holes 7 can be arrayed at most 6 flow holes 7 on the circumference of the needle core 6. When the diameter of the flow holes 7 is three-quarters of the diameter of the needle core 6, the flow holes 7 are in A maximum of three flow holes 7 can be arrayed on the circumference of the needle core 6 . When the diameter of the flow hole 7 is equal to the diameter of the needle core 6 , a maximum of two flow holes 7 can be arrayed on the circumference of the needle core 6 .

In one of the embodiments, the flow hole 7 is an oval hole.

It should be noted that the flow hole 7 can also be designed as an elliptical hole, and one of the operation methods is to connect two adjacent round holes to form an elliptical hole, which can further reduce the area of the needle core 6, so that the needle core 6 When the puncture strength is satisfied, the gap between the needle core 6 and the outer cannula 1 is larger. On the one hand, the blood return speed is increased to facilitate the observation of blood return. On the other hand, it is convenient to judge the resistance of the saline push test in time, thereby improving the puncture success rate .

In one embodiment, the width of the flow hole 7 is 1/4-1/2 times the diameter of the needle core 6 .

It should be noted that when the width of the flow hole 7 is a quarter of the diameter of the needle core 6, the flow hole 7 can be arrayed with a maximum of 12 flow holes 7 on the circumference of the needle core 6. Compared with the circular hole, the number of setting more, and longer.

In one embodiment, the length of the flow hole 7 is 1/5-4/5 times the length of the needle core 6 .

It should be noted that the flow holes 7 are elliptical holes. When the length of the flow holes 7 is one-fifth of the length of the needle core 6, there are at most 4 flow holes 7 arranged in the axial direction of the needle core 6. When the length of the flow hole 7 is four-fifths of the length of the needle core 6, at most one flow hole 7 is arranged in the axial direction of the needle core 6, wherein, when only one flow hole 7 is arranged, The flow hole 7 can be approximately covered on the needle core 6, that is, the length of the flow hole 7 can be close to the length of the needle core 6, so as to increase the gap between the needle core 6 and the outer sleeve 1, increase the blood return speed, and facilitate timely Judging the resistance of saline push test, so as to improve the success rate of puncture.

In one of the embodiments, the outer casing 1 is provided with a detachable dust cover 9 .

It should be noted that, on the one hand, the dustproof cover 9 is used to prevent dust from entering the outer sleeve 1 and the needle core 6 and contaminating the porous venous indwelling needle; on the other hand, it is used to cover the needle core 6 to prevent accidental scratches and needle core Core 6 and infected patients or medical staff.

In one embodiment, as shown in FIG. 1 , the sealing head 4 is a Y-type heparin cap.

It should be noted that the Y-type heparin cap can be repeatedly punctured for infusion and injection of drugs for patients. Injecting heparin sodium into the heparin cap can prevent blood reflux and anticoagulation, and at the same time prolong the service life of the porous venous catheter.

In one of the embodiments, the diameter and size of the extension tube 3 can be adjusted according to different types of intravenous indwelling needles, so as to facilitate infusion and achieve better use.

Further, the venous indwelling needles of the present invention can be used in models of 16-24, and the venous indwelling needles of models 16 and 17 can be used for hemodialysis puncture.

working principle:

When puncturing the patient, tie a tourniquet ten centimeters above the pre-puncture point, and disinfect the puncture site. The patient half-clenches his fist, exhausts the porous venous indwelling needle, and inserts the needle core 6 into the puncture at an angle of 15° to 30°. After seeing the return of blood, continue to insert the needle for a certain distance. Since the return blood can flow into the outer sleeve 1 from the needle hole 8 and the flow hole 7 at the same time, the flow rate of the return blood is accelerated, and it is convenient for the medical staff to adjust the angle and distance of the needle in time, and then try to push the saline , the saline enters the puncture site from the needle hole 8 and the flow hole 7 on the needle core 6, which increases the flow rate and flow rate of the saline. The medical staff adjusts the puncture angle and puncture distance of the needle core 6 by sensing the resistance of the saline test push, and observes at the same time Whether the puncture site is abnormal, judge whether the puncture is successful; at the same time, during the puncture process, the flow hole 7 on the needle core 6 can play the role of a scale, by observing the number of flow holes 7 exposed outside the skin, judge the puncture of the needle core 6 The entry distance is conducive to adjusting the puncture depth and puncture distance in time, and further improves the success rate of puncture; after the puncture is successful, part of the needle core 6 is withdrawn, the overtube 1 is sent into the blood vessel, the hemostatic clip 5 is opened, the patient loosens his fist, and the needle core 6 Pull out completely.

In the description of the present utility model, it should be understood that if the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or positional relationship shown in the drawings, It is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the terms describing the positional relationship in the drawings are only for example It should not be construed as a limitation on this patent, and those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations. In addition, the meaning of "and/or" appearing in the whole text includes three parallel schemes, taking "A and/or B" as an example, including scheme A, scheme B, or schemes that both A and B satisfy.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model, or directly/indirectly applied in other relevant technical fields shall be included in the protection scope of the claims of the utility model.

Claims (10)

1. The porous venous indwelling needle comprises an outer sleeve, a puncture needle seat, an extension tube and a sealing head, wherein the outer sleeve is fixed on the puncture needle seat, one end of the extension tube is communicated with the outer sleeve, the sealing head is connected with the other end of the extension tube, and a hemostatic clamp is arranged on the extension tube.

2. The porous venous indwelling needle of claim 1, wherein the flow holes are arranged equidistantly along the axial direction of the core.

3. The porous venous indwelling needle of claim 2, wherein the flow holes are staggered along the axial direction of the core.

4. The porous venous retention needle as defined in claim 3, wherein the flow holes are round holes.

5. The porous venous retention needle as in claim 4, wherein the diameter of the flow holes is 1/3-1 times the diameter of the core.

6. The porous venous retention needle of claim 1, wherein the flow holes are elliptical holes.

7. The porous venous retention needle as defined in claim 6, wherein the width of the flow holes is 1/4-1/2 times the diameter of the core.

8. The porous venous retention needle as defined in claim 7, wherein the length of the flow holes is 1/5-4/5 times the length of the core.

9. The porous venous retention needle of any of claims 1-8, wherein the sealing head is a Y-shaped heparin cap.

10. The porous venous indwelling needle of claim 9, wherein the outer cannula is provided with a removable dust cover.

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