CN204181960U - A kind of remaining needle - Google Patents

Abstract

The utility model relates to the technical field of medical instruments, in particular to an indwelling needle. Including a puncture assembly (1), a positive pressure infusion connector (2), a vacuum blood collection connector (3), a three-way connector (4), a connecting tube (5) and a stop clip (6), the puncture assembly (1) includes Catheter base (11), catheter (12), puncture needle (13) and puncture-proof sheath (14), described catheter base (11) is a hollow structure, is provided with isolating plug (16) in its upper port, described One end of the catheter adapter (11) is connected to the catheter (12), the other end of the catheter adapter (11) is connected to the stab-resistant sheath (14), and the stab-resistant sheath (14) is axially A sliding groove (141) is provided. The puncture needle assembly, positive pressure infusion joint and vacuum blood collection tube are connected simultaneously through the connecting tube and the three-way joint, and a puncture-proof sheath is provided outside the puncture needle, so that the indwelling needle has the functions of infusion, vacuum blood collection, needle-stick prevention, Anti-backflow function, and simple structure, easy to operate.

Description

an indwelling needle

technical field

The utility model relates to the technical field of medical instruments, in particular to an indwelling needle.

Background technique

At present, clinically, the use of indwelling needles not only reduces the pain caused by repeated puncture of veins, but also reduces the workload of medical workers and facilitates clinical medication. Therefore, indwelling needles are more and more widely used in clinical practice. However, the existing indwelling needles still have some deficiencies in the use process: from the perspective of hospitals and medical care, the existing indwelling needle products have a single function, and cannot simultaneously take into account the functions of infusion, vacuum blood collection, anti-needle stick injury and anti-reflux. When purchasing, it is necessary to refer to functions and various models and specifications, which brings a lot of inconvenience to purchasing and inventory management; when medical workers use different situations to receive indwelling needles with different functions, models and specifications, it also brings a lot of inconvenience to medical workers. Medical workers bring a lot of inconvenience. Moreover, during the vacuum venous blood collection process of the existing indwelling needle, it is necessary to use a syringe to take a blood sample from the infusion connector of the indwelling needle and then inject the blood sample into the vacuum blood collection tube through the puncture needle. During the transfusion, there may be a junction between blood and air, which will affect blood flow. Check the accuracy and the operation is cumbersome.

If the accuracy of the vacuum blood test is high, you need to use a special double-headed vacuum blood collection needle, and the special double-headed vacuum blood collection needle is only for the vacuum blood collection function. When the patient is using the indwelling needle, if you want to achieve vacuum blood collection And to ensure the accuracy of the test, it is necessary to add a special double-headed vacuum blood collection needle to achieve another puncture site, which not only increases the pain of the patient due to multi-site puncture, but also causes unnecessary waste of expenses to the patient due to the additional use of the double-headed vacuum blood collection needle .

Therefore, in view of the above deficiencies, it is necessary to provide an indwelling needle with functions of transfusion, vacuum blood collection, needle-stick prevention and reflux prevention, simple structure and convenient operation.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is to provide an indwelling needle which can simultaneously have the functions of infusion, vacuum blood collection, needle stab wound prevention and backflow prevention, and has a simple structure and convenient operation.

(2) Technical solutions

In order to solve the above technical problems, the utility model provides an indwelling needle, which includes a puncture assembly, a positive pressure infusion joint, a vacuum blood collection joint, a three-way joint, a connecting tube and a flow-stop clamp. The puncture assembly includes a catheter base, a catheter, A puncture needle and a puncture-proof sheath, the catheter base is a hollow structure, an isolation plug is provided in the upper port, one end of the catheter base is connected to the catheter, and the other end of the catheter base is connected to the puncture-proof shield The anti-stab sheath is provided with a sliding groove in the axial direction, the tail of the puncture needle is connected with a handle through a sliding block, and the handle is set on the anti-stab sheath to drive the puncture needle along the The sliding groove slides, and the puncture needle passes through the isolation plug and the catheter adapter in sequence and then protrudes out of the catheter; one end of the connecting pipe communicates with the catheter adapter, and the other end is connected with the first end of the three-way joint. The positive pressure infusion joint and the vacuum blood collection joint are respectively connected with the second end and the third end of the three-way joint.

Preferably, the positive pressure infusion joint includes a housing, an infusion end and an elastic valve, the upper end of the housing is provided with an infusion end, the lower end of the housing is connected to one end of the connecting end, and the inner part of the housing The cavity wall is provided with a diversion groove, the elastic valve is arranged in the housing, and the shape of the elastic valve matches the inner cavity of the housing, and the other end of the connecting end is connected to the tee joint. The second end is connected.

Preferably, the connection end between the infusion end and the infusion set is provided with a Luer inner cone, and the end of the connection end for connecting with the second end of the tee joint is provided with an internal thread and a Luer external cone.

Preferably, the vacuum blood collection joint includes a needle base, a bottle stopper puncture needle and a hemostatic sheath, the bottle stopper puncture needle is fixed at one end of the needle base, and the hemostatic sheath is set on the bottle stopper puncture needle. , the other end of the needle base is connected to the third end of the tee joint.

Preferably, the end of the needle seat for connecting with the third end of the tee joint is provided with an internal thread and a Luer external cone.

Preferably, the anti-stab sheath is provided with a groove, the groove is located at the upper end of the sliding groove, and the width of the groove is greater than the thickness of the sliding block.

Preferably, a catheter sleeve is sheathed on the catheter.

(3) Beneficial effects

The technical solution of the utility model has the following advantages: the indwelling needle is connected to the puncture needle assembly, the positive pressure infusion joint and the vacuum blood collection tube through the connecting tube and the three-way joint, and a stab-proof sheath is provided outside the puncture needle, so that the The indwelling needle has the functions of transfusion, vacuum blood collection, needle-stick prevention and reflux prevention, and has a simple structure and convenient operation.

Description of drawings

Fig. 1 is the structural representation of indwelling needle of the present utility model;

Fig. 2 is a sectional view of the positive pressure infusion joint of the present invention;

Fig. 3 is a sectional view of the vacuum blood collection joint of the present invention.

In the figure: 1: puncture assembly; 11: catheter seat; 12: catheter; 13: puncture needle; 131: needle handle; 14: puncture-resistant sheath; 141: sliding groove; 142: groove; : isolation plug; 2: positive pressure infusion connector; 21: housing; 211: diversion groove; 22: elastic valve; 23: infusion end; 24: connection end; 3: vacuum blood collection connector; 31: needle seat; 32 : Cork puncture needle; 33: Hemostatic sheath; 4: Tee joint; 5: Connecting tube; 6: Stop clip.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention. Novel and simplified descriptions do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the utility model.

In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

As shown in Figure 1, the indwelling needle provided by the embodiment of the utility model mainly includes a puncture assembly 1, a positive pressure infusion joint 2, a vacuum blood collection joint 3, a three-way joint 4, a connecting tube 5 and a stop clip 6, wherein the puncture Assembly 1 mainly includes catheter adapter 11, catheter 12, catheter sheath 15, puncture needle 13 and puncture-proof sheath 14. The port is provided with an isolation plug 16, and one end of the catheter base 11 is connected with the catheter 12, and the other end of the catheter base 11 is connected with the anti-stab sheath 14, and the anti-stab sheath 14 is provided with a sliding groove 141 in the axial direction, and the puncture needle 12 is in the In the inside of the anti-stab sheath 14, the afterbody of the puncture needle 13 is connected with the needle handle 131 by a sliding block (not shown), the sliding block cooperates with the sliding groove 141 and passes through the sliding groove 141, and one end of the sliding block is connected with the puncture block. The tail of the needle 13 is sleeved on the needle handle 131 on the anti-stab sheath 14 and connected. When the puncture needle 13 needs to be moved, the needle handle 131 can be held by the hand to drive the puncture needle 13 to slide up and down along the sliding groove 141, and the puncture needle 13 is sequentially pierced along the axial direction. After passing through the isolation plug 16 and the catheter base 11, the catheter 12 is extended. One end of the connecting pipe 5 communicates with the catheter base 11, and the other end is connected with the first end of the three-way joint 3, while the positive pressure infusion joint 2 and the vacuum blood sampling joint 3 are respectively connected with the second end and the third end of the three-way joint 4. The connecting pipe 5 is also provided with a stop clamp 6 for controlling the flow of the liquid medicine.

As shown in Figure 1 and Figure 2, the positive pressure infusion joint 2 mainly includes a housing 21, an infusion end 23 and an elastic valve 22, the elastic valve 22 is arranged inside the housing 21, and the upper end of the housing 21 is provided with an infusion end 23 , used to connect with the infusion apparatus; the lower end of the housing 21 is provided with a connecting end 24, the elastic valve 22 is a hollow structure, the upper end matches the size and shape of the infusion end 23, and the lower end is welded and fixed on the connecting end 24, The shape of the lower end matches the shape of the inner cavity of the housing 21. In the natural state, the upper end of the elastic valve 22 is closely matched with the infusion port 23, and the lower end matches the shape of the inner cavity of the housing 21, and there is a certain gap; in the infusion state, The connector of the infusion set is inserted into the infusion port 23, and the upper end of the elastic valve 22 is squeezed from the infusion port 23 to the inner cavity of the housing 21, so that the medicinal liquid enters the positive pressure infusion connector 2 and passes through the inner wall of the housing 21. The diversion groove 211 on the top flows into the infusion line composed of the three-way joint 4 connected to the positive pressure infusion joint 2, the connecting pipe 5, the catheter base 11, and the catheter 12. In order to make the connection between the positive pressure infusion joint 2 and the infusion set more convenient , better firmness, tightness and applicability. Preferably, the connecting end of the infusion end 23 and the infusion set is provided with an external thread, and the port of the connection end of the infusion end 23 and the infusion set is provided with a luer for the infusion set. The adapter connects to a matching Luer inner cone.

In order to facilitate the connection and replacement of the positive pressure infusion connector 2, and to make the connection between the positive pressure infusion connector 2 and the three-way connector 4 more firm, preferably, as shown in Figure 2, the connecting end 24 is used to connect with the second end of the three-way connector The end of the tee is provided with an internal thread and a Luer external cone, and the second end of the tee joint 4 connected to the connecting end 24 is correspondingly provided with an external thread and a Luer internal cone.

As shown in Figures 1 and 3, the vacuum blood sampling connector 3 mainly includes a needle base 31, a bottle stopper puncture needle 32 and a hemostatic sheath 33, the bottle stopper puncture needle 32 is fixed on one end of the needle holder 31, and the hemostatic sheath 33 is set on On the cork puncture needle 32, the other end of the needle seat is connected with the third end of the tee joint 4.

In order to facilitate the connection and replacement of the vacuum blood collection joint 3, and to make the connection between the vacuum blood collection joint 3 and the three-way joint more firm, preferably, as shown in Figure 3, the needle seat 31 is used for the end connected to the third end of the three-way joint An internal thread and a Luer external cone are provided, and an external thread and a Luer internal cone are provided corresponding to the third end of the tee joint 4 connected to the needle seat 31 .

The puncture needle 13 is pulled out after the catheter 12 is introduced into the vein of the human body, and the needle handle 131 is slid along the tail of the puncture-proof sheath 14 to drive the puncture needle 13 so that it is completely surrounded by the puncture-proof sheath 14 to protect medical personnel To avoid being stabbed by the puncture needle 13, in order to prevent the puncture needle 13 from loosening after retracting into the puncture-resistant sheath 14, preferably, as shown in Figure 1, on the puncture-resistant sheath 14, it is located above the sliding groove 141 A groove 142 is set, and the groove 142 runs through the wall of the anti-stab sheath 14, so that the top of the sliding groove 141 is disconnected from the wall of the anti-stab sheath 14, and the width of the groove 142 will be greater than the thickness of the sliding block, When the sliding block moves to the top along the sliding groove, the sliding block slides out of the sliding groove 141 and loses the clamping force of the sliding groove 141 on the sliding block, and after the sliding block slides out of the sliding groove 141, the sliding groove 141 rebounds and closes, Prevent the sliding block from entering the sliding groove 141 again, thereby defining the position of the puncture needle 13, so that the puncture needle 13 will not slip out of the catheter and injure the medical personnel.

In order to prevent the catheter 12 from being polluted, preferably, as shown in FIG. 1 , a catheter sheath 15 is sheathed on the catheter 12 . When in use, the catheter sheath 15 can be directly pulled out to be used directly.

During use, first remove the catheter cover 15, the puncture needle of the puncture needle 13 is located in the catheter 12, and the puncture needle of the puncture needle 12 is exposed to the catheter 12, and the puncture needle 13 is used for venipuncture, and the puncture needle 13 brings the catheter 12 into the vein at the same time, Then the puncture needle 13 is pulled out, and the catheter 12 is left in the vein.

When pulling out the puncture needle 13, hold the needle handle 131 to move the puncture needle 13 along the sliding groove 141, completely retract the puncture needle 13 into the anti-puncture sheath 14, and prevent the puncture needle 13 from stabbing the medical staff.

During infusion, the infusion set is connected with the positive pressure infusion joint 2, and forms a closed infusion channel with the three-way joint 4, the connecting pipe 5, the catheter base 11 and the catheter 12.

After the infusion set is removed, the positive pressure infusion connector 2 forms a positive pressure, which pushes the medicinal solution in the infusion channel forward and prevents the blood in the vein from flowing backward.

When taking blood, the bottle stopper puncture needle 32 is inserted into the vacuum blood collection tube to complete the blood collection.

In summary, the indwelling needle of this embodiment is connected to the puncture needle assembly, the positive pressure infusion joint and the vacuum blood collection tube through the connecting tube and the three-way joint at the same time, and a puncture-proof sheath is provided outside the puncture needle, so that the indwelling needle At the same time, it has the functions of infusion, vacuum blood collection, needle stick prevention and backflow prevention, and has simple structure and convenient operation.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (7)

1. An indwelling needle, characterized in that: comprising a puncture assembly (1), a positive pressure infusion connector (2), a vacuum blood collection connector (3), a three-way connector (4), a connecting tube (5) and a stop clip ( 6), the puncture assembly (1) includes a catheter adapter (11), a catheter (12), a puncture needle (13) and a puncture-proof sheath (14), and the catheter adapter (11) is a hollow structure with an upper port An isolation plug (16) is provided inside, one end of the catheter adapter (11) is connected to the catheter (12), and the other end of the catheter adapter (11) is connected to the stab-proof sheath (14), so The anti-stab sheath (14) is provided with a sliding groove (141) along the axial direction, and the tail of the puncture needle (13) is connected with a needle handle (131) through a sliding block, and the needle handle (131) is sleeved on the The puncture-resistant sheath (14) can drive the puncture needle (13) to slide along the sliding groove (141), and the puncture needle (13) passes through the isolation plug (16) and the catheter base (11) successively and stretches out the catheter ( 12) outside; one end of the connecting pipe (5) communicates with the catheter adapter (11), and the other end is connected with the first end of the three-way joint (4), the positive pressure infusion joint (2) and the vacuum The blood collection joint (3) is respectively connected with the second end and the third end of the three-way joint (4). 2. The indwelling needle according to claim 1, characterized in that: the positive pressure infusion connector (2) comprises a housing (21), an infusion end (23) and an elastic valve (22), the housing ( 21) is provided with an infusion end (23), the lower end of the housing (21) is connected to one end of the connection end (24), and the inner cavity wall of the housing (21) is provided with a diversion groove (211 ), the elastic live valve (22) is arranged in the housing (21), and the shape of the elastic live valve (22) matches the inner cavity of the housing (21), and the connection end (24 ) is connected with the second end of the tee joint (4). 3. The indwelling needle according to claim 2, characterized in that: the connection end between the infusion end (23) and the infusion set is provided with a Luer inner cone, and the connection end (24) is used for connecting with a three-way joint (4) The end connected to the second end is provided with an internal thread and a luer external cone. 4. The indwelling needle according to claim 1, characterized in that: the vacuum blood collection connector (3) comprises a needle seat (31), a bottle stopper puncture needle (32) and a hemostatic sheath (33), and the bottle stopper The puncture needle (32) is fixed on one end of the needle base (31), the hemostatic sheath (33) is sleeved on the bottle stopper puncture needle (32), and the other end of the needle base (32) is connected to the The third end of the three-way joint (4) is connected. 5. The indwelling needle according to claim 4, characterized in that: the end of the needle holder (31) for connecting with the third end of the tee joint 4 is provided with an internal thread and a Luer external cone. 6. The indwelling needle according to claim 1, characterized in that: the stab-proof sheath (14) is provided with a groove (142), and the groove (142) is located at the upper end of the sliding groove (141) , and the width of the groove (142) is greater than the thickness of the sliding block. 7. The indwelling needle according to claim 1, characterized in that: a catheter sleeve (15) is sheathed on the catheter (12).