Central vein puncture double-sleeve needle

Abstract

The utility model discloses a central vein puncture double trocar, which relates to the technical field of medical appliances, and comprises a first needle tube, the end part of the first needle tube is provided with a first needle tube head, and the outer side of the first needle tube head is connected with a first mounting head; according to the central vein puncture double-trocar needle, in the vein puncture process, the skin of a patient is punctured through the first needle head, when venous blood is drawn out, the first needle tube is pushed, the end of the first needle head and the end of the second installation head are driven to be positioned through the positioning ring, the second needle tube is drawn back, and the venous blood is extracted out. The sealing piston ring is driven to pump blood into the first needle tube, whether the pumped blood is venous blood or not is judged, if yes, the first needle tube, the second needle tube, the second mounting head and the piston rod are pulled out together, then the guide wire is inserted into the vein blood vessel from the first mounting head along the first needle head, and in the process, the vein blood vessel can be accurately found, so that the vein blood vessel can be accurately extracted. Practicality is high, and repeated puncture injury of a patient is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, and it is central venous puncture double needle. BACKGROUND

[0002] The existing puncture needle needs to use thick needle and thin needle when carrying out intravenous puncture, the thick needle has greater damage to the skin, and cannot guarantee to find the vein blood vessel at one time, and then needs to use the thin needle to puncture the patient first, since the internal thin needle cannot implant the guide wire, needs the thick needle to implant the guide wire, and then needs to pull out the thin needle after finding the vein blood vessel, carries out the secondary puncture of thick needle, since the depth of the first puncture cannot be positioned, the medical staff needs to carry out the secondary puncture to find the vein blood vessel according to the feeling, and then is easy to fail, needs the multiple puncture of thick needle to find the vein blood vessel, and it is time-consuming and laborious, and is easy to cause greater damage to the patient, for this, the utility model provides central venous puncture double needle. CONTENT OF UTILITY MODEL

[0003] In view of the deficiency of prior art, the utility model provides central venous puncture double needle, solves the problem of the above background art.

[0004] In order to realize above-mentioned purpose, the utility model discloses the following technical scheme: central venous puncture double needle, including first needle tube, the end of first needle tube is provided with first needle tube head, and the outside of first needle tube head is connected with first installation head, the inside of first installation head is provided with first needle head, the outside of first needle head is provided with handle, the outside of first needle head is provided with protective sleeve pipe;

[0005] The inside of first needle tube is provided with second needle tube, and the end of second needle tube is provided with second needle tube head, and the outside of second needle tube head is connected with second needle head, the inside of second needle head is provided with second installation head, the inside of second needle tube is provided with piston rod, and the both ends of piston rod are connected with support plate and piston head respectively, and the outside of second needle tube is provided with sealing piston ring;

[0006] The outside of first needle tube and second needle tube is engraved with scale line and positioning ring.

[0007] As a further technical scheme of the utility model, the first needle tube and the first needle tube head are connected and communicated, and the two are integrally formed, the first needle tube head and the first installation head are pull-out and plug-in structures, and the first needle head and the first installation head are connected and communicated.

[0008] As a further technical scheme of the utility model, the second needle tube and the second needle tube head are connected and communicated, and the two are integrally formed, the second needle tube head and the second needle head are pull-out and plug-in structures, and the second needle head and the second installation head are connected and communicated.

[0009] As a further technical scheme of the utility model, the inner ring diameter of the first needle is greater than the outer ring diameter of the second mounting head, and the two are matched, the length of the first needle is less than the length of the second mounting head, the first needle tube, the second needle tube, the first mounting head and the second needle are all plastic materials, and the first needle tube and the second needle tube are both transparent structures.

[0010] As a further technical scheme of the utility model, the handle is fixedly connected with the first needle, and the handle is made of rubber material, the inner ring diameter of the protective sleeve is greater than the outer ring diameter of the first needle, and the two are matched.

[0011] As a further technical scheme of the utility model, the piston rod is fixedly connected with the support plate and the piston head, the support plate is matched with the inside of the second needle tube, the sealing piston ring is fixedly connected with the second needle tube, and the inside of the second needle tube is matched with the first needle tube, and the number of the positioning rings is two groups.

[0012] The utility model provides a central vein puncture double needle, which has the following beneficial effects compared with the prior art:

[0013] The central vein puncture double needle is used in the process of puncturing a vein, the first needle is used to puncture the skin of a patient, the support plate is driven by pulling back the piston rod, when the vein blood is drawn out, the first needle tube is pushed, the first needle tube drives the first needle to move along the outside of the second mounting head until the positioning rings on the outside of the first needle tube and the second needle tube are matched, so that the end of the first needle is positioned with the end of the second mounting head, then the second needle tube is pulled back, the sealing piston ring is pulled back along the inside of the first needle tube, and the blood is drawn into the inside of the first needle tube, and it is judged whether the drawn blood is vein blood, when the blood is vein blood, the first needle tube, the second needle tube, the second mounting head and the piston rod are pulled out, then the guide wire is inserted into the vein blood vessel along the first needle from the first mounting head, in this process, the vein blood vessel can be accurately found, the utility is high, and the patient is prevented from being damaged by multiple punctures. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the central vein puncture double needle.

[0015] Figure 2 It is a local split view of the central vein puncture double needle.

[0016] Figure 3 It is a side view of the central vein puncture double needle.

[0017] Figure 4 It is a side view of the central vein puncture double needle. Figure 3Side view of A-A;

[0018] Figure 5 Double-sheathed needle for central venous puncture Figure 4 Enlarged view of A.

[0019] In the figure: 1, the first needle tube; 2, the first needle; 3, the first mounting head; 4, the handle; 5, the protective sleeve; 6, the second needle tube; 7, the second needle; 8, the second mounting head; 9, the scale line; 10, the positioning ring; 11, the piston rod; 12, the support plate; 13, the piston head; 14, the sealing piston ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] Please refer to Figures 1-5 The utility model provides central venous puncture double-sheathed needle technical scheme: central venous puncture double-sheathed needle, including first needle tube 1, the end of first needle tube 1 is provided with first needle tube head, and the outside of first needle tube head is connected with first mounting head 3, the inside of first mounting head 3 is provided with first needle 2, the outside of first needle 2 is provided with handle 4, the outside of first needle 2 is provided with protective sleeve 5;

[0022] The inside of first needle tube 1 is provided with second needle tube 6, the end of second needle tube 6 is provided with second needle tube head, and the outside of second needle tube head is connected with second needle 7, the inside of second needle 7 is provided with second mounting head 8, the inside of second needle tube 6 is provided with piston rod 11, the both ends of piston rod 11 are connected with support plate 12 and piston head 13 respectively, the outside of second needle tube 6 is provided with sealing piston ring 14, and the outside of first needle tube 1 and second needle tube 6 is engraved with scale line 9 and positioning ring 10.

[0023] As Figures 1-5 Indicated, first needle tube 1 and first needle tube head are connected, and the two are integrally formed, first needle tube head and first mounting head 3 are pull-insert structure, first needle 2 and first mounting head 3 are connected, second needle tube 6 and second needle tube head are connected, and the two are integrally formed, second needle tube head and second needle 7 are pull-insert structure, second needle 7 and second mounting head 8 are connected, so as to facilitate the connection between first needle 2 and first needle tube 1, and also facilitate the connection between second mounting head 8 and second needle tube 6.

[0024] AsFigures 1-5 As shown in the figure, the inner diameter of the first needle 2 is larger than the outer diameter of the second mounting head 8, and they are matched, the length of the first needle 2 is smaller than the length of the second mounting head 8, wherein the length of the first needle 2 is 5.5 cm, the length of the second mounting head 8 is 9 cm, and the second mounting head 8 is exposed 3.5 cm when the first needle 2 is not pushed down, wherein the capacity of the first needle tube 1 and the second needle tube 6 can be customized according to the needs, the first needle tube 1, the second needle tube 6, the first mounting head 3 and the second needle 7 are all made of plastic material, and the first needle tube 1 and the second needle tube 6 are transparent structure, so as to facilitate the sliding of the first needle 2 outside the second mounting head 8, and facilitate the observation of whether the blood drawn is arterial blood or venous blood during the pulling back of the second needle tube 6.

[0025] As shown in the figure, the handle 4 is fixedly connected with the first needle 2, and the handle 4 is made of rubber material, the inner diameter of the protective sleeve 5 is larger than the outer diameter of the first needle 2, and they are matched, so as to facilitate the protection of the first needle 2 and the second mounting head 8 and the hand holding of the first needle 2 after the subsequent guide wire. Figures 1-5 As shown in the figure, the piston rod 11 is fixedly connected with the support plate 12 and the piston head 13, the support plate 12 is matched with the inside of the second needle tube 6, the sealing piston ring 14 is fixedly connected with the second needle tube 6, and the second needle tube 6 is matched with the inside of the first needle tube 1, the number of the positioning ring 10 is two groups, so as to facilitate the positioning of the position of the first needle 2 after the second mounting head 8 punctures.

[0026] Figures 1-5 As shown in the figure, the piston rod 11 is fixedly connected with the support plate 12 and the piston head 13, the support plate 12 is matched with the inside of the second needle tube 6, the sealing piston ring 14 is fixedly connected with the second needle tube 6, and the second needle tube 6 is matched with the inside of the first needle tube 1, the number of the positioning ring 10 is two groups, so as to facilitate the positioning of the position of the first needle 2 after the second mounting head 8 punctures.

[0027] ​The working principle of the utility model is: in the puncture process, the user inserts the second needle head 7 and the second needle tube head between the second mounting head 8 and the second needle tube 6, then inserts the first needle head 2 and the first needle tube 1 between the first mounting head 3 and the first needle tube head, then inserts the second needle tube 6 and the second mounting head 8 into the inside of the first needle tube 1, so that the second mounting head 8 moves along the inside of the first needle head 2, passes through the inside of the first needle head 2, until the second needle tube 6 abuts against the inside of the first needle tube 1, after installation, the patient's skin is punctured through the first needle head 2, when the support plate 12 is pulled back along the inside of the second needle tube 6 by the piston rod 11, it is judged whether the extracted blood is venous blood or arterial blood, when the extracted blood is venous blood, the first needle tube 1 is pushed, so that the first needle tube 1 drives the first needle head 2 to move along the outside of the second mounting head 8, until the positioning ring 10 outside the first needle tube 1 and the second needle tube 6 corresponds, so that the end of the first needle head 2 and the end of the second mounting head 8 are positioned, then the second needle tube 6 is pulled back, and the sealing piston ring 14 is pulled back along the inside of the first needle tube 1, so as to judge whether the extracted blood is venous blood, when the extracted blood is venous blood, the first needle tube 1, the second needle tube 6, the second mounting head 8 and the piston rod 11 are pulled out together, so that the first mounting head 3 and the first needle tube head at one end of the first needle tube 1 are pulled out, then the guide wire is inserted into the venous blood vessel along the first needle head 2 from the first mounting head 3, then the first needle head 2 is pulled out, the double lumen catheter is put along the guide wire, and finally the guide wire is pulled out, in this process, the venous blood vessel can be accurately found without multiple puncture and search, the practicality is improved, and the patient is prevented from being damaged by multiple puncture.

[0028] It should be noted that the double needle set of the case can be used for implantation of double lumen catheter before hemodialysis and use before a variety of venipuncture operations.

[0029] The above is only the preferred embodiment of the utility model, it should be pointed out that for ordinary technical personnel in the prior art, without departing from the principle of the utility model, a number of improvements and refinements can be made, these improvements and refinements should also be regarded as the protection scope of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the art, without special description and limitation.

Claims

1. A central venous puncture double needle set comprising a first needle tube (1), characterized in that, The end of the first needle tube (1) is provided with a first needle tube head, and the outer side of the first needle tube head is connected with a first mounting head (3), the inside of the first mounting head (3) is provided with a first needle head (2), the outer side of the first needle head (2) is provided with a handle (4), and the outer side of the first needle head (2) is provided with a protective sleeve (5); The inside of the first needle tube (1) is provided with a second needle tube (6), the end of the second needle tube (6) is provided with a second needle tube head, and the outer side of the second needle tube head is connected with a second needle head (7), the inside of the second needle head (7) is provided with a second mounting head (8), the inside of the second needle tube (6) is provided with a piston rod (11), both ends of the piston rod (11) are respectively connected with a support plate (12) and a piston head (13), and the outer side of the second needle tube (6) is provided with a sealing piston ring (14). The outer sides of the first needle tube (1) and the second needle tube (6) are engraved with scale lines (9) and positioning rings (10).

2. The central venous puncture double needle set according to claim 1, characterized in that The first needle tube (1) and the first needle tube head are in communication and are integrally formed, the first needle tube head and the first mounting head (3) are in plug-in structure, and the first needle head (2) and the first mounting head (3) are in communication.

3. The central venous puncture double needle set according to claim 1, wherein, The second needle tube (6) and the second needle tube head are in communication and are integrally formed, the second needle tube head and the second needle head (7) are in plug-in structure, and the second needle head (7) and the second mounting head (8) are in communication.

4. The central venous puncture double needle set according to claim 1, wherein, The inner diameter of the first needle head (2) is greater than the outer diameter of the second mounting head (8), and the two are matched, the length of the first needle head (2) is less than the length of the second mounting head (8), the first needle tube (1), the second needle tube (6), the first mounting head (3) and the second needle head (7) are all plastic materials, and the first needle tube (1) and the second needle tube (6) are transparent structures.

5. The central venous puncture double needle set according to claim 1, wherein, The handle (4) and the first needle head (2) are fixedly connected, and the handle (4) is made of rubber, the inner diameter of the protective sleeve (5) is greater than the outer diameter of the first needle head (2), and the two are matched.

6. The central venous puncture double needle set according to claim 1, wherein, The piston rod (11), the support plate (12) and the piston head (13) are fixedly connected, the support plate (12) is matched with the inside of the second needle tube (6), the sealing piston ring (14) is fixedly connected with the second needle tube (6), and the second needle tube (6) is matched with the inside of the first needle tube (1), and the number of the positioning rings (10) is two groups.

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