Artery blood taking needle

Abstract

The artery blood taking needle comprises a needle cylinder and a needle stem, a telescopic piston rod is arranged at the tail end of the needle cylinder, a nipple is arranged at the head end of the needle cylinder, an existing positive pressure connector is adopted for the nipple, a through opening is formed in the end face of the nipple, a rubber core is arranged in the through opening, and the rubber core can elastically deform. A pintle is arranged at the tail end of the needle stem, a tube core is arranged in the pintle, the outer diameter of the tube core is smaller than the inner diameter of the through opening, and the inner circumferential surface of the pintle is in threaded connection with the outer circumferential surface of the nipple: when the pintle is connected with the nipple, the tube core pushes and presses the rubber core and moves into the through opening, and the rubber core is compressed and opens the through opening, so that the inner cavity of the needle stem is communicated with the inner cavity of the needle cylinder; when the pintle is separated from the nipple, the tube core loosens the rubber core and moves out of the through opening, and the rubber core resets and seals the through opening. According to the artery blood taking needle, through the nipple positive pressure connector, the nipple through opening can be opened when the pintle is screwed, the nipple through opening can be closed when the pintle is screwed, liquid in the needle cylinder is prevented from leaking from the nipple through opening, and operation is easy and convenient.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an arterial blood collection needle. Background Technology

[0002] During arterial blood collection, medical staff first insert a lancet into the patient's artery to collect blood. Then, the lancet with the collected blood is inserted into the rubber seal. Holding the needle with one hand and the syringe with the other, the lancet is separated from the syringe. The rubber seal protects against needlestick injuries. Finally, the cap is placed on the syringe tip to seal and preserve the blood inside. The lancet, rubber seal, and cap can be referenced from existing arterial blood sample collectors (manufactured by Jinan Tianhou Medical Equipment Co., Ltd., Huaiyin Branch).

[0003] The shortcomings of the above-mentioned technologies are as follows:

[0004] The existing syringe nipple opening is open. In order to prevent blood from leaking out of the syringe from the nipple, medical staff need to place the syringe tip upwards, then unscrew the nipple and remove the needle. The blood in the syringe is connected to the outside through the nipple opening and cannot automatically close the nipple opening.

[0005] The existing syringe and cap are separate, which makes it easy for the cap to fall out of your hand and become contaminated upon landing, posing a risk of blood sample contamination. Utility Model Content

[0006] The purpose of this invention is to provide an arterial blood collection needle that, through a positive pressure connector at the nipple, opens the nipple opening when the plug is tightened and closes the nipple opening when the plug is loosened, thus preventing leakage of liquid from the nipple opening in the syringe. The operation is simple.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0008] An arterial blood collection needle includes a syringe barrel and a needle shaft. The syringe barrel has a retractable piston rod at its tail end and a nipple at its tip. The nipple uses a conventional positive pressure connector, meaning the nipple end face has a port with a rubber core inside the port, which can elastically deform. The needle shaft has a plug at its tail end, containing a tube with an outer diameter smaller than the inner diameter of the port. The inner circumferential surface of the plug is threaded to the outer circumferential surface of the nipple. When the plug is engaged with the nipple, the tube pushes the rubber core and moves into the port, compressing the rubber core and opening the port, connecting the inner cavity of the needle shaft with the inner cavity of the syringe barrel. When the plug separates from the nipple, the tube releases the rubber core and moves out of the port, the rubber core resets, and closes the port.

[0009] Compared with existing technologies, the arterial blood collection needle using the above-mentioned technical solution has the following beneficial effects:

[0010] Using the arterial blood collection needle of the present invention, before blood collection, medical staff attach the needle stem to the syringe nipple, and when tightening the needle plug, the core pushes the rubber core to open the port, allowing blood to be drawn into the syringe through the needle stem; after blood collection, medical staff remove the needle stem from the syringe nipple, and when loosening the needle plug, the rubber core returns to its original position, sealing the port and preventing liquid in the syringe from leaking from the nipple port.

[0011] In the preferred embodiment, the cap is held in place by the strap, thus securing the cap to the syringe and preventing it from falling from the hand. This prevents the cap from falling to the ground and becoming contaminated, reducing the risk of blood sample contamination.

[0012] Preferably, the sample also includes a cap and a strap. The two ends of the strap are fixed to the outer circumferential surface of the cap and the outer circumferential surface of the syringe tip, respectively. The cap has a cap groove, and the inner circumferential surface of the cap groove is threadedly connected to the outer circumferential surface of the nipple. The cap covers the nipple, protecting it and preventing the syringe plunger from being accidentally pushed open and causing blood leakage. It also keeps the nipple tip clean, reducing the risk of blood sample contamination.

[0013] Preferably, it also includes a rubber seal, the bottom of which is detachably connected to the top of the cap. The rubber seal is removed after blood drawing and discarded along with the needle shaft. The rubber seal is mounted on the cap, making it less likely to be lost and easy to access.

[0014] Preferably, the cover has a groove on its surface, and the rubber seal has a locking block underneath that fits into the groove. The locking block snaps into the groove. Medical staff can remove the rubber seal from the cover simply by pulling the cover apart.

[0015] Preferably, the device also includes a fixing clip, comprising clip A and clip B, both of which are C-shaped. The outer diameter of the syringe is slightly larger than the opening diameter of clip A, and the syringe is clamped within the clamping opening of clip A. The outer diameter of the cap is slightly larger than the opening diameter of clip B, and the cap is clamped within the clamping opening of clip B. By fixing clips A and B respectively, the cap and syringe are relatively fixed, preventing the cap from shaking freely.

[0016] Preferably, a groove is provided on the upper edge of the outer circumferential surface of the cover. The clamping end of the B clamp engages with the groove, and the outer diameter of the rubber seal is larger than the outer diameter of the groove, thus confining the B clamp within the groove. The groove fixes the position of the B clamp on the cover, preventing accidental displacement of the B clamp and its detachment from the cover.

[0017] Preferably, a grip is provided between clamp A and clamp B, and the length of the grip is greater than the width of a finger. The grip extends the distance between clamp A and clamp B, allowing medical staff to grip firmly and easily remove the fixing clip from the syringe.

[0018] Preferably, the nipple cover is equipped with an absorbent sponge on its surface. The sponge is soaked in disinfectant, and after the cover is closed, the sponge fits tightly against the nipple end. After blood collection, medical staff can use an existing dropper to drip disinfectant into the absorbent sponge, and then close the cover to the nipple, allowing the disinfectant in the sponge to disinfect the nipple and reduce the risk of blood sample contamination. Attached Figure Description

[0019] Figure 1 This is a front view of the arterial blood collection needle before blood collection in the embodiment.

[0020] Figure 2 This is a front view of the arterial blood collection needle after blood collection in the embodiment.

[0021] Figure 3 This is a schematic diagram of the arterial blood collection needle before blood collection in the embodiment.

[0022] Figure 4 This is a schematic diagram of the structure when the needle pierces the rubber seal in the embodiment.

[0023] Figure 5 This is a schematic diagram of the structure when the rubber seal is separated from the cover in the embodiment.

[0024] Figure 6 This is a cross-sectional view of the rubber seal and the cover body after they are joined together in the embodiment.

[0025] Figure 7 This is a schematic diagram of the fixing clip in the embodiment.

[0026] Figure 8 This is a schematic diagram illustrating the use of the fixing clip in the embodiment.

[0027] Reference numerals: 1. Syringe; 11. Piston rod; 12. Nipple; 13. Rubber core; 2. Needle shaft; 21. Needle plug; 22. Core tube; 3. Cap; 30. Cap groove; 31. Buckle groove; 32. Belt body; 33. Locking groove; 34. Absorbent sponge; 4. Rubber seal; 41. Buckle block; 5. Fixing clamp; 51. Grip; 52. Clamping opening; 53. Clamp A; 54. Clamp B. Detailed Implementation

[0028] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0029] like Figures 1 to 8The arterial blood collection needle shown includes a syringe barrel 1 and a needle shaft 2. The syringe barrel 1 has a retractable piston rod 11 at its tail end and a nipple 12 at its head end. The nipple 12 uses an existing positive pressure connector, that is, the end face of the nipple 12 has a through-hole, and a rubber core 13 is provided inside the through-hole. The rubber core 13 can undergo elastic deformation. The needle shaft 2 has a needle plug 21 at its tail end, and a tube 22 is provided inside the needle plug 21. The outer diameter of the tube 22 is smaller than the inner diameter of the through-hole. The inner circumferential surface of the needle plug 21 is threadedly connected to the outer circumferential surface of the nipple 12. When the needle plug 21 is connected to the nipple 12, the tube 22 pushes the rubber core 13 and moves into the through-hole. The rubber core 13 is compressed and opens the through-hole, so that the inner cavity of the needle shaft 2 is connected to the inner cavity of the syringe barrel 1. When the needle plug 21 is separated from the nipple 12, the tube 22 releases the rubber core 13 and moves out of the through-hole. The rubber core 13 resets and closes the through-hole. Before blood collection, medical staff attach the needle stem 2 to the nipple 12 of syringe 1. When the needle plug 21 is tightened, the core 22 pushes the rubber core 13, opening the port. Blood can then be drawn into syringe 1 through the needle stem 2. After blood collection, medical staff remove the needle stem 2 from the nipple 12 of syringe 1. When the needle plug 21 is loosened, the rubber core 13 returns to its original position, sealing the port and preventing liquid from leaking from the nipple 12 port.

[0030] Reference Figure 2 and Figure 3 The device also includes a cap 3 and a strap 32. The strap 32 is fixed at both ends to the outer circumferential surface of the cap 3 and the outer circumferential surface of the syringe tip 1, respectively. The cap 3 has a cap groove 30, the inner circumferential surface of which is threadedly connected to the outer circumferential surface of the nipple 12. The cap 3 covers the nipple 12, protecting it and preventing accidental opening of the opening due to the rubber core 13, thus preventing blood leakage. It also keeps the end face of the nipple 12 clean, reducing the risk of blood sample contamination. The strap 32 holds the cap 3 in place, securing it to the syringe 1 and preventing it from falling out of hand and becoming contaminated, further reducing the risk of blood sample contamination.

[0031] Reference Figures 4 to 6 It also includes a rubber seal 4, which can be referenced from existing blood collection needle seals (manufactured by Jinan Tianhou Medical Equipment Co., Ltd. Huaiyin Branch). The bottom of the rubber seal 4 is detachably connected to the top of the cover 3. After blood is drawn, the rubber seal 4 is removed and discarded along with the needle shaft 2. The rubber seal 4 is mounted on the cover 3, making it less likely to be lost and easy to retrieve.

[0032] The cover 3 has a groove 31 on its top, and the rubber seal 4 has a buckle 41 below it that matches the groove 31. The buckle 41 is fastened into the groove 31. Medical staff can remove the rubber seal 4 from the cover 3 simply by pulling the cover 3 and the rubber seal 4 apart.

[0033] Reference Figure 7 and Figure 8It also includes a fixing clip 5, which includes a clip A 53 and a clip B 54. Both clip A 53 and clip B 54 are "C" shaped. The outer diameter of the syringe 1 is slightly larger than the diameter of clip A 53, and the syringe 1 is clamped in the clamping opening 52 of clip A 53. The outer diameter of the cap 3 is slightly larger than the diameter of clip B 54, and the cap 3 is clamped in the clamping opening 52 of clip B 54. By fixing clip A 53 and clip B 54 respectively, the cap 3 is relatively fixed to the syringe 1, preventing the cap 3 from shaking randomly.

[0034] The cover 3 has a groove 33 on its outer circumferential surface. The clamping opening 52 of the B clamp 54 engages with the groove 33. The outer diameter of the rubber sealing element 4 is larger than the outer diameter of the groove 33, thus confining the B clamp 54 within the groove 33. The groove 33 fixes the position of the B clamp 54 on the cover 3, preventing the B clamp 54 from accidentally displacing and detaching from the cover 3.

[0035] A grip 51 is provided between clamp A 53 and clamp B 54. The grip 51 is longer than the width of a finger. The grip 51 extends the distance between clamp A 53 and clamp B 54, allowing medical staff to grip firmly and easily remove the fixing clip 5 from the syringe 1.

[0036] Reference Figure 6 The cap 30 has an absorbent sponge 34 on its surface, which is used to soak the sponge in disinfectant. After the cap 3 is closed, the absorbent sponge 34 fits tightly against the end face of the nipple 12. After blood collection, medical staff can use an existing dropper to drip disinfectant into the absorbent sponge 34, and then close the cap 3 onto the nipple 12, so that the disinfectant in the absorbent sponge 34 disinfects the nipple 12, reducing the risk of blood sample contamination.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An arterial blood collection needle, characterized in that: The syringe includes a syringe barrel (1) and a needle shaft (2). The syringe barrel (1) has a retractable piston rod (11) at its tail end and a nipple (12) at its head end. The nipple (12) uses an existing positive pressure connector, that is, the end face of the nipple (12) has a through-hole, and a rubber core (13) is provided inside the through-hole. The rubber core (13) can undergo elastic deformation. The needle stem (2) is provided with a needle plug (21) at the tail end. The needle plug (21) is provided with a core tube (22). The outer diameter of the core tube (22) is smaller than the inner diameter of the opening. The inner circumferential surface of the needle plug (21) is threadedly connected to the outer circumferential surface of the nipple (12). When the needle plug (21) is connected to the nipple (12), the core tube (22) pushes the rubber core (13) and moves into the opening. The rubber core (13) is compressed and opens the opening, so that the inner cavity of the needle stem (2) is connected to the inner cavity of the syringe (1). When the needle plug (21) is separated from the nipple (12), the core tube (22) loosens the rubber core (13) and moves out of the opening. The rubber core (13) resets and closes the opening.

2. The arterial lancet of claim 1 wherein: It also includes a cover (3) and a belt (32). The two ends of the belt (32) are fixed to the outer peripheral surface of the cover (3) and the outer peripheral surface of the head end of the syringe (1), respectively. The cover (3) is provided with a cover groove (30). The inner peripheral surface of the cover groove (30) is threadedly connected to the outer peripheral surface of the nipple (12) so that the cover (3) covers the nipple (12).

3. The arterial lancet of claim 2 wherein: It also includes a rubber seal (4), which is detachably connected to the cover (3) from below.

4. The arterial blood collection needle according to claim 3, characterized in that: The cover (3) has a groove (31) on its top, and the rubber seal (4) has a buckle (41) on its bottom that is adapted to the groove (31). The buckle (41) is snapped into the groove (31).

5. The arterial lancet of claim 3 wherein: It also includes a fixing clip (5), which includes a clamp A (53) and a clamp B (54). Both clamp A (53) and clamp B (54) are "C" shaped. The outer diameter of the syringe (1) is slightly larger than the diameter of clamp A (53). The syringe (1) is clamped in the clamping opening (52) of clamp A (53). The outer diameter of the cover (3) is slightly larger than the diameter of clamp B (54). The cover (3) is clamped in the clamping opening (52) of clamp B (54).

6. The arterial blood collection needle according to claim 5, characterized in that: The cover (3) has a slot (33) on its outer circumferential surface. The clamp (52) of the B clamp (54) is engaged with the slot (33). The outer diameter of the rubber seal (4) is larger than the outer diameter of the slot (33), so that the B clamp (54) is confined within the slot (33).

7. The arterial blood collection needle according to claim 5, characterized in that: A grip (51) is provided between the A clamp (53) and the B clamp (54), and the length of the grip (51) is greater than the width of a finger.

8. The arterial blood collection needle according to claim 2, characterized in that: The groove (30) of the cover is provided with an absorbent sponge (34) for immersing in disinfectant. After the cover (3) is closed, the absorbent sponge (34) is in close contact with the end face of the nipple (12).

Images