Safe infusion port needle

Abstract

A safe infusion port needle, comprising: a main body part (1), wherein a convex part (11) is arranged on a front surface of the main body part (1), a concave cavity (12) is formed on a back surface of the main body part (1), a limiting elastic piece (4) is arranged in the concave cavity (12), the limiting elastic piece (4) comprises a first limiting part (41) and a second limiting part (42) elastically bent relative to the first limiting part (41), and a through hole (43) is formed on the first limiting part (41); a needle seat (2), wherein a puncture needle (5) is arranged on the needle seat (2), and a tip of the puncture needle (5) is provided with a bent head part (51); and a bottom cover (3), arranged on the back surface of the main body part (1) and sealing the concave cavity (12), wherein a penetrating hole (31) is formed on the bottom cover (3). In a factory state, the needle seat (2) is connected to the main body part (1), and the puncture needle (5) extends into the concave cavity (12), passes through the through hole (43), and penetrates out of the penetrating hole (31) to expose the bent head part (51). In a needle retraction state, the needle seat (2) is separated from the main body part (1), the bent head part (51) retracts into the concave cavity (12) and is limited by the through hole (43), thereby limiting the upward travel of the puncture needle (5), while the second limiting part (42) blocks the penetrating hole (31), thereby limiting the downward travel of the puncture needle (5).

Description

Safety port needle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 21, 2023, with application number 202311773940.X. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of medical devices, for example, to a safety infusion port needle. Background Art

[0003] An implantable venous port is a fully implantable vascular access system that provides long-term venous access. It offers safe and reliable venous access for patients requiring long-term and recurring intravenous therapy, reducing the pain and risks of repeated venipunctures. It is the "port" for intravenous therapy, hence the name "port." Because the port is securely embedded within the body, leaving no surface wounds or exposed catheter parts, it prevents contact with the catheter during use. Currently, it offers the lowest infection rate and is designed for long-term use.

[0004] During treatments like hemodialysis and intravenous chemotherapy, a suitable port needle is inserted into the port's rubber stopper to connect the internal vascular channel to the outside world. Because of the puncture required, the port needle inevitably leaves an exposed tip, posing a high risk of needlesticks to both doctors and patients, which can easily lead to bloodstream infections and pose a significant risk.

[0005] Some infusion port needles in related technologies have complex structures, large volumes, high costs, and are inconvenient to use. It is hoped that the structure of the infusion port needle can be optimized.

[0006] Summary of the Invention

[0007] The present application provides a safe infusion port needle, which simplifies the infusion port needle structure, reduces costs, improves safety of use, and reduces the risk of needle sticks.

[0008] The present application provides a safe infusion port needle, comprising:

[0009] The main body has a raised portion on the front side and a concave cavity on the back side. A limiting spring is provided in the concave cavity. The limiting spring includes a first limiting portion and a second limiting portion elastically bent relative to the first limiting portion. A through hole is provided on the first limiting portion.

[0010] A needle holder is provided with a puncture needle, and the tip of the puncture needle is provided with an elbow;

[0011] A bottom cover is provided on the back of the main body and covers the concave cavity, and a perforation is provided on the bottom cover;

[0012] When the safety infusion port needle is in the factory state, the needle base is connected to the main body, the puncture needle is inserted into the concave cavity, and passes through the through hole and out of the perforation, exposing the elbow;

[0013] When the safety infusion port needle is in the withdrawn state, the needle seat is separated from the main body, the elbow part retreats into the concave cavity and is limited by the through hole, thereby limiting the upward stroke of the puncture needle, and the second limiting part blocks the perforation, thereby limiting the downward stroke of the puncture needle.

[0014] Optionally, the surface of the puncture needle is also provided with a sleeve, and the lower end of the sleeve is provided with a flared portion, which is located in the area between the first limiting portion and the second limiting portion. The outer diameter of the sleeve is smaller than the aperture of the through hole, and the outer diameter of the flared portion is larger than the aperture of the through hole.

[0015] Optionally, a guide portion extending along the puncture needle is provided on the raised portion, and the guide portion is configured to prevent the elbow portion from escaping from the concave cavity.

[0016] Optionally, when the safety infusion port needle is in the withdrawn state, the limiting spring piece resets to a C shape; when the safety infusion port needle is in the factory state, the puncture needle passes through the through hole of the first limiting part, and the second limiting part bends to store energy and rests against the side wall of the puncture needle.

[0017] Optionally, a notch is provided on the edge of the second limiting portion that abuts against the puncture needle.

[0018] Optionally, an infusion tube connected to the tail end of the puncture needle is provided on the needle seat, the tail end of the puncture needle is bent toward the main body, and the infusion tube is arranged along the plane where the main body is located.

[0019] Optionally, a relief opening is provided on the main body corresponding to the infusion tube.

[0020] Optionally, the needle seat is snapped onto the raised portion, a ridge is provided on the side surface of the raised portion, and a groove is provided on the inner wall of the needle seat corresponding to the ridge.

[0021] Optionally, the bottom cover is snap-connected to the main body, a raised latching tooth is provided on the back of the main body, and a latching groove is provided on the bottom cover corresponding to the latching tooth.

[0022] Optionally, a recessed groove is provided on the bottom cover to provide space for the limiting spring to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic structural diagram of a safety infusion port needle provided in an embodiment of the present application;

[0024] FIG2 is an exploded view of the structure of a safety infusion port needle provided in an embodiment of the present application;

[0025] FIG3 is a second exploded view of the structure of a safety infusion port needle provided in an embodiment of the present application;

[0026] FIG4 is a cross-sectional view of the structure of the safety infusion port needle provided in an embodiment of the present application in a factory-delivered state;

[0027] FIG5 is a cross-sectional view of the structure of the safety infusion port needle provided in an embodiment of the present application in a withdrawn state;

[0028] Figure 6 is an enlarged view of point A in Figure 5;

[0029] FIG7 is a schematic structural diagram of a position-limiting spring in a safety infusion port needle provided in an embodiment of the present application;

[0030] FIG8 is a schematic diagram of the action process of the limiting spring in FIG7 .

[0031] In the figure: 1. Main body; 11. Raised portion; 12. Concave cavity; 13. Guide portion; 14. Avoidance opening; 15. Raised ridge; 16. Clamping tooth; 2. Needle seat; 21. Groove; 3. Bottom cover; 31. Perforation; 32. Clamping slot; 33. Sink; 4. Limiting spring; 41. First limiting portion; 42. Second limiting portion; 43. Through hole; 44. Notch; 4', limiting spring; 41', First limiting portion; 42', Second limiting portion; 43', Third limiting portion; 44', Fourth limiting portion; 45', Through hole; 5. Puncture needle; 51, Elbow portion; 6. Infusion tube; 7. Cannula; 71, Flaring portion. DETAILED DESCRIPTION

[0032] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0033] Referring to FIG. 1 to FIG. 3 , this embodiment provides a safety infusion port needle, comprising a main body 1 , a needle seat 2 and a bottom cover 3 .

[0034] The front of the main body 1 is provided with a raised portion 11, and a concave cavity 12 is formed on the back of the main body 1. The main body 1 here can be in the shape of a straw hat, and the height of the raised portion 11 is reasonably designed to control the volume of the main body 1 and facilitate attachment to the patient's body surface.

[0035] A limiting spring piece 4 is disposed in the cavity 12 . The limiting spring piece 4 includes a first limiting portion 41 and a second limiting portion 42 elastically bent relative to the first limiting portion 41 . A through hole 43 is defined in the first limiting portion 41 .

[0036] A puncture needle 5 is provided on the needle seat 2, and the puncture needle 5 can just pass through the through hole 43, and the tip of the puncture needle 5 is provided with an elbow 51, which can effectively prevent puncture and leakage of debris, and the angle between the elbow 51 and the vertical part is about 169°, which makes it easy to remove the needle and can be operated with one hand.

[0037] The bottom cover 3 is disposed on the back side of the main body 1 and covers the cavity 12 . A through hole 31 is formed in the bottom cover 3 .

[0038] As shown in FIG4 , in the factory state, the needle hub 2 is connected to the main body 1 , the puncture needle 5 extends into the concave cavity 12 , passes through the through hole 43 and out of the through hole 31 , exposing the elbow 51 so as to pierce the infusion port.

[0039] As shown in Figure 5, in the needle retracted state, the needle seat 2 is separated from the main body 1, the elbow portion 51 is retracted into the concave cavity 12 and is limited by the through hole 43, thereby limiting the upward stroke of the puncture needle 5, and the second limiting portion 42 blocks the perforation 31, thereby limiting the downward stroke of the puncture needle 5 and hiding the needle tip to reduce the risk of acupuncture.

[0040] Optionally, a stainless steel sleeve 7 is also provided on the surface of the puncture needle 5, and a flared portion 71 is provided at the lower end of the sleeve 7. The flared portion 71 is located in the area between the first limiting portion 41 and the second limiting portion 42, and the outer diameter of the sleeve 7 is smaller than the aperture of the through hole 43, and the outer diameter of the flared portion 71 is larger than the aperture of the through hole 43.

[0041] 4 , since the second limiting portion 42 remains against the puncture needle 5, the downward stroke of the flared portion 71 is restricted, resulting in the sleeve 7 being unable to freely escape; in the state of FIG5 , the needle tip of the puncture needle 5 slides into the limiting spring piece 4, and the elbow portion 51 moves upward with the sleeve 7 until the upward stroke of the flared portion 71 is restricted by the through hole 43, resulting in neither the needle tip nor the elbow portion 51 escaping from the concave cavity 12, further improving the anti-needlestick capability, as shown in FIG6 .

[0042] A guide portion 13 extending along the puncture needle 5 is provided on the raised portion 11. The guide portion 13 is used to prevent the elbow portion 51 from escaping from the concave cavity 12, thereby avoiding the failure of the through hole 43 to limit the elbow portion 51. On this basis, even if there is no through hole 43, the guide portion 13 also has a limiting function.

[0043] The deformation process of the limiting spring piece 4 is as follows: in the factory state, the puncture needle 5 passes through the through hole 43 of the first limiting portion 41, and the second limiting portion 42 bends to store energy and rests against the side wall of the puncture needle 5; in the needle withdrawal state, the limiting spring piece 4 resets to a C shape.

[0044] A notch 44 is provided on the edge of the second limiting portion 42 that abuts against the puncture needle 5. The side wall of the puncture needle 5 is embedded in the notch 44. On the one hand, it can be centered to ensure that the needle body is vertical. On the other hand, it can reduce the top pressure on the needle body, and under normal conditions, it will not affect the elastic force of the limiting spring piece 4.

[0045] The needle holder 2 is provided with an infusion tube 6 connected to the tail end of the puncture needle 5. The tail end of the puncture needle 5 is bent toward the main body 1. The infusion tube 6 is arranged along the plane of the main body 1 to facilitate skin fixation.

[0046] The main body 1 is provided with a relief opening 14 corresponding to the infusion tube 6 .

[0047] The needle seat 2 is snapped onto the raised portion 11. A ridge 15 is provided on the side surface of the raised portion 11. A groove 21 is provided on the inner wall of the needle seat 2 corresponding to the ridge 15. The ridge 15 and the groove 21 are simply matched to facilitate separation of the needle seat 2 from the main body 1.

[0048] The bottom cover 3 is connected to the main body 1 by snapping. A protruding latching tooth 16 is provided on the back of the main body 1 , and a latching slot 32 is provided on the bottom cover 3 corresponding to the latching tooth 16 .

[0049] The bottom cover 3 is provided with a recessed groove 33 to provide space for the limiting spring 4 to move.

[0050] In addition, this embodiment further provides a position-limiting spring piece 4' with a deformable structure, which can also satisfy the function of limiting the up and down travel of the puncture needle 5, as shown in Figures 7 and 8 for details.

[0051] The limiting spring piece 4' includes a first limiting portion 41', a second limiting portion 42' extends from the first side of the first limiting portion 41', and a third limiting portion 43' and a fourth limiting portion 44' extend from the second side of the first limiting portion 41'. The third limiting portion 43' can be directly formed by dividing the fourth limiting portion 44', wherein the first limiting portion 41' is provided with a through hole 45' for the puncture needle 5 to pass through; at least the fourth limiting portion 44' can be elastically bent relative to the first limiting portion 41', and under normal circumstances, the fourth limiting portion 44' and the first limiting portion 41' are Z-shaped; the second limiting portion 42' and the third limiting portion 43' abut against the side wall of the concave cavity 12, so that the overall posture of the limiting spring piece 4' is stable, ensuring that its limiting function is reliable.

[0052] In the factory state, the puncture needle 5 is extended into the concave cavity 12, passes through the through hole 45', and then passes through the perforation 31, and the end edge of the fourth limiting portion 44' remains against the surface of the puncture needle 5; in the needle withdrawal state, the elbow portion 51 of the puncture needle 5 is withdrawn into the concave cavity 12 and limited by the through hole 45', thereby limiting the upward stroke of the puncture needle 5. At the same time, the fourth limiting portion 44' is elastically reset, so that the end edge of the fourth limiting portion 44' blocks the perforation 31, thereby limiting the downward stroke of the puncture needle 5 and hiding the needle tip, reducing the risk of acupuncture.

[0053] In summary, the above-mentioned safety infusion port is designed with a limiting spring piece 4 to limit the up and down travel of the puncture needle 5 after the needle is withdrawn, according to the shape of the elbow part 51 of the puncture needle 5, thereby burying the needle tip in the main body 1, effectively reducing the risk of needle sticks, improving the safety of use, and being easy to operate, simple in structure, and low in cost.

Claims

1. A safe infusion port needle, comprising: A main body (1), wherein a protrusion (11) is arranged on the front side of the main body (1), a cavity (12) is formed on the back side of the main body (1), a limiting spring sheet (4) is arranged in the cavity (12), the limiting spring sheet (4) comprises a first limiting portion (41) and a second limiting portion (42) elastically bent relative to the first limiting portion (41), and a through hole (43) is provided on the first limiting portion (41); A needle seat (2), wherein a puncture needle (5) is arranged on the needle seat (2), and a bend portion (51) is arranged at the tip of the puncture needle (5); A bottom cover (3), the bottom cover (3) being arranged on the back side of the main body (1) and covering the concave cavity (12), and a through hole (31) being formed on the bottom cover (3); In the factory state, the needle holder (2) is connected to the main body (1), the puncture needle (5) extends into the concave cavity (12), passes through the through hole (43), and exits from the perforation (31), exposing the elbow (51); When the safety infusion port needle is in the withdrawn state, the needle seat (2) is separated from the main body (1), the elbow portion (51) is withdrawn into the concave cavity (12) and is limited by the through hole (43), thereby limiting the upward stroke of the puncture needle (5), and the second limiting portion (42) blocks the perforation (31), thereby limiting the downward stroke of the puncture needle (5).

2. The safety infusion port needle according to claim 1, wherein: The surface of the puncture needle (5) is also sleeved with a sleeve (7), and the lower end of the sleeve (7) is provided with a flared portion (71), and the flared portion (71) is located in the area between the first limiting portion (41) and the second limiting portion (42), the outer diameter of the sleeve (7) is smaller than the aperture of the through hole (43), and the outer diameter of the flared portion (71) is larger than the aperture of the through hole (43).

3. The safe infusion port needle according to claim 1, wherein: The raised portion (11) is provided with a guide portion (13) extending along the puncture needle (5), and the guide portion (13) is configured to prevent the elbow portion (51) from escaping from the concave cavity (12).

4. The safety infusion port needle according to claim 1, wherein: When the safety infusion port needle is in the withdrawn state, the limiting spring sheet (4) is reset to a C shape; when the safety infusion port needle is in the factory state, the puncture needle (5) passes through the through hole (43) of the first limiting portion (41), and the second limiting portion (42) bends to store energy and abuts against the side wall of the puncture needle (5).

5. The safety infusion port needle according to claim 4, wherein: A notch (44) is provided on the edge of the second limiting portion (42) that abuts against the puncture needle (5).

6. The safety infusion port needle according to claim 1, wherein: The needle holder (2) is provided with an infusion tube (6) connected to the tail end of the puncture needle (5), the tail end of the puncture needle (5) is bent toward the main body (1), and the infusion tube (6) is arranged along the plane where the main body (1) is located.

7. The safety infusion port needle according to claim 6, wherein: The main body (1) is provided with a relief opening (14) corresponding to the infusion tube (6).

8. The safety infusion port needle according to claim 1, wherein: The needle seat (2) is snapped onto the raised portion (11); a ridge (15) is provided on the side surface of the raised portion (11); and a groove (21) is provided on the inner wall of the needle seat (2) corresponding to the ridge (15).

9. The safety infusion port needle according to claim 1, wherein: The bottom cover (3) is snap-connected to the main body (1); a raised latching tooth (16) is provided on the back of the main body (1); and a latching groove (32) is provided on the bottom cover (3) corresponding to the latching tooth (16).

10. The safety infusion port needle according to claim 1, wherein: The bottom cover (3) is provided with a sink groove (33) for providing movement space for the limiting spring piece (4).

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