Butterfly-shaped blood taking needle capable of preventing needle stick injury

By designing a butterfly-shaped blood collection needle to prevent needlestick injuries, and utilizing a containment sleeve and elastic valve to automatically close the needle tip, combined with transparent materials and adhesive layers, the problems of needlestick injuries and blood backflow for medical personnel have been solved, achieving safety and visibility in blood collection operations.

CN223489725UActive Publication Date: 2025-10-31WEST CHINA HOSPITAL SICHUAN UNIV
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Patent Information

Application Number
CN202422466752.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-12
Publication Date
2025-10-31
Estimated Expiration
2034-10-12

AI Technical Summary

Technical Problem

During blood collection, medical staff are prone to needle pricks due to lack of expertise or environmental factors, and they cannot observe the blood flow in real time, which makes it impossible to deal with blood return issues in a timely manner.

Method used

Design a butterfly-shaped blood collection needle to prevent needlestick injuries. It includes a blood transfusion tube, a needle, a receiving sleeve, and an elastic valve. The receiving sleeve automatically closes when the needle is withdrawn. Combined with transparent material and an adhesive layer, it is fixed to the patient's body surface to prevent needlestick injuries and allow observation of blood flow.

Benefits of technology

It effectively prevents needle pricks, simplifies procedures, improves blood collection safety, and promptly addresses blood backflow issues.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a butterfly-shaped blood taking needle capable of preventing needle stick injury, which belongs to the field of medical instruments and comprises a blood transfusion tube, a needle head and a connecting tube are arranged at two ends of the blood transfusion tube in the axial direction, the connecting tube is communicated with the blood transfusion tube, the needle head is communicated with the blood transfusion tube, and the central axis of the needle head coincides with the central axis of the blood transfusion tube. The containing sleeve is connected to the outside of the blood transfusion tube in a sleeving mode and can move to an initial position and a containing position in the axial direction of the blood transfusion tube, elastic petals are arranged at the end, facing the needle head, of the containing sleeve in a surrounding mode, and when the containing sleeve is located at the initial position, the elastic petals abut against the outer wall of the needle head; the containing sleeve is folded towards the central axis of the blood transfusion tube when moving to the containing position. By means of the arrangement, the containing sleeve can be driven to the containing position relative to the blood transfusion tube when a medical worker pulls out a needle from the body of a patient, and then the needle is prevented from puncturing the medical worker or the patient after being separated from the patient.
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Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a butterfly-shaped blood collection needle for preventing needlestick injuries. Background Technology

[0002] Blood collection is a common clinical nursing procedure. During blood collection, the two ends of a lancet are inserted sequentially into the patient's blood vessel and the blood collection tube, whereby negative pressure draws the patient's blood into the tube. However, during this procedure, inexperience or environmental factors can disrupt concentration, and the lack of needle protection after collection makes healthcare workers susceptible to needle stick injuries and occupational exposure. Furthermore, currently, healthcare workers cannot visually observe the blood flow within the lancet, making it difficult to promptly address situations where blood may flow back up.

[0003] Therefore, a device is designed that has the function of a blood collection needle and can prevent medical personnel from being pricked after blood collection. Specifically, this device is a butterfly-shaped blood collection needle that prevents needle pricks. Utility Model Content

[0004] To overcome the problems mentioned in the background art, the present invention adopts the following technical solution:

[0005] A butterfly-shaped blood collection needle for preventing needlestick injuries includes: a blood transfusion tube, with a needle tip and a connecting tube at both ends along the axial direction of the blood transfusion tube, the connecting tube communicating with the blood transfusion tube, the needle tip communicating with the blood transfusion tube, and the central axis of the needle tip coinciding with the central axis of the blood transfusion tube; and a receiving sleeve, which is fitted over the outside of the blood transfusion tube and is movable along the axial direction of the blood transfusion tube to an initial position and a receiving position. An elastic flap is provided around the end of the receiving sleeve facing the needle tip. When the receiving sleeve is in the initial position, the elastic flap abuts against the outer wall of the needle tip, and when the receiving sleeve moves to the receiving position, it retracts towards the central axis of the blood transfusion tube.

[0006] Furthermore, a wing is provided on the outer wall of the infusion tube, and a guide groove is formed on the outer wall of the receiving sleeve along the axial direction of the infusion tube. The wing can reciprocate within the guide groove along the axial direction of the infusion tube. When the receiving sleeve is in the initial position, the wing abuts against the end of the guide groove away from the needle. When the receiving sleeve moves to the receiving position, the wing abuts against the end of the guide groove near the needle. When the wing engages with the guide groove, it limits the travel distance of the receiving sleeve along the axial direction of the infusion tube. The travel distance of the receiving sleeve along the axial direction of the infusion tube is equal to the length of the guide groove along the axial direction of the infusion tube.

[0007] Furthermore, an elastic strip is provided at the end of the receiving sleeve away from the needle tip. The two ends of the elastic strip are respectively connected to the receiving sleeve and the infusion tube. When the receiving sleeve is not subjected to external force, it is maintained in the initial position by the elastic strip. There are at least two elastic strips, which are arranged in a circular array around the central axis of the receiving sleeve. The spacing between adjacent elastic strips in the circumferential direction of the receiving sleeve is the same.

[0008] Furthermore, the connecting tube is a flexible tube, and a guide tube is connected to the end of the connecting tube away from the infusion tube. The guide tube is connected to the connecting tube, and a guide hole is provided at the end of the guide tube away from the connecting tube.

[0009] Furthermore, two contact pieces are mirror-image arranged on the outer wall of the receiving sleeve, and an adhesive layer is provided on one side of each contact piece, with the adhesive layer disposed on the opposite sidewalls of the two contact pieces.

[0010] Furthermore, at least one set of the contact pieces is provided on the outer wall of the receiving sleeve along the axial direction of the receiving sleeve.

[0011] Furthermore, the infusion tube and the receiving sleeve are made of one of the following materials: transparent polypropylene, polycarbonate, or polyvinyl chloride.

[0012] Furthermore, the axial length of the receiving sleeve is greater than the axial length of the transfusion tube.

[0013] Furthermore, the outer diameter of the elastic flap is smaller than the outer diameter of the receiving sleeve.

[0014] Furthermore, the number of adhesive layers disposed on each of the contact pieces is at least one.

[0015] The beneficial effects of this utility model are:

[0016] 1. By incorporating a receiving sleeve that fits over the transfusion tube, and an elastic flap on the receiving sleeve that retracts towards the central axis of the receiving sleeve, the elastic flap closes when the receiving sleeve moves to the receiving position. After closure, the elastic flap restricts the needle from axially penetrating the receiving sleeve, allowing it to return to its initial position after reaching the receiving position. With a contact patch and adhesive layer that secure the receiving sleeve to the patient's skin, the receiving sleeve is driven relative to the transfusion tube to the receiving position when medical personnel remove the needle from the patient, thus preventing needle puncture injuries to medical personnel or the patient. This blood collection needle has a simple structure, is easy to use, and possesses excellent technical performance.

[0017] 2. By setting up a transparent receiving sleeve and transfusion tube, medical staff can observe the transfusion tube and the condition inside the transfusion tube through the receiving sleeve. Medical staff can pay attention to the blood flow during blood collection so that they can intervene if the blood flows backward. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 A schematic diagram of the overall structure of this utility model when the housing sleeve is in its initial position;

[0020] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0021] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0022] Figure 4 A schematic diagram of the overall structure of this utility model when the housing sleeve is in the housing position;

[0023] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure;

[0024] Figure 6 for Figure 5 A magnified view of the structure at point B in the middle;

[0025] Figure 7 This is a schematic diagram of the overall structure of the containment sleeve;

[0026] Figure 8 for Figure 7 A schematic diagram of the cross-sectional structure;

[0027] In the diagram, 1 is the infusion tube; 11 is the needle; 12 is the connecting tube; 13 is the flap; 14 is the guide tube; 141 is the guide hole; 2 is the receiving sleeve; 21 is the elastic valve; 22 is the guide groove; 23 is the elastic strip; 24 is the contact piece; and 241 is the adhesive layer. Detailed Implementation

[0028] The technical solutions of this utility model are clearly and completely described below through specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] A butterfly-shaped blood collection needle to prevent needlestick injuries, such as Figure 1-8 As shown, it includes: a blood transfusion tube 1, with a needle 11 and a connecting tube 12 at both ends along the axial direction of the blood transfusion tube 1. The connecting tube 12 is connected to the blood transfusion tube 1, and the needle 11 is connected to the blood transfusion tube 1. The central axis of the needle 11 coincides with the central axis of the blood transfusion tube 1. A receiving sleeve 2 is fitted onto the outside of the blood transfusion tube 1. The receiving sleeve 2 can move along the axial direction of the blood transfusion tube 1 to an initial position and a receiving position. An elastic flap 21 is arranged around the end of the receiving sleeve 2 facing the needle 11. When the receiving sleeve 2 is in the initial position, the elastic flap 21 abuts against the outer wall of the needle 11. When the receiving sleeve 2 moves to the receiving position, it retracts towards the central axis of the blood transfusion tube 1.

[0030] In some embodiments of this application, such as Figure 1-8 As shown, a wing 13 is provided on the outer wall of the infusion tube 1, and a guide groove 22 is formed on the outer wall of the receiving sleeve 2 along the axial direction of the infusion tube 1. The wing 13 can reciprocate within the guide groove 22 along the axial direction of the infusion tube 1. When the receiving sleeve 2 is in the initial position, the wing 13 abuts against the end of the guide groove 22 away from the needle 11. When the receiving sleeve 2 moves to the receiving position, the wing 13 abuts against the end of the guide groove 22 near the needle 11. When the wing 13 cooperates with the guide groove 22, it limits the travel distance of the receiving sleeve 2 in the axial direction of the infusion tube 1. The travel distance of the receiving sleeve 2 in the axial direction of the infusion tube 1 is the length of the guide groove 22 in the axial direction of the infusion tube 1.

[0031] In some embodiments of this application, such as Figure 1-8 As shown, an elastic strip 23 is provided at one end of the receiving sleeve 2 away from the needle 11. The two ends of the elastic strip 23 are connected to the receiving sleeve 2 and the infusion tube 1, respectively. When the receiving sleeve 2 is not subjected to external force, it is maintained in the initial position by the elastic strip 23. There are at least two elastic strips 23. The elastic strips 23 are arranged in a circular array around the central axis of the receiving sleeve 2. The spacing between adjacent elastic strips 23 in the circumferential direction of the receiving sleeve 2 is the same.

[0032] In some embodiments of this application, such as Figure 1-8As shown, the connecting tube 12 is a flexible tube. A guide tube 14 is connected to the end of the connecting tube 12 facing away from the infusion tube 1. The guide tube 14 communicates with the connecting tube 12, and a guide hole 141 is provided at the end of the guide tube 14 facing away from the connecting tube 12. After the blood enters the infusion tube 1 through the needle 11, it flows through the connecting tube 12 and exits through the guide hole 141. The outer diameter of the guide tube 14 is smaller than the outer diameter of the connecting tube 12. The guide tube 14 is used to insert into the blood collection tube and introduce negative pressure from the blood collection tube into the connecting tube 12 and the infusion tube 1 through the guide hole 141.

[0033] In some embodiments of this application, such as Figure 1-8 As shown, two contact pieces 24 are mirror-image arranged on the outer wall of the receiving sleeve 2. An adhesive layer 241 is provided on one side of the contact piece 24. The adhesive layer 241 is provided on the opposite sidewalls of the two contact pieces 24. A non-adhesive layer is also connected to the end of the adhesive layer 241 away from the contact piece 24. The non-adhesive layer and the adhesive layer 241 abut against each other under the action of surface tension.

[0034] In some embodiments of this application, such as Figure 1-8 As shown, at least one set of contact pieces 24 are provided on the outer wall of the receiving sleeve 2 along the axial direction of the receiving sleeve 2; the contact pieces 24 are used to bond to the patient's skin or clothing through the adhesive layer 241 after the needle 11 is inserted into the patient's body surface, so that the receiving sleeve 2 can be driven relative to the infusion tube 1 to the receiving position when the medical staff pulls out the needle 11 from the patient's body, thereby preventing the needle 11 from pricking the medical staff or the patient.

[0035] In some embodiments of this application, such as Figure 1-8 As shown, the infusion tube 1 and the receiving sleeve 2 are made of one of transparent polypropylene, polycarbonate, or polyvinyl chloride. Medical personnel can observe the infusion tube 1 and the condition inside the infusion tube 1 through the receiving sleeve 2 when the receiving sleeve 2 is in any position. Medical personnel can pay attention to the blood flow during blood collection so that they can intervene if the blood flows backward.

[0036] In some embodiments of this application, such as Figure 1-8 As shown, the axial length of the receiving sleeve 2 is greater than the axial length of the infusion tube 1 to ensure that the receiving sleeve 2 can accommodate the infusion tube 1. The protruding end of the needle 11 on the receiving sleeve 2 is tapered, and the outer diameter of the tapered end gradually decreases along the direction of the needle 11 protrusion. This design can prevent the receiving sleeve 2 from obstructing the medical staff's observation of the protrusion length of the needle 11 when it is protruding. The outer diameter of the elastic flap 21 is smaller than the outer diameter of the receiving sleeve 2. Each contact piece 24 has at least one adhesive layer 241, and multiple adhesive layers 241 are arrayed on the contact piece 24. If one adhesive layer 241 fails, the remaining adhesive layers 241 can still connect the contact piece 24 to the patient's body surface.

[0037] When in use, medical personnel push the wing 13 to push the needle 11 out of the housing sleeve 2 and insert it into the patient's body surface. After the needle 11 is fixed in position, the contact piece 24 with the adhesive layer 241 is fixed to the patient's body surface. After blood collection is completed, the medical personnel hold the connecting tube 12 with one hand and press the contact piece 24 with the other hand, and then pull the connecting tube 12 away from the patient's body surface to make the needle 11 detach from the patient. Since the housing sleeve 2 is fixed to the patient's body surface by the contact piece 24 at this time, the needle 11 will return to the housing sleeve 2, which can effectively prevent needle stick injuries.

Claims

1. A butterfly-shaped blood collection needle for preventing needlestick injuries, characterized in that, include: The infusion vessel has needles and connecting tubes at its two axial ends. The connecting tubes are connected to the infusion vessel, and the needles are connected to the infusion vessel. The central axis of the needles coincides with the central axis of the infusion vessel. A receiving sleeve is fitted over the outside of the infusion tube. The receiving sleeve can move along the axial direction of the infusion tube to an initial position and a receiving position. An elastic flap is provided around the end of the receiving sleeve facing the needle. When the receiving sleeve is in the initial position, the elastic flap abuts against the outer wall of the needle. When the receiving sleeve moves to the receiving position, it retracts towards the central axis of the infusion tube.

2. The butterfly-shaped blood collection needle for preventing needlestick injuries according to claim 1, characterized in that, The outer wall of the infusion tube is provided with a wing, and the outer wall of the receiving sleeve is provided with a guide groove along the axial direction of the infusion tube. The wing can reciprocate within the guide groove along the axial direction of the infusion tube. When the receiving sleeve is in the initial position, the wing abuts against the end of the guide groove away from the needle. When the receiving sleeve moves to the receiving position, the wing abuts against the end of the guide groove near the needle.

3. The butterfly-shaped blood collection needle for preventing needlestick injuries according to claim 1, characterized in that, The receiving sleeve has an elastic strip at one end away from the needle. The two ends of the elastic strip are connected to the receiving sleeve and the infusion tube, respectively. When the receiving sleeve is not subjected to external force, it is maintained in its initial position by the elastic strip.

4. A butterfly-shaped blood collection needle for preventing needlestick injuries according to claim 1, characterized in that, The connecting tube is a flexible tube, and a guide tube is connected to the end of the connecting tube away from the infusion tube. The guide tube is connected to the connecting tube, and a guide hole is provided at the end of the guide tube away from the connecting tube.

5. A butterfly-shaped blood collection needle for preventing needlestick injuries according to claim 1, characterized in that, The outer wall of the receiving sleeve has two contact pieces mirrored on it. One side of each contact piece has an adhesive layer, which is disposed on the opposite sidewalls of the two contact pieces.

6. A butterfly-shaped blood collection needle for preventing needlestick injuries according to claim 5, characterized in that, At least one set of contact pieces is provided on the outer wall of the receiving sleeve along the axial direction of the receiving sleeve.

7. A butterfly-shaped blood collection needle for preventing needlestick injuries according to claim 1, characterized in that, The infusion tube and the containment sleeve are made of one of the following materials: transparent polypropylene, polycarbonate, or polyvinyl chloride.

8. A butterfly-shaped blood collection needle for preventing needlestick injuries according to claim 1, characterized in that, The axial length of the receiving sleeve is greater than the axial length of the infusion tube.

9. A butterfly-shaped blood collection needle for preventing needlestick injuries according to claim 1, characterized in that, The outer diameter of the elastic flap is smaller than the outer diameter of the receiving sleeve.

10. A butterfly-shaped blood collection needle for preventing needlestick injuries according to claim 5, characterized in that, The number of adhesive layers provided on each of the contact pieces is at least one.