Puncture blood taking needle

Abstract

The utility model discloses a puncture blood taking needle, and relates to the technical field of blood taking needles. Comprising a needle base, the lower end of the needle base is fixedly connected with a needle tube, the needle tube is communicated with the needle base, scale marks are arranged on the outer side wall of the needle tube, a vernier is arranged on the needle tube, and the scale marks comprise scale transverse lines and scale dots. The scale marks on the outer side of the needle tube, especially the design of combining the scale transverse lines and the scale dots, provide clear visual reference for medical staff and facilitate accurate judgment of the blood sampling depth; an elastic piece and an abutting bolt in the adjusting cavity form a flexible abutting mechanism, so that the vernier can be tightly attached to the outer side of the needle tube and can be finely adjusted according to hand strength or blood sampling requirements of different users; in the puncture process, the vernier can automatically slide on the needle tube when making contact with the skin of a patient, when the needle tube is taken out, the puncture depth can be judged according to the position of the vernier, and medical staff can read out the puncture depth according to the position of the vernier.

Description

Technical Field

[0001] This utility model relates to the field of blood collection needle technology, and in particular to a puncture blood collection needle. Background Technology

[0002] A blood collection needle is an instrument used in medical testing to collect blood samples. It consists of a needle tip and a needle shaft. The needle tip is located at the head of the needle shaft. It can be used to puncture the atrium during forensic autopsies to collect cardiac blood, and it can also be used for emergency treatment of clinical diseases such as severe pericardial effusion.

[0003] When using existing blood collection needles, the insertion point of the needle into the patient's body is generally determined by experience. However, this judgment is uncertain and requires experienced medical personnel to make accurate judgments. Less experienced personnel may have difficulty grasping the technique and are prone to making mistakes. Even if there are graduation lines on the outer wall of the needle, there are no obvious markings when the needle is withdrawn, making it impossible to determine the insertion depth. To solve the above problems, this application proposes a puncture blood collection needle. Utility Model Content

[0004] The purpose of this invention is to provide a puncture and blood collection needle that solves the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a puncture blood collection needle, including a needle seat, a needle tube fixedly connected to the lower end of the needle seat, the needle tube communicating with the needle seat, a scale mark provided on the outer side wall of the needle tube, and a vernier provided on the needle tube;

[0006] The vernier includes a first movable block and a second movable block. The adjacent sidewalls of the first movable block and the second movable block are provided with mating grooves. The outer end of the needle tube is located in the two mating grooves respectively. Several connecting bolts are provided on the side of the first movable block away from the second movable block. The end of the connecting bolt near the first movable block passes through the first movable block and is threadedly connected to the side of the second movable block near the first movable block. An adjustment cavity is provided on the inner side of the second movable block, and an abutment mechanism is provided in the adjustment cavity.

[0007] Preferably, the adjusting cavity has an abutment hole on one side wall near the needle tube, the adjusting cavity is connected to the mating groove through the abutment hole, an elastic plate is provided in the adjusting cavity, an abutment bolt is provided on the rear side of the moving block two, the front end of the abutment bolt penetrates the rear side wall of the adjusting cavity and abuts against the rear side wall of the elastic plate, and the abutment bolt is threaded to the rear side wall of the adjusting cavity.

[0008] Preferably, the elastic sheet is arc-shaped, and limiting grooves are provided at both the upper and lower ends of the rear sidewall of the adjustment cavity. The upper and lower ends of the elastic sheet extend into the upper and lower limiting grooves respectively, and the front end of the elastic sheet passes through the abutment hole and abuts against the outer sidewall of the needle tube.

[0009] Preferably, the scale markings include scale lines and scale dots. The syringe is marked with scale lines every 1 mm, starting from the needle tip. The scale is changed to scale dots at 1 cm above the needle tip, and the scale is changed to scale dots at 2 cm and 2.1 cm above the needle tip, and the scale is changed to scale dots at 3 cm, 3.1 cm and 3.2 cm above the needle tip, and so on up to the top of the syringe.

[0010] Preferably, a needle core is provided on the inner side of the needle tube, the upper end of the needle core extends above the needle seat and is fixedly connected to a connector, and the outer side wall of the needle core abuts against the inner side wall of the needle tube.

[0011] Compared with related technologies, the puncture and blood collection needle provided by this utility model has the following beneficial effects:

[0012] 1. This utility model provides a puncture blood collection needle. The scale markings on the outside of the needle tube in this device, especially the design of the scale lines and scale dots, provide medical staff with a clear visual reference, making it easy to accurately judge the blood collection depth.

[0013] 2. This utility model provides a puncture blood collection needle. In the vernier, the elastic plate and abutment bolt within the adjustment cavity form a flexible abutment mechanism, allowing the vernier to fit tightly against the outside of the needle tube. Simultaneously, it can be finely adjusted according to different users' hand strength or blood collection needs, enhancing the stability and applicability of the blood collection needle. Furthermore, during the puncture process, when the vernier contacts the patient's skin, it can automatically slide on the needle tube. When the needle tube is removed, the puncture depth can be determined based on the vernier's position, allowing medical personnel to read the puncture depth. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0016] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0017] Figure 4 This is a schematic diagram of the vernier explosion structure of this utility model;

[0018] Figure 5 This is a three-dimensional cross-sectional structural diagram of the adjustment cavity position of this utility model;

[0019] Figure 6 This is a cross-sectional structural diagram of the vernier in use according to this utility model.

[0020] In the diagram: 1. Needle holder; 2. Needle tube; 3. Needle core; 4. Connector; 5. Vernier; 6. Scale line; 7. Scale dot; 8. Moving block one; 9. Moving block two; 10. Mating groove; 11. Connecting bolt; 12. Adjustment cavity; 13. Abutment hole; 14. Abutment bolt; 15. Elastic sheet; 16. Limiting groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-6 This utility model provides a technical solution: a puncture blood collection needle, including a needle seat 1, a needle tube 2 fixedly connected to the lower end of the needle seat 1, the needle tube 2 communicating with the needle seat 1, a scale mark provided on the outer side wall of the needle tube 2, and a vernier 5 provided on the needle tube 2.

[0023] The vernier 5 includes a first movable block 8 and a second movable block 9. The adjacent side walls of the first movable block 8 and the second movable block 9 are provided with mating grooves 10. The outer end of the needle tube 2 is located in the two mating grooves 10 respectively. Several connecting bolts 11 are provided on the side of the first movable block 8 away from the second movable block 9. The end of the connecting bolt 11 near the first movable block 8 passes through the first movable block 8 and is threadedly connected to the side of the second movable block 9 near the first movable block 8. An adjustment cavity 12 is provided on the inner side of the second movable block 9. An abutment mechanism is provided in the adjustment cavity 12.

[0024] An abutment hole 13 is provided on one side wall of the adjustment cavity 12 near the needle tube 2. The adjustment cavity 12 is connected to the mating groove 10 through the abutment hole 13. An elastic plate 15 is provided inside the adjustment cavity 12. An abutment bolt 14 is provided on the rear side of the moving block 2 9. The front end of the abutment bolt 14 penetrates the rear side wall of the adjustment cavity 12 and abuts against the rear side wall of the elastic plate 15. The abutment bolt 14 is threadedly connected to the rear side wall of the adjustment cavity 12. The force between the abutment bolt 14 and the elastic plate 15 is adjusted by rotating the abutment bolt 14, thereby adjusting the force between the elastic plate 15 and the needle tube 2, which facilitates the disassembly of the vernier 5 and meets different usage requirements.

[0025] The elastic plate 15 is arc-shaped. Limiting grooves 16 are provided at both the upper and lower ends of the rear side wall of the adjustment cavity 12. The upper and lower ends of the elastic plate 15 extend into the upper and lower limiting grooves 16 respectively. The front end of the elastic plate 15 passes through the abutment hole 13 and abuts against the outer side wall of the needle tube 2. The elastic plate 15 abuts against the outer side wall of the needle tube 2, thereby ensuring that the cursor 5 can stop at any position on the needle tube 2. When the cursor 5 contacts the patient's skin during puncture, it can automatically slide on the needle tube 2. When the needle tube 2 is removed, the puncture depth can be determined according to the position of the cursor 5. Medical staff can read the puncture depth according to the position of the cursor 5.

[0026] The scale markings include horizontal lines (6) and dots (7). Starting from the needle tip, the needle tube 2 is marked with horizontal lines (6) every 1mm. The markings change to dots (7) at 1cm above the needle tip, 2cm and 2.1cm above the needle tip, 3cm, 3.1cm and 3.2cm above the needle tip, and so on up to the top of the needle tube 2. These markings indicate the depth of needle insertion and whether the needle tube 2 has reached the pericardium, atrium, or ventricle. This system can also be used in the emergency treatment of severe pericardial effusion and other clinical conditions, where the needle depth can be easily determined through the scale markings on the needle surface. The design, especially the combination of horizontal lines (6) and dots (7), provides medical personnel with a clear visual reference, facilitating accurate judgment of blood sampling depth.

[0027] A needle core 3 is provided inside the needle tube 2. The upper end of the needle core 3 extends above the needle base 1 and is fixedly connected to a connector 4. The outer wall of the needle core 3 abuts against the inner wall of the needle tube 2.

[0028] Working principle: During use, the depth of needle insertion is indicated by the scale markings, showing whether the needle tube 2 has reached the pericardium, atrium, or ventricle. It can also be used in the emergency treatment of severe pericardial effusion and other clinical conditions, where the needle insertion depth can be determined via the scale markings on the needle surface. The design, particularly the combination of the horizontal lines 6 and the circular dots 7, provides medical personnel with a clear visual reference, facilitating accurate judgment of the blood sampling depth.

[0029] In the vernier 5, the elastic plate 15 and the abutment bolt 14 within the adjustment cavity 12 form a flexible abutment mechanism, allowing the vernier 5 to fit snugly against the outside of the needle tube 2. It can also be finely adjusted according to different users' hand strength or blood collection needs, enhancing the stability and applicability of the blood collection needle. During puncture, the vernier 5 automatically slides on the needle tube 2 when in contact with the patient's skin. When the needle tube 2 is removed, the position of the vernier 5 indicates the puncture depth, which medical personnel can read based on. Adjusting the force between the abutment bolt 14 and the elastic plate 15 by rotating the bolt 14 allows for easy disassembly of the vernier 5, thus meeting various usage requirements.

Claims

1. A puncture blood collection needle, comprising a needle hub (1), characterized in that: The lower end of the needle holder (1) is fixedly connected to a needle tube (2), the needle tube (2) is connected to the needle holder (1), a scale mark is provided on the outer side wall of the needle tube (2), and a vernier (5) is provided on the needle tube (2); The vernier (5) includes a first moving block (8) and a second moving block (9). The adjacent sidewalls of the first moving block (8) and the second moving block (9) are provided with mating grooves (10). The outer end of the needle tube (2) is located in the two mating grooves (10). The side of the first moving block (8) away from the second moving block (9) is provided with several connecting bolts (11). The end of the connecting bolt (11) near the first moving block (8) passes through the first moving block (8) and is threadedly connected to the side of the second moving block (9) near the first moving block (8). The inner side of the second moving block (9) is provided with an adjustment cavity (12). The adjustment cavity (12) is provided with an abutment mechanism.

2. The puncture and blood collection needle according to claim 1, characterized in that: The adjustment cavity (12) has an abutment hole (13) on one side wall near the needle tube (2). The adjustment cavity (12) is connected to the mating groove (10) through the abutment hole (13). An elastic plate (15) is provided in the adjustment cavity (12). An abutment bolt (14) is provided on the rear side of the moving block (9). The front end of the abutment bolt (14) penetrates the rear side wall of the adjustment cavity (12) and abuts against the rear side wall of the elastic plate (15). The abutment bolt (14) is threadedly connected to the rear side wall of the adjustment cavity (12).

3. The puncture and blood collection needle according to claim 2, characterized in that: The elastic sheet (15) is arc-shaped. Limiting grooves (16) are provided at both the upper and lower ends of the rear side wall of the adjustment cavity (12). The upper and lower ends of the elastic sheet (15) extend into the upper and lower limiting grooves (16) respectively. The front end of the elastic sheet (15) passes through the abutment hole (13) and abuts against the outer side wall of the needle tube (2).

4. The puncture and blood collection needle according to claim 1, characterized in that: The scale markings include scale lines (6) and scale dots (7). The needle tube (2) is marked with scale lines (6) every 1 mm, starting from the needle tip. The scale is changed to scale dots (7) at 1 cm from the needle tip, and the scale is changed to scale dots (7) at 2 cm and 2.1 cm from the needle tip, and the scale is changed to scale dots (7) at 3 cm, 3.1 cm and 3.2 cm from the needle tip, and so on up to the top of the needle tube (2).

5. A puncture and blood collection needle according to claim 1, characterized in that: The needle tube (2) is provided with a needle core (3) on the inner side. The upper end of the needle core (3) extends to the needle seat (1) and is fixedly connected to a connector (4). The outer side wall of the needle core (3) abuts against the inner side wall of the needle tube (2).

Images