A blood sample collector for hemodialysis room

Abstract

The utility model discloses a blood sample collector for a hemodialysis room, comprising a cylindrical tube body, wherein a first annular partition, a second annular partition, a third annular partition and a fourth annular partition are sequentially arranged in the tube body along the axial direction of the tube body, a first sealed cavity is formed between the first annular partition and the second annular partition, a vacuum cavity is formed between the second annular partition and the third annular partition, and a second sealed cavity is formed between the third annular partition and the fourth annular partition; a needle body is arranged inside the tube body, and a through hole is arranged on the needle body; in an initial state, the tip of the needle body is located in the vacuum cavity, the tail end of the needle body is located outside the tube body, the through hole on the needle body is located in the second sealing rubber plug, a pressing part is arranged at the tail end of the needle body, and a spring is sleeved on the needle body between the pressing part and the fourth annular partition; rapid collection of blood samples is achieved, the collection process is simple and convenient, the hemodialysis circuit tube will not be punctured, and during use, the tip of the needle body is not exposed, and there is no risk of being stabbed by the tip of the needle body.

Description

Technical Field

[0001] The utility model relates to the technical field of blood collection needles, in particular to a blood sample collector for a hemodialysis room. Background Art

[0002] Hemodialysis room, abbreviated as hemodialysis room, is a place where renal replacement therapy is performed on patients with chronic renal failure or acute renal failure caused by related diseases by means of hemodialysis. Hemodialysis is a process of draining blood from the body to the outside of the body through a dialyzer composed of countless hollow fibers. The blood and an electrolyte solution (dialysate) containing a concentration similar to that of the body are exchanged inside and outside the hollow fibers through the principles of diffusion, ultrafiltration, adsorption and convection to remove metabolic waste from the body, maintain electrolyte and acid-base balance, and remove excess water from the body. The whole process of returning the purified blood is called hemodialysis.

[0003] During hemodialysis treatment, it is usually necessary to collect blood samples before and after dialysis in order to understand the patient's body index and dialysis effect during the treatment stage, so as to adjust and improve the treatment plan in a timely manner. At present, when collecting blood samples, a syringe or a blood collection needle is usually inserted into a sampling port provided on the hemodialysis circuit tube to extract blood. Since the diameter of the hemodialysis circuit tube and the size of the sampling port are relatively small, it is not easy to align the syringe or the blood collection needle when inserting it, and it is also necessary to pay attention to the insertion depth of the needle to avoid the needle being inserted too deeply and piercing the hemodialysis circuit tube. At the same time, since the needles of the syringe and the blood collection needle are exposed during use, there is also a risk of being stabbed by the needle. Utility Model Content

[0004] The utility model aims to provide a blood sample collector for a hemodialysis room, which can realize the rapid collection of blood samples. The collection process is simple and convenient, and the hemodialysis circuit tube will not be punctured. Moreover, during use, the needle is not exposed, and there is no risk of being stabbed by the needle.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A blood sample collector for a hemodialysis room comprises a cylindrical tube body, wherein a first annular baffle, a second annular baffle, a third annular baffle and a fourth annular baffle are sequentially arranged in the tube body along the axial direction thereof, a first sealed cavity is formed between the first annular baffle and the second annular baffle, and a first sealing rubber plug is arranged in the first sealed cavity, a vacuum cavity is formed between the second annular baffle and the third annular baffle, a second sealed cavity is formed between the third annular baffle and the fourth annular baffle, and a second sealing rubber plug is arranged in the second sealed cavity; a needle body is arranged in the tube body, and a through hole is arranged on the needle body; in an initial state, the tip of the needle body is located in the vacuum cavity, and the tail end of the needle body is located outside the tube body after sequentially passing through the third annular baffle, the second sealing rubber plug and the fourth annular baffle, and the through hole on the needle body is located in the second sealing rubber plug, a pressing portion is arranged at the tail end of the needle body, and a spring is sleeved on the needle body between the pressing portion and the fourth annular baffle.

[0007] As a preferred embodiment of the utility model, the inside of the tube body outside the first annular partition forms a plug-in groove, and the plug-in groove is used to connect with the sampling port on the hemodialysis circuit tube; it is convenient for the tube body to be quickly connected with the sampling port, and at the same time ensures that the needle body can accurately penetrate the sampling port.

[0008] As a preferred embodiment of the present invention, a flange structure is provided on the outer circumferential surface of the tube body close to the fourth annular partition; when pressing the pressing part at the tail end of the needle body, it is helpful for the fingers (index finger and middle finger) of the medical staff to clamp the tube body.

[0009] As a preferred embodiment of the present invention, an additional vacuum tank is provided on the side of the tube body, and the additional vacuum tank is connected to the vacuum cavity inside the tube body; the additional vacuum tank can increase the volume of the vacuum cavity inside the tube body, so as to collect and accommodate more blood samples.

[0010] As a preferred embodiment of the present invention, the tube body and the additional vacuum tank are made of transparent plastic, which facilitates intuitive observation of the internal conditions of the tube body and the additional vacuum tank.

[0011] As a preferred embodiment of the present invention, a plurality of through holes are provided on the needle body to ensure smooth blood flow path.

[0012] As a preferred embodiment of the present invention, a protective sleeve is provided on the periphery of the tail end of the needle body, and the protective sleeve is plug-connected with the end of the tube body; when the outer packaging bag is unopened, accidental pressing of the pressing part of the tail end of the needle body is avoided.

[0013] The utility model is beneficial in that:

[0014] (1) A plug-in slot is provided at the front end of the tube body, through which the tube body and the sampling port on the hemodialysis circuit tube can be quickly connected, while ensuring that the needle body can accurately penetrate the sampling port;

[0015] (2) The needle is inserted into the sampling port by pressing, and the insertion depth of the needle can be limited, effectively preventing the needle from penetrating the hemodialysis circuit tube;

[0016] (3) Rapid collection of blood samples is achieved, and the collection process is simple and convenient. In addition, during use, the tip of the needle is not exposed, and there is no risk of being stabbed by the tip of the needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model in the initial state;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model in use;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model when collecting blood samples.

[0021] Meaning of the reference numerals in the figures:

[0022] 1-tube body, 2-first sealing rubber plug, 3-vacuum chamber, 4-second sealing rubber plug;

[0023] 5-needle body, 6-through hole, 7-pressing part, 8-spring, 9-additional vacuum tank, 10-insertion slot;

[0024] 11-first annular partition, 12-second annular partition, 13-third annular partition;

[0025] 14- fourth annular partition, 15- flange structure, 16- protective sleeve;

[0026] 20-hemodialysis circuit tube, 21-sampling port. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1-4As shown, this embodiment is a blood sample collector for a hemodialysis room, comprising a cylindrical tube body 1, wherein a first annular baffle 11, a second annular baffle 12, a third annular baffle 13 and a fourth annular baffle 14 are sequentially arranged in the axial direction of the tube body 1, a first sealed cavity is formed between the first annular baffle 11 and the second annular baffle 12, and a first sealing rubber plug 2 is arranged inside the first sealed cavity, a vacuum cavity 3 is formed between the second annular baffle 12 and the third annular baffle 13, a second sealed cavity is formed between the third annular baffle 13 and the fourth annular baffle 14 ... and a vacuum cavity 3 is formed between the second annular baffle 12 and the third annular baffle 13 and the fourth annular baffle 14. A second sealing rubber plug 4 is arranged inside the cavity; a needle body 5 is arranged inside the tube body 1, and a through hole 6 is arranged on the needle body 5. There are multiple through holes 6 on the needle body 5 to ensure the smooth flow path of blood; in the initial state, the tip of the needle body 5 is located in the vacuum chamber 3, and the tail end of the needle body 5 is located outside the tube body 1 after passing through the third annular partition 13, the second sealing rubber plug 4 and the fourth annular partition 14 in sequence, and the through hole 6 on the needle body 5 is located in the second sealing rubber plug 4, and a pressing part 7 is arranged at the tail end of the needle body 5, and a spring 8 is sleeved on the needle body 5 between the pressing part 7 and the fourth annular partition 14.

[0029] In this embodiment, the inside of the tube body 1 outside the first annular partition 11 forms an insertion groove 10, and the insertion groove 10 is used to connect with the sampling port 21 on the hemodialysis circuit tube 20; it is convenient for the tube body 1 to be quickly connected with the sampling port 21, and at the same time ensures that the needle body 5 can accurately penetrate the sampling port 21; the outer circumferential surface of the tube body 1 close to the fourth annular partition 14 is provided with a flange structure 15, and the flange structure 15 surrounds the outer circumferential surface of the tube body 1; when pressing the pressing part 7 at the tail end of the needle body 5, it is convenient for the medical staff's fingers (index finger and middle finger) to clamp the tube body 1.

[0030] In this embodiment, an additional vacuum tank 9 is provided on the side of the tube body 1, and the additional vacuum tank 9 is connected to the vacuum chamber 3 inside the tube body 1; the additional vacuum tank 9 can increase the volume of the vacuum chamber 3 inside the tube body 1 so as to collect and accommodate more blood samples; the material of the tube body 1 and the additional vacuum tank 9 is transparent plastic, which is convenient for intuitively observing the internal conditions of the tube body 1 and the additional vacuum tank 9.

[0031] In this embodiment, a protective sleeve 16 is provided on the periphery of the tail end of the needle body 5, and the protective sleeve 16 is plug-connected with the end of the tube body 1; when the outer packaging bag is unopened, the pressing part 7 at the tail end of the needle body 5 is prevented from being pressed accidentally.

[0032] The blood sample collector of this embodiment is individually packaged in a packaging bag;

[0033] In the initial state, the tip of the needle body 5 is located in the vacuum chamber 3, the tip of the needle body 5 does not pass through the first sealing rubber plug 2, the through hole 6 on the needle body 5 is located in the second sealing rubber plug 4, and the second sealing rubber plug 4 has a sealing effect on the through hole 6. Under the joint sealing effect of the first sealing rubber plug 2 and the second sealing rubber plug 4, the vacuum chamber 3 inside the tube body 1 maintains a vacuum state;

[0034] When collecting a blood sample, first unplug the protective sleeve 16, and connect the plug slot 10 at the front end of the tube body 1 to the sampling port 21 on the hemodialysis circuit tube 20; then hold the hemodialysis circuit tube 20 with your left hand, clamp the tube body 1 with the index finger and middle finger of your right hand, and press the pressing part 7 at the tail end of the needle body 5 with your right thumb. Under the pressing action, the spring 8 is compressed, and the needle body 5 moves forward. The tip of the needle body 5 passes through the second annular partition 12, the first sealing rubber plug 2 and the first annular partition 11 in turn and then pierces into the sampling port 21. At this time, the needle body The through hole 6 on 5 is located in the vacuum chamber 3, and the vacuum chamber 3 is connected with the sampling port 21 through the needle body 5. Under the negative pressure of the vacuum chamber 3, the blood inside the sampling port 21 flows into the vacuum chamber 3; after the negative pressure of the vacuum chamber 3 ends, the thumb of the right hand is released, and the spring 8 releases the elastic force. Under the elastic force of the spring 8, the needle body 5 moves backward and returns to the initial state. At this time, the vacuum chamber 3 is in a closed state, and the collected blood sample is stored in the vacuum chamber 3; finally, the tube body 1 is separated from the sampling port 21 to complete the blood sample collection process.

[0035] This embodiment has the following advantages:

[0036] (1) A plug-in slot is provided at the front end of the tube body, through which the tube body and the sampling port on the hemodialysis circuit tube can be quickly connected, while ensuring that the needle body can accurately penetrate the sampling port;

[0037] (2) The needle is inserted into the sampling port by pressing, and the insertion depth of the needle can be limited, effectively preventing the needle from penetrating the hemodialysis circuit tube;

[0038] (3) Rapid collection of blood samples is achieved, and the collection process is simple and convenient. In addition, during use, the tip of the needle is not exposed, and there is no risk of being stabbed by the tip of the needle.

[0039] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present utility model, it should be noted that: unless otherwise clearly stipulated and limited, the terms "installation", "connection", "setting" and "formation" should be understood in a broad sense; for example: it can be a fixed connection, setting, or a detachable connection, setting, or an integrated structure; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements; for those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A blood sample collector for a hemodialysis room, characterized in that: It comprises a cylindrical tube body, wherein a first annular baffle, a second annular baffle, a third annular baffle and a fourth annular baffle are sequentially arranged inside the tube body along the axial direction of the tube body, a first sealed cavity is formed between the first annular baffle and the second annular baffle, and a first sealing rubber plug is arranged inside the first sealed cavity, a vacuum cavity is formed between the second annular baffle and the third annular baffle, a second sealed cavity is formed between the third annular baffle and the fourth annular baffle, and a second sealing rubber plug is arranged inside the second sealed cavity; a needle body is arranged inside the tube body, and a through hole is arranged on the needle body; in an initial state, the tip of the needle body is located in the vacuum cavity, and the tail end of the needle body is located outside the tube body after sequentially passing through the third annular baffle, the second sealing rubber plug and the fourth annular baffle, and the through hole on the needle body is located in the second sealing rubber plug, a pressing portion is arranged at the tail end of the needle body, and a spring is sleeved on the needle body between the pressing portion and the fourth annular baffle.

2. A blood sample collector for a hemodialysis room according to claim 1, characterized in that: The inside of the tube body outside the first annular partition forms a plug-in groove, and the plug-in groove is used to connect with the sampling port on the hemodialysis circuit tube.

3. The blood sample collector for hemodialysis room according to claim 1, characterized in that: A flange structure is arranged on the outer circumferential surface of the tube body close to the fourth annular partition.

4. The blood sample collector for hemodialysis room according to claim 1, characterized in that: An additional vacuum tank is arranged on the side of the tube body, and the additional vacuum tank is communicated with the vacuum cavity inside the tube body.

5. A blood sample collector for a hemodialysis room according to claim 4, characterized in that: The tube body and the additional vacuum tank are made of transparent plastic.

6. The blood sample collector for hemodialysis room according to claim 1, characterized in that: The needle body is provided with a plurality of through holes.

7. The blood sample collector for hemodialysis room according to claim 1, characterized in that: A protective sleeve is arranged on the periphery of the tail end of the needle body, and the protective sleeve is plug-connected with the end of the tube body.

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