Blood collection device

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a blood collection instrument which comprises a needle cylinder, a needle head detachably connected to the free end of the needle cylinder and a piston rod connected to the interior of the needle cylinder, the end, close to the needle head, of the piston rod is connected with a sealing plug, and the side, close to the needle cylinder, of the needle head is connected with an auxiliary block. An insertion groove matched with the needle head is formed in the middle of the auxiliary block, the needle head penetrates through the insertion groove to be connected with the needle cylinder, and a storage groove used for storing a rubber plug is integrated in the side wall of the auxiliary block so that the rubber plug can be rapidly used for sealing the needle cylinder after blood sampling, and a blood sample can be prevented from making contact with air. By integrating the rubber plug storage groove on the auxiliary block, medical staff can directly take and use a needle cylinder from the auxiliary block and quickly seal the needle cylinder without additionally searching for the rubber plug after blood sampling is completed, the contact time of a blood sample and air is shortened, and the purity of the blood sample and the analysis accuracy are improved. Meanwhile, due to the design, the operation steps generated by finding the rubber plug are reduced, and the blood sampling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical instruments, and particularly relates to a blood collection instrument. BACKGROUND

[0002] The arterial blood collector is mainly used for collecting and primary preserving arterial blood samples so as to perform in-vitro diagnosis tests such as blood gas analysis, and the collected arterial blood samples can provide more accurate biochemical analysis data and physiological parameters to help doctors diagnose and treat diseases. The arterial blood collector mainly comprises a needle, a needle cylinder and a pusher device and a sealing plug. After collecting the blood sample, the needle needs to be pulled out of the needle cylinder, and the end of the needle cylinder far from the piston rod is immediately inserted into the rubber plug to prevent the blood sample from contacting air and to mix the blood. However, the medical staff needs to pull out the needle first and then take the rubber plug prepared in advance, and the position of the rubber plug cannot be guaranteed due to the need to prepare the rubber plug in advance, so that the blood still contacts air for a short time. SUMMARY

[0003] In view of the above problems, the utility model aims to provide a blood collection instrument to solve the problems in the background.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: a blood collection instrument, comprising a needle cylinder, a needle detachably connected to the free end of the needle cylinder, and a piston rod movably connected to the inside of the needle cylinder and having a sealing plug connected to the end close to the needle, the side of the needle close to the needle cylinder is detachably connected with an auxiliary block, the middle part of the auxiliary block is provided with a slot matched with the needle, the needle is connected with the needle cylinder through the slot, and the side wall of the auxiliary block is integrated with a storage groove for storing the rubber plug, so as to quickly use the rubber plug to close the needle cylinder after blood collection and prevent the blood sample from contacting air.

[0005] The utility model has the advantages that: by integrating the rubber plug storage groove on the auxiliary block, the medical staff does not need to find the rubber plug after blood collection, but can directly take the rubber plug from the auxiliary block, quickly close the needle cylinder, effectively reduce the time of contacting air, and improve the purity of the blood sample and the accuracy of analysis. At the same time, this design also reduces the operation steps caused by searching for the rubber plug and improves the blood collection efficiency.

[0006] In order to prevent the rubber plug from being exposed to air and being polluted by air:

[0007] As a further improvement of the above technical scheme: the auxiliary block is provided with a movable sealing cover covering the opening of the storage groove, which is used for protecting the rubber plug in the storage groove.

[0008] The beneficial effects of the improvement are that the needle can be threadedly connected with the auxiliary block, that is, an external thread is arranged at one end of the needle close to the needle cylinder, an internal thread is arranged in the insertion slot, the needle is aligned with the insertion slot and screwed into the insertion slot to realize the connection of the needle with the auxiliary block, of course, the needle and the auxiliary block can also adopt other connection modes, such as tight insertion, the storage groove can be arranged at the top, the bottom or the front and rear side walls of the auxiliary block, in order to facilitate the medical staff to open the sealing cover with one hand after blood sampling, the storage groove can be arranged at the top of the auxiliary block, an extended cover is arranged at one side of the sealing cover, when the medical staff pinches the front and rear side walls of the auxiliary block with the thumb and the middle finger, an upward external force is applied to the extended cover from the bottom of the extended cover by using the index finger, the sealing cover can be opened from the auxiliary block, and then the needle and the auxiliary block are pulled off from the needle cylinder, the needle cylinder is inserted into the rubber plug, and then the auxiliary block is moved away from the needle cylinder to realize the separation of the auxiliary block and the rubber plug, when the needle cylinder is inserted into the sealing plug with the insertion hole in the storage groove, the needle faces downward, and the safety of the medical staff can be maximally protected, the sealing plug is placed with the insertion hole facing outward, the needle cylinder is inserted, the sealing cover is turned to the auxiliary block, and the storage groove is covered, and the rubber plug can be prevented from being exposed to the air and being polluted by the air.

[0009] In order to fix the sealing cover and the auxiliary block together:

[0010] As a further improvement of the above technical solution, a lug is arranged at the free end of the sealing cover, and a groove for receiving the lug is arranged on the auxiliary block to lock or unlock the sealing cover.

[0011] The beneficial effects of the improvement are that when the sealing cover is closed, the lug is inserted into the groove, the lug is connected with the groove in a matched mode, the sealing cover cannot be opened from the auxiliary block without applying an external force, the sealing cover and the auxiliary block are fixed, and the rubber plug is covered.

[0012] In order to cover and protect the needle when the needle is not used:

[0013] As a further improvement of the above technical solution, a protective sleeve is movably connected to the side wall of the auxiliary block, and the protective sleeve is used to cover and protect the needle when the needle is not used.

[0014] The beneficial effects of the improvement are that the protective sleeve is not in the same plane as the storage groove, when the storage groove is at the top of the auxiliary block, the protective sleeve can be at the front and rear side walls of the auxiliary block, the medical staff can easily perform blood sampling, when the needle is used to perform arterial blood sampling on a patient, the protective sleeve is turned to a state perpendicular to the needle to avoid affecting blood sampling by the needle, when the needle is not used, the protective sleeve is reset to cover the outside of the needle to prevent the needle from injuring the medical staff and to avoid cross infection.

[0015] In order to better fit the shape of the needle and provide effective protection:

[0016] As a further improvement to the above technical solution: the protective sleeve is designed to be non-linear and semi-closed to better fit the shape of the needle and provide effective protection.

[0017] The beneficial effects of this improvement are: the protective sleeve can be arc-shaped or zigzag-shaped, and it has an entrance on one side and an internal cavity for accommodating the needle. It is a semi-closed shell, which makes it easy to cover the needle after blood collection, so as to better fit the shape of the needle and provide effective protection.

[0018] To facilitate accurate reading and control of the collected blood sample volume by medical staff:

[0019] As a further improvement to the above technical solution: the outer wall of the syringe is provided with clear scale lines to facilitate medical staff to accurately read and control the amount of blood sample collected.

[0020] The beneficial effect of this improvement is that by setting graduation lines on the outside of the syringe, medical staff can accurately read and control the amount of blood sample collected. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the central sealing cover of this utility model in the open state;

[0022] Figure 2 This is an enlarged structural diagram of point A in this utility model;

[0023] Figure 3 This is a top view of the sealed cover in the closed state of this utility model.

[0024] Figure 4 This is a top cross-sectional view of the sealed cover in the closed state of this utility model.

[0025] Figure 5 This is a schematic diagram of the left-side cross-sectional structure of the sealed cover in the present invention.

[0026] In the diagram: 1. Syringe; 2. Needle; 3. Sealing plug; 4. Piston rod; 5. Auxiliary block; 6. Storage tank; 7. Sealing cap; 8. Extended flip cap; 9. Protrusion; 10. Groove; 11. Protective sleeve; 12. Cavity; 13. Scale line; 14. Slot. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0028] This utility model relates to an existing blood collection device, which mainly includes a syringe 1, a needle 2 detachably connected to the free end of the syringe 1, and a piston rod 4 movably connected inside the syringe 1, with a sealing plug 3 connected to the end near the needle 2. The piston rod 4 is pushed to the bottom and then pulled to a preset position (e.g., preset to 1.6ml for a 3ml arterial blood collection device, and preset to 0.6ml for a 1ml arterial blood collection device). The protective cap of the needle 2 is removed, and the artery (e.g., radial artery, femoral artery, etc.) is positioned. The blood collection device is generally inserted at a 45-90 degree angle to the skin. After the needle 2 enters the artery, blood naturally flows into the arterial blood collection device. When the blood level reaches the preset position, the arterial blood collection device is withdrawn. Sterile gauze is applied to the puncture site for 5-10 minutes to stop the bleeding. The needle 2 of the arterial blood collection device is vertically inserted into the rubber stopper, and the blood is inverted and mixed 5 times. The sample tube is rubbed by hand for 5 seconds to ensure complete action of the anticoagulant. The sample is immediately sent for analysis. The above is an introduction to the existing blood collection device.

[0029] As can be seen from the above, the existing blood collection device has the following defects when in use. After collecting the blood sample, the needle of the existing arterial blood collector needs to be removed from the syringe, and the end of the syringe away from the piston rod needs to be immediately inserted into the rubber stopper to prevent the blood sample from contacting the air and to mix the blood by inverting it. However, when medical staff insert the syringe into the rubber stopper, they need to remove the needle first and then take the pre-prepared rubber stopper. Because the rubber stopper needs to be prepared in advance, it is difficult to ensure the position of the rubber stopper, which causes the blood to still come into contact with the air for a short time. Based on the above problems, the present invention adopts the following improvement method to solve them.

[0030] like Figures 1-5 As shown, a blood collection device includes a syringe 1, a needle 2 detachably connected to the free end of the syringe 1, and a piston rod 4 movably connected inside the syringe 1, with a sealing plug 3 connected to the end of the piston rod 4 near the needle 2. An auxiliary block 5 is detachably connected to the side of the needle 2 near the syringe 1. A slot 14 adapted to the needle 2 is provided in the middle of the auxiliary block 5. The needle 2 passes through the slot 14 and connects to the syringe 1. A storage groove 6 for storing a rubber stopper is integrated into the side wall of the auxiliary block 5, allowing for rapid sealing of the syringe 1 with the rubber stopper after blood collection, preventing the blood sample from contacting air. By integrating the rubber stopper storage groove 6 into the auxiliary block 5, medical personnel do not need to search for the rubber stopper after blood collection; they can directly take it from the auxiliary block 5 to quickly seal the syringe 1, effectively reducing the time the blood sample is in contact with air, thereby improving the purity of the blood sample and the accuracy of analysis. At the same time, this design also reduces the operational steps required to find the rubber stopper, improving blood collection efficiency.

[0031] Furthermore, such as Figures 1-5As shown, the auxiliary block 5 is provided with a movable sealing cover 7. The needle 2 can be threadedly connected to the auxiliary block 5, that is, an external thread is provided at the end of the needle 2 near the syringe 1, and an internal thread is provided in the slot 14. The needle 2 is aligned with the slot 14 and screwed into the slot 14 to realize the connection between the needle 2 and the auxiliary block 5. Of course, the needle 2 and the auxiliary block 5 can also adopt other connection methods, such as tight insertion. The storage groove 6 can be set on the top, bottom or front and rear side walls of the auxiliary block 5. In order to facilitate medical staff to open the sealing cover 7 with one hand after blood collection, the storage groove 6 can be opened on the top of the auxiliary block 5. An extended flip cover 8 is provided on one side of the sealing cover 7. When the medical staff pinches the auxiliary block 5 with their thumb and middle finger, the storage groove 6 can be opened on the top of the auxiliary block 5. When the front and rear side walls of block 5 are exposed, use your index finger to apply an upward force to the bottom of the extended flip cover 8 to flip the sealing cover 7 off the auxiliary block 5. Then, pull the needle 2 and the auxiliary block 5 off the syringe 1 together, so that the syringe 1 is inserted into the rubber stopper. Then move the auxiliary block 5 away from the syringe 1 to separate the auxiliary block 5 from the rubber stopper. When inserting the syringe 1 into the sealing stopper 3 in the storage tank 6, the needle 2 should face down to maximize the safety of medical staff. Place the side of the sealing stopper 3 with the insertion hole facing outward to facilitate the insertion of the syringe 1. Flip the sealing cover 7 onto the auxiliary block 5 to cover the storage tank 6 to prevent the rubber stopper from being exposed to the air and contaminated by the air.

[0032] Furthermore, such as Figure 2 As shown, the free end of the sealing cap 7 is provided with a protrusion 9, and the auxiliary block 5 is provided with a groove 10 for receiving the protrusion 9. When the sealing cap 7 is closed, the protrusion 9 is driven to be inserted into the groove 10, and the protrusion 9 and the groove 10 are fitted together. When no external force is applied, the sealing cap 7 will not be flipped off from the auxiliary block 5, which is used to fix the sealing cap 7 and the auxiliary block 5 and cover the rubber stopper.

[0033] Furthermore, such as Figures 1-5 As shown, a protective sleeve 11 is movably connected to the side wall of the auxiliary block 5. The protective sleeve 11 and the storage tank 6 are not on the same plane. When the storage tank 6 is on the top of the auxiliary block 5, the protective sleeve 11 can be on the front and rear side walls of the auxiliary block 5, which facilitates blood collection by medical staff. When using the needle 2 to collect arterial blood from the patient, the protective sleeve 11 is flipped to a position perpendicular to the needle 2 to avoid affecting the blood collection by the needle 2. When not in use, the protective sleeve 11 is reset and covered on the outside of the needle 2 to prevent the needle 2 from pricking the medical staff and to avoid cross-infection.

[0034] Furthermore, such as Figures 1-5 As shown, the protective sleeve 11 is designed to be non-linear and semi-enclosed. The protective sleeve 11 can be arc-shaped or zigzag-shaped, and it has an entrance on one side. Inside, there is a cavity 12 for accommodating the needle 2. As a semi-enclosed shell, it can easily cover the needle 2 after blood collection to better fit the shape of the needle 2 and provide effective protection.

[0035] Furthermore, such as Figure 1 As shown, the outer wall of the syringe 1 is provided with clear scale lines 13 to facilitate medical staff to accurately read and control the amount of blood sample collected.

[0036] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the protection scope of this utility model.

Claims

1. A blood collection device, comprising a syringe (1), a needle (2) detachably connected to the free end of the syringe (1), and a piston rod (4) movably connected inside the syringe (1) and having a sealing plug (3) connected to one end near the needle (2), characterized in that: The needle (2) is detachably connected to an auxiliary block (5) on the side near the syringe (1). The auxiliary block (5) has a slot (14) in the middle that is compatible with the needle (2). The needle (2) passes through the slot (14) and is connected to the syringe (1). The side wall of the auxiliary block (5) is integrated with a storage groove (6) for storing rubber stoppers, so that the syringe (1) can be quickly sealed with rubber stoppers after blood collection to prevent the blood sample from contacting the air.

2. The blood collection device according to claim 1, characterized in that: The auxiliary block (5) is provided with a movable sealing cover (7), which covers the opening of the storage tank (6) and is used to protect the rubber plug inside the storage tank (6).

3. A blood collection device according to claim 2, characterized in that: The free end of the sealing cover (7) is provided with a protrusion (9), and the auxiliary block (5) is provided with a groove (10) for receiving the protrusion (9) so as to lock or unlock the sealing cover (7).

4. A blood collection device according to claim 1, characterized in that: The side wall of the auxiliary block (5) is also movably connected to a protective sleeve (11), which is used to cover and protect the needle (2) when it is not in use.

5. A blood collection device according to claim 4, characterized in that: The protective sleeve (11) is designed to be non-linear and semi-closed to better fit the shape of the needle (2) and provide effective protection.

6. A blood collection device according to claim 1, characterized in that: The outer wall of the syringe (1) is provided with clear scale lines (13) so that medical staff can accurately read and control the amount of blood sample collected.

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