A blood collection and infusion device

Abstract

The present invention relates to the technical field of medical devices, and specifically relates to a blood collection and infusion device, which includes a joint body, a connecting component, and a blood collection device. One end of the joint body is connected to the infusion end or the blood collection end. A cavity is provided inside the joint body, a pipe component is provided at the bottom of the cavity, and a thread is provided at the other end of the joint body. One end of the connecting component is provided with an interface that matches the thread of the joint body. Through the interface, the connecting component is connected to the joint body, and a delivery pipe is provided in the middle of the connecting component. The blood collection device is detachably connected to the connecting component. A blood return cavity is opened inside the blood collection device. The blood return cavity includes a first chamber, a second chamber, and a third chamber that are sequentially communicated. A needle is connected below the blood return cavity. The present invention ensures that the joint can complete two operations of blood sampling and infusion through a single needle insertion, reduces the pain caused to the patient by multiple needle insertions, and ensures that the joint can be disassembled and separated from both blood collection and storage, facilitating the operation of medical staff in clinical practice.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a blood collection and infusion device. Background Art

[0002] In clinical care, some tests require repeated blood sampling from patients and the need to connect a blood collection needle. Throughout the operation, the risk of needle stick injuries and the workload of medical staff are increased. Additionally, repeated punctures increase patient pain and the risk of infection. Many patients also need to be infused while having their blood drawn.

[0003] The situation of repeated blood sampling and infusion is relatively common in clinics nowadays. And the existing connectors currently need to be re-punctured. Due to the structural design reasons, most of them are integrated structures, and it is impossible to disassemble the connector and the blood collection device at will. When switching between blood sampling and infusion operations, re-puncturing is required, which will cause pain to the patient; at the same time, it causes inconvenience to medical staff during clinical operations. Considering the above problems, it is urgently necessary to make changes to it. Summary of the Invention

[0004] The purpose of the present invention is to provide a blood collection and infusion device, including a connector body, a connecting component, and a blood collection device. One end of the connector body is connected to the infusion end or the blood collection end. A cavity is provided inside the connector body, and a pipe part is provided at the bottom of the cavity. The other end of the connector body is provided with a thread; one end of the connecting component is provided with an interface that matches the thread of the connector body. Through the interface, the connecting component is connected to the connector body, and a delivery pipe is provided in the middle of the connecting component; the blood collection device is detachably connected to the connecting component, and a blood return cavity is provided inside the blood collection device. The blood return cavity includes a first chamber, a second chamber, and a third chamber that are connected in sequence. A needle is connected below the blood return cavity, and the needle is made of plastic material.

[0005] Optionally, when the interface is tightened, the delivery pipe is connected to the pipe part, and when the interface is unscrewed, the delivery pipe is separated from the pipe part.

[0006] Optionally, an anti-slip block is provided on the outer wall of the connector body. The outer wall of the anti-slip block is provided with an anti-slip concave surface, and the surface of the anti-slip block is engraved with a herringbone anti-slip pattern.

[0007] Optionally, the interface includes an installation component. The installation component includes an external thread cylinder, a sliding ring, a pressing member, a connecting plate, and an installation spring. The sliding ring is slidably connected to the side wall of the connecting component in a matching manner, and the external thread cylinder is inserted into the inner wall of the connecting component and fixedly connected to the top of the sliding ring.

[0008] Optionally, the pressing member is slidably connected to the groove of the connecting component. The connecting plate is fixedly connected to the side wall of the pressing member. The connecting plate is slidably connected to the cavity of the side wall in a matching manner. The installation spring is installed between one end of the connecting plate and one end of the cavity of the side wall.

[0009] Optionally, a first hole is provided in the side wall of the first chamber, and a second hole is provided in the side wall of the third chamber. The first chamber, the second chamber, and the third chamber are communicated through the first hole and the second hole. The first chamber, the second chamber, the third chamber, and the blood return chamber are all made of transparent materials. When blood flows into the blood return chamber, it flows through the first chamber, the second chamber, and the third chamber in sequence.

[0010] Optionally, a spiral connecting portion is provided below the blood return chamber. The spiral connecting portion is connected to a needle holder, and the needle holder is connected to a needle.

[0011] Optionally, a protective cover is installed on the outer wall of the needle. The protective cover is a silicone cover, its cross-section is circular, and its length is greater than the length of the needle.

[0012] Optionally, the pipe fitting and the delivery pipe are both parts of the needle, and the needle penetrates through the entire blood collection and infusion device.

[0013] Optionally, a through hole is provided in the pipe fitting, and an openable and closable diaphragm is provided in the through hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. In the present invention, the needle is inserted into the blood collection test tube. At this time, the delivery pipe is connected to the pipe fitting, and the blood return chamber is checked to confirm whether there is blood return. If there is blood return, it can be seen that the blood flows from the joint body to the connecting component and then is introduced into the blood collection test tube to complete blood drawing and blood sample collection; when infusion is required, hold the anti-slip block and rotate it counterclockwise to separate the joint body from the connecting component. At this time, connect the pipe fitting of the joint body to the cannula for infusion, ensuring that the joint can complete two operations of blood sampling and infusion through one needle insertion, reducing the pain caused to the patient by multiple needle insertions, and ensuring that the joint can be disassembled and separated from both blood collection and infusion, facilitating the operation of medical staff in clinical practice.

[0016] 2. In the present invention, a plurality of anti-slip blocks are provided on the outer wall of the joint body, and the outer wall of the anti-slip block is provided with anti-slip concave surfaces. The anti-slip concave surfaces are arc-shaped. When holding the anti-slip block, the fingers can fit into the anti-slip concave surfaces, which is convenient for holding. The surface of the anti-slip block is engraved with herringbone anti-slip patterns, which can increase the friction between the fingers and the anti-slip block, thus avoiding slipping when holding.

[0017] 3. In the present invention, when blood flows into the blood return chamber, the blood flows into the second chamber through the first hole. When there is a certain amount of blood in the second chamber, it can flow into the third chamber through the second hole. The first chamber, the second chamber, the third chamber, and the blood return chamber are all made of transparent materials. When blood flows into the blood return chamber, it flows through the first chamber, the second chamber, and the third chamber in sequence. During operation, it can be visually judged whether there is blood flowing in, and thus it can be judged whether the needle at the blood end is in the blood vessel. Brief Description of the Drawings

[0018] Figure 1 is a structural sectional view of the present invention;

[0019] Figure 2 is a structural sectional view of the joint body of the present invention;

[0020] Figure 3 is a structural sectional view of the connecting component of the present invention;

[0021] Figure 4 is the present invention Figure 3 enlarged view of part A in;

[0022] Figure 5 is a structural sectional view of the blood collection device of the present invention.

[0023] Description of the reference numerals in the drawings:

[0024] 1. Joint body; 2. Connecting component; 3. Blood collection device; 4. Cavity; 7. Anti-slip block; 8. Pipe fitting; 9. Through hole; 10. Sealing ring; 11. Thread; 121. External thread cylinder; 122. Sliding ring; 123. Pressing member; 124. Connecting plate; 125. Mounting spring; 13. Delivery pipe; 131. Channel; 14. Fitting ring; 15. Blood return cavity; 151. First chamber; 152. Second chamber; 153. Third chamber; 1501. First hole; 1502. Second hole; 16. Fitting thread; 17. Needle; 18. Protective cover; 19. Outer shell; 20. Handle.

[0025] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-5 , the present invention provides a blood collection / infusion device, including a joint body 1, a connecting component 2 and a blood collection device 3. The joint body 1 is used to connect the infusion end (inputting drugs) or the blood collection end (collecting blood). The joint body 1 and the connecting component 2 are detachably connected. The connecting component 2 is used to connect the blood collection device 3 to the joint body 1.

[0028] As Figure 1As shown, the upper end of the connector body 1 can be connected to the infusion end or the blood collection end. A cavity 4 is provided inside the connector body 1 for storing the drug at the infusion end or the blood at the blood collection end. A pipe member 8 is provided at the bottom of the cavity 4. The drug input from the infusion end or the blood input from the blood collection end can be transported through the pipe member 8. The inner wall of the lower end of the connector body 1 is provided with a thread 11 for threaded connection with the connecting member 2, and the connecting member 2 is further connected to the blood collection device 3.

[0029] As Figure 1 and Figure 2 shown, a plurality of anti-slip blocks 7 are provided on the outer wall of the connector body 1, and the outer wall of the anti-slip block 7 is provided with an anti-slip concave surface, which is an arc surface; when holding the anti-slip block 7, the fingers can fit into the anti-slip concave surface, so as to facilitate gripping. The surface of the anti-slip block 7 is engraved with herringbone anti-slip lines, which can increase the friction between the fingers and the anti-slip block 7, thereby avoiding slipping during gripping. In some embodiments, the cross-section of the anti-slip block 7 perpendicular to the length direction of the blood collection / infusion connector is circular.

[0030] In some embodiments, a through hole 9 is provided at an eccentric position in the middle of the pipe member 8, and the cavity 4 can achieve the transportation of liquid or blood through the through hole 9.

[0031] A delivery pipe 13 is provided in the middle of the connecting member 2. A channel 131 is provided in the delivery pipe 13.

[0032] The top of the connecting member 2 is provided with an interface matching the thread 11 of the connector body 1 for connecting the connecting member 2 and the connector body 1. In some embodiments, the interface at the top of the connecting member 2 is provided with an external thread, which matches the thread 11. When the interface is tightened (for example, rotating the connecting member 2 clockwise so that the external thread of the top interface of the connecting member 2 is fully engaged with the thread 11 of the connector body 1), at this time, the delivery pipe 13 is connected to the pipe member 8, and blood collection can be carried out through the blood collection device 3. When the interface is unscrewed (for example, rotating the connecting member 2 counterclockwise so that the external thread of the top interface of the connecting member 2 is completely disengaged from the thread 11 of the connector body 1), at this time, the delivery pipe 13 is separated from the pipe member 8, and infusion is carried out by connecting an infusion needle (for example, a cannula) to the pipe member 8 at the lower end of the connector body 1 through a hose.

[0033] In some embodiments, refer to Figure 3 、 Figure 4, the interface of the connecting component 2 described above may include an installation component, and the installation component includes an external thread cylinder 121, a sliding ring 122, a pressing member 123, a connecting plate 124, and an installation spring 125. The sliding ring 122 is slidably connected to the side wall of the connecting component 2 in a matching manner. The external thread cylinder 121 is inserted into the inner wall of the connecting component 2 and fixedly connected to the top of the sliding ring 122. The pressing member 123 is slidably connected to the groove of the connecting component 2. The connecting plate 124 is fixedly connected to the side wall of the pressing member 123. The connecting plate 124 is slidably connected to the cavity of the side wall in a matching manner. The installation spring 125 is installed between one end of the connecting plate 124 and one end of the cavity of the side wall. The delivery pipe 13 is matched with the inside of one end of the pipe member 8. The position of the channel 131 in the delivery pipe 13 is the same as that of the through hole 9 in the pipe member 8. A sealing ring 10 is installed at one end inside the pipe member 8, and the sealing ring 10 supports one end of the delivery pipe 13. The sealing ring 10 is used to make the connection more reliable and prevent liquid leakage. By pressing the pressing member 123, during which the installation spring 125 is compressed, and then the pressing member 123 supports on the side wall of the sliding ring 122, so that the sliding ring 122 and the connecting component 2 are in a fixed state. Align the external thread cylinder 121 with the thread 11, and at the same time, align the delivery pipe 13 with the pipe member 8, and then perform thread installation. When the delivery pipe 13 supports on the inner side end of the pipe member 8, no further tightening is performed. At this time, the connecting component 2 can rotate between the sliding ring 122 sliding inside it and the joint body 1, so that the position of the butt joint of the through hole 9 can be changed, and the through hole 9 can butt against the end face of the delivery pipe 13 to prevent the flow of liquid.

[0034] In some embodiments, the connecting component 2 is detachably connected to the blood collection device 3. In other embodiments, the connecting component 2 and the blood collection device 3 are an integral body (i.e., an integrated structure) and are not detachable.

[0035] For example, a fitting thread 16 that is matched and connected to the connecting component 2 (for example, the delivery pipe 13) is provided on the upper side wall of the blood collection device 3. A corresponding thread structure is provided on the inner wall of the lower end of the delivery pipe 13. The detachable connection between the connecting component 2 and the blood collection device 3 is realized through the fitting thread 16 and the corresponding thread structure on the inner wall of the lower end of the delivery pipe 13.

[0036] Inside the blood collection device 3, there is a blood return chamber 15. The blood return chamber 15 includes a first chamber 151, a second chamber 152, and a third chamber 153 that are connected in sequence. When blood flows into the blood return chamber 15, it first flows into the first chamber 151. A first hole 1501 is provided on the side wall of the first chamber 151. A second hole 1502 is provided on the side wall of the third chamber 153. The first chamber 151, the second chamber 152, and the third chamber 153 are connected through the first hole 1501 and the second hole 1502. Blood flows into the second chamber 152 through the first hole 1501. When there is a certain amount of blood in the second chamber 152, it can flow into the third chamber 153 through the second hole 1502. The first chamber 151, the second chamber 152, the third chamber 153, and the blood return chamber 15 are all made of transparent materials. When blood flows into the blood return chamber 15, it flows through the first chamber 151, the second chamber 152, and the third chamber 153 in sequence. During operation, it can be visually judged whether there is blood flowing in, and thus it can be judged whether the needle at the blood end is in the blood vessel. The blood return chamber 15 is connected to a needle 17 below. In some embodiments, a screw connection portion (for example, an external thread) is provided below the blood return chamber 15. The screw connection portion can be matched with the internal thread of the needle holder to connect the needle holder. The needle 17 is connected through the needle holder.

[0037] Refer to Figure 1 , a protective cover 18 is installed on the outer wall of the needle 17. The protective cover 18 is a silicone sleeve structure, which can separate the needle 17 from the outside. On the one hand, it can prevent the needle 17 from being damaged by collision, and on the other hand, it can also avoid the surface of the needle 17 from adhering to dust and causing infection. The cross-section of the protective cover 18 is circular, the length is greater than the length of the needle 17, and the inner diameter of the protective cover 18 is equal to the outer diameter of the threaded end of the screw connection portion, so as to fix the protective cover 18 on the needle 17. An outer shell 19 is also provided outside the needle 17 to protect the needle 17 and avoid contamination and prevent needle stick injuries to patients and medical workers.

[0038] The cross-section of the outer shell 19 is circular and conforms to the lower end of the connecting component 2. In some embodiments, a fitting ring 14 is provided at the bottom of the connecting component 2, and the connecting component 2 is fitted and connected to the outer shell 19 through the fitting ring 14. In some embodiments, there is a thread inside the outer shell 10, which is matched with the screw connection portion under the blood return chamber 15.

[0039] In practical applications, a handle 20 also extends out from the top of the outer shell 19. The handle 20 is an arc structure for medical staff to hold to avoid needle stick injuries.

[0040] In some embodiments, the pipeline member 8 and the delivery tube 13 are both parts of the needle 17, and the needle 17 penetrates the entire blood collection and infusion device. The needle 17 is made of a high-hardness and sharp plastic material, so a needleless configuration can be achieved.

[0041] In some embodiments, a diaphragm is disposed in the through hole 9 inside the pipe fitting 8 to prevent blood from flowing out and liquid from flowing back. The diaphragm is composed of at least two parts. The diaphragm is disposed on the side of the lower end of the through hole 9 close to the delivery pipe 13. The outer diameter of the delivery pipe 13 is smaller than the inner diameter of the through hole 9 and its length is longer. When the joint body 1 is connected to the connecting component 2, the delivery pipe 13 is inserted into the through hole 9. At this time, at least two parts of the diaphragm are squeezed by the delivery pipe 13 and fit or approach the inner wall of the through hole 9, so that the through hole 9 is communicated with the channel 131. When the joint body 1 is separated from the connecting component 2, the delivery pipe 13 is withdrawn from the through hole 9. At least two parts of the diaphragm return to the original closed state due to elastic action, closing the lower end of the through hole 9 to prevent blood from flowing out and liquid from flowing back. The diaphragm can be made of a material with good elasticity, such as plastic, rubber, resin, etc.

[0042] The working process and principle of the present invention: When blood collection is required, the outer shell 19 is removed, the needle holder is connected to the spiral connection part below the blood return cavity 15, the needle 17 is inserted into the blood collection test tube, and the anti-slip block 7 is held by hand and rotated clockwise to tighten the interface provided at the top of the connecting component 2. At this time, the delivery pipe 13 is connected to the pipe fitting 8, and the blood return cavity 15 is checked to confirm whether there is blood return. If there is blood return, it can be seen that the blood flows through the joint body 1 to the connecting component 2 and then is introduced into the blood collection test tube to complete blood drawing and blood sample collection; when infusion is required, the anti-slip block 7 is held by hand and rotated counterclockwise to separate the joint body 1 from the connecting component 2. At this time, the pipe fitting 8 of the joint body 1 is connected to a cannula for infusion.

[0043] The above content is a further detailed description of the present invention in combination with specific embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope determined by the claims submitted for the present invention.

Claims

1. A blood collection and infusion device, comprising a connector body (1), a connecting component (2) and a blood collection device (3), characterized in that: One end of the connector body (1) is connected to the infusion end or the blood collection end. A cavity (4) is provided inside the connector body (1). A pipe member (8) is provided at the bottom of the cavity (4). The other end of the connector body (1) is provided with a thread (11); One end of the connecting component (2) is provided with an interface matching the thread (11) of the connector body (1). Through the interface, the connecting component (2) is connected to the connector body (1). A delivery pipe (13) is provided in the middle of the connecting component (2); The blood collection device (3) is detachably connected to the connecting component (2). A blood return cavity (15) is formed inside the blood collection device (3). The blood return cavity (15) includes a first chamber (151), a second chamber (152) and a third chamber (153) that are connected in sequence. A needle (17) is connected below the blood return cavity (15). The needle (17) is made of plastic; A protective sleeve (18) is installed on the outer wall of the needle (17). The protective sleeve (18) is a silica gel sleeve, with a circular cross-section and a length greater than that of the needle (17); Both the pipe member (8) and the delivery pipe (13) are part of the needle (17). The needle (17) penetrates through the entire blood collection and infusion device; A through hole (9) is provided inside the pipe member (8), and a switchable diaphragm is provided in the through hole (9); A first hole (1501) is provided on the side wall of the first chamber (151), and a second hole (1502) is provided on the side wall of the third chamber (153). The first chamber (151), the second chamber (152) and the third chamber (153) are connected through the first hole (1501) and the second hole (1502); The first chamber (151), the second chamber (152), the third chamber (153) and the blood return cavity (15) are all made of transparent material. When blood flows into the blood return cavity (15), it flows through the first chamber (151), the second chamber (152), and the third chamber (153) in sequence; A spiral connection part is provided below the blood return cavity (15). The spiral connection part is connected to a needle holder, and the needle (17) is connected through the needle holder.

2. The blood collection and infusion device according to claim 1, wherein: When the interface is tightened, the delivery pipe (13) is connected to the pipe member (8). When the interface is unscrewed, the delivery pipe (13) is separated from the pipe member (8).

3. The blood collection and infusion device according to claim 1, characterized in that: An anti-slip block (7) is provided on the outer wall of the connector body (1). The outer wall of the anti-slip block (7) is provided with an anti-slip concave surface, and the surface of the anti-slip block (7) is engraved with a herringbone anti-slip pattern.

4. The blood collection and infusion device according to claim 1, characterized in that: The interface includes an installation component. The installation component includes an external thread cylinder (121), a sliding ring (122), a pressing member (123), a connecting plate (124) and an installation spring (125). The sliding ring (122) is slidably connected to the side wall of the connecting component (2). The external thread cylinder (121) is inserted into the inner wall of the connecting component (2) and fixedly connected to the top of the sliding ring (122).

5. The blood collection and infusion device according to claim 4, characterized in that: The pressing member (123) is slidably connected in the groove of the connecting member (2). The connecting plate (124) is fixedly connected to the side wall of the pressing member (123). The connecting plate (124) is slidably connected in a matching manner in the cavity of the side wall. The mounting spring (125) is mounted between one end of the connecting plate (124) and one end of the cavity of the side wall.

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