Blood collecting device

Abstract

The utility model discloses a blood collecting device which comprises a blood collecting part and a blood collecting part which are independently arranged and detachably connected. The blood taking component comprises a blood taking needle assembly, a first blood transfusion tube connected to the tail end of the blood taking needle assembly and a first connecting assembly connected to the other end of the first blood transfusion tube; the blood collection component comprises a blood collection bag assembly, a second blood transfusion tube connected to the inlet end of the blood collection bag assembly and a second connecting piece arranged at the other end of the second blood transfusion tube, the first connecting piece and the second connecting piece can be connected in a sealed and pluggable mode, and the first blood transfusion tube and the second blood transfusion tube are communicated during connection. After blood collection, the blood collection component can be directly separated from the blood collection component, and the blood collection component is connected with the blood collection tube, so that blood can be collected and tested at one time, the work of storing a blood bag after blood collection is simplified, and the blood collection operation is safer and more convenient.

Description

Technical Field

[0001] The utility model relates to a blood collection device, belonging to a medical auxiliary device. Background Art

[0002] The existing blood collection devices are generally of an integrated structure, that is, the blood collection needle, the blood transfusion tube and the blood collection bag are connected as an integrated structure. When in use, the blood collection needle is used to pierce the blood vessel of the blood donor, and the blood enters the blood collection bag through the blood transfusion tube. After completion, the blood transfusion tube is thermally melted and cut off from the end of the blood collection bag, so that the blood in the blood bag can be stored in a sealed manner. At the same time, in order to detect the blood, it is also necessary to thermally melt and cut off the blood transfusion tube on the side close to the blood collection needle, so as to perform blood test on a part of the blood flowing in the middle blood transfusion tube.

[0003] CN204192629U discloses a blood collection device, which includes: a blood collection needle, a blood transfusion tube communicated with the blood collection needle, a blood collection bag communicated with the blood transfusion tube, and a blood output port. It also includes a transfer bag, and the transfer bag is seamlessly connected with the blood collection bag. That is, its blood collection needle, blood transfusion tube and blood bag are of an integrated structure, and the problems thereof are as follows: First, when the blood bank collects and tests the blood, it is necessary to thermally melt both sides of the blood transfusion tube to leave the blood for testing, and the operation is complicated; Second, if preoperative self-blood collection of patients is implemented, this integrated structure cannot directly draw blood for testing, so additional venous blood collection is required, that is, multiple needle punctures for blood collection are required. Third, the blood collection needles are all rigid needles. During the blood collection process, it is easy to pierce the blood vessels of the patients, which is not convenient for the patients to move. When the patients move, it is easy to pierce the blood vessel wall with the needle, resulting in extravasation. Fourth, the blood transfusion socket on the existing blood bag includes two connecting columns made of soft plastic. The connection between the outer connecting column and the lower connecting column can be manually twisted off. There is a sealing partition in the lower connecting column, and the user can puncture and insert it through the needle to communicate with the inside of the blood bag for blood transfusion. The problem thereof is that, because it is made of soft plastic, it is easy to be punctured, and all the blood can only be transfused at one time, and it cannot be transfused in multiple times.

[0004] Therefore, a blood collection device that overcomes the defects of the above-mentioned existing blood collection devices and is safe and convenient for blood collection operation has become the goal pursued by those skilled in the art. Summary of the Invention

[0005] The purpose of the utility model is to solve the above problems of the integrated structure of the needle, tube and bag of the existing blood collection device.

[0006] To achieve the above object, the technical solution adopted by the present utility model is as follows: a blood collection device, characterized in that it comprises: a blood collection component and a blood collection component independently arranged, the blood collection component is detachably connected to the blood collection component; the blood collection component includes a blood collection needle assembly, a first blood transfusion tube connected to the tail end of the blood collection needle assembly, and a first connector connected to the other end of the first blood transfusion tube; the blood collection component includes a blood collection bag assembly, a second blood transfusion tube connected to the inlet end of the blood collection bag assembly, and a second connector arranged at the other end of the second blood transfusion tube, the first connector and the second connector can be hermetically plugged and unplugged, and when connected, the first blood transfusion tube and the second blood transfusion tube are communicated.

[0007] As a preferred solution, wherein, the first connector includes: a blood collection needle seat fixedly connected to the end of the first blood transfusion tube, a blood collection needle installed at the end of the blood collection needle seat, and a rubber sleeve with a closed front end sleeved on the outer surface of the blood collection needle; the second connector includes a connecting seat, the connecting seat is in a cylindrical hollow shape, the top end of the connecting seat has an opening smaller than the inner diameter of the connecting seat, and the tail end of the connecting seat is fixedly connected to the second blood transfusion tube, a rubber plug is arranged in the connecting seat for closing the end of the connecting seat; when the blood collection needle pierces the rubber sleeve and the rubber plug, the first blood transfusion tube and the second blood transfusion tube are communicated.

[0008] As a preferred solution, wherein, the rubber plug is arranged at the front end of the cavity of the connecting seat, and an annular boss with a wedge-shaped cross section for limiting the rubber plug at the front end of the cavity is arranged on the inner surface of the wall plate of the connecting seat; the rubber plug includes a rubber plug front part and a rubber plug rear part with a stepped outer circle connected together, the diameter of the rubber plug front part is larger than the inner diameter of the annular boss and is in sealing fit with the inner surface of the cavity, and the diameter of the rubber plug rear part is less than or equal to the minimum diameter of the annular boss.

[0009] As a preferred solution, wherein, a hemispherical recess is arranged at the top end of the rubber plug; the rubber plug front part is in a conical shape with a small front end and a large rear end.

[0010] As a preferred solution, wherein, the blood collection needle assembly includes a puncture needle head, a retention hose sleeved on the puncture needle head, the tail end of the retention hose is connected to the front end of a hollow hose seat, a sealing plug is arranged inside the hose seat, the sealing plug is in sealing fit with the inner side wall of the hose seat, the puncture needle head passes through the sealing plug and is arranged inside the retention hose, a branch pipe seat for connecting the first blood transfusion tube is arranged at the side wall position of the hose seat in front of the sealing plug, a safety seat is arranged at the rear end of the hose seat, the front end of the safety seat is inserted into the rear end of the hose seat, the rear end of the safety seat has a cylindrical guiding section, the tail end of the puncture needle head is fixedly installed on a needle seat, the needle seat has a hole for cooperating with the guiding section, and the needle seat can be inserted and pulled out on the guiding section.

[0011] As a preferred solution, a wing is provided on the outer side wall of the needle holder, and a needle cap is provided outside the puncture needle and the retention hose.

[0012] As a preferred solution, the blood collection bag component includes a bag-shaped blood collection bag body. At the top of the blood collection bag body, a blood collection interface fixedly connected to the second blood transfusion tube and an anticoagulant injection port for injecting anticoagulant are provided; at the bottom or top of the blood collection bag body, a first blood transfusion interface plugged with a blood transfusion needle and / or a second blood transfusion interface using a spiral needleless connection method are provided.

[0013] As a preferred solution, suspension rings are provided at the middle positions of both the upper and lower ends of the blood collection bag body.

[0014] As a preferred solution, the first blood transfusion interface includes: a connection seat one made of hard plastic and heat-melted to the bottom of the blood collection bag body. The connection seat one includes a tubular connection seat body, an outlet seat one in the shape of a circular disc integrated with the connection seat one at the end of the connection seat body. At the upper end of the outlet seat one, a first upper cover is provided. The first upper cover has an opening one smaller than the outer diameter of its outer wall. Inside the first upper cover, a rubber sealing cover is provided. At the opening at the top of the first upper cover, an easy-pull sealing cover is provided, and a pull ring is provided on the easy-pull sealing cover.

[0015] As a preferred solution, the connection seat one further includes a connection part one connected to the other end of the connection seat body and used for heat-melting connection to the bottom of the blood collection bag body. The cross-section of the connection part one is in the shape of a hollow rhombic prism.

[0016] As a preferred solution, a ring-shaped wedge-shaped protrusion is provided on the inner wall of the first upper cover. The rubber sealing cover is limited to the front end of the first upper cover by the wedge-shaped protrusion; circular concave portions are provided on the front and rear end faces of the rubber sealing cover.

[0017] As a preferred solution, the second blood transfusion interface includes a tubular connection seat two made of hard plastic and heat-melted to the bottom of the blood collection bag body and a cylindrical threaded connection port with external threads integrally formed on the connection seat two. The diameter of the connection seat two is larger than the diameter of the threaded connection port. A sealing plug is provided inside the threaded connection port. The sealing plug has an opening two that is in a closed state in its natural state, and a threaded end cover is provided outside the threaded connection port.

[0018] As a preferred embodiment, the sealing plug includes an outer flange and an inner flange that block the outer end face and the inner end face of the threaded connection port. The inner flange and the outer flange are both provided with an opening two that is in a closed state in the natural state. The inner flange and the outer flange are connected by a flat ring-shaped sealing tube. The channel of the sealing tube communicates with the opening two on the inner flange and the outer flange.

[0019] As a preferred embodiment, the tail end of the second connecting seat has a connecting portion two that is tubular or flat tubular with a smaller diameter at the front end and is used for heat melting connection with the bottom of the blood collection bag body.

[0020] As a preferred embodiment, the blood collection component further includes a blood collection tube.

[0021] For the blood collection device of the present utility model, by setting the blood collection component and the blood collection component as two independent parts, during use, they can be hermetically plugged and unplugged through the first connecting piece and the second connecting piece, and then they can be combined into a whole for blood collection. After blood collection, the first connecting piece and the second connecting piece can be directly separated. After separation, the end of the second connecting piece can return to the closed state and can be directly transported and stored. Blood for blood bank testing can be directly extracted from the end of the second connecting piece. Therefore, there is no need to heat melt both sides of the blood transfusion tube like existing blood collection devices to leave blood for testing. Thus, the blood collection device of the present utility model is simple to operate. At the same time, if it is for preoperative blood collection by the patient himself, after directly pulling out the blood collection component, the first connecting piece can be connected to the blood collection tube to extract blood for testing, without the need for additional intravenous blood collection, that is, without multiple needle insertions for blood collection.

[0022] The present utility model further designs the blood collection needle as an indwelling needle that can be reserved in the blood vessel, which overcomes the problem that the existing rigid blood collection needle is prone to piercing the patient's blood vessel during blood collection, facilitates the patient's movement, and makes the patient more comfortable and safe.

[0023] Furthermore, the present utility model sets the blood transfusion interface on the blood collection bag body as a first blood transfusion interface for plugging with a blood transfusion needle and / or a second blood transfusion interface using a spiral needleless connection method. The connecting seat one of the first blood transfusion interface is made of hard plastic, and an upper cover one with a rubber sealing cover is provided at the end of the connecting seat one. Thus, the rubber sealing cover can be pierced by a needle to make the needle enter the blood collection bag body. The advantage is that the connecting seat one made of hard plastic is safer and will not be pierced by the needle. At the same time, after the needle is removed, it can return to the sealed state. Therefore, blood can be transfused in multiple times. Even if it is not used up at one time, it will not cause blood waste.

[0024] Furthermore, the second blood transfusion interface is provided with a threaded connection port at the front end of the second connecting seat which is heat-melt connected to the bottom of the blood collection bag body. A sealing plug is arranged inside the threaded connection port. The sealing plug is in a closed state in its natural state and can be opened when an object passes through. Specifically, the sealing plug seals the outer flange and the inner flange on the outer end face and the inner end face of the threaded connection port. Corresponding to the outer flange and the inner flange, there are respectively provided opening two in the shape of a straight line. Opening two is in a closed state in its natural state. The outer flange and the inner flange are connected by a flat ring-shaped sealing tube. The channel of the sealing tube communicates with opening two on the outer flange and the inner flange. Therefore, when connecting to a blood transfusion device with a threaded interface, blood transfusion can be achieved. It eliminates the blood transfusion needle and better improves the operation safety of nurses. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a blood collection device described in the present utility model;

[0026] Figure 2 is a schematic diagram of the blood collection component of a blood collection device described in the present utility model;

[0027] Figure 3 is a schematic diagram of the blood collection component of a blood collection device described in the present utility model;

[0028] Figure 4 is a sectional view of the blood collection needle assembly of a blood collection device described in the present utility model;

[0029] Figure 5 is a schematic diagram of the first connecting piece of a blood collection device described in the present utility model;

[0030] Figure 6 is a sectional schematic diagram of the second connecting piece of a blood collection device described in the present utility model;

[0031] Figure 7 、 8 is a sectional schematic diagram and an end view after removing the easy-pull seal cover of the first blood transfusion interface of a blood collection device described in the present utility model;

[0032] Figure 9 is a sectional view and an end view of the second blood transfusion interface of a blood collection device described in the present utility model;

[0033] Figure 10 is an end view of the sealing plug inside the second blood transfusion interface of a blood collection device described in the present utility model;

[0034] Figure 11 is Figure 10 the A-A sectional view of

[0035] Figure 12It is a schematic diagram of a blood transfusion set docked with the second blood transfusion interface of the blood collection device described in the present utility model;

[0036] Figure 13 It is a schematic diagram of a blood collection tube.

[0037] Description of reference numerals: Blood collection component 1, blood collection needle assembly 11, puncture needle 111, retention hose 112, hose seat 113, sealing plug 114, safety seat 115, guiding section 1151, needle seat 116, hole 1161, needle wing 1162, needle cap 117, branch tube seat 118, first blood transfusion tube 12, first connector 13; Blood collection needle seat 131, blood collection needle 132, rubber sleeve 133; Blood collection component 2, blood collection bag assembly 21, blood collection bag body 211, blood collection interface 212, anticoagulant injection port 213, blood transfusion socket 214; First blood transfusion interface 215, connecting seat one 2151, connecting part one 25111, outlet seat one 2152, upper cover one 2153, opening one 21531, wedge-shaped protrusion 21532, rubber sealing cover 2154, circular recessed part 21541, easy-pull sealing cover 2155, pull ring 2156; Second blood transfusion interface 216, connecting seat two 2161, connecting part two 21611, threaded connection port 2162, sealing plug 2163, opening two 21631, outer flange 21632, inner flange 21633, sealing tube 21634; Threaded end cap 2164; Hanging ring 217; Second blood transfusion tube 22, second connector 23, connecting seat 231, opening 2310, wall plate 2311, annular boss 2312; Chamber 2313, rubber plug 232, front part of rubber plug 2321, rear part of rubber plug 2322, recessed part 2323. Detailed implementation manners

[0038] The following will give a detailed example of the preferred embodiments of the present utility model in conjunction with the accompanying drawings, but the protection scope of the present utility model cannot be limited by the preferred embodiments.

[0039] See Figure 1-11 , the figure shows a blood collection device, which includes: a separately provided blood collection component 1 and a blood collection component 2, and the blood collection component 1 is detachably connected to the blood collection component 2;

[0040] Among them, the blood collection component 1 includes a blood collection needle assembly 11, a first blood transfusion tube 12 and a first connector 13. One end of the first blood transfusion tube 12 is connected to the blood collection needle assembly 11, and the other end is connected to the first connector 13. The blood collection device 2 includes a blood collection bag assembly 21, a second blood transfusion tube 22 and a second connector 23. One end of the second blood transfusion tube 22 is connected to the inlet end of the blood collection bag assembly 21, and the other end of the second blood transfusion tube 22 is connected to the second connector 23. The first connector 13 and the second connector 23 can be connected in a sealed and pluggable manner. When plugged, the first blood transfusion tube 12 and the second blood transfusion tube 22 are communicated.

[0041] See Figure 4 , which is a specific structural diagram of the blood collection needle assembly 11. The blood collection needle assembly 11 includes a puncture needle 111, a retention hose 112 sleeved outside the puncture needle 111. The tail end of the retention hose 112 is connected to the front end of a hollow hose seat 113. A sealing plug 114 is arranged in the cavity of the hose seat 113. The sealing plug 114 is made of soft medical rubber material. The sealing plug 114 is in sealing cooperation with the inner side wall of the hose seat 113. The puncture needle 111 passes through the sealing plug 114 and is arranged in the retention hose 112. At the side wall position of the hose seat 113 in front of the sealing plug 114, there is a branch hose seat 118 connecting the first blood transfusion tube 12. The first blood transfusion tube 12 is fixedly connected to the branch hose seat 118. A safety seat 115 is arranged at the rear end of the hose seat 113. The front end of the safety seat 115 is fixedly connected to the rear end of the hose seat 113. The rear end of the safety seat 115 has a cylindrical guiding section 1151. The tail end of the puncture needle 111 is fixed to the rear end of a needle seat 116. The needle seat 116 has a hole 1161 cooperating with the guiding section 1151. The needle seat 116 can be inserted and removed from the guiding section 1151. That is, the tail end of the puncture needle 111 is fixed to the rear end of a needle seat 116. The needle seat 116 can be inserted and removedly installed on the safety seat 115. The front end of the safety seat 115 is plugged into the rear end of the hose seat 113. The puncture needle 111 passes through the hole of the safety seat 115, extends out from the front end of the hose seat 113, and extends to the central position of the hose 112.

[0042] For the convenience of operation, a needle wing 1162 is arranged on the outer side wall of the needle seat 116 for the operator to hold easily. To prevent the puncture needle 111 from piercing the user, a needle cap 117 is arranged outside the puncture needle 111 and the retention hose 112.

[0043] See Figure 5, specifically, the connection structure of the first connecting member 13 and the second connecting member 23 is as follows: The first connecting member 13 includes a blood collection needle seat 131, a blood collection needle 132, and a rubber sleeve 133. The blood collection needle seat 131 is fixedly connected to the end of the first blood transfusion tube 12, specifically, they can be directly heat-melted together. The blood collection needle 132 is installed on the blood collection needle seat 131, and the rubber sleeve 133 is sleeved on the outer surface of the blood collection needle 132, and the front end of the rubber sleeve 133 is in a closed state.

[0044] See Figure 6 , the second connecting member 23 includes a connecting seat 231. The connecting seat 231 is in a cylindrical hollow shape. The top end of the connecting seat 231 has an opening 2310 smaller than the inner diameter of the connecting seat. The tail end of the connecting seat 231 is fixedly connected to the second blood transfusion tube 22, and the cavity of the connecting seat 231 communicates with the second blood transfusion tube 22. A rubber plug 232 is arranged at the front end inside the connecting seat 231 to seal the front end of the connecting seat 231.

[0045] When in use, the blood collection needle 132 of the first connecting member 13 can pierce the rubber sleeve 133 outside it and the rubber plug 232 of the second connecting member 23. The front end of the blood collection needle 132 enters the cavity of the connecting seat 231, realizing the connection between the first blood transfusion tube 12 and the second blood transfusion tube 22.

[0046] Therefore, when the present utility model is not in use, the blood collection component 1 and the blood collection component 2 are independently arranged. Only when in use, the first connecting member 13 can be connected to the second connecting member 23, and then blood collection can be carried out. The advantage is that after blood collection is completed, the blood collection needle 132 of the first connecting member 13 can be directly pulled out from the rubber plug 232 of the second connecting member 23, and the blood collection component 1 with the needle can be discarded. After the rubber plug 232 of the second connecting member 23 is pulled out the needle, it can be automatically sealed. This makes the subsequent storage and use of the blood bag more convenient, eliminating the cumbersome operations such as cutting the blood transfusion tube and then heat-melting to seal the port after blood collection in the existing blood collection device. It makes the collection and use of the blood bag more convenient. Another advantage is that if preoperative patient self-blood collection is implemented, the first connecting member 13 can be directly docked with the blood collection tube 5. See Figure 13 , the blood collection needle 132 of the first connecting member 13 can be directly inserted into the rubber plug at the top of the blood collection tube 5 for extracting blood for testing. Therefore, blood for testing can be collected while self-blood collection is carried out, without the need for another needle prick to draw venous blood.

[0047] See Figure 6, an annular boss 2312 is provided on the inner surface of the wall plate 2311 of the connecting seat 231. The cross-section of the annular boss 2312 is wedge-shaped. A chamber 2313 is formed inside the connecting seat 231. The annular boss 2312 is used to limit the rubber plug 232 at the front end of the chamber 2313. The rubber plug 232 includes a rubber plug front part 2321 and a rubber plug rear part 2322 that are integrally connected and have a stepped outer circle, that is, the rubber plug 232 is in the shape of a stepped column with a larger front and a smaller rear. The diameter of the rubber plug front part 2321 is larger than the diameter of the smallest part of the boss 2312 and less than or equal to the diameter of the chamber 2313. The diameter of the rubber plug rear part 2322 is less than or equal to the inner diameter of the smallest part of the annular boss 2312. The cooperation between the annular arc-shaped boss 2312 and the stepped column-shaped rubber plug 232 limits the rubber plug at the front end of the chamber 2313, that is, the open end.

[0048] To facilitate the insertion of the needle, a hemispherical recess 2323 is provided at the top of the rubber plug 232. The rubber plug front part 2321 is in the shape of a cone with a smaller front end and a larger rear end, which facilitates the rubber plug to pass through the annular boss 2312 and enter the front end of the chamber 2313.

[0049] See Figure 3 , the blood collection bag component 21 includes a blood collection bag body 211. A blood collection interface 212 and an anticoagulant injection port 213 fixedly connected to the second blood transfusion tube 22 are provided at the top of the blood collection bag body 211. Among them, the anticoagulant injection port 213 is formed by heat-sealing one end of a hose to the blood collection bag body 211 and communicating. After injecting the anticoagulant, the other end is directly heat-sealed to seal the port. Further, a blood transfusion interface is also provided on the blood collection bag body 211. In this embodiment, two blood transfusion interfaces are provided, that is, a first blood transfusion interface 215 for inserting a blood transfusion needle and a second blood transfusion interface 216 using a screwless needle connection method are provided at the bottom of the blood collection bag body 211. Obviously, only one blood transfusion interface can also be provided, either the first blood transfusion interface 215 or the second blood transfusion interface 216, to meet different needs. The positions where they are set can also be one at the upper end and one at the lower end of the blood collection bag body 211.

[0050] To facilitate the use by different users, a blood transfusion socket 214 can also be provided at the upper end of the blood collection bag body 211. The blood transfusion socket 214 is an interface made of existing double-column soft medical plastic. The upper connecting column can be unscrewed, and there is a sealing partition in the lower connecting column. The operator can use a needle to pierce the sealing partition to enter the blood collection bag body 211 to achieve blood transfusion.

[0051] Blood bag suspension rings 217 are provided at the middle positions of the upper and lower ends of the blood collection bag body 211 to facilitate blood transfusion in two directions of the blood bag.

[0052] See Figure 7 , 8, wherein, the first blood transfusion interface 215 includes: a first connecting seat 2151 heat-melt connected to the bottom of the blood collection bag body 211. The first connecting seat 2151 includes a tubular connecting seat body, and a first outlet seat 2152 integrally formed with the first connecting seat 2151 at the end of the connecting seat body. The first outlet seat 2152 is in the shape of a disc ring. A first upper cover 2153 is provided at the end of the first outlet seat 2152. The first upper cover 2153 has an opening 21531 smaller than the outer wall diameter thereof. A rubber sealing cover 2154 is provided inside the first upper cover 2153. An easy-pull sealing cover 2155 is provided at the opening 21531 at the top of the first upper cover 2153, and a pull ring 2126 is provided on the easy-pull sealing cover 2155.

[0053] The first connecting seat 2151 further includes a first connecting portion 25111 connected to the other end of the connecting seat body and used for heat-melt connecting to the bottom of the blood collection bag body 211. The cross-section of the first connecting portion 25111 is a hollow flat rhombic prism shape, and the flat rhombic prism-shaped first connecting portion 25111 is convenient for heat-melt connecting to the bottom of the blood collection bag body 211.

[0054] A ring-shaped wedge-shaped protrusion 21532 is provided on the inner wall of the first upper cover 2153, and the rubber sealing cover 2154 is limited at the front end of the first upper cover 2153 by the wedge-shaped protrusion 21532; circular concave portions 21541 are provided on the front and rear end faces of the rubber sealing cover 2154. In this embodiment, three circular concave portions 21541 are provided, which are convenient for a needle to pierce through the rubber sealing cover 2154 and will not form cracks on the surface of the rubber sealing cover 2154.

[0055] When using for blood transfusion, first pull the pull ring 2126 to pull down the easy-pull sealing cover 2155, and then insert the blood transfusion needle into the rubber sealing cover 2154 of the first blood transfusion interface 215 and into the blood collection bag body 211, then blood transfusion can be carried out. The blood transfusion can be stopped midway according to needs, the blood transfusion needle is pulled out, and next time it can continue to pierce through the rubber sealing cover 2154 at another circular concave portion 21541 for use. Therefore, the first blood transfusion interface 215 can be reused multiple times for multiple blood transfusions, and the first connecting seat 2151 is made of hard medical plastic. Therefore, medical staff will not pierce through the tube wall of the first connecting seat 2151 during operation, and its safety is better.

[0056] See Figure 9 、 10, 11. Another blood transfusion interface in this embodiment is a needleless interface. The second blood transfusion interface 216 includes a second connecting seat 2161 that is heat-melted and connected to the bottom of the blood collection bag body 211, and a cylindrical threaded connection port 2162 with external threads integrally formed on the second connecting seat 2161. The diameter of the second connecting seat 2161 is greater than the diameter of the threaded connection port 2162. A sealing plug 2163 is provided inside the threaded connection port 2162. The sealing plug 2163 has an opening that is in a closed state in its natural state. There is a threaded end cap 2164 outside the threaded connection port 2162.

[0057] The sealing plug 2163 includes an outer flange 21632 and an inner flange 21633 that block the outer end face and the inner end face of the threaded connection port 2162. The outer flange 21632, the inner flange 21633, and the outer end face and the inner end face of the threaded connection port 2162 can be adhesively fixed and sealed. Openings 21631 are provided on both the outer flange 21632 and the inner flange 21633. The openings 21631 are in a closed state in their natural state. The inner flange 21633 and the outer flange 21632 are connected by a sealing tube 21634. The sealing tube 21634 is in the shape of a flat ring tube. The passage of the sealing tube 21634 communicates with the openings 21631 on the inner flange 21633 and the outer flange 21632.

[0058] The tail end of the second connecting seat 2161 has a connecting portion two 21611 that is tubular or flat tubular and has a smaller diameter at the front end for heat-melting connection with the bottom of the blood collection bag body 211. The connecting portion two 21611 facilitates the heat-melting connection of the bottom of the blood collection bag body 211.

[0059] During use, the threaded end cap 2164 can be unscrewed, and the blood transfusion set 6 with a needleless interface at the tail end can be directly connected to the threaded connection port 2162. Refer to Figure 12 , the front end of the blood transfusion set 6 has a blood transfusion puncture needle 61. The puncture needle 61 is connected to a needleless interface 62 at the tail end through a tube 63. A cylindrical central tube 621 protrudes in the middle of the needleless interface 62. The central tube 621 communicates with the tube 63. An internally threaded threaded cap 622 is provided outside the central tube 621. When the threaded cap 622 is connected to the threaded connection port 2162, the central tube 621 can pass through the openings 21631 on the outer flange 21632 and the inner flange 21633 of the sealing plug 2163 to communicate with the blood collection bag body 211, thereby realizing needleless blood transfusion. This connection method can ensure the risk of needle stick injury and improve the safety of clinical nurses.

[0060] The above description is illustrative rather than restrictive to the present utility model. The present utility model aims to provide a blood collection device. Those of ordinary skill in the art understand that without departing from the spirit and scope defined by the claims, many modifications, variations or equivalents can be made, such as changing the structure of the blood collection needle assembly, omitting the blood transfusion socket, etc., but all will fall within the protection scope of the present utility model.

Claims

1. A blood collection device, characterized in that, It includes: An independently provided blood collection component (1) and a blood collection component (2), wherein the blood collection component (1) is detachably connected to the blood collection component (2); The blood collection component (1) includes a blood collection needle assembly (11), a first blood transfusion tube (12) connected to the tail end of the blood collection needle assembly (11), and a first connector (13) connected to the other end of the first blood transfusion tube (12); the blood collection component (2) includes a blood collection bag assembly (21), a second blood transfusion tube (22) connected to the inlet end of the blood collection bag assembly (21), and a second connector (23) provided at the other end of the second blood transfusion tube (22), and the first connector (13) and the second connector (23) are hermetically pluggable and connectable, and when connected, the first blood transfusion tube (12) and the second blood transfusion tube (22) are communicated.

2. The blood collection device according to claim 1, characterized in that The first connector (13) includes: a blood collection needle seat (131) fixedly connected to the end of the first blood transfusion tube (12), a blood collection needle (132) installed at the end of the blood collection needle seat (131), and a rubber sleeve (133) with a closed front end sleeved on the outer surface of the blood collection needle (132); The second connector (23) includes a connecting seat (231), the connecting seat (231) is in a cylindrical hollow shape, the top end of the connecting seat (231) has an opening (2310) smaller than the inner diameter of the connecting seat, and the tail end of the connecting seat (231) is fixedly connected to the second blood transfusion tube (22), and a rubber plug (232) is provided in the connecting seat (231) for closing the end of the connecting seat (231); When the blood collection needle (132) pierces the rubber sleeve (133) and the rubber plug (232), the first blood transfusion tube (12) and the second blood transfusion tube (22) are communicated.

3. The blood collection device according to claim 2, characterized in that The rubber plug (232) is provided at the front end in the chamber (2313) of the connecting seat (231), and an annular boss (2312) with a wedge-shaped cross section for limiting the rubber plug (232) at the front end of the chamber (2313) is provided on the inner surface of the wall plate (2311) of the connecting seat (231); the rubber plug (232) includes a rubber plug front part (2321) and a rubber plug rear part (2322) with a stepped outer circle connected as a whole, the diameter of the rubber plug front part (2321) is larger than the inner diameter of the annular boss (2312) and is in sealing fit with the inner surface of the chamber (2313), and the diameter of the rubber plug rear part (2322) is less than or equal to the minimum diameter of the annular boss (2312).

4. The blood collection device according to claim 3, wherein, A hemispherical recess (2323) is provided at the top end of the rubber plug (232); the rubber plug front part (2321) is in a conical shape with a smaller front end and a larger rear end.

5. The blood collection device according to claim 1, characterized in that, The blood collection needle assembly (11) includes a puncture needle (111), a retention hose (112) sleeved outside the puncture needle (111). The tail end of the retention hose (112) is connected to the front end of a hollow hose seat (113). A sealing plug (114) is provided inside the hose seat (113). The sealing plug (114) is in sealing cooperation with the inner side wall of the hose seat (113). The puncture needle (111) passes through the sealing plug (114) and is arranged inside the retention hose (112). At the side wall position of the hose seat (113) in front of the sealing plug (114), a branch seat (118) connecting the first blood transfusion tube (12) is provided. A safety seat (115) is provided at the rear end of the hose seat (113). The front end of the safety seat (115) is inserted into the rear end of the hose seat (113). The rear end of the safety seat (115) has a cylindrical guiding section (1151). The tail end of the puncture needle (111) is fixedly installed on a needle seat (116). The needle seat (116) has a hole (1161) matching with the guiding section (1151). The needle seat (116) can be inserted and pulled out on the guiding section (1151).

6. The blood collection device according to claim 5, wherein, Wing needles (1162) are provided on the outer side wall of the needle seat (116). A needle cap (117) is provided outside the puncture needle (111) and the retention hose (112).

7. A blood collection device according to any one of claims 1-6, characterized in that The blood collection bag assembly (21) includes a bag-shaped blood collection bag body (211). At the top end of the blood collection bag body (211), a blood collection interface (212) fixedly connected to the second blood transfusion tube (22) and an anticoagulant injection port (213) for injecting anticoagulant are provided; at the bottom end or the top end of the blood collection bag body (211), a first blood transfusion interface (215) inserted by a blood transfusion needle and / or a second blood transfusion interface (216) using a spiral needleless connection method are provided.

8. The blood collection device according to claim 7, characterized in that, Hanging rings (217) are provided at the middle positions of the upper and lower ends of the blood collection bag body (211).

9. A blood collection device according to claim 7, characterized in that The first blood transfusion interface (215) includes: a connection seat one (2151) made of hard plastic and heat-melted to the bottom of the blood collection bag body (211). The connection seat one (2151) includes a tubular connection seat body. An outlet seat one (2152) in the shape of a circular ring disk located at the end of the connection seat body and integrally formed with the connection seat one (2151). An upper cover one (2153) is provided at the upper end of the outlet seat one (2152). The upper cover one (2153) has an opening one (21531) smaller than its outer wall diameter. A rubber sealing cover (2154) is provided inside the upper cover one (2153). An easy-pull sealing cover (2155) is provided at the opening one (21531) at the top end of the upper cover one (2153). A pull ring (2156) is provided on the easy-pull sealing cover (2155).

10. The blood collection device according to claim 9, characterized in that, The first connecting seat (2151) further includes a first connecting portion (25111) connected to the other end of the connecting seat body and used for thermally fusing with the bottom of the blood collection bag body (211). The cross-section of the first connecting portion (25111) is a hollow rhombic prism shape.

11. A blood collection device according to claim 9, wherein a ring-shaped wedge-shaped protrusion (21532) is provided on the inner wall of the first upper cover (2153), and the rubber sealing cover (2154) is limited to the front end of the first upper cover (2153) by the wedge-shaped protrusion (21532); circular recessed portions (21541) recessed inward are provided on the front and rear end faces of the rubber sealing cover (2154).

12. A blood collection device according to claim 7, wherein the second blood transfusion interface (216) includes a second connecting seat (2161) made of hard plastic in a tubular shape and thermally fused with the bottom of the blood collection bag body (211), and a cylindrical threaded connection port (2162) with an external thread integrally formed on the second connecting seat (2161). The diameter of the second connecting seat (2161) is larger than the diameter of the threaded connection port (2162). A sealing plug (2163) is provided in the threaded connection port (2162). An opening two (21631) in a closed state in the natural state is provided on the sealing plug (2163), and a threaded end cap (2164) is provided outside the threaded connection port (2162).

13. A blood collection device according to claim 12, wherein the sealing plug (2163) includes an outer flange (21632) and an inner flange (21633) blocking the outer end face and the inner end face of the threaded connection port (2162). Openings two (21631) in a closed state in the natural state are provided on both the inner flange (21633) and the outer flange (21632). The inner flange (21633) and the outer flange (21632) are connected by a flat ring-shaped tubular sealing tube (21634). The channel of the sealing tube (21634) is communicated with the openings two (21631) on the inner flange (21633) and the outer flange (21632).

14. A blood collection device according to claim 12, wherein, The tail end of the second connecting seat (2161) has a second connecting portion (21611) in a tubular or flat tubular shape with a smaller diameter at the front end and is used for thermally fusing with the bottom of the blood collection bag body (211).

15. A blood collection device according to any one of claims 1-6, characterized in that, The blood collection component (2) further includes a blood collection tube (5).

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