Blood suction buffer device

Abstract

The invention discloses a blood suction buffer device, and belongs to the technical field of medical instruments. The device comprises a shell, an umbrella-shaped plug, a flow guide ring and a buffer plug, a housing; the central axes of the umbrella-shaped plug, the flow guide ring and the buffer plug are overlapped; an air inlet and an air outlet are respectively formed in two ends of the shell; the guide ring clings to the inner wall of the shell; a flow channel is arranged on the flow guide ring; one side of the flow guide ring is close to the air inlet, and a distance larger than zero is formed between the flow guide ring and the air inlet; an umbrella cover of the umbrella-shaped plug is buckled on the other side of the flow guide ring to seal a flow channel of the flow guide ring; the buffer plug is located on the other side of the flow guide ring, and a fourth cavity is formed between the inner side of the flower-shaped head and the flow guide ring. A second cavity is formed between the outer side of the flower-shaped head and the shell. The two-stage rubber plugs of the petal-shaped structure and the umbrella-shaped structure are closed and opened under the action of negative pressure, so that buffer suction of blood is realized, the survival rate of red blood cells is ensured, and meanwhile, the relatively high suction rate can also be ensured.

Description

Technical Field

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

[0002] In the prior art for blood extraction, the adopted aspiration method will generate relatively large surface tension and shear stress, resulting in red blood cell damage. Moreover, when using metal materials to achieve a similar function, since most of them do not have biocompatibility, it will also cause problems such as red blood cell damage and coagulation, and it is impossible to ensure the blood collection speed while ensuring the cell survival rate. Summary of the Invention

[0003] In view of this, the present invention proposes to add a buffer device in a traditional negative pressure blood recovery system. This device is composed of plastic and rubber materials, which can avoid the damage to red blood cells caused by using metal materials in traditional mechanical structures. The present invention realizes the buffered aspiration of blood through the closing and opening processes of two-stage rubber plugs of a petal-shaped structure and an umbrella-shaped structure under negative pressure, and can ensure a high aspiration rate while ensuring the survival rate of red blood cells.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A blood aspiration buffer device, comprising a housing 1, an umbrella-shaped plug 2, a guide ring 3 and a buffer plug 4;

[0006] The housing 1; the umbrella-shaped plug 2, the guide ring 3 and the buffer plug 4 are all located in the housing 1, and the central axes of the four coincide;

[0007] Both ends of the housing are an air inlet and an air outlet respectively;

[0008] The guide ring is closely attached to the inner wall of the housing 1; a flow channel 31 is provided on the guide ring 3; one side of the guide ring is close to the air inlet and has a spacing greater than zero from the air inlet; the umbrella cover 22 of the umbrella-shaped plug 2 is buckled on the other side of the guide ring to form a seal for the flow channel of the guide ring;

[0009] The main body of the buffer plug is a flower-shaped head, and a liquid outlet is provided on the flower-shaped head; when the flower-shaped head is in a retracted state, the liquid outlet is closed; when the flower-shaped head is in a diastolic state, the liquid outlet is opened;

[0010] The buffer plug 4 is located on the other side of the guide ring 3, and a chamber four 41 is formed between the inner side of the flower-shaped head and the guide ring; a chamber two 14 is formed between the outer side of the flower-shaped head 42 and the housing.

[0011] Further, the umbrella-shaped plug 2 includes an umbrella handle 21 and an umbrella cover 22; one end of the umbrella handle 21 is connected to the center of the umbrella cover 22, and the other end passes through the central hole of the guide ring 3 and forms a seal.

[0012] Further, the housing is respectively divided into two parts: an air inlet end housing 12 and an air outlet end housing 13; the air inlet end housing 12 and the air outlet end housing 13 are welded by high-frequency technology.

[0013] Further, the guide ring 3 and the air inlet end housing form a first chamber 11; there is a stepped structure at the end of the air inlet end housing for accommodating the outer edge of the guide ring 3 and clamping the outer edge of the guide ring 3 in cooperation with the air outlet end housing 13.

[0014] Further, the air inlet end housing 12 and the air outlet end housing 13 are both provided with tapered joint parts; the air inlet and the air outlet both penetrate through the corresponding tapered joint parts.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The present invention proposes a flower-shaped blood buffering device, which realizes the buffering and protecting function of blood during the negative pressure suction process through the contraction and expansion of the flower-shaped head;

[0017] 2. Through the chamber and structure design, the present invention realizes the three-stage buffering suction of blood, greatly reduces the surface tension of blood flow, and realizes the protection of red blood cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the blood suction buffering device according to an embodiment of the present invention.

[0019] Figure 2 Schematic cross-sectional structure diagram (contraction) of the blood suction buffering device according to an embodiment of the present invention.

[0020] Figure 3 is a schematic cross-sectional structure diagram (expansion) of the blood suction buffering device according to an embodiment of the present invention.

[0021] Figure 4 is an exploded structural diagram of the blood suction buffering device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be described completely in conjunction with 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 of 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.

[0023] Refer to Figures 1 to 4, this embodiment includes a housing, a flow guide ring, an umbrella-shaped plug, and a buffer plug; the flow guide ring is located inside the housing and cooperates with the housing to form Chamber 1; the umbrella-shaped plug is located at the center of the flow guide ring and cooperates with the flow guide ring to form Chamber 3; the buffer plug is located inside the housing, cooperates with the housing to form Chamber 2, and cooperates with the flow guide ring to form Chamber 4; there are steps inside the housing for clamping the flow guide ring; there are circumferential buckles at the top of the flow guide ring for cooperating with the housing to clamp the buffer plug; the umbrella-shaped plug has an umbrella handle at the tail for cooperating with the umbrella cover to fix the umbrella-shaped plug inside the flow guide ring.

[0024] Blood aspiration buffer device 1, housing; 11, Chamber 1; 12, intake end housing; 13, outlet end housing; 14, Chamber 2 2, umbrella-shaped plug; 21, umbrella handle; 22, umbrella cover; 3, flow guide ring; 31, flow channel; 32, Chamber 3; 33, buckle; 4, buffer plug; 41, Chamber 4; 421, flower-shaped head (closed); 422, flower-shaped head (open); 43, liquid outlet

[0025] Working principle:

[0026] The main purpose of the present invention is to provide a device for buffering blood during aspiration.

[0027] To achieve the above object, the present invention provides a blood aspiration buffer device, including a housing 1, which includes an intake end housing 12 and an outlet end housing 13; an umbrella-shaped plug 2, which includes an umbrella handle 21 and an umbrella cover 22; a flow guide ring 3, which includes a flow channel 31; a buffer plug 4, which includes a flower-shaped head 42 and a liquid outlet 43.

[0028] The working principle of the blood aspiration buffer device is as follows: First, connect the tail end of the air outlet housing 13 to an external negative pressure source. After the gas inside the second chamber 14 is gradually emptied, the flower-shaped head 42 gradually expands, changing from the state of flower-shaped head (closed) 421 to the state of flower-shaped head (open) 422. At the same time, the liquid outlet 43 opens, and the plane where the liquid outlet 43 is located closely adheres to the inner wall plane of the air outlet housing 13, and the gas inside the fourth chamber 41 begins to be extracted. After the gas inside the fourth chamber 41 is gradually emptied, the flower-shaped head 42 gradually retracts, changing from the state of flower-shaped head (open) 422 to the state of flower-shaped head (closed) 421. At the same time, the umbrella cover 22 flips open, and the air inside the third chamber 32 and the first chamber 11 connected to it through the flow channel 31 begins to be extracted. After the gas inside the third chamber 32 is gradually emptied, the umbrella cover 22 flips back. When the tail end of the air inlet housing 12 is connected to human blood waste liquid, the blood will enter the inside of the first chamber 11, the flow channel 31, and the third chamber 32 under the action of atmospheric pressure. The pressure inside the third chamber 32 gradually increases, and the umbrella cover 22 flips open under the action of the pressure difference. The blood enters the inside of the fourth chamber 41 through the third chamber 32. The pressure inside the fourth chamber 41 gradually increases, and the flower-shaped head 42 gradually expands, changing from the state of flower-shaped head (closed) 421 to the state of flower-shaped head (open) 422. At the same time, the liquid outlet 43 opens, and the plane where the liquid outlet 43 is located closely adheres to the inner wall plane of the air outlet housing 13, and the blood is discharged through the tail end of the air outlet housing 13. After the inside of the fourth chamber 41 is gradually emptied, the flower-shaped head 42 gradually retracts, changing from the state of flower-shaped head (open) 422 to the state of flower-shaped head (closed) 421, and a complete working process ends.

[0029] The outer shell 1 is used to accommodate the umbrella-shaped plug 2, the guide ring 3, and the buffer plug 4. It includes two parts, the air inlet housing 12 and the air outlet housing 13, which are welded by high-frequency technology between the two parts.

[0030] The first chamber 11 is used to buffer the flowing blood for the first time to prevent too fast flow rate from forming a large surface tension. The blood flows in through the tail end of the air inlet housing 12 and is buffered in the first chamber 11. The first chamber 11 no longer receives blood until the content is discharged and negative pressure is re-established.

[0031] The air inlet housing 12 is used to accommodate and clamp the guide ring 3, and cooperate with the guide ring 3 to form the largest possible first chamber 11. There is a step structure at its end, which can accommodate the outer edge of the guide ring 3 and cooperate with the air outlet housing 13 to clamp the guide ring 3. There is a tapered joint structure at its tail end, which can accommodate the inflow of blood and gas.

[0032] The air outlet housing 13 is used to accommodate the buffer plug 4 and cooperate with the air inlet housing 12 to clamp the guide ring 3. The end of it presses the outer edge of the guide ring 3 to prevent the guide ring 3 from shifting under the action of the pressure difference. There is a tapered joint structure at its tail end, which can accommodate the outflow of blood and gas.

[0033] Chamber Two 14 functions to maintain negative pressure and cooperate with Chamber Four 41 to control the expansion and closing of the flower-shaped head 42. When the air outlet end housing 13 is connected to a negative pressure source, Chamber Two 14 maintains a relatively high negative pressure. Under the action of the pressure difference, the flower-shaped head 42 expands and gradually changes from the state of flower-shaped head (closed) 421 to the state of flower-shaped head (open) 422. After negative pressure is established inside Chamber Four 41, the pressure difference is eliminated, and the flower-shaped head 42 gradually retracts and changes from the state of flower-shaped head (open) 422 to the state of flower-shaped head (closed) 421.

[0034] The umbrella-shaped plug 2 functions to cooperate with the guide ring 3 to perform a second buffering of the blood. After the blood is buffered in Chamber One 11, it flows into the interior of Chamber Three 32 through the flow channel 31. When the umbrella cover 22 is closed, the blood is buffered and temporarily stored in Chamber Three 32. The umbrella-shaped plug can be regarded as a bowl-shaped rubber pad in this embodiment, which has the function of preventing backflow, and the strength can be increased by arranging umbrella ribs on the rubber pad.

[0035] The umbrella handle 21 functions to fix the umbrella-shaped plug 2 and prevent the umbrella-shaped plug 2 from being pulled out of the interior of the guide ring 3 under the action of the pressure difference and losing the interference fit with the guide ring 3.

[0036] The umbrella cover 22 functions to perform a second buffering of the blood by opening and closing. After the blood is buffered in Chamber One 11, it flows into the interior of Chamber Three 32 through the flow channel 31. When the umbrella cover 22 is closed, the blood is buffered and temporarily stored in Chamber Three 32. When the pressure in Chamber Three 32 increases and a pressure difference is established with Chamber Four 41, the umbrella cover 22 opens, and the blood after the second buffering enters Chamber Four 41.

[0037] The guide ring 3 functions to cooperate with the umbrella-shaped plug 2 to perform a second buffering of the blood. It cooperates with the umbrella-shaped plug 2 to form Chamber Three 32 and cooperates with the buffer plug 4 to form Chamber Four 41.

[0038] The flow channel 31 functions to guide the blood that has been buffered for the first time in Chamber One 11 and enter Chamber Three 32 to achieve the second buffering. The flow channel 31 passes through the guide ring 3, connects to Chamber One 11 outwardly, and connects to Chamber Three 32 inwardly.

[0039] Chamber Two 32 functions to perform a second buffering of the blood and at the same time reduce the contact area between the umbrella-shaped plug 2 and the guide ring 3 to prevent the opening of the umbrella cover 22 from being affected by surface adhesion.

[0040] The buckle 33 functions to press the buffer plug 4 to prevent the buffer plug 4 from being displaced under the action of the pressure difference and losing the third buffering effect on the blood.

[0041] The buffer plug 4 functions to cooperate with the air outlet end housing 13 to perform a third buffering of the blood. It cooperates with the guide ring 3 to form Chamber Four 41 and cooperates with the air outlet end housing 13 to form Chamber Two 14.

[0042] Chamber Four 41 functions to store negative pressure. After the flower-shaped head 42 closes, relying on the negative pressure stored in Chamber Four 41, a pressure difference is formed with Chamber Three to open the umbrella cover 22; Chamber Four 41 should be maintained within a reasonable range. If Chamber Four 41 is too large, the speed of establishing negative pressure is too slow, which will affect the effect of the third buffer. If Chamber Four 41 is too small, the frequency of eliminating negative pressure, i.e., suction, is too fast, which will cause a large amount of air bubbles to be mixed into the blood, being unfavorable for subsequent processing.

[0043] The flower-shaped head 42 functions to achieve the third buffer of blood through relaxation and contraction. When the air outlet end housing 13 is connected to a negative pressure source, Chamber Two 14 maintains a relatively high negative pressure. Under the action of the pressure difference, the flower-shaped head 42 relaxes and gradually changes from the state of flower-shaped head (closed) 421 to the state of flower-shaped head (open) 422; after negative pressure is established inside Chamber Four 41, the pressure difference is eliminated, and the flower-shaped head 42 gradually retracts, gradually changing from the state of flower-shaped head (open) 422 to the state of flower-shaped head (closed) 421; during this process, the umbrella cover 22 opens, and blood enters Chamber Four 41 from Chamber Three 32, and the negative pressure inside Chamber Four 41 and the flower-shaped head 42 increases; the flower-shaped head relaxes under the action of the pressure difference between Chamber Four 41 and Chamber Two 14, gradually changing from the state of flower-shaped head (closed) 421 to the state of flower-shaped head (open) 422, and the plane where the liquid outlet 43 is located closely adheres to the inner wall plane of the air outlet end housing 13, and the blood is discharged through the tail end of the air outlet end housing 13; at the same time, negative pressure is established inside Chamber Four 41, the pressure difference is eliminated, and the flower-shaped head 42 gradually retracts, gradually changing from the state of flower-shaped head (open) 422 to the state of flower-shaped head (closed) 421. The flower-shaped head can be regarded as having extremely small holes provided on a rubber sleeve in this embodiment. Due to the material of the rubber itself, the extremely small holes will not pass gas and liquid, but when the rubber sleeve expands, the extremely small holes become larger and can pass gas or liquid.

[0044] The liquid outlet 43 functions to complete the third buffer and discharge of blood following the relaxation and contraction of the flower-shaped head 42. When the flower-shaped head 42 contracts, the liquid outlet 43 naturally tightens to block and buffer the blood entering the buffer plug 4; when the flower-shaped head 42 relaxes, the liquid outlet 43 opens under the action of the pressure difference, and the blood buffered by the buffer plug 4 is discharged through the liquid outlet 43.

Claims

1. A blood aspiration buffer device, characterized in that, It includes a housing (1), an umbrella-shaped plug (2), a flow guiding ring (3) and a buffer plug (4); The said housing (1); the said umbrella-shaped plug (2), flow guiding ring (3) and buffer plug (4) are all located inside the housing (1), and the central axes of the four coincide; The two ends of the said housing are respectively an air inlet and an air outlet; The said flow guiding ring is closely attached to the inner wall of the housing (1); there is a flow channel (31) on the flow guiding ring (3); one side of the said flow guiding ring is close to the air inlet and there is a distance greater than zero between it and the air inlet; the umbrella cover (22) of the umbrella-shaped plug (2) is buckled on the other side of the flow guiding ring to seal the flow channel of the flow guiding ring; The main body of the said buffer plug is a flower-shaped head, and there is a liquid outlet on the flower-shaped head; when the flower-shaped head is in the retracted state, the liquid outlet is closed; when the flower-shaped head is in the expanded state, the liquid outlet is opened; The said buffer plug (4) is located on the other side of the flow guiding ring (3), and a chamber four (41) is formed between the inner side of the flower-shaped head and the flow guiding ring; a chamber two (14) is formed between the outer side of the flower-shaped head (42) and the housing.

2. The blood aspiration buffer device according to claim 1, characterized in that, The said umbrella-shaped plug (2) includes an umbrella handle (21) and an umbrella cover (22); one end of the said umbrella handle (21) is connected to the center of the umbrella cover (22), and the other end passes through the central hole of the flow guiding ring (3) and forms a seal.

3. The blood aspiration buffer device according to claim 1, characterized in that, The said housing is respectively divided into two parts: an air inlet end housing (12) and an air outlet end housing (13); the air inlet end housing (12) and the air outlet end housing (13) are welded by high-frequency technology.

4. The blood aspiration buffer device according to claim 3, characterized in that, The said flow guiding ring (3) cooperates with the air inlet end housing to form a chamber one (11); there is a stepped structure at the end of the air inlet end housing for accommodating the outer edge of the flow guiding ring (3) and cooperating with the air outlet end housing (13) to clamp the outer edge of the flow guiding ring (3).

5. The blood aspiration buffer device according to claim 3, characterized in that, Both the air inlet end housing (12) and the air outlet end housing (13) are provided with tapered joint parts; the air inlet and the air outlet both penetrate through the corresponding tapered joint parts.

6. The blood aspiration buffer device according to claim 1, characterized in that, The said buffer plug includes a barrel wall and a flower-shaped head, and the said flower-shaped head is located at one end of the barrel wall and is connected; the chamber four is composed of two parts of space, one is the internal space of the flower-shaped head, and the other is the space formed by the barrel wall and the flow guiding ring.

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