Blood detection device

Abstract

The invention relates to the field of clinical detection and analysis, in particular to a blood detection device which comprises a machine body, a sample disc, a sample suction needle, a reagent disc, a reagent needle, a cuvette and a cleaning mechanism are arranged on the machine body, a separation net set is fixed to the sample suction needle and comprises a connecting sleeve, a filter net and a connecting rod, and the top end of the connecting rod is fixed to the connecting sleeve; the bottom end of the connecting rod is fixed to the filter screen, the diameter of the filter screen is larger than the inner diameter of the sample bottle, a bottle opening of the sample bottle is communicated with a flaring-shaped guide neck, the small-diameter end of the guide neck is communicated with the sample bottle, the diameter of the large-diameter end of the guide neck is larger than that of the filter screen, and the filter screen is in a flattened state in a natural state. The connecting rod and the filter screen can be inserted into the sample bottle, and the edge of the filter screen is in contact with the inner wall of the sample bottle when the filter screen is inserted into the sample bottle. The problem that in the prior art, the sample suction needle is blocked due to the fact that macroscopic fibrin appears in serum can be solved.

Description

Technical Field

[0001] The present invention relates to the field of clinical detection and analysis, and in particular to a blood detection device. Background Art

[0002] Clinically, when doing blood testing, medical staff first let the patient's blood sample stand for a period of time to allow the components in the blood to be initially separated. The blood sample is then centrifuged to separate the blood sample into the upper layer of serum and the lower layer of blood cells. The separated serum is transferred to a sample bottle and placed in the sample tray of the detector. It is then sucked into a cuvette by a sample needle, and then the reagent needle sucks the reagent in the reagent tray into the cuvette to mix with the blood sample.

[0003] However, in the actual operation process, the inventors found that there was fibrin or blood clots visible to the naked eye in some of the serum after separation. Fibrin or blood clots may cause the sample suction needle to become blocked when drawing serum, thereby affecting the test results. In severe cases, it may also force the equipment to shut down for maintenance, seriously affecting work efficiency and detection accuracy. Through analysis, it was found that these fibrins and blood clots may be caused by incomplete separation or insufficient standing time. At present, in order to solve this problem, medical staff usually use cotton swabs to pick them out of the serum when fibrin or blood clots are found. However, in actual work, faced with a large number of blood samples, high-intensity work rhythms and repetitive operating steps, the probability of clogging of the sample suction needle may increase due to omissions and negligence. Summary of the invention

[0004] The present invention is intended to provide a blood testing device to solve the problem in the prior art that the presence of visible fibrin in the serum may cause clogging of the sample aspiration needle.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] A blood testing device comprises a body, on which a sample tray, a sample suction needle, a reagent tray, a reagent needle, a cuvette and a cleaning mechanism are arranged. The cuvette is arranged between the sample suction needle and the reagent needle. The sample suction needle is used to suck a sample from a sample bottle placed in the sample tray into the cuvette. The reagent needle is used to suck a reagent from a reagent bottle placed in the reagent tray into the cuvette. The cleaning mechanism is used to clean the sample suction needle. A separation net group is fixed on the sample suction needle. The separation net group comprises a connecting sleeve, a circular elastic filter net and at least three connecting rods. The top end of the connecting rod is fixed on the connecting sleeve, the bottom end of the connecting rod is fixed on the filter net and is arranged in an array with the center of the filter net as the center. The diameter of the filter net is larger than the inner diameter of the sample bottle. The bottle mouth of the sample bottle is connected to a flared guide neck. The small diameter end of the guide neck is connected to the sample bottle. The diameter of the large diameter end of the guide neck is larger than the diameter of the filter net. The filter net is flattened in a natural state. The connecting rod and the filter net can be inserted into the sample bottle. When the filter net is inserted into the sample bottle, the edge of the filter net contacts the inner wall of the sample bottle.

[0007] Preferably, as an improvement, the cleaning mechanism includes a cleaning pool, a cover plate is arranged above the cleaning pool, a cleaning inlet is opened on the cover plate, the diameter of the filter screen is larger than the diameter of the cleaning inlet, and the connecting rod and the filter screen can also be inserted into the cleaning inlet.

[0008] Preferably, as an improvement, the diameter of the circle formed by the multiple connecting rods is smaller than the inner diameter of the sample bottle and the cleaning inlet.

[0009] Preferably, as an improvement, the connecting rod is connected to the edge of the filter screen, the connecting rod is divided into two parts in the middle and the upper and lower parts of the connecting rod are connected by an arc-shaped elastic member, and the arc centers of the elastic member are relatively arranged.

[0010] Preferably, as an improvement, the elastic member is a plastic sheet or a spring sheet.

[0011] Preferably, as an improvement, when the elastic member is a spring sheet, a protective sleeve is provided on the outer sleeve of the connecting rod.

[0012] Preferably, as an improvement, the connecting sleeve is a rubber sleeve or a silicone sleeve, and the filter net is a rubber net or a silicone net.

[0013] Preferably, as an improvement, the sample tray is connected to a sample outlet channel, and a pushing mechanism for pushing the sample bottle to below the sample aspiration needle is provided in the sample outlet channel.

[0014] Preferably, as an improvement, the mesh diameter of the filter is 0.05 mm.

[0015] The principles and beneficial effects of this scheme are:

[0016] 1. In this scheme, a separation net group is set on the sample suction needle. When the sample is sucked, the separation net group is inserted into the sample bottle together with the sample suction needle. The separation net group blocks the fibrin or blood clots in the serum, thereby effectively avoiding the clogging of the sample suction needle. The mesh diameter of the filter net in this scheme is 0.05mm, which can block most of the fibrin and blood clots, and has a good anti-clogging effect.

[0017] On the basis of the above, this solution also guides the separation net group by specially setting the structure of the separation net group and cooperating with the expanded guide neck set at the mouth of the sample bottle, so that the filter net can enter the sample bottle under compression, and after being taken out of the sample bottle, the filter net can be reset by its own elastic force. The shaking caused by the reset moment can shake off the fibrin or blood clot attached to the filter net to a certain extent, which is convenient for subsequent cleaning. Specifically:

[0018] In one embodiment, the bottom end of the connecting rod is connected to the edge of the filter screen. Since the diameter of the filter screen is larger than the inner diameter of the sample bottle, that is, the diameter of the circle formed by the connecting rod is larger than the diameter of the sample bottle, and the connecting rod is divided into two parts, the upper and lower parts are connected by elastic members arranged inwardly with the arc center facing inward. Therefore, when the connecting rod is inserted into the sample bottle, the lower half of the connecting rod can be pressed inwardly under the guiding action of the inclined surface of the inner wall of the guide neck due to the presence of the elastic member, so that the filter screen shrinks, thereby allowing the filter screen and the connecting rod to enter the sample bottle smoothly, and the reset action of the elastic member can also enable the connecting rod to drive the edge of the filter screen to press against the inner wall of the sample bottle, thereby better blocking fibrin and blood clots. After the separation net group is taken out of the sample bottle, the connecting rod is separated and reset outwardly under the elastic reset action of the elastic member, thereby driving the filter screen to flatten, and the filter screen is shaken at the moment of flattening.

[0019] In another embodiment, the diameter of the circle formed by the connecting rod is smaller than the inner diameter of the sample bottle, that is, the connecting rod is not connected to the edge of the filter screen at this time, and the edge of the filter screen is in a free state. When the connecting rod and the filter screen are inserted into the sample bottle, the connecting rod can smoothly enter the sample bottle, and the edge of the filter screen is guided by the guide surface formed by the inclined surface of the inner wall of the guide neck, and the edge of the filter screen is upturned and closely attached to the inner wall of the sample bottle to enter the sample bottle, thereby better blocking fibrin and blood clots. When the connecting rod and the filter screen are taken out of the sample bottle, the edge of the filter screen returns to a flat state due to its own elasticity and gravity, and the recovery moment can also achieve a certain degree of shaking of the filter screen.

[0020] 2. Based on the principle of the above point 1, the filter can also be compressed when the sample suction needle is inserted into the cleaning inlet, and can be expanded again when it passes through the cleaning inlet and enters the cleaning tank, thereby causing the filter to shake again in the cleaning tank, which can further shake off the fibrin or blood clots on the filter, making it easier to clean and improving the cleaning effect.

[0021] 3. In this scheme, a rubber sleeve or a silicone sleeve is used as a connecting sleeve. It can be easily put on the sample suction needle by utilizing its elasticity, and can be stably put on the sample suction needle by relying on its friction force. It not only has a simple structure, low cost, and is easy to replace, but also does not require improvement to the structure of the sample suction needle. It can adapt to the use of sample suction needles with diameter changes within a certain range, and the rubber and silicone materials are easy to disinfect.

[0022] 4. This solution sets the mouth of the sample bottle to a flared shape, which makes it easier to insert the separation net group into the sample bottle. In addition, the flared mouth of the bottle is convenient for collecting the fibrin and blood clots shaken off the filter net. In actual use, the sample suction needle is taken out of the sample bottle and paused slightly above the sample bottle, so that the fibrin or blood clot can be better shaken off into the sample bottle. In order to prevent fibrin and blood clots from falling into other sample bottles, this solution uses a sample tray with a sample outlet channel. The sample bottle is pushed into the sample outlet channel and then the sample is aspirated. In this way, the process of shaking off the fibrin and blood clots after the separation net group is taken out is also carried out in the sample outlet channel, which can effectively prevent the fibrin and blood clots from falling into other sample bottles. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the structure of Embodiment 1 of the present invention, Figure 1 The separation network group is not shown.

[0024] Figure 2 Schematic diagram of the structure of the sample aspiration needle in Example 1 of the present invention.

[0025] Figure 3 This is a schematic diagram of the sample suction needle extending into the sample bottle in Example 1 of the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the separation network group in Example 1 of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the separation network group in Example 2 of the present invention. DETAILED DESCRIPTION

[0028] The following is further described in detail through specific implementation methods:

[0029] The figure marks in the drawings of the specification include: body 1, sample tray 2, sample suction hole 21, sample suction needle 3, reagent tray 4, reagent needle 5, cuvette 6, cleaning mechanism 7, cleaning inlet 71, separation net group 8, connecting sleeve 81, connecting rod 82, elastic member 83, filter net 84, sample bottle 9.

[0030] Example:

[0031] like Figure 1As shown, a blood testing device comprises a body 1, on which a sample tray 2, a sample suction needle 3, a reagent tray 4, a reagent needle 5, a cuvette 6 and a cleaning mechanism 7 are arranged, the sample tray 2 is connected to a sample outlet channel, a sample suction hole 21 is opened at the top of the sample outlet channel, a pushing mechanism for pushing a sample bottle 9 to the bottom of the sample suction hole 21 is arranged in the sample outlet channel, the cuvette 6 is arranged between the sample suction needle 3 and the reagent needle 5, and the sample suction needle 3 and the reagent needle 5 can both rotate, the sample suction needle 3 is used to suck a sample from a sample bottle 9 pushed into the sample outlet channel into the cuvette 6, the sample bottle 9 is positioned by the pushing mechanism after being pushed into the sample outlet channel, the reagent needle 5 is used to suck a reagent from a reagent bottle placed in the reagent tray 4 into the cuvette 6, and the cleaning mechanism 7 is used to clean the sample suction needle 3. In this embodiment, the sample tray 2, the sample suction needle 3, the reagent tray 4, the reagent needle 5, the cuvette 6, the cleaning mechanism 7, the sample outlet channel and the pushing mechanism all adopt the structures of existing blood testers, such as Beckman automatic biochemical analyzer.

[0032] Combination Figure 2 , Figure 3 and Figure 4 As shown, the sample suction needle 3 is detachably provided with a separation net group 8, and the separation net group 8 includes a connecting sleeve 81, a circular elastic filter net 84 and at least three connecting rods 82. The connecting sleeve 81 is a rubber sleeve or a silicone sleeve, and the filter net 84 is a rubber net or a silicone net. The diameter of the filter net 84 is larger than the inner diameter of the sample bottle 9, specifically 0.5-1 cm larger. The mouth of the sample bottle 9 is connected with a flared guide neck, the small diameter end of the guide neck is connected to the sample bottle 9, and the diameter of the large diameter end of the guide neck is larger than the diameter of the filter net 84. The mesh diameter of the filter net 84 is 0.05 mm, and the filter net 84 is flattened in the natural state. In this embodiment, the number of connecting rods 82 is four, and the four connecting rods 82 are divided into two in the middle and the upper and lower parts of the connecting rods 82 are connected by an arc-shaped elastic member 83, and the connecting rods 82 in the lower part are arranged to be tilted outward. The arc centers of the elastic member 83 are relatively arranged. In this embodiment, the elastic member 83 is a plastic strip, such as a metal sheet or a plastic sheet, which can bend within a certain range after being subjected to force and can be reset after the external force is removed. The connecting rod 82 is a corrosion-resistant alloy rod or a hard plastic rod. The top of the connecting rod 82 is fixed to the connecting sleeve 81 by gluing, and the bottom of the connecting rod 82 is glued and fixed to the filter screen 84 and arranged in an array with the center of the filter screen 84 as the center. In this embodiment, the connecting rod 82 is connected to the edge of the filter screen 84. The cleaning mechanism 7 includes a cleaning pool, a cover plate is installed above the cleaning pool, and a cleaning inlet 71 is opened on the cover plate. The diameter of the filter screen 84 is also larger than the diameter of the cleaning inlet 71.

[0033] A method of using a blood testing device is as follows:

[0034] The separated serum is placed in the sample bottle 9 and put into the sample tray 2. The sample tray 2 moves the designated sample bottle 9 to the sample outlet channel, and then is pushed to the bottom of the sample suction hole 21 by the pushing mechanism and fixed. The sample suction needle 3 is inserted into the sample bottle 9 from the sample suction hole 21 to suck the sample. When the sample suction needle 3 is inserted into the sample bottle 9, the separation net group 8 is inserted into the expanded guide neck before the sample suction needle 3. Since the four connecting rods 82 are connected to the edge of the filter net 84, and the diameter of the filter net 84 is larger than the diameter of the sample bottle 9, and the filter net 84 is elastic and the middle part of the connecting rod 82 is connected by the elastic member 83, as the expanded part of the guide neck shrinks, the lower half of the four connecting rods 82 gradually shrinks inward with the elastic member 83 as the fulcrum, thereby causing the filter net 84 to gradually shrink, so that the connecting rod 82 and the filter net 84 are smoothly inserted into the sample bottle 9. After the filter net 84 is inserted into the sample bottle 9, it blocks the bottom of the sample suction needle 3, which can effectively block the fibrin and blood clots in the serum from being sucked by the sample suction needle 3. Since the elastic member 83 is elastic, after the connecting rod 82 is inserted into the sample bottle 9, the lower half of the connecting rod 82 tends to expand outward and reset, and the lower half of the connecting rod 82 is tilted outward, so that the edge of the filter screen 84 is pressed against the inner wall of the sample bottle 9, which can better block fibrin and blood clots.

[0035] After the sample aspiration is completed, the sample aspiration needle 3 and the separation net group 8 are both taken out from the sample bottle 9. After being taken out, the lower half of the connecting rod 82 is no longer squeezed, and the lower half of the connecting rod 82 can expand outward and reset under the elastic recovery action of the elastic member 83, thereby straightening the filter net 84 and restoring the filter net 84 to a flattened state. During the resetting process, the filter net 84 can be shaken to a certain extent. If there is fibrin or blood clot attached to the filter net 84, it can be shaken off to a certain extent by shaking, which is convenient for subsequent cleaning.

[0036] Similarly, when the sample aspiration needle 3 is inserted into the cleaning tank for cleaning after the sample aspiration is completed, when the sample aspiration needle 3 passes through the cleaning inlet 71, the connecting rod 82 and the filter screen 84 can also be squeezed and contracted inward. When inserted into the cleaning tank after passing through the cleaning inlet 71, the filter screen 84 can be flattened again due to the resetting of the connecting rod 82, thereby shaking again, thereby enhancing the shaking-off effect of fibrin and blood clots, making cleaning more convenient and improving the cleaning effect.

[0037] Embodiment 2:

[0038] Combination Figure 4 As shown, the difference between this embodiment and the first embodiment is that the diameter of the circle surrounded by the multiple connecting rods 82 is smaller than the inner diameter of the sample bottle 9 and the cleaning inlet 71, that is, the multiple connecting rods 82 are not connected to the edge of the filter 84, but are connected to a circle with a diameter smaller than the diameter of the sample bottle 9, that is, the edge of the filter 84 is in a free state, and the filter 84 has a certain thickness, so that it can be in a natural state. Figure 4 The flattened state is shown in the figure, and in this embodiment, the connecting rod 82 adopts a whole connecting rod 82, and there is no need to split it into two parts and connect them with plastic parts.

[0039] In this embodiment, when aspirating samples, since the diameter of the circle enclosed by the connecting rod 82 is smaller than the diameter of the sample bottle 9, the connecting rod 82 can be directly inserted into the sample bottle 9, and the diameter of the filter screen 84 is larger than the inner diameter of the sample bottle 9. Therefore, during the insertion process, the edge of the filter screen 84 can be lifted up and close to the edge of the sample bottle 9 under the guiding action of the inclined surface of the inner wall of the guide neck. In this way, the filter screen 84 can also block fibrin and blood clots, and the edge of the filter screen 84 close to the inner wall of the sample bottle 9 can also better block fibrin and blood clots.

[0040] When the sample aspiration needle 3 and the separation net assembly 8 are removed after the sample aspiration is completed, the edge of the filter net 84 turns from the upturned state to the flat state, and this process can also cause the filter net 84 to vibrate to a certain extent, so this embodiment also has the effect of shaking off fibrin and blood clots. Similarly, when passing through the cleaning inlet 71, the filter net 84 can also vibrate again, further improving the cleaning effect.

[0041] Embodiment 3:

[0042] The difference between this embodiment and embodiment 1 is that the elastic member 83 is a spring bar, and the entire connecting rod 82 is covered with a protective sleeve, which is a silicone sleeve or a rubber sleeve. The use of the spring bar can also achieve the contraction and reset of the lower half of the connecting rod 82.

[0043] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A blood testing device, comprising a body, on which are arranged a sample tray, a sample suction needle, a reagent tray, a reagent needle, a cuvette and a cleaning mechanism, the cuvette being arranged between the sample suction needle and the reagent needle, the sample suction needle being used to suck a sample from a sample bottle placed in the sample tray into the cuvette, the reagent needle being used to suck a reagent from a reagent bottle placed in the reagent tray into the cuvette, and the cleaning mechanism being used to clean the sample suction needle, characterized in that: A separation net group is fixed on the sample suction needle, and the separation net group includes a connecting sleeve, a circular elastic filter net and at least three connecting rods. The top end of the connecting rod is fixed on the connecting sleeve, and the bottom end of the connecting rod is fixed on the filter net and is arranged in an array with the center of the filter net as the center. The diameter of the filter net is larger than the inner diameter of the sample bottle. The bottle mouth of the sample bottle is connected to a flared guide neck. The small diameter end of the guide neck is connected to the sample bottle, and the diameter of the large diameter end of the guide neck is larger than the diameter of the filter net. In a natural state, the filter net is flattened. The connecting rod and the filter net can be inserted into the sample bottle, and the edge of the filter net contacts the inner wall of the sample bottle when the filter net is inserted into the sample bottle.

2. A blood testing device according to claim 1, characterized in that: The cleaning mechanism comprises a cleaning pool, a cover plate is arranged above the cleaning pool, a cleaning inlet is opened on the cover plate, the diameter of the filter screen is larger than the diameter of the cleaning inlet, and the connecting rod and the filter screen can also be inserted into the cleaning inlet.

3. A blood testing device according to claim 2, characterized in that: The diameter of the circle surrounded by the multiple connecting rods is smaller than the inner diameter of the sample bottle and the cleaning inlet.

4. A blood testing device according to claim 2, characterized in that: The connecting rod is connected to the edge of the filter screen. The connecting rod is divided into two parts in the middle and the upper and lower parts of the connecting rod are connected by an arc-shaped elastic member. The arc centers of the elastic member are arranged relatively.

5. A blood testing device according to claim 4, characterized in that: The elastic member is a plastic sheet or a spring sheet.

6. A blood testing device according to claim 5, characterized in that: When the elastic member is a spring sheet, a protective sleeve is provided on the outer sleeve of the connecting rod.

7. A blood testing device according to any one of claims 1 to 6, characterized in that: The connecting sleeve is a rubber sleeve or a silicone sleeve, and the filter net is a rubber net or a silicone net.

8. A blood testing device according to claim 7, characterized in that: The sample tray is connected to a sample outlet channel, and a pushing mechanism for pushing the sample bottle to below the sample suction needle is arranged in the sample outlet channel.

9. A blood testing device according to claim 8, characterized in that: The mouth of the sample bottle is flared.

10. A blood testing device according to claim 9, characterized in that: The mesh diameter of the filter is 0.05 mm.

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