WO2010087120A1 - 自動分析装置、及び検体処理装置 - Google Patents
自動分析装置、及び検体処理装置 Download PDFInfo
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- WO2010087120A1 WO2010087120A1 PCT/JP2010/000213 JP2010000213W WO2010087120A1 WO 2010087120 A1 WO2010087120 A1 WO 2010087120A1 JP 2010000213 W JP2010000213 W JP 2010000213W WO 2010087120 A1 WO2010087120 A1 WO 2010087120A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
- G01N35/1016—Control of the volume dispensed or introduced
Definitions
- the present invention relates to an automatic analyzer that performs qualitative / quantitative analysis of a biological sample such as blood and urine, and a sample processing apparatus that applies a process such as centrifugation to a sample so that the analysis can be performed by the automatic analyzer.
- the present invention relates to an automatic analyzer having a dispensing mechanism for dispensing a predetermined amount of a sample, and a specimen processing apparatus.
- Patent Document 1 proposes a technique for performing a dispensing operation after the liquid level fluctuation is settled based on the knowledge that the liquid level fluctuation in the nozzle affects the dispensing accuracy.
- a time during which the liquid level fluctuation will be settled is set in advance, and the dispensing operation is performed after stopping the dispensing nozzle for that time.
- the time for the liquid level fluctuation to settle may vary depending on the amount of sample to be dispensed, and may also vary depending on physical properties such as the viscosity of the sample. Accordingly, if the setting is made so that any sample can be stably dispensed, it is necessary to stop the dispensing nozzle for a long time, which may cause a decrease in analysis ability.
- An object of the present invention is to provide an automatic analyzer and a sample processing apparatus capable of accurately dispensing even a minute amount in an automatic analyzer and a sample processing apparatus having a dispensing mechanism.
- the detection function can be set so that the discharge operation can be started by setting the number of confirmations, confirmation time, amplitude value, etc. If the pressure fluctuation does not fall within the range, the detection function can be used to generate an alarm.
- the state of the specimen (aspiration / discharge / liquid level fluctuation) can be confirmed directly from the output signal of the pressure sensor by the detection function.
- the discharge operation can be performed after the pressure fluctuation caused by the fluctuation of the liquid level caused by the movement operation of the dispensing head falls within a certain range, and a highly accurate discharge amount can be discharged.
- by adding control for suppressing the fluctuation of the liquid level it is possible to shorten the stop time for eliminating the pressure fluctuation due to the fluctuation of the liquid level within a certain range.
- the present invention is a method of dispensing treatment in a system that performs automatic centrifugation, removal of a blood collection tube stopper, and serum subdivision as a pretreatment of blood collected for blood tests in hospital laboratories and laboratories.
- An embodiment of a detection function of a sample processing apparatus having a dispensing mechanism will be described with reference to an embodiment shown in FIGS.
- FIG. 1 is a diagram illustrating an example of the configuration of a dispensing head of a sample processing apparatus.
- nozzle base 9 attached to the casing 15, a nozzle chip 10 attached to the nozzle base 9, a bellows device 100 for sucking and discharging a specimen, and a suction
- a pressure sensor 7 that converts a pressure change during discharge (internal pressure in a cavity 13 (described later) of the casing 15) into an electric signal
- a diaphragm 6 that is a vibration source for vibrating the internal air when the liquid level is detected
- a diaphragm 6 and a signal processing circuit 8 for exchanging electrical signals between the pressure detector 7, the motor 4, and the solenoid 5.
- the casing 15 includes cavities 12 and 13 which are air passages communicating with the space inside the bellows 1 through the air holes 14 in addition to the space for accommodating the bellows 1.
- the cavities 12 and 13 are connected to the external space via the nozzle base 9 and the nozzle tip 10. For example, when the nozzle tip 10 is inserted into the specimen and the bellows 1 is extended, the specimen 18 passes from the tip hole to the nozzle tip 10. Sucked inside. Since the dispensing head 200 is moved while the sample 18 is held in the nozzle tip 10, the sample in the nozzle tip 10 is shaken. This fluctuation can be detected as a variation of the pressure signal.
- the signal processing circuit 8 is connected to an external signal processing circuit (not shown), and performs signal detection / dispensing processing / abnormality processing by a microprocessor or the like.
- the liquid level of the specimen can also be detected by the method disclosed in Japanese Patent Laid-Open No. 2005-207898.
- FIG. 8 shows an example of the relationship between the movement operation of the dispensing head and the output signal of the pressure sensor 7 in the suction / discharge operation of the sample processing apparatus.
- the suction operation (201)
- the inside of the dispensing head changes in pressure, and the change in pressure of the pressure sensor is detected. Since the dispensing process of the next process is performed after the suction process is completed, the movement is performed when the dispensing head moves to the X axis, the Y axis, and the Z axis (not shown) at the ejection position (202). Accordingly, a large pressure change occurs, and the discharge operation (203) is performed before the pressure change is settled.
- FIG. 9 is an example showing the relationship of the output signals of the pressure sensor in the suction / discharge operation of the automatic analyzer.
- the pressure of the pressure sensor changes due to the suction operation (201), and then a slight pressure change occurs during the movement operation (202) in which the dispensing mechanism moves to the discharge position. Operation (203) is performed.
- the present invention directly monitors the pressure change of the pressure sensor mounted on the dispensing mechanism. In particular, since the pressure change before discharge affects obtaining a highly accurate discharge amount, the pressure before discharge is monitored, and it is determined that the change in pressure has been eliminated, and then the discharge operation is performed. Realizes high-precision dispensing performance.
- FIG. 3 is a flow chart of an embodiment for explaining the operation with respect to the change of the pressure signal due to the liquid level fluctuation of the sample in the nozzle tip.
- the fluctuation of the pressure signal due to the liquid level fluctuation of the sample 18 in the nozzle tip 10 due to the movement operation of the dispensing head 200 is directly monitored, and there is no fluctuation of the pressure signal (liquid level fluctuation) before the start of the discharge operation.
- the suction operation is started (301), and the pressure signal fluctuates by sucking the specimen 18 into the nozzle chip 10.
- the output signal of the pressure sensor 7 fluctuates due to the fluctuation of the liquid level.
- the variation of the pressure signal is directly monitored (303), and if the pressure signal varies (304), loop processing is executed until there is no variation in the pressure signal in the nozzle chip 10.
- the discharge operation is started (305) when it is confirmed that the pressure signal in the nozzle chip 10 no longer varies (304). Further, after the discharge operation is completed (306), when there is a discharge operation in the next process (307), the pressure signal variation in the nozzle tip 10 is confirmed again (303) (304), and when the pressure signal variation disappears Repeat the process of performing the discharge operation.
- FIG. 4 shows the relationship between the dispensing head moving operation and the pressure sensor output signal in the suction / discharge operation using the detection function.
- the detection function the output signal of the pressure sensor 7 is directly monitored before the discharge operation (203) after the dispensing head is moved (202), and the dispensing head operation is performed in order to determine the presence or absence of pressure fluctuation of the pressure sensor.
- the discharge operation 203 is performed.
- the liquid level fluctuation in the nozzle tip 10 can be eliminated, and a highly accurate sample amount can be discharged.
- the liquid level fluctuation state confirmation can be automatically corrected by monitoring the pressure fluctuation.
- FIG. 5 is a flow diagram of an embodiment in the case where conditions are used for the processing of pressure signal fluctuation in the operation for the pressure signal change due to the liquid level fluctuation of the sample in the nozzle tip.
- the alarm flag may be displayed as an alarm (not shown) on the apparatus, or may be displayed (not shown) on the main operation unit to notify the operator.
- a condition (501) for confirming the fluctuation of the pressure signal the same correspondence can be achieved by setting the monitoring time 503 of the pressure fluctuation, the amplitude value 504 of the fluctuation, and the like.
- FIG. 6 and FIG. 7 are one example of a diagram showing the structure of a dispensing head that suppresses the fluctuation of the liquid level and the effect when the fluctuation of the liquid level is suppressed.
- a method for directly monitoring the output signal of the pressure sensor 7 and controlling the fluctuation of the pressure signal liquid level fluctuation
- two proposals are shown as examples.
- the period (frequency) is calculated therefrom, and the frequency calculated using the diaphragm 6 (vibrator) is canceled.
- the vibration of the diaphragm 6 can suppress the fluctuation of the pressure signal.
- the bellows 1 when the bellows 1 is used and the fluctuation of the pressure signal in the nozzle tip 10 is amplified from the positive pressure to the negative pressure direction, the bellows 1 is driven in the contraction direction by driving the motor 4 to apply a reverse pressure, When the opposite negative pressure is amplified in the positive pressure direction, the fluctuation of the pressure signal can be suppressed by driving the motor 4 in the expansion / contraction direction of the bellows 1. In this way, by suppressing the fluctuation of the liquid level during the dispensing head movement operation (202), not only a more accurate discharge amount is discharged, but also the pressure fluctuation due to the fluctuation of the liquid level before the discharge operation is eliminated within the range. (701) can be shortened.
- FIG. 10 shows a configuration example of an automatic analyzer to which the present invention is applied.
- a sample disk 37 on which a plurality of sample containers 34 for holding a sample can be mounted, a first reagent disk 41 and a second reagent disk 42 on which a plurality of reagent containers 40 for holding a reagent can be mounted, and a plurality of reaction containers 35 are arranged on the circumference.
- the sample dispensing head 200 a is connected to the metering pump 71 via the tube 72, and the pressure detector 7 is installed in the middle of the tube 72.
- the same metering pump and pressure detector are also connected to the first reagent dispensing head 200b and the second reagent dispensing head 200c.
- the sample dispensing head 200a is attached to a drive mechanism 73 that can move up and down and rotate.
- the device of this embodiment operates as follows.
- a sample object such as blood is placed in the sample container 34 and set in a sample disk 37.
- the type of analysis required for each sample is input to the controller 60.
- a sample collected by the sample dispensing head 200a is dispensed into the reaction container 35 arranged on the reaction disk 36, and a certain amount of reagent is dispensed from the reagent container 40 installed on the reagent disk 41 or 42. It is dispensed by the head 20 or 21 and stirred by the stirring device 30.
- the reaction disk 36 is periodically rotated and stopped, and photometry is performed to detect the output signal of the spectroscopic optical system 51 at the timing when the reaction vessel 35 passes in front of the light source 50.
- Photometry is repeated during a reaction time of 10 minutes, and then the reaction liquid in the reaction vessel 35 is discharged and washed by the vessel washing mechanism 45. In the meantime, in another reaction vessel 35, operations using different samples and reagents are performed in parallel. Based on the photometric results obtained during the reaction time, the computer 61 calculates the concentration of the target substance in the sample and outputs the result.
- the sample is dispensed as follows.
- the internal flow paths of the metering pump 71, the tube 72, and the sample dispensing head 200a are filled with water.
- the driving device 73 rotates to move the sample dispensing head 200a onto the sample container 34, and the metering pump 71 is aspirated to suck a small amount of air at the tip of the sample dispensing head 200a.
- the driving device 73 is lowered to insert the sample dispensing head 200a into the sample in the sample container 34, and the metering pump 71 is suctioned to suck a part of the sample into the dispensing head.
- the drive mechanism 71 is raised, rotated, and lowered to insert the sample dispensing head 200 a into the reaction vessel 35.
- the change in pressure in the flow channel during operation is measured by the pressure detector 7 and data is sent to the controller 60.
- the controller 60 analyzes the pressure fluctuation, issues a command to the metering pump 71 after it falls within a predetermined change, and starts discharging.
- the drive mechanism 73 moves up and rotates. The inside and outside of the flow path of the sample dispensing head 200a are washed by a washing mechanism (not shown) to prepare for the next dispensing.
- Reagent dispensing is performed in the same procedure as sample dispensing.
- the distance from the metering pump 71 to the sample dispensing head 200a is long, and the flow path therebetween is filled with water, so that the vibration caused by the movement of the sample dispensing head 200a and the operation of other mechanisms. Inertia force acts on the water in the flow path, causing pressure fluctuation. Further, water, contained bubbles, and flow path components are elastic bodies, and their volume changes due to pressure fluctuations. However, since the discharge operation is performed after the pressure fluctuation has subsided, the vibration does not affect the accuracy of the dispensing, the dispensing can be performed with high accuracy, and the concentration of the target substance can be analyzed accurately. .
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Abstract
Description
2,3 永久磁石
4 モータ
5 ソレノイド
6 ダイアフラム
7 圧力検出器
8 信号処理回路
9 ノズル基部
10 ノズルチップ
11,12,13 空洞
14 空気孔
15 ケーシング
16 ベローズ駆動機構
17 付勢手段
18 検体
34 サンプル容器
35 反応容器
36 反応ディスク
37 サンプルディスク
40 試薬容器
41 第1試薬ディスク
42 第2試薬ディスク
45 容器洗浄機構
50 光源
51 分光光学系
60 コントローラ
61 コンピュータ
71 定量ポンプ
72 チューブ
73 駆動装置
100 ベローズ装置
200 分注ヘッド
201 吸引動作
202 分注ヘッド移動動作
203 吐出動作
301 吸引開始
302 吸引完了
303 圧力変動監視
304 圧力変動有無
305 吐出開始
306 吐出完了
307 次工程判別
401 停止
501 確認条件
502 監視回数
503 監視時間
504 変動振幅値
505 アラーム
701 停止
Claims (8)
- 試料を分注するノズルと、該ノズル内の圧力を変化させる圧力変化機構と、該ノズルを移動させるノズル移動機構と、を備えた自動分析装置において、
前記ノズル内の圧力を検出する圧力検出機構と、該圧力検出機構の出力に基づいて圧力変動を算出する圧力変動算出機構と、該液面揺れ算出機構の出力に基づいて前記ノズル移動機構を制御する制御機構を備えたことを特徴とする自動分析装置。 - 請求項1記載の自動分析装置において、
前記圧力変動算出機構の出力が予め定めた値以下になった時に、前記ノズル移動機構を移動させるように前記制御機構が動作することを特徴とする自動分析装置。 - 請求項1記載の自動分析装置において、
前記圧力変動算出機構液面揺れ算出機構の出力が予め定めた時間内に、予め定めた値以下にならない場合はその旨を表示する表示手段を備えたことを特徴とする自動分析装置。 - 請求項1記載の自動分析装置において、
前記圧力変動算出機構の出力に基づいて、液面揺れを打ち消すように前記ノズル内に圧力を加える圧力印加機構を備えたことを特徴とする自動分析装置。 - 試料を分注するノズルと、該ノズル内の圧力を変化させる圧力変化機構と、該ノズルを移動させるノズル移動機構と、を備えた検体処理装置において、
前記ノズル内の圧力を検出する圧力検出機構と、該圧力検出機構の出力に基づいて圧力変動を算出する圧力変動算出機構と、該液面揺れ算出機構の出力に基づいて前記ノズル移動機構を制御する制御機構を備えたことを特徴とする検体処理装置。 - 請求項5記載の自動分析装置において、
前記圧力変動算出機構の出力が予め定めた値以下になった時に、前記ノズル移動機構を移動させるように前記制御機構が動作することを特徴とする自動分析装置。 - 請求項5記載の自動分析装置において、
前記圧力変動算出機構液面揺れ算出機構の出力が予め定めた時間内に、予め定めた値以下にならない場合はその旨を表示する表示手段を備えたことを特徴とする自動分析装置。 - 請求項5記載の自動分析装置において、
前記圧力変動算出機構の出力に基づいて、液面揺れを打ち消すように前記ノズル内に圧力を加える圧力印加機構を備えたことを特徴とする自動分析装置。
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JP2010548394A JP5331824B2 (ja) | 2009-01-30 | 2010-01-18 | 自動分析装置、及び検体処理装置 |
US13/146,582 US8545757B2 (en) | 2009-01-30 | 2010-01-18 | Automatic analyzer and sample treatment apparatus |
CN201080005883.5A CN102301242B (zh) | 2009-01-30 | 2010-01-18 | 自动分析装置及检测体处理装置 |
DE112010002270T DE112010002270B4 (de) | 2009-01-30 | 2010-01-18 | Automatischer Analysator und Probenbehandlungsvorrichtung |
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- 2010-01-18 CN CN201080005883.5A patent/CN102301242B/zh active Active
- 2010-01-18 DE DE112010002270T patent/DE112010002270B4/de active Active
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JP2013057514A (ja) * | 2011-09-07 | 2013-03-28 | Hitachi High-Technologies Corp | 分注装置 |
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DE112010002270T5 (de) | 2012-12-06 |
CN102301242A (zh) | 2011-12-28 |
CN102301242B (zh) | 2014-07-23 |
JPWO2010087120A1 (ja) | 2012-08-02 |
JP5331824B2 (ja) | 2013-10-30 |
US8545757B2 (en) | 2013-10-01 |
US20120039771A1 (en) | 2012-02-16 |
DE112010002270B4 (de) | 2013-10-17 |
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