JPH09101251A - Method and apparatus for measuring specific gravity of urine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for measuring the specific gravity of urine by extracting a specified quantity of sampled urine using an extracting means, calculating the weight of extracted sample urine from the difference of weight before and after sampling and then calculating the specific gravity and volume of extracted urine on the basis of the calculated weight of extracted urine. SOLUTION: The apparatus 1 for measuring the specific gravity of urine comprises a container 2 for urine sample, means 3 for weighing a urine sample thrown into the container, means 4 for extracting or delivering a specified volume of urine sample in the container, an extraction pipe line L1 to be coupled with the container and a dispensation pipe line L2 to be coupled with a dispensation container 5 while being switched through a switching valve 1 disposed at the mouth of extraction means. The apparatus 1 further comprises an operating section 1 for measuring the specific gravity of urine sample connected with the weighing means 3, a dispensation operating section for determining the quantity and the number of times of dispensation, and a controller 20 tar controlling an extraction control section 10. The controller 20 controls the switching valve and the extraction control section to extract a constant volume of urine sample from the container in measuring the specific gravity, and to extract the urine sample and feed the extracted sample to the dispensation container in dispensation, and the specific gravity operating section calculates the specific gravity and volume.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method and apparatus for automatically measuring specific gravity and volume simply by adding collected urine or the like.

[0002]

2. Description of the Related Art Conventionally, a float type hydrometer is used as a device for measuring the specific gravity and volume of collected urine of a patient hospitalized in a hospital, and buoyancy caused by the difference in specific gravity between the liquid to be measured and the float being submerged. The specific gravity is measured by measuring the change in. However, in the above configuration, the float needs to be completely submerged in the liquid to be measured, and therefore the liquid to be measured must be at least larger than the volume of the float. On the other hand, the volume of the thread that suspends the float, the fluctuation of the liquid to be measured, and the like are error factors, so the float cannot be made too small in order to improve the measurement accuracy. Therefore, a substantial amount of collected urine is required to be 30 cc or more, and there is a drawback that measurement cannot be performed when the amount of collected urine at one time is small.

[0003]

The present invention was devised in view of the above circumstances, and its main problem is to extract a certain volume from the collected urine, and to extract it based on the difference in weight before and after extraction. By calculating the weight of the collected urine and calculating the specific gravity and volume of the collected urine based on this, the specific gravity of urine that does not require a float and can be measured even with a small amount of collected urine It is to provide a measuring method and an apparatus.
Another object of the present invention is to provide a urine specific gravity measuring method and device capable of dispensing or discharging collected urine by using specific gravity measuring extraction means.

[0004]

In order to solve the above problems, in the invention of the method for measuring the specific gravity of urine according to claim 1, the container for storing the collected urine and the weight of the collected urine put in the container are It consists of weighing means for measuring and extracting means for extracting a fixed volume of the collected urine from the container, and a step of measuring the weight of the collected urine put in the container, and a constant amount of collecting urine from the container by the extracting means. The volume sampling step, the step of measuring the weight of the collected urine remaining in the container after the sampling, and the weight of the collected urine remaining after the sampling is subtracted from the weight of the collected urine put in the container. A step of calculating the weight of the extracted portion, a step of calculating the specific gravity of the collected urine based on the constant volume of the portion extracted by the extracting means and the weight,
And the step of calculating the volume of the collected urine based on the calculated specific gravity. According to the invention of claim 2, in addition to the above configuration, a withdrawal conduit connecting the container and the withdrawing means, a dispensing conduit connecting the withdrawing means with the dispensing container, and an withdrawing conduit for the withdrawing means. A switching valve that switches the connection between the pipe and the dispensing pipe is provided.When a dispensing command is issued, the dispensing amount and the number of times of dispensing are determined by the dispensing calculation unit, and the dispensing pipe is connected via the switching valve. There is provided a step of connecting the extracting means and extracting the collected urine in the container, and switching the switching valve to connect the dispensing pipe line and the extracting means to deliver the extracted portion to a container for dispensing. , Is taken as a technical means. In addition to the above-described configuration, in the invention of claim 3, in addition to the extraction pipe line and the dispensing pipe line, a discharge pipe line that connects the extraction unit and the discharge container is provided, and the discharge pipe line for the extraction unit is separated. A switching valve that switches the connection between the injection pipe and the discharge pipe is provided, and when a discharge command is issued, the extraction pipe and the extraction means are connected to extract a predetermined amount and the switching valve is switched to the discharge pipe. The technical means of providing a step of connecting the discharging means and the discharging means and sending the discharged amount extracted by the discharging means to a container for discharging is taken. In the invention of the urine specific gravity measuring apparatus according to claim 4, a container for storing the collected urine, a weighing means for measuring the weight of the collected urine put in the container, and an extracting means for extracting a fixed volume of the collected urine from the container And a controller for controlling the extraction control section, which has a withdrawal conduit connected from the container to the withdrawing means and a specific gravity measuring means connected with the weighing means for measuring the specific gravity of the collected urine, The specific gravity calculation unit, the difference between the weight of the collected urine put into the container by the specific gravity measuring means and the weight of the collected urine remaining in the container after being extracted by the extracting means, the portion extracted by the extracting means The technical means is adopted in which the weight is calculated, the specific gravity is calculated together with the volume of the extracted portion preset in the extraction means, and the volume of the collected urine is calculated based on the specific gravity. According to the invention of claim 5, in addition to the above configuration, a switching valve for switchingably connecting the extraction pipe or the dispensing pipe and the extraction means, and an extraction control unit for controlling the switching valve and the extraction means. A controller for controlling the sampling control unit, which has a specific gravity calculation unit connected to the weighing unit to measure the specific gravity of the collected urine and a dispensing calculation unit for determining the dispensing amount and the number of times of dispensing. , The controller controls the switching valve and the extraction control unit to connect the extraction means and the extraction pipe line when measuring the specific gravity,
A certain volume of the collected urine is withdrawn from the container, and at the time of dispensing, the withdrawal line and the withdrawing means are connected to withdraw the withdrawal urine in the container, and the switching valve is switched to dispense and withdrawal means. Is connected and the extracted amount is sent to a container for dispensing, which is a technical means. In the invention of claim 6, in addition to the above configuration, a discharge pipe line connected to the discharge container from the extraction unit, and the extraction pipe line, the dispensing pipe line or the discharge pipe line and the extraction unit are switchably connected. And a controller for controlling the selector valve and the extraction control unit,
At the time of discharge, the extraction pipe line and the extraction means are connected to extract the collected urine in the container, and the switching valve is switched to connect the discharge pipe line and the extraction means to make the extracted amount into a container for discharge. The technical means of sending it out is taken. In addition, a cleaning means may be provided to introduce the cleaning liquid into the container. As an example, the extraction means is a syringe pump. The switching valve is a first switching valve that connects the extraction pipe line or the dispensing pipe line to the syringe pump, and a second switching valve that connects the discharge pipe line branched from the extraction pipe line or the dispensing pipe line to the syringe pump. May consist of Further, when the specific gravity is calculated, the volume is an element and changes depending on the temperature, so it is preferable to correct the specific gravity.

[0005]

The weight of the collected urine put into the container is measured by the weighing means, and then the collected urine is taken out from the container by a predetermined amount by the extracting means. Next, the weight of the collected urine remaining in the container after being taken out is measured by the weighing means. Then, the weight of the collected urine remaining after the extraction is subtracted from the weight of the collected urine put in the container to calculate the weight of the extracted portion. Since the volume extracted by the extractor is preset, the specific gravity of the collected urine can be calculated based on the weight and volume extracted. Here, in order to correct the influence of the temperature of the volume, it is preferable to measure and correct the temperature of the collected urine by the temperature detection unit. Further, the volume can be calculated from the weight of the collected urine put into the container based on the specific gravity calculated in this way. Further, since the extracting means is switchably connected to the extracting pipeline and the dispensing pipeline via the switching valve or further to the discharging pipeline, by switching the switching valve, only the specific gravity can be measured by the extracting means. Instead, the collected urine can be dispensed or further discharged using a single extraction means such as a syringe pump.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the urine specific gravity measuring apparatus of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the urine specific gravity measuring device 1 includes a container 2 for storing collected urine, a weighing means 3 for measuring the weight of the collected urine put in the container 2, and a container 2 Connected to a dispensing means 4 having a pump structure for extracting a fixed volume of collected urine, a withdrawal conduit L1 from a container 2 switchably connected via a switching valve V connected to the withdrawing means 4, and a dispensing container 5. It has the dispensed pipe line L2 and the discharge pipe line L3 connected to the discharge container 6.

In this embodiment, the container 2 is set to a size capable of storing the collected urine, and has a temperature sensor S therein, and the temperature sensor S outputs the detected value to the controller 20. . Further, the switching valve V has a first switch as shown in FIG.
No. 1 switching valve V1 and a second switching valve V2, and the withdrawing means 4 is provided with a first switching valve V1 for switchingably connecting the extraction pipe line L1 and the dispensing pipe line L2. A second switching valve V2 that branches the discharge pipe L3 so as to be switchable is provided in the extraction pipe L1. The controller 20 having a microcomputer configuration has a specific gravity calculation unit that is connected to the weighing unit 3 to measure the specific gravity of the collected urine, and has the first and second switching valves V1 and V2 and the extracting unit 4 described above.
A sampling control unit 10 that controls the and is controllably connected.

Further, the controller 20 is connected with an input means 11 such as a ten-key pad and an external display device 12 such as a printer or a liquid crystal display. Further, in this embodiment, the cleaning means 7 for introducing the cleaning liquid into the container 2 is provided, and is similarly controlled by the controller 20. The container 2 for storing the collected urine is placed on the weighing means 3.
The weighing means 3 uses a strain sensor in this embodiment,
The container 2 is supported thereon so that the weight can be measured.

Next, the extracting means 4 comprises a syringe pump 41 capable of sucking and discharging in this embodiment, and a DC incorporating a pulse motor or a rotary encoder.
The plunger of the syringe pump is fixed to a housing box that is screwed up and down by being screwed into a spiral screw driven by a motor or the like having a rotation angle detection means configured to be stopped at a predetermined rotation angle such as a motor. The actuator 42 controls the stroke, that is, the suction amount, and accurate control is possible. The syringe pump 41 is connected to the withdrawal pipeline L1 and the dispensing pipeline L2 via the first switching valve V1. First in the illustrated example
The switching valve V1 is configured to selectively switch the connection between the syringe pump 41 and the withdrawal pipeline L1 or the connection between the syringe pump 41 and the dispensing pipeline L2.

Here, the extraction pipe line L1 is arranged so as not to come into contact with the container 2 (without weight) so as not to affect the weighing. In addition, the sampling line L1
Is provided with a second switching valve V2 and is connected to a discharge conduit L3, and the connection between the discharge conduit L1 and the syringe pump 41 or the connection between the discharge conduit L3 and the syringe pump 41 is selectively switched. Has become. In the present embodiment, two switching valves V1 and V2 are provided respectively, but one switching valve is provided and any one of the extraction pipe line L1, the dispensing pipe line L2 and the discharge pipe line L3 can be selected. The configuration may be such that it can be connected to the syringe pump 41 by switching to.

Next, the operation of the urine specific gravity measuring apparatus will be described with reference to the flowchart of FIG. First, input means 1 in advance
With 1, the presence or absence of dispensing of collected urine for each patient and the number of samples when dispensing are input. If this process is standardized, it may be stored in the memory of the controller 20 in advance. Then, the user inputs the collected urine into the container 2 and inputs the code of the patient into the controller 20 by pressing a button in which the name of the patient is entered by the input means 11 (in this embodiment, a plurality of patients use it. The case is shown as an example, but it is not necessary for one person).

In the controller 20, first, the weight of the collected urine put in the container 2 is measured by the weighing means 3, and the measurement result is input to the specific gravity calculating section of the controller 20. Then
The extraction control unit 10 is controlled to pull the plunger of the syringe pump 41 by a preset stroke for measurement (a full stroke in this embodiment) to suck the collected urine in the container 2.

Next, the weight of the collected urine remaining in the container 2 after the withdrawal is measured by the weighing means 3, and is input to the specific gravity calculating section of the controller 20. The specific gravity calculation unit calculates the weight of the extracted portion from the difference in the weight of the collected urine in the container 2 before and after the extraction. On the other hand, since the volume of the collected urine sampled is previously fixed (20 ml in this embodiment), this data is called. Then, the specific gravity is calculated from the extracted volume and weight. Here, the volume is
It is the sum of the volume inside the sampling pipe and the syringe pump 41, and may be measured in advance. In this embodiment, further, temperature data of the collected urine is obtained from the temperature detecting section S when measuring the specific gravity. That is, since the specific gravity of urine changes with changes in temperature,
For comparison with a normal value, it is necessary to correct the specific gravity value at a certain reference temperature. Therefore, the detected temperature data is input to the controller, and the value calculated by the specific gravity calculation unit is further corrected by the correction calculation unit. The correction calculator is
Based on the input temperature data, the calibration curve graph data showing the temperature characteristics of the urine specific gravity stored in the memory is corrected to a urine specific gravity at a reference temperature, for example, 20 ° C. to calculate a correct specific gravity.

Next, based on the calculated specific gravity of the collected urine, the volume of the collected collected urine is calculated from the weight of the initial value of the collected urine in the container 2. The specific gravity and the volume thus calculated are temporarily stored in the memory together with the sampling date and time, and at any time, for example, one day's worth of data for each patient is displayed on the external display means 12.
Is output to A liquid crystal display unit may be provided so that the measurement result can be displayed in real time. The liquid to be measured in the syringe pump 41 may be returned to the container 2 after the measurement, or may be delivered as the first time of the later-described dispensing or discharging.

Next, the controller 20 determines whether or not a dispensing command has been issued to the patient having the code, and if a command has been issued, the dispensing computing unit is based on the instructed dispensing conditions. Determine the amount to be dispensed and the number of dispenses. The controller issues a command to the withdrawal control unit 10 to control the stroke of the syringe pump 41 based on the determined dispensing amount and the number of times, and the syringe pump 41 sucks a predetermined amount.
At this time, the extraction control unit 10 controls the first switching valve V1, connects the extraction line L1 and the syringe pump 41 at the time of measurement, and connects the dispensing line L2 and the syringe pump 41 at the time of dispensing. Thus, the first switching valve V1 is switched to deliver the collected urine sucked by the syringe pump 41 to the dispensing container 5.

Then, the dispensing containers 5 are sequentially replaced by rotation of the turntable or the like, and the above procedure is repeated until the determined number of dispensings (the number). When the dispensing is completed or there is no dispensing command, the controller 20 determines that the dispensing is performed and drains the collected urine in the container 2. When discharging,
The controller 20 sets the stroke amount of the plunger of the syringe pump 41 to a predetermined movement amount (full stroke in the embodiment), obtains the number of discharges based on the calculated volume or the volume after dispensing, and sends it to the extraction control unit 10. Instruct and suction with the syringe pump 41.

It is also possible that the weight in the container is measured by the weighing means 3 and the suction of the syringe pump 41 is repeated until the weight is zero, without predetermining the number of discharges. At this time, the controller 20 controls the first switching valve V1 and connects the extraction line L1 and the syringe pump 41 at the time of measurement,
At the time of discharging, the second switching valve V2 is controlled to switch to connect the discharge conduit L3 and the syringe pump 41, and all the collected urine in the container 2 is sent to the discharge container 6.

When the discharge is completed, automatic cleaning is performed in this embodiment. The cleaning means 7 is composed of a cleaning container 7A containing a cleaning liquid and a pump 7B for feeding the cleaning liquid into the container 2 from the container 7A. The pump 7B is controlled by the controller 20. That is, the controller 20 controls the pump 7B to introduce a certain amount of the cleaning liquid into the container 2 from the cleaning container 7A containing the cleaning liquid after the discharge is completed. After the introduction, the controller 20 discharges the cleaning liquid in the same volume as the discharging procedure, and returns to the measurement standby state. As a result, the inside of the pipeline can be cleaned together with the container 2.

In the above-mentioned embodiment, an example is shown in which the withdrawal volume at the time of measurement is constant (20 ml in the embodiment), but when the weight of the collected urine input is below a certain standard, the withdrawal amount is given to the controller 20. A determination calculation unit may be provided so that the extraction volume can be reduced for each rank of weight, for example, 15 ml and 10 ml so that measurement can be performed.
Further, in the present embodiment, the syringe pump is used for sucking and discharging the collected urine in the container 2, but a known pump or discharging / injecting device provided with a control unit capable of accurate suction from the container may be used. . Further, if only specific gravity is to be measured, the extracting means may be any as long as it can only extract, and a known extracting device may be used.

In the above-mentioned embodiment, in addition to the construction in which the specific gravity of the collected urine is measured by using a syringe pump as a single suction or ejection means, a dispensing and discharging of the collected urine,
Further, although the structure for cleaning the container is illustrated, the structure may be such that the extracting means is not used at the time of discharging. In the case of discharging without using a syringe pump, it is possible to use a structure in which an opening / closing port is provided in the container and the stored urine is allowed to flow down by its own weight to be sent to the discharging part, or other known drainage structure.
Therefore, in the present invention, the specific gravity of the collected urine is measured and dispensed using a single suction or ejection means (a syringe pump as an example) (see FIG. 4), or the specific gravity of the collected urine is measured. The measurement, dispensing and cleaning may be performed, and in those cases, unnecessary configurations are omitted. In addition, it goes without saying that various design changes can be made without changing the easiness of the present invention.

[0021]

According to the present invention, the weight of the collected urine remaining in the container after extracting a predetermined volume of the collected urine by the extracting means is subtracted from the weight of the collected urine in the container before the extraction. Since the specific gravity can be calculated together with the known volume by obtaining the weight of the collected urine sampled, the specific gravity can be accurately calculated even if the sampled urine required for the measurement is small. Further, by using a syringe pump or other pump, the specific gravity can be measured and dispensed and the discharge can be performed with a simple structure, which is extremely useful.

[Brief description of the drawings]

FIG. 1 is a block diagram of a urine specific gravity measuring apparatus according to a preferred embodiment of the present invention.

FIG. 2 is a block diagram showing the embodiment.

FIG. 3 is a flowchart showing a usage procedure.

FIG. 4 is a block diagram showing a different embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Urine specific gravity measuring device 2 ... Container 3 ... Weighing means 4 ... Extraction means 5 ... Dispensing container 6 ... Discharge container 7 ... Cleaning means 10 ... Extraction control part 20 ... Controller 41 ... Syringe pump V1 ... 1st switching valve V2 ... 2nd switching valve L1 ... Extraction pipeline L2 ... Dispensing pipeline L3 ... Discharge pipeline

Claims (11)

[Claims] 1. A container comprising: a container for storing the collected urine; a weighing means for measuring the weight of the collected urine put in the container; and an extracting means for extracting a fixed volume of the collected urine from the container. The step of measuring the weight of the collected urine put in the container, the step of extracting a fixed volume of the collected urine from the container by the sampling means, and the step of measuring the weight of the collected urine remaining in the container after the sampling And a step of calculating the weight of the extracted urine by subtracting the weight of the collected urine remaining after extraction from the weight of the collected urine put in the container, and a constant volume of the amount extracted by the extracting means. A method for measuring specific gravity of urine, comprising: a step of calculating the specific gravity of the collected urine based on the weight; and a step of calculating the volume of the collected urine based on the calculated specific gravity. 2. A container for storing the collected urine, a weighing means for measuring the weight of the collected urine put in the container, an extracting means for extracting a fixed volume of the collected urine from the container, and a container and an extracting means. It consists of a sampling pipe to be connected, a dispensing pipe that connects the sampling means and the dispensing container, and a switching valve that switches the connection between the sampling pipe and the dispensing pipe to the sampling device. The step of measuring the weight of the collected urine collected, the step of extracting a fixed volume of the collected urine from the container by the extracting means, the step of measuring the weight of the collected urine remaining in the container after the extraction, The step of calculating the weight of the extracted urine by subtracting the weight of the collected urine remaining in the container after the extraction from the weight of the collected urine put in the container, and the constant volume extracted by the extracting means, , Calculating the specific gravity of the collected urine based on the weight and The step of calculating the volume of the collected urine from the calculated specific gravity and the weight measured by the weighing means, and when there is a dispensing command, the dispensing calculation unit determines the dispensing amount and the number of dispensing times. , The sampling pipe and the sampling means are connected via the switching valve to collect the collected urine in the container, and the switching valve is switched to connect the dispensing tube and the sampling means to separate the extracted amount. A method for measuring the specific gravity of urine, comprising the step of delivering to a container for injection. 3. A container for storing the collected urine, a weighing means for measuring the weight of the collected urine put in the container, an extracting means for extracting a fixed volume of the collected urine from the container, and a container and an extracting means. Extraction pipeline to be connected, dispensing pipeline to connect the extraction means and the dispensing container, discharge pipeline to connect the extraction means and the discharge container, extraction pipeline and dispensing pipeline to the extraction means and discharge It consists of a switching valve that switches the connection with the pipeline, a step of measuring the weight of the collected urine put in the container, a step of extracting a fixed volume of the collected urine from the container by the extracting means, and a step after extracting The step of measuring the weight of the collected urine remaining in the container, and subtracting the weight of the collected urine remaining in the container after extraction from the weight of the collected urine put in the container, The step of calculating the weight and one of the parts extracted by the extracting means. There is a step of calculating the specific gravity of the collected urine based on the volume and the weight, a step of calculating the volume of the collected urine from the calculated specific gravity and the weight measured by the weighing means, and a dispensing command. At this time, the dispensing amount measuring means determines the dispensing amount and the number of times of dispensing, and the sampling pipe and the sampling means are connected through the switching valve to drain the collected urine in the container and the switching valve The process of switching and connecting the dispensing pipe and the extracting means to send out the extracted amount to the container for dispensing, and connecting the extracting pipe and the extracting means when there is a discharge command. Specific gravity measurement of urine, which comprises a step of sampling a fixed amount, switching a switching valve, connecting a discharge pipe line and a sampling means, and sending the discharged amount extracted by the sampling means to a container for discharging Method. 4. A temperature detecting section for measuring the temperature of the collected urine put in the container is provided, and when the specific gravity is calculated, the temperature data obtained by the temperature detecting section is used for correction. The method for measuring the specific gravity of urine according to claim 1, 2 or 3. 5. A container for storing the collected urine, a weighing means for measuring the weight of the collected urine put in the container, an extracting means for extracting a fixed volume of the collected urine from the container, and a connecting means from the container The specific gravity calculation unit of the controller has a specific gravity measuring unit that is connected to the weighing unit and has a specific gravity measuring unit that measures the specific gravity of the collected urine and that controls the sampling control unit. With the weight of the collected urine put in the container, and the difference in the weight of the collected urine remaining in the container after being taken out by the extracting means, the weight of the portion extracted by the extracting means is calculated,
A specific gravity measuring device for urine, characterized in that the specific gravity is calculated together with the volume of the preset amount of extraction means, and the volume of the collected urine is calculated based on the specific gravity. 6. A container for storing the collected urine, a weighing means for measuring the weight of the collected urine put in the container, a discharging means capable of discharging a fixed volume of the collected urine from the container and discharging the urine from the container. A withdrawing conduit connected to the withdrawing means, a dispensing conduit connected with the dispensing container from the withdrawing means, and a switching valve connecting the withdrawing conduit or the dispensing conduit with the withdrawing means in a switchable manner, It has a sampling control section for controlling the switching valve and the sampling means, a specific gravity calculation section connected to the weighing section for measuring the specific gravity of the collected urine, and a dispensing calculation section for determining the dispensing amount and the number of dispensings. At the same time, the controller controls the sampling control unit, and the controller controls the switching valve and the sampling control unit.When measuring specific gravity, the sampling means and sampling line are connected to collect the urine from the container. Extract a fixed volume, and when dispensing, The pipe and the extracting means are connected to extract the collected urine in the container, and the switching valve is switched to connect the dispensing pipe and the extracting means to deliver the extracted amount to the container for dispensing. In the specific gravity calculation unit, the weight of the collected urine put in the container,
Calculate the weight of the portion extracted by the extracting means from the difference in the weight of the collected urine remaining in the container after being extracted by the extracting means, and calculate the specific gravity together with the preset volume of the extracted portion, An apparatus for measuring the specific gravity of urine, wherein the volume of collected urine is calculated based on the specific gravity. 7. A container for storing the collected urine, a weighing means for measuring the weight of the collected urine put in the container, a discharging means for discharging a fixed volume of the collected urine from the container and discharging the urine from the container. A sampling pipe connected to the sampling device, a dispensing pipe connected to the dispensing container from the sampling device, a discharge pipe connected to the discharging container from the sampling device, the sampling pipe and the dispensing pipe Alternatively, a switching valve that connects the discharge conduit and the withdrawing means in a switchable manner, a withdrawal control section that controls the switching valve and the withdrawing means, a specific gravity calculating section that is connected with the weighing means and measures the specific gravity of the collected urine, In addition to having a dispensing calculation unit that determines the dispensing amount and the number of dispensings, and a controller that controls the sampling control unit, the controller controls the switching valve and the sampling control unit, and when measuring specific gravity, Connect the extraction means and the extraction pipe line, and A fixed volume of collected urine is extracted from the container, and at the time of dispensing, the extraction conduit and the extraction means are connected to extract the collected urine in the container, and the switching valve is switched to connect the distribution conduit and the extraction means. Then, the extracted amount is sent to a container for dispensing, and at the time of discharging, the extracting pipe line and the extracting means are connected to extract the collected urine in the container, and the switching valve is switched to form the discharging pipe line. The extraction means is connected and the extracted amount is sent to a container for discharge, and in the specific gravity calculation unit, the weight of the collected urine put in the container,
Calculate the weight of the portion extracted by the extracting means from the difference in the weight of the collected urine remaining in the container after being extracted by the extracting means, and calculate the specific gravity together with the preset volume of the extracted portion, An apparatus for measuring the specific gravity of urine, wherein the volume of collected urine is calculated based on the specific gravity. 8. The urine specific gravity measuring device according to claim 5, 6 or 7, further comprising a cleaning means for introducing a cleaning liquid into the container. 9. The urine specific gravity measuring device according to claim 5, 6, 7 or 8, wherein the extracting means comprises a syringe pump. 10. A switching valve connects a first switching valve that connects the extraction pipe line or the dispensing pipe line to a syringe pump, and a discharge pipe line that branches from the extraction pipe line or the dispensing pipe line to the syringe pump. The urine specific gravity measuring device according to claim 9, comprising a second switching valve. 11. A temperature detecting section for measuring the temperature of collected urine put in a container is provided, and when the specific gravity is calculated, the temperature data obtained by the temperature detecting section is used for correction. The urine specific gravity measuring device according to claim 5, 6, 7, or 8.