JP3023466U - Urine specific gravity measuring device - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To extract a fixed volume of collected urine using a syringe pump, calculate the weight of the collected urine from the difference between the weights before and after the withdrawal, and calculate the weight. The present invention relates to a urine specific gravity measuring device for calculating the specific gravity and volume of collected urine. SOLUTION: This urine specific gravity measuring device comprises a container for storing collected urine, a weighing means for measuring the weight of the collected urine put in the container, and a syringe pump for extracting a fixed volume of the collected urine from the container. , A dispensing pipe line connecting the container and a dispensing pipe line connecting the dispenser container via a switching valve provided at the mouth of the syringe pump are switchably provided, and connected to the weighing means. A specific gravity calculation unit for measuring the specific gravity of the collected urine and a dispensing calculation unit for determining the dispensing amount and the number of times of dispensing, and a controller for controlling the sampling control unit. By controlling the sampling control unit, a certain volume of the collected urine is sampled from the container when measuring the specific gravity, and when collecting, the sampled urine in the container is sampled and the sampled amount is sent to the container for dispensing. , In the gravity calculator,
It is configured to calculate specific gravity and volume.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of an apparatus for automatically measuring specific gravity and volume simply by inputting collected urine or the like.

[0002]

[Technical field to which the device belongs]

 Conventionally, a float hydrometer was used as a device to measure the specific gravity and volume of collected urine of patients admitted to hospitals, and the change in buoyancy caused by the difference in specific gravity from the liquid to be measured was measured by sinking the float. By doing so, the specific gravity is measured. However, in the above configuration, the float needs to be completely immersed 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 and the fluctuation of the liquid to be measured can cause errors, 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]

[Problems to be solved by the device]

 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 using a syringe pump, and to collect the amount extracted from the difference in weight before and after extraction. By calculating the weight of urine and calculating the specific gravity and volume of the collected urine based on this, it is possible to measure even a small amount of collected urine without using a float, etc. Another object of the present invention is to provide a urine specific gravity measuring device capable of dispensing or discharging collected urine.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the invention of the apparatus for measuring specific gravity of urine according to claim 1, a container for storing the collected urine, a weighing means for measuring the weight of the collected urine put in the container, and A syringe pump for extracting a fixed volume of collected urine, a switching valve provided at the mouth of the syringe pump, an extraction pipe line connecting the syringe pump and the container via the switching valve, and the switching valve. Syringe pump: A controller that has a specific gravity measuring unit that is connected to the weighing unit and that measures the specific gravity of the collected urine, and that also controls the sampling control unit. The controller controls the switching valve and the sampling control unit to determine the specific gravity. When measuring, connect the syringe pump and the sampling line to extract a fixed volume of the collected urine from the container.When dispensing, connect the sampling line and the syringe pump to collect the collected urine in the container. At the same time as withdrawing, the switching valve is switched to connect the pipe line and syringe pump, and the extracted amount is sent out to the container for dispensing. Weight and the weight of the collected urine remaining in the container after it has been extracted by the syringe pump, calculate the weight of the portion extracted by the syringe pump, and calculate the specific gravity together with the preset volume of the extracted portion. The technical measure is taken to calculate the volume of the collected urine based on the specific gravity. In addition to the above configuration, in the invention of claim 2, a discharge pipe line connected from the syringe pump to the discharge part via a switching valve is provided, and the controller controls the switching valve and the extraction control part to discharge the discharge gas. Occasionally, the extraction conduit and syringe pump are connected to extract the collected urine in the container, and the switching valve is switched to connect the discharge conduit and syringe pump to deliver the extracted amount to the discharge part. The technical means of becoming In addition, a cleaning means may be provided to introduce the cleaning liquid into the container. 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 calculating the specific gravity, the volume becomes an element, but this changes with temperature, so it is preferable to correct it.

[0005]

[Action]

 The weight (initial weight) of the collected urine put into the container is measured by a weighing means, and then a certain volume of the collected urine is taken out from the container by a syringe pump whose stroke is controlled by the sampling controller. Next, the weight of the collected urine remaining in the container after being taken out is measured by a 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 syringe pump 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. Furthermore, since the syringe pump is switchably connected to the extraction pipe and the dispensing pipe or the discharge pipe via the switching valve, by switching the switching valve, the specific gravity can be measured by the syringe pump. Not only can the collected urine be dispensed or further discharged using one syringe pump such as a syringe pump.

[0006]

[Embodiment of device]

 A preferred embodiment of the urine specific gravity measuring device 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 A syringe pump 4 having a pump configuration for extracting a fixed volume of collected urine from the container, a withdrawal conduit L1 from a container 2 switchably connected via a switching valve V connected to the syringe pump 4, and a dispensing container 5 And a discharge pipe line L3 connected to the discharge container 6.

In the present embodiment, the container 2 is set to a size capable of storing the collected urine, and has a temperature sensor S inside, and the temperature sensor S outputs the detected value to the controller 20. . The switching valve V is composed of a first switching valve V1 and a second switching valve V2 as shown in FIG. 2, and the syringe pump 4 can switch between the withdrawal pipe line L1 and the dispensing pipe line L2. A first switching valve V1 that is connected to the valve is provided, and a second switching valve V2 that branches the discharge pipeline L3 so as to be switchable is provided in the extraction pipeline L1. The controller 20 having a microcomputer configuration has a specific gravity calculation unit that is connected to the weighing unit 3 and measures the specific gravity of the collected urine, and includes the first and second switching valves V1 and V2 and the syringe pump 4. The sampling control unit 10 for controlling the control is connected in a controllable manner.

Further, the controller 20 is connected with an input means 11 such as a numeric keypad and an external display device 12 such as a printer or a liquid crystal display unit. 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, and the container 2 is supported on the strain sensor so that the weight can be measured.

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

[0012] Here, the extraction pipe line L1 is arranged so as not to be in full contact with the container 2 (without weight) so as not to affect the weighing. Further, a second switching valve V2 is provided in the extraction pipe line L1 and a discharge pipe line L3 is connected to the extraction pipe line L1, and the extraction pipe line L1 is connected to the syringe pump 41 or the discharge pipe line L3 is connected to the syringe pump 41. It is configured to switch to the alternative. 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 is selected. The configuration may be such that it can be connected to the syringe pump 41 by selectively switching.

Next, the operation of the specific gravity measuring apparatus for urine will be described based on the flowchart of FIG. First, the presence / absence of dispensing of collected urine and the number of samples for dispensing are input for each patient in advance by the input means 11. If this process is standardized, it may be stored in the memory of the controller 20 in advance. Then, the user puts the collected urine into the container 2 and inputs the code of the patient into the controller 20 by pressing the button in which the name of the patient is entered by the input means 11 (in this embodiment, a plurality of patients are The case of using it is illustrated, 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 calculation unit of the controller 20. Next, 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 calculation unit 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 set to a constant value (20 ml in this embodiment), this data is called. Then, the specific gravity is calculated from the extracted volume and weight. Here, the above-mentioned volume is the sum of the volumes inside the extraction conduit and the syringe pump 41, and may be measured in advance. Further, in the present embodiment, the temperature data of the collected urine is obtained from the temperature detecting unit S when measuring the specific gravity. That is, since the specific gravity of urine changes depending on the temperature change, it is necessary to correct the specific gravity to a normal value for comparison with a normal value. 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 calculation unit corrects the correct specific gravity based on the input temperature data from the calibration curve graph data showing the temperature characteristics of the urine specific gravity stored in the memory to the urine specific gravity at a reference temperature, for example, 20 ° C. calculate .

Next, based on the calculated specific gravity of the collected urine, the volume of the input collected urine is calculated from the weight of the input 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 the data for one day, for example, for each patient are output to the external display means 12 at any time. A liquid crystal display unit may be provided so that the measurement results can be displayed in real time. After the measurement, the liquid to be measured in the syringe pump 41 may be returned to the container 2 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 instruction is issued to the patient having the code, and if the instruction is issued, the dispensing operation is performed based on the instructed dispensing condition. The department determines the amount and frequency of dispensing. 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 L 1 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. The first switching valve V1 is switched so as to be connected, and the collected urine sucked by the syringe pump 41 is sent 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. At the time of 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), and calculates the number of times of discharging based on the calculated volume or the volume after dispensing, The extraction control unit 10 is instructed to suction the syringe pump 41.

It is also possible to adopt a configuration in which 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, connects the extraction line L1 and the syringe pump 41 at the time of measurement, and controls the second switching valve V2 at the time of discharge to control the discharge line L3. By switching to connect with the syringe pump 41, 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 from the container 7A into the container 2, and the pump 7B is controlled by a 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-described embodiment, an example is shown in which the withdrawal volume at the time of measurement is constant (20 ml in the embodiment). However, when the weight of the collected urine that is input is below a certain standard, the controller 20 An extraction amount determination calculation unit may be provided so that the extraction volume can be measured for each rank of weight by reducing it to, for example, 15 ml or 10 ml. Further, in the present embodiment, the syringe pump is used for sucking and delivering the collected urine in the container 2, but a known pump provided with a control unit capable of accurate suction from the container may be used.

In the above-described embodiment, the configuration in which the specific gravity of the collected urine is measured, dispensed, and discharged by using a single syringe pump is illustrated, but a discharging means may be separately provided. 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 collected urine is allowed to flow down by its own weight and sent to the discharging part, or other known drainage structure. Therefore, in this invention, the specific gravity of the collected urine is measured and dispensed using a single syringe pump (see FIG. 4), or the specific gravity of the collected urine is measured, dispensed, and washed. However, unnecessary configurations may be omitted in those cases. Of course, various design changes can be made without changing the easiness of the invention.

[0021]

[Effect of device]

 According to this invention, the weight of the collected urine remaining in the container after extracting a predetermined volume of the collected urine with the syringe pump is subtracted from the weight of the collected urine in the container before the extraction, and the collected sample is collected. Since the weight of urine can be obtained and the specific gravity can be calculated together with the known volume, the specific gravity can be accurately calculated even when the collected urine required for the measurement is small. In addition, by using a syringe pump, it is possible to measure the specific gravity and dispense, and also to discharge, with a simple structure, which is extremely beneficial.

[Brief description of 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 same embodiment.

FIG. 3 is a flowchart showing a usage procedure.

FIG. 4 is a block diagram showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Urine specific gravity measuring device 2 ... Container 3 ... Weighing means 4 ... Syringe pump 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 (5)

[Scope of utility model registration request] 1. A container for storing collected urine, a weighing means for measuring the weight of the collected urine put in the container, a syringe pump for extracting a fixed volume of the collected urine from the container, and a mouth portion of the syringe pump. A switching valve provided in, a withdrawal conduit connecting the syringe pump and the container via the switching valve, a dispensing pipe connecting the syringe pump and the dispensing container via the switching valve, A sampling control unit that controls the stroke of the switching valve and the plunger of the syringe pump, a specific gravity calculation unit that is connected to the weighing unit to measure the specific gravity of the collected urine, and a dispensing calculation that determines the dispensing amount and the number of dispensings. And a controller that controls the extraction control unit, and the controller controls the switching valve and the extraction control unit to connect the syringe pump and the extraction pipe line when measuring the specific gravity, Or A certain volume of the collected urine is withdrawn, and at the time of dispensing, the withdrawal line and the syringe pump are connected to withdraw the collected urine in the container, and the switching valve is switched to connect the dispensing line and the syringe pump. Then, the extracted amount is sent to a container for dispensing, and the specific gravity calculator calculates the weight of the collected urine put in the container,
Calculate the weight of the portion extracted by the syringe pump from the difference in the weight of the collected urine remaining in the container after being extracted by the syringe pump, 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. 2. A container for storing the collected urine, a weighing means for measuring the weight of the collected urine put in the container, a syringe pump for extracting a fixed volume of the collected urine from the container, and a mouth portion of the syringe pump. A switching valve provided in, a withdrawal conduit connecting the syringe pump and the container via the switching valve, a dispensing pipe connecting the syringe pump and the dispensing container via the switching valve, A discharge pipe line connected from the syringe pump to the discharge unit via the switching valve, a sampling control unit for controlling the stroke of the switching valve and the plunger of the syringe pump, and a specific gravity of the collected urine connected to the weighing means. The controller has a controller for controlling the sampling control unit, which has a specific gravity calculation unit for measurement and a dispensing calculation unit for determining the dispensing amount and the number of times of dispensing, and the controller controls the switching valve and the sampling control unit. When measuring the specific gravity, connect the syringe pump and the sampling urine to extract a fixed volume of the collected urine from the container.When dispensing, connect the sampling urine and the syringe pump to collect the urine in the container. At the same time as withdrawing, the switching valve is switched to connect the dispensing pipe line and the syringe pump, and the extracted amount is sent out to the dispensing container.When discharging, the extraction pipe line and the syringe pump are connected. The collected urine in the container is drained, and the switching valve is switched to connect the drain line and the syringe pump to send the drained amount to the draining unit. The weight of the collected urine collected,
Calculate the weight of the portion extracted by the syringe pump from the difference in the weight of the collected urine remaining in the container after being extracted by the syringe pump, 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. 3. A first switching valve for connecting a withdrawal pipe line or a dispensing pipe line to a syringe pump, and a switching pipe for connecting a withdrawal pipe line or a dispensing pipe line branching from the withdrawing pipe line to a syringe pump. The urine specific gravity measuring device according to claim 2, comprising a second switching valve. 4. The urine specific gravity measuring device according to claim 1 or 2, further comprising a cleaning means for introducing a cleaning liquid into the container. 5. 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 urine specific gravity measuring device according to claim 1, 2, 3, or 4.