WO1995022999A1

WO1995022999A1 - Automatic urinary output measuring device

Info

Publication number: WO1995022999A1
Application number: PCT/JP1995/000152
Authority: WO
Inventors: Tomoo Ueda
Original assignee: Itec Co., Ltd.
Priority date: 1994-02-28
Filing date: 1995-02-06
Publication date: 1995-08-31

Abstract

An automatic urinary output measuring device which is a medical measuring instrument. Particularly, in the automatic urinary output measuring device according to the invention for measuring and recording a minutely urinary output of a patient and the total urinary output in real time, a diaphragm type piezoelectric drive pump and an infrared transmission type water level sensor are used in combination whereby a urinary channel itself provided with a predetermined tube can be easily attached to and detached from the urinary output measuring device while being kept airtight to the atmosphere. Further, it is possible to realize a urinary output measuring device of a constant volume discharge type, in which a location where a constant amount of urine is collected is provided by providing a bypass passage (47) and a weir (33) in a fluid section (1) constituting the urinary channel, and which malfunctions less frequently. Further, it is possible to simultaneously measure and record a urinary conductivity and the total urinary conductivity and the total urinary conductivity by providing measuring electrodes at the location where a constant amount of urine is collected. A distance (b) between the electrodes in urine is made smaller than that (a) in a sealing member whereby the construction of the electrodes is made hard to be affected in sealing performance. The urinary output measuring device having the above features can be easily subjected to a hygiene control, and is highly convenient to use.

Description

Specification

Automatic urine meter

The present invention relates to a medical measuring device. In particular, a urinary catheter is inserted into the patient, and the urine volume per minute and total urine volume and the urine conductivity and total urine conductivity are measured in real time and recorded in an automatic urine meter. Background art

In the past, the patient's urine was guided to a container similar to a graduated cylinder or a graduated urine storage pack, and the measurer visually checked or weighed to record the patient's urine volume. The electrical conductivity of urine was measured with a conductivity meter or pH meter after the urine was collected. Therefore, among urine data, the total urine conductivity (total urine volume x urine conductivity) must be calculated off-line based on the time-varying measurement values, and real-time measurement display is difficult. Was.

Recently, as described in Japanese Patent Application No. 5-2050510, a monitoring system for monitoring the status of infusion patients and postoperative patients has emerged. Is responsible for transmitting the patient's medical urine data to a central computer in real time in such a monitoring system. The condition monitoring system adjusts the infusion flow and drug solution to optimize the patient's water balance (infusion volume minus urine volume) and conductivity balance (infusion conductivity minus urine conductivity). Controlled.

As described in Japanese Patent Application Laid-Open No. 57-176656, a conventional automatic urine meter is provided with a means for discharging urine every time a certain amount of urine is collected, so that minute urine volume and total urine can be measured. Amount of sewage Was output to the computer.

The disadvantage of such a conventional automatic urine meter is that cleaning and sterilization of the urinary tract inside the main body are complicated. In other words, it was necessary to spend time disassembling and assembling the device in order to sterilize the area in the urine meter where urine comes into contact.

In addition, urine must be quickly discharged in order to follow the urine flow rate, and a vent that opens the urinary tract to atmospheric pressure was required, which was a concern for contamination and accidents related to hygiene management.

An automatic urine meter that measures the urine weight of each urine storage pack reduces the above-mentioned contamination problem, but not only cannot measure the true urine volume, but also has the urine remaining in the urine collection tube. The quantity is prone to measurement errors. In addition, when an electrode for urine conductivity measurement is installed in a urine-conducting tube, urine is not always inside the urine-conducting tube, and the minimum amount of urine required to fill the electrode is collected. A special structure was required. In addition, since a small weight is measured, it is susceptible to disturbance vibration, and the resolution of urine volume measurement could not be improved with a portable waste meter installed on the bedside.

In any case, the conventional automatic urine meter has problems such as sealing of the urine flow path due to contamination, and difficulty in cleaning and sterilization before and after use.

Therefore, the present invention provides an automatic urine meter that maintains the tightness of the urinary tract during urine measurement and also facilitates sterilization (or disposable or recycle use) of the urinary tract before and after use. It is intended to be.

Another object of the present invention is to provide an automatic urine meter which directly measures the volume of urine and has a small measurement error.

Furthermore, the present invention provides a medical urine for a patient including urine conductivity simply by placing an automatic urine meter connected to the input (catheter side) and output (urine pack side) urine tubes on the patient bedside. The purpose is to provide a portable automatic urine meter that can record and display data in real time. Disclosure of the invention

The present invention has a detecting device that detects that a certain amount of urine has accumulated, and a discharge device that discharges the accumulated urine, and discharges urine every time a certain amount of urine accumulates. In an automatic urine meter that calculates and displays the following, a place where a certain amount of urine accumulates, a place where the urine is discharged, a place where air to be replaced at the time of urine discharge, and a urinary tract in the discharge device are disposed with respect to the atmosphere. The urine tube for input and output is connected and the urine tube for input and output can be easily attached and detached from the detection device and the discharge device at the same time. In other words, there is no need to wash or disassemble the entire urine meter body, and only the urinary tract can be removed for cleaning and disinfection. <This makes the automatic urine meter easy to use.

In addition, a bypass passage and a weir are provided in the fluid part serving as the urinary tract, and only the urine that has passed over the weir is guided to the place where the predetermined amount is collected. As a result, the urine flowing from the urinary catheter is separated into air and urine itself, and the volume of urine free from air can be measured. In addition, even if the urine flow rate changes suddenly due to unexpected tube contraction caused by the patient turning over, the averaged urine flow rate can be measured by temporarily releasing excess urine to the space of the bypass passage. Also, there is no worry that urine will overflow even if a power failure occurs.

In addition, by installing a urine electrical conductivity detection electrode in a place where a certain amount of the urine is collected, the urine conductivity and the total urine conductivity are calculated and displayed in addition to the minute urine volume and the total urine volume. to _Φ this conductivity detection electrode place without bubbles in the urinary tract means location Kukoto, no data loss of urine conductivity. In addition, the minimum volume of the conductivity measurement can be conveniently matched to the resolution of the urine volume, and a highly functional automatic urine meter for control of the conductivity gap can be provided.

Further, in the method of installing the conductivity detecting electrode, the distance between the electrodes formed in the urinary tract is shorter than the distance between the electrodes formed in the urinary tract wall. This allows the urine tract wall and metal electrodes ^

The effect of the sealing performance with the seal is reduced, and a highly accurate automatic urine meter can be provided even with a simple sealing structure.

FIG. 1 is a diagram showing the entire flow path from urine collection to urine collection, including the automatic urine meter according to the present invention.

Figure 2 is a front view showing a mounting state of the urinary tract of the automatic urine meter of the present invention _c

FIG. 3 is an enlarged view showing a method of holding down a measuring tube and a sensor light path. <FIG. 4 is a front view showing a partial cross section of a fluid part.

FIG. 5 is a plan view of the fluid part excluding a lid.

FIG. 6 is a side view of the fluid part.

FIG. 7 is an enlarged view showing the electrode structure of the measuring tube.

FIG. 8 is a block diagram showing a configuration of a control circuit.

FIG. 9 is a front view showing the front door of the automatic urine meter.

FIG. 10 is a diagram showing a print format output by the automatic urine meter. FIG. 11 is a timing chart for explaining a control operation. BEST MODE FOR CARRYING OUT THE INVENTION

In order to explain the present invention in more detail, it will be described with reference to the drawings of FIG. 1 to FIG.

FIG. 1 is a view showing a complete urine flow path from urine collection to urine collection, including a urinary tract which is attached and detached by the automatic urine meter of the present invention, and also shows a method of connecting a waste tube. In FIG. 1, the urine of a patient is poured from a bladder indwelling catheter 3 via a urinary tube 5 to a fluid part 1 of an automatic urine meter. Urine from the fluid section 1 is stored in the urine storage pack 4 via the urine tube 6. _r

0

-There is a joint part for connection of the valve, so it can be easily connected by hand.

In addition, an electrode for measuring urine conductivity is provided below the measuring tube 17 of the fluid part 1, and a cord 7 with a connector is connected to electrically transmit a signal. Also, _beta diaphragm portion 2 to be mounted on a piezoelectric-driven pump in a vertical direction of the fluid portion 1 are connected respectively to the suction tube 8 discharge tube 9

FIG. 9 is a front view of the urine meter when the front door 10 is closed. The automatic urine meter according to the present invention has four feet 25, can be moved by grasping the handle 28, and can be installed on the patient's side. Patients are usually collected on bed (approximately 60 cm above the floor) and urine packs are placed just above the floor. Therefore, the urine meter is placed at the height between the urinary catheter and the urine storage pack.

During the measurement of urine data, in Fig. 1, the urine flow path in Fig. 1 has only openings at the catheter tip and the top surface of the urine storage pack. Have been. In other words, the urinary tract is considered to form a siphon tube. Therefore, as the urinary tract is filled with urine except in the initial stage of urine tube connection, the pressure in the urinary tract becomes negative and the risk of urine leakage is reduced.

The fluid section 1 and the diaphragm section 2 are mounted in the urine meter with the tubes (5 and 6) attached as shown in FIG. Fig. 2 shows the urine meter with its front door 10 opened with the left hinge 11; the middle plate 18 on the holiday is the piezoelectric pump body 20 and the water level sensors 13, 14 respectively. And connector with cord 7 power 'female connector for insertion 19 power fixed. As will be described in detail below, the two water level sensors are detection devices that detect that urine has accumulated at a certain fidelity, and work as a discharge device to discharge urine accumulated in the piezoelectric pump.

In FIG. 2, the piezoelectric pump 20 has a structure in which the lid of the pump body opens to the front right centering on the hinge 21, and a polypropylene diaphragm 2 is used. This is a diaphragm-type piezoelectric drive pump mounted inside the D-pump, and has a structure in which the diaphragm can be replaced. The pump body lid is fixed with lock fittings 22. In the figure, reference numeral 23 denotes an AC power cord for driving the pump. Each of the input and output sides in the diaphragm 2 is provided with a check valve (not shown), and discharges urine by vibrating force due to the piezoelectric effect. The manufacturer of the piezoelectric drive pump 20 and the diaphragm unit 2 used in the present invention is Bimol Co., Ltd. in Japan, and the models are BPE-413 and ED-30D, respectively.

In FIG. 2, the fluid part 1 is positioned and supported by a structure (position 16) to which the water level sensors 13 and 14 are fixed. When the front door 10 is closed, as shown in Fig. 3, the measuring pipe 17 at the runaway part is a member 15 fixed to the middle plate 18 of the main body and a member 12 fixed to the front door. And the fluid part is fixed. In addition, below the fluid part 1 in Fig. 2, the bottom of the urine meter is open in a U-shape (illustration omitted), so that the input / output tubes 5 and 6 can be opened even when the front door 10 is closed. Can be extended to the outside through the gap between the bottom of the sewage meter and the foot 25. The front door is opened and closed with a pull tab 27 and a fixing bracket 26.

As described above, by simply opening the front door 10 of the automatic urine meter and removing the stopper 22 and the connector 19, only the urine flow path shown in Fig. 1 can be used without removing the connection tube. , Can be taken out. Conversely, as long as the urine tube is connected from the catheter to the urine collection pack, it can be mounted on the urine meter as it is. In other words, the urinary tract of the urine meter can be easily attached and detached.

Next, the flow of urine in the fluid part 1 according to the present invention will be described. FIG. 4 is a front view including a cross-sectional view of the fluid part 1, FIG. 5 is a plan view excluding the top cover 30, and FIG. Is a side view.

In FIG. 4, urine flowing from the sewage introducing tube 5 enters the input section 31. In the input section 31, the urine flow proceeds from bottom to top. Urine that has passed through the weir 33 at the input section is guided to the measurement pipe 17 via the introduction pipe 36 and the joint section 38. Introductory pipe The upper blade-shaped plate 35 is for separating air and urine, and serves to prevent air mass from being mixed into the measuring tube. In the measuring tube, the electric conductivity of urine is measured by the electrode 39, and the water level in the measuring tube is measured by the water level sensors 13 and 14. The two water level sensors 13 and 14 are a combination of an infrared light emitting diode with a wavelength of 900 nm and a photodiode, and have a U shape as shown in 13 in Fig. 3. in an embodiment of the _Φ present invention the sensor light path is formed in the vicinity of its tip, the measuring tube 1 7 Ri Do a transparent acrylic pipe, infrared緣transmission level sensor Japan Takenaka electronic industry Corporation model PU- 7 1 2 9 D is used. In FIG. 4, the internal volumes of the measurement tube and the introduction tube surrounded by the extension of the optical paths 40 and 41 formed by the respective sensors serve as reference volumes for urine volume measurement. The optical path of the sensor in the cross section direction of the measuring tube is shown by a two-dot chain 緣 41 in Fig. 3. The presence or absence of urine is determined.

Also, at the input section 31 in FIG. 4, when urine passes over the weir 33 and further passes over the bottom surface 32 of the bypass passage 47, urine proceeds from the bypass passage 47 to the output section 48 of the fluid section 1. Excreted from urine tube 6. In addition, when the urinary tube 5 is stepped on by mistake, or when there is an instantaneous acceleration caused by a patient's body movement or the like, the urine blown up at the input portion temporarily enters the bypass passage. When the urine water level temporarily drops below the weir 33, the water level in the input unit 31 or the urine introduction tube 5 decreases, but the water level in the measurement tube is not affected. In this way, the weir 33 averages the inflowing urine flow rate.

As shown in Figs. 5 and 6, the space inside the measurement pipe 17 is connected to the space of the bypass passage by the passage 50 at the center upper part of the bypass passage, and the upper part of the fluid part is always sealed from the atmosphere. The trapped air will remain. The passage 50 is located higher than the bottom of the bypass passage. O

The space generated by the eruptions and bubbles generated in 4.8 will reach the measuring tube via the passage 50, thereby preventing the malfunction of the water level sensor. Also, since the bypass passage is larger than the urinary tube, the residual air is not easily discharged from the fluid part. The measuring tube is as shown in FIG. 4, the optical path 4 1 upper is a double pipe, that has a gradient structure toward the upper tip 3 4 ^force? Front of Chikaratsu inner tube. Therefore, water droplets generated on the inner wall of the upper part of the measuring tube are collected and fall along the tip of the measuring tube in front of the measuring tube. In FIG. 3, arrows 45 indicate the locations where the water droplets fall. In other words, the water level sensor 1 is unlikely to malfunction because water drops fall away from the sensor optical path 41.

Now, the normal operation of the waste meter will be described. When the water level in the measuring tube reaches the optical path 41 after passing through the optical path 40 as the urine flows, the piezoelectric pump 20 is driven. In FIG. 4, the accumulated urine is sucked into the diaphragm part 2 of the piezoelectric pump via the suction tube 42 and the suction tube 8, and is discharged to the storage portion 49 via the discharge tube 9 and the discharge tube 43. You. Further, the bottom portion of the suction pipe 4 2 is in the upper portion of the electrode 3 9, even if the discharge operation force too far piezoelectric ^pump?, Will not be eliminated urine around conductivity detection electrodes 3 9.

Then, when the water level in the measuring tube falls below the optical path 40, the driving of the piezoelectric pump is stopped. This operation is repeated every time urine flows in, and the amount of urine can be calculated by multiplying the number of times the pump is driven by the reference volume described above. The minute urine volume can be calculated by counting the time required for the water level to pass from the optical path 40 to the optical path 41.

In FIG. 4, as the urine continues to be discharged, the urine accumulated in the storage unit 49 moves over the weir 44 to the output unit 48, and then drops from the urine tube 6 to the urine storage pack. In the storage unit 49, urine is temporarily left and air is separated upward. In addition, the upper hole 46 of the discharge pipe 43 is located higher than the optical path 41, preventing the siphon phenomenon when the piezoelectric pump is not driven and preventing the pump from leaking in the forward direction. Eliminate quantity. It is not unfortunate to take measures to prevent the generation of bubbles at the time of discharge, such as dividing the end of the discharge pipe 43 vertically or along the pipe wall. In addition, as described above, the generated bubbles rise in the output section 48 with time and enter the bypass passage 47 soon. There is a height and distance up to the vent 50 of the measuring tube, and bubbles do not reach the measuring part at the normal urine flow rate.

FIG. 7 is an enlarged view showing an installation position of the electrode 39. In FIG. 7, a cylindrical sealing member 60 to which metal electrodes 39 are press-fitted at appropriate intervals is fixed to a measuring tube 17 by an electrode holding screw 61 via an O-ring 62, and is sealed. Closed. Although not shown, the lower end of the electrode is soldered to an electrode to form a signal code 7. As shown in the figure, the electrode 39 is shaped like a brush, and the distance b between the electrodes formed by the electrodes inside the urinary tract is shorter than the distance a between the electrodes formed by the electrodes on the urinary tract wall. It has a structure. In measuring the electrical conductivity of a liquid, the conductivity is affected not only by the distance and surface area of the opposing electrode, but also by the shape of the liquid around the electrode, which is formed in a closed container. In particular, the gap between the electrode and the sealing member for fixing the electrode is important. If the gap is not completely sealed, the conductivity during the measurement will change over time as the urine penetrates into the sealed area. Thus, hermetic seals may be suitable for this seal, but not for metals and alastics. In the present invention, by a horsetail type as shown the structure of a rod-shaped electrode in FIG. 7, in a sealed Impact _Φ present invention is to鞋減of the sealing member 6 0 electrode is Arasuchikku First, the polycarbonate and the electrodes on the sealing member were simple structures consisting of a base metal plated with a noble metal and bonded with an epoxy resin. Power was stable over a long period of time.

FIG. 6 shows a stopper 30 and a calibration solution inlet 29 when the inside of the urinary tract is brought to atmospheric pressure for the calibration of urine conductivity. If conductivity calibration is required, open the front door 10 without removing the urine tubes (5 and 6>). Can be. The reference solution for calibration is loosened from the lid 29 and injected from the inlet 29 with a needleless syringe. The reference liquid is discharged by loosening the stopper 30 and sucking again from the inlet 29 with the above-mentioned syringe. The above-mentioned injection and discharge of the reference solution are performed before the usual measurement, and it goes without saying that the stoppers 29 and 30 are kept closed during the measurement.

Most of the electrolytes in human urine are sodium. The electrical conductivity of urine may be considered as the sodium ion concentration of saline with the same impedance. Therefore, in the automatic urine meter according to the present invention, urine conductivity is displayed as an equivalent concentration of sodium chloride (mEq / 1). The total urine conductivity is expressed as the equivalent amount of sodium chloride (mEq) (m is 1 / 1,000). For example, if 1.8 g of sodium chloride is dissolved in 200 ml of pure water (physiological saline), the molecular weight of sodium chloride is 58.5 g, so the total urine conductivity is 1.8 / 58.5 X 1000 = 30.8 mEq, and the urine conductivity is expressed as 1.8 / 200 X 1000 / 58.5 x l 000 = 154 mEq / l. Also, if the (physiological) saline solution assumed in this urine is discharged at a flow rate of 9 Om1Z, the urine volume per minute is expressed as 1.5 mlZ, and the total urine volume discharged per day is 2 It is 16 Om 1. Therefore, the total urine conductivity excreted in one day is 154 x 90/1 000 x 24 = 332.64 mEq.

The operation of the automatic urine meter according to the present invention will be described with reference to a block diagram shown in FIG. 8 and a timing chart shown in FIG.

In FIG. 8, the time measurement is based on the clock cycle generated by the oscillation circuit S0. The clock cycle is added by counters 82 and 83, and the result is taken into CPU 93. As shown in Fig. 8, urine impedance (X) is obtained by applying a constant voltage (E) AC power supply 1 of 1 KHz to the electrode 39 and changing the detection voltage (V) across the detection resistor (R) 71, as shown in Fig. 8. By measuring, X = R (E-V) ZV. Therefore, urine conductivity (1ZX) is 1ZX = V / R (E- V) and can be measured. In FIG. 8, the AC detection voltage (V) is rectified 73 through a waveform shaping circuit 72, converted into a DC voltage 74, converted into a digital value by an A / D converter 75, and read into the CPU.

8 and 11, when the measuring tube urine water level 37 exceeds the sensor light path 40 (0 c c), the control circuit 90 opens the gate 81, and the counters 82 and 83 start counting time. When the urine water level reaches the sensor light path 41 (1 c c) 86, the CPU issues an AZD start signal 76 and the AZD conversion is started. When the conversion is completed 77, the CPU reads the numerical value (Cn) corresponding to the urine conductivity at that time. n indicates the number of times the piezoelectric pump has been driven. The CPU resets 84 after reading the count value (An) of counter A82. These two values (Cn and An) are temporarily stored in the RAM 78. Immediately after the storage is completed, the CPU 93 outputs an ON signal 88 to the pump drive circuit 89, and urine discharge is started. Then, when the urine water level falls to the optical path 40, the driving of the piezoelectric pump is stopped. The control circuit 90 detects rising and falling of the water level from the output signal after the waveform shaping. When the water level rises again after the pump stops and crosses the optical path 40, the CPU receives an interrupt signal 87, reads the value (Bn) of the counter B83, and resets 85. The AZD conversion value <C n) and A / D conversion time read in this way, the count value (An) corresponding to the time required to accumulate a certain amount, and the count corresponding to the time until the next accumulation The period during which (B n) is counted is shown in Fig. 11 together with the movement of the measuring tube urine water level 37 driven by the pump.

While the two counters are counting Απ + l and Bn + 1, respectively, as parallel processing, the CPU uses An, Bn, and Cn temporarily stored in RAM to calculate the minute urine volume and total urine as described above. Calculate volume, urine conductivity, and total urine conductivity. For example, if the volume between the two level sensors is set to 1 m1 and the timebase is set to 0.01 second, the nth urine flow rate will be 6000 / Anm1Z min. Is expressed as 360000 / Anml, time (n indicates the number of times the pump is driven). Since the n-th urine i becomes Bn / An ml, total up to n-th, _e clogging velocity urine volume as the B1 / A1 + B2 / A2 + · · · + Βη / Αη will WINCH counts the An Assuming that the average flow velocity in the section continues to the section where Bn including the pump driving time is counted, approximate calculation is performed. If the n-th urine conductivity is Cn mEq / 1, the sodium equivalent is Cn / 1 000 mEq. Therefore, as the total amount excreted up to the nth, the total urine conductivity is (C1 + C2 + · · + Cn) / 1 000 mEq. Further, the total urine i and the total urine conductivity are reset when the measurement start button 69 is pressed, and then the addition calculation is newly started. The above-described operation is continuously performed every time the pump is driven. The conductivity calibration described above is performed by injecting the reference solution and then pressing the calibration button 59 in FIG. 9 to correct the conductivity table force on the program.

As shown in FIG. 9, the calculated minute urine volume, total urine volume, urine conductivity and total urine conductivity are displayed on the surface of the door 10 of the automatic urine meter as shown in FIG. Aud (LED) display 6 5 is displayed. The print data is output from the attached mini printer 98 at regular time intervals in accordance with the print format shown in FIG. Fig. 10 shows that every minute at time 51 when the print interval is set to 30 minutes, the minute urine volume 52, urine conductivity 53, total urine volume 54, and total conductivity 55 are printed. Is shown. In the figure, 56 is the date of measurement.

The automatic urine meter according to the present invention has a structure in which the unit 9 can be mounted as an option (not shown), and several automatic urine meters can be monitored by one personal computer.

The radio unit used in the present invention is for a 400 MHz band specific low power radio station, and a model HRF-600 manufactured by Hertz Electronics Co., Ltd. in Japan was used. For mini printers, Seiko Denshi Kogyo in Japan Company model MT P—201-G166 was used. Industrial applicability

'' A urine meter is useful as a device for sensing information on the homeostasis of body fluids in diseases associated with abnormal water electrolyte metabolism. As described above, the automatic urine meter according to the present invention is placed on the bedside of a patient. It is used to constantly record and monitor the patient's urine data. In addition, it is connected to a computer by wire or wireless, and is part of a patient monitoring device, which is suitable for use in managing the status of postoperative patients and infusion patients.

Claims

The scope of the claims

1. It has a detector that detects that a certain amount of urine has accumulated, and a discharge device that discharges the accumulated urine. Every time a certain amount of urine accumulates, urine is discharged, and the minute urine volume and total urine i are measured. In an automatic urine i-meter for calculating and displaying, a place where a certain amount of urine accumulates, a place where the urine is discharged, a place where air to be replaced when urine is discharged, and a urinary tract in the discharge device are sealed from the atmosphere. An automatic urine meter which can be easily attached to and detached from the detection device and the discharge device at the same time while the urine tube for input and output is connected.

2. A claim characterized in that a bypass passage (47) and a weir (33) are provided in the fluid part (1) serving as a urinary tract, and only urine that has passed through the weir is guided to the place where the predetermined amount is collected. Automatic urine meter according to Paragraph 1

3. By installing the urine electrical conductivity detection electrode in a place where a certain amount of the urine is collected, the urine conductivity and the total urine conductivity are displayed in addition to the minute urine volume and the total urine volume. The automatic urine meter according to claim 1, wherein

4. In the method of installing the conductivity detection electrode, the distance between the electrodes (b) formed by the electrodes inside the urinary tract and the distance between the electrodes formed by the electrodes on the urinary tract wall (a) are shorter than the distance between the electrodes. 2. The automatic urine meter according to claim 1, wherein: