WO1999024093A1

WO1999024093A1 - Medical apparatus

Info

Publication number: WO1999024093A1
Application number: PCT/JP1998/005056
Authority: WO
Inventors: Akio Kutuzawa; Ikuya Miyashita
Original assignee: Terumo Kabushiki Kaisha
Priority date: 1997-11-12
Filing date: 1998-11-10
Publication date: 1999-05-20
Also published as: JPH11137673A; JP3872190B2

Abstract

A medical apparatus has a shock sensor (140) built in a transfusion pump (1). The shock sensor (140) is so provided that the direction of its sensing axis is inclined with respect to all the directions along the X-Z plane parallel with a horizontal direction, the Y-Z plane parallel with a vertical direction and the Y-X direction parallel with a front-to-rear direction to secure the sensitivity for an external impact force in any direction. If an external impact force exceeding a predetermined value is detected by the shock sensor (140) and even if the power supply is off, the detection of the external impact force is stored and the history data is used as information for maintenance and inspection. Since the sensitivity for an external force exerted from any direction is provided to only one shock sensor, the reduction of the cost of the apparatus can be reduced.

Description

Specification

Technical field

The present invention relates to a medical device having a built-in shock sensor. Background art

Conventionally, among medical devices, for example, medical devices that are supposed to be frequently moved and used, such as infusion pumps, a shocking external force is applied due to inadvertently rough handling when dropped or in an emergency Sometimes. Therefore, measures have been taken to strengthen the housing.

If the device cannot be used anymore due to a fall accident, it can be dealt with by replacing it with another device.However, in many cases, there is no abnormality from the external appearance due to the strong housing. And use it as it is. In other words, if there is no problem in appearance, it is used as it is.

Therefore, by incorporating a shock sensor in the equipment, it is necessary to detect a fall accident with the shock sensor and record it. Since this shock sensor has sensitivity in only one longitudinal direction, in order to have sensitivity to external force acting in all directions, the direction along the X-Z plane along the horizontal direction of the device and the vertical direction of the device are required. Three shock sensors are provided in all directions along the Y-X plane along the Y-Z plane and along the front-back direction of the device, and amplifiers are wired to each shock sensor. There is a need to.

—However, even if each shock sensor is built into the device as described above, If the power supply is off, the shock sensor cannot function, so if it is dropped when the power supply is turned off, no history will be recorded if a shocking external force is applied. Become.

However, even if the appearance is not affected by a fall accident, and even if the power of the device is turned off, the history of the case where a shocking external force is applied by the shock sensor remains. Need to be

In order to provide sensitivity to external forces acting in all directions as described above, the direction along the X-Z plane along the horizontal direction of the device and the direction along the Y-Z plane along the vertical direction of the device However, if three shock sensors are provided in all directions along the Y-X plane along the front-rear direction of the device and an amplifier is connected to each shock sensor, there is a problem in that the circuit configuration becomes very costly.

Therefore, the present invention has been made in view of the above-described problems, and records a history of a case where a shocking external force is applied by a shock sensor even when the power of the device is off. The purpose is to provide a medical device that can be stored and used as information for maintenance inspections, and that can realize cost reduction by providing sensitivity to external forces acting in all directions with one shock sensor. And Disclosure of the invention

According to the present invention, there is provided a medical device incorporating a shock sensor in a main body, wherein the medical device has a shock sensor built in the main body, and a direction along an X-Z plane along a horizontal direction of the main body. The sensitivity axis direction of the shock sensor is inclined with respect to a direction along the Y-Z plane along the longitudinal direction of the main body and along all directions along the -X plane along the front-rear direction of the main body. And a storage means for storing the detection when the shock sensor detects a shock external force of a predetermined value or more by the shock sensor. Features.

The medical device is an infusion pump including a peristaltic pump mechanism.

When the power is on, the storage means stores a plurality of years, months, days, and times at which a shock external force equal to or greater than a predetermined value is detected. When the power is off, the shock equals or exceeds a predetermined value. It is characterized by storing multiple detections of external force and displaying it on the display unit.

It should be noted that the present invention is not limited to the above embodiments, and may be applied to medical devices such as a singe pump, a blood collection device, a dialysis device, an infusion device, a sphygmomanometer, an electrocardiograph, a pulse meter, an oximeter, and a fetal monitoring device. It goes without saying that even if there is a design change or the like within a range not departing from the gist of the present invention, it is included in the present invention. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front view of an infusion pump 1 illustrating an operation switch panel.

FIG. 2 is an external perspective view of the infusion pump 1 as viewed from behind.

FIG. 3 is a sectional view taken along line X-X of FIG.

Figure 4 is an exploded view of the infusion pump.

FIG. 5 is an exploded perspective view of the infusion pump.

Fig. 6 shows a shock sensor that detects the impact force using a built-in piezoelectric element when an impact load acts on the pump device due to a drop or the like. FIG. 2 is an external perspective view showing a mounting state of “0”.

FIG. 7 is a block diagram of an infusion pump.

FIG. 8 is a flowchart showing the procedure of use.

FIG. 9 (a) is a flowchart for explaining the operation for storing the date of occurrence of the impact force by the shock sensor 140. FIG. 9 (b) is a flowchart for explaining the operation for storing the date and time when the impact force is generated by the shock sensor 140 when the power switch is off. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the peristaltic finger system is used. The following description is based on the premise that the liquid is sent with high accuracy by eliminating the problem. Further, the present invention is not limited to this, and it is needless to say that the present invention can be appropriately applied to a conventional peristaltic finger-type infusion pump configured to perform peristaltic movement of the infusion tube by completely crushing the infusion tube.

FIG. 1 is a front view of the infusion pump 1 and shows an operation switch panel. In this figure, a state is shown in which the door base 4 (see FIG. 3) as a door means is closed after the infusion tube 2 is loaded so that the infusion can be started by operating the door lock lever 7. In addition, the so-called 7-segment numeric display section shows “8” on the display, which indicates that numerical values, errors, “1”, etc. are displayed.

By the way, in this figure, it becomes the base of the infusion pump 1 and The main body base 3 having the peripheral shape is made of aluminum die-cast to ensure the required strength and accuracy, while the left side of the main body base 3 is placed on the door base 4 centering on rotation. As shown in the figure, a key panel section 9 in which an operation switch is disposed on a door cosmetic cover 12b and a display section 8 are provided so as to be roughly classified by frame printing. The key panel portion 9 and the display portion 8 have predetermined items printed on the back surface of the transparent resin film, and a resin film processed so as to project forward in a circular shape by embossing covers each key (not shown). It is provided by bonding as described above to prevent chemicals and the like from entering the inside.

Each of the above switches is mounted on a common substrate, and the substrate on which the liquid crystal display device of the display unit 8 is mounted is provided with a backlight so that the display can be easily viewed. I have. Each switch key, display device, and lamps are connected to a control unit 200, which will be described later, via a flexible cable. Power supply, drive signals, and the like are transmitted from the cable, and a door decorative cover is transmitted. The power supply for opening and closing the door base 4 provided with the 12b is configured to be able to be performed without any trouble. In addition, the key panel section 9 and the display section 8 provided in the door base 4 handle only TTL level electric signals.

Next, the function of each switch will be described. The power switch 15 located in the lower left corner of the figure is used to turn on and off the main power supply. The power is turned on, and it is controlled so that the power is turned off by holding it down again for a predetermined time (about 2 seconds or more). Care is taken to prevent the power from being turned on and off carelessly. The battery lamp 16 on the right next to this has a green light-emitting diode for displaying in three stages as shown in the figure. Lights when AC or dedicated DC power is connected to indicate that the battery is charging, regardless of whether the battery is turned off. Is displayed at three levels.

Above the battery lamp 16, there is provided an AC / DC lamp 1 that is always lit only when the commercial power supply or the DC power supply is used and the power supply is ON.

Subsequently, a built-in buzzer sounds when pressed during the infusion, and a stop silence switch 18 for forcibly stopping the infusion is provided.

Also, to the right of the stop mute switch 18 is a start switch 19 associated with the start indicator lamp 20 by surrounding it with the same frame.By pressing the start switch 19, the built-in buzzer is activated. A beep sounds, the infusion operation starts, and the green light emitting diode of the start indicator lamp 20 flashes to indicate that it is operating.

Above each of these switches, an up-down switch 22 as a setting means is set so as to be at a position corresponding to the display digit of the expected flow rate display section 33 located below the display section 8 surrounded by the display section 8. As shown in the figure, a total of six switches are provided, and the up and down switches corresponding to each digit of the up-down switch 22 can be set in the stopped state by pressing the up and down buttons, respectively, to set the flow rate and scheduled volume. . At this time, pressing the up / down switch 22 changes the display in units of 0.1 m LZ h or 1 m LZ h, and the flow setting range is from 0.1 for the minimum to 12 OO m LZ h for the maximum. It is programmed so that it can be set to.

Also, the set volume setting range can be set in the range of 1 to 9999 mL by pressing the up and down buttons corresponding to each digit of the up-down switch 22, and can be set in 1 mL units. Or can be set to free It is programmed to store the set value.

Above the expected flow rate display section 3 3, an integrated amount remaining time display section 23 surrounded by a separate frame is provided, and the integrated amount of infusion or the remaining time until the completion of infusion is displayed. It is programmed to display in the unit of 0.1 mL or 1 mL so that the range is from 0.0 to 9999 mL. Although the estimated flow rate display section 3 3 is an LED display, the accumulated amount remaining time display section 23 is composed of a liquid crystal display device as described above and cannot emit light. A backlight 58, which is a lighting means, is provided in the background because it cannot be seen without lighting.

In addition, above the accumulated amount remaining time display section 23, an alarm display section provided with various alarm characters is arranged so as to be surrounded by a separate frame printing. This alarm display section blinks the word "Complete" The number of drops set when connecting a drip probe (not shown) to the complete display section 24, which is displayed as, or one of the numbers "1 5" or "60". Part 25, a flow abnormality display part 37 in which the character of `` flow abnormality '' blinks when the flow is abnormal when the drip probe is used, and a normal infusion when a blockage abnormality of the infusion tube 2 is detected When the door cannot be closed, the `` closed '' character flashes to prompt the user to take action.When the door base 4 is not completely closed with respect to the main body base 3, the door switch 4 indicates the status. When detected, the word "door" Bubble error display that flashes when a bubble of a predetermined length (5 mm) or more is mixed into the infusion tube 2 Part 28 and a battery flashing "battery" when the internal battery voltage drops The abnormal display section 29 is provided so as to be surrounded by the same print frame as shown in the figure.

On the left side of the alarm display section, a light emitting diode that displays green in three levels: the high level of H, the middle level of M, and the low level of S An obstruction pressure setting display section 30 arranged in the vertical direction as shown in FIG. 1 is provided, and a preset occlusion detection alarm pressure level is always lit and displayed. These light emitting diodes are mounted on the same mounting board, and are supplied with power via the above-mentioned flexible cable.

The flow rate lamp 31 and the planned quantity lamp 32 provided above the above-mentioned planned flow rate display section 33 light up at the time of setting.

Further, a scheduled flow rate switch 34, which is a flow rate setting means provided below the expected flow rate display section 33, is pressed when switching between the flow rate setting mode and the scheduled volume setting mode. The accumulated time switch 35 below the expected flow rate switch 34 is switched every time the switch is pressed and released, and the accumulated time and the remaining time are switched and displayed on the accumulated time display section 23. If you hold down the key for more than the specified time (about 2 seconds), the buzzer sounds, the integrated amount is cleared to “0”, and the remaining time returns to the initial value. A fast-forward switch 36 is provided below the accumulated remaining time switch 35, and the beeper sounds intermittently while the switch is pressed in a stopped state. Infusion with.

The door base 4 is made of aluminum die-cast similarly to the main body base 3, and has a curved surface, which is a design point, between the side and the front, and a convex operation indicator 6 on the upper surface. It is provided to protect Green inside of this operation indicator 6 A built-in light emitting diode that emits red light and lights according to the operating state. That is, it flashes green during liquid feeding and fast-forwarding. In addition, it flashes red when an alarm is issued, and alternately flashes green and red when the standby function described below is activated, so that a nurse or the like is notified that infusion can be started immediately.

Next, FIG. 2 is an external perspective view of the infusion pump 1 as viewed from behind. On the back side of the infusion pump 1, the body cover 1 2a has an opening 12a-1 on the back side as shown in the figure, and is mounted on the back substrate 13 shown by the broken line in the figure. External communication connector 48, fuse holder 39, AC power supply connector (receptacle) 49, history switch 50 mounted on main mounting board 14, DC connector 51, nurse call connector 52, and drip The probe connector 53, the infusion set switch 54, and the display brightness switch 55 are configured so as to go outside through this opening. Further, as shown in the figure, a drip-proof cap 56 made of an elastomer is further provided to cover a connector that is not used, thereby preventing a chemical solution or the like from entering the inside of the apparatus.

The history switch 50 is pressed when switching between the normal mode and the history mode.

Fig. 3 is a sectional view of the infusion pump, and Fig. 4 is an exploded view of the infusion pump.

In FIGS. 3 to 5, the main body base 3 integrally has a vertically formed groove 3 m at a substantially central portion as shown in the figure, and the infusion tube 2 is set in the groove 3 m. I am trying to do it. The pump mechanism 100 is designed to be detachable by removing a total of six screws 110 with a Phillips screwdriver approximately in the middle of the groove 3 m. The pump mechanism 100 is taken out of the main body base 3 and washed with a predetermined detergent to wash out the chemical solution, so that the movement can be returned to normal. For this reason, each finger 1O-n provided in the pump mechanism 100 is injection-molded from a polyacetal resin material having excellent chemical resistance and chemical resistance, for example.

Next, the arrangement of each mechanism and the substrate in FIG. 3, which is a cross-sectional view taken along line XX of FIG. 1, will be described with reference to FIG. First, the main body base 3 is made of aluminum die-cast as described above, and the shape part 3 t for detachably accommodating the pump mechanism 100 shown by broken lines in the figure is attached to the above-mentioned jaw part 3 a. And are integrally formed. The jaw 3a is formed to be the same as or slightly higher than the door base 4 to protect the door base. The main body base 3 is a mounting base of each member, and the upper frame portion of the apparatus is formed by fixing an upper plate 111, which is an aluminum die-cast upper plate member, as shown in the figure. ing. In addition, a rear plate 1 1 2, which is a rear member processed from an iron plate having a thickness of about 1 to 2 mm, has a screw hole in the upper plate 1 1 1 on a rear portion of the upper plate 1 1 1. The provided mounting portion 111d is fixed with two screws 110 and forms a rear frame portion on the rear side of the device. In addition, a lower plate 1 13 as a lower plate member is fixed between the lower portion of the main body base 3 and the rear plate 1 1 2 with screws 110 to form a bottom frame portion of the device. . In this way, the main body base 3, the upper plate 111, the rear plate 112, and the lower plate 113 form a strong and closed main body frame.

As described above, the upper and lower and back plates and the protection plate 118 described later are configured so as to surround the built-in mechanism and the substrate with reference to the main body base 3 having sufficient strength. Ensure sufficient rigidity As a result, the mechanism, circuit board, and other parts can be protected in the event of a fall, while minimizing the effects of electromagnetic waves.

Also, an eccentric cam-shaped portion corresponding to the above-mentioned finger 1O-n is integrally formed on the outer peripheral surface of the camshaft 102, and by ensuring the accuracy, an infusion tube with high dimensional accuracy can be used. For example, the flow rate accuracy is guaranteed within ± 5%. This integral camshaft 102 is formed of stainless steel such as SUS304.

Regarding the configuration of the door base 4 side, the same reference numerals are given to the components already described, and the description thereof will be omitted. However, the backlight 58 (see FIG. 3) will not be described. 8 and the lower side of the door base 4 is protected by a jaw 3a. After the pump mechanism 100 is fixed to the shape portion 3 t with six screws 110, the small radial bearings 120 of the fingers described later are camshafts 102 of the camshafts 102. It is configured to be in contact with the surface 102a. The upper plate 111 is shaped to escape the toothed pulley 104, as shown in the figure, so that the upper plate 111 can be fixed while the shaft is fixed. In this case, the camshaft 102 can be fixed even after it is assembled, so that an order mismatch does not occur. The battery unit 1 16 has the shape shown in the figure and is fixed to the lower plate 113. On the other hand, the flexible cable 63 extends from a main mounting board 14, which will be described later, and is configured such that a contact portion appears as shown in the figure through an opening of the main body base 3.

As described above, it is assembled using the screws 110 and assembled as shown in the external perspective view shown in FIG. The main mounting board 14 which stores a program to be described later and performs predetermined control is provided with a plurality of connectors arranged upward as shown in the figure. In addition, by setting a wide grounding pattern and by considering the mounting pattern of each electronic component, it is designed to be strong against external noise, and is used in operating rooms where many devices that generate noise are used. Use is possible.

FIG. 6 is an external perspective view showing a mounted state of a shock sensor 140 that detects an impact force by a built-in piezoelectric element when an impact load acts on the pump device due to a drop or the like. This shows that the weight detection in all XYZ directions can be performed by mounting the shock sensor 140 on the main mounting board 14 as shown in the figure.

That is, when the shock sensor 140 has sensitivity in the longitudinal direction, a piezoelectric sensor that captures pressure as a change in an electric signal is applied to the X-axis along the left and right lateral directions of the pump device 1 and the front-back direction. By mounting and fixing the shock sensor 140 at an angle of 、 1, に対して 2 with respect to the Z direction and the Y direction along the vertical direction as shown in the figure, one shock sensor 140 The load applied in the vertical and horizontal directions can be detected.

In this way, when the weight in all directions is detected by one shock sensor 140, the sensitivity in each direction is reduced by the tilt angle, but only one amplifier circuit etc. connected to the shock sensor 140 is required. It can contribute to cost reduction.

If the inclination angles Θ 1 and Θ 2 of the shock sensor 140 are set to be a predetermined angle (for example, 45 degrees), weights in all directions can be detected, and cost reduction can be achieved. The shock sensor 140 recognizes a shock when a shock detection signal is input, the detection method is recognized as a port input (shock sensor signal), and a shock warning is output from the control unit 200. Save (store) in history in the storage unit. The power to release the shock detection latch at the time of saving to the history and to display the shock sensor warning display in the history mode.For details, see the history function and the power to be described later. The mode switches to the reset mode, and the operation history and shock history are displayed together with the date and time.

Next, FIG. 7 is a block diagram of an infusion pump. In this figure, the main mounting board 14 is provided with a main central control unit 201a and a sub-central control unit 201b composed of a dedicated LSI to be the central processing unit 201. By connecting each circuit configuration as shown to the central control unit 201, the entire control unit (control means) 200 is configured.

From the upper left of FIG. 7, a clock unit 203 that receives power for backup from a lithium battery 204 independent of the power supply of the pump device is connected to the central control unit 201, Timing is performed even when power is not supplied from either the power supply or the built-in battery. Further, as described above, the history switch 50 and the display brightness switch 55 provided on the back surface are directly connected to the main central control unit 201a.

The SRAM storage unit 205 directly connected to the main central control unit 201 a has a storage unit 206 for storing the set infusion volume and the planned volume, and a usage history unit 200 for storing the usage history. 7 and a shock history that stores the date and time of occurrence of the shock by the shock sensor 140 described above. A storage unit 209 for storing a blockage when a blockage state occurs, and another storage unit 210 for storing a gamma amount and time, so that storage can be performed. I have to.

The external communication unit 211 consisting of the external communication terminal and the external communication circuit indicated by the dashed line is directly connected to the main central control unit 201a, allowing data collection using a personal computer. I have to.

The EEPROM 213 stores the set values required for the operation of the infusion pump, and the sub central control unit is the same as the dip switch 214, in which the switches can be set by switching as described later. Connected to 201b. The nurse call connector 52 is connected to the nurse call circuit 215 so as to call the nurse in response to various alarms generated in the control unit 201.

The shock circuit 2 25 is connected to the shock sensor 140, and is generated by the shock sensor 140 for the control unit 201 when an impact force is applied due to the drop or rough handling of the infusion pump 1. By sending an impact generation signal of an impact due to a fall, etc., the date of occurrence of the impact force is stored.

Next, a display control circuit 230 for displaying on the display unit 8 an infusion operation such as an infusion volume, an estimated infusion volume, and an infusion accumulated value is connected to the central control unit 201, which will be described later. The display is performed based on the generated code. The above-mentioned rotation detection sensor 108 is connected to a motor rotation detection circuit 231, which is connected to the central control unit 2◦1, and outputs an output according to the rotation speed and rotation speed of the stepping motor 106. It is sent to the control unit 201. A motor drive circuit 232 is connected between the stepping motor 106 and the central control unit 201 to drive the pump mechanism 100. Next, FIG. 8 is a flowchart showing a use procedure. In this figure, the case where the above-described infusion pump 1 is used for normal infusion will be described with reference to FIG.

After confirming the medical record or health condition of the patient to be infused, in step S1, an infusion bag containing a predetermined drug described later is hung from the stand, and the infusion tube 2 is connected to the infusion bag. To detect abnormal flow or free flow, connect an infusion probe (not shown) to the infusion probe connector 53, then switch the infusion set switch 54 according to the number of drops in the infusion tube 2, and Attach the probe to a drip tube (not shown). Next, in step S2, while the door base 4 is kept open, the power switch 15 is pressed so as to be turned on for a predetermined time (about one second). Subsequently, in step S3, all indications flash three times. At the same time, check that the buzzer sounds and fingers 1 10-n move slightly. If these are not executed, it is judged as a failure and no further operation is performed. After step S3, in step S4, the display characters of air bubbles, obstruction, doors, and blink on and off.

In steps S 1 to S 4 described above, the so-called initialization of the central control unit is performed.

In step S5, the AC / DC lamp 17 is turned on. When using a probe, set the n

An indication of either a “5” or “60” indicates that the IV probe has been successfully connected.

In the next step S6, the release lever 46 is pushed to release the tube clamp section 4f, then the infusion tube 2 is trimmed, and the infusion tube 2 is in the middle of the infusion tube / Tube holder 5 Door lock cover 7 provided with a door lock lever 7 which has been fixed to a and immediately set so that it does not bend into the groove 3 m of the body base 3, and has been moved to the unlocked state in advance 1 2 Rotate the door base 4 with b fixed to the body base 3 side, and move the lever 7 downward to fix the door to the base side. Now that the infusion tube 2 has been set, continue to hold down the planned flow rate switch 3 3 to set the occlusion pressure to one of three levels, and at the same time, the lower right side of the up-down switch 2 2 When the key is pressed, “Pr ES” is displayed on the expected flow rate display section 3 3 and the blockage pressure setting mode is set. While holding down the expected flow rate switch 3 3, simultaneously press the up / down switch 2 Each time the lower center key of 2 is pressed, the pressure level switches in three steps. Set the desired occlusion pressure by lighting the desired occlusion pressure.

Next, proceeding to step S7, the flow is set by pressing the upper or lower switch of the up / down switch 22 corresponding to each display digit of the expected flow rate display section 33, thereby setting the expected flow rate switch. 3 Press 4 to complete the setting of ^ / melon. At the same time, switch to the set amount setting mode.

Following this step S step, in step S 8 the expected flow rate display

Press the upper or lower key of the up-down switch 22 corresponding to each display digit of 3 to set the expected amount. After the above settings, the clamp is opened in step S9, and the vein needle is punctured into the vein of the patient in step S10.

Thereafter, infusion is started by pressing the start switch 19 in step S11, and the operation indicator 6 flashes green in step S12. Then, in the following step S13, when the infusion of the predetermined volume is completed, the word "Complete" flashes. Subsequently, in step S14, the buzzer is turned on to notify the end of infusion. At this time, keep-in open function is activated and infusion is continued at 1 mL per hour. However, if the flow rate is lower than this, the infusion is continued at the set flow rate.

Then, by pressing the stop / mute switch 18 in step S15, the alarm is turned off in step S16. At this time, the keep-open function continues. Next, when the stop mute switch 18 is pressed again in step S17, the operation indicator 6 turns off, the stop display lamp 21 flashes orange, and at the same time, the stop state is released with the keep-bane open function released. (Step S18). The above is the procedure of the basic operation, and the functions described later are activated by the start switch 19 of step S11 being triggered.

During the operation of the infusion pump, the analog-to-digital conversion data sent from the upstream occlusion sensor 61 at a predetermined cycle (for example, 1 OO ms) is detected a predetermined number of times (for example, three times) to obtain a moving average. When the moving average is determined to be larger than the set blockage value, the blockage detection circuit 235 determines the presence of blockage only when it is determined that the moving average is larger than the set blockage value.

Here, the moving average means that the transmitted three data are successively updated at a period of 1 OOms to obtain an average. When it is determined that the motor is blocked, the motor forced stop flag is set and the stepping motor 106 is forcibly stopped. Before or after this, the “blocked” character of the blockage abnormal display section 26 is blinked to indicate that the blockage has occurred, and the processing ends.

Also, it is determined that the moving average is smaller than the blockage setting value. On the other hand, if the analog / digital conversion data sent from the upstream occlusion sensor 61 is lower than the set occlusion pressure, the first data sent from the downstream occlusion sensor 62 after being converted from analog to digital is next to the above data. When it is determined that the pressure is higher than the set pressure compared to the set pressure, the downstream occlusion sensor 61 is turned on, and it is determined that the occlusion is in effect. Similarly, when it is determined that the moving average is larger than the blockage set value, it is determined that blockage is present only when it is determined.

If it is determined that the moving average is smaller than the blockage setting value, it is determined that the blockage is sudden.

In this way, by monitoring the blockage of the infusion tube 2 on the upstream side and the downstream side with the pump mechanism 100 interposed therebetween, it becomes possible to perform safer liquid feeding. It is also possible to cope with the case where it is necessary to constantly monitor the blockage of the infusion tube 2 on the upstream side and the downstream side with 0 in between.

Next, FIG. 9 (a) is a flow chart for explaining the operation for storing the date and time of occurrence of the impact force by the shock sensor 140 connected to the above-mentioned shock circuit 2 25. FIG. This program starts when infusion pump 1 is started in step SI 1 of FIG. FIG. 9 (b) is a flowchart for explaining the operation for storing the generation of the impact force by the shock sensor 140 when the power switch is in the off state.

First, in FIG. 9 (a), the current date in step S42 is updated by receiving a signal from the power on in step S41. This step S42 is repeatedly executed and temporarily stored, and the process returns to step S42 to wait for the execution of step S43 to update the current date. In this way, while waiting while updating, the infusion pump 1 is dropped in step S43 by the shock sensor 140 fixed so as to have sensitivity with one sensor in the X 丫 Z direction as described above. Or more than the specified impact force due to improper handling (G) Then, when a shock detection signal is generated and recognized as a shock sensor signal, in step S44, the date and time of the shock occurrence are stored and stored in the history.

Thereafter, when the history switch 50 is pressed in step S45, the mode is switched to the history mode, and the date, time, and date of the shock occurrence in the shock history are displayed on the display unit 8 together with the operation history.

On the other hand, in FIG. 9 (b), when the power switch is off, an impact detection signal is generated in step S47 due to the drop or improper handling of the infusion pump 1, and is recognized as a shock sensor signal. Then, only the fact that an impact force has been generated is stored, and the process proceeds to step S49 and ends. When the power switch is turned on, the impact generation is stored in the same manner as in FIG. 9 (a). .

As described above, by constantly monitoring and storing the impact force generation not only when the power is turned on, but also when the power is turned off, if a malfunction occurs in the operation of the infusion pump 1, it will help to identify the cause. can do. The shock sensor 140 is set to detect a drop with a height difference equal to or more than a set height difference or the occurrence of a shock due to an external force equal to or more than a predetermined value.

In the present invention, a peristaltic finger type infusion pump has been described. Even if there is a design change or the like within a range not departing from the gist of the present invention, it is included in the present invention. Industrial applicability

As described above, according to the present invention, when a device is accidentally dropped, Even when the power of the device is off, the shock sensor built in stores the fact that an external force has been applied to the device, and can be used as information for maintenance and inspection. Further, it is possible to provide a medical device capable of realizing cost reduction by providing a single shock sensor with sensitivity to an external force acting in all directions.

Claims

The scope of the claims

1. A medical device with a built-in shock sensor,

For all directions along the X-Z plane along the horizontal direction of the main body, along the Y-z plane along the vertical direction of the main body, and along the Y-X plane along the front-rear direction of the main body. By arranging the shock sensor so that the sensitivity axis direction is inclined, the sensitivity of shock external force in all directions is secured,

A medical device comprising: a storage unit for storing the detection when a shock external force equal to or more than a predetermined value is detected by the shock sensor.

2. The medical device according to claim 1, wherein the medical device is an infusion pump provided with a peristaltic pump mechanism.

3. The storage means stores, when the power supply is on, a plurality of years, months, days and times when a shocking external force of a predetermined value or more is detected, and stores a predetermined value when the power supply is off. 3. The medical device according to claim 1, wherein the detection of the impact external force is stored for a plurality of times, and is displayed on a display unit.