JPH11137676A - Transfusion pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfusion pump capable of more safely and surely express the generation of an abnormal state by both of an alarming sound and alarming display by making the display part of the liquid transfusion pump and automatically making the display part into normal brightness when an abnormal state is generated at the time of transfusing liquid by setting a sleeping mode. SOLUTION: This transfusion pump for continuously transfusing liquid through a long period is provided with an abnormality detecting part detecting an abnormal state at the time of continuously transfusing liquid, an operation indicator 6 giving information on the abnormal state by an alarming sound or alarming display, a setting part with a display part for several settings for continuous transfusion, a back light for illuminating the display part, a sleeping mode setting part making the back light dark, and a control means. When the abnormal state is detected after starting continuous transfusion, the back light 58 is made bright.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion pump for performing continuous infusion for a long time.

[0002]

2. Description of the Related Art Infusion pumps that perform continuous infusion for a long time include a peristaltic infusion pump that sequentially injects infusion tubes with fingers to perform infusion and a disk with rotating rollers to press the infusion tube. There are a roller type infusion pump for performing infusion and a syringe type infusion pump for performing infusion by pressing a piston of a syringe. When these infusion pumps are used to perform continuous infusion for a long time regardless of day and night, it is necessary to prompt an action by detecting an abnormal state during continuous infusion.

Therefore, conventionally, when an abnormal state during continuous infusion is detected, an alarm is displayed by an operation indicator, and an alarm sound is generated by a buzzer to urge the user to take measures to eliminate the abnormal state. ing.

Further, a display unit for performing various settings such as a flow rate and a scheduled volume for continuous infusion is provided with a backlight for performing illumination from the back side, for example, at night.
Infusions can be set at night without turning on the interior lights.

[0005]

In the infusion pump configured as described above, if the infusion is performed while the backlight of the display unit is lit at night, the patient may not be able to sleep after the light is turned off. . Therefore, it is conceivable to enable a so-called sleep mode setting so as not to turn on the backlight in the continuous infusion state or to reduce the amount of light.

However, if the backlight is not turned on in such a continuous infusion state, or if the amount of light is reduced, when an infusion abnormal state occurs suddenly, the notification of the occurrence of the abnormal state cannot be understood. The indication of the expected amount and flow rate from the start of the infusion becomes invisible.

[0007] Therefore, the present invention has been made in view of the above-mentioned problems, and it is possible to darken the display portion of an infusion pump during infusion in which a sleep mode is set. When an abnormal condition such as a voltage drop occurs, the display automatically switches to normal brightness.
An object of the present invention is to provide an infusion pump capable of clearly notifying an abnormal state by both an alarm sound and a display.

Specifically, the present invention provides an infusion pump in which the display is darkened by selecting and inputting a sleep mode, and the display is automatically turned to a normal brightness when an alarm such as bubble detection or tube blockage is detected. The purpose is.

[0009]

Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object, according to the present invention, in an infusion pump that performs continuous infusion for a long time, an abnormality detection unit that detects an abnormal state during the continuous infusion, and the abnormality detection unit is connected to the abnormality detection unit. Display means for notifying an abnormal state due to an alarm sound and / or an alarm display, setting means having a display part for performing various settings for the continuous infusion, and illumination for illuminating the display part Means, sleep mode setting means for making the brightness of the lighting means darker than usual, control means connected to the abnormality detecting means, the display means, the setting means, the lighting means, and the sleep mode setting means, Comprising, after the start of the continuous infusion, when the abnormal state is detected,
It is characterized in that the brightness of the illumination means is increased.

The infusion pump is of a peristaltic type that performs infusion by pressing an infusion tube from an outer peripheral surface, and the abnormality detecting means includes a bubble detection unit that detects bubbles mixed into the infusion tube. And a blockage detecting unit for detecting a blockage abnormality of the infusion tube.

[0011]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the following description, a peristaltic finger method proposed by the applicant of the present invention in Japanese Patent Application Laid-Open No. 09-151856 is used. The following description is based on the premise of a method of accurately sending a liquid by eliminating the influence of the thickness of the infusion tube. 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. This figure shows a state in which the infusion tube 2 is loaded, the door base 4 as the door means is closed, and the infusion can be started by operating the door lock lever 7, and the display unit is a so-called 7-segment numeral. The display section shows "8", which indicates that numerical values, errors, "-" and the like are displayed.

In this figure, a main body base 3 which is a base of the infusion pump 1 and has a main body outer peripheral edge shape portion is made of aluminum die-cast to secure necessary strength and accuracy, while the main body base 3 is provided. A key panel unit 9 in which operation switches are disposed on a door decorative cover 12b as shown in FIG.
Are provided so as to be roughly classified by frame printing. The key panel section 9 and the display section 8 have predetermined items printed on the back surface of the transparent resin film, and the resin film processed so as to project forward in a circular shape by embossing covers each key (not shown). It is provided by bonding to prevent a chemical solution or the like from entering the inside.

Each of the above switch keys is mounted on a common substrate, and a backlight is provided on the substrate on which the liquid crystal display device of the display unit 8 is mounted.
The display is easy to see. Each switch key, the display device, and the lamps are connected to a control unit 200 described below via a flexible cable, and power supply, a drive signal, and the like are transmitted from the cable,
The power supply for opening and closing the door base 4 provided with the door decorative cover 12b can be performed without any trouble. The key panel section 9 and the display section 8 provided on the door base 4 handle only TTL level electric signals.

Next, the function of each switch will be described. The power switch 15 disposed at the lower left corner of the figure is used to turn on / off the main power and is pressed for a predetermined second (about 1 second or more). By continuing, the power is turned on, and the power is turned off by pressing it again for a predetermined time (about 2 seconds or more), so that careless turning on and off of the power is considered. The battery lamp 16 on the right side is provided with a green light emitting diode for displaying in three stages as shown in the figure, and is turned on when an AC or dedicated DC power supply is connected regardless of whether the power is on or off.
The fact that charging is in progress is indicated, and the amount of charge is displayed during charging and the remaining amount is displayed at three levels when the built-in battery is used.

Above the battery lamp 16, there is provided an AC / DC lamp 17 which 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 mute switch 18 for forcibly stopping the infusion is provided on this. When the stop / mute switch 18 is pressed while the alarm sound is sounding, the mute switch 18 can be muted. When the infusion preparation is ready and the infusion can be started, the stop / mute switch 18 is pressed for a predetermined time (about 2 seconds or more). '', So that the alarm state for not forgetting to start is released, so that, for example, when waiting in the operating room in a state where the needle is completed for the patient, an alarm is not generated during the time until the start of infusion. To be able to. On the left side of the stop / mute switch 18, there is provided a stop display lamp 21 in which a diode that emits an orange light blinks during a stop so as to be surrounded by the same frame as the stop / mute switch 18.

A start switch 19 associated with the start display lamp 20 by being surrounded by the same frame is provided on the right side of the stop / mute switch 18. When the start switch 19 is pressed, a built-in buzzer sounds, The infusion operation is started, and the green light emitting diode of the start display lamp 20 blinks 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 and surrounded by the display section 8. As described above, a total of six switches are provided. By pressing the up and down buttons corresponding to each digit of the up-down switch 22 in a stopped state, the flow rate and the set amount can be set. At this time, by pressing the up / down switch 22, 0.1 mL / h or 1
The display changes in units of mL / h, and is programmed so that the flow rate setting range can be set from the minimum of 0.1 to the maximum of 1200 mL / h.

Further, the set amount 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 1 m
It is programmed so that it can be set in units of L or set free, and is configured to store the set value.

Above the expected flow rate display section 33, an integrated time remaining time display section 23 surrounded by separate frame printing is provided, and the integrated amount of infusion or the remaining time until completion of the infusion is indicated by the integrated amount. It is programmed to display in units of 0.1 mL or 1 mL so that the display range is in the range of 0.0 to 9999 mL. These flow rate planned amount display sections 33
Is an LED display, but since the accumulated amount remaining time display section 23 is composed of a liquid crystal display device as described above, it cannot emit light by itself, and therefore cannot be viewed without illumination in night or dark rooms, and is an illuminating means. A backlight 58 is provided behind.

Above the accumulated amount remaining time display section 23, an alarm display section provided with various alarm characters is provided so as to be surrounded by separate frame printing. The alarm display section is a completion display section 24 for displaying the word “Complete” by flashing.
And a drop number display unit 25 for displaying one of the numbers "15" and "60", which is the number of drops set when the drop probe 302 shown in FIG. 27 is connected, and a drop probe. The flow abnormality display section 37 in which the character "flow abnormality" blinks when the flow is abnormal, and the character "block" blinks when the infusion of the infusion tube 2 is detected and a normal infusion cannot be performed. And the door base 4 is connected to the main body base 3.
When the door switch is not completely closed and the state is detected by the door switch, the door opening display section 27 that blinks the word “door” and a predetermined length (5
mm) when a bubble having a length greater than or equal to mm is mixed in, the bubble character display section 28 blinks the print character of “bubble”.
And a battery abnormality display section 29 which blinks "battery" when the voltage of the built-in battery decreases.
Are 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, the alarm pressure level for detecting the blockage of the infusion tube 2 is set to a high level of "H".
An occlusion pressure setting display unit 30 is provided in which light-emitting diodes for displaying green in three stages of “M” and “L” are arranged vertically as shown in the figure, and a preset occlusion detection alarm is provided. The pressure level is always lit. 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 are turned on at the time of setting.

An expected flow rate switch 34, which is a flow rate setting means provided below the expected flow rate display section 33,
Pressed when switching between flow rate setting mode and scheduled volume setting mode. Each time the accumulated remaining time switch 35 below the expected flow rate switch 34 is pressed and released, the accumulated amount and the remaining time are switched and displayed on the accumulated amount remaining time display section 23. When the button is pressed for more than a predetermined second (about 2 seconds), a 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. While the switch is pressed in a stopped state, a buzzer sounds intermittently and infusion is performed at a flow rate of 500 mL / h or more.

The door base 4 is made of aluminum die-cast similarly to the main body base 3, has a curved surface which is a design point between the side surface and the front surface, and has a convex operation indicator 6 on the upper surface. It is provided to protect. A light-emitting diode that emits green and red light is built in the operation indicator 6, and lights up according to the operation 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 a standby function described later is operating, so that a nurse or the like is notified that the infusion can be started immediately.

FIG. 2 is an external perspective view of the infusion pump 1 as viewed from behind. In the figure, the infusion pump 1 is provided with a main body decorative cover 12a which is specially injection-molded from a predetermined resin material so as not to have sink marks or resin flow marks so as to cover the four corners of the main body base 3 (FIG. 3). The main body decorative cover 12a is detached so that the interior can be accessed to facilitate maintenance and assembly. A rear end side of the handle 5 for gripping the main body decorative cover 12a during carrying is fixed with one screw 110 as shown in the figure.

On the back side of the infusion pump 1, the main body decorative cover 12a has an opening 12a-1 on the back side as shown in the figure, and the back side substrate 13 shown by a broken line in the figure.
The external communication connection connector 48, the fuse holder 39, the AC power supply connector (receptacle) 49, and the history switch 5 mounted on the main mounting board 14 mounted thereon.
0, DC connector 51, nurse call connector 52, drip probe connection connector 53, and infusion set switch 54
And the display brightness switch 55 are configured to go outside through this opening. In addition, an elastomer drip-proof cap 56 is further provided as shown,
Each unused connector is covered with a cover to prevent a chemical solution or the like from entering the inside of the device.

A predetermined cable is connected to the external communication connector 48 when the external communication function is used, so that a flow setting, an alarm, an operation state, and the like can be transmitted and received between the infusion pump 1 and an external computer. Display brightness switch 5
Reference numeral 5 is pressed when the brightness of the backlight of the display unit 8 and the operation indicator 6 and the like is changed continuously or stepwise. The history switch 50 is pressed when switching between the normal mode and the history mode alternately. The infusion set switch 54 is operated in a state where the infusion probe is connected to the infusion probe connection connector 53 therebelow, so that the infusion set switch 15 or 15 or 60 drops / mL.
Is switched and displayed on the drop number display section 25 of the infusion set on the display section 8.

The nurse call connector 52 is for connecting a predetermined cable to a nurse center. When an alarm is generated for some reason, the relay contact of the nurse call terminal is turned on to call a nurse. Nurse call function that can be done.

Next, FIG. 3 is a front view showing a state where the door base 4 is opened, and shows a state before the infusion tube 2 is loaded. FIG. 4 is a sectional view of the infusion pump, and FIG. 5 is a three-dimensional exploded view of the infusion pump.

In FIGS. 3 to 5, the main body base 3 is integrally formed with a groove 3m formed in the vertical direction at a substantially central portion as shown in the figure, and the infusion tube 2 is set in the groove 3m. ing. In addition, this groove 3m
A pump mechanism 100 which is configured to be detachable by removing a total of six screws 110 with a Phillips screwdriver is provided at a substantially middle portion of the finger 10-. When the movement of n becomes worse, 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 purpose, each finger 10-n provided in the pump mechanism 100 has:
It is injection molded from, for example, a polyacetal resin material having excellent chemical resistance and chemical properties.

A pair of jaws 3a projecting forward in the drawing are integrally formed below the main body base 3 so as to sandwich the groove 3m, and when the door base 4 provided with the door decorative cover 12b is closed. Jaws 3a which are these convex portions
By positioning the lower side surface of the door decorative cover 12b above the door decorative cover 12b, when any shocking external force is applied, the door decorative cover 12b and the door base 4 are received by these jaws 3a. Care is taken not to apply external force. Similarly, on both side surfaces of the main body base 3, a convex portion 3 f projecting left and right is integrally formed, and the convex portion 3 f is about 10% wider than the door base 4 in width. When the base 4 is closed, the left and right side surfaces of the door decorative cover 12b are positioned inside the convex portions 3f, so that when any shocking external force is applied from the left or right, the convex portions 3f receive the external force. The door decorative cover 12b and the door base 4 are protected by being fastened. The left and right convex portions 3f are painted in the same relatively conspicuous color as the main body base 3, and together with the main body decorative cover 12a having a side surface continuous with these convex portions 3f, an important shape portion in appearance is defined. Has formed.

Under the groove 3m, when the door base 4 is opened, the infusion tube 2 is automatically closed and closed.
A tube clamp 47 is provided, which can be arbitrarily released from closing by operating the release lever 46 on the right side. In addition, the release lever 46 that is operated so as to be pressed releases the clamp of the infusion tube 2 by the clamp portion 47 by pressing. Accordingly, the clamp by the tube clamp unit 47 is released, and the tube is used when mounting and removing the infusion set. The hook 59 fixed to the main body base 3 is
It is provided to lock the locking portion 7a of the lever 7 of the door base 4.

A door seal rubber 6 made of an elastomer is provided on the door base 4 side facing the most upstream side of the groove 3m.
6 is provided, and when the door base 4 is closed, the junction seal surface is deformed by the door seal rubber 66 to prevent the chemical solution from entering inside. Further, the main body base 3 is formed so that the illustrated shape portion 3j and the shape portion 4j of the door base 4 are infiltrated with each other, so that the chemical solution is prevented from entering the inside also at this portion. I have.

A bubble sensor 60 is provided below the shape portion 3j. This bubble sensor 60 is used for the infusion tube 2
A predetermined amount (approximately 0.04 mm) of the air bubbles mixed into the tube so that the length in the tube becomes a predetermined length (for example, approximately 5 mm).
cc) is for forcibly stopping the subsequent operation when the above-mentioned one is detected, and a tube is provided on the side of the door base 4 which faces the bubble sensor 60 which is the bubble detecting portion. A holding plate 67 is provided, and when the door base 4 is closed, the infusion tube 2 is immobilized so that accurate air bubble detection can be performed.

An upstream closing sensor 61 is provided below and downstream of the bubble sensor 60, and an upstream closing pressing plate 68 provided on the door base 4 so as to face the upstream closing sensor 61.
At the same time, the infusion tube 2 is sandwiched in the front-rear direction of the drawing. The upstream blockage sensor 61 includes a permanent magnet and a pickup that detects the moving position of the permanent magnet in an analog manner. The upstream blockage sensor 61 determines the position of the permanent magnet that is moved in accordance with the internal pressure change due to the closed state of the infusion tube 2. From the detection, it is necessary that the upstream closing presser plate 68 does not restrict the internal pressure change in all directions of the infusion tube 2. Therefore, the disc shown in the drawing can be freely moved at the end of the spring plate (elastic member). Is held.

A downstream blockage sensor 62 is provided below the pump mechanism 100. The downstream blockage pressing plate 69 provided on the door base 4 is opposed to the downstream blockage sensor 62. It is pinched in the direction. This downstream blockage sensor 62 is the same as the upstream blockage sensor 61 described above. Further, the downstream closing presser plate 69 is the same as the upstream closing presser plate 68 and is used as a common component.

The principle of operation of the pump mechanism 100 is that the infusion tube 2 attached is pressed by the finger 10-n to continuously infuse at a set flow rate per unit time. A motor rotation signal is generated based on the information stored in the controller, and the motor is rotated by the rotation signal to drive the pump and adjust the flow rate of the infusion.

The fingers 10-n are connected to the first finger 10-1, the second finger 10-2a, the second finger 10-2a from the upstream side.
b, the third fingers 10-3a, 3b, the fourth fingers 10-4, and the fifth fingers 10-5 are built in the pump base 101 so as to be reciprocated in the front-rear direction in the drawing as shown in the drawing. . As shown, the shape of the first finger 10-1 and the fourth finger 10-4 is different from that of the second finger 10-1.
Finger 10-2a, 2b, third finger 10-3
a, 3b, unlike the fifth finger 10-5, the width dimension W1 of the first finger 10-1 and the fourth finger 10-4
Is set larger than the width W2 of the other fingers. Also, the first finger 10-1 and the fourth finger 1
A convex portion is formed on the pressing surface 0-4.

As described above, by not forming the same shape in all cases, as described above, the applicant of the present invention disclosed in JP-A-09-1518.
The peristaltic finger method proposed in Japanese Patent Publication No. 56 is made ideal.

That is, the first finger 10-1 and the fourth finger 10-1
The infusion tube 2 is completely closed only on the upstream side and the downstream side by the convex portion formed on the pressing surface of the finger 10-4, and the other fingers are the second fingers 10-2a, 2b, and the third fingers 10-3a, 3b. By not completely crushing the middle part of the infusion tube, high-precision liquid feeding without the influence of the thickness of the infusion tube is enabled. 1st finger 10-1
When the infusion tube 2 is completely closed by closing the infusion tube 2, the infusion tube 2 spreads right and left, so that the width W1 of the first finger 10-1 and the fourth finger 10-4 is different from that of the other fingers. Is larger than the width dimension W2. The fifth finger 10-5 is for correcting pulsation, and its function will be described later.

In the case of the normal peristaltic movement system, it is possible to perform the peristaltic movement of the infusion tube by completely crushing the infusion tube by setting all the fingers 10-n to be the same as the second finger 10-2a. it can. In addition, as described later, the second finger 10-2a, 2b and the third finger 1
Since the set of 0-3a and 3b are driven by the same stroke, the same reference numerals are attached, but they may be driven individually.

Next, the door base 4 is configured to be opened to the left with respect to the main body base 3 by means of a hinge block 65 and a pin which will be described later, and the display unit 8, the key panel unit 9, the operation indicator 6, Power supply to the door light 64 arranged as shown in the drawing near the turning position is performed by a flexible cable 63 which is resistant to repeated bending. A substantially central portion of the door base 4 is provided with a back plate mechanism 13 so as to face the pump mechanism 100.
0 is provided.

The back plate mechanism 130, which is the first receiving plate member, is provided so as to face each finger 10-n of the pump mechanism 100 to form a pressure receiving surface by the finger, which will be described later. As described above, the infusion tube is moved in the front-rear direction of the paper surface, and is retracted when some overload occurs to prevent the infusion tube from being damaged. Since the first finger 10-1 and the fourth finger 10-4 completely close the infusion tube, the back plate member 131 serving as the second receiving plate member is opposed to these fingers. The back plate base 132 is provided so as to individually move in the front-rear direction on the paper surface.

Next, the arrangement of each mechanism and the substrate in FIG. 4, 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 integrally forms a shape portion 3t for detachably accommodating the pump mechanism 100 shown by a broken line in the figure together with the jaw 3a. . This jaw 3a
Is formed as high 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 forms an upper frame portion of the apparatus by fixing an upper plate 111 as an upper plate member made of aluminum die-cast as shown in the figure. Also,
A back plate 1 which is a back member processed from an iron plate having a thickness of about 1 to 2 mm is provided on a back portion of the upper plate 111.
12 is a mounting portion 1 provided with a screw hole of the upper plate 111.
At 11d, it is fixed with two screws 110 and forms a rear frame portion on the rear side of the apparatus. A lower plate 113, which is a lower plate member, is fixed between the lower portion of the main body base 3 and the back plate 112 by screws 110, and forms a bottom frame portion of the apparatus. In this way, the main body base 3, the upper plate 111, the back plate 112, and the lower plate 113 form a strong closed main body frame.

As described above, the upper and lower and rear plates and the protective 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. Since sufficient rigidity is secured, the mechanism and the circuit board and the like can be protected in the event of a fall, and the effects of electromagnetic waves and the like can be minimized.

A bearing block 103 having a built-in bearing for rotatably supporting the camshaft 102 is fixed to upper and lower portions of the shape portion 3t of the main body base 3. The shaft body at the upper end of the camshaft 102 has a toothed pulley 1
04 is fixed with a screw (not shown). Also, upper plate 1
A stepping motor 106 is fixed to the output shaft 11 with a toothed pulley 107 having a smaller diameter than the toothed pulley 104 on the output shaft fixed by a screw (not shown), and a toothed belt 105 stretched between the pulleys. The torque of the stepping motor 106 is transmitted to the camshaft 102. The flange of each pulley is provided on only one side as shown in the figure so that the toothed belt 105 can be attached or detached without removing the stepping motor 106 when assembling or replacing the belt.

Further, an eccentric cam-shaped portion corresponding to the finger 10-n is integrally formed on the outer peripheral surface of the camshaft 102, and by ensuring accuracy, it is possible to use an infusion tube with high dimensional accuracy. For example, the flow rate accuracy is guaranteed within ± 5%. This integral camshaft 102
It is formed of stainless steel such as SUS304.

The rotation detecting sensor 108 is for reading the rotation position and the number of rotations of the camshaft 102 by optically reading a timing disk (not shown) attached to the upper surface of the toothed pulley 104. , Are fixed to a mounting portion 111c integrally formed on the upper plate 111. A bracket 117 is fixed to the back surface of the decorative cover 12a, and a screw 1 is inserted into screw holes formed on both sides of the bracket 117.
At 10, the rear face side of the decorative cover 12 a of the main body is fixed by being fastened to the upper plate 111 b together with the decorative cover 12 a. A bracket 109 is fixed to the screw hole of the handle 5 with a screw 110 on the back surface of the decorative cover 12a, and the left and right ends of the bracket 109 are formed in holding holes formed on the back surface of the main body base 3. The decorative cover 12 is fixed to the main body base 3 so as to penetrate. As a result, the load applied when transporting the device while holding the handle 5 is
9 to the main body base 3.

The back plate 112 is disposed behind the motor 106 as shown in the figure, and serves as a mounting base for the back substrate 13 on which a power supply connector and the like are mounted. The battery unit 116 is arranged below the motor 106 so that the battery can be replaced via an opening 113a formed in the lower plate 113. For this purpose, a back cover 308 for closing the bottom of the decorative body cover 12 a is provided so as to be screwed to the lower plate 113. Also, this back cover 308
A fixing screw hole member 307 for fixing the entire apparatus to a stand is fixed to the stand.

Regarding the configuration on the door base 4 side, the same reference numerals are given to the components already described, and the description thereof is omitted, but the backlight 58 (see FIG. 4) is provided behind the display unit 8. , And the lower side of the door base 4 is in a positional relationship protected by the jaw 3a.

In FIG. 5, the door base 4 is omitted. In this drawing, the components already described are denoted by the same reference numerals, and the description thereof will be omitted. Only the unexplained portions will be described. First, the left and right edges of the main body base 3 are integrally formed with projections 3f for protecting the left and right edges of the door base 4 so as to be wider than the door base. A hinge pin 115 is implanted in the left jaw 3a. A hole formed in the door base 4 is inserted into the hinge pin 115, and the hinge block 65 is fixed to the main body base 3 with the screw 110. By doing so, the door base can be opened and closed freely.

The above-described pump mechanism 100 has a shape 3
After being fixed to t with the six screws 110, the small radial bearing 120 of the finger described later comes into contact with the cam surface 102 a of the camshaft 102. Further, the upper plate 111 is shaped so as to escape the toothed pulley 104 as shown in the figure, so that the upper plate 111 can be fixed in a state where the camshaft is fixed, so that the camshaft 102 can be fixed after assembling at the time of assembly. In this way, an order mismatch does not occur. The battery unit 116 has a shape as shown and is fixed to the lower plate 113. On the other hand, the flexible cable 63 extends from a main mounting board 14 described later, and
The contact portion is configured to appear as shown in FIG.

As described above, it is assembled using the screws 110 and assembled as shown in the external perspective view of FIG. In the figure, the components already described are denoted by the same reference numerals, and description thereof will be omitted. As shown in the figure, a protection plate 118 having a large number of large opening holes 118a is provided as an upper plate 111. Side and lower plate 1
The screw 110 is fixed to be screwed into the screw hole formed on the side surface of the thirteen.

The main mounting board 14 for storing a program to be described later and performing predetermined control is provided with a plurality of connectors arranged upward as shown in FIG. The screw 110 is screwed into a screw hole formed on the side surface of the upper plate 111 so as to be fixed. The main mounting board 14 is designed to be strong against external noise by setting a wide grounding pattern and taking into consideration the mounting pattern of each electronic component. It can be used in the operating room.

Next, FIG. 7 is an external perspective view showing a finger assembling part constituting the pump mechanism 100. FIG. In this figure, a pump base 101 is integrally formed into a shape as shown from a resin material of a predetermined material in consideration of chemical resistance. As shown, seven guide holes 101c are formed through the pump base 101, and small bearings 120 are inserted into the guide holes 101c in advance by inserting the small bearings 120 into the finger holes 10c. In step 119, the finger that is pivotally supported is loaded. These fingers are the first finger 10-1, the second finger
Finger 10-2a, 2b, third finger 10-3
a, 3b, fourth finger 10-4, fifth finger 1
Prepared as 0-5. At the time of this loading, the shapes of the first finger 10-1 and the fourth finger 10-4h are different from the shapes of the other fingers due to the formation of the convex portion 10a on the upper surface 10b as described above. It can definitely be assembled to 101.

After each finger is loaded on the pump base 101 in this way, the compression coil spring 121, which is a biasing member for biasing each finger, is loaded, and the retaining ring 122 is inserted into the groove 10d in the direction of the arrow. By setting, each finger moves to the camshaft 102 side.

On the other hand, as shown in the figure, the pump base 101 has a peak 1 formed continuously from the sliding surface 101d of the finger.
01b are integrally formed on the left and right, and the infusion tube 2 is held in a state where the back plate base 132 of the back plate mechanism 130 is in contact with these ridges 101b. Further, finger guide portions 101f corresponding to the first finger 10-1 and the fourth finger 10-4.
Is set larger than the width dimension of the other finger guide portion 101e.

Next, FIG. 8A is a three-dimensional exploded view of the back plate mechanism 130. FIG. FIG. 8B is a cross-sectional view shown together with the pump base 101 described above.

First, in FIG. 8A, the back plate base 132 is integrally formed from a resin material of a predetermined material in consideration of chemical resistance into a shape as shown. The peak portion 132b of the back plate base 132 is formed so as to have a positional relationship of infiltrating between the peak portions 101b of the pump base 101 as shown in FIG. 2 can be transmitted. Also, the back plate base 132 has a back plate member 131 provided so as to face the first finger 10-1 and the fourth finger 10-4.
Is set from behind as shown in the figure, and a hole 132a is formed integrally so that only the projection 131a of the back plate member 131 is exposed. In order to fix the back plate 132 formed as described above to the door base 4 as described above, first, a pair of small compression coil springs (second urging members) 135 are connected to the back plate member 131.
And four large compression coil springs (first urging members) 136 are set between the spring seat of the door base 4 and the back plate base 132, and
The collars 137 are interposed between the screw holes 4k of the door base 4 and the screws 110 are inserted into the screw holes 132c and fixed so as to be screwed together. Similarly, the back plate member 1
The protrusion 131a of the infusion tube 31
When an overload is applied due to excessive blockage, the device is retracted to prevent damage.

Next, FIG. 9 is a front view of the camshaft 102, showing the cam surfaces along with a sectional view taken along the line Xn-Xn. In this drawing, the camshaft 10
The greatest feature of 2 is that the cam member is not fixed to the common shaft body at a different angle as in the conventional case, but for example, stainless steel such as SUS304 is illustrated by a numerically controlled lathe processing apparatus. The point is that the shape is integrally cut or integrally ground. By performing the integral processing in this way, it is possible to prevent variations among components, and thus it is possible to perform the above-described highly accurate infusion.

The first finger 10-1 contacts a small bearing with the first cam surface 102-1.
The second fingers 10-2a and 2b are connected to the second cam surface 102-
2, the third fingers 10-3a and 3b abut against the third cam surface 102-3, and the fourth finger 10-4 abuts against the fourth cam surface 102-4. 5
The finger 10-5 is configured to abut on the fifth cam surface 102-5 so that each finger reciprocates between the top dead center and the bottom dead center. Grease is appropriately applied to each cam surface.

FIG. 10 is an operation explanatory view showing the relationship between the finger 10-n and the closed state of the infusion tube 2, and FIG. 11 shows the first finger 10-1 and the second finger 10-2.
a, 2b, the distance (stroke) from the center of rotation of the camshaft 102 to the cam surface for reciprocating each of the third fingers 10-3a, 3b, the fourth finger 10-4, and the fifth finger 10-5. FIG. 4 is a diagram showing one rotation.

In both figures, when the start switch 19 (see FIG. 1) is depressed to start feeding the liquid, the stepping motor 106 (see FIG. 6) that is driven to rotate according to the flow rate setting.
Is performed, and in the state (A), the infusion tube 2 is completely closed with only the fourth finger 10-4,
The liquid medicine in the liquid medicine bag is caused to flow. Next, in the state (B), the first finger 10-1 is completely closed, and the chemical solution is confined between the upstream side and the downstream side.

Subsequently, in the state (C), the fourth finger 10-4 is retracted, and the drug solution is sent out by pressing the infusion tube 2 halfway by the second fingers 10-2a and 2b. Following this, in the state (D), the third finger 10
The liquid is delivered by pressing the infusion tube 2 halfway by the movement of -3a and 3b. Subsequently, in the state (E), the fourth finger 10-4 starts moving so as to be completely closed, and the fifth finger 10-5 starts moving quickly so as to be in the state (F). By repeating the above series of operations, the liquid is sent by a peristaltic motion that is not completely closed. Here, by causing the fifth finger 10-5 to start moving quickly, the pulsation generated by the operation from the state (A) to the state (E), which is generated when a particularly high flow rate is set. To approach rectification.

FIG. 12 is an external perspective view showing an attached state of a shock sensor 140 for detecting 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. Shock sensor 140
Is mounted on the main mounting board 14 as shown in the figure, so that weight detection in all XYZ directions can be performed.

That is, in the case where the shock sensor 140 has sensitivity in the longitudinal direction, the piezoelectric sensor that captures pressure as a change in the electric signal is connected to the X axis along the left and right lateral directions of the pump device 1 and the front and rear directions. Angles θ1, θ2 as shown in the figure with respect to the Z direction along and the Y direction along the vertical direction.
By mounting and fixing the shock sensor 140 in such an inclined state, it becomes possible to detect the load applied in the up, down, left, right, front and rear directions with one shock sensor 140.

As described above, when the load is detected in all directions by one shock sensor 140, the sensitivity in each direction is reduced by the inclination angle, but the cost can be reduced because only one amplifier circuit is connected to the shock sensor 140. If the angle θ1 and the angle θ2 are each set to a predetermined angle (for example, 45 degrees), it is possible to sufficiently adopt the cost reduction. The shock sensor 140 recognizes a shock when a shock detection signal is input. The shock is detected as a port input (shock sensor signal), and a shock warning is stored in a storage unit of the control unit 200. ). The latch of the shock detection is released when saved in the history, and the shock sensor warning is displayed in the history mode.
The details will be described later together with the history function. When the history switch 50 is pressed, the mode is switched to the history mode, and the shock history and the driving operation history are displayed together with the date and time.

Next, FIG. 13A is a block diagram showing the structure of the bubble sensor 60. FIG. 13B is a detection waveform diagram for explaining the conventional bubble detection principle.

First, in FIG. 13 (b), conventionally, an ultrasonic transmitting oscillator and a receiving oscillator are provided so as to face each other and sandwich an infusion tube. When the bubble K is mixed in the infusion tube 2, the transmission / reception vibrator obtains a detection waveform 150 as shown by a solid line, and the transmission / reception vibrator obtains a detection waveform 150 shown by a broken line. By obtaining a time T1 in a range where both the waveforms which are equal to or less than the predetermined level V1 shown above are overlapped, if this time T1 is equal to or longer than the set time, it is determined for the first time that a bubble of a predetermined length (size) is mixed. , To the control unit.

However, such detection is as effective as possible in the case of constant flow rate control, but as described above, the flow rate setting range is as small as 0.1 to 1200 mL / max.
In the case of h, it cannot be adopted.

Therefore, as shown in FIG. 13A, the transmitting side oscillator (transmitting section) is provided to the transmitting circuit 142 for transmitting the ultrasonic wave.
143, and connects the upstream receiving oscillator (receiving unit) 144 and the downstream receiving oscillator (receiving unit) 145 with the allowable length L of the bubble K.
Are arranged at predetermined intervals so as to have a distance of L, and are connected to the receiving circuit 146 via the signal switching circuit 147 and connected to the bubble detecting circuit 236, and are generated from the common transmitting side vibrator 143. The bubble detection circuit 236 detects (determines) the presence of bubbles only when the ultrasonic waves to be detected are simultaneously detected by the upstream reception transducer 144 and the downstream reception transducer 145, and can be applied to a large variation in the flow rate setting range. Like that.

That is, in the flowchart for explaining the operation of the bubble sensor shown in FIG. 16, in step S21, it is determined whether or not the upstream receiving vibrator 144 is in an on state larger than the reference value, and is determined to be in the on state. Then, the process proceeds to step S22, where it is determined whether or not the downstream receiving vibrator 145 is in an on state larger than the reference value. If it is determined that the downstream receiving vibrator 145 is on, it is determined that a bubble is present in step S23, and a flag is set. By forcibly stopping the motor in step S24, bubbles are generated by the bubble sensor 6.
0 is prevented from being sent downstream. Thereafter, the process proceeds to step S25, and the character display of "bubble" is displayed on the bubble abnormality display unit 2.
8 to end the process (step S26). If it is determined in steps S21 and S22 that the switch is not on, the process proceeds to step S27 and returns.

When the presence of air bubbles is detected in this way, a bubble alarm is sounded by sounding a buzzer, and
The display of the bubble abnormality display section 28 in FIG. 1 is blinked.

The bubble sensor described above recognizes a bubble alarm when a bubble of a predetermined length (about 5 mm in length) passes through the tube (the detected bubble length can be changed in the self-diagnosis mode). A switching function is provided. For this purpose, an AD (analog-to-digital conversion) input is employed as a detection method in order to adjust the above-described ON detection state of the bubble detection sensitivity. Recognition of alarm status is performed on two channels (A,
The reception signal of B) is alternately monitored and monitored, so that an alarm is generated when the above-mentioned condition of AD value ≦ reference value continues for a time corresponding to the bubble length. Further, the alarm is canceled when the reference value is smaller than the AD value. Furthermore, the determination of the bubble detection warning is such that a bubble warning is generated when the state in which the sensor output voltage is equal to or lower than the reference value (both channels) continues for a time (S [sec]) obtained by a predetermined calculation formula. I have to.

At this time, the signal detection cycle is 2.5 ms, the bubble alarm display blinks, the buzzer sounds with an intermittent sound (continuous sound), and the infusion is forcibly stopped. Thereafter, the alarm factor is removed and the door cannot be started unless the door is opened and closed once. Even if the cause of the alarm is removed, if the start switch 19 or the fast-forward switch 36 is not pressed, the alarm display is continued, so that the alarm display cannot be restarted unless air bubbles are mixed. The reference value and the predetermined program are stored as ROM data.

Next, FIG. 14 is a block diagram of an infusion pump. In the figure, a main central control unit 201a and a sub-central control unit 201b, each of which is a dedicated LSI serving as a central processing unit 201, are mounted on the main mounting board 14, and as shown in FIG. By connecting various circuit configurations, the entire control unit (control means) 200 is configured.

From the upper left of FIG. 14, the clock unit 203, which receives a backup power supply from a lithium battery 204 independent of the power supply of the pump device, is connected to the central control unit 20.
1 so that time measurement is performed even when neither the external power supply nor the built-in battery is supplied with power. 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 201a includes a storage unit 206 for storing a set infusion volume and a scheduled volume, a usage history unit 207 for storing a usage history, and a A shock history unit 208 for storing the date and time of occurrence of an impact by the sensor 140, a blockage storage unit 209 for storing blockage when a blockage condition occurs, and another storage unit 210 for storing gamma amount and time. , And can be stored.

The external communication unit 211 composed of an external communication terminal and an external communication circuit indicated by a broken line is directly connected to the main central control unit 201a to enable data collection using a personal computer. I have.

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

Further, an AC power supply connector 49 provided on the back of the apparatus is provided with a filter 216 for rectifying noise components and pulsation via a fuse provided in the fuse holder 39 so as to be freely mounted, a power supply section 217, and a charging circuit. 218 is connected to the battery unit 116 as shown. Since the battery unit 116 is a rechargeable secondary battery composed of eight nicad battery cells as shown in FIG. The voltage is monitored by a battery monitoring circuit 222 connected as shown to the voltage detection circuit 221 to be monitored. When the voltage decreases, the display and alarm are generated as described above.
The power switch 15 includes a power switch on / off circuit 219 connected to the power circuit 220.
7 are connected so as to receive power supply.

The shock circuit 225 includes the shock sensor 14
0, and sends an impact generation signal of an impact caused by a drop generated by the shock sensor 140 to the control unit 201 when an impact force is applied due to a drop of the infusion pump 1 or rough handling. , 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 amount, an estimated infusion amount, and an infusion accumulated value is connected to the central control unit 201. The display is performed based on the code to be executed. The motor rotation detection circuit 23 connected to the central control unit 201 includes the rotation detection sensor 108.
1 is connected, and an output corresponding to the rotation speed and rotation speed of the stepping motor 106 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 so as to drive the pump mechanism 100. A buzzer driving circuit 233 is connected between the buzzer 70 built in the device 1 and the central control unit 201, and the central control device 2 is used to change the sound according to the operation state.
01 is controlled by a buzzer volume variable circuit 234 that generates a predetermined tone and volume.

Sensor 6 for detecting upstream and downstream blockages
The central control unit 20 includes
1 is connected to the blockage detection circuit 235,
The detection output is sent according to the blockage. In addition, the above-mentioned transmission-side vibrator 143, upstream reception vibrator 144, downstream reception vibrator 145, reception circuit 146, signal switching circuit 14
7 includes a central control unit 2.
01 is connected to the central control unit 201 to inform the central control unit 201 of the inclusion of bubbles longer than the reference length. A door sensor 90 is provided on the door lock lever 7 and the main body base 3. The door sensor 90 detects the open / closed state of the door, and a door open / close detection circuit 237 connected to the central control unit 201 provides a door sensor 9.
0 is connected to inform the control unit 201 of the door open / closed state.

A temperature sensor (temperature detecting section) 95 for mainly detecting the ambient temperature as the operating temperature of the infusion tube 2 is built in the infusion pump 1 at a predetermined distance from the infusion tube 2. Control unit 201
Is notified of the detected temperature to a temperature detection circuit 238 connected thereto, so that motor control correction described later can be performed.

An operation switch in which each key switch for constituting the key panel section 9 is wired in a matrix shape is connected to the central control section 201, and is configured to perform control based on operation of each key. ing.

Next, FIG. 15 is a flowchart showing a use procedure. In this figure, the above-described infusion pump 1
Is used for normal infusion with reference to FIG. The case of gamma injection will be described later.

After confirming the medical record or the health condition of the patient to be infused, in step S1, an infusion bag containing a predetermined drug described later is hung on a stand, and the infusion tube 2 is connected to the infusion bag. To detect a flow rate abnormality or free flow, after connecting the infusion probe 302 to the infusion probe connection connector 53, the infusion set switch 54 is switched in accordance with the number of drops of the infusion tube 2, and the infusion probe 302 is connected to the infusion tube. 30
Attach to 1. Next, in step S2, the power switch 15 is pressed so as to be turned on for a predetermined second (about one second) while the door base 4 is kept open. Subsequently, in step S3, all the displays blink three times. At the same time, it is confirmed that the buzzer sounds and the finger 10-n slightly moves. If these are not executed, it is determined that a failure has occurred, and no further operation is performed. Following step S3, step S
In 4, the displayed characters of air bubble, blockage, and door blink, which is confirmed.

In the steps S1 to S4, the so-called initialization of the central control unit is performed.

In the following step S5, the AC / DC lamp 17 is turned on. When a probe is used, “15” or “60” of the drop number display section 25 of the infusion set is used.
Is displayed to indicate that the IV probe has been connected successfully.

In the next step S6, after the release lever 46 is pushed to release the tube clamp 47, the infusion tube 2 is trimmed, and a part of the infusion tube 2 from the infusion bag is fixed to the tube holder 5a. The door base 4 is set straight in the groove 3m of the main body base 3 so as not to bend, and the door base 4 to which the door decorative cover 12b provided with the door lock lever 7 that has been moved to the unlocked state in advance is fixed. So that it turns
The lever 7 is moved downward to fix the door to the base.
Since the setting of the infusion tube 2 is completed as described above, subsequently, the lower right key of the up / down switch 22 is simultaneously pressed while keeping the predetermined flow rate switch 33 pressed to set the occlusion pressure to one of three stages. "PrES" is displayed on the expected flow rate display section 33, and the setting mode of the closing pressure is set. Therefore, while pressing the expected flow rate switch 33 as it is, simultaneously pressing the lower central key of the up / down switch 22. Each time, the pressure level is switched in three stages, so that the desired closing pressure is turned on to set the closing pressure.

Here, the detection range of the blockage detection pressure is, for example, 1
3.3 to 133.3 kPa (0.1 to 1.4 kgf / square cm), which can be set in a plurality of predetermined steps. For example, a set value which can be set in three steps is about 90 k when "H".
Pa (about 0.9 kgf / square cm), about 6 for "M"
0 kPa (about 0.6 kgf / square cm), and about 30 kPa (about 0.3 kgf / square cm) for "L".
This setting step can be set to 2 to 5 steps or more.

Further, in order to switch the volume of the alarm sound to three levels, while continuing to press the predetermined flow rate switch 34,
At the same time, each time the upper right key of the up / down switch 22 is pressed, a small volume "b-
Since the volume level is switched between three levels, that is, “1”, “b-2” in the middle, and “b-3” in the large, the desired volume is set to large, medium, and small.

Then, the process proceeds to a step S7, wherein the up / down switch 2 corresponding to each display digit of the expected flow rate display section 33
By pressing any one of the upper and lower keys 2, the flow rate is set, and the flow rate setting switch 34 is pressed to complete the flow rate setting and switch to the planned volume setting mode.

Following step S7, in step S8, by pressing the up or down key of the up / down switch 22 corresponding to each display digit of the expected flow rate display section 33,
Set the scheduled amount. After the above setting, step S
At step 9, the clamp is opened, and at step S10, a venous needle is punctured into the vein of the patient.

Thereafter, the infusion is started by pressing the start switch 19 in step S11, and the infusion is started in step S11.
At 12, the operation indicator 6 flashes green. Then, in the subsequent step S13, when the infusion of the predetermined amount is completed, the character "Complete" blinks. Subsequently, in step S14, the buzzer is turned on to notify the end of the infusion. At this time, the keep-vein open function is activated and the 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 vane open function is continued. Next, when the stop / mute switch 18 is pressed again in step S17, the operation indicator 6 is turned off, the stop display lamp 21 blinks orange, and at the same time, the keep-vein open function is canceled (step S18).
The procedure of the basic operation has been described above, and the functions to be described later are activated by turning on the start switch 19 in step S11 as triggers.

Next, the operation of the blockage detection will be described with reference to the blockage detection flowchart of FIG. In this figure,
When the infusion pump 1 is started in step S11 in FIG. 16, this program is started. First, in step S30, the large and medium small occlusion set pressure is checked to temporarily store the occlusion set pressure. Thereafter, the process proceeds to step S31, where the first data transmitted from the upstream blockage sensor 61 after being converted from analog to digital is compared with the blockage set pressure, and if it is determined that the value is higher than the set pressure, the upstream blockage sensor 61 It is determined that 61 is "ON" and that it is in the closed state, and the process proceeds to subsequent step S32.

In step S32, the analog / digital conversion data sent from the upstream occlusion sensor 61 at a predetermined cycle (for example, 100 ms) is repeated a predetermined number of times (for example, three times).
Times) to obtain a moving average and compare it with the above set blockage pressure. When it is determined that the moving average is larger than the set blockage, the blockage detection circuit 235 determines that blockage is present.

Here, the moving average is 3
This means that data is sequentially updated at a period of 100 ms to obtain an average. If it is determined in step S32 that blockage is present, a flag for forcibly stopping the motor is set, and in step S33, the stepping motor 106 is forcibly stopped. Before or after this, in step S34, the character "block" blinks on the blockage abnormality display unit 26 to indicate that blockage has occurred, and the process ends (step S35).

If it is determined in step S32 that the moving average is smaller than the occlusion set value, the process proceeds to step S37 and returns.

On the other hand, in step S31, the upstream blockage sensor 6
If the analog-to-digital conversion data sent from step 1 is equal to or less than the set occlusion pressure, the process proceeds to step S36, where the first data converted and sent from the downstream occlusion sensor 62 by analog-to-digital conversion is compared with the above set occlusion pressure. If it is determined that the pressure is higher than the set pressure, the downstream occlusion sensor 6
It is determined that the moving average is larger than the blockage setting value as in the case of the upstream blockage sensor 61 by determining that 1 is “ON” and is in the closed state, and proceeding to the subsequent step S 32, similarly to the upstream blockage sensor 61. It is determined that there is a blockage.

If it is determined in step S36 that the moving average is smaller than the blockage set value, it is determined that sudden blockage has occurred, and the flow advances to step S37 to return.

As described above, by always monitoring the blockage of the infusion tube 2 on the upstream side and the downstream side with the pump mechanism 100 interposed therebetween, it is possible to perform more secure liquid feeding. It is also possible to cope with a case where it is necessary to constantly monitor the blockage of the infusion tube 2 between the upstream side and the downstream side.

Next, FIG. 18A is a flow chart for explaining the operation for storing the date and time when the impact force is generated by the shock sensor 140 connected to the above-mentioned shock circuit 225. Step S11 in FIG. Infusion pump 1
This program is started when is started. FIG.
FIG. 8B is a flowchart illustrating an operation of storing the date, time, and date of occurrence of an impact force by the shock sensor 140 when the power switch is off.

First, in FIG. 18A, step S
Receiving the signal from the power-on in 41 updates the current date in step S42. 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 manner, while waiting while updating, in step S43, XY as described above is performed.
The shock sensor 140 fixed so as to have sensitivity by one sensor in the Z direction generates an impact detection signal by an impact force (G) exceeding a predetermined value due to dropping or improper handling of the infusion pump 1, and the shock sensor signal Is recognized in step S44, the date and time of the impact 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 occurrence of the shock in the shock history are displayed on the display unit 8 together with the driving operation history.

On the other hand, in FIG. 18B, when the power switch is off, an impact detection signal is generated due to the drop or improper handling of the infusion pump 1 in step S47, and when the infusion pump 1 is recognized as a shock sensor signal, an impact is detected. Only that the force has been generated is stored, and step S49 is performed.
When the power switch is turned on, the occurrence of an impact is stored in the same manner as in FIG.

As described above, the generation of an impact force is constantly monitored not only when the power is turned on but also when the power is turned off, so that when a malfunction occurs in the operation of the infusion pump 1, it is possible to help find the cause. Can be The shock sensor 140 is set so as to detect a drop with a height difference equal to or greater than a set height difference or an impact generated by an external force equal to or greater than a predetermined value.

FIG. 19 is a flowchart for explaining the standby function. If the infusion pump 1 is ready to start the infusion and the infusion is not started even after a lapse of about two minutes after the elapse of the predetermined time, the operation indicator 6 flashes red and a buzzer is turned on, and a start forgotten alarm that prompts the start is given. Yes, but this alert can get in the way. For example, in a case where an infusion pump is set on a patient in an operating room before the operation is started and the operator waits for the operation by an operating doctor, the user often waits for a predetermined time (for example, two minutes) or more.
Under such circumstances, a standby function is required. In addition, in some cases, infusion may not be started within two minutes after the infusion pump 1 is ready to start infusion for some reason known in advance. In such a case, the standby function may be set. The alarm can be canceled with.

In FIG. 19, when the preparation for infusion start is completed for 2 minutes or more, the buzzer sounds in step S51 and the operation indicator 6 flashes red at the same time. Then, the operation proceeds to step S52, and the stop mute switch 18 is used as an operation input for inhibiting the generation of the alarm sound.
By holding down for more than a predetermined second (for example, 2 seconds),
As a means for clearly indicating that the buzzer stops sounding and the alarm is prohibited, the operation indicator 6 blinks red to green and red alternately. As described above, the standby mode is set in step S55, and this state is maintained. In step S56, the process waits for the start switch 19 to be turned on as a release unit for releasing the inhibition of alarm occurrence. In step S57, the standby mode is released. Then, the process proceeds to step S58 to start the infusion.

By providing the standby function as described above, the trouble caused by the buzzer sounding every predetermined time (two minutes) is released.

The flow rate setting range is 0.1 mL / h to the maximum 1
When the flow rate is as wide as 200 mL / h, the flow rate accuracy tends to change depending on the flow rate as shown in FIG.

Since such a tendency has reproducibility, if the rotation speed of the stepping motor 106 is corrected stepwise so as to correct the increase / decrease tendency, an infusion with an increase / decrease close to zero becomes possible. FIG. 21 is a flowchart of a program for driving the stepping motor 106 by correcting the rotation speed in a stepwise manner. In this figure, when the infusion pump 1 is started in step S11 in FIG. 15, this program is started. In step S61, the set flow rate set value is confirmed, and the process proceeds to the next step S62, where the flow rate is set at 25 mL / h. Infusion or 25 mL /
h or less than 25 mL / h.
A correction value is selected based on a characteristic value indicated by a solid line of a graph stored in advance in step 213 and based on the above-described measurement result, and a correction value H shown by a broken line in which the correction value is inverted.

Subsequently, in step S63, the correction value selected as described above is input to the program for driving the stepping motor, thereby correcting the rotation of the motor.

As described above, highly accurate infusion can be performed in consideration of the flow rate change in the flow rate setting range of 0.1 to 1200 mL / h, which is the minimum. Further, it is needless to say that it is more ideal to perform the correction in a curved manner, instead of the stepwise correction as described above, as long as the storage capacity can be secured.

The infusion tube hardens at a low temperature and hardly deforms, and at a high temperature softens and deforms easily. For this reason, even if the same infusion tube 2 is set, the actual flow rate changes with the temperature change, and it hardens at a low temperature, so that it cannot follow the finger pressing sufficiently and cannot be deformed.
While the flow rate decreases, the flow rate increases due to the softening and excessive deformation of the infusion tube at high temperatures.

FIG. 22 is a measurement result showing the temperature-dependent flow rate change of the infusion tube. As shown, the flow rate changes substantially linearly and almost in proportion to the temperature rise.

Therefore, by performing the motor rotation correction by inverting the substantially linear characteristic, the change in the flow rate due to the temperature change can be corrected to substantially zero.

FIG. 23 is a control flowchart for driving the stepping motor in consideration of the temperature correction. When the infusion pump 1 is started in step S11 in FIG. 15, this program is started, and in step S65, the temperature detection unit 95 is started. Detects the ambient temperature (operating temperature) and temporarily stores it. Thereafter, the process proceeds to step S66, in which it is determined whether the reference temperature is equal to or higher than 25 degrees C. If the temperature is equal to or lower than 25 degrees C, the operation temperature (detection temperature) detected in step S67 is decreased. Accordingly, the motor rotation speed (rotational speed) is corrected to be higher by obtaining correction data with reference to a correction table stored in advance. If it is determined in step S66 that the detected temperature is equal to or higher than 25 degrees C.
At 68, the motor rotation speed is corrected lower by obtaining correction data by referring to a correction table stored in advance according to the detected temperature.

As described above, the set flow rate and the temperature dependence described above with reference to FIGS. 20 to 23 are individually or simultaneously performed to correct the motor rotation speed, so that the set flow rate is set within a large range. In addition, even when the temperature difference to be used is large, the error in infusion accuracy can be reduced.

Since the infusion pump 1 is often used for 24 hours, the door light 64 which is automatically turned on day and night when the door is opened as described above is provided near the hinge of the door. The setting state of the infusion tube 2 can be checked at night without turning on the room light.

FIG. 24 is a flowchart for explaining the operation of the backlight 58 provided in the display section 8. In this figure, when infusion is started by turning on the start switch 19 in step S11 of the above-described flowchart of FIG.
Is activated in the same manner, and when the display brightness switch 55 of the sleep mode setting means is pressed in step S72, the light amount of the backlight 58 is reduced so that the illumination does not hinder the patient from going to bed. At the same time, the operation indicator 6 that is blinking green is turned off. If an abnormal state of air bubbles, blockage, or occurrence of air bubbles is detected in step S74 as described above, the process proceeds to step S75, in which the amount of light of the backlight 58 is returned to its original value and the operation indicator 6
Flashes red to alert the patient or nurse that an alarm condition has occurred. In this way, the brightness of the backlight 58 of the display 8 can be changed, so that it does not bother other patients who are sleeping at midnight.

After step S75, step S7
The door light 64 is turned on when the door 4 is opened in order to perform a procedure such as a nurse resetting the infusion tube 2 to reset the infusion tube 2 by proceeding to step 6, and the door 4 is closed when the procedure is completed. In step S77, the backlight 58 is automatically dimmed, and the operation indicator 6 flashes green. Thereafter, the infusion is resumed.

As described above, the display unit 8 is operated by operating the display brightness switch 55 provided in consideration of use at night.
Therefore, even if the backlight 58 provided in the device is operated in a dimmed state, the backlight is automatically returned to the original light amount when an alarm occurs, which is safe. Also,
The brightness of the backlight 58 can be changed continuously or stepwise by operating the display brightness switch 55.

FIG. 25 is a front view of another embodiment of the infusion pump 1 and shows an operation switch panel of the infusion pump in which a gamma injection mode can be set in addition to the above functions. In this figure, the same reference numerals are given to the components already described in FIG.
, A display on / off switch 44 and an item changeover switch 45 are provided below the up / down switch 22.

The gamma amount display unit 43, the weight display unit 42, and the medicine amount display unit 4 are located below the alarm display units.
1. A solution amount display section 40 is provided, and gamma amount (μg / kg / min), body weight (k
g), the amount of drug (mg), and the amount of solution (mL) are indicated by numerals as shown.

In the infusion pump configured as described above, in order to perform gamma injection, the display on / off switch 44 as a setting mode change switch is set for a predetermined period of time (for example, approx. If the button is pressed for more than 2 seconds, the built-in program starts and the mode shifts to the gamma injection mode. Thereafter, each time the item switch 45 as a setting item changing means is pressed, the gamma amount, body weight, medicine amount, and solution amount are displayed in the gamma amount display section 43, the body weight display section 42, the medicine amount display section 41, and the solution amount display section. At 40, it is displayed blinking sequentially. Since the blinking portion can be set, each item is set by pressing the up / down switch 22 as the gamma injection setting means.

The range in which the gamma injection can be set at this time is, as summarized in FIG.
9.99 μg / kg / min (0.01 μg / kg / m
in step) and weigh 0.1-300.0 kg
(0.1 kg step), the amount of drug is 0.1-999.9
mg (0.1 mg steps) and the solution volume is 0.1-9
It is 99.9 mL (0.1 mL steps). Further, when the calculation result of the flow rate becomes 1200 mL / h, the flow rate is displayed as “−−−−−” because the capacity of the infusion pump is exceeded, and the resetting is encouraged.

When the gamma injection is stopped, the display is turned off by pressing the stop / mute switch 18 and then the display on / off switch 44 is kept pressed for a predetermined time (about 2 seconds). The body weight display unit 42, the medicine amount display unit 41, and the solution amount display unit 40 are turned off, and the flow rate can be set.

FIG. 26 (b) shows a flow rate calculation formula in the gamma injection mode, which is stored in a program which is started when the display ON / OFF switch 44 is pressed and held for a predetermined second (about 2 seconds) or more as described above. Gamma amount (μg / kg
/ Min), body weight (kg), amount of drug (mg), and amount of solution (mL) are input to this flow rate calculation formula, the flow rate is calculated by the central control unit, and displayed on the expected flow rate display unit 33. In the formula for calculating the flow rate, * 1 indicates a time unit of mi.
Coefficient for converting from n to h, * 2 means mg in weight
Is a coefficient for converting from to μg. Subsequently, gamma injection is performed by performing the operation after step S8 in FIG.

The gamma setting values can be stored, and the setting values of the gamma injection used so far can be automatically stored and updated, and can be sequentially called. For this purpose, when the gamma injection setting display section is turned on and the item switch 45 is pressed while the display on / off switch 44 is kept pressed, each time the gamma amount, body weight, drug amount, and solution amount are set. For example, five patterns are sequentially read from the latest pattern and displayed. When the desired set value is displayed, when the fingertip is released from both the display ON / OFF switch 44 and the item changeover switch 45, the currently displayed set value is determined. This simplifies the setting, especially when reusing the same patient. In addition, since gamma injection must be performed while ensuring accuracy, it was conventionally limited to a syringe pump type infusion pump,
As described above, the infusion tube is completely crushed only on the upstream side and the downstream side with each finger, and the middle part is not completely crushed. Thus, gamma injection by a peristaltic infusion pump became possible.

When a free flow is detected when an infusion probe is used, an alarm is issued, and at the same time, the cam is returned to the home position, and both the first and fourth fingers press the tube. Even if the alarm cause is removed, if the start key or the fast-forward key is not pressed, the alarm display is continued. FIG. 27 is an external view showing a state in which the infusion pump 1 patient performs infusion.

In this figure, as shown in the figure, the infusion pump 1 has at least three or more, more preferably five casters, and a stand pole 310 fixed to an upright state from the center of a stand foot provided with five casters. It is fixed on a table 305 fixed at an intermediate position. A hook 311 formed at an end with a locking portion for locking the locking hole formed in the infusion bag 300 is provided on the stand pole 3.
It is fixed to be horizontal from the upper end of 10,
As shown in the figure, the infusion bag 300 can be detachably fixed. It should be noted that, other than the mobile infusion stand, a configuration in which the infusion stand is fixed to the side of the bed may be used.

An infusion tube 2 to which an infusion tube 301 is connected in the middle of the infusion bag 300 is connected to the outlet of the infusion bag 300. The infusion tube 2 is set in the infusion pump 1 as described above, and the infusion tube 2 is further connected. Venous needle 304 connected via downstream clamp 303
Is inserted into the patient's vein as shown.

Further, the drip probe 302 of the drip set, which is detachably set on the outer peripheral portion of the transparent tube of the drip tube 301, is fixed as shown in the figure to enable more accurate infusion. With the use state as described above, the patient can move, and the post-operative recovery can be accelerated. It should be noted that the present invention includes any design change or the like within a range not departing from the gist of the present invention.

[0139]

As described above, according to the present invention, the display section of the infusion pump can be darkened during driving in which the sleep mode is set, and automatically displayed when an abnormal state occurs. It is possible to provide an infusion pump in which the brightness of the unit is set to a normal level, and which can be more reliably expressed by both an alarm sound and an alarm display when an abnormal condition occurs.

Specifically, the present invention provides an infusion pump in which the display is darkened by selecting and inputting the sleep mode, and the display is automatically turned to the normal brightness when an alarm such as bubble detection or tube blockage is detected. be able to.

[0141]

[Brief description of the drawings]

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 front view showing a state before the infusion tube 2 is loaded and a door base 4 opened.

FIG. 4 is a sectional view taken along line XX of FIG. 1;

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

FIG. 6 is an exploded perspective view of the infusion pump.

FIG. 7 is an external perspective view showing a finger assembly part of the pump mechanism 100.

FIG. 8A is a three-dimensional exploded view of the back plate mechanism 130. (B) is a cross-sectional view shown together with the pump base 101 described above.

FIG. 9 is a front view of the camshaft 102. FIG.

FIG. 10 is a diagram illustrating the operation of first to fifth fingers.

FIG. 11 shows a first finger 10-1 to a fifth finger 1
Camshaft 1 on the cam surface for reciprocating each of 0-5
02 (stroke) from the center of rotation, and 1
It is a figure showing rotation.

FIG. 12 is an external perspective view showing an attached 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.

FIG. 13A is a block diagram showing a configuration of the bubble sensor 60. (B) is a detection waveform diagram for explaining a conventional bubble detection principle.

FIG. 14 is a block diagram of an infusion pump.

FIG. 15 is a flowchart showing a use procedure.

FIG. 16 is a flowchart illustrating an operation of the bubble sensor.

FIG. 17 is a flowchart of blockage detection.

FIG. 18A is a flowchart illustrating an operation of storing the date of occurrence of impact force by the shock sensor 140. FIG. 6B is a flowchart illustrating an operation of storing the date of occurrence of impact force generation by the shock sensor 140 when the power switch is off.

FIG. 19 is a flowchart illustrating a standby function.

FIG. 20 is a correlation diagram between the flow rate and the flow rate accuracy.

FIG. 21 is a flowchart of motor driving.

FIG. 22 is a measurement result showing a temperature-dependent flow rate change of an infusion tube.

FIG. 23 is a control flowchart for driving a stepping motor in consideration of temperature correction.

FIG. 24 is a flowchart illustrating an operation of a backlight 58 provided in a display unit 8;

FIG. 25: Another embodiment of the infusion pump 1 (for gamma injection)
FIG.

FIG. 26A shows various setting values of gamma injection.
(B) is a flow rate calculation formula at the time of gamma injection.

FIG. 27 is a diagram showing a use state of the infusion pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Infusion pump 2 Infusion tube 3 Body base 4 Door base 5 Handle 5a Tube holder 6 Indicator 7 Door lock lever 8 Display part 9 Key panel part 10-n finger 11 Power supply unit 12a Body makeup cover 12b Door makeup cover 13 Back board 14 Main Mounting board 15 Power switch 16 Battery lamp 17 AC / DC lamp 18 Stop / mute switch 19 Start switch 20 Start indicator lamp 21 Stop indicator lamp 22 Up / down switch 23 Accumulated amount remaining time display unit 24 Completion display unit 25 Drop number display unit of infusion set 26 Blockage abnormality display part 27 Door opening display part 28 Bubble abnormality display part 29 Battery abnormality display part 30 Blocking pressure setting display part 31 Flow rate lamp 32 Scheduled amount lamp 33 Planned flow rate display unit 34 Scheduled flow rate switch 3 Accumulated remaining time switch 36 Fast-forward switch 37 Flow rate abnormality display section 39 Fuse holder 40 Solution amount display section 41 Drug amount display section 42 Weight display section 43 Gamma amount display section 44 Display on / off switch 45 Item changeover switch 46 Release lever 47 Tube clamp section 48 External communication connector 49 AC power supply connector 50 History switch 51 DC connector 52 Nurse call connector 53 Infusion probe connection connector 54 Infusion set switch 55 Display brightness switch 56 Drip-proof cap 58 Backlight 59 Hook 60 Bubble sensor 61 Upstream blockage sensor 62 Downstream Occlusion sensor 63 Flexible cable 64 Door light 65 Hinge block 66 Door seal rubber 67 Tube holding plate 68 Upstream closing holding plate 69 Downstream closing holding plate 70 Bー 90 Door sensor 95 Temperature sensor 100 Pump mechanism 101 Pump base 102 Cam shaft 103 Bearing block 104 Synchronous pulley 105 Synchronous belt 106 Stepping motor 107 Synchronous pulley 108 Rotation detection sensor 109 Bracket 110 Screw 111 Upper plate 112 Rear plate 113 Lower plate 115 Hinge pin 116 Battery unit 117 Bracket 118 Protective plate 119 Pin 120 Small bearing 121 Compression coil spring 122 Retaining ring 130 Back plate mechanism 131 Back plate member 132 Back plate base 135 Small compression coil spring 136 Large compression coil spring 137 Color 140 Shock sensor (sensitivity main axis direction) ) 142 transmission circuit 143 transmission side oscillator 144 upstream reception Moving element 145 Downstream receiving oscillator 146 Receiving circuit 147 Signal switching circuit 150 Detected waveform 200 Control unit 300 Infusion bag 301 Infusion tube 302 Infusion probe 303 Cleanme 304 Vein puncture needle 305 Placement table 307 Fixed screw hole member 308 Back cover 309 Rubber foot 310 Stand Pole 311 hook

Claims (2)

[Claims] 1. An infusion pump for performing continuous infusion over a long period of time, comprising: an abnormality detecting means for detecting an abnormal state during the continuous infusion; and an alarm sound or an alarm connected to the abnormality detecting means for detecting an abnormal state due to the detection. Display means for informing by either or both of the displays, setting means having a display part for performing various settings for the continuous infusion, lighting means for illuminating the display part, and brightness of the lighting means A sleep mode setting means for making the darker than normal, comprising: a control means connected to the abnormality detection means, the display means, the setting means, the illumination means and the sleep mode setting means, After the start, when the abnormal state is detected, the brightness of the illumination means is increased. 2. The infusion pump is of a peristaltic type that performs infusion by pressing an infusion tube from an outer peripheral surface, and the abnormality detecting means detects an air bubble mixed in the infusion tube, 2. A blockage detecting section for detecting a blockage abnormality of the infusion tube.
The infusion pump according to 1.