JP2001245974A - Syringe pump and obstruction pressure detecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a syringe pump capable of selecting an obstruction pressure optionally in various syringes each matching with syringe capacity (syringe diameter) and syringe maker, or a syringe storing a predetermined medicine previously and to provide its obstruction pressure detecting method. SOLUTION: The syringe pump and its obstruction pressure detecting method is composed of a storage means forming a table of data including a syringe cross sectional area, a syringe sliding resistance, a syringe outside diameter, and an upper limit value of a syringe obstruction pressure for every syringe maker and syringe capacity of one or more syringes, a judging means specifying a set syringe on the basis of the detected syringe outside diameter and a set inputted syringe maker name, a deciding means deciding an obstruction pressure threshold value on the basis of information selected from the specified syringe and the obstruction pressure upper limit value, a comparing means comparing the detected syringe obstruction pressure with the threshold value, and an alarming means issuing an alarm on the basis of the result from the comparing means.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe pump capable of arbitrarily selecting an obstruction pressure for a syringe volume (syringe diameter), various syringes corresponding to a syringe maker, or a syringe containing a predetermined drug in advance. And a method for detecting the closing pressure.

[0002]

2. Description of the Related Art A syringe pump which detects and monitors a force acting on a slider of a syringe pump, compares a closing pressure generated in the syringe with a threshold value which is selected and set, generates an alarm, and stops driving. Has been proposed.
(Japanese Patent No. 2785114). In view of the above circumstances, the present invention sets various upper limit values of the occlusion pressure for various types of syringes, and also sets a lower limit value of the occlusion pressure as necessary, and easily detects and monitors this. It is an object of the present invention to provide a syringe pump and a method for detecting an obstruction pressure thereof.

[0003] However, there is a problem that it is extremely difficult to set various upper limit values (threshold values) of the occlusion pressure for various types of syringes and detect them.

In view of the above circumstances, the present invention sets an upper limit value of various occlusion pressures for various types of syringes, and also sets a lower limit value of the occlusion pressure as needed, thereby easily detecting and detecting this. It is an object of the present invention to provide a syringe pump that can be monitored and a method of detecting an obstruction pressure thereof.

[0005]

To achieve the above object, a syringe pump according to the present invention comprises a syringe diameter detecting means for detecting a capacity of a syringe, a maker setting means for setting and inputting a syringe maker, and an injection pattern. And storage means for tabulating and storing data including syringe cross-sectional area, syringe sliding resistance, syringe outer diameter, and upper limit of syringe closing pressure for each of one or more syringe makers and syringe capacities. Determining means for specifying the set syringe based on the detected syringe outer diameter and the input and set syringe name, and the closing pressure based on the information selected from the specified syringe and the closing pressure upper limit value. Determining means for determining the threshold value of, and comparing means for comparing the detected syringe closing pressure with the threshold value, based on the result of the comparing means, And an alarm generating means for generating an alarm.

[0006] Also, attached to the set syringe,
Syringe manufacturer, reading means for reading identification information that specifies the type of syringe including syringe capacity, and one or more syringes containing data including the syringe cross-sectional area, syringe sliding resistance, syringe outer diameter, and the upper limit of syringe closing pressure Storage means for tabulating and storing each maker and syringe capacity; determining means for specifying the set syringe based on the detected syringe outer diameter and the input and set syringe maker name; and the specified syringe and blockage Determining means for determining a threshold value of the occlusion pressure based on information selected from the pressure upper limit value, comparing means for comparing the detected syringe occlusion pressure with the threshold value, and alarm generation for generating an alarm based on the result of the comparison means Means.

[0007] Also, attached to the set syringe,
Reading means for reading identification information for specifying the type of syringe including the syringe manufacturer, syringe volume, and drug name;
A storage means for storing data including a syringe cross-sectional area, a syringe sliding resistance, a syringe outer diameter, and an upper limit value of a syringe closing pressure in a table for each of one or more syringe makers and syringe volumes, and a detected syringe outer diameter. Based on the input and set syringe manufacturer name, determining means to specify the set syringe, determining means to determine the threshold of the occlusion pressure based on the information selected from the specified syringe and the occlusion pressure upper limit, Comparing means for comparing the detected syringe closing pressure with a threshold value, and alarm generating means for generating an alarm based on the result of the comparing means.

According to the method of detecting occlusion pressure of the present invention, a step of detecting the volume of a syringe, a step of setting and inputting a maker of the syringe, a step of inputting an injection pattern of a medicine, and setting and inputting the detected syringe volume are performed. Identifying the set syringe based on the syringe manufacturer name, and the data including the upper limit of the syringe cross-sectional area, syringe sliding resistance, syringe outer diameter, and syringe closing pressure. Data stored in the form of a table for each, a step of determining a threshold value of the occlusion pressure upper limit value based on the specified syringe, a step of comparing the detected syringe occlusion pressure with the threshold value, Generating an alarm.

[0009] Also, attached to the set syringe,
Reading the identification information that specifies the type of syringe including syringe manufacturer and syringe capacity; inputting the injection pattern of the drug; upper limit of syringe cross-sectional area, syringe sliding resistance, syringe outer diameter, and syringe closing pressure One or more syringe manufacturers, data including the value, stored data tabulated for each syringe volume, the step of determining a threshold of the occlusion pressure upper limit based on the specified syringe,

The method comprises the steps of comparing the detected syringe closing pressure with a threshold value, and generating an alarm based on the result of the comparing means.

[0011] Also, attached to the set syringe,
Reading identification information identifying the type of syringe, including syringe manufacturer, syringe volume, and drug name;
The step of inputting the injection pattern of the medicine and the data including the syringe cross-sectional area, the syringe sliding resistance, the syringe outer diameter, and the upper limit of the syringe closing pressure were stored in a table for each of one or more syringe manufacturers and syringe volumes and stored. The method comprises the steps of: determining a threshold value of an occlusion pressure upper limit value based on data and a specified syringe; comparing the detected syringe occlusion pressure with a threshold value; and generating an alarm based on a result of the comparing means. .

The closing pressure has at least two or more regions. The closing pressure is determined by comparing with a threshold based on a moving average value in a predetermined sampling cycle. The closing pressure further includes a closing pressure lower limit, and the lower limit is stored in a table for each of one or more syringe manufacturers and syringe volumes.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Figure 1 shows a syringe pump 1
FIG. 3 is a perspective view of the external appearance of FIG. 1, showing the setting dial 6 normally operated with the right hand, with the operation panel unit 2f facing forward.

In this figure, this syringe pump 1
An operation panel unit 2f for performing a microcontinuous infusion pump for the purpose of nutrition supply, blood transfusion, infusion of a drug such as a chemotherapeutic agent, an anesthetic, etc. in an ICU, a CCU, and a NICU. As described above, it is provided so as to be substantially concentrated on the upper surface, thereby improving operability.

The operation panel 2f is basically covered with an embossed sheet cover, and has a drip-proof design that satisfies the JIS0920 drip-proof test. For example, it easily wipes carelessly spilled chemicals and the like. And has high drip-proof properties to prevent chemicals and the like from entering the inside.

For this purpose, the upper cover 2 and the lower cover 3 are integrally formed from a molded resin material having chemical resistance, and a rubber seal 4 made of, for example, a silicone elastomer is interposed on the connecting surfaces of the covers 2 and 3. By adopting a configuration in which screwing is performed after that, foreign matter such as liquid is prevented from entering the inside.

Further, in order to emphasize the high precision of injection and the improvement of operability, precise injection operation control by microcomputer control can be realized, and an operation indicator 7 protruding upward at a position easy to see from the outside. The LED lights and blinks in multiple colors of red or green, and is displayed in a rotating state, so that the operating state and the alarm state can be monitored from a distance, thus ensuring safety. It also has a built-in buzzer and various safety functions for safety.

Further, since it is small and lightweight, it is designed to be easy to carry and to be used conveniently even when a plurality of units are used at the same time. Furthermore, by turning the setting dial 6 on the right side of the device, it is possible to set a numerical value according to the rotation speed and the rotation direction in a short time,
The set value can be displayed on the display unit 11 of the display panel, and when the setting of the numerical value such as the flow rate is changed, the setting dial 6 can be easily operated with one action by operating the setting dial 6.

Further, it has a shape that can be used multiple times (combined use) and a design that is easy to use and can be further built up. The shape and dimensions are, for example, height H: 110 mm × width W: 322 mm × depth D: 115 mm. Small and
The weight is about 1.8 kg, and the power source is an AC commercial power source, a built-in battery, and DC12VA.

The built-in battery has a charging time of 15 hours (hours), and is provided with a lid at the bottom of the lower cover 3 so as to be easily replaceable from the outside, is connected to a connector, and is detachably provided. . In addition, while the replacement life is three years or more, the charge control is trickle charge. In addition, overdischarge and charge prevention are realized by detecting the cell breakage of the rechargeable battery and taking measures to prevent cell breakage. Then, a heat-resistant (Ni-Cd) battery is used, and a new battery can be operated for 180 minutes or more until an alarm is generated and for 210 minutes or more before a shutdown.

A display unit 10 for injecting medicines per body weight, such as μg / kg / min, mg / kg / h, etc., and a display unit 11 for each of a flow rate, a planned amount, and an integrated amount, etc. are provided on the operation panel 2f. On the other hand, the setting dial 6 is provided with a concave portion 6e so that the setting dial 6 can be easily removed for cleaning. Is configured.

Next, in order to set a syringe body (not shown), the upper cover 2 has a slit portion on which a syringe stage 2a and a flange portion (not shown) formed integrally with the syringe body are set. While 2c is integrally injection-molded, a clamp column 2b (shown by a broken line) for rotatably supporting the clamp 5 is also integrally formed.

The slider assembly 50 driven in the direction of arrow A4 in the drawing reciprocates on the concave portion 2d of the case, while a pipe shaft and an inner clutch shaft described later with respect to a slider feed mechanism shown by a broken line. Are connected and fixed at the end of the slider assembly 50, and the pusher (not shown) of the syringe can be easily attached or detached by manually operating the clutch lever 52 of the slider assembly 50.

FIG. 2 is a plan view of the operation panel section 2f. In the figure, a power switch 15, an AC / DC lamp 16, and a battery lamp 17 are centrally arranged at the left end. Next to these lamps, a medicine injection display unit 10 per body weight is provided. However, some models without this medicine injection display unit 10 per body weight can be sufficiently used, and there are some models that do not. The display unit 10 is provided with a display on / off switch 10a and an item changeover switch 10b.

On the other hand, a clamp 5 is provided on the display 10.
When the setting is performed by using, the amount of vertical movement of the clamp is converted into an electric signal and then automatically measured by the syringe diameter detecting means 50 for detecting the syringe outer diameter (capacity), and the capacity of the set syringe is measured. (Volume) 10cc (ml), 2
0cc (ml), 30cc (ml), 50cc (ml)
Is displayed.

An operation indicator 7 is provided below the clamp 5 so as to project upward from a transparent acrylic resin or the like, so that the built-in operation indicator 7 emits red and green light appropriately. Light emitting diodes 7a to 7d
Is turned on or off, or the light is scattered inside so as to rotate in the direction of the arrow shown in the drawing, so that the injection operation state can be displayed by lightning.

Adjacent to the clamp 5, there are provided display lamps 19a, 19b and 19c for switching and displaying the set detection pressure by the blockage detection mechanism provided in the syringe pump in three stages. Adjacent to these lamps are a remaining amount alarm lamp 20, a battery alarm lamp 22, and others.

Next to these lamps, the flow rate, the planned volume,
A seven-segment LED display unit 11 having integrated amount lamps 23, 24, and 25 is provided. This display unit 11
The maker name set and input by the maker input means 40 or the maker name read by the identification information reading means 62 (described later) is displayed by symbols or characters.

On the right side of the display section 11, a display changeover switch 26 and an integration clear switch 27 are provided. A fast-forward switch 30 is provided below the display unit 11.
, A start switch 29 and a stop / mute switch 28 are provided. Further, a selection means (selection switch) 61 for selecting one or both of the remaining position alarm and the remaining time (end time) alarm is also provided.

Subsequently, the flange of the syringe is slit 2
Insert the flange of the syringe into the slit 2c to set it at c. Thereafter, the syringe main body S is set on the syringe stage 2a, and then the syringe is clamped by the clamp.

The above-mentioned slit 2c and syringe stage 2
Further, a small-diameter circular arc groove portion is formed integrally with a so that a small-capacity small-diameter syringe can be held in a stationary state. Thus, the setting of the syringe is completed.
At this time, it is attached to the syringe, the manufacturer of the syringe,
Identification information that identifies the type of syringe, including syringe volume
A reading means for reading (a barcode or the like) can be provided to specify the syringe.

Subsequently, the clutch is released and the slider is moved. At this time, the slider assembly 50 shown in FIG.
By pressing the clutch lever 52, the slider can be moved by hand. Then, when the pusher (not shown) of the syringe is brought into contact with the slider assembly 50 and the clutch lever 52 is released, the left and right hooks (not shown) 53, 5
4 automatically holds the pusher SP of the syringe S. That is, when the clutch lever 52 is released, the hook of the slider is in a state of pinching the pusher of the syringe. The above is the basic set operation.

The slider feed mechanism is further provided with a blockage detection mechanism. Syringe presser (not shown)
Is pressed to inject the medicinal solution contained therein, but at this time, a force acting in the opposite direction is generated by the action of the resistance in the syringe and other infusion channels.

The force thus generated becomes a deflection of a pressure sensor (not shown) using a strain gauge or the like, and this mechanical deflection is converted into an electrical output to obtain a set value (E ^2). (Stored in the PROM) is displayed on the operation indicator 7 as an alarm to notify an abnormal state, and an alarm sound (buzzer) is generated (sounds).

The load setting resulting from the resistance in the syringe and other infusion channels is performed by the three display lamps 19a and 19 provided on the display panel on the upper cover 2.
The display is switched between three stages by b and 19c, and the load set values are as follows. (1) H (high); (800 ± 200 mmHg) (2) M (medium); (500 ± 100 mmHg) (3) L (small); (300 ± 100 mmHg) This load set value is the syringe outer diameter D ( cm), syringe size (syringe volume) (ml), syringe cross-sectional area A (cm ² ), syringe sliding resistance Fs (kgf), etc. kgf / cm ² ) is stored in the storage means (memory) 91.

A threshold value P (kgf / cm ² ) selected from one tabled, set, and specified syringe is selected.
Conversion value Fp (kgf) [= P (kgf / cm ² ) La A (cm ² )-Fs (kg
f)] and a pressure value (load F (kgf)) detected by the above-described pressure sensor (not shown) via the slider.
Incidentally, this load F (kgf) is preferably a predetermined sampling period, for example, by sampling a predetermined number, for example, 16 every 0.05 seconds, to obtain a moving average value, syringe,
It is obtained by removing a noise component due to backlash of the driving unit. The obtained result is displayed in the segment display section 19d.
A segment is displayed, and an alarm (alarm) indicating that blockage has occurred at a predetermined threshold or more is generated, and is displayed by blinking or the like.

On the other hand, the remaining amount detection / remaining position mechanism is an important function when the remaining amount decreases during the operation, and the pump is continuously moved to move and the pusher of the syringe is moved. When it reaches an arbitrary position, it comes into contact with the lever of the potentiometer.

When the movement is further continued from the contact state, the value of the potentiometer reaches a predetermined value stored in advance (an advance warning position, which will be described in detail later). At this time, an alarm indicating that the scheduled injection is completed after a predetermined time (hour and minute) is displayed on the remaining amount alarm lamp 21 and the remaining time / remaining time display unit 12 displays the remaining time.
(Minutes) or remaining amount (ml) or the remaining time (minutes) or remaining amount (ml) are displayed alternately to generate an alarm sound.
Display.

As described above, when the operation of injecting the chemical liquid by the pump is completed, the pump moves in the direction opposite to the feed direction, the slider is returned to the initial position, and the lever of the potentiometer is connected to the lever. It is configured to return to the initial position by the force of the tension spring.

Further, the syringe pusher / clutch disengagement detecting mechanism is configured such that the clutch lever 52 is erroneously gripped during the feed operation of the pump, and the teeth of the half nut (not shown) and the lead screw (not shown) constituting the clutch are provided. An alarm sound is generated when the combined state is cut off or the same occurs due to the action of some load or the like, and an abnormality is notified by blinking of the indicator 19e or the like.

Next, data of the syringe cross-sectional area A (cm ² ), the push-off end position LE (cm), and the syringe outer diameter D (cm) are stored in the CPU for each of one or more syringe makers and sizes (ml). The syringe cross-sectional area data is stored and held in an exchangeable memory (E ² PROM). In addition, a drug injection (gamma) injection per body weight, a predetermined amount injection, an alarm / drive state display are provided, and the alarm is a three-dimensional display, and the LED lighting portion is rotated in the drive state. .

The remaining battery level is displayed on the battery lamp 17 in three stages. Conventionally, the detection of the remaining battery level is performed based on the battery voltage. However, the present apparatus detects the remaining battery level with higher accuracy by integrating the current.

When the setting dial 6 is rotated clockwise, various setting values are increased, and the setting is displayed on the display unit 11 shown in FIGS. Similarly, when the setting dial 6 is rotated counterclockwise, the setting value is displayed on the display unit 11 so as to decrease.

Specifically, when the display changeover switch 26 provided on the display panel of FIG. 2 is pressed, the flow lamp 23, the planned amount lamp 24 and the integrated amount lamp 25 are sequentially turned on, and each setting is performed. You can do it.

Therefore, when setting the flow rate, the display changeover switch 26 is pressed to turn on the flow rate lamp 23, and then the setting dial 6 is rotated. As a result, the set value is displayed on the display unit 11. This display range is from 0.0 to 1200 ml
/ H (~ 999.9: 0.1 ml / h step) (10
00: 1 ml / h step), and the minimum flow rate is set to 0.0, and a wide injection range can be set. In addition, guarantees can be made for each type of syringe from each manufacturer. Also, when the flow rate set value is “0”, the buzzer issues a one-shot notification so that it cannot be started. Further, even when the set flow rate value exceeds the flow rate range in which the drive can be performed, the buzzer does not issue a one-shot notification to start.

In order to set the amount of accumulation, the display changeover switch 26 is pressed to turn on the accumulation lamp 25, and then the setting dial 6 is turned while looking at the display section 11 shown in FIG. Rotate and set. The display range of the integrated amount at this time is 0.0 to 999.9 ml (0.1
ml step), and the minimum integration amount is 0.0. The integration is performed from the pulse count value of the encoder fixed to the output shaft of the motor 35, while the fast-forward switch 30 is pressed and then fast-forwarded. The fast-forward amount is added.

The injection amount is set at a weight of 0.0 to 30.
0.0 Kg (0.1 Kg step), drug amount; 0.0
~ 999.9 mg (0.1 mg steps), solution volume;
0.0 to 999.9 ml (0.1 ml step), dose: 0.00 to 99.99 (μg / kg / min or mg / kg / h) (0.01 step) .

The minimum flow rate is displayed from 0.0, and when a body weight, a drug amount, a solution amount, and a dosage amount are input, the flow rate is automatically calculated and displayed, and starts at the displayed flow rate. I can do it. This calculation result indicates the settable flow rate (0.1 ml / h or more, 1200 ml
/ H or less), the flow rate display on the display unit 11 becomes a non-numerical "----" display. Operation cannot be started.

On the other hand, when the calculation result is within 1200 ml / h, the calculation result is displayed, but the calculation result is 300.1 ml / h or more, and the type of the syringe is 10 to 30.
When it is automatically detected that the value is cc, the buzzer issues a one-shot notification so that it cannot be started even if the start switch 29 is pressed.

Next, when the fast-forward switch 30 is pressed, the flow rate of the liquid is increased, and when the syringe is 50 cc, the flow rate is increased by one.
200ml / h, 500ml / h for 30cc,
400ml / h for 20cc, 10cc syringe
In this case, the liquid is sent at 300 ml / h.

The display range for setting the scheduled amount is 0.0 to 9
99.9 ml (0.1 ml steps), minimum planned volume →
0.0, and the operation can be selected by an internal selection switch. And the scheduled amount = 0.0
In this case, when the start switch 29 is pressed, the buzzer issues a one-shot notification and the scheduled amount lamp 24 of the scheduled amount LED blinks so that the start cannot be started.

In the case of the scheduled amount <= integrated amount, the LED of the scheduled amount lamp 24 flashes and a buzzer is sounded so that the operation cannot be continued. Also, when the scheduled amount <= integrated amount during injection, the LED of the scheduled amount lamp 24 flashes, a buzzer is sounded, and the operation automatically switches to the KVO operation.
At this time, since the flow rate is displayed as KVO (0.1 ml / h), the sound is muted when the stop / mute switch 28 is pressed once. There is a re-alarm during the continuation of the KVO operation, and the operation stops when the stop switch 28 is pressed again.

On the other hand, the initial display when the power of the apparatus is turned on is "0" ml except in the memory mode.

The priority order of the sounds is basically (a) occurrence of blockage, disengaged syringe, disengaged clutch,
(B) Battery voltage drop (2 minutes, 4 minutes, 6 minutes, 8 minutes,
(10 minutes or more), (c) push-off notice warning (remaining amount notice warning), (d) prioritized sound is set to be higher in order of the forgotten start sound. When multiple alarms are generated, the alarms are sequentially switched to higher ones. Similarly, when multiple alarms occur during silencing, a high-priority alarm is issued, and key clicks and one-shot alarms are issued during intermittent occurrences such as a forgotten sound. Is designed to interrupt and ring.

On the other hand, referring again to FIG. 2, the operation of the operation indicator 7 is as follows: (a) During normal operation, the built-in light emitting diode 7a is operated at four different speeds corresponding to the set flow rate.
7d blinks green sequentially in the clockwise direction. (B) While the operation is stopped, the green light turns off except for the red lighting at the time of an alarm. (C) When the start is forgotten, all of the light emitting diodes 7a to 7a to
7d flashes red. (D) When an external communication is received, it blinks green for a moment.

The above description of the use of the syringe pump is given in the first section.
This embodiment will be described with reference to the flowchart of FIG. 3 and the block diagram of FIG. As a preparation, first check the tools, and check the syringe pump 1 and the attached pole clamp and A
C Check that the power cable, the infusion stand P, the syringe containing the drug solution, and the indwelling needle are all in place. Thereafter, the pole clamp is fixed to the infusion stand P, and the pole clamp is firmly fixed to the infusion stand. For this purpose, the fixing screw of the pole clamp is inserted into the screw hole at the bottom of the syringe pump and fixed. Next, connect the AC power cable to the AC inlet 8 on the right side of the main body,
Connect the plug to a 100 VAC outlet with a ground terminal.

When the AC power supply is connected, the battery lamp 17 is turned on to indicate that the built-in battery is being charged.

Then, when the power is turned on by pressing the power switch 15 for about one second to turn on the power, all the lamps are turned off.
The self-check is performed automatically by flashing twice and by the buzzer (step S1). At this time, while the AC / DC lamp 16 is turned on, the display lamps 23, 24, and 25 for the flow rate, the planned amount, and the integrated amount are turned on. In addition, a preset syringe maker is displayed on the display unit 11 of the flow rate / planned amount / integrated amount by a numeral for about 3 seconds. It is always checked whether or not the set syringe matches the set manufacturer name (step S2).

If the syringe maker is not appropriate, a maker name is set and input in the maker name input section (input means) 40 (step S3). The manufacturer name that has been set and input is displayed on the display unit 11 as characters or symbols.

After a lapse of a predetermined time, the number of the syringe maker on the display unit 11 for the flow rate / planned amount / integrated amount disappears, and “0.0” is displayed on the display unit 11. At this time, the operation indicator 7 is turned off.

On the other hand, the display lamp 18 of the type of the syringe prompts the user to set the syringe by displaying that no syringe (not shown) is mounted in a state where all four built-in display lamps are blinking. Syringe setting is performed when all the above indications can be confirmed.

When the syringe is connected to the injection line (tube) and the syringe filled with the chemical solution under an aseptic environment, the main body of the syringe is set on the stage 2 a and engaged with the clamp 5.

Subsequently, a syringe flange (not shown) is set in the slit 2c in order to set the syringe flange in the slit 2c. Then the syringe body S
Is set on the syringe stage 2a, and then the clamp 5 is rotated in a predetermined direction, the locked state is released, the syringe is clamped, and the set syringe diameter detecting means (detection unit) 50 sets the syringe diameter (syringe). Is detected (step S4).

Subsequently, the clutch lever of the slider assembly is pushed to release the clutch and move the slider. At this time, when the clutch lever of the slider is pushed, the slider can be moved by hand.

When the clutch lever is released after the pusher of the syringe comes into contact with the slider assembly, the right and left hooks automatically hold the pusher.
That is, when the clutch lever is released, the hook of the slider is in a state of pinching the pusher of the syringe.

After the syringe is set, priming is performed. This priming must be performed before puncturing the patient. When the fast-forward switch 30 is pressed, the operation indicator 7 is rotated and displayed, the pump operation is disclosed, and the liquid medicine flows out from the tip of the indwelling needle. When the fast-forward switch 30 is kept pressed to send the chemical solution to the tip of the indwelling needle, the integrated amount lamp 25 blinks.

Further, a display section 11 for the flow rate / planned quantity / integrated quantity
During fast-forwarding, the integrated amount lamp 25 flashes, and the priming amount is displayed on the display unit 11 for the flow rate, the planned amount, and the integrated amount. This priming amount is added to the integrated amount in 0.1 ml steps. Here, by pressing the integration clear switch 27, the integration amount can be cleared to "0".

This priming is always performed because it is important to eliminate the gap between the syringe and the main body so that the working surface of the slider assembly 50 of the main body comes into contact with the presser of the syringe without any gap.

After the above priming is completed, an injection pattern (injection amount) is set by the setting input means (input section) 60. At this time, it is first confirmed that the flow lamp 23 is lit. When the flow lamp 23 is not lit, the display changeover switch 26 is pressed, and the flow lamp 2 is turned on.
3 is turned on.

Thereafter, the flow rate per hour is set by turning the setting dial 6 which constitutes a part of the input section 60. At this time, in order to prevent malfunction of the setting dial operation and to ensure safety, the turning is performed. The value does not change during the first half lap. In addition, if it exceeds half a lap, a buzzer sounds and the numerical value changes.

The numerical value is increased or decreased by turning the setting dial 6 forward, and increasing by turning the setting dial 6 backward. When the setting dial 6 is turned while the stop / mute switch 28 is pressed, the numerical value changes rapidly in the upper digit.

As for the syringe type and the maximum flow rate, the maximum flow rate that can be set is set according to the type of the syringe. For example, the maximum flow rate is 300 ml for a 30 ml syringe. Therefore, when a value larger than the maximum flow rate is set and the start switch 29 is pressed, the flow rate set value flashes and the injection is not started, so the setting is completed again and the setting is completed ( Step S5).

The setting of the blockage detection pressure level and the setting of the buzzer volume are performed by pressing the stop / mute switch 28 and the display changeover switch 26. First, to change the setting of the blockage detection pressure level, when the display changeover switch 26 is simultaneously pressed while pressing the stop / mute switch 28, "P ***" is displayed on the display section 11 for the flow rate, the planned amount, and the integrated amount. , And enters the setting mode. When the display changeover switch 26 is released and pressed while the stop / mute switch 28 is pressed as it is, the print characters “L” (low) and “M” (medium) near the closing pressure setting value lamps 19 a, 19 b, and 19 c are displayed. ) ・ "H" (high) lights in order, so select the desired blockage pressure level, release your finger from all the switches, press the stop / mute switch 28, and press the integration clear switch 27 to detect blockage. A pressure level selection setting input is performed (step S6). The above ***
Is a numerical value corresponding to the above L, M, H. Thus, the stop / mute switch 28, the display changeover switch 26, and the integration clear switch 27 function as closing pressure selecting means.

Based on the input and selected occlusion pressure level, the syringe diameter (capacity) and the name of the syringe maker, the occlusion pressure threshold (upper and / or lower limit) tabulated in advance is prepared.
Is automatically selected, and the injection of the medicine is started (step S7).

A predetermined sampling period (for example, a predetermined number (16) is continuously sampled every 0.05 seconds, a moving average value is calculated, and it is determined whether or not the occlusion pressure exceeds a threshold value (step S8). .

If the closing pressure exceeds the threshold, an alarm is generated and the operation indicator 7 is lit in red.
(Flashes) and informs (step S10). The user confirms and resets if there is no problem (step S11).

If the closing pressure does not exceed the threshold, the injection is continued (step S9). Remaining / remaining time selection switch
Based on the data selected and input by the (selection means), the warning notice position LNE (cm) is calculated in the control unit (CPU) 90 as follows (step S12).

<When the remaining amount is set> The remaining amount VNE to be set
(Ml), the alarm position LNE (cm)
Is defined as the push-off position LE (cm) and the syringe cross-sectional area A (cm ² ) based on the above-mentioned tabulated storage data, and the push-off position LNE (cm) = LE (cm) + VNE (ml) / A (c
m ² ) is calculated. <When the remaining time is set> When the remaining amount VNE (ml) to be set is set, the alarm position LNE (cm) is set based on the above-mentioned tabulated storage data, the injection speed R (mL / h),
As the remaining time T (h) and the syringe cross-sectional area A (cm ² ), the push-off position LNE (cm) = LE (cm) + R (mL / h) x T (h) /
A (cm ² ) is calculated.

As described above, the comparison of the advance warning position of the pusher is performed (step S12). When the pusher reaches the advance warning position, an alarm (alarm) is generated and the operation indicator 7 is activated.
Turns yellow (turns on and off) (step S13), and the injection is terminated after a predetermined time (step S14). I do.

It should be noted that even after about 2 minutes have passed since the setting of the flow rate after the syringe was set in the main body 1,
If the infusion is not started, a buzzer sounds to signal that it has been forgotten to start. Therefore, when the stop / mute switch 28 is pressed, the buzzer sounds and stops. When the injection pattern (flow rate) is changed during injection, the injection is temporarily stopped to stop the injection, and the setting input means 60 including the setting dial 6 is reset. At this time, when the stop / mute switch 28 is pressed, the operation indicator 7 is turned off.

When the predetermined amount of the drug solution has been injected, the stop state is confirmed and the syringe is removed. For this purpose, the clamp 5 is pulled up and turned by about 90 degrees and held. Then, the clutch lever 5 of the slider 50
2 and press the left and right hook members 53 and 54 to open the syringe. Thereafter, when the power switch 15 is not used again, the power switch 15 is kept pressed for about 2 seconds or more to be turned off.

FIG. 4 shows a case where the commodity information affixed to the syringe is automatically read by the reading means 62.
5 and a block diagram of FIG. Therefore, when the power switch 15 is turned on by pressing the power switch 15 for about one second to turn on the power, all the lamps flash three times and the buzzer sounds, and a self-check is automatically performed (step S21). At this time, AC / DC lamp 1
While 6 is turned on, the display lamps 23, 24, and 25 for the flow rate, the planned amount, and the integrated amount are turned on. In addition,
A preset syringe maker is displayed on the integrated amount display section 11 by a numeral for about 3 seconds. The product information (barcode) of the set syringe is read by the product information reading means 62.
The type of the syringe is specified by automatically reading (step S22). It is always checked whether or not it matches the set manufacturer name (step S23).

If the syringe maker is different from the one set, the maker name is set and input by the maker name input section (input means) 40 (step S24). If the same syringe maker is set, the next injection pattern is set (step S25). The manufacturer name that has been set and input is displayed on the display unit 11 as characters or symbols.

When an injection pattern is set and inputted, an occlusion pressure threshold value is set (step S6). Since the subsequent use method is the same as that in the flowchart of FIG. 3, the description is omitted.

Here, the injection per body weight will be described. First, when the display ON / OFF switch 10a is kept pressed for about 2 seconds or more, the injection setting display section 10 is turned on, and injection per body weight (gamma injection) is enabled. Subsequently, when the item changeover switch 10b is pressed, the display screen of the injection setting display section 10 changes, and every time the item changeover switch 10b is pressed, the injection speed per body weight (injection amount), body weight, medicine amount, and solution amount blink. Is displayed. The portion where the display is blinking is an item whose setting can be changed. By turning the setting dial 6 while the desired item is displayed, the numerical value on the screen of the injection setting display section 10 is changed and the numerical value is changed. Set. By turning the setting dial 6 while pressing the stop / mute switch 28, each step value can be changed rapidly. The screen of the gamma injection setting display section 10 displays the flow rate (injection speed) according to the set injection amount per body weight, body weight, drug amount, and solvent amount.
Is automatically calculated and displayed.

As the setting of the special function, the setting of each mode can be changed as required by operating the changeover switch inside the main body. As these special functions, the planned amount of the display unit 11 for the flow rate / planned amount / integrated amount can be changed between the standard mode and the planned amount mode. In the standard mode, each time the display changeover switch 26 is pressed, the flow rate and the integrated amount are displayed in this order, and the set amount cannot be set.

When the mode is switched to the scheduled amount mode by operating the changeover switch inside the main body, the display on the display section 11 is arranged in the order of the flow rate, the scheduled amount, and the integrated amount, and the scheduled amount can be set. To set the predetermined amount, the display changeover switch 26 is pressed to turn on the predetermined amount lamp 24, and then the setting dial 6 is turned to set the predetermined amount. This setting can be changed in 0.1 ml steps. When the scheduled volume is set and injection is started,
When the integrated amount reaches the scheduled amount, the scheduled amount lamp 24 flashes and a buzzer sounds.

When the predetermined amount is set as described above, the KVO (keep vein open) function is continued at the flow rate (injection speed) of 0.1 ml / h for the injection of the chemical. If the user wants to check on the way, pressing the stop / mute switch 28 turns on the operation indicator 7 and stops the buzzer. At this time, the keep vane open function is continuing,
When the mute switch 28 is pressed again, the operation indicator 7 is turned off, the keep-vein open function is released, the operation is stopped, and the injection in the scheduled amount mode is completed.

The re-alarm can be switched between the standard mode and the mute mode. The operation indicator 7 flashes red and the buzzer sounds. If the alarm state is not released for more than 2 minutes after the buzzer is muted, the buzzer sounds again. It is possible to set a standard mode and a mute mode in which the alarm function does not operate even if the alarm state continues for 2 minutes or more.

The warning to forget to start can be changed to the standard mode and the mute mode. The operation indicator 7 flashes red and the buzzer sounds. Is sounded, and a mode for notifying that the user has forgotten to start and a mute mode can be set to a mode in which the forgetting to start alarm function does not operate even if the stopped state continues for 2 minutes or more.

The syringe maker can be changed by an internal changeover switch, but this special function cannot be normally set because careless care may cause an accident.

The setting of the blockage detection pressure level and the setting of the buzzer volume are performed by pressing the stop / mute switch 28 and the display changeover switch 26. First, to change the setting of the blockage detection pressure level, when the display changeover switch 26 is simultaneously pressed while pressing the stop / mute switch 28, "P ***" is displayed on the display section 11 for the flow rate, the planned amount, and the integrated amount. , And enters the setting mode. When the display changeover switch 26 is released and pressed while the stop / mute switch 28 is pressed as it is, the print characters "L", "M", and "H" in the vicinity of the closing pressure set value lamps 19a, 19b, and 19c are sequentially displayed. When the desired setting is obtained, the finger is released from all the switches, the stop / mute switch 28 is pressed, and the integration clear switch 27 is pressed, whereby the blockage detection pressure level can be set. The above *
** is a numerical value corresponding to the above L, M, H. In this way, the means for selecting and setting the occlusion pressure upper limit (lower limit),
The stop / mute switch 28 and the display changeover switch 26 fulfill the function.

To change the setting of the buzzer volume, simultaneously press the stop / mute switch 28 and simultaneously press the integration clear switch 27 to display the flow rate / scheduled amount / integrated amount on the display section 11.
“BEL * 2” is displayed and the setting mode is set. Release the integration clear switch 27 while pressing the stop / mute switch 28 as it is and press it to display “bEL:
1], “bEL: 2”, “bEL: 3” and the buzzer volume changes according to the loudness, medium, and low. When the desired volume is reached, release the finger from all the switches to set the buzzer volume. Do.

The power-concentrated box can be used with a DC power supply. In this case, the AC power cable is
Confirm that it is disconnected from the main body, and connect a DC cable to the DC connector 9 on the right side of the main body. Subsequently, when the power switch 15 is turned on, the AC / DC lamp 16 is turned on to supply DC power.

When neither the AC power nor the DC power is supplied, the internal battery is automatically switched to, the AC / DC lamp 16 is turned off, and the built-in battery can be used continuously for about three hours. The built-in battery is either AC power or D
It is charged when the C power supply is connected. During this charging, the battery lamp 17 is turned on to display the remaining amount of the battery at three levels. As a guide for the remaining battery power, when all three lamps are lit, the battery can be used for about 160 minutes or more. When two lamps are lit, the operating time is about 80 minutes or more. When only one is lit, it can be used for about 30 minutes or more. If all three are flashing, only two or one light up indicates that the battery has deteriorated.

When the remaining amount of the built-in battery further decreases, the battery alarm lamp 22 flashes and a buzzer sounds, so that the AC power supply is connected and the AC or D
Use by connecting to the power supply of C.

The noise margin is assumed to be, for example, in the case of using an electric scalpel in the vicinity, and the power supply impulse;
V, 500 nSec, radiation; 1 KV, 3 directions were satisfied. Furthermore, the portable telephone (5 W) is designed to withstand use even in the vicinity. The static electricity noise margin is 8KV for contact discharge and 15KV for air discharge so that malfunction does not occur.
rat. 18 and CISPR 11 (IEC 60601)
-1-2) and VEDIN 58771. Lightning protection type is CLASS * I (3KV or more)
TYPE CF (ground leakage; 0.5 mA or less) in Japan; JIS T1001, T1002 and overseas; IEC6
0601-1 was satisfied.

The chemical resistance was not wiped off with alcohol, but the outer layer was made to ABS grade V0 so as to have the chemical resistance of alcohol level, and the back side printing was performed so that the inscription plate, printed characters, display, etc. were not lost. And dealt with.

The driving thrust (the pressing force of the pusher) is about 15 Kg · f at the maximum and withstands about 20 Kg · f, and the machine (feed) accuracy can be made high accuracy within ± 1% by actual measurement. In addition, guarantees can be made for each type of syringe manufacturer.

Specifically, by actually measuring the amount of movement of the slider, (A) flow rate <1.0 ml / h 60 minutes (long-term); ± 5% or less (B) 1.0 ml / h ≦ flow rate < 5.0 ml / h 2 minute observation window; ± 2%
Or less and 60 minutes (long-term); ± 1% or less (C) 5.0 ml / h ≦ flow rate 2 minutes observation window; ± 1%
I did the following.

Further, in order to make the flow rate accuracy high within ± 3%, the discharge amount was measured so as to be able to guarantee each kind of each manufacturer. (A) 1.0 ml / h ≦ flow rate <5.0 ml / h 2 minute observation window; ± 5%
Below (B) 1.0 ml / h ≦ flow rate 60 minutes (long-term); ± 3% or less (C) It was confirmed that 95% or more was obtained 10 minutes after the start. The injection amount per weight display unit 10 is a liquid crystal with a backlight (yellow or green). It is a numerical display consisting of 7 segments each. Weight / Kg / Drug amount / m
g, solution volume, ml, dose, μg / kg / min or m
g / kg / h etc. can be displayed, body weight; 7 SEG 4 digits + 1 SEG decimal point, drug amount: 7 SEG 4 digits + 1 SE decimal point
G, solution volume; 7 SEG 4 digits + decimal point 1 SEG, dose;
Indicated by 7 SEG 4 digits + decimal point 1 SEG. When the normal injection mode is selected, the entire screen is turned off.

The flow rate / integrated quantity / scheduled quantity display section 11 is an easy-to-read LED display, and includes 4 digits of 7 SEG and 1 SE of decimal point.
When G and the γ mode is set, the display is automatically switched to the flow rate display. In addition, injection per body weight (μg / kg / mi
(n or mg / kg / h, etc.) During the mode setting, the flow rate display switches sequentially according to the set value. When displaying the integrated amount or the planned amount, the display automatically switches to the flow rate display when left for about 15 seconds. I have to.

The alarm is generated at the time of Er *, runaway of the CPU, switch operation, and self-check, but has an easy-to-understand tone and no uncomfortable feeling, and is compatible with overseas standards and can be switched in three levels of volume (panel operation). In addition, the storage of the set volume and the display of the volume level at the time of setting are enabled. The maximum volume is 65 dB or more 1 m away, and self-excited (to alert when CPU runs away)
I have to.

The timbre has three frequencies (approximately 2 to 4 KHz), and the CPU can output a PWM signal, and an alarm (→ PWM output, watchdog → hard oscillation). This volume switching procedure is as follows: (1) In the alarm state (except for voltage drop and remaining amount), switching is not possible and press accumulation clear. (2) Each time the switch is pressed while pressing the stop switch, the middle is increased. → small → medium →
(Changes to 1.5 seconds for the buzzer) (3) Synchronize with the buzzer, the flow rate is displayed on the flow rate display section at 7 Seg, medium = "b-2",
Large = "b-3" and small = "b-1". (4)
The result is written in the E ² PROM.

[0100]

As described above, according to the present invention,
Syringe pump (capable of detecting the occlusion pressure with high accuracy), which can select the occlusion pressure arbitrarily for various syringes corresponding to the syringe volume (syringe diameter), a syringe maker, or a syringe containing a predetermined drug in advance. A pressure detection method is obtained.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a syringe pump body of the present invention.

FIG. 2 is a plan view of an operation panel unit 2f.

FIG. 3 is a diagram showing a flowchart (first embodiment) of blockage detection.

FIG. 4 is a diagram showing a flowchart (second embodiment) of blockage detection.

FIG. 5 is a block diagram of the syringe pump of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Syringe pump main body, 2 ... Top cover, 3 ... Bottom cover, 4 ... Rubber seal, 5 ... Clamp, 6 ... Setting dial, 7 ... Operation indicator, 7a-7d ... Light emitting diode, 8 ... AC inlet, 9 ... DC Power connector, 10
... Infusion setting display unit per body weight, 11 ... Display unit of flow rate / planned amount / integrated amount, 12 ... External communication connector, 13 ... Nurse call connector, 15 ... Power switch, 16 ... AC / DC
Lamp, 17: Battery lamp, 18: Syringe display lamp, 19a to 19c: Closed lamp, 21: Remaining alarm lamp, 22: Battery alarm lamp, 23:
Flow rate lamp, 24: scheduled amount lamp, 25: integrated amount lamp, 26: changeover switch, 27: integrated clear switch, 28: stop / mute switch, 29: start switch,
30: fast-forward switch, 52: clutch lever

Claims (12)

[Claims] 1. A syringe pump for injecting a drug solution in a syringe according to a predetermined injection pattern, a syringe diameter detecting means for detecting a capacity of the syringe, a maker setting means for setting and inputting a maker of the syringe, Injection pattern input means for inputting an injection pattern, and data including the syringe cross-sectional area, the syringe sliding resistance, the syringe outer diameter, and the upper limit of the syringe closing pressure are tabulated and stored for each of one or more syringe makers and syringe volumes. Storage means, determining means for specifying the set syringe based on the detected syringe outer diameter and the input and set syringe name, and information based on the selected syringe and the information selected from the closing pressure upper limit value. Determining means for determining a threshold value of the occlusion pressure by using the pressure sensor, and comparing the detected syringe occlusion pressure with the threshold value. Based on stage and, as a result of the comparing means, a syringe pump, characterized in that comprising the alarm generating means for generating an alarm. 2. A syringe pump for injecting a medicinal solution in a syringe according to a predetermined injection pattern, wherein the syringe pump is attached to a set syringe and includes identification information for specifying a syringe maker and a syringe type including a syringe capacity. Reading means for reading, and storage means for tabulating and storing data including a syringe cross-sectional area, a syringe sliding resistance, a syringe outer diameter, and an upper limit of a syringe closing pressure for each of one or more syringe makers and syringe volumes. Determining means for specifying the set syringe based on the specified syringe outer diameter and the input and set syringe name; and setting the occlusion pressure threshold based on the selected syringe and information selected from the occlusion pressure upper limit. Determining means for determining; determining means for comparing the detected syringe closing pressure with the threshold; A syringe generating means for generating an alarm based on the result. 3. A syringe pump for injecting a drug solution in a syringe according to a predetermined injection pattern, wherein the syringe pump is attached to a set syringe and specifies the type of syringe including a syringe manufacturer, a syringe volume, and a drug name. Reading means for reading identification information; and storage means for storing data including a syringe cross-sectional area, a syringe sliding resistance, a syringe outer diameter, and an upper limit value of a syringe closing pressure in a table for each one or more syringe manufacturers and syringe volumes. Determining means for specifying the set syringe based on the detected syringe outer diameter and the input and set syringe manufacturer name; and the closing pressure based on information selected from the specified syringe and the closing pressure upper limit value. Determining means for determining a threshold value of; comparing means for comparing a detected syringe occlusion pressure with the threshold value; A syringe generating means for generating an alarm based on a result of the means. 4. The syringe pump according to claim 1, wherein said closing pressure has at least two regions. 5. The syringe pump according to claim 1, wherein said closing pressure is determined by comparing with said threshold value based on a moving average value in a predetermined sampling cycle. 6. The occlusion pressure further includes an occlusion pressure lower limit value, and the lower limit value is stored in a table for each of one or more syringe makers and syringe volumes. The syringe pump according to any one of the above. 7. A method for detecting an occlusion pressure in a syringe pump for injecting a drug solution in a syringe according to a predetermined injection pattern, the method comprising: detecting a capacity of a syringe; and setting and inputting a maker of the syringe. A step of inputting a drug injection pattern; a step of specifying a set syringe based on the detected syringe volume and a set and input syringe manufacturer name; and a step of selecting a syringe cross-sectional area, a syringe sliding resistance, a syringe outer diameter, Deciding the threshold value of the occlusion pressure upper limit value based on the data stored by tabulating the data including the upper limit value of the syringe occlusion pressure for one or more syringe manufacturers and syringe volumes, and the specified syringe; Comparing the determined syringe closing pressure with the threshold value, based on a result of the comparing means. Occlusion pressure detecting method of a syringe pump, characterized in that comprising the step of generating an alarm. 8. A method of detecting an occlusion pressure in a syringe pump for injecting a drug solution in a syringe according to a predetermined injection pattern, wherein the type of the syringe is attached to a set syringe and includes a syringe manufacturer and a capacity of the syringe. Reading the identification information specifying the, and the step of inputting the injection pattern of the medicine, one or more syringe manufacturers, including data including the syringe cross-sectional area, syringe sliding resistance, syringe outer diameter, the upper limit of the syringe closing pressure, A step of determining a threshold value of the occlusion pressure upper limit value based on data stored in a table for each syringe volume and the specified syringe; a step of comparing a detected syringe occlusion pressure with the threshold value; Generating an alarm based on the result of the step (c). Pressure detection method. 9. A method for detecting an occlusion pressure in a syringe pump for injecting a drug solution in a syringe according to a predetermined injection pattern, the method being attached to a set syringe and including a syringe manufacturer, a syringe volume, and a drug name. Reading identification information that specifies the type of syringe; inputting a drug injection pattern; and storing at least one piece of data including an upper limit value of a syringe cross-sectional area, a syringe sliding resistance, a syringe outer diameter, and a syringe closing pressure. Syringe maker, data stored in a table for each syringe volume, a step of determining a threshold of the occlusion pressure upper limit based on the specified syringe, and a step of comparing a detected syringe occlusion pressure with the threshold, Generating an alarm based on the result of said comparing means. Occlusion pressure detecting method of flops. 10. The method according to claim 7, wherein the closing pressure has at least two regions. 11. The syringe pump according to claim 7, wherein the closing pressure is determined by comparing the closing pressure with the threshold value based on a moving average value in a predetermined sampling cycle. Pressure detection method. 12. The occlusion pressure further includes an occlusion pressure lower limit value, and the lower limit value is stored in a table for each of one or more syringe makers and syringe volumes. The method for detecting an occlusion pressure of a syringe pump according to any one of the above. [0001]