JPH0576446U - Syringe pump - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate medical errors. According to the drug to be administered (anticoagulant), the injection mode is switched by the switching means, and the injectable range of the drug per unit time in the switched infusion mode is automatically displayed. When the setting of the dilution ratio is changed, the injectable range is automatically changed and displayed accordingly. Switch 1
When you operate 1 to set the injection amount per unit time, the set injection amount is displayed along with the injectable range display,
If you make a setting outside the range, you can see immediately.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a syringe pump that continuously injects a drug solution.

[0002]

[Prior Art]

 Syringe pumps that use single-use (disposable) plastic syringes or repetitive glass syringes (injectors) for intravenous and intramuscular injection are widely applied for treatment. Especially in blood purification treatment, a syringe pump is an indispensable device for anticoagulation because it circulates blood extracorporeally. Heparin has been frequently used as an anticoagulant drug, and it is no exaggeration to say that a syringe pump is a heparin pump.

In the case of systemic heparinization method in dialysis therapy, heparin is infused at 1,000 to 3,000 units (about 1 to 3 cc) before the start of dialysis, and 500 to 1,500 units are maintained per hour after the start of dialysis. It is generally injected. On the other hand, in the case of the local heparinization method, heparin is continuously infused at 1,500 to 2,500 units per hour into blood drawn from the human body, and neutralized with protamine sulfate at the time of blood return. If 1 ml is used as 1 unit, 3.5 ml to 10.5 ml will be injected, assuming that dialysis is performed for 5 hours. For this reason, a disposable syringe of 20 ml is usually set in the injection pump (syringe pump) and used.

Although the above is a normal example, the injection amount is increased when blood tends to coagulate, or a small injection amount is set for a person having a low hematocrit (ratio of red blood cells to blood). Therefore, the injection amount of the syringe pump per unit time is variable, and is, for example, 0.1 to 9.9 ml / hour. The amount of injection per unit time can be set to 0.1 ml step, 0.5 ml step, or continuously variable with a variable resistor.

Most of the set syringes are compatible with 20 ml, but there are three types, 20 ml, 30 ml, and 50 ml, and a type that allows two syringes to inject simultaneously.

[0006]

[Problems to be solved by the device]

 As described above, the conventional anticoagulant is predominantly heparin. However, the side effects of arrhythmia due to the influence of free fatty acids in long-term dialysis and the problem for patients with bleeding tendency have led to an increase in the use of fusan (nafamostat mesylate) in recent years. And it is becoming common to use heparin and fusan in the same dialysis facility. Fusan is dissolved at 20 to 50 mg / hour in a 5% glucose injection solution and continuously infused. Therefore, the setting of the injection amount per unit time and the standard unit are different from those of heparin. Since the amount of anticoagulant injected per unit time has a great influence on the coagulation system of a patient, the amount of injection should be carefully monitored.

However, the burden on the treatment staff is heavy under the absolute shortage of nurses and technicians, and the difference between heparin-using patients and fusan-using patients depends on human memory. As long as conventional syringe pumps that do not have a distinguishing mode are used, misconfiguration is an unavoidable problem, resulting in a significant impact on the patient's coagulation system. Compared to drug advances, injectable drugs, and syringe pumps that do not have a separate mode of application, are old-fashioned, place a great psychological burden on staff, and above all, pose a problem for safe treatment of patients. ing .

Further, the syringe pump has a wide range of applications such as venous thrombosis, pancreatitis treatment, DIC (diffuse intravascular coagulation), as well as anticoagulant injection. In addition to heparin and fusan, there are various kinds of drugs such as FOY (gabexate mesylate), sulonone (argatroban), and urokinase. Naturally, the setting of the injection amount per unit time differs depending on the drug. For drug injection, an infusion pump may be applied, but it is mostly used when injecting a larger amount than a syringe pump, and since it is a roller type or finger type, the injection accuracy is poor at a small flow rate. On the other hand, the syringe pump has its injection range originally determined in consideration of heparin injection, and the majority has only an injection range of 10 ml or less.

As described above, the function of the conventional syringe pump is insufficient for application when the above-mentioned drug injection is performed using a syringe.

[0010]

[Means for Solving the Problems]

 According to this invention, means for switching the injection mode according to the drug to be administered and its use, means for automatically displaying the injectable range of the drug per unit time in the switched injection mode, and unit for the unit time There are provided means for manually setting the infusion amount and means for automatically displaying the drug used in the switched infusion mode.

[0011]

【Example】

 FIG. 1 shows an embodiment of this invention. This embodiment is a case where it is configured as an example using a microcomputer. ROM 2, RAM 3, I / O 4, and timer 5 are connected to the CPU 1. In this embodiment, the usable drugs are heparin sodium, heparin calcium, and fusan, and the mode setting of which drug is to be administered, that is, the mode switching is performed by the selection switch 6. The mode data designated by the selection switch 6 is read by the CPU 1 via the I / O 4. In this example, a pulse motor is used as a motor 9 for driving a syringe plunger (not shown). The motor 9 is driven by a pulse motor driver 7 based on a drive signal output from the I / O 4. It A liquid crystal display (LCD) 10 that displays the current injection mode specifications is driven via the display driver 8.

FIG. 2 shows the appearance of the selection switch 6 for mode setting, and a normal three-mode changeover switch for rotating the knob to select the mode is used. Now, a case where heparin sodium is selected as the anticoagulant injected by the switch 6 will be described. The heparin used, unit, and injectable range are as follows. -Heparin used: Novo-Heparin injection 1,000 units 20 ml-Injectable range: 0.1 to 39.9 ml / hour The indicator 10 shows the injection mode specifications as shown in FIG. In this case, the infusion mode item is displayed as "heparin sodium". Regarding the dilution ratio, the display can be set in steps of 500 units / ml, and the "△" (increase) switch and "▽" (") ( Decrease) Depending on the switch. In this case, since it is 1,000 units, the dilution ratio item is displayed as "1,000 units / ml". In this example, the injectable range is uniquely determined in accordance with the display-set dilution ratio, and "0.1-19.9 ml / hour" is displayed in the item of the injectable range. The minimum unit for setting the injection volume is 0.1 ml step, and the injection volume (increase) and “▽” (decrease) switches corresponding to each digit on the right side of the display surface ml / hour). These set values are input to the I / O 4 via the switch input circuit 12 and are discriminated by the CPU 1.

When using the same heparin and injecting another dilution ratio, for example, 2,000 units / ml, the dilution ratio setting switch 4 beside the display surface is operated to change the dilution ratio display on the display surface to 2. If it is set to 000 units / ml, the injectable range is automatically changed and displayed at 0.1 to 19.9 ml / hour. Since the injectable range per unit time corresponding to the dilution ratio set in this way is automatically displayed, it is possible to see the injectable range and set the injection amount within that range. There is no risk of accidentally setting the external injection volume. In addition, the data necessary for displaying the injectable range is stored in advance in the ROM 2 in association with each drug.

In addition, when using fusan under the following conditions: -Fusan used: 10 mg for fusan injection 2 (dissolved in 4 ml of 5% glucose) -Injection amount: 20 mg / hour The injectable range is automatic in this example. To 0.1 to 79.9 ml / hour. Regarding the input of the injection mode and the dilution ratio, in addition to the input by the switches 6 and 11 as described above, the setting by the card and the setting by the bar code can be considered. FIG. 4 shows a configuration example in the case of bar code input, and the same parts as in FIG. Various modes such as heparin sodium, heparin calcium, and fusan on the barcode sheet 6a are used as the barcode 21a, and the dilution ratio (for heparin sodium and heparin calcium, 500 units to 1,500 units, 500 unit steps, for fusan, A total of 11 types (NO. 1 to 11) of barcodes are printed as barcode 21b (10 to 50 mg, 10 mg steps), and the barcode of the corresponding number according to the conditions can be displayed on the handy barcode scanner 6b. When scanned, the output of the bar code scanner 6b is input to the CPU 1 through the bar code scanner I / F 6c, and the result and the injectable range corresponding to each number are displayed on the display unit 10. After that, the injection amount is set by the switch 11 as in the above example.

Further, when the mode selection switch 6 is used in order to correspond to the modes such as anticoagulant injection and thrombolytic injection in the extracorporeal circulation treatment other than dialysis, the multi-contact switch and the corresponding switch are used. A table (specifications such as drug name and use) may be added to the table in the ROM 2. In the case of the bar code type, the corresponding bar code and the corresponding table in the ROM 2 may be added.

Further, the anticoagulation method was described in this example corresponding to the systemic heparinization method, but it is naturally applicable to the local heparinization method in which protamine sulfate is used in combination. The safety mechanism such as the notification of the completion of injection and the abnormal pressure of the injection line, which is provided in the conventional syringe pump, is also incorporated in this invention.

[0017]

[Effect of the device]

 As described above, according to the present invention, the mode can be switched depending on the injecting drug and the intended use, the drug name and the dilution ratio are displayed, and the injectable range is automatically displayed accordingly, so It is possible to significantly reduce medical malpractice due to a mistake in the mixing ratio or dilution ratio. In addition, the burden on staff such as doctors, nurses, and technicians can be greatly reduced. Therefore, the application range of the syringe pump can be greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a plan view showing the appearance of an example of a mode selection switch 6.

FIG. 3 is a diagram showing a display example on a display surface of a display device 10 and an arrangement example of setting switches.

FIG. 4 is a block diagram showing another embodiment of the present invention.

Claims (1)

[Scope of utility model registration request] 1. A means for switching an infusion mode according to a drug to be administered, a means for automatically displaying an injectable range per unit time of the drug in the switched infusion mode, and an infusion amount per unit time. A syringe pump comprising: a means for manually setting and a means for automatically displaying an injectable drug used in the switched infusion mode.