JP3415282B2 - Portable infusion device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable infusion device, for example, provided with a roller-type infusion pump for infusing a liquid to be transported and stored in an infusion bag. High calorie infusion,
The present invention relates to a portable infusion device for continuously administering a nutrient solution, a drug solution, and the like into a living body. [0002] Conventionally, in the medical field, nutrient solutions,
2. Description of the Related Art When an oral liquid such as a drug solution or physiological saline is administered into a living body, an infusion device for infusing a predetermined amount of these liquids is used. As this type of infusion device, there are a full-fledged infusion device used in a hospital and a small-sized portable infusion device that can be used at home, but infusion pumps called roller pumps are used in both cases. . In this roller pump, after a tube is set at a predetermined position, a plurality of rotating rollers for obtaining a rotational driving force from a motor are pressed against the outer peripheral surface of the tube to crush the tube and fill the tube. The liquid is sequentially sent out, and is preferably used for an infusion device because of its excellent reliability and hygiene. In order to drive the roller type pump constructed as described above, a predetermined voltage is applied to the motor, and the rotation speed of the motor is appropriately controlled in real time, so that the inner diameter of the tube and the pressing of the roller are controlled. Is configured such that the user can arbitrarily set the delivery flow rate of the infusion per unit time (for example, one hour) based on the relationship. That is, the motor drive shaft of the roller pump is 1
The infusion volume for each rotation is known in advance from the tube inner diameter and the tube wall thickness, so by counting only the number of rotations of the motor drive shaft, the infusion amount calculated from the start of infusion is calculated, and the user Infusion devices have been proposed in which the integrated amount of infusion is appropriately notified. Further, there has been proposed an infusion apparatus having a function of presetting an infusion scheduled amount in advance and automatically terminating the infusion when the infusion for the set amount is completed. [0006] However, in the above-mentioned infusion device, as a power supply for driving the motor of the infusion pump, a nicd battery, which is a rechargeable secondary battery, or widely sold and easily available. In the case of using a manganese battery as a primary battery (hereinafter referred to as a battery including both batteries), if an infusion is performed for a long time or the device is left unused for a long time, the battery may be damaged. As the power supply voltage decreases, the motor that should be driven at an appropriate voltage is not normally driven. As a result, the rotating roller of the roller pump does not rotate at a predetermined rotational speed, the rotating roller rotates intermittently, and finally the rotating roller stops, so that the infusion operation cannot be performed halfway. There is a risk of occurrence of such a situation. Accordingly, the present invention has been made in view of the above circumstances, and particularly when a battery is used as a power supply for a motor for driving a roller type pump,
To prevent unstable infusion operation occurrence of the roller pump due to low battery power supply voltage, b halfway infusion
Forcibly stopped the roller pump and replaced the battery
Later, when infusion is performed again, the infusion volume of the previous infusion is checked.
It is an object of the present invention to provide a portable infusion device which is capable of performing an infusion of an appropriate amount as a whole . [0010] In order to solve the above-mentioned problems and to achieve the object, the present invention provides a vertically elongated main body and a middle part of a liquid feeding tube connected to an infusion container. A roller-type pump that crushes a portion fixed on the upper surface portion of the main body portion by a rotating roller so that the portion becomes immobile, and sequentially rotates and rotates the rotating roller to perform infusion from the infusion container; A mobile phone comprising: a pump driving means comprising a circuit and a motor for driving the roller pump in a predetermined manner; and a battery detachably provided in the main body to supply a predetermined voltage to the pump driving means. a type infusion device, if the battery voltage is below a predetermined value, to stop the power supply to the pump drive means, according to the battery voltage To work
An element, connected to the element, and
Circuit to prevent the motor from driving by applying a resistive load
Display the configured means and the infusion volume set arbitrarily,
The apparatus is characterized in that it is provided with an infusion amount setting display means for automatically displaying the reduced amount of the infused fluid and for automatically stopping the roller pump. In the above construction, the transported liquid stored in the liquid container is infused at a set infusion flow rate and supplied to the motor of the driving means for driving the rotating roller of the roller pump. When the power supply voltage falls below the predetermined value, the subsequent infusion operation is stopped and the infusion amount setting display means is turned off.
Infusion volume can be set arbitrarily and the amount of infusion can be confirmed.
Work on to so that. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A portable roller type infusion pump according to one embodiment of the present invention will be described below in detail with reference to the accompanying drawings. It is an external appearance perspective view, and has shown the use condition which set the flexible tube | tube 102, such as polyvinyl chloride resin connected to the infusion bag 100 shown by the broken line in the figure. FIG. 2 is a plan view of an upper surface portion of the infusion device 1 of FIG. First, in FIG. 1, an infusion bag 100 containing a predetermined amount of a liquid to be taken, such as a nutrient solution, a drug solution, or a physiological saline, is located upstream of a tube 102 indicated by a broken line in the figure. Position. Further, by performing the closing and opening of the tube 102 immediately below the infusion bag 100, the infusion can be cut when the tube is mounted on the infusion bag 100, and the infusion can be opened when the tube 102 is filled. An operated clamp 101 is provided. And
A luer 103 inserted into a predetermined part of the body is connected to the downstream end of the tube 102, and the middle part of the tube 102 set as described above is inserted into the groove 3 in the roller type pump part 2 of the infusion device 1. , 4 and used. On the other hand, the infusion device 1 is a battery 16 for a power supply indicated by a broken line in the figure, which is a rechargeable rechargeable secondary battery NiCd battery or a readily available manganese battery of C2 size. A lid member that is detachable for two,
A control circuit board, a drive motor 15 shown in broken lines for giving a driving force to the above-mentioned roller pump, and the like, and a substantially opaque and relatively high rigidity made of styrene resin, ABS resin, etc. Resin body 10
For example, the main body 10 has a vertically long shape as shown in the drawing so that the main body 10 can be accommodated in a breast pocket. The power switch 7 and the flow rate display units 14a, 14b, 14c,
The flow rate setting units 11 and 12 are provided, and a protective cover 13 for preventing impact from external impact prevents malfunction of the apparatus due to careless contact between the flow rate setting units 11 and 12 and the power switch unit 7. It is configured to be. For this purpose, the protective cover 13 is provided in a sliding manner in the direction of the arrow in the figure, and is molded from a substantially transparent hard plastic such as a styrene resin or a polypropylene resin, and has a sufficient strength. Next, with further reference to the plan view of FIG. 2, a concave portion 7 is formed around the power switch portion 7, and the switch 7 is provided at the bottom of the concave portion so as to be careless. The ON / OFF of the power supply due to a short contact is prevented. On the other hand, the flow rate setting unit is a dial type comprising dials 11 and 12, and is used for setting the flow rate. The infusion flow rate is displayed from 0 to 999 milliliters / hour with a precision of 1 milliliter / hour and the dial 12 displays a 100-digit numerical value. While the setting can be displayed on the display unit 14a, a ten-digit numerical value can be set and displayed on the display units 14b and 14c by operating the dial 11. In addition, the display unit may be provided with a function of displaying the amount of infusion subtracted with the operation of the pump. In this case, when the infusion is forcibly stopped due to a voltage drop of the battery during the infusion, the amount subtracted after the battery replacement is used. Infusion can be started after setting. Further, the flow rate display unit 14 is not marked with a segment such as a current consuming liquid crystal in order to minimize the use of the battery power and to suppress the power consumption of the entire apparatus. By the numbers 0-9, 0
Up to 999 can be displayed. Further, in FIG. 2, grooves 3 and 4 for fixing and guiding a tube (not shown) are provided.
Has a function of a tube guide for holding the tube 102 shown in FIG. 1 so that the tube does not move in order to squeeze the tube between rollers of a roller type pump. A cap 6 made of a hard plastic such as a transparent polypropylene resin is covered from above to prevent external force from acting during the infusion operation. In order to clearly indicate the direction of infusion, a red arrow display section 3b and a blue arrow display section 4b
Are provided near the grooves 3 and 4 so that the user can set the tube without fail using the arrow as a guide. The infusion device 1 described above incorporates the battery 16 described above, for example, in order to enable a continuous use time of about 24 to 48 hours even outdoors without a commercial power supply. Dimensions 85 x 30 x 110 so that they can be stored in a breast pocket, for example.
It is designed to be small and light so that it is about mm and the weight is about 450 g. The infusion device 1 has an alarm function of at least two types of sounds, and has at least two types of sounding patterns (for example, a beeping sound and a continuous beeping sound) to provide a power supply battery. By notifying the user of the low voltage state of the voltage 16 and the occurrence of the overload state of the motor 15 to the user, it is possible to warn the user. However, a motor control function described later is provided on the assumption that the use is continued ignoring this warning. FIG. 3 shows an example of a battery power supply circuit for driving the motor, in which the voltage is a predetermined value (for example, a low battery alarm start voltage value of 2.3 volts).
Operational diagrams for the above case (a) and for a case where the voltage falls below a predetermined value (for example, a stop voltage value of 2.15 volts) (b) are shown respectively. First, in FIG. 3A, the power switch 7 is connected to the positive side of the battery 16, and after the noise is removed by the capacitor C1 branched from the switch 7 and grounded, the transistor T
The circuit is connected so as to be inputted to R1 and inputted to the drive motor 15, and is configured to be driven at a constant rate when the power switch 7 is turned on. On the other hand, the capacitor C
Between the transistor TR1 and the transistor TR1, a transistor TR2 connected via a diode D1 is grounded via a resistor R3, and a resistor R4 is connected on the base side. The current flowing through R3 is set to be larger than the current flowing between the emitter and collector of TR1 (for example, 2.15 volts) in order to prevent the motor from changing from the motor load to the R3 load during operation of the motor and stopping the motor. . As shown, the IC 20 connected in parallel with the transistor has an output terminal that goes to a “high” level when the voltage of the battery 16 is higher than a predetermined value, and the base side is connected to this output terminal. Transistor TR
2 is turned "OFF", while the transistor TR3 connected to the base side via the resistor R5 is turned "ON" to turn on the transistor TR1 for supplying power to the motor 15. I have to. Next, referring to FIG.
Becomes lower than a predetermined value, the output of the IC 20 becomes the "low" level and the transistor TR2 is turned "on". As a result, the load is further applied to the circuit by the resistor R3. The power supply to the motor 15 is stopped. In other words, by reducing the voltage to a voltage at which the motor 15 is not substantially driven, the power supply such that the roller pump 2 is not rotated at a predetermined rotation speed, intermittently rotates, or stops, or the like. It is possible to prevent unstable operation due to a decrease in voltage. The circuit described above is an IC for monitoring voltage.
Although only an example composed of the transistor 20, the transistor TR, and the resistor has been described, the present invention is not limited to this, and various other circuits such as a method of detecting a decrease in the motor speed due to a decrease in the motor drive voltage and forcibly stopping the motor are provided. There is a configuration. As described above, according to the present invention,
When a battery is used as the power supply for the motor for driving the roller pump, the unstable infusion operation of the roller pump due to a decrease in the battery power supply voltage is prevented .
To stop the roller pump forcibly during the infusion,
When performing infusion again after replacing the battery,
The infusion volume of the infusion volume can be recognized so that the appropriate
It is possible to provide a portable infusion device that is to allow the. [0027]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of a portable infusion device 1 according to an embodiment of the present invention. FIG. 2 is a plan view of the portable infusion device 1 of FIG. 3A and 3B are electric circuit diagrams of a roller driving unit of the roller-type infusion pump, wherein FIG. 3A is an operation explanatory diagram when a voltage is normal and FIG. [Description of Signs] 1 Portable infusion device 2 Roller pump unit 3, 4 Groove (tube fixing unit) 7 Power switch 11, 12 Infusion amount setting unit 14 Infusion display unit 15 Motor 16 Battery

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-240457 (JP, A) JP-A-5-42218 (JP, A) JP-A-55-158053 (JP, A) JP-A-2- 280763 (JP, A) JP-A-54-105890 (JP, A) JP-A-64-58262 (JP, A) JP-A-3-88547 (JP, U) Japanese Translation (58) Field surveyed (Int. Cl. ⁷ , DB name) A61M 5/142 A61M 5/00 330

Claims (1)

(57) [Claim 1] A vertically long main body portion and an upper surface portion of the main body portion are fixed such that an intermediate portion of a liquid feeding tube connected to an infusion container is immobile. A roller pump for crushing a part by a rotating roller and sequentially rotating the rotating roller to perform infusion from the infusion container; a pump driving means comprising a drive circuit and a motor for driving the roller pump in a predetermined manner; A portable infusion device comprising: a battery detachably provided in the main body to supply power of a predetermined voltage to the pump driving means; and wherein the battery voltage is equal to or lower than a predetermined value, In order to stop power supply to the pump driving means, the battery
-An element that operates in response to a voltage, and
A resistive load is applied to the drive circuit to
A circuit configured so as not to be driven , and an infusion amount setting display means for displaying an infusion amount which is arbitrarily set, reducing and displaying the infused infusion amount, and automatically stopping the roller pump. A portable infusion device, comprising: