JPH053316B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a syringe pump used for injecting a drug solution,
In particular, the present invention relates to a syringe pump with a flow rate changing function that allows one-touch change to a predetermined injection flow rate value.

[Prior Art] In a conventional syringe pump, when setting the flow rate prior to driving the syringe pump, the flow rate display value 24 is changed by pressing the flow rate set value increase switch 25 (hereinafter referred to as + switch) on the operation panel switch shown in FIG. The flow rate display increases and the flow rate set value decrease switch 26
When you press (hereinafter - switch), the flow rate decreases. In general, the flow rate range is wide, from 0.05 to 60 ml/h, and the flow rate setting change range is about 700 steps, so if you want to change from a small flow rate to a large flow rate or from a large flow rate to a small flow rate, you have to press the switch 700 times or press the switch. You need to keep pressing.

That is, with conventional syringe pumps, in order to change the flow rate set value when setting the flow rate prior to driving the syringe pump, it is necessary to keep pressing the flow rate set value increase switch or the flow rate set value decrease switch with your finger. For this reason, when the pump is used by many patients, small flow rates and large flow rates are repeated in a complicated manner, which takes time to operate the syringe pump and places a burden on doctors and nurses.

JP-A-59-57663 describes a flow control device that has separate switches for setting each digit.
No. 29364 and Japanese Unexamined Patent Publication No. 61-85960 disclose liquid drug injectors in which data is input using a numeric keypad.

However, the above device significantly changes the conventional structure by adding new switches and keys, and is not suitable for simplifying or downsizing the structure of the device, and also complicates operation. Therefore, operational errors are likely to occur.

[Problems to be Solved by the Invention] The present invention has been made in view of the difficulty in operating the conventional syringe pump and the simplification and miniaturization of the structure. When changing the flow rate setting value of the syringe pump during the previous flow rate setting, the flow rate value can be changed to a predetermined flow rate value, such as the maximum value, with a one-touch operation that can be easily memorized by anyone and does not cause malfunctions, without making any major changes to the existing structure. To provide a syringe pump with a flow rate change function that allows the flow rate to be changed to a minimum value.

[Means and effects for solving the problem] In order to solve this problem, the syringe pump with a flow rate change function of the present invention is a syringe pump with a flow rate change function that injects a drug solution based on a flow rate set value set from the outside. In a pump, when setting the flow rate prior to driving the syringe pump, the flow rate set value is changed to a preset predetermined value by simultaneously operating multiple existing switches having other functions on the operation panel switch section. A flow rate set value changing means is provided.

Here, the flow rate set value changing means includes a first flow rate setting means for changing the flow rate set value to the maximum injection amount by simultaneously pressing a stop switch and an injection amount increasing switch on the operation panel switch section, and a stop switch. and a second flow rate setting means for changing the flow rate set value to the minimum injection amount by pressing the injection amount reduction switch at the same time.

[Example] FIG. 1A is a configuration diagram of a syringe pump of this example. The flow rate control section 5 controls the injection amount of the chemical solution according to the inflow amount stored in the flow rate storage section 4. The value stored in the flow rate storage section 4 is the maximum flow rate setting section 1.
is set by the flow rate setting section 2 and the minimum flow rate setting section 3. Among these, the flow rate setting section 2 gradually increases or decreases the flow rate, and the maximum flow rate setting section 1 and the minimum flow rate setting section 3 set the flow rate to the maximum value or the minimum value.

FIG. 1B is a hardware configuration diagram of the syringe pump of this embodiment. 10 is a microcomputer that controls the syringe pump, and stores a CPU 10a for calculation and processing and a processing program.
It has a ROM 10b and a RAM 10c for auxiliary storage. Reference numeral 11 denotes a panel input section, which has various operation switches. Reference numeral 12 denotes an injection amount display section for displaying the flow rate, and in this embodiment, a liquid crystal display is used to save energy. Reference numeral 13 denotes a motor rotation detection section that detects the rotation speed of the pump motor 15; 14 a motor drive section that drives the pump motor 15; and 15 a pump motor whose flow rate is controlled by the rotation speed of the motor 15. Reference numeral 16 denotes a power source for the control unit, which uses a battery in this embodiment for portability.

FIG. 2 is a diagram showing the operation panel surface of the syringe pump of this embodiment. The operation panel surface 20 includes a power switch 21 for turning the power ON/OFF, a buzzer stop switch 22 for stopping the alarm buzzer, a switch 25 for increasing the flow rate, a switch 26 for decreasing the flow rate, and a switch 26 for decreasing the flow rate. It is comprised of a start switch 27 for starting injection, a stop switch 28 for stopping injection of chemical solution, a lamp 23 for alarm type, and a flow rate value display 24.

Here, when the stop switch 28 is pressed, the drive of the pump is stopped. Switch 2 when the pump is stopped
When you press 5, the flow rate value display 24 and the flow rate value display 2
The inflow rate setting value of 4 decreases.

The injection volume setting value can be set from 0.05ml/h to 60ml/h, increasing or decreasing in steps of 0.05ml/h from 0.05ml/h to 10ml/h, and 0.1ml/h from 10ml/h to 60ml/h.
Increase or decrease by increments. Therefore, it takes quite a long time (about 40 seconds) for the value to change by, for example, 700 steps.

In this example, the flow ranges from a small flow rate of 0.05ml/h to a large flow rate of 60ml/h.
When changing to a value close to ml/h, by pressing the stop switch 28 and switch 25 together, the arbitrary displayed value can be changed to 60 ml/h with one touch. On the other hand, from a value close to the large flow rate value of 60ml/h
When a value close to 0.05 ml/h is desired, the value can be changed to 0.05 ml/h with one touch by pressing the stop switch 28 and switch 26 together.

For example, to change 5.00ml/h to 50.0ml/h, press the stop switch and the switch,
Change the display from ml/h to 60.0ml/h, then press the switch to change from 60ml/h to 50ml/h. or,
When changing from 40.0ml/h to 1.00ml/h, press the stop switch and the switch, 40ml/h → 0.05
Change the display to ml/h, then press the switch to change from 0.05ml/h to 1.00ml/h.

FIG. 3 is a flowchart showing the processing procedure of the syringe pump of this embodiment. First, step
Set appropriate initial values in S10. Step S20,
Start with S30 and S40 switch 27, switch 25,
Check whether switch 26 has been pressed. If the start switch 27 is pressed, the process advances to step S21, where the motor 15 is driven at the currently set flow rate, and steps S21→S22 are repeated until the stop switch 28 is pressed.

If switch 25 is pressed, the step
Proceed to S31 and check whether the stop switch 28 is pressed, and if it is pressed, proceed to step S31.
In S34, the flow rate is set to the maximum value (60ml/h in this example). If the stop switch 28 is not pressed, proceed to step S32, add a predetermined flow rate value, and continue in step S32 until the switch 25 is released.
→Repeat S33.

If the switch 26 is pressed, the step
Proceed to S41 and check whether the stop switch 28 is pressed, and if it is pressed, the step
In S44, the flow rate is set to the minimum value (0.05ml/h in this example). If the stop switch 28 is not pressed, proceed to step S42, add a predetermined flow rate,
Step S42→ until switch 26 is released
Repeat S43.

FIG. 4 is a timing chart showing the timing of the switch and the change in injection amount in this embodiment.

The displayed value of the injection amount is 60ml/h at point A when the stop switch 28 and switch 25 are pressed together.
At time B, when the stop switch 28 and the switch 26 are pressed together, the rate has changed to 0.05 ml/h.
Furthermore, as can be seen from Fig. 4, the stop switch 28
There is no limit to the order in which the switch 25, the stop switch 28, and the switch 26 are pressed.

As described in detail above, the present invention is applicable to a syringe pump when a doctor using the pump sets an injection flow rate value and the new value is different from the previous value, or when the doctor who uses the pump wants to set the injection flow rate in a hurry. If the newly set flow rate is close to 60 ml/h, press the stop switch and the volume increase switch together with one touch to set the flow rate to 60 ml/h and then to the predetermined flow rate. Similarly, when the flow rate is close to 0.05ml/h, the flow rate can be set to 0.05ml/h by pressing the stop switch and the volume reduction switch, so the flow rate can be set in a short time.

Furthermore, since the time required to press the switch with the fingertip is shortened, the burden on the fingertip can be reduced.

[Effects of the Invention] According to the present invention, when changing the flow rate setting value of the syringe pump when setting the flow rate before driving the syringe pump, anyone can easily memorize it without significantly changing the existing structure, and it is possible to prevent malfunctions. Quickly change the predetermined inflow value with one-touch operation.
For example, a syringe pump with a flow rate changing function that can change the flow rate to a maximum value or a minimum value is provided.

[Brief explanation of the drawing]

Fig. 1A is a block diagram of the syringe pump of this embodiment, Fig. 1B is a hardware block diagram of the syringe pump of this embodiment, Fig. 2 is a diagram showing the operation panel of the syringe pump of this embodiment, and Fig. 3 4 is a flowchart showing the processing procedure of the syringe pump of this embodiment, and FIG. 4 is a timing chart showing changes in the display of the injection amount of the syringe pump of this embodiment. In the figure, 1...Maximum flow rate setting section, 2...Flow rate setting section, 3...Minimum flow rate setting section, 4...Flow rate storage section,
5...Flow control unit, 10...Micro computer, 10a...CPU, 10b...ROM, 10
c...RAM, 11...Panel input section, 12...
Injection amount display section, 13...Motor rotation detection section, 14
... Motor drive unit, 15 ... Motor, 16 ... Power supply, 20 ... Operation panel, 21 ... Power switch, 22 ... Buzzer stop switch, 24 ... Injection amount display, 25 ... Switch, 26 ... ...switch, 27...start switch, 28...stop switch.

Claims (1)

[Claims] 1. A syringe pump with a flow rate change function that injects a drug solution based on a flow rate setting value set from the outside, which includes:
A flow rate change function characterized by comprising a flow rate set value changing means for changing the flow rate set value to a predetermined value by simultaneously operating a plurality of existing switches having other functions in the operation panel switch section. with syringe pump. 2. The flow rate setting value changing means includes: a first flow rate setting means for changing the flow rate setting value to the maximum injection rate by simultaneously pressing a stop switch and an injection rate increase switch on the operation panel switch section; 2. The syringe pump with a flow rate changing function according to claim 1, further comprising second flow rate setting means for changing the flow rate set value to the minimum injection amount by pressing the decrease switch simultaneously.