JPH0628124Y2 - Automatic liquid supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to an automatic liquid supply device for supplying a cardioplegic solution to the coronary arteries of the heart, for example.

“Prior Art” Conventionally, in open heart surgery, a cardioplegia solution is supplied (injected) to a coronary artery in order to supply nutrition to the heart. To supply the cardioplegia solution to the coronary artery, the cardioplegia solution in the cardioplegia solution reservoir is fed from the cardioplegia solution reservoir to a delivery tube,
A myocardial protection liquid supply device is used that intermittently supplies a predetermined supply amount to a coronary artery from a cannula connected to a tip of the liquid supply pipe (roller pump) and a liquid supply pipe.

When this cardioplegia solution supply device is used, the amount of cardioplegia solution supplied to the coronary arteries can be visually read by observing the displacement of the liquid level in the cardioplegia solution reservoir from the scale provided on the side wall of the cardioplegia solution reservoir. Or the flow rate of the roller pump is multiplied by the cardioplegic solution supply time, and in this case, the cardioplegia solution supply time and the cardioplegia solution supply intermittent time can be set manually with a stopwatch or the like. It is measured by operating.

[Problems to be solved by the device] However, in the above-described method of supplying the cardioplegia solution to the coronary arteries, it takes time and labor to read the scale of the reservoir, and the roughness of the scale is about the same. ,
Alternatively, there is a problem that a reading error causes a measurement error.

Further, at the start of the cardioplegic solution supply and at the end of the cardioplegia solution supply, the stopwatch must be manually operated to measure the cardioplegia solution supply time and the cardioplegia solution supply intermittent time, which is not only troublesome. There is a problem in that an operation delay is likely to occur and an error occurs in the supply time and the supply intermittent time.

In the above-mentioned myocardial protection solution supply to the coronary arteries, it is considered important to accurately measure the myocardial protection solution supply timing, supply time, and supply amount, and it is important to accurately measure these values. The measurement results in a heavy burden on the cardioplegic solution supply operator.

It is an object of the present invention to provide an automatic liquid supply device that solves the above problems of the conventional cardioplegia solution supply device.

"Means for Solving the Problem" The present invention has the following configuration in order to achieve the above object. That is, a reservoir, a liquid feeding mechanism, a liquid feeding switching mechanism, a liquid detection mechanism, and the reservoir are sequentially connected via a flow path, and liquid feeding from the liquid feeding mechanism is connected to the liquid feeding switching mechanism. To either the supply unit or the liquid detection mechanism,
Based on the liquid detection signal and the liquid-free detection signal of the liquid detection mechanism, it is possible to intermittently switch liquids by the liquid transfer switching mechanism via a control mechanism, and the control mechanism is configured to control the liquid-free detection signal of the liquid detection mechanism, As a liquid crystal display device having a liquid supply time, a liquid supply intermittent time, a calculation means for calculating the liquid supply amount to the liquid receiving portion based on a liquid detection signal, and a display means for displaying the liquid supply time, the liquid supply intermittent time, and the liquid supply amount. There is.

[Operation] According to the above configuration, in a state where the liquid supply from the liquid supply mechanism flows to the liquid detection mechanism through the liquid supply switching mechanism, the communication between the liquid supply mechanism and the liquid supply section is cut off, and the reservoir The liquid inside flows out of the reservoir and circulates in the liquid circulation path, and the liquid detection mechanism detects the flow of the liquid in the liquid detection mechanism. Based on the detection signal, the arithmetic means outputs the liquid to the liquid supply part. The intermittent supply time of the liquid is calculated, and the intermittent supply time of the liquid is displayed on the display unit, which shows that the liquid is not supplied to the liquid supply unit.

Further, when the liquid detection mechanism detects the flow of the liquid, after a predetermined time, the control mechanism switches the liquid transfer switching mechanism based on the detection signal, disconnecting the communication between the liquid transfer mechanism and the liquid detection mechanism, and simultaneously transferring liquid. The mechanism and the liquid receiving part communicate with each other, and the liquid sending mechanism sends the liquid to the liquid receiving part. Then, the liquid does not flow to the liquid detection mechanism, the liquid detection mechanism detects this liquid-free, and the calculation means calculates the supply time and the supply amount of the liquid supplied to the liquid-supplied part by the liquid-free detection signal, The display means displays the liquid supply time and the liquid supply amount.

Then, when the liquid is supplied to the liquid-supplied part by a predetermined amount, the liquid supply to the liquid-supplied part is intermittently calculated by the calculating means based on the liquid-free detection signal of the liquid detection mechanism,
The liquid delivery switching mechanism is switched again via the control mechanism, the liquid delivery mechanism communicates with the liquid detection mechanism via the liquid delivery switching mechanism, and at the same time, the communication between the liquid delivery mechanism and the liquid supply section is cut off. Then, the liquid detection mechanism detects the flow of the liquid, and thereafter repeats the series of operations. That is, after automatically feeding a predetermined amount of liquid to the liquid-supplied part, the liquid feeding is stopped for an intermittent time of the liquid supply,
A predetermined amount of liquid is again sent to the liquid receiving part, and this is repeated,
During that time, the liquid supply time to the liquid receiving part, the intermittent supply time,
The display means displays the supply amount.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 shows a cardioplegia solution circulation circuit, and FIG.
The figure shows a cardioplegia solution supply circuit. In the drawings, reference numeral 1 denotes a cardioplegia solution reservoir, and an inflow port 2 is provided at an upper part of the cardioplegia solution reservoir (hereinafter simply referred to as a reservoir) 1 and an outflow port 3 is provided at a lower part thereof. The myocardial protection liquid 4 is made to flow into the reservoir 1 from the inflow port 2 and is stored therein.

The cardioplegic solution (perfusate) 4 in the reservoir 1 flows out from the outlet 3, and the roller pump (liquid feeding mechanism) 6 flows into the port 7a of the switching valve (liquid feeding switching mechanism) 7 via the pipe 5, Further, the port 7b in which the ports 7a and 7b are in communication with each other (the ports 7a and 7b of the switching valve 7 are in communication with each other,
It is possible to switch between non-communication. ) From the upper portion of the switching valve 7 into the drip chamber (a component of the liquid detection mechanism) 9 through the pipe 8 and the drip chamber 9
In the drip state, it is stored in the lower part of the drip chamber 9, flows out from the lower part of the drip chamber 9, flows into the reservoir 1 from the inflow port 2 of the reservoir 1 through the pipe 10, and is stored in the reservoir 1 and circulated. It is supposed to do.

When the switching valve 7 is switched from the state in which the port 7a and the port 7b in FIG. 1 are in communication with each other, the port 7 is switched to the port 7 as shown in FIG.
The communication between a and the port 7b is cut off so that the port 7a and the port 7c communicate with each other.

The drip chamber 9 is formed of a transparent container, and an optical sensor (a part of the liquid detection mechanism) 11 is attached to the outer circumference of the side wall of the drip chamber 9, and the optical sensor 11 prevents the drip (that is, the liquid flow) from occurring. Presence / absence is detected.

Further, 12 is a controller (control mechanism) of the microcomputer, and this controller 12 is, as shown in FIG. 3, a CPU (central processing unit) 1 for controlling each section of the apparatus.
7, a ROM 18 in which a control program used in the CPU 17 is stored, and an RA for temporarily storing data.
M19, CPU 17, each part of the apparatus (roller pump 6, optical sensor 11, supply time timer 15, supply intermittent time timer (liquid supply intermittent time timer) 16, display device 1
3, interface 14 to connect to the recorder 14)
It is composed of 0, 21, 22, 23, 24 and 25.
Based on the output signal from the optical sensor 11, the controller 12 having the above-described configuration detects the supply of the cardioplegia solution 4 to the coronary artery (the liquid receiving part), and outputs the output signals of the supply time timer 15 and the supply intermittent time timer 16. Based on the above, the supply time, the supply amount, the supply intermittent time, etc. of the cardioplegia solution to the coronary arteries are displayed on the display device 13, and these are recorded in the recorder 14.

Next, the operation of the circulation circuit of the cardioplegia solution 4 and the supply circuit to the coronary artery will be described with reference to the flow charts shown in FIGS. 1 to 3 and 4.

The myocardial protection liquid 4 is stored in the myocardial protection liquid reservoir 1, and the port 7a and the port 7b of the switching valve 7 communicate with each other.
When the power is turned on in the state shown in FIG. 1 in which the communication between a and the port 7c is cut off, the roller pump 6 starts, the myocardial protection solution 4 circulates in the circulation circuit, and the myocardial protection solution 4 enters the drip chamber 9. The optical sensor 11 detects the flow of the liquid and the liquid is in a drip state.

Further, as shown in FIG. 2, the switching valve 7 is switched, the communication between the port 7a and the port 7b is cut off, and the port 7a
And the port 7c are in communication with each other, the myocardial protection liquid 4 is supplied from the myocardial protection liquid reservoir 1 to the coronary arteries via the switching valve 7, and the myocardial protection liquid 4 does not flow into the drip chamber 9. The optical sensor 11 cannot detect the flow.

In addition, supply time timer 15, supply intermittent time timer 1
When the set time of 6 has elapsed, the switching signal 7 is switched each time by the output signal thereof.

SP1; When the power is turned on, the roller pump 6 is started, and it is judged by the optical sensor 11 whether or not the flow of the cardioplegia solution 4 is detected, and when this flow is not detected (the state shown in FIG. 2). Advances to SP2.

SP2: The switching valve 7 is in a state where the communication between the port 7a and the port 7b is cut off, the port 7a and the port 7c are in communication, and the myocardial protection liquid 4 is supplied to the coronary artery.

SP3: The cardioplegic solution supply intermittent time timer 16 is stopped, and the process proceeds to SP4.

SP4: Cardioplegia solution supply time timer 15 when the cardioplegia solution supply intermittent time timer 16 is stopped
Is started, and thereafter, the myocardial protection liquid is supplied to the coronary arteries for the set time of the myocardial protection liquid supply time timer 15, and the supply time of the myocardial protection liquid is displayed by the display device 13.

SP5: The integrated supply amount of the cardioplegia solution 4 supplied over time is calculated and displayed on the display device 13, SP1
Returning to step 1, the optical sensor 11 determines whether or not there is a flow of the cardioplegic solution 4, and when the flow of the cardioplegic solution 4 is detected by the optical sensor 11, the process proceeds to SP6.

SP6: When the supply time timer 15 of the cardioplegia solution 4 has passed the set time, it is brought into a stopped state.

SP7: The set time of the supply time timer 15 has elapsed, the switching valve 7 is switched by the output signal, and as shown in FIG. 1, the communication between the ports 7a and 7c is cut off so that the ports 7a and 7bb communicate with each other. Then, the cardioplegia solution 4 circulates in the cardioplegia solution circulation circuit shown in FIG.
The optical sensor 11 detects the drip flow inside.

SP8: Based on the detection signal of the optical sensor 11, the total supply amount up to that point is stored in the recorder 14.

SP9: The supply intermittent time timer 16 starts at the same time as the supply time timer 15 stops, the supply intermittent time is displayed by the display device 13, and the supply intermittent time timer 16
When the set time of is elapsed, the process returns to SP1 and the above operation is repeated.

The myocardial protection liquid 4 that has flowed into the myocardial protection liquid reservoir 1 from the inflow port 2 mainly flows down near the inner wall of the myocardial protection liquid reservoir 1 and is stored in the myocardial protection liquid reservoir 1. It is cooled to an appropriate temperature by a heat exchanger (not shown) provided in the inner and lower parts of the No. 1 and is supplied to the coronary arteries when the myocardial protection liquid is supplied as described above.

As described above, according to the present embodiment, the cardioplegia solution can be automatically supplied to the coronary artery with a predetermined supply intermittent time and a predetermined supply time. Moreover, in this case, the supply time, the supply intermittent time, and the supply amount of the liquid can be accurately measured and supplied to the coronary artery.

Although the flow path of the cardioplegia solution 4 is switched by the switching valve 7 shown in FIGS. 1 and 2 in the above embodiment, the invention is not limited to this, and switching by a three-way stopcock, turning on the electrical switch, When turned off, the flow path of the cardioplegia solution 4 may be electrically switched to either the cardioplegia solution circulation circuit or the cardioplegia solution supply circuit, or may be switched by another switching means without departing from the gist of the present invention. Of course, of course.

According to the present invention, the reservoir, the liquid feeding mechanism, the liquid feeding switching mechanism,
A liquid detection mechanism, the reservoir is sequentially connected through a flow path,
Controlling the liquid supply from the liquid supply mechanism to any of the liquid supply part connected to the liquid supply switching mechanism and the liquid detection mechanism based on the liquid detection signal and the liquid-free detection signal of the liquid detection mechanism A liquid supply time to the liquid receiving part based on the liquid non-detection signal and the liquid detection signal of the liquid detection mechanism is made possible by intermittently switching the liquid supply by the liquid supply switching mechanism via the mechanism. Since it has a calculation means for calculating the supply intermittent time and the supply amount and a display means for displaying the supply time, the supply intermittent time and the supply amount of the liquid, a predetermined amount is automatically sent to the liquid receiving portion. After that, the liquid supply is stopped for the intermittent supply time, the predetermined amount is again supplied to the liquid receiving part, and this process can be repeated. During that time, the liquid supply time, the intermittent supply time, the supply to the liquid receiving part The quantity can be calculated by the calculation means and displayed by the display means. Kill.

Therefore, when the present invention is applied to supply the cardioplegic solution to the coronary arteries, the myocardial protective solution is automatically supplied to the coronary arteries by automatically setting the predetermined supply intermittent time and the predetermined supply time. Can be supplied. Moreover, in this case, the supply time, the supply intermittent time, and the supply amount can be calculated and displayed.

With this, it is possible to eliminate the troublesome work of reading the scale of the conventional reservoir and save labor.
Further, it is possible to prevent a delay in the operation of setting the supply time of the cardioplegia solution and the intermittent supply time of the cardioplegia solution due to a measurement error due to the degree of roughness of the scale or a reading error, and remove a heavy burden on the operator of the cardioplegia solution supply.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention.
FIG. 1 is a cardioplegic solution circulation circuit diagram, FIG. 2 is a cardioplegic solution supply circuit diagram, FIG. 3 is a diagram showing an electrical configuration of a controller, and FIG. 4 is a flowchart showing an operation. 1 ... Cardioplegia solution reservoir, 6 ... Roller pump (liquid delivery mechanism), 7 ... Switching valve (liquid delivery switching mechanism), 9 ... Drip chamber (solution detection mechanism component), 11 ... Optical sensor ( Liquid detection mechanism component), 12 ... Controller (control mechanism), 13 ... Display device.

Claims (1)

[Scope of utility model registration request] 1. A reservoir, a liquid feed mechanism, a liquid feed switching mechanism, a liquid detection mechanism, and the reservoir are sequentially connected via a flow path, and liquid fed from the liquid feed mechanism is connected to the liquid feed switching mechanism. To either the liquid receiving part or the liquid detection mechanism, which enables intermittent liquid transfer by the liquid transfer switching mechanism via the control mechanism based on the liquid detection signal and liquid-free detection signal of the liquid detection mechanism. , The liquid supply time of the liquid to the liquid receiving part based on the liquid detection signal of the liquid detection mechanism, the liquid detection signal of the liquid detection mechanism, the intermittent supply time, the supply means of calculating the supply amount An automatic liquid supply device characterized by having display means for displaying intermittent supply time and supply amount.