JPH10127656A - Cauterization hemostatis apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to shorten the time for water suction and drainage work at the time of using a pump capable of feeding a high-pressure liquid and to prevent the deterioration of a pump by idling with a cauterization hemostatis apparatus. SOLUTION: This cauterization hemostatis apparatus has a liquid feeding means which feeds the liquid from the front end of a probe via the inside of the sheath of a cauterization probe. This liquid feeding means is constituted to have a power source section 3 which supplies prescribed electric power to a motor 2 for driving the pump 1 for liquid feeding, an electric power detecting section 4 which detects the electric power to be supplied to the motor 2 and a control section 5 which sends an instruction to this power source section 3 in accordance with the detection result of this electric power detecting section 4 and controls the electric power to be supplied to the motor 2. This control section detects whether the idling or the liquid feeding by utilizing the characteristic that the electric power consumption of the motor 2 is changed by a load change. The control section controls the pump 1 and the motor 2 in a region of a high number of revolutions of an air feed capacity at the time of the idling and controls the driving of the pump 1 so as to stop the driving when the idle running continues for more than the specified time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cautery hemostasis device having a pumping function.

[0002]

2. Description of the Related Art In recent years, endoscopes have been widely used which allow a diagnosis or a medical treatment in a body cavity by inserting an elongated insertion portion into the body cavity without requiring an incision from the body surface. The endoscope is generally provided with a hollow channel through which various treatment tools are inserted in addition to the observation means. Through the channel, the treatment tool (corresponding to a symptom in a body cavity) is inserted. Various medical treatments can be performed under visual observation by an operator using the tool.

[0003] By the way, a wound from which a tumor or the like in a body cavity is resected or a wound such as an ulcer is generally accompanied by bleeding. Is going. In order to perform such ablation hemostasis, an ablation hemostasis device having a liquid sending function is used.

[0004] The blood at the treatment site may be coagulated, and it is necessary to send the liquid vigorously to blow it off. For this purpose, an elongate sheath having a small nozzle attached to the distal end thereof may be provided in the liquid sending means of the cautery hemostasis device, and the liquid may be sent at a high pressure. A pump with a high discharge pressure, such as a piston pump or a diaphragm pump, is often used to forcefully feed liquid from a very small nozzle at the distal end of the sheath. This type of pump requires an operation of forcibly filling the inside of the pump with liquid, which is generally called priming before use.

[0005] However, performing the priming with a syringe, for example, may cause troubles such as complicating the work process, and also from the viewpoint of preventing infection by bacteria and viruses peculiar to the medical field. Is not preferred.

[0006]

As described above, the conventional ablation hemostasis apparatus uses a piston pump, a diaphragm pump, or the like to send a high-pressure liquid. When the priming is performed by a syringe, there is a problem that the operation process is complicated. On the other hand, when priming is performed by idling the pump, the working time of priming is not reduced simply by increasing the movement speed of the piston in the case of a piston pump, for example, due to the performance of the check valve. Further, it is not preferable to perform the high-speed operation for a long time from the viewpoint of the durability of the pump.

[0007] The present invention has been made in view of these circumstances, and can reduce the time required for water absorption and drainage when using a pump capable of supplying high pressure liquid, and prevent deterioration of the pump due to idle operation. It is an object of the present invention to provide a cautery hemostasis device capable of performing the ablation.

[0008]

A cautery hemostasis device according to the present invention comprises a cautery probe which has a cauterizing means at a distal end of an elongated sheath which can be inserted into a treatment tool channel of an endoscope or the like;
A cautery hemostasis device having liquid supply means capable of supplying liquid from a spout at the tip of the probe through a liquid supply passage formed in the sheath of the cauterization probe, and driving a pump for supplying liquid to the liquid supply passage. A pump driving motor, a motor driving unit for supplying a predetermined electric power to the pump driving motor, an idle operation detecting unit for detecting an idle operation state of the pump, and outputting a set value of the supplied electric power to the motor driving unit. Power setting means to perform, based on the output of the idle operation detection means,
A drive control unit that drives the pump in a predetermined rotation speed range having a high air supply capacity in an idle operation state, and a pump forcibly when the idle operation state continues for a predetermined time or more based on an output of the idle operation detection unit. And a pump forcibly stopping means for turning off.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, a schematic configuration of an embodiment of the present invention will be described with reference to FIG. The liquid supply system provided in the cauterization device includes a pump 1 for sending a physiological saline solution, a motor 2 for driving the pump 1, a power supply unit 3 as a motor drive unit for supplying electric power to the motor 2, and a motor 2. Power detection unit 4 having a function of idle operation detection means for detecting power supplied to power supply unit 3, and power supply unit 3 based on the detection result of power detection unit 4.
And a control unit 5 having a function of a power setting unit for controlling the power supplied to the motor 2 by sending an instruction to the motor 2 and a pump forcible stop unit. As the pump 1, a pump having a high discharge pressure, for example, a piston pump, a diaphragm pump, or the like is used. In such a pump, the operation of forcibly filling the inside of the pump called a priming water with a liquid before use causes the pump to run idle. This is done by:

When the pump 1 is idling and when the liquid is supplied, the power supplied to the motor 2 changes because the load on the motor 2 changes. The control unit 5 determines that the engine is idling when the power value becomes lower than a known power value from the performances of the pump 1 and the motor 2 and increases the power supplied to the motor 2 so that the pump 1 and the motor 2 have a predetermined high air supply capacity. The power supply unit 3 is controlled so as to be in the rotation speed range. This predetermined rotation speed range is a rotation speed value at which the air supply capacity can be increased, which can be determined in advance based on the performance of the pump 1 and the motor 2. Further, the control unit 5 controls the power supply unit 3 so as to stop supplying power to the motor 2 when the idle operation continues for a certain time. Further, the control unit 5 determines that the liquid supply is performed when the electric power value becomes equal to or more than a known electric power value from the performance of the pump 1 and the motor 2 during the idle operation, and shifts to the normal control of the motor 2.

As described above, by utilizing the characteristic that the power consumption of the motor 2 changes due to the load change, it is detected whether the pump 1 is idling or liquid feeding. By controlling the motor 2 and forcibly stopping the driving of the pump 1 when the idle operation continues for a certain period of time or more, quick priming is possible, the deterioration of the pump is small, and the piston pump is used. When used, the pump can be controlled with less risk of seizure.

Next, the configuration of the embodiment of the present invention will be described in more detail.

FIGS. 2 to 5 relate to a first embodiment of the present invention, and FIG. 2 is a perspective view showing an external configuration of an ablation hemostasis device.
3 is a longitudinal sectional view showing the configuration of the distal end portion of the cautery probe, FIG. 4 is a sectional view taken along line AA of FIG. 3, and FIG. 5 is a circuit diagram showing a circuit configuration of a control unit of the cautery hemostasis device.

The cautery hemostasis device 11 of the present embodiment includes a main body 13 having an operation panel 12 on the front side,
A cauterization probe 16 detachably connected to an electric connector 14 and a liquid feed connector 15, and a foot switch 19 detachably attached to the main body 13 via a cable 17 at a connector 18 at the end of the cable 17. And a cleaning liquid tank 2 detachably attached to a side surface of the main body 13.
0.

The foot switch 19 is provided with a liquid sending switch 19a for instructing liquid sending and a heating switch 19b for instructing heating.

The cauterizing probe 16 comprises an elongated and flexible sheath 21, a cauterizing tip 22 connected to the distal end of the sheath 21, and the electric connector 14 and the liquid feed connector provided on the base side of the sheath 21. The sheath 21 and the cautery tip 22 at the distal end thereof can be inserted into a treatment tool channel of an endoscope (not shown), and the cautery tip 22 can be introduced into a body cavity through this channel.

As shown in FIG. 3, a coaxial cable 31 is inserted through the sheath 21 at the center in the axial direction so as to supply current to a resistor 32 constituting a heating element provided inside the cauterizing tip 22 at the distal end. (See FIG. 4) formed along the outer peripheral axis of the coaxial cable 31 in the sheath 21 for supplying a plurality of nozzles 33, 33,... Is formed.
The cleaning liquid sent through the liquid sending pipe 34 is jetted out by the plurality of nozzles 33 and sent.

The configuration of the control section of the cautery hemostasis device 11 will be described with reference to FIG. A circuit board on which a control circuit shown in FIG. 5 is mounted is provided inside the cauterization hemostasis device 11.

A power supply circuit 41 based on a known constant voltage power supply applies a voltage V to the motor 2 in accordance with a signal from a voltage setting circuit 42 composed of a trimmer 51 and a fixed resistor. The trimmer 51 sets a voltage to be supplied to the motor 2.

The current flowing through the motor 2 is detected by a current detection circuit 43
The comparator 44 compares the output of the current detection circuit 43 with the set value of the voltage setting circuit 42. When the output of the current detection circuit 43 is large, the output of the comparator 44 becomes high level (hereinafter, referred to as H level), the photocoupler 52 is turned on, and the voltage set by the trimmer 51 is applied to the motor 2. You. When the output of the current detection circuit 43 is small, the output of the comparator 44 becomes low level (hereinafter referred to as L level), the photocoupler 53 is turned on, and the voltage preset by the fixed resistor 2 is applied. The value set by the fixed resistor is determined based on the supply voltage to the motor 2 in the range of the rotation speed where the air supply capacity is high from the performance of the pump 1 and is set to this voltage value.

When the output of the comparator 44 becomes L level, the operation of the timer circuit 45 comprising the general-purpose timer 53 and the flip-flop 54 is started.
Is reset to H level, this timer circuit 45 is reset. When the general-purpose timer 53 continues the timer operation for a time determined by the time constant of the resistor and the capacitor (the upper limit of the continuous operation time of the idling operation), the general-purpose timer 53 outputs an L level to the flip-flop 54, whereby the flip-flop 54 Outputs H level.

The output of the flip-flop 54 and the operation signal of the liquid feed switch 55 including the liquid feed switch 19a of the foot switch 19 and the like are input to the flip-flop 56, and the output thereof is passed through photocouplers 57 and 58. The power supply circuit 41 and the comparator 44 are controlled. Here, when the output of the flip-flop 54 becomes H level, the flip-flop 56 becomes L while the liquid sending switch 55 is on.
The level is output, whereby the photocouplers 57 and 58 are turned on, and the power supply to the motor 2 is stopped. As can be seen from the above operation, the forced stop of the pump 1 is released by turning off the liquid supply switch 55.

The output of the flip-flop 54 and the operation signal of the liquid feed switch 55 are logically operated by a NOR circuit 59, and the output of the NOR circuit 59 is
61 is controlled. Here, when the flip-flop 54 outputs the L level and the liquid supply switch 55 is turned on, the photocouplers 60 and 61 are turned off, and power is supplied to the motor 2.

When the pump 1 is forcibly stopped, a warning means such as a buzzer may be used to notify the user of an abnormality indicating that idle operation has continued for a predetermined time or more.

As described above, in the present embodiment, the current supplied to the motor 2 is detected by the current detection circuit 43 and is compared with the set value of the voltage setting circuit 42 by the comparator 44, so that the load of the motor 2 is detected. To determine whether it is in the idling state or the liquid feeding state. If the supply power detection value is smaller than the set value, it is determined that the pump 1 is running idle. In this case, the supply power to the motor 2 is reduced so that the pump 1 is driven in a rotation speed range where the air supply capacity is high. Control. Further, the continuation time of the idle operation is measured by the timer circuit 45, and when the idle operation has continued for a certain time, the power supply to the motor 2 is stopped. Further, when the supply power detection value is larger than the set value, the trimmer 51
Is supplied to the motor 2 to shift to the liquid sending state.

According to the first embodiment, when the pump 1 is idling, the motor 2 is controlled so that the pump 1 is driven in a rotation speed region having a high air supply capacity. The state can be quickly shifted to the liquid sending state, and quick priming is possible and the water absorption / drainage process time is shortened. In addition, the operation of the pump 1 is stopped when the idle operation continues for a certain period of time by the timer operation by the timer circuit 45. Therefore, even when a piston pump is used, seizure due to long idling can be prevented. Accordingly, it is possible to provide a cautery hemostasis device that can be used immediately even in an emergency use.

FIG. 6 is a block diagram showing the configuration of the control unit of the cautery hemostasis device according to the second embodiment of the present invention.

In the first embodiment, the idling state is detected from the relationship between the supply voltage and the current to the motor 2. However, in the second embodiment, the supply voltage to the motor 2 and the tachometer 70 attached to the motor 2 are detected. It is configured to detect the idle operation state from the relationship with the output.

The control section of this embodiment includes a tachometer 70 for detecting the number of revolutions of the motor 2 for driving the pump 1 and an output conversion circuit 71 for converting the output of the tachometer 70 to a voltage value.
And a voltage setting circuit 72 for setting a supply voltage to the motor 2
A power supply circuit 73 for supplying power to the motor 2 based on a control signal from the voltage setting circuit 72; a voltage detection circuit 74 for detecting a supply voltage to the motor 2; The circuit includes a comparator 75 that compares the set value with the circuit 72 and a timer circuit 76 that measures the duration of the idle operation state of the pump 1. That is, the configuration is such that the tachometer 70 and the output conversion circuit 71 are used instead of the current detection circuit 43 of the first embodiment.

An output from the tachometer 70 is input to a voltage setting circuit 72 via an output conversion circuit 71. The voltage setting circuit 72 sends a control signal to the power supply circuit 73 so that the speed setting value input from an external operation panel or the like and the output value from the output conversion circuit 71 become the same.
The power supply circuit 73 supplies power to the motor 2 based on a control signal from the power supply circuit 73. At this time, the voltage setting circuit 72 outputs a control signal for driving the motor 2 to the power supply circuit 73 when the signal is on based on a pump on / off signal input from an external operation switch or the like. It is supposed to.

At this time, the voltage applied to the motor 2 is measured by a voltage detection circuit 74, and the detected value is compared with the voltage setting circuit 7
The comparator 75 compares the set value of the control signal output from 2 with the control signal output to the power supply circuit 73. If the detected value is smaller, the comparator 75 outputs the L level. Voltage setting circuit 7
When detecting the L level output from the comparator 75, the control signal 2 outputs a control signal to the power supply circuit 73 so that the rotation speed becomes the highest in the air supply capacity known from the performance of the pump 1. When the detected value is larger, the comparator 75 outputs H
The level is output, and the voltage setting circuit 72
When the H level is detected from the output of No. 5, the motor 2 is controlled so that the number of revolutions becomes in accordance with the speed set value inputted from the outside.

The output of the comparator 75 is a timer circuit 76
And the duration of the idle operation is measured in the same manner as in the first embodiment. At this time, when the externally input pump on / off signal is on,
While the idle operation state continues, that is, while the output of the comparator 75 is at the L level, the timer operation is activated. When the idle operation state continues for a predetermined time or more, for example, an H level or the like is output to the voltage setting circuit 72. . The voltage setting circuit 72 includes a timer circuit 7
6 and outputs a control signal to the power supply circuit 73 so as to forcibly stop the motor 2. The forced stop of the pump 1 is released when the pump on / off signal is turned off.

As described above, in the second embodiment, in addition to the operation and effect of the first embodiment, the operation of the pump 1 is controlled at a constant rotation speed based on the output of the tachometer 70.
It is possible to control the pump with higher precision, and by setting the rotation speed at the time of idling to an appropriate speed, it is possible to realize quicker water absorption / drainage work.

FIG. 7 is a configuration explanatory view showing the configuration of the main part of the cautery hemostasis device according to the third embodiment of the present invention.

The third embodiment is an example of a configuration in which a liquid sensing device is provided in a fluid pipe to determine whether or not a pump is in an idle state.

A plurality of liquid sensing devices 82, 82,... Are provided in a fluid line 81 connected to the pump 80.
A detection circuit 83 connected to these liquid sensing devices 82 for detecting the presence or absence of liquid in the fluid conduit 81;
And a control unit 84 that determines whether or not the pump 80 is idle based on the output of the control unit 3 and controls the operation of the pump 80.

The state inside the fluid line 81 is detected by the liquid sensing device 82, and it is possible to determine whether the inside of the fluid line 81 is air or liquid based on the output value of the liquid sensing device 82. When an output indicating that the inside of the pipeline is air is input from the liquid sensing device 82, a signal for instructing the pump 80 to perform idle operation control is output to the control unit 84. Further, when an output indicating that the inside of the pipe is liquid is input from the liquid sensing device 82, a signal instructing to perform a normal liquid supply control is output to the control unit 84.

When the idle operation control is performed based on the output signal from the detection circuit 83, the control section 84 shifts from the performance of the pump 80 to the rotation speed range where the air supply capacity is high as in the first embodiment. The drive of the motor is controlled so that
0 operation is controlled. In addition, when performing normal liquid supply control, the motor is driven and controlled so that the liquid supply amount is set in advance, and the operation of the pump 80 during liquid supply is controlled.

The liquid sensing device 82 is of an optical type,
A non-contact type, such as an electromagnetic type, which detects the presence or absence of a liquid in a pipeline by light or electromagnetic waves is desirable.

Also, in this embodiment, by installing the liquid sensing devices 82, 82,... In the fluid conduit 81 at appropriate intervals up to the vicinity of the tank 85, the output of these liquid sensing devices 82 can be used to feed the actual pump. Air velocity can be measured. In other words, when absorbing water, the liquid surface that becomes liquid from air moves in the pipeline, and this movement of the liquid surface is detected by the liquid sensing device 8.
., And the air supply speed can be detected from the movement time of the liquid surface and the installation interval (distance) of the liquid sensing device 82.
On the basis of this information, idle operation at the rotation speed with the highest air supply speed can be realized.

As described above, in the third embodiment, the pump 8
Since zero is actually detected as to whether or not there is a liquid in the pipeline, it is possible to perform more reliable control during the idle operation and during the liquid feeding. In addition, by disposing the liquid sensing device 82 in the fluid conduit 81 to the vicinity of the tank at an appropriate interval, the change with time of the pump 80 and the resistance of the conduit of the liquid supply conduit 34 in the ablation probe 16 provided on the discharge side. Irrespective of the variation, the actual air supply speed of the pump can be measured and set to an appropriate state, and the water absorption / drainage work can be performed at the rotation speed with the highest air supply capability.

In order to simplify the setting operation before using the cautery hemostasis device, as shown in FIGS. 8 and 9, a commercially available liquid pack 90 of physiological saline is connected to the liquid supply line 94. It is also conceivable to use a configuration in which the pressure is directly applied and the liquid is directly sent to the cautery probe 91.

In this configuration example, as shown in FIG. 9, the liquid pack 90 is pressed by a pressurizing device 92 such as a solenoid provided in an apparatus housing 95, and the physiological saline in the pack is cauterized with a cauterizing probe 91. Through the nozzle 93 at the tip of the probe.

As in this configuration example, a commercially available liquid pack 90
By using the method, since the physiological saline is already sterilized or the like so as not to be infected by bacteria or the like, it becomes possible to use the cauterization device immediately even in an emergency.

According to each of the above-described embodiments, the function of detecting the idling state of the pump and driving the pump in the rotation speed region having a high air supply capacity during the idling operation is performed, and the idling operation is continuously performed for a predetermined time or more. The function is combined with the function of automatically stopping the pump when it is performed, so that the deterioration of the pump can be prevented, the risk of seizure when using a piston pump is reduced, and Since drainage work can be realized, setting work can be performed quickly even in an emergency,
An ablation hemostasis device with less failure can be provided.

[Supplementary Notes] (1) Through an ablation probe that can be inserted into a treatment tool channel of an endoscope and has an ablation means at the distal end of an elongated sheath, and a liquid feed passage formed in a sheath of the ablation probe A cautery hemostasis device having a liquid sending means capable of sending a liquid from an ejection port at a probe tip, wherein a pump driving motor that drives a pump that sends a liquid to the liquid sending passage; Motor driving means for supplying the electric power of the pump, idling operation detecting means for detecting an idling state of the pump, electric power setting means for outputting a set value of supplied electric power to the motor driving means, and output of the idling operation detecting means A driving control means for driving a pump in a predetermined rotation speed range having a high air supply capacity in an idle operation state, and a case where the idle operation state has continued for a predetermined time or more based on an output of the idle operation detection means. A pump forcible stop means for turning off the forced pump,
An ablation hemostasis device comprising:

(2) The idling operation detecting means includes a supply electric power measuring means for measuring electric power supplied to the pump driving motor, and compares the measured electric power value with a predetermined value to determine whether the idling operation state is established. 2. The cautery hemostasis device according to claim 1, further comprising a comparing means for judging whether the cauterization is performed.

(3) The idling operation detecting means determines whether or not the idling state is based on an output signal from a liquid detecting means provided in a water supply conduit communicating with the liquid supply passage of the cauterization probe. The cauterization hemostasis device according to claim 1.

(4) The cauterization according to appendix 1, wherein the idling operation detecting means judges whether the pump is idling based on an output signal from a rotational speed detecting means for detecting a rotational speed of the pump driving motor. Hemostatic device.

(5) The power setting means receives the output signal of the idling operation detection means and outputs an appropriate power setting value known in terms of the performance of the pump to the motor driving means. 2. The cautery hemostasis device according to 1.

(6) When the idling state is detected by the idling state detecting means, the power setting means sets the pump driving motor in a rotation range having a high air supply capacity known from the performance of the pump. Appendix 5 wherein a set power value to be driven is output to the motor driving means.
The cauterization hemostasis device according to claim 1.

(7) The pump forcible stop means receives the output signal of the idling operation detecting means, and outputs a motor stop signal to the motor drive means after a lapse of time which is known from the viewpoint of the durability of the pump. The cautery hemostasis device according to Supplementary Note 1.

[0053]

As described above, according to the present invention, it is possible to shorten the time required for water absorption / drainage when using a pump capable of supplying a high pressure liquid, and to prevent deterioration of the pump due to idling. There is a possible effect.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing an external configuration of an ablation hemostasis device according to an embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing a configuration of a tip portion of the ablation probe.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a circuit diagram showing a circuit configuration of a control unit of the cautery hemostasis device according to the first embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a control unit of the ablation hemostasis device according to the second embodiment of the present invention.

FIG. 7 is a configuration explanatory view showing a configuration of a main part of an ablation hemostasis device according to a third embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a configuration example in which a commercially available saline pack is connected to a cautery probe and used.

FIG. 9 is an explanatory diagram showing a configuration example of a pressurizing device for compressing a physiological saline pack and sending liquid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pump 2 ... Motor 3 ... Power supply part 4 ... Power detection part 5 ... Control part 16 ... Cautery probe 41 ... Power supply circuit 42 ... Voltage setting circuit 43 ... Current detection circuit 44 ... Comparator 45 ... Timer circuit 55 ... Liquid sending switch

Claims (1)

[Claims] An ablation probe which can be inserted into a treatment tool channel or the like of an endoscope and has ablation means at a distal end of an elongated sheath, and a probe passage through a liquid supply passage formed in a sheath of the ablation probe. A cautery hemostasis device having a liquid sending means capable of sending a liquid from an ejection port, comprising: a pump driving motor that drives a pump that sends a liquid to the liquid sending passage; and supplying predetermined electric power to the pump driving motor. A motor driving means for detecting an idle operation state of the pump; a power setting means for outputting a set value of supply power to the motor driving means; In an operation state, a drive control unit that drives a pump in a predetermined rotation speed region having a high air supply capacity, based on an output of the idle operation detection unit, forcibly when the idle operation state continues for a predetermined time or more. A cautery hemostasis device, comprising: a pump forcible stop means for turning off a pump.