Medical liquid supply device

1. A medical liquid supply device comprising:

a liquid supply path, the liquid supply path having a distal end to which a liquid is supplied;

a suction path, the suction path having a distal end through which a material is suctioned;

a liquid supply driver which is configured to supply the liquid via the liquid supply path when being driven;

a suction driver which is configured to perform suction via the suction path when being driven;

a communication path having a first end which is communicated with the liquid supply path at a position between the liquid supply driver and the distal end of the liquid supply path, and having a second end which is communicated with the suction path at a position between the suction driver and the distal end of the suction path;

a liquid supply mode input that is configured to select a liquid-supply ON mode in which the liquid is supplied from the distal end of the liquid supply path; and

a control unit which is configured to control the liquid supply driver and the suction driver in accordance with whether the liquid-supply ON mode is selected,

the control unit being configured to control the liquid supply driver to supply liquid such that liquid flows from the liquid supply driver in the liquid supply path regardless of whether the liquid-supply ON mode is selected,

the control unit being configured to control the liquid supply driver and the suction driver such that all the liquid that flows from the liquid supply driver flows into the communication path and is suctioned by the suction driver through the suction path when the liquid-supply ON mode is not selected, and

the control unit being configured to control the liquid supply driver and the suction driver such that at least a part of the liquid that flows from the liquid supply driver does not flow into the communication path and is supplied from the distal end of the liquid supply path when the liquid-supply ON mode is selected.

2. The medical liquid supply device according to claim 1 , wherein the control unit is configured to control an amount of suction by the suction driver so that a first suction amount when the liquid-supply ON mode is not selected is greater than a second suction amount when the liquid-supply ON mode is selected.

3. The medical liquid supply device according to claim 2 , further comprising a suction mode input configured to select a suction mode in which the material is suctioned through the distal end of the suction path when the liquid-supply ON mode is not selected, wherein

the control unit is configured to control the amount of suction by the suction driver in accordance with whether the suction mode is selected,

the control unit is configured to adjust a suction force at the distal end of the suction path by controlling the amount of suction of the suction driver,

when the suction mode is selected, the control unit is configured to adjust the suction amount of the suction driver to a third suction amount which is greater than the first suction amount and the second suction amount.

4. The medical liquid supply device according to claim 2 , further comprising a liquid supply amount input configured to input an amount of the liquid supplied from the distal end of the liquid supply path when the liquid-supply ON mode is selected,

wherein the control unit is configured to control the amount of suction by the suction driver in accordance with an input from the liquid supply amount input so that a flow amount of the liquid that flows from the liquid supply path into the communication path is adjusted so as to adjust the amount of liquid supplied from the distal end of the liquid supply path.

5. The medical liquid supply device according to claim 2 , further comprising a liquid supply amount input configured to input a liquid supply amount from the distal end of the liquid supply path when the liquid-supply ON mode is selected, wherein

in the liquid-supply ON mode, the control unit is configured to set the amount of suction by the suction driver to a second suction amount that is less than a first suction amount when the liquid-supply ON mode is not selected, the second suction amount being a constant suction amount,

the control unit is configured to control the flow amount from the liquid supply unit within a range greater than or equal to a flow amount when the liquid-supply ON mode is not selected, the flow amount being controlled in accordance with an input in the liquid supply amount input, adjusting the amount of liquid supplied from the distal end of the liquid supply path.

6. The medical liquid supply device according to claim 1 , further comprising:

an energy transmitter in which the suction path is defined along a longitudinal axis, and which is configured to transmit treatment energy including at least one of a high-frequency current and ultrasonic vibrations from a proximal end to a distal end; and

a sheath through which the energy transmitter is inserted, and which defines the liquid supply path along the longitudinal axis between the energy transmitter and thereof,

wherein the communication path is provided in a part of the energy transmitter proximally from a distal end of the sheath, and

in the liquid-supply ON mode, the control unit is configured to control the amount of suction by the suction unit to adjust the flow amount of the liquid flowing from the liquid supply path into the suction path via the communication path between a first liquid supply mode and a second liquid supply mode, a liquid supply amount from a distal end of the liquid supply path being greater in the second liquid supply mode than in the first liquid supply mode.

7. The medical liquid supply device according to claim 6 , further comprising:

an energy supply unit configured to supply the treatment energy transmitted by the energy transmitter; and

an energy mode input section configured to switch an energy mode of the treatment energy supplied from the energy supply unit,

wherein the control unit is configured to control the amount of suction by the suction unit between the first liquid supply mode and the second liquid supply mode in accordance with a switching operation in the energy mode input section.

8. The medical liquid supply device according to claim 7 , wherein the energy supply unit includes a high-frequency energy supplier configured to supply the high-frequency current as the treatment energy,

the energy mode input section includes a high-frequency energy switch configured to switch the energy mode of the energy supply unit to a first energy mode in which the energy transmitter transmits the high-frequency current supplied from the high-frequency energy supplier or to a second energy mode in which the high-frequency current is not supplied from the high-frequency energy supplier, and

the control unit is configured to control the amount of suction by the suction unit in accordance with a switching operation in the high-frequency energy switch so that the first liquid supply mode is set when the energy mode is switched to the first energy mode by the high-frequency energy switch and so that the second liquid supply mode is set when the energy mode is switched to the second energy mode by the high-frequency energy switch.