Complex irrigation/suction flow path in a medical device

A medical system comprising:

• a backend housing that receives a first conduit and a second conduit, the first conduit configured for communication with a pressurized fluid source and the second conduit configured for communication with a vacuum source, the backend housing further including:
• a valve body coupled to the first and second conduits, the valve body including a first valve plunger channel and a second valve plunger channel;
• a first valve plunger inserted into the first valve plunger channel, the first valve plunger including a first valve opening;
• a second valve plunger inserted into the second valve plunger channel, the second valve plunger including a second valve opening that is longer than the first valve opening, wherein the first valve plunger channel is configured in parallel with the second valve plunger channel;
• and
• a first manual actuation button coupled to the first valve plunger and a second manual actuation button coupled to the second valve plunger;
• and
• an elongate instrument shaft protruding distally from a chassis portion of the backend housing, the chassis portion configured to couple to a robotic control interface to permit remote control of the first valve plunger and the second valve plunger.

A medical device comprising:

• a first fluid channel defined in the medical device;
• a second fluid channel defined in the medical device;
• a first valve plunger comprising a button comprising a convex top surface;
• and
• a second valve plunger comprising a button comprising a concave top surface,
• wherein the first valve plunger is positioned to control a fluid flow in the first fluid channel,
• wherein the second valve plunger is positioned to control a fluid flow in the second fluid channel, and
• wherein the button of the first valve plunger and the button of the second valve plunger are positioned adjacent one another.