Thrombectomy catheter with control box having pressure/vacuum valve for synchronous aspiration and fluid irrigation

A thrombectomy system comprising:

• a control box adapted to be connected to an aspiration catheter having an aspiration lumen and a high pressure irrigation lumen, the aspiration catheter having a proximal end and a distal end;
• a vacuum source producing a vacuum;
• a displacement pump;
• a fluid source adapted to supply an irrigation fluid;
• the control box operable to fluidly connect the aspiration lumen of the aspiration catheter to the vacuum source and operable to fluidly connect the high pressure irrigation lumen to the fluid source;
• wherein the control box is configured to signal the displacement pump to provide pulses of high pressure irrigation fluid in a sinusoidal pressure pattern to the high pressure irrigation lumen when the vacuum is present in the aspiration lumen, and to prevent high pressure irrigation fluid from being provided to the high pressure irrigation lumen when the vacuum is not present in the aspiration lumen;
• wherein the aspiration lumen has a distal opening and wherein the high pressure irrigation lumen has a distal orifice directed into the aspiration lumen and configured to release a jet of irrigation fluid across a width of the aspiration lumen against an opposing wall of the aspiration lumen, wherein the distal orifice is proximal of the distal opening;
• wherein the jet forms a spray pattern that interacts with the opposing wall of the aspiration lumen in such a way that embolic material is diluted for aspiration and not forced out of the distal opening.