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... cles. The catheter entered the blockage position of the coronary artery and Zheng Ren opened the drill head.
The drill head was welded to a long and soft spiral rotating catheter, driven by a gas turbine connected to it to rotate at a high speed of 180,000 to 200,000 rpm.
When the drill head rotated at high speed, it could grind the plaque into small debris and wash it to the far end. The debris could then pass through the capillary bed.
There was a cavity in the ca ...
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