The present disclosure provides devices and methods for harvesting and processing tissue from patients for grafting. The semiconductor substrate further includes an etch-back indicator that includes trenches of different sizes having polysilicon filled in the trenches and then completely removed from some of the trenches of greater planar trench dimensions and the polysilicon still remaining in a bottom portion in some of the trenches having smaller planar trench dimensions. When the connector bodies are disconnected, a syringe or negative pressure source may be attached to withdraw residual fluid from the catheter’s closed loop circuit and to deflate any expandable portion of the closed loop circuit. The eccentric oscillating gear device is provided with rotational phase adjusting section for setting an orientation of the crankshaft about an axis thereof, on the basis of orientations of the outer cylinder and the carrier about an axis thereof.