System and methods are provided that include a plate member engageable to the spinal column with an anchor assembly. In one embodiment, the catheter comprises a catheter body, a cutting blade, and an imaging device. The data lines are electrically connected to the driving unit and the first pixel electrode array, and part of the data lines are electrically connected to the second pixel electrode array through the first substrate. A gasket member is located between the container neck and the manifold, and has a flexible and resilient flap portion which acts as a check valve for the air passage.