A roll-up wound protector has a distal ring, a proximal ring, and a flexible sleeve extending between the proximal and distal rings. When a force is applied in a first direction making the operation rod and the spinning device move relatively in an axial direction, the mechanism in the spinning device drives the operation rod and the mop head to spin in the same direction simultaneously so as to generate a centrifugal force to remove the water from the mop head. Also, a system is provided for characterizing autonomic nervous system activity of a patient comprising a processor and a machine-readable medium tangibly embodying a program of instructions executable by the processor. The point of the blade 1 is swingingly stretched out of the casing 2 from the blood-taking opening 5 along the arc-shaped path A, thus producing the incising action. The pads of the present invention have an advantageous hydrophilic polishing material and have an innovative surface topography and texture which generally improves predictability and polishing performance.