Diphasic dyskinesia - occurs when plasma levodopa levels are rising or falling.

As patients advance, they may evidence diphasic dyskinesia (DD), which occur when the drug concentration rises or falls.

This technique is also known as the sol-gel method because the 'sol' (or solution) gradually evolves towards the formation of a gel-like diphasic system.

Thus, the sol evolves towards the formation of a gel-like diphasic system containing both a liquid phase and solid phase whose morphologies range from discrete particles to continuous polymer networks.

The principle is simple: a pump lifts water from the bottom of the lake, heavily saturated with CO, until the loss of pressure begins releasing the gas from the diphasic fluid and thus makes the process self-powered.

This shifting of the pacemaker from the SA node to adjacent tissues is identifiable on ECG Lead II by morphological changes in the P-wave; sinus beats have smooth upright P waves, while atrial beats have flattened, notched, or diphasic P-waves.