Expandable medical implants for maintaining support of a body lumen are disclosed. Some embodiments may include wavelength locking with devices such as VBGs and other suitable devices and methods. Influent water enter the blender through nozzles aligned with the injection of the high-pressure water to blend with the white-water. A cam-actuated turning system is mounted to the trolley support and operatively connected to the bird carrier for rotating the trolley support and the bird carrier in unison. This allows, even when all of the quantized results of the transformation coefficients of the element blocks are zero, coding of quantization parameter of current element block and control of filtering strength. As new data elements are received, a new sum is calculated by reusing the prior sum and a new standard deviation is calculated by reusing the prior standard deviation.