The present invention provides novel microfluidic devices and methods for preventingameliorating formation of precipitate blockages in microfluidic devices. The surgical balloon is further provided with a balloon fixing device, a drain for draining water from the front nostril and a tube for supplying rinsing water into the nasal cavity so that a surgical operation using an endoscope is carried out inside the nasal cavity with the nasal cavity filled with a water flow. They also preventively inhibit the pathophysiological processes in the formation of ischemically induced damage, in particular in the production of ischemically induced cardiac arrhythmias. The particulate form effective in reducing lung capacity in a noninvasive manner remains at or on an affected part of the lung to promote andor induce fibrosis. Accordingly, the capacitance component is integrated into the circuit board structure. If there are cash flow shortfalls in any year, the program uses a two step present value calculation to determine how much the individual would need in a lump sum today or contribute monthly or annually to provide sufficient funds in the year needed to fill the shortfall.