Isotonic Maintenance Fluids for the Prevention of Hospital-Acquired Hyponatremia. The use of isotonic fluids in maintenance fluids for the prevention of hospital-acquired hyponatremia in acutely ill patients was initially controversial,58,59 owing mainly to the potential for unintended consequences.
Twice a year according to the book. Some pianos are very stable but some are ready for a tuning after a few months. New pianos need more regular tuning, usually four times a year for the first few years until the âstretchâ is out of the strings. Should you transport your piano to another house, it will need a month to acclimatise to its new surroundings.
This means that the piano can play 88 different pitches (or notes), going from the deepest bass range to the highest treble. The black keys are for the accidentals (Fâ¯/Gâ­, Gâ¯/Aâ­, Aâ¯/Bâ­, Câ¯/Dâ­, and Dâ¯/Eâ­), which are needed to play in all twelve keys.