Show Example 1: Desired strength = 5% Available strength = 50% Desired volume = 500ml Percentage solutions in drip bags... Never fun, right? The most common one we probably encounter in practice is the glucose (or dextrose) CRI. These used to absolutely baffle me until I learned this quick tip: 2.5% = 0.05ml of 50% glucose for every 1ml of fluid in the bag5% = 0.1ml of 50% glucose for every 1ml of fluid in the bag The complete calculation is:
⚠️ Remember that in order for the percentage to be accurate, 𝘵𝘦𝘤𝘩𝘯𝘪𝘤𝘢𝘭𝘭𝘺 you should remove the same volume of fluid from the bag before adding your drug. Otherwise your percentage won't be accurate. For example, if we did not remove 50ml of Hartmann's before adding out 50ml glucose, we would have 5% of 550ml, which is actually a 4.5% glucose solution! ⚠️ |