Quote from fatula
Hello! I'm having a trouble with IV fluids. I'm a first semester nursing student. Our final is in 2 weeks, I may pass the exam by memorizing the types of solutions, conditions, etc; however, I reaaaaaaaaaally would like to understand and digest the subject. I've read the textbook, read something from this website (from previous concerns and questions) but it haven't clicked yet! I don't know maybe it is related to my lack of concentration lately or one those blah moments, but I need help. It would be deeply appreciated if someone can help me or recommend me a book, website, or I don't know something!!! IV fluids (colloids vs. crystalloids) advantages ; disadvantages??? Why? How? God, what's wrong with me?
What, particularly, do you find difficult? Calculating rates? Tonicity?
A colloid is a mixture with heavy, evenly dispersed molecules (typically protein) whereas a crystalloid is typically a salt-based solution with dissolved molecules.
Colloids are useful primarily for re-establishing proper pressure gradients at the level of the capillary. Remember oncotic and osmotic pressures from A&P? Colloids can't cross the capillary membranes very well, so interstitial water is forced to diffuse into the vascular system.
Crystalloids are all your normal solutions you use- NS, LR, D5NS, and so on.