5. Iv solutions

F&L Quick Notes: IV Solutions

Hypotonic solutions• Definition: when a solution contains a lower concentration of solute than another

more concentrated solution, then it is a hypotonic solution.

• These solutions have lower osmolality than body fluids.

• They cause the movement of water into cells by osmosis, swelling the cells like a BIG fat hippo, and therefore should be administered slowly to prevent cellular edema

Memory Trick:• HypO - tonic• HippO - tonic = fluid swells the cell like a big hippo

• List of fluids:• 0.45% sodium chloride (1/2 NS)• 0.225% sodium chloride (1/4 NS)• 0.33% sodium chloride (1.3 NS)

• Definition: when solutions on both sides of a selectively permeable membrane have established equilibrium or are equal in concentration, they are isotonic.

• Human blood is isotonic thus very little osmosis occurs since isotonic solutions have the same osmolality as body fluids & thus increase extracellular fluid volume.

Memory Trick:• Iso-tonic Solutions• I-so-Perfect (no fluid shift, “I’m so perfect” perfect balance)

• List of fluids:• 0.9% sódio, chloride (normal saline)• 5% dextrose in water (DWS)• 5% dextrose in 0.225% saline (DSW/ 1/4 NS)• Lactated Ringer’s (LR)

Isotonic solutions

Hypertonic solutions• Definition: when a solution contains a higher concentration of solutes than

another less concentrated solution, then it is a hypertonic solution.• These solutions have higher osmolality than body fluids• They cause the movement of water outside the cells by osmosis, making the

cells skinny like a hyper person.

Memory Trick:• Hyper - tonic• Hyper person = very skinny cells like a hyper person is skinny

• List of fluids:• 3% sodium chloride (3% NS)• 5% sodium chloride (5% NS)• 10% dextrose in water (D10W)• 5% dextrose in 0.9% sodium chloride (D5W/NS)• 5% dextrose in 0.45% sodium chloride (D5W/ 1/2 NS)• 5% dextrose in Lactated Ringer’s (D5LR)