Question

Intravenous fluids (usually shortened to 'IV' fluids) are liquids given to replace water, sugar and salt that you might need if you are ill or having an operation. Why do intravenous solutions need to have the same tonicity as blood?

Answer 1

Step-by-step explanation:

Intravenous solutions need to have the same tonicity as blood in order to avoid disrupting the osmotic balance within the body. Tonicity is a measure of how much solute is dissolved in a solution, relative to the solute concentration in the blood. When a solution with a different tonicity is introduced into the body, it can cause cells to swell or shrink, depending on the difference in solute concentrations. Having a solution with the same tonicity as blood helps to maintain the body's osmotic balance, which is essential for maintaining good health.