Certified Burn Registered Nurse Certification Practice Exam

The three categories of crystalloid solutions based on tonicity are hypotonic, isotonic, and hypertonic. Hypotonic solutions have a lower concentration of solutes compared to the inside of the cells, leading to water moving into the cells, which may cause them to swell. Isotonic solutions have the same concentration of solutes as the cells, which means there is no net movement of water into or out of the cells, maintaining cell size and stability. Hypertonic solutions contain a higher concentration of solutes than the inside of the cells, causing water to move out of the cells and leading to cell shrinkage. Understanding these classifications is crucial in clinical settings, particularly in fluid resuscitation and managing electrolyte imbalances in patients, including burn victims. Each type of solution plays a specific role based on the patient's needs regarding fluid and electrolyte balance.