A nurse observes a newly licensed nurse administer enoxaparin subcutaneously using a pre- filled syringe. Which of the following indicates appropriate medication administration?

B. One of the significant changes that occur with aging is a decline in kidney function. This includes a decrease in renal blood flow, glomerular filtration rate (GFR), and the ability of the kidneys to concentrate urine. These changes can impair the body's ability to conserve water and maintain electrolyte balance, increasing the risk of dehydration.

A. As individuals age, there is actually a decrease in the percentage of body water relative to lean body mass. This is because aging is associated with an increase in adipose tissue and a decrease in muscle mass, which affects the overall body composition.

C Saliva production typically decreases with age, rather than increases. Reduced saliva production can contribute to dry mouth and may affect hydration status indirectly, but it is not a primary factor in increasing dehydration risk in older adults.

D. While changes in blood pressure can occur with aging, such as an increase in systolic blood pressure due to arterial stiffening, this does not directly contribute to an increased risk of dehydration. Blood pressure changes are more related to cardiovascular health rather than fluid balance.

C. Dextrose 5% in water is a hypotonic solution that contains 5 grams of dextrose in each 100 mL of water. It provides free water without adding significant sodium, which helps to dilute the elevated sodium levels in hypernatremia. This solution is effective in correcting hypernatremia by promoting water movement from the intravascular space into the cells and extracellular space.

A. Albumin solutions are primarily used for volume expansion and to increase oncotic pressure in conditions like hypoalbuminemia or shock. They do not provide free water and are not typically used for treating hypernatremia.

B. Dextrose 10% in water is a hypertonic solution used primarily for providing calories and treating hypoglycemia. It does not correct hypernatremia because it does not significantly affect sodium levels or provide sufficient free water to dilute sodium.

D. Dextran 40 is a colloid solution that is used for volume expansion in hypovolemia or shock. It does not provide free water and is not indicated for correcting hypernatremia.