When educating a client on the use of an adjuvant medication, which statement best demonstrates the nurse’s understanding of this therapy?

Choice A reason: Serum sodium levels are not the best determination of hydration in this client, as they can be affected by other factors, such as fluid intake, fluid loss, kidney function, or medication use. Serum sodium levels can be normal, high, or low in a dehydrated or overhydrated client, depending on the cause and type of the fluid imbalance.

Choice B reason: BUN stands for blood urea nitrogen, which is a waste product of protein metabolism that is excreted by the kidneys. BUN is not the best determination of hydration in this client, as it can be influenced by other factors, such as protein intake, liver function, or muscle breakdown. BUN can be high or low in a dehydrated or overhydrated client, depending on the cause and type of the fluid imbalance.

Choice C reason: Urine osmolality is the best determination of hydration in this client, as it measures the concentration of solutes in the urine, which reflects the ability of the kidneys to adjust the urine output according to the fluid status. Urine osmolality can indicate the degree of dehydration or overhydration in a client, as it increases or decreases in response to the fluid balance.

Choice D reason: Urine color is not the best determination of hydration in this client, as it can be affected by other factors, such as food, medication, or infection. Urine color can be dark or light in a dehydrated or overhydrated client, depending on the cause and type of the fluid imbalance.

Choice A reason: This is a correct answer because heart failure is a condition in which the heart cannot pump enough blood to meet the body's needs. This can cause fluid retention and congestion in the lungs, kidneys, and other organs. Heart failure can also affect the thirst mechanism and the secretion of antidiuretic hormone, which can lead to reduced fluid intake and increased fluid loss. Therefore, heart failure can increase the risk of dehydration in older clients.

Choice B reason: This is a correct answer because nonfunctional impairments are limitations in the ability to perform activities of daily living, such as bathing, dressing, or toileting. Nonfunctional impairments can be caused by various factors, such as cognitive decline, mobility problems, or sensory loss. Nonfunctional impairments can affect the access to fluids, the awareness of thirst, or the ability to swallow. Therefore, nonfunctional impairments can increase the risk of dehydration in older clients.

Choice C reason: This is a correct answer because longitudinal furrows on the tongue are signs of dehydration in older clients. The tongue is a mucous membrane that can reflect the hydration status of the body. Dehydration can cause the tongue to lose its moisture and elasticity, and develop cracks or fissures along its length. Therefore, longitudinal furrows on the tongue can indicate dehydration in older clients.

Choice D reason: This is an incorrect answer because hypertension is not an issue that might put your client at risk for dehydration, but rather a complication of dehydration. Hypertension is the elevation of the blood pressure above the normal range, which can damage the blood vessels and increase the risk of cardiovascular disease. Hypertension can be caused by various factors, such as aging, obesity, smoking, stress, or kidney disease. Dehydration can also cause hypertension, as the loss of fluid can reduce the blood volume and increase the blood viscosity and concentration of sodium. Therefore, hypertension is not a risk factor for dehydration, but a consequence of dehydration.