When caring for a client with diabetes insipidus who is receiving antidiuretic hormone intranasally, which serum lab test is most important for the nurse to monitor?
A.
Platelets
B.
Glucose
C.
Osmolality
D.
Calcium
The Correct Answer and Explanation is:
The most important serum lab test for the nurse to monitor in a client with diabetes insipidus (DI) who is receiving intranasal antidiuretic hormone (ADH) is:
C. Osmolality
Explanation:
Diabetes insipidus is a condition characterized by an insufficient production or action of antidiuretic hormone (ADH), leading to excessive thirst and the excretion of large volumes of dilute urine. The primary goal of treatment for DI is to manage fluid balance and maintain proper hydration by compensating for the reduced ADH activity. This is typically achieved through the administration of synthetic ADH, such as desmopressin, which can be given intranasally.
Monitoring osmolality is crucial in this scenario because it reflects the concentration of solutes in the blood and provides valuable information about the body’s fluid status. In DI, the primary concern is to correct the elevated serum osmolality that results from excessive loss of water and to monitor for the effectiveness of the ADH treatment.
- Serum Osmolality: Elevated serum osmolality is indicative of a high concentration of solutes in the blood, which can occur when the body is not retaining adequate water. By monitoring serum osmolality, the nurse can assess whether the intranasal ADH is effectively reducing urine output and improving fluid balance. A decrease in serum osmolality suggests that the treatment is working as expected, leading to more concentrated urine and a better fluid balance.
- Platelets: Although monitoring platelets is important for detecting potential bleeding disorders or reactions to medication, it is not directly related to the management of DI or the effectiveness of ADH therapy.
- Glucose: Monitoring glucose levels is important in the management of diabetes mellitus but is not specifically related to the management of DI or the efficacy of ADH therapy.
- Calcium: Serum calcium levels are monitored in conditions related to calcium metabolism or bone health but are not directly relevant to the management of DI or the effectiveness of ADH treatment.
In summary, serum osmolality is the most pertinent lab test to monitor in a client receiving intranasal ADH for diabetes insipidus, as it directly reflects the effectiveness of the treatment in correcting the imbalance of water and solutes in the body.