For an adolescent client with anorexia nervosa and a BMI of 13, what should be the nurse's priority in care planning?

Monitoring the client's urine output and vital signs is the priority in care planning for an adolescent with anorexia nervosa and a significantly low BMI of 13. These measures are critical for assessing the client's overall health status and identifying any immediate medical complications that could arise from severe malnutrition, such as electrolyte imbalances, cardiac instability, or renal issues. Anorexia nervosa can lead to life-threatening conditions, and maintaining close observation of vital signs can help in detecting possible deteriorations in physical health, which is paramount especially when the BMI indicates severe malnourishment.

Additionally, tracking urine output can provide insight into the client's hydration status and kidney function, both of which can be adversely affected by the restrictive eating patterns associated with anorexia. Early detection of complications is essential for timely medical intervention and can significantly impact the client's recovery process. Therefore, prioritizing physiological monitoring allows healthcare providers to ensure safety and respond swiftly to any adverse developments in this vulnerable population.