(2) Exam 2- Adrenal Cortex Flashcards
What is the precursor for steroid hormone synthesis
Cholesterol
What are the three main classifications of the adrenal cortex steroid hormones
Glucocorticoids
Mineralocorticoids
Androgens
What is the primary glucocorticoid
Cortisol
What do glucocorticoids do
Increase blood glucose levels
Regulate metabolism
Psychologic stress response
What is the primary mineralocorticoids
Aldosterone
Mineralocorticoids regulate
Sodium and potassium balance
What is the most abundant and potent glucocorticoid, and is necessary to maintain life and protect the body from stress
Cortisol
One major function of Cortisol is the regulation of
Blood glucose
Cortisol levels are increased by
Stress, burns, infection, fever, acute anxiety, and hypoglycemia
Androgynous contribute to
Growth and development
What does the term corticosteroid refer to
Anyone of the three types of hormones produced by the adrenal cortex
(glucocorticoids, mineralocorticoids, and androgens)
What is the clinical condition that results from chronic exposure to access corticosteroids, particularly glucocorticoids
Cushing syndrome
Sodium and potassium levels in Cushing syndrome
⬆️sodium
⬇️potassium
What are the causes of Cushing syndrome
Exogenous corticosteroids
ACTH – secreting pituitary adenoma
Adrenal tumors
Ectopic ACTH production by tumors
What is the most common cause of Cushing’s syndrome
administration of exogenous corticosteroids (prednisone)
Clinical manifestations of Cushing Syndrome
What are the first indications of Cushing’s syndrome
Truncal obesity or generalized obesity
“Moon face”
Purplish red striae
Hirsutism in woman
Menstrual disorders
Hypertension
Unexplained hypokalemia
Clinical manifestations of Cushing Syndrome
Where do you usually find purplish red striae on patients with Cushing syndrome
Usually depressed below the skin surface on the abdomen, breast, or buttocks
Clinical manifestations of Cushing Syndrome
What is the general appearance of A patient with excess glucocorticoids
Truncal obesity, thin extremities, rounding of the face (moon face), fat deposits on back of neck and shoulders (buffalo hump)
Clinical manifestations of Cushing Syndrome
Integumentary changes with excess glucocorticoids
Thin and fragile skin
purplish red striae
Acne
petechial hemorrhages
bruises
Clinical manifestations of Cushing Syndrome
Cardiovascular changes with excess Glucocorticoid
Hypervolemia
Hypertension
Edema of the lower extremities
Clinical manifestations of Cushing Syndrome
Musculoskeletal changes with excess Glucocorticoid
Muscle wasting in extremities (weakness)
Loss of bone (osteoporosis, back pain)
Fractures
Awkward gate
Fatigue
Clinical manifestations of Cushing Syndrome
Immune changes with excess Glucocorticoid
Inhibition of immune response
Suppression of allergic response
Clinical manifestations of Cushing Syndrome
Metabolic changes with excess Glucocorticoid
Hyperglycemia
Clinical manifestations of Cushing Syndrome
Emotional changes with excess Glucocorticoid
Irritability
anxiety
euphoria
psychosis
Clinical manifestations of Cushing Syndrome
Mineralocorticoid excess may cause what cardiovascular and fluid and electrolyte changes
Fluid retention which leads to hypertension
Clinical manifestations of Cushing Syndrome
Integumentary changes with excess androgens
Hirsutism
Severe acne
Hyperpigmentation
Clinical manifestations of Cushing Syndrome
Reproductive changes with excess androgens
Menstrual irregularities
Virilization in woman
Feminization in men
Diagnosis for Cushing syndrome
What diagnostic studies are done to diagnose Cushing syndrome
Serum cortisol
24 hour urine collection for free cortisol
Low-dose dexamethasone suppression test
ACTH levels
Diagnosis for Cushing syndrome
Serum cortisol level is measured in daily variations. What results indicates Cushing syndrome?
Elevated levels of serum cortisol
Diagnosis for Cushing syndrome
What are the normal serum cortisol levels at 8 AM and 4 PM?
8 AM (5 - 23 mcg/dL)
4 PM (3 - 16 mcg/dL)
Diagnosis for Cushing syndrome
With a 24 hour urine collection for free cortisol, what urine cortisol levels indicate Cushing syndrome
Elevated levels of urine cortisol
Diagnosis for Cushing syndrome
In a 24 hour urine collection for free court is all what is The normal range for urine cortisol?
80 - 120 mcg/24hrs
Diagnosis for Cushing syndrome
With a low-dose dexamethasone suppression test, what can cause false positive results?
Depression
Medications- phenytoin (Dilantin), rifampicin (Rifadin)
Diagnosis for Cushing syndrome
To suppress ACTH in a dexamethasone suppression test, low or high dose dexamethasone is given at what time?
11 PM
Diagnosis for Cushing syndrome
At 8 AM, what is the normal response of cortisol to a dexamethasone suppression test?
Cortisol should be down
Diagnosis for Cushing syndrome
High or normal ACTH levels indicate
Cushing disease
Diagnosis for Cushing syndrome
Low or undetectable ACTH levels indicate
Adrenal or medication etiology
Collaborative care for Cushing syndrome
What is the primary goal of treatment?
To normalize hormone secretion
Collaborative care for Cushing syndrome
What are the types of surgical management?
Hypophysectomy
Adrenalectomy
Collaborative care for Cushing syndrome
Hypophysectomy is indicated when Cushing syndrome is caused by
Pituitary adenoma
Collaborative care for Cushing syndrome
An adrenalectomy is indicated when Cushing syndrome is caused by
Adrenal tumors or hyperplasia
Collaborative care for Cushing syndrome
When the patient is a poor candidate for surgery or prior surgery has failed, then direct therapy may be attempted. The goal of drug therapy is to suppress the synthesis and secretion of cortisol from the
Adrenal gland
Collaborative care for Cushing syndrome
Why are the medications used to suppress the synthesis and secretion of cortisol from the adrenal gland, used cautiously?
The dosages needed to reduce cortisol secretion are often toxic
Collaborative care for Cushing syndrome
What medications may be needed to avoid adrenal insufficiency
Prednisones or hydrocortisone
Collaborative care for Cushing syndrome
Gradual tapering of corticosteroids is necessary to avoid
Potentially life-threatening adrenal insufficiency
Collaborative care for Cushing syndrome
What is used for endogenous cortisol replacement
Prednisone or Hydrocortisone
Collaborative care for Cushing syndrome
When prednisone is used for endogenous cortisol replacement, what dosage is given and at what time
2/3 dose in AM
1/3 dose in PM
Collaborative care for Cushing syndrome
When prednisone is used for endogenous cortisol replacement, what should the patient be taught about stopping the medication
Do not stop abruptly
Collaborative care for Cushing syndrome
When prednisone is used for endogenous cortisol replacement, what should the patient be instructed to keep with them
Hydrocortisone emergency kit
Collaborative care for Cushing syndrome
When prednisone is used for endogenous cortisol replacement, what should be checked
Blood glucose
Nursing Diagnosis for Cushing Syndrome
What are priority nursing diagnoses for the patient with Cushing syndrome?
Risk for infection
Imbalanced nutrition
Disturbed body image
Impaired skin integrity
Acute interventions for Cushing Syndrome
Because the therapy has many side effects, assessment focuses on signs and symptoms of
hormone and drug toxicity and complicating conditions
Acute interventions for Cushing Syndrome
Assess and monitor
Vital signs Daily weight Glucose Signs of inflammation/ infection Pain Sudden cardiac symptoms
Acute interventions for Cushing Syndrome
To give emotional support, reassure the patient that the physical changes and much of the emotional lability will resolve when
hormone levels return to normal
Preoperative care for Cushing Syndrome
What must be controlled before surgery
Hypertension
Hyperglycemia
Hypokalemia
Protein depletion
Preoperative care for Cushing Syndrome
To prevent sudden drop during surgery, what additionally is the patient given before surgery
Glucocorticoid
Preoperative care for Cushing Syndrome
What type of diet is recommended before surgery?
⬆️calorie
⬆️protein
Preoperative care for Cushing Syndrome
How is hypokalemia corrected
With diet and potassium supplements
Postoperative care for Cushing Syndrome
After surgery, why is the patient at an increased risk for hemorrhage
Because the adrenal glands are vascular
Postoperative care for Cushing Syndrome
Postoperatively, BP, fluid balance, and electrolyte levels may be unstable due to
Hormone fluctuations