Exam 5: Chapter 42 - Endocrine Flashcards
Pituitary Gland and Hormones Secreted
Posterior pituitary —> Antidiuretic hormone (ADH, vasopressin) —-> Kidney
Anterior Pituitary —> ACTH —-> Adrenal Cortex —-> Adrenocorticosteroids
Anterior Pituitary —> TSH —> Thyroid gland —> Thyroid hormones
Anterior Pituitary Hormones
FSH, LH, prolactin, ACTH, TSH, GH- somatotropin
Effects of anterior pituitary hormones being in excess (hyper)
Cushing syndrome (ACTH)
Gigantism (GH)
Acromegaly (GH)
Effects of anterior pituitary hormones being insufficient (hypo)
dwarfism (GH)
Condition caused by hyposecretion of all of the anterior pituitary hormones
Panhypopituitarism
The cause of panhypopituitarism:
loss of the stimulating hormones leading to shrinking of the target organs.
Posterior Pituitary Hormones
ADH or Vasopressin
Oxytocin
Effects of posterior pituitary hormones being in excess (hyper)
SIADH
Effects of posterior pituitary hormones being insufficient (hypo)
Diabetes insipidus - most common condition r/t decrease in vasopressin
Pituitary tumors
- 95% are benign
- Primary or 2ndary: functional/nonfunctional - don’t secrete hormones
- Surgery: hypophysectomy: removal of the pituitary gland
Diabetes Insipidus (DI) Causes:
- decreased amounts of ADH
- CAUSE:
- *head trauma, brain tumor, surgical interventions r/t pituitary gland, infections (meningitis, encephalitis, TB), tumors
- *Nephrogenic: failure of the renal tubules to respond to ADH
- *Drug-induced: Lithium, Declomycin
Clinical manifestations of DI
Increased amounts of dilute urine
Management/treatment of DI
- Replace ADH, fluids, and correct underlying pathology
- Desmopressin (DDAVP) is synthetic vasopressin
- Diabinese/thiazide - potentiate the action of vasopressin - used in mild disease
- Nephrogenic: Thiazide diuretics, ibuprofen, aspirin (prostaglandin inhibitors), Na restriction
The nurse is caring for a patient with DI. What nursing intervention should be implemented?
-Assess skin turgor every 2 to 4 hours.
The cause of SIADH
- Head injury, craniotomy, CNS infections, lung cancer
- Medications: Oncovin (chemo drug), Phenothiazines, TCA’s thiazide diuretics, nicotine.
Clinical manifestations of SIADH
- fluid retention
Test results:
urine = increased sodium, increased osmolarity
Blood = decreased sodium, decreased osmolarity (radioimmunoassay = increased adh)
Management/treatment of SIADH
- Diuretics - Lasix
- Fluid restriction
Nursing management r/t SIADH
- monitor I&O
- daily weight
- urine and blood work
A patient with a pituitary tumor has developed SIADH. What interventions would the nurse implement?
-Assess neuro status and weight daily
Thyroid hormones
T3, T4, Calcitonin
-Iodine is contained in thyroid hormone; T3 = 3 atoms and T4 = 4 atoms
What is needed by the thyroid gland to make the thyroid hormones?
Iodine
_____ from the _____ ______ controls the release of thyroid hormone.
TSH
Anterior Pituitary
The thyroid controls
Cellular metabolic activity
Between T3 and T4, which is more rapid-acting?
T3 is more potent and rapid-acting than T4.