Alterations In Endocrine Function Flashcards
The endocrine system is comprised of what: name them
Glands that secrete hormones. Pituitary, thyroid, parathyroid, adrenal, gonads, pancreas
There are two parts of the pituitary gland, the anterior and posterior. Which produces hormones?
The anterior pituitary produces seven hormones, while the posterior pituitary only stores two hormones
What seven hormones does the anterior pituitary secrete?
Growth hormones, thyroid stimulating hormone, corticotropin, follicle-stimulating hormone, Leutinizing hormones, prolactin, Melanocytes
What to hormones does the posterior pituitary store?
Oxytocin and antidiuretic hormone
What are the disorders of pituitary function?
Growth hormone deficiency, and diabetes insipidus
How is growth hormone deficiency characterized?
During infancy and childhood it is characterized by growth retardation, short stature, and delayed bone maturation
What are the causes of growth hormone deficiency?
Idiopathic, CNS infection, infarction of the pituitary gland, tumors
What are the clinical manifestations of growth hormone deficiency?
Appears infantile with small mandible and small teeth, Higher pitched voices, delayed sexual maturation
What are some diagnostic test that can be performed to determine if a person has growth hormone deficiency?
Wrist, provocative growth hormone tests
How is provocative growth hormone test done?
Various medications are used to stimulate the release of GH. Confirmation of GH deficiency based on two failures of the provocative stimuli test. Sleep specimens, exercise tests, IGF/1
What is the treatment for growth hormone deficiency?
Daily SQ/IM injections of growth hormone. Replacement is expensive starting at $35,000 a year. This is continued until they reach acceptable height or growth
What is diabetes insipidus?
A disorder of the posterior pituitary resulting in hyposecretion of ADH which produces a state of uncontrolled diaresis
What are causes of diabetes insipidus?
CNS trauma, brain tumor ( 50% of DI), infection, electrolyte in balance says, surgical procedure (hypophysectomy), Hypoxic brain damage, neoplasm, vascular anomaly, leukemia
What are clinical manifestations of diabetes insipidus?
Sudden onset of symptoms: polyuria, polydipsia, irritability, enuresis, dehydration
What diagnostic tests are performed to confirm diabetes insipidus
Serum electrolytes, serum and urine osmolality’s, measurement of plasma arginine vasopressin before and during fluid deprivation test