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endrocrine chapter 4
Question | Answer |
---|---|
Anterior Pituitary Hormones | Growth Hormone-Thyroid stimulating hormone-Adrenocorticotropic Hormone-Follicle Stimulating Hormone-Leuntinizing Hormone-Prolactin |
Growth Hormone | Anabolic hormone(builds up) - Promotes protein synthesis(mobilizes fatty acids)-Insufficient GH= Dwarfism- Oversecretion= Acromegaly |
Growth Hormone Excess | Commonly caused by a tumor- Unwanted growth of bones and soft tissues- Elevation of blood glucose insulin antagonism- Childhood=gigantism- Adulthood=acromegaly |
Acromegaly | Develops after closure of epiphyseal plate closure- Occurs across gender- Increased mortality rate= cardiomegaly- LV hypertrophy- Hypertension- Diabetes |
Signs and Symptoms of Acromegaly | Gradual development- 7-9 years onset to diagnosis- Enlargement of hands and feet- Joint pain, arthritis- Facial features enlarge, thicken- Tounge enlargement, thickening-sleep apnea- skin changes- Polyuria- polydipsia- angina- visual disturbanc |
Diagnostic test for Acromegaly | Plasma GH level- Glucose tolerance test- CT to localize tumor- MRI- Ophthalmic exam |
Treatment for Acromegaly | Surgery= removal of tumor - Drug therapy = Sandostatin Suppresses GH- Radiation= reduce tumor size |
Radiation Therapy of Acromegaly | Reduce tuomor size prior to surgery, secondary option if surgery not effective, skin changes, hair loss, cahnges to oral mucosa, sterotactic radiosurgery for inaccessible tumor. |
Drug therapy for Acromegaly | Somatostatin analog= Sandostatin inhibits GH- may be adjunct with surgery raditation- Dopamine agonists= dostinex, bromocriptine- suppresses GH secretion |
Transphenoidal Hypophysectomy | Incistion between upper lip, gingiva- Tumor removed via sphenoid sinus- REsults within weeks depending on size of tumor. |
Pre-op Care of Transphenoidal Hypophysectomy | Offer information- alleviate anziety- antibiotic nose drops- promote oral hygiene |
Post-op Care of a Transphenoidal Hypophysectomy | HOB level- Avoid brushing teeth- avoid forceful cough, sneeze, valsalva-monitor nasal draniage- assess neuro status- analgesia for headache- pin care for head frame- monitor i&o- assess for diabetes insipidus-skin care S/P raditation. |
Antidiuretic Hormone | ADH(argenine vasopressin)-synthesized in hypothalamus- stored and secreted by posterior pitutiary- regulation of water and soduim balance-reabsorption of H2o in renal tubules |
Diabetes Insipidus - Central | Organic lesion of hypothalamus or PP- Head trauma, cranial surgery, CNS infection. |
Diabetes insipidus Nephrogenic | Decreased renal responsiveness |
Diabetes Insipidus Dispogenic | Structural lesion in thirst center- psychogenic polydipsia |
Symptoms of Diabetes Indsipidus | increased thirst increased UOP nocturia increased serum osmolarity a> 295 beneralized weakness |