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50 terms

Endocrine Disorders

STUDY
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is a protein (or protein-based molecule) that speeds up a chemical reaction in a living organism
enzyme
Somatomedins -
insulin-like polypeptides made by the liver and some fibroblasts and released into the blood when stimulated by somatotropin. They cause sulfate incorporation into collagen, rNA, and dNA synthesis, which are prerequisites to cell division and growth of the organism.
Insulin,
is a hormone secreted by the beta cells of the pancreas that controls the metabolism and cellular uptake of sugars, proteins, and fats.
Glucagon
has a major role in maintaining normal concentrations of glucose in blood, and is often described as having the opposite effect of insulin. Released by alpha cells
Delta Cells
secrete somatostatin which inhibits secretion of both insulin and glucagon
Maturity-onset diabetes of the young (MODY)
is a rare form of juvenile diabetes mellitus, defined by early onset, absence of ketosis, non-insulin-dependent diabetes and autosomal dominant inheritance , onset <25y/o.
Diabetes Types
DM Type I: genetic, no insulin production
DM Type II: aquire, inadequate insulin production or insulin resistance
Gestational: during pregnancy
MODY: Type II for fat kids
DM Triad
polyphagia, polydipsia, polyuria
DM hallmark
hyperglycemia
Blood sugar spills over into the kidney when it reaches mg/dL?
180
Normal fasting glucose
between 70-110 (non fasting 140-200)
DM type I
acute onset, ketoacidosis, weakness, "unwell", hyperventilation, ketones on breath, days to weeks of weight loss, 3 P's, Lethargy
glycosylated hemoglobin
lab test used to determin long term glucose control
Insulin Preperations
rapid action: regular
Intermediate action: Semilente
Prolonged Action: Ultralente
Oral hypoglycemics in DM I?
Never
the most common cause of legal blindness in the age group 20 to 65)
diabetic retinopathy -
Diabetic Ketoacidosis (DKA)
the patient is glucose starved at the cellular level, and he has switched to ketone metabolism, which leads to an acidic state. Hyperglycemia, hypovolemia, polydipsia/uria, NV, dehydrated, Ketotic breath, Kussmaul's resp, altered LOC
DKA Tx Priorities
Fluid deficit, Potassium Def, Insulin Def
Hyperosmolar Hyperglycemic State
severe hyperglycemia, hyperosmolarity, and a relative lack of ketonemia. It is typically found in a debilitated patient with poorly controlled or undiagnosed type II diabetes mellitus (DM), limited access to water, and commonly, a precipitating medical event. Subtle vitals changes, profound shock/coma, focal neuro changes, can be seen in non-diabetic (i.e. stroke, burn MI)
Insulin shock-hypoglycemia
excess insulin with a glucose deficit (ie missed meal, increased exercise), light headed, diplopia, confusion, frank coma, tachycardia, pale, diaphoretic, LOC, seizurs etc
Insulin shock-hypoglycemia Tx
If alert oral glucose, if not IV D50W
The oral glucose tolerance test (OGTT)
is given to pregnant women at 28 weeks gestation to test for gestational diabetes.
Thyroid feedback loop
hypothalmus, pituitary, thyroid (T3 and T4)
MCC thyroid disorder, hyper or hypo?
Hyper
Hyperthyroidism
can cause nervousness, irritability, increased perspiration, intolerance to heat, fatigue, difficulty sleeping, a fast heartbeat, irregular menstrual periods in girls, and muscle weakness. People with this problem might lose weight even though they're eating more than usual. The eyes may feel irritated or look like they're staring. Sometimes the tissues around the eyes become inflamed and swollen, and the eyes appear to bulge out, decreases TSH, Triad: skin, eyes, heart
Graves' disease
is an immune system disorder (antibody complexes attach the thyroid g. & similar tissue) that results in the overproduction of thyroid hormones (hyperthyroidism), esp. under 40 y/o. Pretibial myxedema, exopthalmos,
exopthalmos
bug eyes
Thyroid Storm
extremely exagerated signs of hyperthyroidism, triggered by surgery or other thyroid Tx's, main S&S extreme weight loss >40lbs, high fever, tachycardia, vomiting, diarrhea, dehydration, delerium
Thyroid Storm Tx
Preventative: beta blocker lower HR, APAP lowers fever (no ASA)
Hypothyroidism
increased TSH, failure of the gland after an autoimmune attack (Hashimoto's thyroiditis), hoarseness, cold intolerance, weight gain, goiter, coarse brittle hair, non-pitting puffiness, "Queen Ann's Sign" (loss of lateral aspect of eyebrom), basically the opposite of hyperthyroidism, cretinism
Hypothyroid Cretinism
signs seldom apparent at birth, delayed closure of fontanels, failure to thrive, protuberant abd, Dry skin, dwarfism, flattened broad nose, derived from the French "chretien," meaning Christian or Christ-like, and was applied to these unfortunates because they were considered to be so mentally retarded as to be incapable of sinning!"
Hypothyroid DOC
levothyroxine (Synthroid), iodized salt in deficient areas
Goiter
associated with overproduction of thyroid hormone or malignancy. The thyroid can become very large so that it can easily be seen as a mass in the neck. Complications can include airway compromise and a superior vena cava syndrome. These patients will typically complain of a cough, a slight change in voice, or nighttime choking episodes because of the way that the gland compresses the trachea while sleeping.
hypercalcemia
"stones, bones, groans, and moans," kidney stones, weakened bones (brown tumors), weight loss/abd pain, depression fatigue, arthralgias, pathologic Fx, primary parathyroidism, excess exo/edogenous vit D, symptom of HPT
Cushing's disease
describes the condition resulting from too much exposure to steroid hormones. The commonest cause of it is the usage of synthetic steroids. The excess production of ACTH by a tumor in the pituitary gland is the next most common cause. increased cortisol, moon face, buffalo hump, hirsutism, truncal obesity w/ extremity wasting
Disorders of the Adrenal gland (3)
Cushing's disease, Addison's disease/crisis, Pheochromocytoma
Addison's disease
occurs when the adrenal glands do not produce enough of the hormone cortisol and, in some cases, the hormone aldosterone. The disease is also called adrenal insufficiency, or hypocortisolism. "the unforgiving master...", fatigue, weakness, weight loss, hyperpigmentation, Kennedy had it, managed w/ oral hydrocortisone
Cortex hormones
"salt, sugar, sex" mineralcorticoids(aldosterone), glucocorticoids(cortisol), androgens
Medulla hormones
catecholamines (epi, norepi)
Addison crisis
can begin with sudden penetrating pain in the lower back, abdomen, or legs, severe vomiting and diarrhea leading to dehydration, low blood pressure, loss of consciousness. Left untreated crisis can be fatal. Disease symptoms progress slowly, they are usually ignored until a stressful event like an illness or an accident causes them to become worse=crisis.
Pheochromocytoma
tumor in adrenal gland medulla, hypersecretes its product, the catecholamines epinephrine and norepinephrine, accounts for less than 1% of HTN, HTN is paroxysmal, Headache, profuse sweating, palpitations, and apprehension, often with a sense of impending doom, are common. Pain in the chest or abdomen may be associated with nausea and vomiting. Pallor or flushing may occur. The blood pressure is elevated, often to alarming levels, and is usually accompanied by tachycardia.
Pheochromocytoma Tx
Beta blockade, then Alpha blockade, definitive+surgery
Posterior Pituitary Disorders (2)
Too much ADH= syndrom of inappropriate ADH (SIADH)
Too Little ADH= Diabetes insipidus
SIADH
too much ADH, oliguria, HTN, no evidence of shock, euvolemic hyponatremia, Tx: water restriction,
Diabetes insipidus
there is not enough ADH being secreted, polyuria, polydipsia, Tx: ADH/desmopressin
Anterior Pituitary Disorders
adenomas: growth hormone secreting tumor or Proclactinoma
Dwarfism
GH deficiency
Excessive Growth hormone
In children: effects linear bone growth, gigantism,
In adults: growth plates fused, enlargement of hands, feet, skull, slow onset, changes not noticed by patient, excessive sweating, Complications: HTN, DM, cardio, sleep apnea, calcinosis, osteoporosis
Prolactinoma
MCC pituitary tumor, causes milk production and severe menses in non-preg females and decreased libido, impotence, and milk/breast production in men
Prolactinoma Tx
only pituitary tumor for which Tx is primarily medical, DOC bromocriptine, surgery if symptoms persist