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72 Cards in this Set
- Front
- Back
AP II DIABETES
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AP II DIABETES
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What is the pathophysiology of hyperthroidism?
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Excessive secretion of T3, T4 or both.
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Causes of hyperthyroidism?
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1. Graves disease
2. TSH secreting pituitary tumors 3. iatrogenic 4. thyroiditis |
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Symptoms of hyperthyroidism?
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1. wt. loss
2. fatigue 3. arrhythmias 4. anxiety |
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Treatment of hyperthyroidism?
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1. medical: antithyroids, beta antagonists
2. surgical: thyroidectomy |
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Thyrotoxic crisis
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Hyperthyroidism caused by trauma, infection, or surgery.
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When does thyrotoxic crisis usually appear?
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In post-op period
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Symptoms of thyrotoxic crisis?
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1. anxiety
2. fever 3. tachycardia 4. cardiovascular instability |
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Treatments of thyrotoxic crisis?
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1. immediate--> supportive
2. decrease circulating hormone levels. |
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Hypothyroidism pathyphysiology
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1. primary: destruction of thyroid tissue.
2. hypothalamic-pituitary axis dysfunction. |
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Symptoms of hypothyroidism?
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1. lethargy
2. wt. gain 3. cold intolerance 4. hypoactive reflexes |
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Treatment?
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PO T4 (synthroid)
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What are the perioperative considerations?
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.
. |
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Function of parathyroid hormone?
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1. increases serum Ca
2. dec. serum PO4 NOTE: there are 4 small glands |
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Pathophysiology of hyperparathyroidism?
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1. primary: adenoma, carcinoma, hyperplasia of parathyroid glands.
2. secondary: compensatory inc. in PTH secretion due to hypocalcemia (by renal disease or GI malabsorption). |
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Symptoms of hyperparathyroidism?
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1. renal stones
2. hypertension 3. constipation 4. fatigue NOTE: usually due to hypercalcemia |
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Tx of hyperparathyroidism?
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Medical or surgical
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Pathophysiology of hypoparathyroidism?
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1. decreased PTH
NOTE: almost always iatrogenic) |
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Symptoms of hypoparathyroidism?
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From hypocalcemia
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NOTE: hypercalcemia's effect on the body?
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1. skeletal muscle weakness
2. kidney stones 3. anemia 4. systemic HTN 5. vomiting 6. peptic ulcer 7. calcifications in ocular region |
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Chvostek's Sign
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Due to hypocalcemia
Abnormal rxn to stimulation of Facial Nerve. |
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Trousseau's sign
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Due to hypocalcemia also.
Spasm of the hand and forearm. |
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Hypoplasia
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Incomplete development of tissue or organ.
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Pathyophysiology of DiGeorge syndrome
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Hypoplasia/aplasia of parathyroid and thymus
Congenital thymic hypoplasia |
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What does the adrenal cortex synthesize?
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1. glucocorticoids (cortisol)
2. minerocorticoids (aldosterone) 3. androgens |
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What does the adrenal medulla synthesize?
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NorEpi
Epin Dopamine |
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Glucocorticoid excess and its pathyophysiology
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1. Cushing's syndrome
2. excessive cortisol |
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Symptoms of glucocorticoids excess:
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1. obesity
2. HTN 3. muscle wasting and weakness 4. glucose intolerance |
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Treatment of glucocorticoids excess?
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1. radiotherapy
2. transsphenoidal resection |
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Pathophysiology of Primary Hyperaldosteronism (Conn Syndrome)
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Excessive secretion of aldosterone usually by tumor.
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Symptoms of Conn Syndrome?
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1. headache
2. muscle cramps 3. metabolic alkalosis |
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Pathophysiology of adrenocorticoid deficiency?
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1. primary--> Addison's dz
2. secondary--> cortisol deficiency with normal aldosterone). |
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Symptoms of adrenocorticoid deficiency?
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1. hypotension
2. hyponatremia 3. hypovolemia 4. hyperkalemia 5. fatigue |
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Treatment?
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Steroid adm.
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Pathophysiology of pheochromocytoma?
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Catecholamine secreting tumor of adrenal medulla
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Symptoms of pheochromocytoma?
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1. sudden onset of malignant HTN.
2. cardiac dysrhythmias 3. headache 4. perspiration |
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Tx?
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Excision
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Periop considerations?
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Hemodynamic instability
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Cause of acromegaly?
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Excessive GH
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Diabetes Insipidus pathophysiology?
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Deficiency or resistance of vasopressin (ADH).
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Symptoms of DI?
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1. extreme thirst
2. excessive urination |
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Cause of Diabetes Mellitus
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Caused by abnormal glucose metabolism.
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Innervation causing insulin inhibition?
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Sympathetic T5-T10
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Innervation causing insulin release?
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Parasympathetic via vagus
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Effects of insulin
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1. inc glucose uptake by cells or decrease blood glucose.
2. inc glycogen synthesis 3. inc protein synthesis and storage. 4. inc fath synthesis and storage 5. dec gluconeogenesis Insulin favors storage over making new glucose. |
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Effects of glucagon
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1. inc glucose output from liver
2. inc glycogenolysis 3. inc gluconeogenesis (from a.a) 4. inc adipose cell lipase Basically, it favors making new glucose over storage. |
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Causes of DM?
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1. dec. secretion of insulin from beta cells (Type I)
2. inc. resistance of receptors to insulin (Type II) NOTE: 5-10% are of TYPE I 90% TYPE II 2-3% Gestational |
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Symptoms of DM?
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1. polyurea
2. polydypsia (thirst) 3. polyphagia (excessive hunger) 4. wt loss 5. asthenia (weakness) 6. sweet breath 7. genital pruritis 8. vision impairment |
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Long term complications of DM?
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1. HTN
2. CAD 3. MI 4. CHF 5. diastolic dysfunction 6. vascular disease 7. neuropathy 8. renal failure |
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Acute complications of DM?
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1. diabetic ketoacidosis (DKA)
2. hyperosmolar nonketotic coma 3. hypoglycemia |
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End Organ Pathology on heart due to DM?
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1. CHF
2. CAD |
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End Organ Pathology on vasculature due to DM?
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HTN
Atherosclerosis |
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End Organ Pathology on kidneys due to DM?
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Dec. GFR
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Other End Organ Pathology on due to DM?
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1. bladder
2. GI 3. eyes 4. lower extremeties 5. joints |
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What is the cause of diabetic ketoacidosis (DKA)?
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Dec. insulin activity--> metabolism of FA--> accum. of organic acids by products.
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Clinical signs of DKA?
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1. tachypnea
2. abdominal pain 3. fatigue 4. polyuria 5. N/V 6. altered mental status |
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Tx?
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No Lactated Ringer
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What is Hyperosmolar Nonketotic Coma?
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Hyperglycemic diuresis that results in dehydration and hyperosmolality.
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Symptoms of hyperosmolar nonketotic coma?
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1. high blood sugar
2. thirst |
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Tx?
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1. insulin
2. hypotonic saline |
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Causes of hypoglycemia?
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Caused by insulin > Carbo intake
blood glucose < 50 mg/dL |
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Treatment for hypoglycemia?
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D50 IV with glucose
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Drug therapy in DM?
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Insulin: IV
Oral hypoglycemics |
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Oral hypoglycemics
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Treat diabetes mellitus by lowering glucose levels in the blood. With the exceptions of insulin, exenatide, and pramlintide, all are administered orally and are thus also called oral hypoglycemic agents or oral antihyperglycemic agents.
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Treatment for Type II?
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1. agents that would increase release of insulin.
2. agents ... inc. receptor sensitivity. 3. agents... dec absorption rate of glucose from GI tract. |
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INTRAoperative control of serum glucose?
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Start treating at > 150 mg/dL
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Bolus adm for Tx of DM during preop?
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D5W (1.5 cc/kg/hr) + NPH insulin (half the usual AM dose)
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Bolus adm for Tx of DM during intraop?
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Regular insulin
1 Unit will lower plasma glucose by 25-30 mg/dL |
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Bolus adm for Tx of DM during postop?
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Same as intraop
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Continuous infusion for Tx of DM during preop?
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D5W (1cc/kg/hr) + regular insulin
1U/hr = plasma glucose/150 |
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Continuous infusion for Tx of DM during intraop?
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Same as preop
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Continuous infusion for Tx of DM during postop?
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Same as preop
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