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72 Cards in this Set

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AP II DIABETES
AP II DIABETES
What is the pathophysiology of hyperthroidism?
Excessive secretion of T3, T4 or both.
Causes of hyperthyroidism?
1. Graves disease
2. TSH secreting pituitary tumors
3. iatrogenic
4. thyroiditis
Symptoms of hyperthyroidism?
1. wt. loss
2. fatigue
3. arrhythmias
4. anxiety
Treatment of hyperthyroidism?
1. medical: antithyroids, beta antagonists
2. surgical: thyroidectomy
Thyrotoxic crisis
Hyperthyroidism caused by trauma, infection, or surgery.
When does thyrotoxic crisis usually appear?
In post-op period
Symptoms of thyrotoxic crisis?
1. anxiety
2. fever
3. tachycardia
4. cardiovascular instability
Treatments of thyrotoxic crisis?
1. immediate--> supportive
2. decrease circulating hormone levels.
Hypothyroidism pathyphysiology
1. primary: destruction of thyroid tissue.

2. hypothalamic-pituitary axis dysfunction.
Symptoms of hypothyroidism?
1. lethargy
2. wt. gain
3. cold intolerance
4. hypoactive reflexes
Treatment?
PO T4 (synthroid)
What are the perioperative considerations?
.




.
Function of parathyroid hormone?
1. increases serum Ca
2. dec. serum PO4

NOTE: there are 4 small glands
Pathophysiology of hyperparathyroidism?
1. primary: adenoma, carcinoma, hyperplasia of parathyroid glands.

2. secondary: compensatory inc. in PTH secretion due to hypocalcemia (by renal disease or GI malabsorption).
Symptoms of hyperparathyroidism?
1. renal stones
2. hypertension
3. constipation
4. fatigue

NOTE: usually due to hypercalcemia
Tx of hyperparathyroidism?
Medical or surgical
Pathophysiology of hypoparathyroidism?
1. decreased PTH

NOTE: almost always iatrogenic)
Symptoms of hypoparathyroidism?
From hypocalcemia
NOTE: hypercalcemia's effect on the body?
1. skeletal muscle weakness
2. kidney stones
3. anemia
4. systemic HTN
5. vomiting
6. peptic ulcer
7. calcifications in ocular region
Chvostek's Sign
Due to hypocalcemia

Abnormal rxn to stimulation of Facial Nerve.
Trousseau's sign
Due to hypocalcemia also.

Spasm of the hand and forearm.
Hypoplasia
Incomplete development of tissue or organ.
Pathyophysiology of DiGeorge syndrome
Hypoplasia/aplasia of parathyroid and thymus

Congenital thymic hypoplasia
What does the adrenal cortex synthesize?
1. glucocorticoids (cortisol)
2. minerocorticoids (aldosterone)
3. androgens
What does the adrenal medulla synthesize?
NorEpi

Epin

Dopamine
Glucocorticoid excess and its pathyophysiology
1. Cushing's syndrome

2. excessive cortisol
Symptoms of glucocorticoids excess:
1. obesity
2. HTN
3. muscle wasting and weakness
4. glucose intolerance
Treatment of glucocorticoids excess?
1. radiotherapy

2. transsphenoidal resection
Pathophysiology of Primary Hyperaldosteronism (Conn Syndrome)
Excessive secretion of aldosterone usually by tumor.
Symptoms of Conn Syndrome?
1. headache
2. muscle cramps
3. metabolic alkalosis
Pathophysiology of adrenocorticoid deficiency?
1. primary--> Addison's dz

2. secondary--> cortisol deficiency with normal aldosterone).
Symptoms of adrenocorticoid deficiency?
1. hypotension
2. hyponatremia
3. hypovolemia
4. hyperkalemia
5. fatigue
Treatment?
Steroid adm.
Pathophysiology of pheochromocytoma?
Catecholamine secreting tumor of adrenal medulla
Symptoms of pheochromocytoma?
1. sudden onset of malignant HTN.
2. cardiac dysrhythmias
3. headache
4. perspiration
Tx?
Excision
Periop considerations?
Hemodynamic instability
Cause of acromegaly?
Excessive GH
Diabetes Insipidus pathophysiology?
Deficiency or resistance of vasopressin (ADH).
Symptoms of DI?
1. extreme thirst
2. excessive urination
Cause of Diabetes Mellitus
Caused by abnormal glucose metabolism.
Innervation causing insulin inhibition?
Sympathetic T5-T10
Innervation causing insulin release?
Parasympathetic via vagus
Effects of insulin
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.
Effects of glucagon
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.
Causes of DM?
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
Symptoms of DM?
1. polyurea
2. polydypsia (thirst)
3. polyphagia (excessive hunger)
4. wt loss
5. asthenia (weakness)
6. sweet breath
7. genital pruritis
8. vision impairment
Long term complications of DM?
1. HTN
2. CAD
3. MI
4. CHF
5. diastolic dysfunction
6. vascular disease
7. neuropathy
8. renal failure
Acute complications of DM?
1. diabetic ketoacidosis (DKA)
2. hyperosmolar nonketotic coma
3. hypoglycemia
End Organ Pathology on heart due to DM?
1. CHF
2. CAD
End Organ Pathology on vasculature due to DM?
HTN

Atherosclerosis
End Organ Pathology on kidneys due to DM?
Dec. GFR
Other End Organ Pathology on due to DM?
1. bladder
2. GI
3. eyes
4. lower extremeties
5. joints
What is the cause of diabetic ketoacidosis (DKA)?
Dec. insulin activity--> metabolism of FA--> accum. of organic acids by products.
Clinical signs of DKA?
1. tachypnea
2. abdominal pain
3. fatigue
4. polyuria
5. N/V
6. altered mental status
Tx?
No Lactated Ringer
What is Hyperosmolar Nonketotic Coma?
Hyperglycemic diuresis that results in dehydration and hyperosmolality.
Symptoms of hyperosmolar nonketotic coma?
1. high blood sugar
2. thirst
Tx?
1. insulin
2. hypotonic saline
Causes of hypoglycemia?
Caused by insulin > Carbo intake

blood glucose < 50 mg/dL
Treatment for hypoglycemia?
D50 IV with glucose
Drug therapy in DM?
Insulin: IV

Oral hypoglycemics
Oral hypoglycemics
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.
Treatment for Type II?
1. agents that would increase release of insulin.
2. agents ... inc. receptor sensitivity.
3. agents... dec absorption rate of glucose from GI tract.
INTRAoperative control of serum glucose?
Start treating at > 150 mg/dL
Bolus adm for Tx of DM during preop?
D5W (1.5 cc/kg/hr) + NPH insulin (half the usual AM dose)
Bolus adm for Tx of DM during intraop?
Regular insulin

1 Unit will lower plasma glucose by 25-30 mg/dL
Bolus adm for Tx of DM during postop?
Same as intraop
Continuous infusion for Tx of DM during preop?
D5W (1cc/kg/hr) + regular insulin

1U/hr = plasma glucose/150
Continuous infusion for Tx of DM during intraop?
Same as preop
Continuous infusion for Tx of DM during postop?
Same as preop