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Beta cells of islet of langerhans in pancreas
- normally produce insulin which is necessary for cellular utiliation of glucose by most body cells
- enhances use of glucose
- lowers blood sugar
- increases converstion of glucose to glycogen for storage
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alpha cells of pancreas
- produce glucagon which ^ blood sugar
- work together to maintain a normal blood sugar of 70-110 mg/dL
- A1C of <7%
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"pre-diabetes"
- fasting BG 120-125
- need to LOOSE WEIGHT!
- may be started on metformin
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type 1
- requires exogenous insulin replacement therapy
- destroyed pancreatic cells (autoimmune disorder)
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type 2
- usually sufficient insulin produced but may require insulin if needed
- genetic predisposition
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primary sx
- hyperglycemia
- classic triad of polyuria, polydipsia, polyphagia
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polyuria
blood becomes hypertonic: Pulls water in-now gotta pee!
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polydipsia
tissue (cell) dehydrated bc water is being pulled to vessels, so therefore become thirsty
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polyphagia
swallowing (eating) a lot bc body thinks it needs more glucose bc pt keeps peeing it out
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"sliding scale"
- usually done ac & hs for pt who is eating & q6h for pt who is NPO
- most commonly "regular insulin" (short acting)
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insulin
- lowers BG
- primary SE: hypoglycemia (diaphoresis, weakness, pale and cool, etc.)
- s/sx masked in pt on beta blockers
- rotate sites to prevent lipodystrophy
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somogyi effect
rebound hyperglycemia
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rapid acting (insulin)
- Onset: 15 min.
- Duration: 3-6 hrs
- Humalog, Novalog, Apidra
- given immediately before or after meals
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short-acting
- Regular insulin (Humulin R, Novolin R0
- CLEAR
- ONLY insulin that can be given IV
- most common for "sliding scale"
- SQ onset: 30 min.
- peak: 2-3 hrs
- duration 5-7 hrs.
- IV: onset & peak: 10-30 min.
- Duration: 1/2-1 hr
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Intermediate
- NPH (Humalin N, Novalin N)
- (only) CLOUDY insulin
- commonly ordered for daily injection
- Onset: 1-2 hr
- Peak: 4-8 hr
- Duration: 10-18 hr
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Long Acting
- Glargne (Lantus) & (Levemir)
- given 1X day usually but can be given q12h
- lasts 24 hrs
- CLEAR
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Combination insulin
- intermediate w/ rapid or intermediate w/ short
- Humulin 70/30
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s/sx of hypoglycemia
- need immediate simple sugar and complex CHO & protein
- anything that raises BG-increase the need for insulin
- most common reason diabetic gets sick: ^ glucose
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oral hypoglycemic agents
- ARE NOT oral insulin
- help pancreas make insulin or make insulin receptors
- primary SE: if drug works on pancreas, is hypoglycemia
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Biguanide
- metformin
- first line drug & most commonly ordered oral agent
- works by lowering glucose production by liver, decrease GI absorption, ^ receptor sensitivity
- risk for lactic acidosis
- serious diarrhea is short-term
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Sulfonylureas
- work on pancreas to increase secretion of insulin
- SE: hypoglycemia
- "ide" family
- glipizide, etc.
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Alpha-Glucosidase Inhibitors
- inhibit enzymes in GI tract
- SE: GI distress
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Glitazones
- Avandia off market soon
- ^risk heart attactks & HF
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Meglitinide
- "glinide" drugs
- short acting
- good for post prandial (after eating)
- hyperglycemia-stimulate pancreatic secretion of insulin-->risk for hypoglycemia
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Amylin & Incretin mimetics
response to food-suppress glucagon, slow gastric emptying, increase satiety, controls weight loss
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1. Gliptins
2. Byetta
- 1. ^incretin levels
- 2. "lizard spit" medicine SQ. type 2 only. pancreatitis is risk
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Raise BG
- Glucagon-parental injection
- D50W: given IV push
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