Ch. 52 - Antidiabetics Flashcards
Insulin:
Secreted by:
-beta cells of the islets of Langerhans in pancreas
Normal Glucose Ranges (1):
- ) Blood glucose
- 60-100 mg/dL
- ) Serum (plasma) glucose
- 70-110 mg/dL
3.) > 180mg/dL glycosuria (glucose spills into urine)
Normal Glucose Ranges (2):
HbA1C:
-Average glucose level up to 3 mos(months)
-Goal = keep HbA1C Below 7%
Insulin Therapy (1):
- ) Dosage = measured in units
- ) Insulin syringes (orange cap)
- ) U-100 = 100 units of insulin per milliliter
Insulin Therapy (2):
- ) U-500 = 500 units / mL
- ) Need prescription (but not for U-100)
- ) Need doses > 200 units insulin daily
Insulin Therapy (3):
- ) 10 mL vials
- ) Store in refrigerator
- ) Avoid extreme temps
Routes of Administration (1):
- ) SC
- ) Insulin pen = SC
- More accurate, more expensive
- Less painful
Routes of Administration (2):
3.) IV (REGULAR type only)
- ) Insulin pump (REGULAR type only)
- Implantable
- Portable
Insulin Pump:
- ) More effective than multiple injections
- ) Constant amt of insulin
- ) More expensive
4 Types of Insulin:
1.) Rapid acting
2.) Short acting
3.) Intermediate acting
4.) Long acting
(Combination)
Rapid Acting (1):
1.) lispro (Humalog)
2.) insulin aspart (NovoLog)
Ex: ^^^
Rapid Acting (2):
- ) Onset of Action
- 5-15 min - ) Peak Action:
- Humalog: 30-90 min
- NovoLog: 1-3 hrs
Rapid Acting (3):
- ) Duration:
- Humalog: 2-5 hrs
- NovoLog: 3-5 hrs - ) Appearance = clear
- ) Administer:
- 5 min before meals
- *Ex: Make sure breakfast trays are infront of p/t first before giving insulin
- 5 min before meals
Short Acting = Regular (1):
Insulin Regularrrr =
- Humulin R - Novolin R
Short Acting = Regular (Humulin R) - 2:
- ) Onset: 30 min
- ) Peak: 2.5 – 5 hrs
- ) Duration 6 – 8 hrs
Short Acting = Regular (Humulin R)- 3:
- ) Appearance clear
- ) Administer: ~30 min b4 meal
- ) ***ONLY type of insulin that can be given IV!!
Intermediate Acting (1):
insulin **NPH (N):
-**Humulin N, Novolin N
Intermediate Acting (2) - NPH (Humulin N):
- ) Onset: 1 – 2 hrs
- ) Peak: 6 – 12 hrs
- ) Duration 18 – 24 hrs
Intermediate Acting (3): - NPH (Humulin N)
- ) Appearance: Cloudy
5. ) Administer: 1 hr before breakfast
Long Acting (1):
- glargine (Lantus)
- Vial (purposely different) – tall, narrow vial
Long Acting - glargine (Lantus) (1):
- ) Onset: about 1 hr
2. ) Duration: 24 hr coverage WITHOUT a peak
Long Acting - glargine (Lantus) (2):
- ) Appearance: clear
- ) Administer: given at HS (bedtime)
- ) DO NOT MIX with any other insulins
Combination Products:
Reg & (intermediate acting):
- 70% NPH & 30% Reg - 50% NPH & 50% Reg -B.i.d before meals
Adverse Effects of Insulin:
Hypoglycemia!
- ) Hypoglycemic (insulin) reaction
- ) May be d/t:
- Omitting / irreg scheduled meals
- Increase exercise
- Administration errors
Hypoglycemic (insulin) Reaction: S/S:
Sweating, confusion, tachycardia, HA(headache), hunger, weakness:
= Coma, death
Blood sugar level
Hypoglycemic (insulin) Reaction: Tx:
Glucose:
- Oral
- Parenteral (if unconscious) = Glucagon
Insulin Lipodystrophy:
Prevent:
*Rotate sites
*Massage site after injection
Insulin Resistance:
Need for higher doses of insulin
Coverage Orders (Sliding Scale):
- ) Additional insulin to ‘cover’ increased blood sugar levels
- ) Based on blood glucose levels
- ) Rapid or Short acting insulin used
Coverage Orders (Sliding Scale) -EXAMPLE
Blood Glucose Level —— Regular Insulin order
0-180 mg/dL No coverage
181-240 mg/dL 2 units SC
241-300 mg/dL 4 units SC
Administration of Insulin (1):
- ) Always use Insulin syringe!
2. ) U-100 syringes = 100 units / mL
Administration of Insulin (2):
- ) Lo-dose syringes
- 30 unit syringes
- 50 unit syringes
4.)For smaller doses of insulin
Injection Sites:
Client:
- Thigh
- Abdomen = (fastest absorption)
- Both easier to self-inject
Rotate Sites!:
- ) Injecting into an infrequently used site :
- May cause hypoglycemia
- ) Establish rotation pattern
- ) Keep track, document site used
Measuring 2 Types of Insulin in Same Syringe (1):
- ) Gently roll longer acting insulin vial {NEVER shake!}
- ) Clean both stoppers on vials
- ) Inject appropriate amt of air into longer acting insulin (do not withdraw insulin yet!)
Measuring 2 Types of Insulin in Same Syringe (2):
4.) Inject appropriate amt of air & WITHDRAW insulin from short acting (Regular) insulin
THEN –>
5.) Withdraw longer acting (Intermediate) insulin
Measuring 2 Types of Insulin in Same Syringe (3):
- ) After mixing Regular & Intermediate insulin:
- ) Adm WITHIN 30 MIN
- ) Intermediate insulin will alter functioning of Regular insulin
Hypoglycemic reaction (insulin shock) vs Diabetic Ketoacidosis (hyperglycemic reaction):
If unsure = Tx for insulin reaction
-Glucose (better if glucose is elevated than dropped)
Hypoglycemic Reaction (insulin shock) (1):
- ) Able to swallow:
2. ) Rapidly absorbed sugar = OJ, sugar containing drink, hard candy
Hypoglycemic Reaction (insulin shock) (2):
3.) Unable to swallow –> Glucagon injection
Glucagon:
- SQ, IM, IV
* Tx: insulin-induced hypoglycemia
Hypoglycemic Reaction (insulin shock) (3):
- ) Should recover within 15 min –>
5. ) No response –> contact physician–> emergency department
Hypoglycemic Reaction (insulin shock) (4):
6.) Fasting = do not give insulin!!
Teach Self-Care Skills!:
- ) Insulin administration
- ) Blood glucose monitoring
- ) Foot care
- ) Diet
Teach Self-Care Skills cont:
- ) Exercise
- ) Medic-alert ID
- ) S/S hypo-hyperglycemia
Oral Antidiabetic Drugs (1):
- ) Stimulate pancreatic beta cells to secrete insulin
2. ) Need some pancreatic function
Oral Antidiabetic Drugs (2):
3.) Type 2 diabetes (NIDDM) = DO NOT respond to diet alone
Oral Antidiabetic Drugs (3):
- ) Best respond:
- Dx after age 40
- Not overweight
- Need
Sulfonylureas (1st & 2nd Generations):
Stimulate pancreatic beta cells to secrete insulin
Examples: 1st Generation >
- ) tolbutamide (Orinase)
- Short acting
- ) tolazamide (Tolinase)
- Intermediate acting
- ) chlorpropamide (Diabenese)
- Long acting
2nd Generation Sulfonylureas:
- ) More potent
- ) Greater hypoglycemia potency (why it’s stronger acting)
- ) Longer duration
- ) Fewer SE
Examples – 2nd Generation:
- ) glimepiride (Amaryl)
- ) glipizide (Glucotrol)
- ) glyburide (DiaBeta, Micronase )
Admin:
-1 or more times / day
Adverse Effects:
- Hypoglycemia
- Hepatotoxicity/jaundice
- GI distress
- Hematological disorders
Hypersensitivity Reactions:
Ingesting Alcohol –> Flushing, nausea, palpations
Biguanides:
- ) Decreases hepatic production of glucose from stored glycogen
- ) Reduces the increase in serum glucose after a meal
Biguanides – Example:metformin (Glucophage):
Also increases insulin receptor sensitivity
Admin:
- 500 mg 1-3 times/day with meals - Increases dose gradually
metformin (Glucophage) (1):
S/S:
- ) Does NOT produce hypoglycemia or hyperglycemia
- ) GI effects
- ) Bitter metallic taste
metformin (Glucophage) (2):
- ) Avoid alcohol
5. ) Observe for lactic acidosis
Nursing Interventions – Oral Antidiabetics:
-Adm with food to decrease GI upset
-Monitor bl sugar levels:
Blood glucose = 60-100 mg/dL
Serum glucose = 70-110 mg/dL
Teach (1):
- ) Recognize s/s:
- Hypo- & hyperglycemia
- ) May need insulin:
- Stress, Surgery, Serious infection
Teach (2):
- ) MedicAlert card, tag, bracelet
4. ) Use of glucometer
Diabetes Mellitus (DM):
Deficiency in glucose metabolism
- Caused by:
- Lack of (or)
- Inefficient use of
- Insulin in the body
Two Types of DM:
Type 1:
* Insulin-dependent (IDDM) * No pancreatic reserve of insulin * Need daily insulin therapy
Type 1 (IDDM):
- Wide variations in blood glucose levels
* MORE (1) prone to ketosis (accumulation of ketones in blood)
Type 2 (NIDDM) (2):
- Can be controlled by:
- Wt loss & special diet
- Diet & oral hypoglycemic agents
*LESS (2) likely to develop ketosis