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Chapter31
Diabetes Mellitus
46
Medical
Professional
09/26/2011

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Term
Drugs that can cause Dysglycemia
Definition
Atypical antipsychotics, BBs, Diazoxide, glucocorticoids, interferon alfa, INH, Niacin, Pentamidine, Protease inhibitors, Tacrolimus, Thiazide or loop diuretics
Term
3 ways to diagnose diabetes?
Definition
1) Casual plasma glucose > 11.1 mmol/L at any time of day in presence of symptoms ( polyuria, polydipsia, unexplained weight loss)

2) FPG > 7mmol/L (8 hour fast)

3) plasma glucose > 11.1 mmol/L 2 hours after a 75 g oral glucose load
Term
Approach to patients T1DM ?
Definition
Initiate insulin
Term
Approach T2DM with A1C < 9% ?
Definition
Lifestyle modifications first, if goal not met within 2 months (A1C < 6.5%) pharmacologic recommended
Term
what are insulin doses based on?
Definition
Carbohydrate intake
Term
Self monitoring of blood glucose recommendations?
Definition
- pre and post parandial measurements

- minimum 3 measurements per day should be performed if on basal bolus regimens
Term
Blood Glucose and exercise
Definition
Exercise usually lowers blood glucose levels, but after extreme intensity it may actually increase BG (a stress response)
Term
Rapid acting Insulins
Definition
Insulin Aspart

Insulin glulisine

Insulin lispro
Term
Long acting insulins
Definition
Insulin detemir

Insulin glargine
Term
Common Diabetic complications

Is intensive treatment or conventional treatment associated with better outcomes?
Definition
Retinopathy, nephropathy, neuropathy

INTENSIVE TREATMENT associated with better outcomes
Term
Intermediate acting Human insulin
Definition
Insulin NPH
Term
Diabetic Ketoacidosis
Definition
http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001363/
Term
"Honeymoon phase"
Definition
In T1DM, after new diagnosis patient may experience periods where requirement for insulin is decreased or transiently eliminated.
Term
When should patients take regular insulin relative to a meal?
Definition
20-30 minutes before
Term
When should a patient take rapid acting insulin relative to a meal?
Definition
Shortly before, but definitely within 20 minutes of a meal
Term
Symptoms of mild hypoglycemia

How to treat mild hypoglycemia?
Definition
Sweating, tremors, tachycardia, hunger, nausea, weakness

Treat with oral source of sugar, 15 grams glucose: (3/4 cup of juice or regular soft drink).

This will increase blood glucose about 2mmol/L in 20 minutes
Term
Severe hypoglycemia symptoms and treatment (conscious and unconscious)
Definition
Neuroglycopenic symptoms: confusion, altered behavior, difficulty speaking... can progress to seizure or coma

If patient is conscious - oral 20 g glucose tablet or equivalent. (Glucose get NOT preferred)

Unconcious patient - 1 mg of SC or IM glucagon, but it is not effective in malnourished or alcohol induced hypoglycemia. Use 50mL of IV dextrose 50% in water in those cases
Term
Cause and result of localized fat hypertrophy
Definition
Cause - frequent use of same injection site

Result - unpredictable adsorption of insulin from that site
Term
Allergic reactions from insulin?
Definition
Urticaria, angioedema, rashes, local erythema are all RARE... switching to a different manufacturer may help.
Term
T1DM patient taking non-human insulin develops immune mediated insulin resistance, what do you do?
Definition
Switch to insulin NPH (concentrated 500 U/mL)
Term
T2DM, monotherapy with what is recommended if patient A1C <9% but hyperglycemic for 2-3 months
Definition
Metformin!
Term
T2DM with A1C > 9% what to initiate?
Definition
Metformin with another agent OR initiate insulin. If patient takes 2 oral agents and is still not at target within 6-12 months, consider adding bedtime insulin (preferred), or a 3rd agent
Term
managing T2DM with symptomatic hyperglycemia and metabolic decompensation?
Definition
Initiate Insulin with or without metformin
Term
Biguanide

role?

Important note concerning imaging contrast agents or pre-op
Definition
Biguanides - Metformin

- First line for new diagnosis of T2DM

- HELD pre-op or before given contrast agents because can cause renal failure and increase the risk for lactic acidosis
Term
Dipeptidyl Peptidase-4 inhibitors (DPP-4 inhibitors)

What are they?

How do they work?

Role?
Definition
Dipeptidyl Peptidase-4 inhibitors (DPP-4 inhibitors)

What are they - Saxagliptin & sitagliptin

How do they work: GLP-1 is released in response to food ingestion by endocrine leading to insulin secretion, glucagon suppression, slower gastric emptying, and satiety. DPP-4 is an enzyme that breaks down GLP-1. DPP-4 inhibitors prevent this.

Role - Should be used of sulfonylureas or insulin are inappropriate eg. high risk of hypoglycemia
Term
Sulfonylureas - Insulin secretagogues

What are they?

Action?

What are the first generation?

Side effects? which is worst for these effects?

Place in therapy?
Definition
Sulfonylureas - Insulin secretagogues

What are they - Chlorpropamide, gliclazide, glimepiride, glyburide, tolbutamide

Action - Stimulate basal and meal-stimulated insulin release (obviously only for T2DM).

First generation - tolbutamide, chlorpropamide very poor PK profile and are rarely used

Side effects - hypoglycemia and weight gain --> Glyburide is the worst

Place in therapy: Second line either as add on to metformin, or monotherapy when contraindicated to metformin.
Term
Meglitinides - secretagogues

What are they ?

How the they work vs sulfonylureas?
Definition
Meglitinides - secretagogues

What are they - Nateglinide, repaglinide

How the they work vs sulfonylureas - shorter actions therefore need to be dosed immediately before meals. Advantageous in that if a patient knows they are going to miss a meal, they can avoid taking these.
Term
Thiazolidinediones (TZDs)

What are they ?

How do they work?

Side effects? What condition would you want to avoid use in due to these side effects?
Definition
Thiazolidinediones (TZDs)

Pioglitazone & Rosiglitazone

Increase insulin sensitivity and so lowers both blood glucose and insulin level.

Low risk of hypoglycemia

Associated with weight gain due to fat deposition, fluid retention, and edema --> watch out for HF and ischemic heart disease
Term
effect of antihyperglycemic agents over time? Important of what medication, following this?

When should insulin be initiated in T2DM?
Definition
Oral antihyperglycemics lose their effectiveness over time, INSULIN becomes important as well in T2DM

Initiate insulin in T2DM:

- maximum tolerated dose of oral agent, yet A1C > 7%

- Initial diagnosis A1C >9%

- End organ damage (CKD) renders oral agents ineffective

- preconception and in pregnancy
Term
Insulin dosing (approximately_

T1DM?

T2DM?
Definition
Insulin dosing (approximately_

T1DM - approx 0.5 U/kg

T2DM - approx 1 U/kg
Term
Targets for glucose Control > 13 years old

A1C ?

FPG?

2 hour PPG?
Definition
Targets for glucose Control > 18 years old

A1C < 7%

FPG 4-7 mmol/L

2 hour PPG 5-10 mmol/L
Term
Targets for glucose Control: 6 - 12 years old

A1C ?

FPG?

2 hour PPG?
Definition
Targets for glucose Control: 6 - 12 years old

A1C < 8%

FPG 4 - 10 mmol/L

2 hour PPG - NOT RECOMMENDED
Term
Targets for glucose Control: 6 - 12 years old

A1C ?

FPG?

2 hour PPG?
Definition
Targets for glucose Control: 6 - 12 years old

A1C < 8%

FPG 4 - 10 mmol/L

2 hour PPG - NOT RECOMMENDED
Term
Targets for glucose Control: < 6 years old

A1C ?

FPG?

2 hour PPG?
Definition
Targets for glucose Control: < 6 years old

A1C < 8.5%

FPG: 4-12 mmol/L

2 hour PPG - NOT RECOMMENDED
Term
Goal A1C in pre-pregnancy counseling?
Definition
A1C < 7% ( same as usual)
Term
When should women begin taking folic acid?
Definition
If planning pregnancy, 3 months prior to conception, take during pregnancy, and until 6 months postpartum
Term
T2DM woman wants to become pregnant, what should be done with her medications?
Definition
Switch her medications from oral to Insulin to avoid possible teratogens
Term
In a pregnant woman a 1h PG after a 50 gram glucose load. What is normal, what is indicative of GDM ?
Definition
1hPG < 7.8 mmol/L is normal

1hPG > 10.3 mmol --> GDM

1hPH 7.8 - 10.2 mmol/L Do further testing.... a 75g OGTT and measure FPG, 1hPG, and 2hPG.

If 2 or more of: FPG >5.3, 1hPG > 10.6 or 2hPH >8.9 --> GDM, if not, just impaired glucose tolerance of pregnancy (IGM)
Term
First line in GDM? If T2DM, and cannot take insulin ?
Definition
First line in GDM - Insulin with lifestyle modifications. Consider glyburide if cannot take insulin because glyburide does not cross the placenta. Metformin is another option/
Term
Glycemic targets in pregnancy

A1C ?

FPG?

2 hour PPG?
Definition
Glycemic targets in pregnancy

A1C < 6%

FPG 3.8 - 5.2 mmol/L

2 hour PPG 5 - 6.6 mmol/L
Term
Insulin monitoring in pregnant women?
Definition
NORMAL. It does cross placenta, but is degraded in GI tract before becoming systemic. Important to monitor w vigilance after delivery, as requirements may change drastically
Term
Diabetic Ketoacidosis

Why do it happen?

Symptoms?

Management
Definition
Diabetic Ketoacidosis

Not enough calories from carbs so body breaks down fat. One byproduct of fat breakdown is ketones. Build up of ketones to the extent that it is being built faster than excreted is ketoacidosis.

Symptoms - hyperglycemia, volume depletion, ketones in urine, depressed consciousness, and depleted electrolytes.

Management - Replenish electrolytes & fluids, Insulin ( NOT if K+ is < 3.3 as this will drive K+ into cells lowering it further), bicarbonate.
Term
Rapid acting human insulin
Definition
Insulin Regular
Term
Sulfonylurea contraindications?
Definition
T1DM, Pregnancy
Term
Metformin - weight gain ?

Contraindications?
Definition
Metformin - NO weight gain!

Contraindications - hepatic or renal impairment, or previous lactic acidosis
Term
what patients to avoid with TZDs - pioglitazione and rosiglitazone
Definition
Avoid in patients with HF, increase risk of pregnancy if no contraception used.

Rosiglitazone - pt. consent is required if have heart disease
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