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- Francine Ratner Kaufman, M.D.
- Distinguished Professor of Pediatrics
- The Keck School of Medicine of USC
- Head, Center for Diabetes and Endocrinology
- Childrens Hospital Los Angele
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2
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3
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- Incidence increasing by 3.4% per year
- 50% of patients diagnosed before age 20 years
- 50% of patients diagnosed after age 20 years
- Often mistaken for type 2 diabetes—may make up 10% to 30% of
individuals diagnosed with type 2 diabetes
- Oral agents ineffective; insulin therapy required
- Autoimmune process slower and possibly different
- Can usually be confirmed by beta cell antibodies
- Loss of c-peptide
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4
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- Symptoms of diabetes Polyuria, polydipsia, polyphagia, diabetic
- plus ketoacidosis (DKA)
- Random plasma glucose ³200
mg/dL*
- Fasting plasma glucose (FPG) ³126 mg/dL*
- Oral glucose tolerance
test (OGTT) with 2-hour value ³200 mg/dL*
- Loss of c-peptide c-peptide<0.8
ng/dL
- Presence of islet autoantibodies GADA, ICA, IA-2A, IAA
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5
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6
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15
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- Basal insulin
- Controls glucose production between meals and overnight
- Near-constant levels
- Usually ~50% of daily needs
- Bolus insulin (mealtime or prandial)
- Limits hyperglycemia after meals
- Immediate rise and sharp peak at 1 hour postmeal
- 10% to 20% of total daily insulin requirement at each meal
- For ideal insulin replacement therapy, each component should come from a
different insulin with a specific profile or via an insulin pump (with
one insulin)
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- More frequent decision making, testing, and insulin dosing
- Allows for variable food consumption based on hunger level
- Ability to skip meal or snack if desired (bedtime)
- Reduced variability of insulin absorption
- Easy to adapt to acute changes in schedule (exercise, sleeping in on
weekends)
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- Insulin pens
- Faster and easier
than syringes
- Improve patient attitude and adherence
- Have accurate dosing mechanisms, but inadequate resuspension of NPH may
be a problem
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- For motivated patients
- Expensive
- External, programmable pump connected to an indwelling subcutaneous
catheter
- Only rapid-acting insulin
- Programmable basal rates
- Bolus dose without extra injection
- New pumps with dose calculator function
- Bolus history
- Requires support system of qualified providers
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- Intensive therapy/tight control for otherwise healthy elderly patients
- Less strict glycemic goals for elderly patients with severe
complications or comorbidities or with cognitive impairment
- FPG <140 mg/dL
- PPG <220 mg/dL
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- Erratic eating (quantities)
- Erratic timing of meals
- Renal impairment
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- Lack of thirst perception predisposes to hyperosmolar state
- Confusion of polyuria with urinary incontinence or bladder dysfunction
- Increased risk of and from hypoglycemia
- Altered perception of hypoglycemic symptoms
- Susceptibility to serious injury from falls or accidents
- Compounding of diabetic complications by effects of aging
- Frequent concurrent illnesses and/or medications
- More frequent and severe foot problems
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48
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49
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50
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- Benefits of continuous glucose monitoring
- More complete glucose profile than with traditional SMBG
- Tracking of meal-related glycemic trends
- Detection of nocturnal hypoglycemia
- Facilitation of changes in insulin regimens
- Alarm for highs and lows (GlucoWatch)
- Remaining challenges
- Daily SMBG still required
- Not suited to many patients
- Limited accuracy, especially for hypoglycemia
- Glycemic pattern results confusing, subject to interpretation
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52
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- Minimally invasive continuous glucose monitors
- Implanted glucose sensors
- Implanted insulin pumps
- “Closed-loop” systems
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53
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- 7 Type 1 Patients, Aged 29 to 54 Years, With History of Severe
Hypoglycemia and Metabolic Instability
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54
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