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Transcript of Type 1 Diabetes: Multiple Dose Injections and Pump Therapy Joe Largay, PAC, CDE Clinical Instructor...
![Page 1: Type 1 Diabetes: Multiple Dose Injections and Pump Therapy Joe Largay, PAC, CDE Clinical Instructor Department Of Medicine University Of North Carolina.](https://reader030.fdocuments.us/reader030/viewer/2022032804/56649e455503460f94b3aa88/html5/thumbnails/1.jpg)
Type 1 Diabetes: Multiple Dose Injections
and Pump Therapy
Joe Largay, PAC, CDEClinical InstructorDepartment Of MedicineUniversity Of North Carolina
![Page 2: Type 1 Diabetes: Multiple Dose Injections and Pump Therapy Joe Largay, PAC, CDE Clinical Instructor Department Of Medicine University Of North Carolina.](https://reader030.fdocuments.us/reader030/viewer/2022032804/56649e455503460f94b3aa88/html5/thumbnails/2.jpg)
Learning Objectives:
• Relate physiologic insulin replacement to basal/prandial therapy with Multi-dose Injections (MDI) and insulin pump therapy
• Compare available insulin regimens• Explain the benefits of insulin pump therapy
and identify ideal pump candidates• Discuss how to integrate diabetes
management software into clinical practice
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The Blood Sugar Fairy
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How Your Body Secretes Insulin
Insu
lin
Time
Bolus InsulinBasal Insulin
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Bolus InsulinBasal Insulin
Time
Conventional Insulin TherapyBenefits Two injections per day
(no mealtime bolus injections)
Doses are fixed (no calculations needed)
Disadvantages No flexibility in diet No flexibility in schedule
Doses do not match how a pancreas maintains the insulin/glucose balance
Insu
lin
p.5
Schematic representation only.
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Multiple Daily Injection (MDI) Therapy
Benefits Provides intensive glucose
control More flexible lifestyle Basal and bolus rates can be
calculated separately
Disadvantages
Four to eight injections per day in several different areas of your body
Limited to one or two basal doses per day
Complicated math calculations Bolus doses not always accurate
due to math and guessingLantus® or Levemir®
Insu
lin
Time
Bolus Insulin
Basal Insulin
Humalog®, Novolog® or
Apidra®
Schematic representation only. Humalog is a registered trademark of Eli Lilly and Company. Novalog and Levemir are registered trademarks of Novo Nordisk A/S.Apidra and Lantus are registered trademarks of Sanofi-Aventis US, LLC.
MDI with long acting Basal and Rapid-Acting Insulin
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The Basal-Bolus Insulin Concept
• Basal insulin– Controls glucose production between meals and overnight
– Nearly constant levels
– 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
• Ideal insulin replacement therapy– Combines different insulins, each with specific profiles
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Human Insulins and AnaloguesTypical Times of Action
Insulin Onset of Duration ofPreparations Action Peak ActionAspart / glulisine orlispro ~15 minutes 1–2 hours 4–6 hours
Human regular 30–60 minutes 2–4 hours 6–8 hours
Human NPH/lente 2–4 hours 4–10 hours 12–20 hours
Detemir 2 hours 6-10 hours 18–20 hours
Glargine 2–4 hours Flat ~24 hours
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T1DM Insulin Needs
• Total Daily Insulin Need: ~0.6-0.8 u/kg Total Daily Dose (TDD)
• Basal: ~ 0.3 u/kg (~ 40-50% of TDD)
• Bolus: ~ 50-60% of TDD
• Correction Factor: utilizes insulin sensitivity factor(ISF) to correct for high glucose
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Carbohydrate Counting
•Definition of carb counting
•Sources of carbohydrate
•Portion size
•Insulin to carbohydrate ratio
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Insulin:Carbohydrate Ratio
Based on Weight
weight (lbs.) ratio (units/gram CHO)
100-109 1:16
110-129 1:15
130-139 1:14
140-149 1:13
150-169 1:12
170-179 1:11
180-189 1:10
190-199 1: 9
200+ 1: 8
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THE 450 RULE
Total daily dose grams of cho
covered by 1 unit
20 23
25 18
30 15
35 13
40 11
50 9
60 8
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CHO content of a typical meal
& corresponding insulin dosage
Cheeseburger….…………………………..…30
Potato Chips…………………………………..17
Cookie……………………………………….…20
Apple…………………………………………...15
Diet Coke………………………………….…….0
Total CHO = 82
• 1:15 insulin/CHO ratio = 5.5 units
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Rule of 1700 Correction Factor or
Insulin Sensitivity Factor
1700 divided by Total Daily Dose Insulin equals the amount you would expect 1 unit of insulin to lower glucose
Example: TDD ~48u
1700/48= 35
So this patient’s Insulin Sensitivity = 35
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ISF 0f 35Current BG level before meal
Amount of insulin to add to meal bolus
< 80 -1
80 120 0
121 156 1
157 192 2
193 228 3
229 264 4
265 300 5
Pre meal BG=202Eating 50 gm CHO
CHO ratio 1:10Meal = 5u
CF=3uTotal Insulin Dose=8u
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Continuous Insulin Infusion Pumps
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Varying Insulin Needs Throughout the Day
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.01:
00 A
M
3:00
AM
5:00
AM
7:00
AM
9:00
AM
11:0
0 A
M
1:00
PM
3:00
PM
5:00
PM
7:00
PM
9:00
PM
11:0
0 PM
Hour
Uni
ts/H
our
age 3-10 age 11-20age 21-60 age > 60
Lantus® or Levemir®
Scheiner G, Boyer BA. Diabetes Res Clin Pract.2005;69:14-21.Lantus is a registered trademark of Sanofi aventis Pharmaceuticals, Inc. Levemir is a registered trademark of Novo Nordisk A/S.
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Insulin Pump TherapyInsulin pump therapy more closely mimics a healthy pancreas than injections
Insu
lin
Time
Normal Insulin SecretionInsulin Pump Delivery
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Schematic representation only.
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CSII PumpAdvantage-• most physiologicphysiologic insulin replacement available• more predictablepredictable insulin absorption• acute adjustments in basal rate with temporary basal
setting• Can match the insulin to carb more accurately with bolus
calculator• reduced risk for hypoglycemia• ability to stabilize pre exercise glucose • Requires one “injection” every 3 days
Disadvantage-• Must wear pump 24 hours a day (does allow disconnect for
short periods)• Potential problems if not monitoring regularly
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Individualized Insulin Therapy
Dawn phenomenon Low glucose levels
at night
Slow digestion
Programmable Settingsfor Specific Medical Needs
Programmable Settingsfor Lifestyle Flexibility
Meal and snack timing
Food choices
Sick days
Exercise
Weekday vs weekend
Shiftwork
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Pump Basics
Animas
Medtronic
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The OmniPod System Insulin pump therapy with two wireless
components• Fully Integrated 2 Part Design
• User Interface• Full Text Navigation
• Set-up Wizard
• Reduced Complexity
• Automated Cannula Insertion• No Sharps
• Reservoir Volume Feedback
• Occlusion Sensing
• Self Priming
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Valeritas' V-Go™
• Patient peels protective liner from the adhesive backing.
• Start button is pushed, micro-needle is inserted and basal insulin starts.
• Can be attached to abdomen, arm or thigh.
• Wearer presses the bolus button and a click will be heard to indicate bolus has been delivered.
• Replaced every 24 hours.
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Pieces and Parts
BLADDER
Insertion Device(optional)
Insulin Pump
+
Reservoir
+
Infusion Set
+
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Infusion Sets
• Angle of insertion (straight vs angled)
• Canula length (5-9 mm)
• Plastic vs. steel
• Tubing length (18”-43”)
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Infusion Sets
SilhouetteSilhouette
Silhoutte Silhoutte ComfortComfort
Medtronic Quick SetMedtronic Quick Set
Rapid-DRapid-D
Straight/AngledStraight/Angled 90 degree90 degree
Polyfin
(steel)
Polyfin
(steel)
Animas Inset
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Infusion Set Inserters
Medtronic Medtronic Quik-serterQuik-serter
Animas Inset
Medtronic Mio
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Location, Location, LocationBy Absorption Rate
Abdomen
Arms
Thighs
Buttocks
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Change It Up
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Wear It Well
Waist Clip Belt Loop Clip Case Velcro Waist Case
Velcro Thigh Wrap Supplies Travel Case Children’s Case
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Patient Selection Criteria
• Is motivated and monitoring
• Wants to improve glucose control
• Desires to live a more normal life
• Currently using an MDI regimen
• Has family support
• Has realistic expectationsTanenberg: The Insulin Pump Book, MiniMed 1995: 21-30
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Transitioning To a Pump• 2 hour initial appointment
• Daily to weekly follow up with CDE in first few weeks
• Control may not improve in first month
• Hold basal insulin day before switching to pump
• Patient will need new prescription for vials if currently using pens
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34
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Variable Wave Boluses
Normal BolusThe whole bolus is delivered at one time
Extended Bolus (Square Wave)The bolus is deliveredover time
Combination Bolus (Dual Wave)A combination of both a normal and a square bolus
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Time
0 5 min … 1 hr. 2 hrs. 3 hrs. 4 hrs.
Time
0 5 min … 1 hr. 2 hrs. 3 hrs. 4 hrs.
Time
0 5 min … 1 hr. 2 hrs. 3 hrs. 4 hrs.
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Smart Pumps
• Offer more precise calculations based on formulas and algorithms that help determine insulin dose based on:1. Carbohydrate intake
2. Current glucose level
3. Insulin on board
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Today’s Smart Pumps
• Easy dose calculations with Carb Factor and Correction Factor
• Precise insulin dosing (0.025 units) to allow basal rates to be set up for Dawn Phenomenon, etc.
• Tracks insulin on board to avoid insulin stacking
• Reminders for missed meal bolus & BG post meal
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Definition: Insulin on Board (IOB)
The amount of insulin still active at a given time after a bolus
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Insulin Remaining vs. Time
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8
Rapid ActingRegular
Time (hrs)
Per
cen
t R
emai
nin
g
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PROTEIN &/OR FAT SENSITIVE?
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Examples 1Meal : 1:15 insulin:CHO ratio
•grilled chicken breast
•10 french fries
•2cups salad with 1/4 cup ranch dressing
•1/4 slice coconut cream pie
Dual wave bolus: 4 units now and 3 units over 1.5 hours
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Example 2
Meal : 1:12 insulin:CHO ratio•House salad with blue cheese dressing
•meat lasagna
•2 garlic rolls
•1/2 slice apple pie a la mode
•initial bolus: 6 units (~ 80 gm cho)
•dual wave of 3 units + 4 units over 2 hours when dessert arrives
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T1DM PEARLS
• Do basal checks especially overnight
• Bolus is correct if 2 hour post-prandial is at target
• Total Daily Insulin Need: ~0.6-0.8 u/kg Total Daily Dose (TDD)
• Basal: ~ 0.3 u/kg (~ 40-50% of TDD)
• Bolus: ~ 50-60% of TDD
• Most need to lead meal bolus by 15-30 minutes
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Diabetes Burnout
Adopt the pace of nature-Her secret is patience
Ralph Waldo Emerson
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Management Software
• Personal –Animas, Deltec, Insulet• Web based – Animas, Medtronic Carelink,
Carelink Pro
• Helpful for review of data:– Insulin use– BG records– CHO records– Alarms– Settings
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Insulin Pump Software Download
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Sensor Augmented Pump
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T1DM & Pregnancy
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Effectiveness of Sensor-Augmented Insulin Pump Therapy in Type 1 Diabetes
Bergenstal RM, Tamborlane WV, Ahmann A, et al. N Engl J Med. doi:10.1056/NEJMoa1002853.
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STAR 3 Summary
Conclusions:• The decrease in A1C levels in the SAP group was
achieved at 3 months and sustained throughout the 1 year study.
• The improvement in A1C levels was achieved without an increase in the rate of severe hypoglycemic events andwithout an increase in the time spent at an AUC <70 mg/dL.
• A significantly greater number of adults and pediatric subjects in the SAP group reached ADA age specific A1C targets.
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STAR 3 Measures of Success
• Subjects with the most favorable changes in 1-year A1C values had
More in-target sensor glucose values
More Bolus Wizard interactions
More sensor use
Lower glycemic variability
Used smaller boluses per kg (0.06 vs. 0.07)
• Total daily insulin dosage, TDD/kg, and bolus-to-basal ratios did not correlate with changes in A1C
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Pump Checklist
• Will need a “back up” regimen
• Pump Holiday
• Travel issues
• Record pump settings
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The Closed Loop 2011(As Good as it Gets )