management of diabetes and hyperglycemia in the hospital
TRANSCRIPT
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Management of Diabetes and Hyperglycemia in the Hospital
Stephen Clement M.D.
Associate Professor
Georgetown University Hospital
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Insulin Rx is important
Hyperglycemia in hospital is common Majority treated with insulin Insulin is one of five “high alert
meds” with greatest risk for causing medication error injuries.
Current Rx practices varied & commonly do not enable targeted glucose control
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Scope of Problem at GU Hospital
Multiple cases of errors in insulin orders/administration causing: DKA (lack of basal insulin) Severe hypoglycemia (insulin stacking, wrong dose)
Emergence of glucose control as a target to improve hospital outcomes (reduced mortality and reduced length of stay)
New AACE/ADA targets
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Post-op Order
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Hyperglycemia*: A Common Comorbidity in Medical-Surgical Patients in a Community Hospital
64%64%
12%12%
26%26%
NormoglycemiaNormoglycemia
Known DiabetesKnown Diabetes
New HyperglycemiaNew Hyperglycemia
Umpierrez G et al, J Clin Endocrinol Metabol 87:978, 2002Umpierrez G et al, J Clin Endocrinol Metabol 87:978, 2002
n = 2,020n = 2,020
* Hyperglycemia: Fasting BG * Hyperglycemia: Fasting BG 126 mg/dl 126 mg/dl or Random BG or Random BG 200 mg/dl X 2 200 mg/dl X 2
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Obstacles to In-Hospital Glucose Control
Infection Severe Stress Illness Procedures NPO Status Fear of Hypoglycemia Lack of Activity Meals
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Hyperglycemia in the Hospital
Nuisance
or Opportunity?
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Hyperglycemia: An Independent Marker of In-Hospital Mortality in Patients with Undiagnosed Diabetes
0
10
20
30
NormoglycemiaNormoglycemia Known Known New New DiabetesDiabetes Hyperglycemia Hyperglycemia
1.7%1.7% 3%3%
16% 16% **
Mort
alit
y (
%)
Mort
alit
y (
%)
* P < 0.01* P < 0.01
Umpierrez G et al, J Clin Endocrinol Metabol 87:978, 2002Umpierrez G et al, J Clin Endocrinol Metabol 87:978, 2002
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Hyperglycemia: An Independent Marker of In-Hospital Mortality in Patients with Undiagnosed Diabetes
0
10
20
30Non ICU MortalityNon ICU Mortality
NormoglycemiaNormoglycemia Known Known New New DiabetesDiabetes Hyperglycemia Hyperglycemia
0.8%0.8% 1.7%1.7%
10.0% 10.0% **
Mort
alit
y (
%)
Mort
alit
y (
%)
* P < 0.01* P < 0.01
Umpierrez G et al, J Clin Endocrinol Metabol 87:978, 2002Umpierrez G et al, J Clin Endocrinol Metabol 87:978, 2002
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Hyperglycemia: Effect on Length of Stay and Disposition at Discharge
NewNew Known NormoglycemiaKnown Normoglycemia HyperglycemiaHyperglycemia DiabetesDiabetes
Length of stay (d)Length of stay (d) 9 ± 0.7 9 ± 0.7a, ba, b 5.5 ± 0.2 5.5 ± 0.2 4.5 ± 0.1 4.5 ± 0.1
ICU admission (%)ICU admission (%) 29 29a, ba, b 14 14aa 9 9
Disposition at dischargeDisposition at discharge
Home (%)Home (%) 56 56a, ba, b 7474aa 84 84
TCU (%) TCU (%) 20 20aa 15 15aa 10 10
Nursing home (%)Nursing home (%) 8 8cc 9 9aa 4 4Results are Results are ±± SEM. TCU, Transitional Care Unit SEM. TCU, Transitional Care Unit
a a P < 0.01 vs. normoglycemia; P < 0.01 vs. normoglycemia; b b P < 0.01 vs. Known diabetesP < 0.01 vs. Known diabetescc P < 0.02 vs. normoglycemiaP < 0.02 vs. normoglycemia
Umpierrez GE et al, J Clin Endocrinol Metabol 87:978, 2002Umpierrez GE et al, J Clin Endocrinol Metabol 87:978, 2002
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In-Hospital Glucose and Acute Renal Graft Rejection
Glycemic control was assessed during the first 100 postoperative hours
Only 3 of 27 patients (11%) with mean BG < 200 mg/dL had rejection episodes
58% with mean BG > 200 mg/dl had rejection episodes
Thomas. Early peri-operative glycaemic control and allograft rejection in patients with diabetes mellitus: a pilot study. Transplantation 2001;72:1321.
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Mean perioperative glucose patients with diabetes undergoing their first cadaveric renal transplantation
200 mg/dl
300 mg/dl
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Post-operative Infection and Blood glucose
11.5
31.3
0
5
10
15
20
25
30
35
Preop POD1 POD2
Percent Developing Infection
≤ 220
> 220
Pomposelli. Early postoperative glucose control predicts nosocomial infection rate in diabetic patients. J Parenteral and Enteral Nutrition; 1998; 22: 77.
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Portland Diabetic Project: Insulin Infusion Reduces DSWI
DSWI = deep sternal wound infection; CII = continuous insulin infusion.
4.0
3.0
2.0
1.0
0.0
DSWI(%)
87 88 89 90 91 92 93 94 95 96 97
Year
Patients with diabetes
Patients withoutdiabetes
Furnary AP, et al. Ann Thorac Surg. 1999;67:352–362
CIICII
(N = 3,554)
SCISCI
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Mortality Post-CABG Patients
Furnary AP, et al. J Thoracic Cardiovasc Surg. 2003;125:1007-1021
0
5
10
15
<150 150–175 175–200 200–225 225–250 >250
Average postoperative glucose (mg/dL)
Mortality
Cardiac-related mortality
Noncardiac-related mortality
0.9%1.3%
2.3%
4.1%
6.0%
14.5%
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Risk Reduction by Meticulous Risk Reduction by Meticulous Blood Glucose Control in an ICUBlood Glucose Control in an ICURisk Reduction by Meticulous Risk Reduction by Meticulous Blood Glucose Control in an ICUBlood Glucose Control in an ICU
Van Den Berghe: NEJM 345: 1359, 2001
103 Vs 153 mg%
0 10 20 30 40 50 60
ICU motality
Sepsis
Dialysis
Blood Transfusion
requiring > 14 d vent support
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Glucose
Insulin
Immune dysfunction
Infection dissemination
Reactive O2 species
Transcription factors
Secondary mediators
(i.e., nFB)
Metabolic stress response
FFA
Ketones
Lactate
Stress hormones and peptides
Cellular injury/apoptosis
Inflammation
Tissue damage
Altered tissue/wound repair
Acidosis
Thrombosis
Infarction/ischemia
Prolonged hospital stay
DisabilityDeath
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Shechter et al, 1999
= 79 mg/dl= 110 mg/dl
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Platelet-Derived Thrombosis
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Diabetes Care 27:553-90, 2004
http//care.diabetesjournals.org
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Society of Hospital Medicine AADE
Endocrine Practice 2004
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Glycemic Targetsfor Hospitalized Patients
Non-ICU: Fasting BG < 110 mg/dl Peak BG < 180 mg/dl
ICU:
< 110 mg/dl
Diabetes Care 27:553-91, 2004 Endocrine Practice 2004
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Basal Insulin Requirement
Amount of exogenous insulin per unit time necessary to maintain blood sugars in between meals and when not eating.
In absence of basal insulin, BG’s increase 45 (mg*dL-1hr-1) after insulin withdrawal in insulin-deficient patients.
Clement et al. Diab Tech Therapeutics 4:459-466, 2002
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Example of Poor Outcome from
Lack of Basal Insulin
BG at midnight: 248 mg/dl, HC03 27, AG 10
BG at 8 AM: 616 mg/dl HCO3 11, AG 24
46 mg*dL-1hr-1
Patient Arrested and Died
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Glucose and Ketone Rise After Insulin Withdrawal
050
100150200250300350400450
0 1 2 3 4
(hours)
Blo
od
Glu
co
se
(m
g/d
l)
Glucose
3-OHButyrate(mmol/l)0
2
1
Husband et al. Diab Res 3:193-98, 1986
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Characteristics ofInsulin Deficient Patient*
Known type 1 DM H/O pancreatectomy or pancreatic
dysfunction H/O wide BG fluctuations H/O Ketoacidosis H/O insulin use > 5 years
*If “Yes,” then Always provide basal insulin
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Nutritional insulin requirement
Amount of insulin necessary to cover intravenous dextrose, TPN, enteral tube feedings, nutritional supplements &/or discrete meals
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Illness or Stress-Related Insulin
The increase in daily insulin requirement attributed to illness, stress, or treatment
Wide individual variation Apportioned between basal,
nutritional & correction doses Need decreases as clinical
condition improves
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Insulin Requirements in Health & Illness
0
20
40
60
80
100
120
140
Correction
Nutritional
Prandial
Basal
Rel
ativ
e p
rop
orti
on o
f in
suli
n r
equ
irem
ent
(%)*
*Estimations for illustrative purposes: requirements mayvary widely.
Adapted from ADA Technical Review: Management of Diabetes & Hyperglycemia in Hospitals.
Diabetes Care 2004. In press.
Sick/Eating
Healthy
Sick/ NPO
Illness-Related
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Correction/supplemental Insulin
Amount of insulin give for unexpected hyperglycemia
a.k.a. “sliding scale”
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Sliding Scale InsulinConcerns
Use as only insulin replacement in insulin-deficient patient
Better terminology, i.e., corrective or supplemental insulin
Lack of standardization
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SLIDING SCALE INSULIN
171 patients, secondary dx DM, medicine SSI without programmed insulin: 22.8% hypoglycemia (<60 mg/dl) 40.4% hyperglycemia (>300 mg/dl)
SSI alone with 3x risk hyperglycemia
BG
BG
Insulin
Queale & Brancati. 1997. Arch. Int. Med. 157: 545-552
(Normal)
Dextrose
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BASALNUTRITIONAL
SUPPLEMENTAL
ILLNESS-RELATED
Terminology:Terminology:Physiologic Insulin Physiologic Insulin
needsneeds
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Case #1 22 y/o Female with Acute Leukemia admitted
for neutropenic fever
No prior h/o “diabetes”, but during prior chemo tx regimens, insulin was required.
Diet: medium consistent carb (75g/meal)
New Chemo Rx includes Predisone, 200 mg q A.M.
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Example: 22 y/o with Acute Lymphoblastic Leukemia with Neutropenic Fever
0
20
40
60
80
100
120
140
1 4 7 12 16 21
Hospital Day
Uni
ts p
er D
ay
Correction
Insulin Drip
Prandial
Basal
Prednisone
Illness/Stress-Related Insulin
0
50
100
150
200
250
300
1 4 7 16 21
Hospital Day
Avg. Blood Glucose (mg/dl)
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Insulin Drip Rate
0
1
2
3
4
5
6
7
8
9
600 800 1000 1200 1400 1600 1800 2000 2200 2400 200 400
Time of Day
Insu
lin
Dri
p R
ate
(un
its/
ho
ur)
Prednisone Dose
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Special Circumstances
Perioperative Management
Enteral NutritionParenteral NutritionGlucocorticoid Use
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Practical Guidelines:Eating
Programmed Supplemental
basal nutritional
int bid or hs rapid ac rapid ac
or B&D or B,L,D
LA hs or am
insulin drip
Comments: Give rapid insulin 0-15 min ac Glargine usually given as once daily dose at hs Avoid reg & rapid at hs to minimize nocturnal hypoglycemia risk
Rx
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Practical Guidelines:Perioperative or peri-procedural
NPO e.g major surgery
Programmed Supplemental/
Basal Nutritional Correction insulin drip n/a or per TPN until resumes po
reg q 4-6 hours enteral guidelines reg q 4-6 hours
rap q 4 hours rap q 4 hours
int, give 1/2 usual
am dose
LA usual daily dose
Comments: If prolonged post-op NPO, insulin drip Rx recommended Periop insulin drip starting dose is 0.2 units/kg/hour
Rx
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Enteral Nutrition
Short acting insulin until tolerating well
Continuous enteral regimen Regular insulin q 4-6 hrs during feeding period +/- Basal insulin
Bolus enteral regimen Regular insulin SQ prior to each bolus +/- Basal insulin
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Practical Guidelines: Total Parenteral Nutrition
Programmed Supplemental/
basal nutritional correction
reg or rap added reg or rap q 4-6 hours
to TPN bag
Comments: Basal & nutritional needs met with reg or rap insulin added to TPN bag Consider use of separate iv insulin infusion for 24 hours to determine daily
insulin requirement, than add this amount to subsequent bags daily Use subcutaneous insulin with caution, as may lead to erratic BG control
Rx
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Initiating Insulin tx Hospitalized Patient
Basal insulin 0.4 units/kg/day (i.e., Glargine)
Prandial &/or nutritional: 0.1 unit/kg/meal (i.e., Novolog or Humalog)
Patients with insulin deficiency always require basal insulin to prevent ketosis
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Transition of IV to Subcutaneous InsulinSome Dos & Don’ts
Do overlap SC and IV insulin to minimize “hyperglycemia escape.”
Don’t switch to oral agents alone from IV insulin.
Arrange for follow up of patients placed on temporary insulin.
Ensure adequate food intake when switching patients with to SC insulin.
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Bedside Glucose Monitoring Strong quality control program essential
Some systems can give falsely elevated readings
Specific situations render capillary tests inaccurate Shock, hypoxia, dehydration Extremes in hematocrit Elevated bilirubin, TG’s Drugs
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Prevention/Tx of Hypoglycemia
Proactive Approach Missed meal, tube feeding D/C’d Schedule procedures in the AM
Establish a nurse-driven protocol for starting dextrose and test hourly glucose testing if hypoglycemia anticipated.
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Education:Core knowledge for physicians
Impact of BG on hospital outcomes Hospital targets for BG Terminology basal/nutritional/correction Insulins Hypoglycemia prevention & treatment Avoid SSI Special circumstances
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Education: Core competency for Nurses
Bedside glucose monitoring technique Critical and target BG values Insulin administration technique Optimum timing of SQ insulin shots Hypoglycemia prevention & treatment BG & insulin dose documentation When to call the MD
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Patient Education:Content areas
What is diabetes? Symptoms & signs of high and low BG Hypoglycemia Rx Medications (specifics of discharge regimen) Self-glucose monitoring (keep a log) When to call the doctor Education resources
Adapted from American Association of Diabetes Educators
Survival Skills Education Guidelines.
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GU Hospital Initiatives2004 - 2006
In-service all M.D.’s and nursing units on proper basal/bolus insulin therapy
Laminated cards
I.V. Drip changes and any SC insulin injection requires second nurse check dose and sign
Implement IV insulin protocol outside of ICU
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GU Hospital Initiatives(cont) 2004 - 2006
Piloted standard order form and MAR for s.q. insulin administration
Eliminated Regular insulin except for enteral feeding and insulin drips
Roll out of revised order form for entire hospital (July ’05.)
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Components of the standardized subcutaneous insulin protocol
BG monitoring frequency Target BG range Programmed insulin orders: Suggested lag times for prandial insulin Correction dose algorithm Call parameters for high & low BG Hypoglycemia Rx guidelines or reference
to hypo protocol
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Insulin-Glucose Flow Sheet
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GU Hospital ResultsInsulin Error Rate
0
5
10
15
20
25
30
35
% Errors
2005 2006
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Future GU Hospital Initiatives
Within 8 hours of admission DM patients will have lab glucose and Bedside BG’s started
Any patient with a lab value > 200 mg/dl will be checked to see if bedside BG orders are written and A1C ordered
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Future Initiatives (cont.)
Patients with two or more bedside or lab BG values > 300 or < 60 receives automatic consult by diabetes NP
Outcomes: Mean BG and range of BG levels for all patients Mortality, LOS
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TEAM APPROACH TO THE TREATMENT TEAM APPROACH TO THE TREATMENT OF THE HOSPITALIZED DIABETIC PATIENTOF THE HOSPITALIZED DIABETIC PATIENT
PhysicianPhysician Nurse EducatorNurse Educator
DietitianDietitian
Endocrinologist Pharmacist
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Blood Glucose
0
50
100
150
200
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Glucose Control Matters
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Collaborators
Penny Smith, CNP Susan Braithwaite, M.D. Michelle Magee, M.D. Andrew Ahmann, M.D. Rebecca Schaffer, R.D. Irl Hirsch, M.D. American Diabetes Assoc. AACE