Diabetes Update 2017 · Diabetes Update—2017 Timothy C. Evans, MD PhD FACP Department of Medicine...
Transcript of Diabetes Update 2017 · Diabetes Update—2017 Timothy C. Evans, MD PhD FACP Department of Medicine...
Diabetes Update—2017
Timothy C. Evans, MD PhD FACP
Department of Medicine
and MEDEX Northwest
University of Washington
NCCPA Disclaimer
• I am on the Board of Directors (BOD) of NCCPA.
• The BOD is involved with strategic direction and policy.
• The BOD does not develop or review the exams.
• I have never taken nor seen the PANCE, PANRE, or
individual test items.
• In this lecture I am not speaking on behalf of the
NCCPA, nor with any knowledge of specific exam test
items.
Topics
• Diagnosis/Standards of Care
• Diabetic Foot Evaluation
• Rx including New Drugs
• A Word About Thiazolidinediones
• What Should the Glucose Goal Be?
• Metabolic Syndrome and DM prevention
• What’s Next?
Types of Diabetes
• Type 1—Autoimmune, insulin deficient, DKA
prone
• Type 2—Familial, insulin resistance and
abnormal insulin secretion
• Gestational
• Other—Drug induced, endocrinopathies,
genetic
Diagnostic Criteria
• FPG ≥ 126 mg/dL
• Random PG ≥ 200 mg/dL in a patient with Sx of
hyperglycemia
• 2-hr PPG ≥ 200 mg/dL during OGTT
• ADA Rec: Screen high risk pts q 3 yrs
• HbA1c (2010, became an official diagnostic criterion)
– Prediabetes, 5.7–6.4%
– Diabetes, 6.5% or greater
Who to Screen
• BMI > 25 kg/m2 (> 23 kg/m2 Asian Amer) and:
– Phys inact; +1st deg rel with DM; Hx GDM; HBP;
HDL < 35 mg/dL and/or TG > 250 mg/dL; women
with PCOS; HbA1c > 5.7%, IGT, IFG; cond assoc
with ins resist (severe obesity, acanthosis nigricans);
Hx CVD.
– Start at age 45 yrs
– Repeat q3yrs, more freq for pre-DM or other risks
Standards of Care
• Diabetes Care (journal) Supplement, each
January
• Accessible at www.diabetes.org
• SoC 2016, Abridged for Primary Care
Providers at:
• http://clinical.diabetesjournals.org/site/misc/
2016Abridged-SOC.pdf
Normal Goal
Additional
Action
Suggested
Whole blood values
Average preprandial glucose (mg/dl) <100 80–130 <80 or >140
Average bedtime glucose (mg/dl) <110 100–140 <100 or >160
Plasma values
Average preprandial glucose (mg/dl) <110 90–130 <90 or >150
Average bedtime glucose (mg/dl) <120 110–150 <110 or >180
HbA1c (%) <6 <7 >8
Standards of Care Glycemic Control
Standards of Care Weight and Diet
• Diet: 50+% calories from carbohydrate,
< 30% calories from fat (mostly
monounsaturated, < 7% sat, < 200 mg chol, min
trans FA), 15-20% from protein (0.8 g/kg)
• Weight control for overwt or obese: 500–1000
kcal/d deficit. Inc insulin sensitivity in type 2.
• Bariatric surgery consider in BMI > 35kg/m2
Standards of Care Exercise
• Attention to micro and macrovascular dis
• Gradual increase
• ETT if ≥ 10% 10-yr cardiac event risk
• 150+ min/wk mod ex (50–70 % max ht rt)
• Or 90+ min/wk vigorous aerobic ex (> 70% max ht rt)
• Spread over at least 3 d/wk, no more than 2 consecutive days of inactivity
Prevention of Complications Hypertension
• Goal < 140/90 (lower?, JNC 8)
• Regimen should include ACEI or ARB,
esp if also nephropathy
• Add CCB, thiazide, others
• Lifestyle—smoking cessation, diet
(DASH, mod EtOH, sodium < 2.4 g/d),
physical activity (mod-vig 3-4 days/wk,
40 min/session)
Prevention of Complications Dyslipidemia—ATP 4
• Four statin benefit groups
– Clinical ASCVD
– LDL > 190 mg/dL
– DM, 40-75 yrs, LDL 70-189 mg/dL
– 40-75 yrs, LDL 70-189 mg/dL, 10-yr risk 7.5%
or higher, no DM or ASCVD
New Risk Calculator
• 10-yr risk for ages 40-75 years
• Similar risk factors to Framingham
– Sex, age, race, total cholesterol, HDL-
cholesterol, systolic BP, Rx for HBP, diabetes,
smoking
• Diabetes not an automatic ASCVD risk
equivalent
• http://clincalc.com/Cardiology/ASCVD/Poo
ledCohort.aspx
Statin Intensity
• High—lowers LDL by > 50%
– atorv 40-80 mg, rosuv 20-40 mg
• Moderate—lowers LDL by 30 to < 50%
– atorv 10-20, rosuv 5-10, simva 20-40, similar
moderate doses for the other statins
• Low—lowers LDL by < 30%
– simva 10 mg, similar low doses other statins,
no atorv or rosuv
ASCVD Risk
• 50 y/o, Tchol 250 mg/dL, HDL 38 mg/dL,
SysBP 145 mmHg, HTN Rx yes, smoker no
• DM no, 10-yr ASCVD risk 9.1%
• DM yes, 10-yr ASCVD risk 16.8%
ASCVD Risk
• 50 y/o, Tchol 200 mg/dL, HDL 38 mg/dL,
SysBP 145 mmHg, HTN Rx yes, smoker no
• DM no, 10-yr ASCVD risk 6.7%
• DM yes, 10-yr ASCVD risk 12.5%
ASCVD Risk
• 50 y/o, Tchol 200 mg/dL, HDL 40 mg/dL,
SysBP 125 mmHg, HTN Rx no, smoker no
• DM no, 10-yr ASCVD risk 4.2%
• DM yes, 10-yr ASCVD risk 7.9%
Prevention of Complications Smoking Cessation & ASA Use
• Smoking—quit all tobacco products
• 1/4–1/2 ASA for 2º CVD prevention
• Use for 1º prevention in:
– > 50 y/o with other RF (+ FH, HBP, smoking,
dyslipidemia, albuminuria), or
– Pts with 10-yr CHD risk ≥ 10%
Prevention of Complications Retinopathy
• Dilated exam by specialist
– Type 1 within 3-5 yrs of Dx
– Type 2 at Dx
– Before, during, and after pregnancy for
preexisting DM
Mohamed, Q. et al. JAMA 2007;298:902-916.
Nonproliferative and Proliferative Diabetic Retinopathy
A: Moderate nonproliferative diabetic
retinopathy with microaneurysms,
retinal hemorrhages, and macular
edema characterized by increased
vascular permeability and deposition
of hard exudates at the central retina.
B: Proliferative diabetic
retinopathy with new vessels and
fibrous tractional bands arising
from the optic disc.
Prevention of Complications Nephropathy
• Annual microalbuminuria and eGFR
– Type 1 after 5 years
– Type 2 at Dx
• Rx micro or macroalbuminuria
– ACEI or ARB
– Dietary protein, 0.8 mg/kg (~ 10% daily cal)
• Control BP also with ACEI, ARB, diuretics, CCB
Prevention of Complications Neuropathy
• At Dx in type 2, after 5 yrs in type 1
• Foot exam
• Autonomic screening—hypoglycemic
unawareness, resting tachycardia, exercise
intolerance, orthostatic hypotension,
constipation, gastroparesis, erectile dysfunct
• Pain can be treated with pregabalin,
duloxetine, and tapentadol. For more severe:
amitriptyline, venlafaxine, gabapentin, opioids.
Prevention of Complications Foot Care
• Exam — 10-gram monofilament;
vascularization; vibration; proprioception;
palpation; visual exam for callus, skin
atrophy or ulceration, infection, nail care,
hair distribution, deformity
• Pt education, glycemic control, D/C
smoking, orthotics
Likelihood of Osteomyelitis
• Visible bone or ability to probe to bone
• Ulcer > 2 x 2 cm
• Ulcer duration > 1–2 wks
• ESR > 70 mm/hr
The Primary Cause of Amputations
• Shoes and socks at clinic visits
• The time to take them off
• You can save limbs if you look at feet.
• Efficiency—Get the shoes and socks off before
you come into the room
– Train your patients
– Instruct the office staff
Treatment—Insulin
• Type 1 DM—Multiple daily injections of
insulin, basal and prandial, with
individualization, multiple SMBG
• Type 2 DM—for very high blood sugars, as
augmentation for oral agents, basal or
multiple duration insulin. Individualize.
Insulin should be used more often than it is.
Insulin
Preparations
Onset of Action Peak Action Duration of
Action
Lispro/Aspart 5–15 minutes 1–2 hours 4–6 hours
Human Regular 30–60 minutes 2–4 hours 6–10 hours
Human NPH 1–2 hours 4–8 hours 10–20 hours
Glargine/Detemir 1–2 hours Flat ~24 hours
Insulin preparations
Treatment—Drugs
Oral Agents (type 2 DM):
• Insulin secretagogues
– Sulfonylureas
– Meglitinides
• Insulin sensitizers
– Metformin
– Thiazolidinediones
• Polysaccharide digestion inhibitors—alpha-glucosidase inhibitors
• Dipeptidyl peptidase IV (DPP-IV) inhibitors
• Sodium-glucose transporter 2 (SGLT 2) inhib
Expected HbA1c Decrease
• TLC 1-2%
• Metformin 1-2% (slow)
• Sulfonylureas 1-2% (fast)
• Insulins 1.5-3.5% (fastest)
• TZDs 0.5-1.4% (slowest)
• GLP-1 agonists 0.5-0.8%
• α-glucosidase inhibs 0.5-0.8%
• DPP-IV inhibs 0.5-0.8%
• SLGT-2 inhibs 1%
The Incretin Effect
• More rapid disposal of glucose load when
given by mouth than IV
• Greater insulin effect
• Glucagon inhibition
• Delayed gastric emptying
• Due to GI signaling and release of GI
hormones
GI Hormones
and an Enzyme Inhibitor
• Glucagon-like peptide 1 (GLP-1),
injectable, nausea
– exenatide, ER-exenatide, liraglutide
• Amylin (↓ gastric emptying, ↑ satiety),
injectable, nausea
– pramlintide
• Dipeptidyl peptidase IV (DPP-IV, rapidly
degrades GLP-1 and GIP) inhibitors, oral
– sitagliptin, saxagliptin, linagliptin, alogliptin
Na-Glucose Transporter Inhibitors
• SGLT-2 in proximal renal tubule
• Canagliflozin
• Accounts for 90% glucose reabsorption
• Decrease HbA1c by ~1%, BW and SBP
• Yeast vaginitis, UTI, polyuria, occas
hypoglycemia
• Contraindications—type 1 DM, severe renal
insufficiency
Thiazolidinediones
• Cardiac Effects
• Bones
Pioglitazone
• Pioglitazone meta-analysis
– 19 trials; 16,390 patients
– Decreased death, MI, CVA; HR 0.82 (0.72–0.94)
– Increased CHF; HR 1.41 (1.14–1.76)
– No change CHF mortality
• Prescribing information includes black box warning about CHF
JAMA. 2007;298:1180-88.
Rosiglitazone
• Rosiglitazone meta-analysis
– 4 RCTs; 14,391 patients
– Increased MI; HR 1.42 (1.06-1.91)
– CHF; HR 2.09 (1.52-2.88)
– No change cardiac mortality; HR 0.90 (0.63-1.26)
• Prescribing information includes black box warning about CHF and myocardial ischemia
JAMA. 2007;298:1189-95.
More Rosiglitazone
• Meta-analysis
– 42 trials
– Mean age 56 years
– Baseline HbA1c 8.2%
• MI odds ratio 1.43 (95% CI, 1.03-1.98,
P=0.03)
• CV death odds ratio 1.64 (95% CI, 0.98-
2.74, P=0.06) NEJM. 2007;356:2457-2471.
Rosiglitazone vs Pioglitazone
• 227,571 Medicare patients, mean age 74.4 yrs
– Rosiglitazone or Pioglitazone for 3 years
• Acute MI, CVA, CHF, all-cause mortality,
composite of all
• 8667 endpoints, Rosi > Pio for CVA, CHF, death
• Composite risk 1.68 (95% CI, 1.27-2.08)
• NNH 60 Rx’d for 1 year
JAMA. 2010;304:411-418.
JAMA. 2010;304:469-471.
Thiazolidinediones and Bones
• Risk of peripheral fractures
• Both pioglitazone and rosiglitazone
• FDA warnings in prescribing information
JAMA. 2007;297:1645.
Drug Saf. 2009;32:539-547.
Thiazolidinediones
For Now
• Avoid in NYHA Class III and IV CHF
• Use with caution in Class I and II
• Prudent to avoid rosiglitazone in patients at significant risk of ischemic ht disease and instead consider metformin, SUs, or insulin
• Consider fracture risk
How Low Should the Glucose Be?
• DCCT, UKPDS, and long-term benefits
• Steno-2 and long-term followup
• ACCORD—NEJM. 2008;358:2545-2559.
• ADVANCE—NEJM. 2008;358:2560-2572.
• VADT—NEJM. 2009;360:129-139.
DCCT—Type 1 DM
NEJM. 1993;329:977–986.
Epidemiology of Diabetes Interventions
and Complications (EDIC)
NEJM. 2005;353:2643–2653.
UKPDS—Type 2 DM
UKPDS 10 Years Later
• HbA1c differences gone after 1 year
• RR decrease in SU/insulin aggressive Rx
– 9% any DM endpoint
– 24% microvascular disease
– 15% MI
– 13% any cause death
• RR decrease in metformin aggressive Rx
– 21% any DM endpoint
– 33% MI
– 27% any cause death
NEJM. 2008;359:1577-1589.
Steno-2 Study and Follow-Up
ACCORD
ADVANCE • 11,140 pts, RCT, HbA1c goal < 6.5%
• At 5 years—intensive 6.5%, std 7.3%
• Results
– Micro/macrovasc; HR 0.90 (0.82–0.98), 1º renal
– Major microvasc; HR 0.86 (0.77–0.97)
• 1º renal (HR 0.79; 0.66–0.93), no effect retinopathy
• No effect on major macrovasc, CV death, or any
cause death
• Gliclazide 90.5% vs 1.6%, TZD 16.8% vs 10.9%
• Insulin 40.5% vs 24.1%
Veterans Affairs Diabetes Trial
Glucose Control in the ICU
• Early studies showed benefit of tight control.
• More recent multicenter studies, in both
medical and surgical ICUs, show risk.
• Ideal is probably a compromise between risk of
out-of-control DM and hypoglycemia.
• 2016 SoC: 140-180 mg/dL in most critically ill
patients. Insulin is preferred treatment.
Recommendations for Now
• HbA1c 7% remains standard of care
– Probably more to be gained from getting uncontrolled pts down to 7% than from lowering tightly controlled pts further
• Attention to healthy lifestyle
– Diet, exercise, weight control
• Aggressive BP control
• Aggressive dyslipidemia control
• Discontinue tobacco
Metabolic Syndrome—NCEP (revised 2005, Circulation. 2005;112:2735-2752)
• Any three of five of the following
– Glucose intolerance/insulin resistance: FBS ≥ 110 mg/dL (≥ 100 mg/dL, or on drug Rx)
– Hypertension: BP ≥ 130/85 (or on drug Rx)
– Dyslipidemia
• TG ≥ 150 mg/dL (or on drug Rx)
• HDL < 40 mg/dL in men, < 50 mg/dL in women (or on drug Rx)
– Central adiposity: waist circ > 40” men, > 35” in women
Metabolic Syndrome Prevalence
Third NHANES, 1988-1994
Arch Int Med. 2003:427-436.
Metabolic Syndrome and
Cardiovascular Mortality JAMA. 2002;288:2709-2716.
Metabolic Syndrome and
Cardiovascular Mortality JAMA. 2002;288:2709-2716.
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Cardiovascular Mortality JAMA. 2002;288:2709-2716.
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Finnish Diabetes Prevention Study
• Design
– 522 middle-aged overweight (BMI 31)
– 172 men and 350 women
– Mean duration 3.2 years
• Intervention Group: Individualized counseling
– Reducing weight, total intake of fat and saturated fat
– Increasing intake of fiber, physical activity
Tuomilehto J et al. N Engl J Med 2001;344:1343-1350.
Treating the Metabolic Syndrome
Goals
Intervention Controls
P value % of subjects
Wt reduction >5% 43 13 0.001
Fat intake < 30%
energy 47 26 0.001
Sat fat
<10% energy 26 11 0.001
Fiber
>15 g/1000 kcal 25 12 0.001
Exercise > 4
hr/wk 86 71 0.001
Tuomilehto J et al. N Engl J Med 2001;344:1343-1350..
Incidence of Diabetes during Follow-up
No. with Diabetes/Total no.
Intervention 5/13 10/66 9/69 2/38 0/25 0/24
Control 15/48 25/107 14/48 2/15 0/11 0/4
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Diabetes Prevention Program
NEJM. 2002;346:393–403.
ADA Recommendations
• For patients with IGT or IFG
• Lifestyle intervention is primary
– Modest wt loss 5–10%
– Moderate exercise, 30 min daily
– Smoking cessation
• For patients with both IGT and IFG consider
adding metformin
– Consider OGTT in pts with IFG less than 60 y/o
and with BMI > 35
Metabolic Syndrome
Summary
What’s Next?
• Non-invasive glucose monitoring
• Type 1 — Islet and stem cell transplantation
• Type 2
– Rx the epidemic of obesity
– Increased understanding of weight homeostasis
• Mechanism of insulin resistance and the
connection with visceral adiposity
• Genetics of diabetes