diabetesmelitus-181122211135.pptx just study

Diabetes
Management
Dr. Sameh Ahmad Muhamad abdelghany
Lecturer Of Clinical Pharmacology
Mansura Faculty of medicine

2
Diabetes
Mellitus
INTRODUCTION





Classification
RISK FACTORS
Diagnosis
Treatment
CONTENTS

4
INTRODUCTION
 Definition:
 chronic metabolic disorder of multiple
etiology in which the body can’t
metabolize carbohydrate, fats and
proteins
 because of defects in insulin secretion
and/or action.

5
INTRODUCTION
 As of 2015, an estimated 415 million
people had diabetes worldwide, with
type 2 DM making up about 90% of
the cases.
 Diabetes at least doubles a person's risk
of early death.
 From 2012 to 2015, approximately 1.5
to 5.0 million deaths each year resulted
from diabetes.

7
Classification of DM
I. Type 1 DM
 It is due to insulin deficiency and is formerly known
as:
o Type I
o Insulin Dependent DM (IDDM)
o Juvenile onset DM
II. Type 2 DM
 It is a combined insulin resistance and relative
deficiency in insulin secretion and is frequently
known as:
o Type II
o Noninsulin Dependent DM (NIDDM)
o Adult onset DM

8
Classification of DM
III. Gestational Diabetes Mellitus (GDM):
 Gestational Diabetes Mellitus (GDM) developing
during some cases of pregnancy but usually
disappears after pregnancy.
IV. Secondary DM:
 Results from another medical condition or due to the
treatment of a medical condition that causes
abnormal blood glucose levels
o Cushing syndrome (e.g. steroid administration)
o Hyperthyroidism

9
Etiology
Etiology of Type 1 Diabetes:
 Autoimmune disease
 Selective destruction of cells by T cells
 Several circulating antibodies against
cells
 Cause of autoimmune attack: unknown
 Both genetic & environmental factors are
important

10
Etiology
Etiology of Type 2 Diabetes:
 Response to insulin is decreased
o glucose uptake (muscle, fat)
o glucose production (liver)
 The mechanism of insulin resistance is
unclear
 Both genetic & environmental factors are
involved
 Post insulin receptor defects

11
Epidemiology
Type 1 DM:
 It is due to pancreatic islet β-cell
destruction predominantly by an
autoimmune process.
 Usually develops in childhood or early
adulthood
 accounts for upto 10% of all DM cases
 Develops as a result of the exposure of a
genetically susceptible individual to an
environmental agent

12
Epidemiology
Type 2 DM:
 It results from insulin resistance with a
defect in compensatory insulin secretion.
 Insulin may be low, normal or high!
 About 30% of the Type 2 DM patients are
undiagnosed (they do not know that they
have the disease) because symptoms are
mild.
 accounts for up to 90% of all DM cases

14
Risk Factors
 For Type 1 DM
 Genetic predisposition
 In an individual with a genetic
predisposition, an event such as virus or
toxin triggers autoimmune destruction of
β-cells probably over a period of several
years.

15
Risk Factors
 For Type 2 DM
 Family History
 Obesity
 Habitual physical inactivity
 Previously identified impaired glucose
tolerance (IGT) or impaired fasting
glucose (IFG)
 Hypertension
 Hyperlipidemia

17
Clinical manifestations
 Type 1 DM:
 Polyuria
 Polydipsia
 Polyphagia
 Weight loss
 Weakness
 Dry skin
 Ketoacidosis

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Clinical manifestations
 Type 2 DM:
 Patients can be asymptomatic
 Polyuria
 Polydipsia
 Polyphagia
 Fatigue
 Weight loss
 Most patients are discovered while
performing urine glucose screening

20
Complications
 Acute Complications
 Hypoglycemia
 Diabetic ketoacidosis
 Hyperosmolar hyperglycemic
nonketotic syndrome

21
Complications
 Chronic Complications
 Macrovascular complications:
 Coronary heart disease, stroke and
peripheral vascular disease
 Microvascular Complications:
 Retinopathy, nephropathy and
neuropathy

23
Laboratory examination
 Fasting blood glucose(FBG)
 Glucose blood concentration in samples
obtained after at least 8 hours of the last
meal
 Random Blood glucose
 Glucose blood concentration in samples
obtained at any time regardless the time
of the last meal

24
 Glucose tolerance test(OGTT)
 75 gm of glucose are given to the patient
with 300 ml of water after an overnight
fast
 Blood samples are drawn 1, 2, and 3
hours after taking the glucose
 This is a more accurate test for glucose
utilization if the fasting glucose is
borderline

25
 Glycosylated hemoglobin (HbA1C)
 Normally it comprises 4-6% of the total
hemoglobin.
 Increase in the glucose blood
concentration increases the glycated
hemoglobin fraction.
 HbA1C reflects the glycemic state during
the preceding 8-12 weeks

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 Glucosuria
 To detect glucose in urine by a paper
strip
 Semi-quantitative
 Normal kidney threshold for glucose is
essential
 Ketonuria
 To detect ketonbodies in urine by a paper
strip
 Semi-quantitative

27
Diagnostic criteria
HbA1C FBG
(mg/dl)
OGTT
(mg/dl)
Diabetes ≥6.5 ≥126 ≥200
Prediabetes 5.6-6.4 100-125 140-199
Normal <5.6 ≤99 ≤139

29
DM - management
 Goals of therapy:
 Reduce symptoms
 Promote well-being
 Prevent acute complications
 Delay onset and progression of
long-term complications

30
DM - management
 Lines of therapy:
 Non-pharmacological treatment
 Pharmacological treatment

31
Non-pharmacological
treatment
 Nutritional therapy:
o Diet
o Exercise
 Stop smoking
 Avoid precipitating factors

32
Nutritional Therapy
 Overall goal of nutritional therapy
o Assist people to make changes in
nutrition and exercise habits that will
lead to improved metabolic control

33
Nutritional Therapy
 Type 1 DM
o Diet based on usual food intake,
balanced with insulin and exercise
patterns
o In most cases, high carbohydrate, low
fat, and low cholesterol diet taken
 Type 2 DM
o Calorie reduction

34
Nutritional Therapy
 Food composition
 Meal plan developed with dietitian
 Nutritionally balanced
 Does not prohibit the consumption of
any one type of food

35
Nutritional Therapy
 Exercise
 Essential part of diabetes management
o Increases insulin sensitivity
o Lowers blood glucose levels
o Decreases insulin resistance
 Take small carbohydrate snacks during
exercise to prevent hypoglycemia
 Exercise after meals
 Monitor blood glucose levels before,
during, and after exercise

36
Pharmacological treatment
 Insulin (Type 1 and Type 2 DM)
 Sulfonylurea (Type 2 DM)
 Biguanides (Type 2 DM)
 Meglitinides (Type 2 DM)
 Thiazolidinediones Glitazones (Type 2 DM)
 α-Glucosidase inhibitors (Type 2 DM)
 Incretin mimetic (Type 2 DM)
 DPP4 inhibitors (Type 2 DM)
 Amylin analogs(Type 1 and Type 2 DM)
 SGLT2 Inhibitors(Type 2 DM)

37
Drug Therapy: Insulin
 Exogenous insulin:
 Required for all patient with type 1 DM
 Prescribed for the patient with type 2
DM who cannot control blood glucose
by other means

38
 Source of insulin
 Human insulin
o Most widely used type of insulin
o Cost-effective & less allergic reaction
 Insulins differ in regard to onset, peak
action, and duration
 Different types of insulin may be used
for combination therapy

39
 Types of insulin
 Regular insulins
 Insulin analogs
 Pre-mixed insulin

40
 According to onset:
o Rapid-acting insulin e.g. Insulin lispro and
insulin aspart
o Short-acting insulin e.g. Regular insulin
o Intermediate-acting insulin e.g. NPH and Lente
insulin
o Long-acting insulin e.g. Insulin Glargine
o Mixture of insulin can provide glycemic control
over extended period of time e.g. Humalin
70/30 (NPH + regular)

41
 Methods of Insulin Administration
 Cannot be taken orally
 Insulin delivery methods
o Ordinary SQ injection with syringes
o Insulin pen
o Insulin pump

43
 Administration of insulin
 Fastest absorption from abdomen,
followed by arm, thigh, buttock
 Rotate injections within one particular
site
 Do not inject in site to be exercised

45
 Problems with insulin therapy
 Hypoglycemia :
o Due to too much insulin in relation to
glucose availability
 Allergic reactions
 Local inflammatory reaction
 Lipodystrophy
o Hypertrophy or atrophy of SQ tissue due
to frequent use of same injection site.

46
 Drugs interfering with glucose tolerance
 Diazoxide
 Thiazide diuretics
 Corticosteroids
 Oral contraceptives
 Streptazocine
 Phenytoin
o All these drugs increase the blood glucose
concentration.

47
Drug Therapy: Oral Agents
 Increase insulin production by pancreas
 Reduce glucose production by liver
 Enhance insulin sensitivity and glucose
transport into cell
 Slow absorption of carbohydrate in
intestine

48
Sulfonylureas
 Stimulate the pancreatic secretion of
insulin
 Classifications:
 First generation
 e.g. tolbutamide, chlorpropamide, and
acetohexamide
 Second generation
 e.g. glimepiride, glipizide, and glyburide

49
Sulfonylureas
 Side effects
 Hypoglycemia
 Hyponatremia (with tolbutamide and
chlorpropamide)
 Weight gain

50
Meglitinides
 E.g Repaglinide ,Nateglinide
 Stimulate the pancreatic secretion of
insulin
 Should be given before meal or with the
first bite of each meal.
 Should not be taken if meal skipped
 Lower incidence of hypoglycemia
(0.3%)

51
Biguanides
 E.g Metformin
 Act by
o Reduces hepatic glucose production
o Increases peripheral glucose utilization
 Does not promote weight gain
 Side effects
 Nausea, vomiting, diarrhea, and
anorexia
 lactic acidosis (rare)

52
Glitazones (PPARγ - Agonists)
 E.g Rosiglitazone - Pioglitazone
 Act by stimulation of peroxisome
proliferator-activated receptor γ
o Reduces insulin resistance in the
periphery and possibly in the liver
 Most effective in those with insulin
resistance
 Edema and weight gain are the most
common side effects.

53
α-Glucosidase Inhibitors
 E.g Acarbose - Miglitol
 Act by
o Slow down absorption of carbohydrate
in small intestine
o Prevent the breakdown of sucrose and
complex carbohydrates
o Th net result reduction of postprandial
blood glucose rise

54
Amylin analog
 Indicated for type 1 and type 2 diabetics
 Administered subcutaneously (Thigh or
abdomen)
 Slows gastric empyting, reduces
postprandial glucagon secretion,
increases satiety
 Example :Pramlintide (Symlin)

55
Incretin mimetic
 Synthetic peptide
 Given by subcutaneous injection
 Activates GLP-1 receptor
 This results in :
o Stimulates release of insulin from β cells
o Suppresses glucagon secretion
o Reduces food intake
o Slows gastric emptying
 Not to be used with insulin
 Example : Exenatide - liraglutide

56
DPP4-Inhibitors
 Inhibits DPP-4
 This results in increase of GLP-1 action
leading to improved pancreatic islet
glucose sensing, increase glucose uptake
 Example : Sitagliptin - Linagliptin

57
SGLT-2 Inhibitors
 SGLT-2 :Sodium Dependent Glucose
Transporters – 2
 Inhibit glucose reabsorption in renal
proximal tubule
 Resultant glucosuria leads to a decline in
plasma glucose & reversal of glucotoxicity
 This therapy is simple & nonspecific
 Even patients with refractory type 2
diabetes are likely to respond

58
Pharmacotherapy :Type 2 DM
 General considerations:
 Consider therapeutic life style changes
(TLC) for all patients with Type 2 DM
 Initiation of therapy may depend on the
level of HbA1C
o HbA1C < 7% may benefit from TLC
o HbA1C 8-9% may require one oral agent
o HbA1C > 9-10% my require more than
one oral agent

59
 Obese Patients :
 Metformin or glitazone then if inadequate
 Add SU or short-acting insulin
secretagogue then if inadequate
 Add Insulin or glitazone

60
 Non-Obese Patients :
secretagogue then if inadequate
 Add Metformin or glitazone then if
inadequate
 Add Insulin

61
 Early insulin resistance :
 Metformin or glitazone then if inadequate
 Add glitazone or metformin then if
inadequate
secretagogue or insulin

62
 The choice of therapy is simple
o All patients need Insulin
 The goal is:
o To balance the caloric intake with the
glucose lowering processes (insulin and
exercise), and allowing the patient to live
as normal a life as possible

63
 The insulin regimen has to mimic the
physiological secretion of insulin
 With the availability of the SMBG and
HbA1C tests adequacy of the insulin
regimen can be assessed
 More intense insulin regimen require more
intense monitoring

64
 Example:
1) Morning dose (before breakfast):
Regular + NPH or Lente
2) Before evening meal:
Regular + NPH or Lente
 Require strict adherence to the timing of
meal and injections

65
 Modification
 NPH evening dose can be moved to
bedtime
 Three injections of regular or rapid acting
insulin before each meal + long acting
insulin at bedtime (4 injections)
 The choice of the regimen will depend on
the patient

66
 How much insulin ?
 A good starting dose is 0.6 U/kg/day
 The total dose should be divided to:
o 45% for basal insulin
o 55% for prandial insulin

67
 Self-monitoring of blood glucose(SMBG)
 Extremely useful for outpatient monitoring
specially for patients who need tight control
for their glycemic state.
 A portable battery operated device that
measures the color intensity produced from
adding a drop of blood to a glucose oxidase
paper strip.
 e.g. One Touch, Accu-Chek, DEX, Prestige
and Precision.

69
 Insulin Pump Therapy
 This involves continuous SC administration
of short-acting insulin using a small pump
 The pump can be programmed to deliver
basal insulin and spikes of insulin at the time
of the meals
 Requires intense SMBG
 Requires highly motivated patients because
failure to deliver insulin will have serious
consequences

71
Acute Complication:
Hypoglycemia
 Hypoglycemia occurs due to too much
insulin (or oral agents) in relation to glucose
availability
 Brain requires constant glucose supply thus
hypoglycemia affects mental function

72
Acute Complication:
Hypoglycemia
 Clinical manifestations:
o Confusion, irritability
o anxiety, tachycardia, tremors
o Diaphoresis, tremor, hunger, weakness,
visual disturbances
o If untreated → loss of consciousness,
seizures, coma, death

73
Acute Complication:
Hypoglycemia
 Treatment for hypoglycemia
 Ingest simple CHO (fruit juice, soft drink), or
commercial gel or tablet
 Avoid sweets with fat (slows sugar absorption)
 Then eat usual meal snack or meal and
recheck
 if not alert enough to swallow
o Glucagon 1m IM or SQ (glycogen → glucose)
o Then complex CHO when alert

74
Acute Complication:
Diabetic Ketoacidosis (DKA)
 Usually in Type 1 diabetes; can occur in
Type 2
 Causes:
o Infection
o Stressors (physiological, psychological)
o Stopping insulin
o Undiagnosed diabetes

75
Acute Complication:
 Clinical manifestations:
o Dehydration
o Deep difficult breathing (d/t metabolic
acidosis)
o Fruity breath (d/t acetone)
o Abdominal pain, N & V, cardiac
dysrhythmias

76
Acute Complication:
 Treatment
 Replace fluid and electrolytes
 Insulin (First IV bolus, then infusion)
 correct precipitating cause (e.g., infection,
etc.)

77
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