Med Surg - Exam3- Mandy- ch49 lecture Flashcards
KNOW EVERYTHING!!!
Islets of Langerhans
hormone secreting portion of pancreas
alpha & beta cells
alpha cells
Alpha cells: produce Glucagon in response to low blood glucose levels
beta cells
Beta cells: produce Insulin in response to high blood glucose-
insulin facilitates
glucose metabolism, glucose transport across cell membranes, and synthesis and storage of glucose, fats, and proteins
Glucagon
Glukegone hormone to increase blood sugar level. When low sugar, protein ingestion, and exercise
Glycogen
storage of glucose in liver
Insulin function
transport glucose into cell and incorporate into protein in muscle, glycogen in liver, and fat trigliceride to adipose tissue.
Fat(/adipose /’edapous/ tissue), glycogen, and protein are the three format of energy storage in human body.
counter regulatory hormones to insulin
: glucagon, epinephrine, growth hormone, and cortisol…raise blood glucose levels
counter regulatory hormones (of insulin)
- Respond to a decline in blood glucose level during fasting or overnight
- Stimulate lipolysis, gluconeogenesis, and glycogenolysis processes
Gluconeogenesis
Gluconeogenesis is the process of synthesizing glucose in the body from non-carbohydrate sources such as protein and fat.
Blycogenolysis
Blycogenolysis - is the breakdown of glycogen to glucose.
Lypolysis
Lipolysis: break down of lipid (fatty tissues) to fatty acid and glycerol.
Diabetes Mellitus (DM)
A chronic multisystem disease related to
Abnormal insulin production
Impaired insulin utilization
Or both
abnormal insulin production in
D1 and D2; insulin resistance due to fatigue/B cell defect
Pancreas of DM type 1
Autoimmune destruction of B cells
Autoantibodies present for months/years before clinical symptoms
No production of insulin
Pancreas of DM type 2
Defective B cell insulin secretion
Insulin resistance stimulates insulin secretion
Eventually exhausting B cells
Liver of DM type 2
Excess glucose production.
Inapprpriate regulation of glucose production
Adipose tissue of DM type 2
Decrease in Adiponectin and Increase in Leptin: results in altered glucose and fat metabolism
Muscle tissue of DM type 2
Defective insulin receptors
Insulin resistant
Decreased uptake of glucose results in hyperglycemia
all you really need to know is that DM2 involves…
metabolic problems in muscle, liver (glucose higher), and adipose tissue (high cholesterol)
TYPE 1 DM
Autoimmune disease, peak onset by 20 years old
Insulin dependent
Rapid & Acute
Classic symptoms: Polyuria, Polydipsia, Polyphagia
Others: weight loss, weakness, fatigue
TYPE 2 DM
- Major contributor for heart, renal disease, and stroke
- Associated with metabolic syndrom
- Asymptomatic in the early stage
- May have classic symptoms of type 1
- Nonspecific symptoms are common: fatigue, prolonged wound healing, visual changes
metabolic syndrome characterized by
- Insulin resistance, elevated insulin levels
- ↑ triglycerides & Low-density lipoproteins, ↓High-density lipoproteins
- Hypertension
HDL
removes excess cholesterol from the body
Excessive LDL
LDL builds up on arterial walls and hardens to create plaque, constricting flow and contributing to heart disease.
Triglyceride
storage of fat for energy use
Cholesterol
for construction of cell and hormone
HDL for
transportation
Hyperglycemia causes a diabetic to produce
a high volume of glucose containing urine
other types of DM
prediabetes
gestational
secondary
prediabetes
Blood glucose levels are at borderlines
No symptom but damages may already occurred
Healthy eating, healthy weight, regular exercise, and monitoring blood glucose and symptoms can reduce the risk of DM
Impaired fasting glucose (IFG)
between 100 -125 mg/dl
to diagnose diabetes, fasting glucose needs
tested twice at more than 126 mg/dl
Impaired glucose tolerance (IGT)
2 hour oral glucose tolerance test (OGTT) level between
140 -199mg/dl
Diagnostics for DIABETES
- HbA1C ≥ 6.5%
- FG level ≥126 mg/dl
- OGTT: Two-hour plasma glucose level ≥ 200 mg/dl
- Random plasma glucose ≥ 200 mg/dl plus symptoms
normal HBA1c
glycosylated hemoglobin. 4-6%
prediabetes HbA1C
5.7-6.4%
Oral contraceptives
could elevate OGTT
prediabetes FG
100-125 mg/dl
prediabetes OGTT
140-199 mg/dl
collaborative care of diabetes
medication
Nutritional therapy
Self-monitoring blood glucose
Exercise
Insulin Bolus
given before meals
Rapid acting or short acting
Rapid Acting Insulin
Lispro (Humalog), aspart (NovoLog), glulisine (Apidra) Injected 0 to 15 minutes before meal Onset of action 15 minutes
Short Acting Insulin
ie REGULAR insulin
Regular (Humulin R, Novolin R)
Injected 30 to 45 minutes before meal
Onset of action 30 to 60 minutes
BASAL Insulin
Basal – control glucose level between meals and overnights
Intermediate or long acting
Basal insulins
Basal – control glucose level between meals and overnights
Intermediate-acting: NPH (Humulin N, Novolin N)
Has a peak which can result in hypoglycemia
Long-acting: Glargine (Lantus) and Detemir (Levemir)
Injected once a day at bedtime or in the morning
Released steadily and continuously
Has no peak action thus decrease risk of hypoglycemia
Do not physically mixed with any other insulin or solution
Intermediate acting insulin
NPH (Humulin N, Novolin N)
Has a peak which can result in hypoglycemia
Long-acting insulin
Glargine (Lantus) and Detemir (Levemir
Long acting insulins
Lantus and Levemir for Basal
Injected once a day at bedtime or in the morning
Released steadily and continuously
Has no peak action thus decrease risk of hypoglycemia
Do not physically mixed with any other insulin or solution
NPH appearance
is cloudy
Rapid Acting times
onset: 10-30min
peak: 30min-3 hrs
duration: 3-5hr
Rapid Acting names
lispro Humalog
aspart NovoLog
gluslisine Apidra
Short Acting times
onset: 30-60min
peak: 2-5 hr
duration: 5-8 hr
Short Acting names
Regular: Humulin R
Novolin R
Intermediate acting times
onset: 1.5-4hr
peak 4-12 hr
duration 12-18 hr
Intermediate names
NPH: Humulin N, Novolin N
Long acting names
glargine Lantus
detemir Levemir
Long acting times
onset: .8 -4hr
peak: no pronounced peak
duration: 24 plus hours
mixing insulins
Mixing insulins: always withdraw Regular insulin first then NPH
combination insulin therapy
Short- or rapid-acting combined with intermediate-acting or long-acting insulin to provide basal-bolus coverage
There are commercially premixed formula available: 70/30, 75/25, 50/50
The client with type I diabetes mellitus is taught to take NPH (Humulin N) at 5 pm. each day. The client should be instructed that the greatest risk of hypoglycemia will occur at about what time?
1 am, while sleeping
Insulin storage (4 points)
- Do not heat/freeze, extra insulin should be refrigerated
- In-use vials may be left at room temperature up to 4 weeks
- Avoid exposure to direct sunlight
- Vials or prefilled syringes should be generally rolled between the palms before injection
what size syringe to use for insulin?
0.3 or 0.5 ml syringe
How long to leave syringe in place after injection?
5 seconds
Administration of insulin:
what site has fastest absorbtion?
Abdomen, followed by arm, thigh, butt
Do not inject insulin into site..
that is to be exercised
Insulin & alcohol wiping
At home, by patient: not recommended.
In the hospital, by nurse: absolutely…to prevent HAIs
Insulin concentrations
usually 100 units/ml