Chapter 44: care for patients with diabetes Flashcards
Diabetes mellitus is a group of disorders characterized by elevated blood glucose levels and results from defects in what?
insulin production, insulin action, or both.
what three sources does glucose arrive in the blood from?
carbs eaten, glucose released from stored glycogen in muscles and liver cells, glucose or gluconeogenesis newly created in the liver or in the kidney cells
where is glucose in the blood stream transported to?
target cells
insulin is released from where?
pancreatic beta cells
when there is a disruption in the production of insulin or in the effective action of insulin glucose cannot cross the cell membrane effectively and stays where?
glucose remains in the blood stream and blood glucose levels rise above normal
insulin facilitates the transport of what?
the transport of glucose across the cell membrane into the cell’s interior
what is glucose metabolized as in the cell?
fuel releasing energy
what happens when blood glucose levels get too high?
more insulin is secreted by the pancreas. when blood glucose is driven into the cell and metabolized the glucose levels in the blood fall.
what happens when blood glucose gets too low?
insulin release is suppressed and glucose will remain in the bloodstream instead of being pushed into the cells. glucagon is released from the pancreatic alpha cells and stimulates the production and release of glucose from glycogen storage in the liver.
what are the different groups of diabetes mellitus?
Prediabetes; type 1 and type 2. and gestational diabetes
what is type one diabetes triggered by?
an autoimmune process where insulin producing beta cells of the pancreas are destroyed
describe the disease process of type one diabetes in children and young adults
the process is usually rapid, with a total insulin deficiency occurring within one year. after this lifelong insulin injections are required
describe the disease processes of type one diabetes in an adult.
the autoimmune destruction of beta cells has a more variable, but generally slower time frame.
what are some clinical manifestations of type one diabetes
polydipsia, polyuria, polyphagia, fatigue, weight loss
what is the required level of FPG for type 1 or 2 diabetes?
greater than 126 mg/dl with 8 hour fast
what is the required level of OGTT for type 1 or 2 diabetes?
2 hour 75g OGTT greater than 300 mg/dl
what is the required level of random plasma glucose for type 1 or 2 diabetes?
greater than 200 mg/dl with classic symptoms of hyperglycemia or hyperglycemic crisis
what level of A1C is considered prediabetic?
5.7-6.4
what is the target fasting glucose level?
A goal of 70-130 mg/dl for an HgbA1c goal less than 7%. target blood glucose readings can be higher or lower depending on individualized HgbA1c goal
what is the target 2 hour postprandial level?
average 2 hour postprandial blood glucose value less than 180mg/dl.
what can a 2 hour post prandial reading be helpful for?
It is helpful for adjusting mealtime medications
lowering hgbA1c to below or around 7% has been shown to do what?
reduce microvascular and neurological complications of type 1 and type 2 diabetes.
modern insulin analog and pumps closely mimic what
the actions of a healthy pancreas
why are oral insulin administrations noneffective?
it is broken down and rendered ineffective during the digestive process
what two diets could you educate a patinet with diabetes on?
ADA and DASH
what type of exercise could you educate a diabetic patient about
150 minutes of aerobic exercises a week
how often should you check blood glucose levels?
ACHS (before meals and at bedtime)
what type of treatment plan is the most effective at maintaining tight glucose control?
treatment plans that mimic the response of the healthy pancreas to blood glucose levels during the course of a day
what is an alternative approach to insulin administration?
continuous subcutaneous insulin pump
how often should a patinet with well controlled diabetes have their HgbA1C checked?
at least twice a year
if glycemic target has not been met or if a patient is having treatment changes how often should HGBA1C be checked?
every 3 months
what could an increased serum BUN/creatinine level indicate?
decreased renal function associated with microvascular changes that develop in the kidneys due to sustained hyperglycemia
Decreased perfusion secondary to microvascular changes may manifest as what?
delayed capillary refill
Using the same site for insulin administration will result in what?
Insulin lipodystrophy due to buildup of scar tissue in the area. This results in resistance
who is type 2 diabetes more common in?
adults
what was type 2 diabetes once called?
adult onset diabetes
what are 2 risk factors for type 2 diabetes?
genetics and lifestyle
what is a warning sign for type 2 diabetes?
prediabetes
what BMI is considered underweight?
BMI is less than 18.5
what BMI is normal weight?
BMI is 18.5 to 24.9
what BMI is overweight?
BMI is 25 to 29.9
what BMI is obese?
30 or more
what level of HDL is considered a modifiable risk factor?
< or = 35 mg/dL
what level of triglycerides is considered a modifiable risk factor?
> or = 250 mg/dL
what are some high-risk ethnic populations for type 2 diabetes?
AA, Latino, Native american, asian american, pacific islander
what is a non-modifable risk factor dealing with mothers?
Women who delivered a baby weighing greater than or equal to 9 lbs or who were diagnosed with gestational diabetes
what level of hypertension is considered a non-modifiable risk factor?
greater than or equal to 140/90 mmHg or on therapy for hypertension
what level of hgbA1C is considered a non-modifiable risk factor?
greater than or equal to 5.7 on previous testing
what prevents the normal action of insulin?
defects at the cell membrane
insulin resistance develops which requires what
an increase in the levels of insulin to drive glucose into the cells
over time the pancreas cannot keep up with the increased demand for insulin and what happens?
beta cell failure
in late stages of type II DM insulin production greatly declines. 30% of patients will require what?
exogenous insulin delivery to maintain normal blood glucose levels
which has a slower onset of manifestations type I or II DM?
type II diabetes?
what are some examples of clinical manifestations of type II diabetes?
polydipsia, polyphagia, polyuria, fatigue, poor wound healing, and recurring infections
what are many of the manifestations of type II diabetes due to?
microvascular and microvascular complications of long-term hyperglycemia
what are some pharmacologic interventions for type II diabetes?
Oral medications that increase insulin production, lower insulin resistance, and slow the absorption of carbohydrates or medications that help with lower blood glucose
which type of insulin has an onset of 1-2 hours?
long acting
which type of insulin has an onset of 15 minutes
rapid acting
what type of insulin has an onset of 2-5 hours
intermediate acting