midterm 1 Flashcards
10 rights
right drug, dose, time, route, pt, reason, documentation, refusal, education, evaluation
chemical name
describes drug chemicals composition & molecular structure
generic name
name given to drug approved by health canada
acetaminophen, ibuprofen
trade name
commercial name given to drug by manufacturer; trademark with marketability (tylenol, advil)
pharmaceutics
how various dosage forms/routes influence way body metabolizes drug & way drug effects body
pharmacokinetics
study of what the body does to drug (what happens to a drug from the time its put into body until it has left)
what phases does pharmacokinetics include
absorption, distribution, metabolism, excretion, onset of action, half life, peak effect, duration of action
absorption
movement of drug from site of admin into bloodstream for distribution (PO, SC, IV)
metabolism
biological transformation of drug (liver most responsible)
distribution
transport of drug in bloodstream to site of action
excretion
eleminiation of drug from body (kidney primary way drug is eliminated) (lesser extent bowel & liver)
onset of action
time it takes for drug to elicit therapeutic response
peak effect
time needed for drug to reach its MAX therapeutic response
duration of action
length of time that concentration is sufficicent to elicit therapeutic response
toxicity
when peak blood level is too high & drug is poisonous
half life
time it takes for 1/2 of drug to be removed from body
why does half life matter
steady state
steady state
amount of drug removed is equivalent to amount absorbed
once reached, consistent levels of drug in body that correlates with max therapeutic benefit
pharmacodynamics
what drug does to body (cellular level)
therapeutic effect
desired or intended effect of particular medication
adverse effect
undesirable effect that are direct response to one or more drugs
toxicity
producing adverse bodily effects due to poisonous qualities
contraindication
any characteristic of pt that makes use of medication dangerous
receptors
molecular structure within or on surface of cells where specific substances bind
agonist
drug that binds to receptors & stimulate activity at receptor site (stimulates response)
antagonist
drug that binds nad inhibits activity at receptor site
diabetes mellitus
disorder of carbohydrate metabolism that involves either deficiency of insulin, resistance of tissue (muscle, liver) to insulin, or both
organ involved in diabetes
pancreas
pancreas & aspects
digestive enzymes & hormones
islets of langerhan (alpha & beta cells)
is pancreas an exocrine or endocrine gland
exocrine because it secretes
islets of langerhan exocrine or endocrine
endocrine, alpha & beta cells secrete insulin
insulin causes high blood glucose t/f
T
glucagon causes low blood glucose t/f
T
beta cells do
secrete insulin
beta cell process
BG high, produce insulin, insulin goes into blood to increase transport of glucose into cells, storing in liver as glycogen & skeletal muscle to decrease BG
alpha cells do
glucagon
alpha cell process
glucagon goes into liver, releases glycogen, BG low –> alpha cells release glucagon to release glycogen to increase BG
blood glucose levels normal & diabetic
normal = 4-6
diabetic = 4-7
hemoglobin A1c
shows how much insulin as sit on hemoglobin molecules & should be < 7% (less thn)
patho of DM
destruction of beta cells in pancreas (insulin deficiency, autoimmune)
defective insulin receptors in tissues (glucose unable to be transported into cells)
cardinal signs of hyperglycemia
polyuria, polydipsia, polyphagia, weight loss, blurred vision, fatigue
type 1
abrupt onset, common in kids, autoimmune destruction of beta cells causing little/no insulin, ketosis
type 1 need exogenous insulin t/f
T
type 2
slower onset, exercise & diet management, oral hypoglycemic agent effective in controlling blood sugar, obese, adapted to hyperglycemia over long period of time
treatments for type 2
education, nutrition, physical activity, weight & lifestyle management, insulin & oral hypoglycemics
insulin is only hormone that
has capacity to lower blood sugar
peak insulin is
most at risk for hypoglycemia (greatest amount of medication in system)
insulin types
rapid, short, intermediate, long
rapid acting onset
10-15min
rapid acting peak
60-90 mins
rapid acting duration
3.5-6 hr
rapid acting names of insulin
aspart (novorapid), lispro (humalog), glulisine (apidra)
rapid acting can be given SC but not IV
T
when can insulin be given
15min before meal
short acting onset
30 min
short acting peak
2-3hr
short acting duration
6.5hr
short acting insulin names
regular insulin (humulin regular, novolin, toronto)
short acting insulin is responding to
peak in blood glucose
short acting = what kind of infusion
IV bolus
intermediate acting onset
2-4hr
intermediate acting peak
4-10hr
intermediate acting duration
12-18hr
intermediate acting insulin names
isophane (humulin N, novolin NPH)
intermediate acting is basal insulin because
reacting to keep the BG at moderate level
goal of intermediate acting
steady state
long acting onset
2-4hr
long acting peak
none
long acting duration
20-24hr
long acting is basal because
provides a prolonged glucose control
long acting insulin names
glargine (lantus), determir (levemir)
which insulin is cloudy
intermediate
insulin preferred route of delivery
basal-bolus
unopened insulin vial kept in fridge, opened vial expires
30 days after opening
insulin side effects
hypoglycemia
weight gain
lipodystrophy
tachycardia, palpitations
headache, weakness, fatigue
hypoglycemia signs
dry mouth
blurred vision
anxious
perspiration
dizziness
diaphoretic
sleepiness
confusion
difficulty speaking
weak
treatment of hypoglycemia
see policy
assess LOC
diabetic protocol (glucose tablets 15g, glucagon SC)
if pt BG not < 4 but reports feeling lightheaded
give snack or juice
antagonist - insulin causes . . . & examples
hyperglycemia
epi, furosemide, niacin, thiazides, thyroid hormone, corticosteroids
protagonist - insulin causes . . . . & examples
hypoglycemia
alcohol, anabolic steroids, sulpha antibiotics
oral hypoglycemic agents (type 2) based on
premise that insulin still being produced
biguanide
metformin, 1st line treatment
action of biguanide
- decrease glucose production by liver
- decrease intestinal absorption of glucose
- improves insulin receptor sensitivity in liver, skeletal muscle, adipose –> increased glucose uptake by organs
side effects of biguanide
abdominal bloating, anorexia, nausea, cramping, feeling full, flatulence, metallic taste, vit b12 reduction
biguanide does not…
stimulate insulin production = does not cause significant hypoglycemia
sulfonylureas is only used
in type 2
sulfonylureas must have
functioning beta cells because it stimulates insulin from beta cells
action of sulfonylureas
stimulates insulin secrete from beta cells
improves sensitivity to insulin in tissue
decreases production of glucagon
side effects of sulfonylureas
hypoglycemia, weight gain, gi symptoms, rashes
sulfonylureas may cause hypoglycemia t/f
T
thiazolidinediones is what type of drug
insulin-sensitizing drug
action of thiazolidinediones
regulates genes involved in glucose & lipid metabolism
decrease insulin resistance by enhancing sensitivity of insulin receptor
does thiazolidinediones cause hypoglycemia
NO
why thiazolidinediones controversial
cardiac risks
gliptins
pt that don’t respond well to metformin & sulfonylureas
action of gliptins
delaying breakdown of incretin hormines –> results in increased insulin & lower glucagon secretion = hypoglycemia
glinides action
increase insulin secretion from pancreas with shorter duration of action & given with meal
glinides structurally different than sulfonylureas but similar mechanism of
action
a-glucosidase is a
inhibitor
example of a-glucosidase
acarbose (glucobay)
action of a-glucosidase
slows down digestion and absorption of glucose post meal
side effects of a-glucosidase
gi symptoms
does a-glucosidase cause hypoglycemia
NO
nursing assessment for diabetes
- assess knowledge & provide education
- type 1 or 2?
- BG levels
- medication effects on BG
- signs hypo/hyperglycemia
describe basal bolus
basal (steady state)
bolus (post meal)
what is the rule for metformin & radiographic tests
held 8 hrs before, 48 hrs after procedure
associated with acute kidney disease, lactic acid
CO =
amount of blood ejected from left ventricle (4-8L/min)
SVR
force (resistance) left ventricle overcome to eject volume of blood (Afterload)
measurement of force of blood against walls of blood vessels
normal BP & HR
100/60 - 139/89
60-100
stage 1 hypertension
130-139 or 80-89
stage 2 hypertension
140 or higher,
or
90 or higher
6 categories of hypertensives
adrenergic
angiotensin - converting enzymes (ACE) inhibitors
angiotensin receptor blockers (ARBs)
calcium channel blockers (CCBs)
vasodilators
diuretics
what do all the hypertensive drugs have
vasodilator effects (decreasing PVR & BP) except diuretics
SNS stimulation
increase HR, force of contractions, vasoconstriction, release of renin from kidney = hypertension
PSN stimulation
conserves energy as slows HR, increases intestinal & gland activity, relaxes sphincter muscles in GI
adrenergic drugs
agonists (CAUSES ACTION) modify finction of SNS
OR
antagonist blocks/prevents action in ANS
alpha 2 adrenergic is a
agonist (causes action) acts by modifying SNS; stimulates alpha 2 adrenergics receptors to decrease SNS activity = vasodilation
is alpha 2 adrenergic central acting
YES
lack of norepinephrine production w/ alpha 2 adrenergic results in
reduced BP & renin
examples of alpha 2 adrenergic
clonidine & methyldopa
renin is
potent vasoconstrictor
why is alpha 2 adrenergic not first line treatment
adverse effects (orthostatic hypotension, fatigue, dizziness)
important thing about alpha 2 adrenergic drugs
not to stop abruptly … severe rebound hypertension
rebound hypertension
sudden & dangerous rise in BP