meds; opioids Flashcards
Morphine intraop dose
1-10 mg
Mu 1 receptor effects
analgesia
euphoria
no dependence
hypothermia
bradycardia
miosis
urinary retention
Morphine Postop dose
5-20 mg
Mu2 receptor effects
analgesia
physical dependence
constipation
depression of ventilation
Onset for morphine
10-20 min
Kappa receptor effect
anaglesia
dysphoria/sedation
no dependence
miosis
diuresis
antishivering
duration of morphine
4-5 hr
Delta receptor effect
anaglesia
depression of ventilation
physical dependence
constipation
urinary retention
pruritis
Morphine MOA
receptors; Mu1 and Mu 2
dull> sharp pain
General opioid side effects
chest wall and abd rigidity
cardiac protective
sphincter of opioid spasm (fent>morphine> meperidine)
x placenta
Morphine side effects
hydrophilic = slow cephalad spread w/ blocks
MU 1 and 2 effects
Morphine metabolism
glucuronic acid conjugation -> active metabolites (morphine - 6)
Fentanyl intraop dose
1-3 mcg/ kg
IBW
onset of fent
30-60 seconds
duration of fent
1-1.5 hr
Fent potency
75-125 x more pot than morphine
Side Effects of fent
increase ICP
depression of carotid sinus baro r
potentiates benzos
(lipophilic)
Fent metabolism
lung first pass effect; 75%
cyp3A -> norfentanyl
Fent MOA
Mu 1 and 2 > kappa and delta
Sufent intraop dose
0.3-1mcg/kg
Sufent MOA
› Highly selective mu opioid receptor agonist
sufent onset
30-60 seconds
Sufent concentration
50mcg/ml
Sufent duration
1-1.5 hr
sufent gtt dose
0.5-1 mcg/kg/ hr
Sufent potency
Fent < sufent
1000 x more potent than morphine
sufent side effect
bradycardia
(lipophilic)
sufent metabolism
alpha 1 acid glycoprotein binding (92.3%)
60% lung first pass
hepatic metabolism
remifent intraop dose
load; 0.5-1 mcg/kg over 1 min
**IBW
Remifent trade name
Ultiva
remifent onset
30-60 sec