IHS - Pharmacology

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Shells33
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275668
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IHS - Pharmacology
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2014-05-30 10:39:17
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Anesthesia Pharmacology CRNA
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IHS - Pharmacology
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  1. What is the benefit of giving Fentanyl and Morphine together at the beginning of the case?
    Different rates of metabolism so you have a sustained therapeutic effect with little risk of narcotic overdose while trying to extubate
  2. What is the goal of pre-op medication?
    ensure the patient is anxiety and pain free
  3. What must you do PRIOR to administering anything pre-op?
    Make sure consent and patient ID are completed, and the patient has met the surgeon
  4. What is the therapeutic effect of a benzodiazepine?
    relief of anxiety, sedation, amnesia
  5. What is the class and standard dose of Midazolam?
    • Benzodiazepine
    • 1-2 mg IV
  6. What is the class and standard dose of Diazepam?
    • Benzodiazepine
    • 5-10 mg IV or PO
  7. What is the class and standard dose of Lorazepam?
    • Benzodiazepine
    • 0.5-2 mg IV or PO
  8. What is an absolute contraindication to administration of benzodiazepines?
    No urine pregnancy test in someone of childbearing years
  9. What are the 2 disadvantages to benzodiazepines?
    • 1) excessive/prolonged sedation in elderly
    • 2) may interfere with release of cortisol in response to stress
  10. What is the therapeutic effect of an opioid?
    analgesia
  11. What is the class and standard dose for Fentanyl?
    • Opiod
    • 25-100 mcg IV
  12. What is the class and standard dose for morphine?
    • opioid
    • 5-15 mg IV
  13. What is the class of dilaudid?
    opioid
  14. What is the class of demerol?
    opioid
  15. What are the 6 disadvantages of opioids?
    • 1) resp depression (increased CO2 threshold)
    • 2) orthostatic BP
    • 3) N/V
    • 4) delayed gastric emptying (PO med metabolism, increased risk of n/v/aspiration)
    • 5) biliary tract spasm (difficult for ERCP)
    • 6) itching
  16. What is the primary therapeutic effect of anicholingergics?
    • 1) antisialagogue (less saliva)
    • 2) prevention of reflex bradycardia
    • 3) sedative/amnestic - EXCEPT glycopyrolate
  17. What is the class and standard dose of atropine?
    • anticholinergic
    • 0.5 mg IV
  18. What is the class and standard dose for glycopyrrolate?
    • anticholinergic
    • 0.1 mg IV
  19. Should you use anticholinergics routinely?
    No - best for risks you can foresee and oral/prone/supine cases
  20. Why is an anticholinergic beneficial when using propofol for induction?
    prevents bradycardia
  21. What are the most common side effects (3) of anticholinergics?
    • CNS suppression
    • tachycardia
    • increased body temp
  22. How does and anticholinergic work?
    competitively binds with muscarinic receptors in the CNS = no acetylcholine binding
  23. What is the primary goal of Bicitra? and how is it different?
    • Goal is to elevate pH of stomach contents (so they are less caustic if aspirated)
    • works IMMEDIATELY - treats what is currently in the stomach
  24. What is the class and dose of Bicitra?
    • antacid
    • 15-30 ml
  25. Is Bicitra used for every case?
    No - only high aspiration risk cases
  26. What is the class, therapeutic effect, and dose of famotidine?
    • h2 antagonist
    • reduces pH of gastric contents being secreted (future - not what is currently there)
    • 20-40 mg PO
  27. What is the class, therapeutic effect, and dose of pantaprazole?
    • proton pump inhibitor
    • increase gastric pH by suppression over the course of several hours
    • 40 mg IV
  28. what is the class, therapeutic effect, dose of omeprazole?
    • proton pump inhibitor
    • reduces acid secreted over next several hours
    • 20 mg PO
  29. What is the therapeutic effect of GI pro kinetics?
    • decrease gastric fluid volume
    • reduce n/v
    • reduces risk of aspiration
  30. What is the class and dose of metoclopramide? how does it work (3 mechanisms)?
    • GI prokinetic
    • 10 mg IV, PO
    • Increases gastric motility, increases LES sphincter tone, decreases pyloric sphincter tone
  31. Who would you NOT give metoclopramide to?
    • Parkinsons - levodopa
    • bowel obstruction
  32. What is the therapeutic effect of alpha2 agonists?
    decreases SNS responses
  33. What is the class and dose of clonidine?
    alpha2 agonist
  34. Who requires triple treatment for aspiration prevention? what does it include?
    • high risk patients
    • bicitra, pepcid, reglan
  35. What is the mechanism of action for Thiopental?
    depression of the Reticular Activating System (via inhibition of GABA)
  36. What is the dose and duration of Thiopental?
    • 5 mg/kg
    • 5-10 mins
  37. If you have a CVP port and LR infusing via a separate port, where will you push Thiopental? why?
    CVP - thiopental + LR creates a precipitate
  38. Can you push Thiopental and Vecuronium back to back?
    No - creates precipitate
  39. What is the mechanism of action of Propofol?
    inhibitory transmission mediated by GABA
  40. What is the induction dose for propofol? maintenance dose? duration?
    • Induction: 2 mg/kg
    • Maintenance: 100-200 mcg/kg/min (hypnosis), 25-70 mcg/kg/min (sedation)
    • Duration: 5-10 mins
  41. Who can NOT receive propofol?
    egg allergy
  42. What is the mechanism of action for Etomidate?
    binds to subunit of GABA (increases affinity of GABA) --> depression of RAS
  43. What is the dose and duration of Etomidate?
    • dose: 0.25 mg/kg
    • duration: 3-12 minutes
  44. What should you co-administer with etomidate? why?
    a muscle relaxant - may cause myoclonus
  45. What is the Mechanism of Action of Methohexital?
    depression of RAS (via enhanced transmission of inhibitory neurotransmitters such as GABA)
  46. What is the dose of methohexital? duration?
    • dose: 2mg/kg
    • duration: 5-10 mins
  47. What type of NMB agent is Succinylcholine?
    depolarizing
  48. What is the dose of succinylcholine? the onset? the duration?
    • dose: 1 mg/kg
    • onset: 1 minute
    • duration: less than 10 mins
  49. What 4 things does succinylcholine increase?
    • 1: intraoccular pressure
    • 2: intragastric pressure
    • 3: intracranial pressure
    • 4: serum potassium levels (0.5-2 pts)
  50. What are the 4 M's of succinylcholine?
    • 1: Malignant Hyperthermia (masseter muscle rigidity is sign)
    • 2: Myalgia's
    • 3: Myocardium (muscarinic bradycardia)
    • 4: Myopathies (Duchenne's dystrophy)
  51. What type of NMB is vecuronium?
    non-depolarizing
  52. What is the intubation dose, onset, and duration of vecuronium?
    • dose: 0.1 mg/kg
    • onset: 2-3 mins
    • duration: 45-90 mins
  53. What is so great about vecuronium?
    very predictable re-dosing
  54. What type of NMB is rocuronium?
    non-depolarizing
  55. What is the intubation dose, onset, and duration of rocuronium?
    • dose: 1 mg/kg (0.45-1.2)
    • onset: 1.5 minutes
    • duration: 35-75 minutes
  56. What does Sugammadex do?
    reverses rocuronium
  57. What type of NMB is cisatracuruim?
    non-depolarizing
  58. What is the intubation dose, onset, and duration for cisatracuruim?
    • dose: 0.2 mg/kg
    • onset: 2-3 minutes
    • duaration: 40-75 minutes
  59. What is an advantage of using cisatracuruim?
    cleared via spontaneous nonenzymatic breakdown - not dependent upon ANY organ system
  60. What is the MAC for N2O (nitrous oxide)?
    105%
  61. What 2 populations should you NOT use N2O?
    • 1: pregnancy
    • 2: suspected air pockets (air embolism, pneumothorax, intestinal obstruction, intracranial air)
  62. What is the MAC for isoflurane?
    1.2%
  63. What are 2 risks with isoflurane?
    • 1: dilates coronary arteries so may "steal" blood from stenotic fixed arteries
    • 2: >1% = increased ICP d/t vasodilation
  64. Will you need more or less non depolarizing NMB when using isoflurane?
    less
  65. What is the MAC of desflurane?
    6%
  66. How does the wake up time of desflurane compare to isoflurane?
    wake up times are 50% less
  67. What is the MAC of sevoflurane?
    2%
  68. Is sevoflurane rapid or slow in re: uptake and elimination?
    rapid
  69. Does sevoflurane make pediatric cases more or less difficult? why?
    nonpungent, relaxes enough for intubation
  70. What must you always administer with sevoflurane? why?
    2 liters fresh gas - may cause nephrotoxic compound A
  71. Why are anticholinesterases given?
    to "reverse" a non-depolarizing NMB - prevents the breakdown of ACh which allows more available to competitively knock NMB of post synaptic receptor
  72. What is neostigmine?
    anticholinesterase
  73. What is the dose, onset, and duration of neostigmine?
    • dose: 0.05 mg/kg (max EVER is 5mg)
    • onset: 5-10 mins
    • duration: 1 hour
  74. Why do we give an anticholinergic with neostigmine?
    flooding of cholinergic receptors can produce bradycardia to the point of asystole

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