Anesthetic Agents & Tech 3

  1. What are barbiturates derived from?
    barbituric acid
  2. What do barbiturates do?
    progressive depression of CNS
  3. How do barbiturates work?
    absorbed into the brain and produce unconsciousness
  4. When does recovery occur when using barbiturates?
    recovery occurs when brain levels fall too low to affect the brain
  5. Where are barbiturates redistributed?
    into the liver
  6. Where are barbiturates excreted?
  7. Is there a reversing agent for barbiturates?
  8. Do barbiturates provide any analgesia effect?
  9. Are barbiturates controlled?
  10. How are barbiturates supplied?
    as a powder to be reconstituted
  11. How should barbiturates be stored?
  12. What are barbiturates administered?
    • bolus - all at once
    • give to effect - just enough to anesthetize the patient - half of calculated dose, monitor, additional increments as needed
  13. What could barbiturates cause?
    • respiratory depression
    • apnea
    • cardiovascular depression
  14. What kind of dose should hypoproteinemic receive? Why?
    • lower dose
    • because barbiturates are partially protein binding
  15. What is a vicious cycle?
    being deep causes patient to go deeper
  16. How do you avoid or correct a patient from getting into a vicious cycle?
    • bag regularly
    • use lower dose
    • avoid altogether
  17. Should very lean patients use barbiturates? Why?
    no because barbiturates redistribute in fat and lean patients do not have enough fat for the barbiturates to redistribute in therefore the drug stays in their blood and brain longer and deepens/prolongs anesthesia
  18. What happens to a patient if you inject barbiturates perivascularly?
    causes tissue damage
  19. What happens to a patient if they are underdosed or given barbiturates perivascularly?
    can put patient into stage ll excitement and well be harder to anesthetize
  20. What could a prolonged recovery from barbiturates cause?
    • liver problems
    • kidney problems
    • hypothermia
  21. Should barbiturates be used in sick animals?
  22. What barbiturate is the most commonly used in veterinary medicine?
    thiopental - Pentothal - Schedule lll drug
  23. Which barbiturates are not commonly used?
    • pentobarbital - Nembutal
    • thiamylal - Biotal, Surital
    • methohexital - Brevital
  24. Which barbiturate is now used for euthanasia?
    pentobarbital - Nembutal
Card Set
Anesthetic Agents & Tech 3
Clinical Practice