Pharmacology Lecture Flashcards
What is versed most frequently used for?
Anxiolytic and as an amnestic
In what kinds of cases can versed be used as an induction agent?
Longer cases, its duration of action limits its use to longer OR cases.
What is versed’s duration of action?
2 to 6 hours
What drug class is versed a member of?
Benzodiazepine
What are two important things to remember about versed before giving it?
- It can be painful
2. Dose may have to be adjusted due to tolerance issues of the patient
What drug can be used to reverse versed?
Fluemazenil/Romazicon
What is the induction dose of versed?
.1-.25 mg/kg for induction
Why is versed given in preop?
For anxious folks and for it amnestic qualities…it is given at smaller doses for these. Less than the induction doses
What is versed’s onset?
1 to 5 minutes
What is versed’s peak?
5 to 30 minutes
What is the duration of action of versed?
2 to 6 hours
What is the non-induction preop dose of versed?
1 to 5 mg
When given to patients with existing pulmonary disease and when given with other sedatives what can happen?
Respiratory depression
What is the other name for versed?
Midazolam
What is the dose of propofol?
1 to 2.5 mg/kg
What is another name for vecuronium?
Norcuron
What is the primary advantage of using propofol?
Its short duration of action. No “HANGOVER AFFECT”
What is the onset time of propofol?
15 to 30 seconds
What is the duration of action time for propofol?
5 to 10 minutes
In what type of allergy should propofol not be used in?
Egg allergy
What is a frequent complaint of propofol administration?
Pain
What are three ways the pain of propofol infusion can be averted?
- bigger vein
- bigger IV
- give lidocaine?
Besides being allergic to eggs, what other type of patient should propofol not be used in?
It is a cardiac suppressant, so it should not be used in a very sick patient as it tends to drop the BP…i.e. ASA 3 or 4 patients
Besides it induction properties, what is another characteristic of propofol?
antiemetic
Besides induction, what other case is propofol used for and why?
Its used as a sedative in MAC(minimal anesthesia care) cases, in these cases there is suppose to be no loss of lid reflex, so not general anesthesia
What drug should be used to induce sick patients that might not tolerate the cardiac suppressant affects of propofol?
Ketamine
What can be a reason not to use etomidate to induce a patient?
Nausea and Vomiting
What is two of the hallmark properties of using etomidate?
- Its cardiovascular stability
2. Its fast onset
What type of patient would be the ideal patient for etomidate?
The critical ill, ASA class 3 or 4 patient with no history of N and V with anesthesia
What is something to remember about the administration of etomidate?
Its painful due to being mixed in a propylene glycol solution
Why might you pretreat with fentanyl before giving etomidate?
To decrease the incidence of myoclonia/twitching movements…they go away when the patient is fully induced
What is the concentration of etomidate?
2 mg/ml
What is etomidate’s onset?
15 to 30 seconds
What is the duration of etomidate?
3 to 10 minutes
What is the dose of etomidate?
0.2-0.4 mg/kg
When would you decrease the dose of etomidate?
When it is given in conjuction with sedatives, opioids and hypnotics
What is a complication of Brevital?
Seizures…does not lower the sz thresh hold like propofol does
What is the drug class of Brevital?
Barbiturate
Brevital shares a similar effect as Etomidate….what is it?
Excitatory movements
In what type of patient should you avoid Brevital?
Epileptic
What is the concentration of Brevital?
10 mg/ml
What is the dose of Brevital?
1.5 to 2.5 mg/kg
What is the onset of Brevital?
20 - 40 seconds
What is the duration of action of Brevital?
5 to 10 minutes
What kind of depressant is Brevital?
Respiratory
Ketamine is a derivative of what?
PCP
What is a disturbing emergency reaction of Ketamine?
“Bad Trips”
What is the only induction agent that also has analgesia properties?
Ketamine
How does ketamine affect the HR and BP?
Ketamine is excellent for many critically ill patients as it increases both HR and BP. May be contraindicated in patients who cannot tolerate high heart rates or blood pressure. i.e. aortic stenois and patients with high ICP
Besides causing nightmares and “bad trips”, what other negative side affect does Ketamine have?
Increased secretions
What drug can help control the negative affects of Ketamine?
Robinol
What type of agent is Ketamine?
Opioid induction agent
What receptors are stimulated by Ketamine?
Kappa and Sigma
What is the 3 different types of concentration of Ketamine?
50 mg/ml
10 mg/ml
100 mg/ml
What is the typical IV induction dose of Ketamine?
1-2 mg/kg
What is the IM induction dose of Ketamine?
4 - 8 mg/kg
What is the onset of Ketamine?
30 - 60 seconds
How do you know when Ketamine has started to work?
The patient will have nystagmous
How long does Ketamine’s hypnotic affect last?
15 minutes, analgesia affect last much longer
What is the standard concentration of Fentanyl?
50 mcg/ml
At what dose does Fentanyl start having anagesia effects?
0.5 mcg/kg
At what dose is Fentanyl given when it is the primary anesthetic?
100 mcg/kg
What is the onset time for Fentanyl?
Typically about 30 seconds or 1 to 2 circulation.
What is the duration of action for an analgesic dose of Fentanyl?
30-60 minutes