Intravenous sedation Flashcards
What is the brand name for Midazolam?
Hypnovel
What is the brand name for Propofol?
Diprivan
What is the brand name for flumazenil?
Annexate
What is the half life of midazolam?
1.5 - 2.5 hours
What is the half life of flumazenil?
50 minutes
What is the initial recommended bolus of midazolam to ASA I patients?
2mg over 30 seconds
What is the initial recommended bolus of midazolam to elderly patients?
1 - 1.5mg, observe for 2 minutes+
Name 3 side effects of midazolam
Respiratory depression
Coughing
Headaches & drowsiness
Nausea & vomiting
If midazolam is used in conjunction with an opiate, which drug should be administered first?
Opiate
What is the pH of midazolam?
3.4
Name the 3 dosages that midazolam is available in
10mg in 5ml
10mg in 2ml
5mg/5ml
When did midazolam first become available in the UK?
1983
What should NOT be administered to a patient experiencing anaphylaxis from midazolam?
Flumazenil - It is a benzodiazepine like midazolam, therefore it should not be used as a reversal drug if someone is allergic to benzodiazepines
What is the onset time of midazolam?
1 - 3 minutes
Midazolam should be titrated in ___ mg increments
0.5 - 1mg increments
What does GABA stand for?
Gamma Amino Butyric Acid
How many phases are there in intravenous sedation?
4 Phases
What drug is not licenced for use in general dental practices?
Propofol
What emulsion is propofol available in?
200mg/20ml
Midazolam is excreted by the ___ ?
Kidney
What is the maximum dose of flumazenil that can be administered in a medical emergency?
1mg
When two or more drugs are used in conjunction together, what is this known as?
Advanced sedation
Why is erythromycin contraindicated in midazolam use?
It inhibits the metabolism of midazolam, increasing it’s effect
What is the alpha half life of midazolam?
4 - 18 minutes
What is the beta half life of midazolam?
1 - 4 hours
What does alpha half life relate to?
How the drug is redistributed throughout the body
What does the beta half life relate to?
How the drug is eliminated from the body
What is the recovery time for Propofol?
5 minutes
What is the half life of flumazenil?
50 minutes
What is the half life of Propofol?
2 - 24 minutes
What is the reversal drug for fentanyl?
Naloxone Hydrochloride
What is the dosage for ketamine?
1-2mg per kg IV
If midazolam and Propofol are used together, what will you need?
A dedicated sedationist
What are 3 contraindications to flumazenil?
Benzodiazepine dependence
Coronary heart disease - Stress of reversal places unnecessary stress on the heart
Epilepsy - most epilepsy medication belongs to the benzodiazepine family, therefore flumazenil will reverse their epilepsy medication
What schedule controlled drug is Propofol?
Schedule IV (4) therefore should be under lock and key
Name 3 contraindications for Propofol
Prescribed respiratory depressants
Pregnancy & nursing mothers
Allergy to eggs
What is beta half life?
Metabolism and excretion - drug is broken down by the body and eliminated
What is alpha half life?
Distributions and redistribution - the drug is introduced into the body and redistributed throughout
After how long is it expected a patient will reach stage four of sedation?
An hour
What is phase 1 of intravenous sedation?
The drug is at its maximum potency.
Co-ordination is impaired
Positive eve’s sign
Unaware of surroundings
What is phase 2 of intravenous sedation?
Alpha half life begins - drug potency decreases as it is redistributed throughout the body
Awareness increases
What is phase 3 of of intravenous sedation?
Anxiolytic effect is still active
Patient starts to feel more like themselves
Beta half life has not yet occured
What is the usual dose of midazolam during IV sedation?
2.5mg - 7.5mg
When two intravenous drugs are titrated together, it is known as what?
Polypharmacy
What drug enhances the metabolism of midazolam?
St John’s wort - resulting in a reduced effect
How many vials of flumazenil should be available when sedation is taking place?
minimum of two
1mg of flumazenil equates to how many ampoules?
2
How is flumazenil excreted?
Urine
Which intravenous drug does not have a reversal?
Propofol
What schedule drug is Propofol?
Schedule IV
Which drug can be administered intravenously, but also drank as a liquid?
Midazolam