Local Anesthetics Dosages Flashcards
Chloroprocaine alternate name:
Nesicaine
Chloroprocaine structure
ester local anesthetic
Chloroprocaine MOA:
- Reversibly block Voltage Gated Na channels- lipid soluble portion crosses lipid bilayer, while the water-soluble portion binds internally to the Na channel- this prevents propagation of AP
- Interrupt nerve impulse conduction (at least 3 nodes of ranvier)
- Inhibit cardiac channels
- Block nerve conduction (autonomic, somatic sensory & motor)
- Potency dependent on solubility, onset dependent on pKa, duration dependent on protein binding
- Will lose sympathetic, pain, temp, proprioception, touch, pressure, motor (in that order & will recover in reverse)
- Easiest to block B, C, A delta, A gamma, A beta, A alpha (in that order)
Chloroprocaine Onset:
6-12 min
Chloroprocaine pKa:
9.1
Chloroprocaine duration of action:
30-60 min
Chloroprocaine PB:
0%
Chloroprocaine Metabolism:
Plasma esterases, Renal
Chloroprocaine max dose plain:
11 mg/kg (800 mg max)
Chloroprocaine max dose with epi:
14 mg/kg (1000 mg max)
Chloroprocaine infiltration Brachial plexus dose:
30-40 mL
Chloroprocaine digital w/o epi dose:
3-4 mL
Chloroprocaine side effects:
- C - CNS Toxicity
- A - Arrhythmias
- L - Loss of pain
- L - Loss of proprioception
- L - Loss of movement
Chloroprocaine contraindications / cautions:
- L - LAST (anxiety, tinnitus, seizure)
- A - Allergy
- S - Seizures
- T - Tissue Damage
- T - Transient Neurologic symptoms
Lidocaine alternate name:
Xylocaine
Lidocaine structure:
- Amide – benzine ring and piperidine ring connected by an amide bond
Lidocaine MOA:
- Reversibly block Voltage Gated Na channels- lipid soluble portion crosses lipid bilayer, while the water-soluble portion binds internally to the Na channel- this prevents propagation of AP
- Interrupt nerve impulse conduction (at least 3 nodes of ranvier)
- Inhibit cardiac channels
- Block nerve conduction (autonomic, somatic sensory & motor)
- Potency dependent on solubility, onset dependent on pKa, duration dependent on protein binding
- Will lose sympathetic, pain, temp, proprioception, touch, pressure, motor (in that order & will recover in reverse)
- Easiest to block B, C, A delta, A gamma, A beta, A alpha (in that order)
Lidocaine Onset:
1-2 min
Lidocaine pKa:
7.9
Lidocaine duration of action:
1-2 h
Lidocaine PB:
75%
Lidocaine metabolism:
CYP3A4 – metabolite monoethylglycinexylidide is responsible for antiarrhythmic properties even after infusion discontinuation
Lidocaine w/o epi max dose:
4.5 mg/kg (max 300 mg)
Lidocaine with epi max dose:
7 mg/kg (max 500 mg)
Lidocaine Attenuate SNS dose:
1-1.5 mg/kg
Lidocaine Arrhythmia dose:
2 mg/kg bolus followed by
1-4mg/min infusion
Lidocaine arrest dose:
3 mg/kg Q 3-5 min
Lidocaine pain dose:
1-3 mg/kg/hr (IBW)
Lidocaine side effects:
- C - CNS Toxicity
- A - Arrhythmias
- L - Loss of pain
- L - Loss of proprioception
- L - Loss of movement
Lidocaine Contraindications / cautions:
- L - LAST (anxiety, tinnitus, seizure)
- A - Allergy
- S - Seizures
- T - Tissue Damage
- T - Transient Neurologic symptoms
Bupivacaine alternate name:
Marcaine
Bupivacaine structure:
~ Amide - benzine ring and ~ piperidine ring connected by an amide bond
~ Racemic mixture
Bupivacaine MOA:
. Reversibly block Voltage Gated Na channels- lipid soluble portion crosses lipid bilayer, while the water-soluble portion binds internally to the Na channel- this prevents propagation of AP
2. Interrupt nerve impulse conduction (at least 3 nodes of ranvier)
3. Inhibit cardiac channels
4. Block nerve conduction (autonomic, somatic sensory & motor)
5. Potency dependent on solubility, onset dependent on pKa, duration dependent on protein binding
6. Will lose sympathetic, pain, temp, proprioception, touch, pressure, motor (in that order & will recover in reverse)
7. Easiest to block B, C, A delta, A gamma, A beta, A alpha (in that order)
Bupivacaine Onset:
5-10 min
Bupivacaine pKa:
8.1
Bupivacaine duration of action:
2-12 h
Bupivacaine PB:
95%
Bupivacaine metabolism:
Liver CYP3A4
Bupivacaine w/o epi max dose:
2.5 mg/kg (max 175 mg)
Bupivacaine with epi max dose:
3 mg/kg (max 225 mg)
Bupivacaine side effects:
- C - CNS Toxicity
- A - Arrhythmias
- L - Loss of pain
- L - Loss of proprioception
- L - Loss of movement
Bupivacaine Contraindications / cautions:
- L - LAST (anxiety, tinnitus, seizure)
- A - Allergy
- S - Seizures
- T - Tissue Damage
- T - Transient Neurologic symptoms
Ropivacaine alternate name:
Naropin
Ropivacaine structure:
~ Amide – benzine ring and piperidine ring connected by an amide bond
~ Pure S enantiomer
Ropivacaine MOA:
- Reversibly block Voltage Gated Na channels- lipid soluble portion crosses lipid bilayer, while the water-soluble portion binds internally to the Na channel- this prevents propagation of AP
- Interrupt nerve impulse conduction (at least 3 nodes of ranvier)
- Inhibit cardiac channels
- Block nerve conduction (autonomic, somatic sensory & motor)
- Potency dependent on solubility, onset dependent on pKa, duration dependent on protein binding
- Will lose sympathetic, pain, temp, proprioception, touch, pressure, motor (in that order & will recover in reverse)
- Easiest to block B, C, A delta, A gamma, A beta, A alpha (in that order)
Ropivacaine Onset:
10-20 min
Ropivacaine pKa:
8.1
Ropivacaine duration of action:
2-8 hr
Ropivacaine PB:
95%
Ropivacaine metabolism:
CYP3A4
Ropivacaine infiltration plain max dose:
3mg/kg (200 mg max)
Ropivacaine side effects:
- C - CNS Toxicity
- A - Arrhythmias
- L - Loss of pain
- L - Loss of proprioception
- L - Loss of movement
Ropivacaine Contraindications / cautions:
- L - LAST (anxiety, tinnitus, seizure)
- A - Allergy
- S - Seizures
- T - Tissue Damage
- T - Transient Neurologic symptoms