Local And General Anaesthesia Flashcards
Gow Gates and Akinosi techniques are for
Intraoral Mandibular anaesthesia
The Needle is inserted and directed ……… to the Lateral pterygoid plate below foramen ovale for extraoral mandibular anaesthesia.
Posterior
The Needle is inserted and directed ……… to the Lateral pterygoid plate into the pterygomandibular fossa for extraoral maxillary anaesthesia.
Anterior
Example of long acting local anaesthetic is……..
Etidocaine - 200 mins
Bupivacaine - 180 mins
Theories of Local anesthetic action are
- Membrane Expansion Theory
- Calcium Displacement Theory
- Electrical Potential Theory
- Specific Receptor Theory (most accepted Theory)
In hemophilia the technique of local infiltration applied is ………
Intraligamentary (Intraosseous technique) the solution is deposited in the depth of gingival sulcus.
the needle is inserted APICALLY into the bone until resistance is met.
Adrenaline should not be combined with which local anaesthetic?
Cocaine (natural local anaesthetic) has vasoconstrictor action of increases vasoconstrictive action of Adrenaline. Lethal in case of cocaine abusers, they’re called Walking Time Bombs.
Maximum dose of Lidocaine without Adrenaline is
4 mg/kg body weight not exceed 300 mg.
Maximum dose of Lidocaine with vasoconstrictor is
7 mg/ kg body weight should not exceed 500mg
Gate Control Theory was proposed by
Melzack and Wall (1965)
the amount of vasoconstrictor in 1 ml of 2% lidocaine with 1: 2,00,000 adrenaline is
0.005 mg
Muscle pierced by needle when giving interior alveolar nerve block is
Buccinator
Which muscle is pierced by needle while giving interior alveolar nerve block?
Buccinator
A bilateral Mandibular block
is dangerous because of Tongue fall but NOT CONTRAINDICATED.
General Anaesthesia techniques should be used in oral surgery
Nasoedotracheal Tube with throat pack
Long acting but toxic LA is
Dibucaine
Which drug is used to prevent Laryngospasm due to GA
Succinylcholine
Absolute contraindication for the use of local anaesthetic is
Hypersensitivity to the drug
Inferior alveolar nerve block is absolutely contraindicated in patients suffering from -
Hemophilia
Inferior alveolar and posterior superior alveolar should be avoided due to possibility of dissecting hematoma. Factor 8 replacement therapy indicated and Interligamentary Technique is preferred.
Which nerve fibre are sensitive to LA
C Fibres
Possible Side effects of systemic absorption of Lidocaine
Tonic Clonic Convulsions
Decreased Cardiac output
Respiratory Depression
Lidocaine is used more commonly in dentistry because
Causes lesser incidences of allergic reaction
La with adrenaline is absolutely contraindicated in
Hyperthyroidism
When blocking a nerve containing both Motor and sensory fibres , the last functional property lost is
Proprioception
technically it’s Skeletal Muscle Tone.
First sensation lost is PAIN
Improper Needle insertion during inferior alveolar nerve block causes
Facial nerve Paralysis
also , Hematoma and Trismus
Improper Needle insertion during inferior alveolar nerve block causes
Facial nerve Paralysis
also , Hematoma and Trismus
Akinosi Vazarani technique is a …. mouth technique
Closed
Hematoma formation is more common with
Posterior Superior alveolar Nerve Block
Toxicity of local anaesthesia is reversed by
IV Barbiturates
Prilocaine is safer than lignocaine (True or False)
True
Onset of Lidocaine
3-5 minutes
Sedatives used in dentistry
Benzodiazepines
action of Adrenaline is potentiated by
Halothane
Ethyl Chloride
Cyclopropane
Actions of Long acting Muscle Relaxants used in GA Maybe terminated by using…..
Neostigmine
The cause of sensation of tissue tearing during local anaesthesia administration is due to
Barb on the Needle
Increase incidence of reaction to LA will occur by
rapid Rate of injection
Excess plasma levels of Lignocaine can cause cardiovascular collapse due to
Myocardial Depression
the LA with sympathomimetic activity
cocaine
which respiratory condition is most alarming during patient sedation in Dental clinic
Apnea
Onset of Lidocaine action is
3-5 minutes
Side effects of systemic absorption of Lidocaine
Tonic Clonic Convulsions
Decreased Cardiac Output
Respiratory Depression
Which is the suitable anesthetic for a hypertensive patient suffering from a heart disease
Prilocaine and Felypressin
Action of Procaine is terminated by
Metabolism in the liver and by pseudo cholinesterase in the plasma
most common complication occuring due to GA within first 24 hours after surgery is
Atelectasis
Most significant adverse consequences of intravenous LA is
Seizures
most common LA combination used is
1: 80,000 Xylocaine HCL
Sodium Meta bisulfite in LA acts as a
Reducing Agent
Maximum allowable dose of 2% lidocaine with 1:1ooooo Epinephrine for a child of 40 lbs is
120 mg
Which combination forms daycare Anaesthesia
Fentanyl
propofol
isoflurane
Kelsey Fry Technique refers to remocal in
Impacted Mandibular 3rd Molars
nerves anesthetized in incisive Nerve block are
incisive and mental nerve
In a patient with Trismus, technique that will block mylohyoid nerve, incisive nerve and long buccal nerve
Akinosi Vazarani technique
