MIDTERM Flashcards
Reversible loss of feeling or sensation
Anesthesia
Types of ocular anesthesia
Advantage of G/A
Complications of G/A
Objective in G/A
Local anesthetic techniques
General anesthetic techniques
Indications for G/A
Acts by producing reversible block to the transmission of peripheral nerve impulse
Local anaesthesia
Advantages of L/A
Toxicity of L/A
L/A is not suitable for
Disadvantages for L/A
Light headedness
Numbness
Tinnitus
Drowsy
Anxious
Convulsion
Coma
Types of L/A
Amide Group
-lidocaine
-mepivacaine
-bupivacaine
Ester Group
-procaine
-tetracaine
-cocaine
-benzocaine
Advantages of Topic Anesthesia
Cost effective
Immediate visual recovery
Avoidance of complication
Disadvantages of Topical Anesthesia
No akinesia
Not suitable for extended surgery
Well informed and motivated px is required
Adverse effect of T/A
Epithelial and endothelial toxicity
Allergy to drug
Alteration of lacrimation
Surface keratopathy
Uses of topical anesthesia
Manipulation of superficial cornea and conjunctiva
Phacoemulsification in cooperative px
Prior to regional blocks
Aim of Peribulbar block
L/A agent for peribulbar
Lignocaine- 2%
Bupivacaine- 0.75%
Insertion Joint for peribulbar
1st- medial 2/3 and lateral 1/3 of lower lid
2nd- medial to medial canthus
Peribulbar position of patient
Supine and in primary gaze
Uses of peribulbar block
Cataract
Vitreoretinal surgery
Strabismus
Glaucoma
Keratoplasty
Advantages of peribulbar block
Less chance of globe injury
Less chance of optic nerve damage
Disadvantages of peribulbar block
Pain
Conjunctival chemosis
Less akinesia than retrobulbar block
