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The retrobulbar block is performed with the patient either seated or supine and looking straight ahead. The head should be maintained in a neutral position. A needle (22–27 Gauge, 3 cm long) is inserted at the inferolateral border of the bony orbit and directed straight back until it has passed the equator of the globe.
Pain at the injection site may occur if O' Brien's block is applied. [3] Atkinson's block : The superior branch of the facial nerve is blocked by injecting the anaesthetic solution at the inferior margin of zygomatic bone. Nadbath block : In Nadbath block, the facial nerve is blocked at the stylomastoid foramen. The patient is likely to ...
Anaesthesia may be placed topically as eyedrops or injected next to (peribulbar) or behind (retrobulbar) the eye [6] or sub-tenons. Local anaesthetic nerve blocking has been recommended to facilitate surgery. [2] Topical anaesthetics may be used at the same time as an intracameral lidocaine injection to reduce pain during the operation. [6]
This outpatient procedure was most commonly performed under monitored anesthesia care using a retrobulbar block or peribulbar block or a combination of topical and subtenon (Tenon's capsule) anesthesia. Due to the higher risks associated with bulbar blocks, topical analgesia with mild sedation is becoming more common.
Topical, sub-tenon, peribulbar, or retrobulbar local anaesthesia is generally used, usually causing little or no discomfort. [52] [49] Injections may be used to block regional nerves and prevent eye movement. [7] Topical anaesthetics are most commonly used, placed on the globe of the eye as eyedrops (before surgery), or in the globe (during ...
Retrobulbar block; S. Sciatic nerve block; Spinal anaesthesia; T. Transverse abdominis plane block; U. Ultrasound-guided peripheral nerve block This page was ...
Many local anesthetics fall into two general chemical classes, amino esters (top) and amino amides (bottom). A local anesthetic (LA) is a medication that causes absence of all sensation (including pain) in a specific body part without loss of consciousness, [1] providing local anesthesia, as opposed to a general anesthetic, which eliminates all sensation in the entire body and causes ...
This method of surgery decreased the need for an extended hospital stay and made out-patient surgery the standard. Patients who undergo phacoemulsification rarely complain of pain or discomfort, although those who have topical anaesthesia rather than peribulbar block anaesthesia may experience some discomfort during the procedure. [48]