What is retrobulbar injection?
Retrobulbar block is type of regional anesthetic nerve block used in intraocular surgery. In this technique, local anesthetic is injected into the retrobulbar space, the area located behind the globe of the eye.
How do you block Peribulbar?
Peribulbar block: the needle is inserted through the fornix below the lateral limbus after the lower fornix was exposed (by pulling the lower lid down gently). Instil one drop of topical anaesthetic eye drops. Insert the needle through the fornix below the lateral limbus.
Which anesthetic is most commonly used for ocular surgery?
Anesthetic Agents Cocaine was the first anesthetic used for ocular anesthesia by Knapp in 1884. Currently, a combination of lidocaine and bupivacaine is reported to be the most popular, as the short acting lidocaine provides immediate anesthesia while bupivacaine provides longer duration of anesthesia.
How long does retrobulbar block last?
Depending on the type of anesthetic used, a retrobulbar block may be short-acting, lasting about 30 minutes, or long-acting, lasting about 6-8 hours.
What is Retrobulbar hemorrhage?
Retrobulbar hemorrhage (RBH) is a rapidly progressive, sight-threatening emergency that results in an accumulation of blood in the retrobulbar space.
How do you do retrobulbar?
Slowly inject 2 to 4 ml of anesthetic and remove needle. With the eye closed apply resistance to the volume injected apply pressure with gauze or (historically) a Honan balloon at 20 to 30 mmHg for 5 minutes to prevent a hemorrhage and increase diffusion of the anesthetic agent. Monitor for retrobulbar hemorrhage.
What is retrobulbar haemorrhage?
What is the difference between retrobulbar and Peribulbar block?
Peribulbar anaesthesia is performed by injecting the anaesthetic drug in the orbit around the equator of the eye ball (globe). Retrobulbar anaesthesia is performed by injecting the anaesthetic drug in the orbit further back behind the eye ball, which is near the nerves that control eye movement and sensation.
How successful is trabeculectomy surgery?
Trabeculectomy is a very delicate operation that requires an operating room, local anesthesia of the eye, an anesthesiologist, and about an hour of operating time. It is successful about 60-80 percent of the time in controlling the eye pressure during a period of five years.
What is Peribulbar and retrobulbar?
What causes a retrobulbar hemorrhage?
A retrobulbar hemorrhage is bleeding that occurs posterior to the orbital septum or globe in sufficient quantity to exert pressure on the globe. It may result from trauma, orbital surgery, and especially the removal of fat during blepharoplasty.
What causes retrobulbar neuritis?
Retrobulbar neuritis can be caused by a variety of conditions, including: Infections such as meningitis, syphilis, and various viral illnesses. Multiple sclerosis. Tumors.