What is Subtenon Anaesthesia?
Sub-Tenon’s anaesthesia is provided by first numbing the surface of the eye with local anaesthetic drops, holding the tissue lining (conjunctiva and Tenon’s capsule) in front of the eye with blunt tweezers and making a small nick in it using curved blunt-ended scissors.
What is Subtenon space?
The sub-tenon´s space is a virtual space between the capsule and the sclera. The instillation of local anesthetic into this space produces analgesia and akinesia by diffusing posteriorly into the retro-orbital space to block the traversing sensory and motor nerves.
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.
How do you give a posterior Subtenon injection?
The conventional technique of posterior subtenon injection involves the use of a sharp tipped 26-gauge, 5/8 inch needle that must be inserted up to its hub to obtain adequate placement of the drug into the posterior subtenon space.
Do they paralyze your eye for cataract surgery?
Anesthesia and Medication This is the least risky form of anesthesia and most patients do extremely well with topical anesthesia and some intravenous sedation. Sometimes, medication is injected around the eye socket to numb the eye and paralyze eye and eyelid movement.
What is Subtenon kenalog injection?
Posterior subtenon injection of a steroid is an alternative method with proven effectiveness in various ocular diseases like cystoid macular edema and intermediate uveitis. Posterior subtenon injection of triamcinolone has also been reported to be an effective and safe treatment for diffuse diabetic macular edema.
What medications should be stopped before cataract surgery?
1. MEDICATIONS To minimize the risk of blood loss during your surgery, you must avoid or stop taking medications that contain aspirin, that are anti-inflammatory medications, or contain blood thinning agents. These should be discontinued 7-10 days prior to your surgery.
What is intravitreal route?
Intravitreal administration is done by injecting a drug solution, suspension, or intraocular implants into the vitreous cavity. It is the main route to deliver macromolecules to the posterior segment into the eye. A volume between 20 and100 µL can be injected. Local anesthetic is mandatory with this procedure.
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 do you inject a posterior Subtenon?
Can I take aspirin before cataract?
CAN TAKE ASPIRIN (or Plavix) BEFORE AND AFTER MY SURGERY? Modern cataract surgery rarely causes any bleeding. Topical anesthesia removes the risk of bleeding behind the eye from local anesthetic injections. So, continue your aspirin unless you are specifically instructed to stop.
Do you have to go off blood thinners for cataract surgery?
Blood thinners do not have to be stopped before cataract surgery. Because we are not working on tissues that contain blood vessels, bleeding is usually not a major concern. Patients taking Coumadin, Warfarin, Plavix, Eliquis, Pradaxa, Ibuprofen or Aspirin do NOT generally have to stop these medications.
What does intracameral mean?
adj. within a chamber, such as the anterior or posterior chamber of the eye. In intracameral anaesthesia an anaesthetic agent is injected into the anterior chamber of the eye, usually during surgery.