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Retro/Peribulbar blocks, Regional Exam 2*
Terms in this set (12)
What block provides motor paralysis to the eye, however, this block has no effect on the superior oblique muscle?
What three nerves does the Retrobulbar block effect?
What block is the retrobulbar block combined with to block the orbicularis oculi?
Facial Nerve block
What block requires a pt to look up and in, use of a 25 gauge, 40mm needle, the needle is directed toward the apex of the muscle cone and advanced 25mm, with an injection of 2ml LA?
What does the up and in gaze of the Retrobulbar block put the Pt at increased risk for?
Optic Nerve injury
What does the superomedial approach to a retrobulbar block increase a Pts risk for? What does it decrease a Pts risk for?
1. Globe injury
2. Optic Nerve injury
What are some of the complications associated with the retrobulbar block?
1. Optic Nerve damage
2. Globe damage
3. CNS toxicity
4. Retinal detachment
6. Occulocadiac Reflex
What is the most common side effect you need to be prepared for when doing a retrobulbar block?
What is the major benefit of the peribulbar block? What nerve is blocked?
1. The muscle cone is not entered
2. Facial Nerve around the eye
Is more or less LA volume required for a Peribulbar block? How many mL of LA is used?
1. More volume
2. 8-12 ml
Is the failure rate higher or lower with a Peribulbar block compared to a Retrobulbar block?
Higher Failure rate with the Peribulbar block
Does a Retrobulbar or Peribulbar block have a faster onset?
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