Question:
Which nerve blocks are indicated for ocular surgery
A. Auriculopalpebral Nerve block
B. Peterson Nerve block
C. Infraorbital Nerve block
D. Supraorbital Nerve block
E. Retrobulbar Nerve block
Choose the correct answer from the options given below:
Which nerve blocks are indicated for ocular surgery
A. Auriculopalpebral Nerve block
B. Peterson Nerve block
C. Infraorbital Nerve block
D. Supraorbital Nerve block
E. Retrobulbar Nerve block
Choose the correct answer from the options given below:
A. Auriculopalpebral Nerve block
B. Peterson Nerve block
C. Infraorbital Nerve block
D. Supraorbital Nerve block
E. Retrobulbar Nerve block
Choose the correct answer from the options given below:
Show Hint
Remember that the infraorbital nerve (C) is a sensory branch supplying the muzzle and upper teeth. It has no role in ocular surgery, which allows you to exclude options containing C.
Updated On: Aug 13, 2026
- A, B and D only
- A, B, D and E only
- C, D and E only
- A, C and D only
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Ocular surgeries (such as enucleation, ectropion repair, or third eyelid excision) in large and small animals require a combination of sensory blocks to eliminate pain and motor blocks to immobilize the globe and eyelids.
Step 2: Detailed Explanation:
Let us analyze the clinical indications of the listed nerve blocks:
- A. Auriculopalpebral Nerve block: This blocks the motor branch of the facial nerve (CN VII) to the orbicularis oculi muscle, preventing blinking and allowing insertion of speculums. This is indicated for ocular exams and surgeries.
- B. Peterson Nerve block: An injection aimed at the foramen rotundum/orbital fissure to block cranial nerves III, IV, VI, and the ophthalmic/maxillary branches of CN V. It is used in cattle for eye exenteration or enucleation.
- C. Infraorbital Nerve block: This blocks the infraorbital nerve as it exits the infraorbital canal. It is indicated for surgery of the upper lip, nose, and maxillary dental arcade, not the eye.
- D. Supraorbital Nerve block: This blocks the frontal nerve branch of the ophthalmic nerve, desensitizing the upper eyelid. This is indicated for ocular procedures.
- E. Retrobulbar Nerve block: This is an injection behind the globe to anesthetize the sensory and motor structures of the eye, facilitating enucleation. This is indicated for ocular surgery.
Therefore, blocks A, B, D, and E are indicated for ocular procedures.
Step 3: Final Answer:
The correct combination is A, B, D and E only.
Ocular surgeries (such as enucleation, ectropion repair, or third eyelid excision) in large and small animals require a combination of sensory blocks to eliminate pain and motor blocks to immobilize the globe and eyelids.
Step 2: Detailed Explanation:
Let us analyze the clinical indications of the listed nerve blocks:
- A. Auriculopalpebral Nerve block: This blocks the motor branch of the facial nerve (CN VII) to the orbicularis oculi muscle, preventing blinking and allowing insertion of speculums. This is indicated for ocular exams and surgeries.
- B. Peterson Nerve block: An injection aimed at the foramen rotundum/orbital fissure to block cranial nerves III, IV, VI, and the ophthalmic/maxillary branches of CN V. It is used in cattle for eye exenteration or enucleation.
- C. Infraorbital Nerve block: This blocks the infraorbital nerve as it exits the infraorbital canal. It is indicated for surgery of the upper lip, nose, and maxillary dental arcade, not the eye.
- D. Supraorbital Nerve block: This blocks the frontal nerve branch of the ophthalmic nerve, desensitizing the upper eyelid. This is indicated for ocular procedures.
- E. Retrobulbar Nerve block: This is an injection behind the globe to anesthetize the sensory and motor structures of the eye, facilitating enucleation. This is indicated for ocular surgery.
Therefore, blocks A, B, D, and E are indicated for ocular procedures.
Step 3: Final Answer:
The correct combination is A, B, D and E only.
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