Locoregional Anesthesia for LA

Question 1

Which nerve block in equine causes paralysis of orbicularis oculi muscle preventing blinking during ophthalmic exam?

Answer 1

Auriculopalpebral n. block

Question 2

T/F: Auriculopalpebral n. block provides sensory and motor block

Answer 2

FALSE- Motor only

Question 3

What nerve block is used for placement of sub-palpebral lavage catheter?

Answer 3

Supraorbital n. block- sensory and motor block

Question 4

What nerve block is used for enucleation sx in equine?

Answer 4

Retrobulbar n. block

Question 5

What are the two dental nerve blocks in equine?

Answer 5

Infraorbital n. block and mental n. block

Question 6

What does the infraorbital n. block desensitize?

Answer 6

Upper lip and nose (at exit of infraorbital canal)

Teeth rostral to 1st molar, maxillary sinus, roof of nasal cavity (in the infraorbital canal)

Question 7

What does the mental n. block desensitize?

Answer 7

Lower lip

Question 8

Why is it important that caudal epidurals are used in equine?

Answer 8

We don’t want to lose hindlimb motor function

Question 9

How much lidocaine is adequate for anus, perineum, rectum, vulva, vagina, urethra and bladder area.

Answer 9

2% 6-8 mL

Question 10

What drug is commonly used in equine epidural for local analgesia and systemic alpha-2 effects?

Answer 10

Xylazine, detomidine

Question 11

What combination of drugs provides excellent analgesia for hindlimb pain in equine?

Answer 11

Detomidine and morphine

Question 12

T/F: You can use local anesthetics in an epidural catheter

Answer 12

FALSE. YOu can’t use this due to the risk of motor block

Question 13

When using lidocaine for castration, how do you know that the drugs are working?

Answer 13

The testicle should feel firm after injection

Question 14

What block causes paralysis of orbicularis oculi muscle providing motor block only?

Answer 14

Auriculopalpebral nerve block

Question 15

What nerve block minimizes edema, hematoma and other incision complications in cattle?

Answer 15

Inverted L block

Question 16

Where does the proximal paravertebral throacolumbar nerve block work?

Answer 16

Dorsal and ventral branches of T13, L1 and L2 spinal nerves

Question 17

What are signs of proximal paravertebral throacolumbar nerve block taking effect?

Answer 17

Absent reaction to skin prick, increased skin temperature and spinal scoliosis towards desensitized side

Question 18

What are the advantages of the distal paravertebral throacolumbar nerve block over the proximal paravertebral throacolumbar nerve block?

Answer 18

Lack of scoliosis and less risk of penetrating major blood vessels

Question 19

What is a common nerve block done on the teat?

Answer 19

Ring block-treat laceration and other injuries