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BVMS2 OSCES > Equine Nerve Block > Flashcards

Equine Nerve Block Flashcards

1
Q

What are equine nerve blocks used for

A

Diagnostic tool to identify lameness in the limb

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2
Q

When should equine nerve blocks NOT be performed

A

When there is a potential fracture of the limb

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3
Q

What is the antibiotic of choice when performing an equine nerve block

A

Mepivacaine (lasts 90-120mins)

Lidocaine can be used but only lasts 30-45mins

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4
Q

What is the correct length and gauge for distal equine nerve blocks

A

25g
5/8”

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5
Q

How do you prepare for equine nerve blocks

A

Clip excess hair
Obtain consent!
Clean skin - chlorohexadine
Clean injection site with alcohol

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6
Q

In what order should you complete equine distal nerve blocks

A

Distal to proximal

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7
Q

If blood appears in the hub of the syringe after inserting the needle while performing an equine distal limb nerve block, what should you do?

A

Redirect the needle axially

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8
Q

What are the 3 distal equine nerve blocks

A

Palmar digital nerve block
Abaxial sesamoid nerve block
Palmar and palmar metacarpal nerve block

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9
Q

How should horse stand for Palmar Digital NB

A

Non-weight bearing

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10
Q

Where should needles be positioned for a palmar digital NB

A

Palpate neurovascular bundle - draw thumb over palmerolateral and palmeromedial aspect of pastern. Nerve is most axial structure.
Insert needle slightly medial and distal subcutaneously

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11
Q

How much mepivacaine should be used during PD NB

A

1-1.5ml

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12
Q

What position should horse stand for an abaxial sesamoid NB

A

Non-weight bearing

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13
Q

Where should needles be positioned for an abaxial sesamoid NB

A

Palpate depression in base of proximal sesamoids
Palpate neurovascular bundle approximately 1cm above the depression and slightly abaxial.
Insert needle axial subcutaneously

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14
Q

Which region does a PD NB desensitise

A

Foot - sole, distal intepharangeal joint, navicular bursa

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15
Q

Which region does a AS NB desensitise

A

Limb distal to fetlock
Occasionally fetlock

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16
Q

How much mepivacaine should be used in an abaxial sesamoid NB

A

2-2.5ml

17
Q

How should a horse stand for palmar and palmar metacarpal NB

A

Weight bearing

18
Q

How do you place needle for palmar NB

A

Palpate gap between deep digital flexor tendon and suspensory ligament
Insert needle mid - distal 1/3 cannon @90 degree angle into gap
On either side

19
Q

How should you place a needle for palmar metacarpal nerve block

A

Palpate “button” at distal splint bone
Insert needle distal to button subcutaneously

20
Q

How much mepivacaine should be used for each site of palmar and palmar metacarpal NB

A

1-2ml

21
Q

Which regions do palmar and palmar metacarpal NB desensitise

A

Entire digit up to and including the fetlock

22
Q

How can foot pain be detected in horses

A

Hoof testers

BVMS2 OSCES (3 decks)

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