Nerve and Joint Blocks Flashcards
What local anesthetics can you use for block tests?
2% carbocaine/lidocaine
Why is 0.5% bupivicaine not used for diagnostics?
Lasts 5-6hr
What volume should you use for perineural anesthesia?
1.5mL
What part of the site is the last to become numb and first to regain sensation?
Skin
What nerves does the palmar digital nerve block block?
Palmar digital nerves
What does an abaxial sesamoid nerve block block?
Palmar digital nerves
What does a low 4-point nerve block block?
Lat/med palmar nerves
Entire foot, coffin joint, deep DDFT, sole, and navicular apparatus all blocked by this nerve block
Palmar digital nerve
Where do you inject for a palmar digital nerve block?
Groove between flexors and ergot while limb is elevated
What might make an lock less effective?
Infection and change in pH
Where do you inject for an abaxial nerve block?
Abaxial border of each proximal sesamoid bone
How much anesthetic do you inject for a low 4 point nerve block?
3mL/palmar carpal nerve
What length needle should you use for a low 4 point nerve block?
5/8” for 4 sites
1.5” for 2 sites
Which block anesthetizes everything from the fetlock distally?
Low 4 point nerve block
Which block anesthetizes the origin of the suspensory ligament?
Lateral palmar nerve block
What block is inserted below the carpus in a groove between the suspensory and DDFT?
High 4 point nerve block
How much anesthetic do you inject for a high 4 point nerve block?
5mL med/lat
Anesthetizes suspensory ligament, some flexor tendons, some MC3/4
High 4 point block
For intra-articular anesthesia, inject volume of anesthetic should be _______ than volume of synovial fluid collected
More than
How many radiographic views need to be done to assess for lameness?
Minimum 4 (2 oblique, 1 lateral, 1 DP)
What modality is the only one that provides real time evaluation of both soft tissue and some bone?
US
What is the purpose of a stand-off gelatin pad?
See superficial structures w/US
Indicated when lameness is localized but not seen w/rads or US, multiple limb lameness, intermittent lameness, or upper limb/pelvic lameness
Nuclear scintigraphy
What is the half life of T99?
6.5hr
How long does the vascular phase of T99 last?
About 2 minutes
Can diagnose remodeling changes of a bone
Nuclear scintigraphy
How do you use local anesthesia to localize a lameness?
Begin distally and work proximally
What is the modality of choice for imaging bone?
CT
Used for evaluation of soft tissues not accessible w/US like foot lesions
MRI
Can be diagnostic as well as therapeutic
Arthroscopy
Wireless, body-mounted inertial sensors can ID and record micromotion of the patient
Equinosis Q w/Lameness Locator
What does Equinosis Q measure?
Peak vertical force of the limb
