Exam 2: Digit Amputation Flashcards
What are the 5 potential causes of
sepsis of the distal interphalangeal joint (DIJ)?
Pododermatitis
Peri-articular wound
Interdigital wound
Interdigital necrobacillosis
Solar abscess extension
White line disease
PPIISW
What structures are involved in
Septic DIJ?
P3, P2
Navicular bursa/bone
DDFT/sheath
PIJ (prox. interphalangeal joint)
What might you see on rads of an
animal with septic DIJ?
Periosteal rxn
Asymmetric ST swelling
Bony lysis around joint
What’s your diagnosis if this malleable probe
is placed into the draining tract and
it falls right into the joint space?
Septic DIJ
What are the treatment options for
chronic septic arthritis of the DIJ in cattle?
Facilitated ankylosis (immobilizing a joint by fusing the bones)
Amputation (NOT in horses)
Culling
any surgical procedure that requires opening a joint
Arthrotomy
Immobilizing a joint via fusion of the bones
Facilitated ankylosis
Resection of the _______ and ________
are required in order to perform
facilitated ankylosis
DDFT and Navicular Bone
Anesthesia for distal limb surgery
requires local IV anesthesia and a tourniquet.
How long can you leave on the tourniquet?
Up to 2 hours
A type of peripheral nerve injury;
the mildest form of nerve injury.
It is classified as a transient conduction block of motor or sensory function without nerve degeneration,
although loss of motor function is the most common finding.
Neuropraxia
How do you prevent neuropraxia
during distal limb sx?
Put padding under the tourniquet
What type of tourniquet is used for distal limb sx?
Pneumatic tourniquet
During anesthesia for distal limb sx,
how do you check to see if your block worked?
use HOOF TESTERS
T/F:
With digit amputation, you have a slow return to production,
but the expected production life increases
FALSE!
You have a FAST return to production, but a
DECREASED production life
What are the indications of digit amputation?
Septic coffin joint
P2 or P3 infection or fracture
Injury or sepsis distal to P1
For digit amputation sx, leave as much _____ as possible
in order to provide soft tissue support
bone
If you perform a skin flap procedure during digit amputation,
this is an
Amputation ________ Technique
CLOSED
If you perform digit amputation without a skin flap,
this is an
Amputation ________ Technique
OPEN
For the skin flap procedure/amputation CLOSED technique,
place the bandage ________ removing the tourniquet
BEFORE
What is the average survival time for
animal post digit amputation?
2 years
Some cattle never recover from digit amputation
due to rapid breakdown of supporting structures
such as:
Soft tissue
Cruciate ligaments
Interdigital ligaments
Flexor tendons
Digit amputation is LESS successful on:
_________ digit of the front limb
and
__________ digit of hind limb
due to increased stress on the surviving digit
Digit amputation is LESS successful on:
MEDIAL digit of the front limb
and
LATERAL digit of hind limb
due to increased stress on the surviving digit
There is an ________ relationship
between success of amputation surgery
and increased body weight
inverse
ACUTE septic arthritis of the DIJ is rare
and usually presents _______ weeks
after having intra-articular lavage/antibiotics,
or even systemic abx.
4.4 weeks
(range= 1d - 24w)
This tool is used to create the arthrotomy
during a facilitated ankylosis procedure
Trephine
For a facilitated ankylosis procedure,
after using a trephine to create the arthrotomy,
you must culture the ___________
subchondral bone
For a facilitated ankylosis procedure
after culturing the subchondral bone,
you must remove all infected bone and cartilage
with this tool
Curette
For a facilitated ankylosis procedure,
after removing infected tissue with a curette,
the last and most important step is
LAVAGE!!
For septic arthritis of the COFFIN joint,
the cement block is placed on the
________ digit,
and bandages are placed between flushes
sound digit
Facilitated Ankylosis vs. Amputation:
Which has a higher complication rate
for the lateral hind digit?
Amputation has higher complications for lateral hind digit
Facilitated Ankylosis vs. Amputation:
Which has a decreased production life?
Amputation
Facilitated Ankylosis vs. Amputation:
Which is recommended for heavy animals?
Facilitated Ankylosis
Facilitated Ankylosis vs. Amputation:
Which is recommended for
hind lateral digit sepsis
and
front medial digit sepsis?
Facilitated Ankylosis
