Flashcards in Tendonitis And Tendon Laceration Deck (54)
Where does the SDF tendon insert?
Divides at P1 and inserts primarily on P2
Where does the DDF tendon insert?
Where does the suspensory ligament originate and insert ?
Originates from proximal MC/MT III
Insert on seasamoid bones
Extensor branch of seasmoid ligament joints common digital extensor tendon
What is the purpose of the endotendon?
Provides intrinsic blood supply
Has nerves, growth factors, and provides elasticity
What is the epitenon ?
Contiguous with endotendon, surrounds tendon
What is the paratenon?
Surrounds tendons NOT in a sheath
Reduces frictional forces, supplies blood vessels, repair elements
What do you call the stain able to be exerted on a tendon that it goes from crip pattern to straight?
The toe region (crimp to straight) allows the tendon to extend by ___%
How much is a tendon stretched during a walk?
How much is a tendon extended at a trot ?
How much is a tendon extended at a gallop?
How much can a tendon extend before rupture?
Scar tissue formation starts out with type ____ collagen and remodels over time to induce more type ___ collagen
T/F: tendons enclosed in a tendon sheath have better healing than those not enclosed
Tendons in a tendon sheath have less efficient healing
What is tendonitis?
Inflammation of a tendon
Most commonly from overused, but can be from infection/injury
What are the 2 mechanisms of overstrain?
Repetitive microtrauma (most common) —> molecular degeneration with progressively weakens tendon
Percutaneous trauma can clean to serious damage to the palmar aspect of the pastern/metacarpus. Extensor tendon lacerations rarely have long term consequences through, why?
Extensor tendons are non necessary for weight bearing in the horse
Why tendons are most prone to tendonitis/desmitis?
SDFT and SL
Take the most load during heel strike (landing)
Where do tears in the synovial cavities most commonly occur?
DDFT of forelimb
Manica flexoria of hindlimb
What are predisposing factors for tendonitis?
Anything increasing stress on the tendon/ligament
Inadequate training —>muscle fatigue
Poor confirmation —> long sloping pastern
Poor hoof care —> long toes or underrun heels
What can you often find on PE of a horse with tendonitis?
Bowing of the palmar contour of the limb
Inflammation (heat, pain, swelling, lameness)
Severe lameness initially but once inflammatory phase has passed (1-2weeks) lameness resolves rapidly
Altered angles of limbs
What is the BEST tool for diagnosis of tendonitis?
See hypogenic areas in the tendons if there is damage
When is the best time to do an ultrasound for tendonitis?
One week after injury
—> allows injury to fully declare itself
—> time for inflammatory process to decrease and better visualization
What type of US probe do you use to visualize tendonitis?
Linear 7.5-12MHz transducer
Evaluate transverse and longitudinal planes and both limbs
When doing US of the palmar aspect of the cannon bone, what structures are you visualizing from superficial to deep?
SDF, DDF check ligament, suspensory ligament
What tendons are you visualizing from superfiical to deep when doing US at the level of the fetlock?
SDF, DDF, seasmoid ligament
How does acute injury of a tendon appear on US?
Margin or position changes
How does a chronic tendon injury appear on ultrasound?
Variable enlargement and echogenicity
Irregular situated pattern — > fibrosis
What method of imaging can be used for a suspected tendon injury that cannot be found on ultrasound?