Tendinitis Flashcards
Definition of tendinitis
Inflammation of a tendon
What is a tendon
-Dense collagen fiber that connect muscle to bone
-Part of the musculotendinous unit
2 types of tendons
-Paratendon
-Sheath
A paratendon surrounds
-A tendon that moves in a straight line
-Cord like
Tendon sheath surrounds
-Tendons that run across a bony prominence- filled with synovial fluid (bursa)
-Sheet like (aponeuroses)
Blood supply to paratendon
Blood vessels coiled in aveolar tissue-> vascularized
Blood supply to tendon sheath
-Blood supply compromised when tendon is exposed to compression, friction, torsion-> avascular
-Limited blood supply from mm to bone
Strength of tendon sheath
Have great tensil strength
What happens when placing load on tendon sheath
It will straighten out, collagen fibers will deform->accounts for 4% of tendon lengthening
What happens if a tendon sheath lengthens past 4%
Tendon will return to normal length
What happens if a tendon sheath lengths past 8%
Collagen links begin to fail-> causing microtearing, partial tearing, even complete rupture
Cause of tendinitis
Chronic overload of tendon
Contributing factors of tendinitis
-Muscle imbalance
-Poor Biomechanics
-Lack of flexibility
-Chronic degenerative changes in tendon
-Poor blood supply to tendon
Tendinitis due to
Microtearing of tendon fasicles do to overloading of tendon-> result in inflammation
Grade 1 tendinitis
Pain after activity only