Suture Definitions Flashcards
Breaking Strength
Stress value on the stress strain curve at which suture acutely fails
Capillarity
degree to which absorbed fluid is transferred along a suture. multifilament suture > monofilament suture
Creep
tendency of suture to slowly and permanently deform under constant stress
Elasticity
degree to which suture will deform under stress or load and RETURN to its original form when load is removed
Fluid absorption
degree to which suture will absorb fluid following immersion
Knot pull out strength
Load required to break a suture deformed by a knot.
Deformation caused by knot placement generally results in 10-40% loss of strength
Knot strength
Force necesary to cause a knot to slip
Memory
Tendency for suture to return to its original shape after deformation
Plasticity
Degree to which suture will deform without breaking and will MAINTAIN its shape after removal of the deforming force
Pliability
Ease of handling and the ability to change the shape of suture
Stress relaxation
Ability of suture to reduce stress under constant strain
Suture pull out value
weight required to pull a suture loop from tissue.
Value relates to tissue strength
Fat = 0.2 kg
Muscle = 1.27 kg
Skin = 1.82 kg
Fascia = 3.77 kg
Tensile strength
Similar to ultimate strength, breaking strength, or yield strength. It is a measure of a suture’s ability to resist deformation and breakage and the stress at which deformation (yield strength) or rupture (breaking or ultimate strength) occurs.
