Clinical Skills - Connective Tissue Flashcards
What is the reconstructive ladder
Systematic approach to close a wound, restore function and restore form
Starting with the simplest methods and culminating in the most complex methods
Steps on reconstructive ladder
Dressings - simplest Suture Split thickness skin graft Full thickness Local random pattern flap Predicted flap Free flap - most complex
Skin graft
A piece of skin moved from one part of the body where it is reliant upon the recipient site fir its nutrition
What is harvested in a full thickness graft
The epidermis and whole of the dermis is harvested
Contraction of full thickness skin graft
Less
Healing of full thickness skin grafts
Quicker healing of donor site- great for face and hands
Which areas are full thickness skin grafts used for
Relatively small areas and donor site usually closed primarily
What is harvest in split thickness skin grafts
The epidermis and only upper parts of dermis
What kind of area is cropped for split thickness skin grafts
Large areas
Healing of split thickness skin grafts
Helps by re-epithelialization
Contraction of split thickness skin grafts
More
Skin graft takes
Fibrin adherence Plasma imbibition Inosculation Revascularisation Remodelling
Flap definition
Block of tissue moved from one part of a body to another part of the body where it incorporates its own blood supply for its own nutrition
Anatomy of tendons
Attach muscle to bone
Composed of fibres
Fibres made of fibrils
Surrounded by paratenon
Microstructure of tendons
Fibroblasts arranged in parallel rows (fibrils)
Secrete Type 1 collagen
Sharpey’s fibres
Bone
Sharpey’s fibres
Mineralised fibrocartilage
Effects of age and ageing on tendons
Degeneration
Trauma
Vascular reaction
Degeneration of tendons
Minute tears
Fibrocartiliginous metaplasia
Calcification
‘Critical zones’
Mesenchymal syndrome
Genetic predisposition to tendon degeneration
Trauma of tendons
Often insidious
Can be caused by lifting heavy weights, falls
At autopsy 60% have tears of rotator cuff or Long Head of Biceps tendon
Vascular reaction of tendons
Attempts at repair
Angiogenesis
Causes congestion and pain
Biomechanics of tendons
Strong in tension only
Can sustain tensile strain before failure
Viscoeleastic structures
Viscoelastic structures
Young’s modulus increases with increased rate of force application
Tendon rupture vs avulsion
Depends on speed of injury (rare of strain) - viscoelastic
Fast - tendon ruptures
Slow - bone avulses