Download - Intro to-plastics
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PLASTIC AND RECONSTRUCTIVE SURGERY
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“….the application of anatomical knowledge
to restore form and function…”
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?• Hands• Aesthetics• Microsurgery• Craniomaxillofacial• Burns• Congenital• Trauma and oncology reconstruction
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Anatomy of Circulation
• The blood reaching the skin originates from deep vessels
• These then feed interconnecting perforator vessels which supply the vascular plexus
• Thus skin fundamentally perfused by musculocutaneous or septocutaneous perforators
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Anatomy of Circulation
• The vascular plexuses of the fascia, subcutaneous tissue and skin are divided into 6 layers
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Angiosomes• Similar to a skin dermatome is a composite block of 3
dimensional tissue supplied by a named artery
• Entire skin surface of the body is therefore perfused by a multitude of angiosome units
• First studied by Marchot 1889, expanded by Salmon 1930 and more recently by Ian Taylor
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Taylor GI, Palmer JH. The vascular territories (angiosomes) of the body: experimental study and clinical applications. Br J Plast Surg. 1987;40:113.
• 3D composite of tissue supplied by an artery & draining vein
• Direct perforators are more common in the limbs, whereas indirect perforators predominate in the torso
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SKIN: Physiology & Function
• Epidermis:– protective barrier (against mechanical damage,
microbe invasion, & water loss)– high regenerative capacity– Producer of skin appendages (hair, nails, sweat &
sebaceous glands)
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SKIN: Physiology & Function
• Dermis:– mechanical strength (collagen & elastin)– Barrier to microbe invasion– Sensation (point, temp, pressure, proprioception)– Thermoregulation (vasomotor activity of blood
vessels and sweat gland activity)
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Reconstructive ladder
• Primary closure
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Simple closure
• Best result• No tension• Technique
dependent• Sutures• Staples, Tape,
Adhesive
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Reconstructive ladder
• Primary closure• Delayed primary closure
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Reconstructive ladder
• Primary closure• Delayed primary closure• Secondary intention
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Reconstructive ladder
• Primary closure• Delayed primary closure• Secondary intention• Graft– Transfer of tissue with no intrinsic blood supply
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Graft• Layers of the skin• Split vs Full• Other grafts–Bone– Tendon–Nerve–Composite
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Skin Grafts: Classification
• Full thickness skin grafts:- epidermis & full thickness of dermis
• Split skin graft: - epidermis & a variable proportion of dermis- thin, intermediate or thick
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Split skin graft
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What is a Flap?
• 16th century Dutch word “flappe”– ….something that hangs broad and loose ,
fastened only by one side..”
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What is a Flap?
• A flap is a unit of tissue that may be transferred from a donor to a recipient site while maintaining its blood supply.– Flaps can be characterized by their component parts
• cutaneous, musculocutaneous, osseocutaneous
– Their relationship to the defect • local, regional, or distant
– Nature of the blood supply• random versus axial
– The movement placed on the flap • advancement, pivot, transposition, free, pedicled
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Mathes & Nahai 1981Muscle Flap Classification
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Fasciocutaneous flapsCormack & Lamberty (BJPS 1984)
• Type A – multiple perforators in the flap base– no discrete origin– may be combination of direct or indirect
perforators• Type B – pedicle or free flap based on a single
perforator• Type C – multiple segmental perforators from
the same vessel
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Nahai-Mathes Classification
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Reconstructive ladder
• Primary closure• Delayed primary closure• Secondary intention• Graft– Transfer of tissue with no intrinsic blood supply
• Flap– Transfer of tissue with intact blood supply
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Flaps• Simple or random patterned –based on movement (advancement,
rotation, transposition• Complex - named anatomic blood supply• Local vs distant• Pedicled vs Free (microvascular)
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