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Graft - Coggle Diagram
Graft
Shapes
Sheets
Postage stamp
Cutting small areas and applying it over bare area to allow escape of exudate
Fixation by epithelization
Indicated in limited donor site (Extensive burns)
Mesh graft
Expand size og graft
Indicated in extensive burns
Tissue mincer
Tissue culture
1 cm2 cultured for 20 days
results are not goof
coverage large areas
Unrelated donor loses its antigenicity
Anatomy
Dermis
Rich in blood supply
2 sublayer
Papillary
Reticular
Hypodermis
Epidermis
no blood supply
depends on diffusion
consist of 5 layers
Separated from dermis by basement membrane
Classification
Source
Autograft
Same individual
Allograft
one human to another
Isograft
From one twins to another
Heterograft / Xenograft
One species to another
Thickness
Thin split graft
adv
Best survival
heals rapidly
dis
Least resemble origional skin
Least resisitance
Poor sensation
Maximal 2ry contraction
Thick split graft
Adv
increase quality
Less contraction
Looks better
Fair sensation
Dis
lower survival
Slower healing
full thickness
adv
Most resemble normal skin
Minimal 2ry contraction
resistant to trauma
Good sensation
Good looks
dis
Poorest survival
Donor surgery
Limited donor site
compounents
Lipodermal
Skin + cartilage
Mucous membrane + cartilage
Composite hair graft
Indications
Covering loss of skin
Trauma Tumor Burns Bites Infection Injuries Scars Ulcer Bed sores
Correction of condition
Contractures
Congenital anomalies
Reconstruction of lost part
when other procedures are inadequate
Factors affecting graft take in survival
Optimal health grannulation tissue
optimal Graft bed
Thickenss of graft
General condition of the patient
Donor area
Split thickness
Thigh / trunk / Flexor aspect of arm
Full thickness
Pre auricular / post auricualr / supra clavicular / abd skin upper eye lid
Harvesting tools
Full
Scalpel
Split
Grafting knife
Electric dematome
most common used
Manual drum dermatome
For harvesting large sheets
Definition
Tissue epidermis and variable part of demis is completly separated from donor site and blood supply