Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
What is a wound |
Wound is the result in the disruption of normal anatomical structure and function of a tissue |
|
|
Causes |
Biological Radiant energy Chemical Immunological |
|
|
Classification |
Clean GI and GU not entered Clean contaminated: Uninfected wound in which no inflammation is encountered gi gu resp have been entered Contaminated: Gross contamination present at site without active infection Dirty: traumatic wounds containing dead tissue and wounds with evidence of a clinical infection purulent drainage |
|
|
Biological types of wound healing |
Resolution Regeneration Repair |
|
|
Healing by intention |
Primary Secondary Third intention |
|
|
Stages of wound healing |
Preparatory phase(no tensile strength) Proliferative phase: Re epithelialization and granulation tissue formation, angiogenesis, wound contraction Maturational: Matrix and collagen remodelling |
|
|
Tensile strength |
1st phase less than 6 days: wound bridged only by epithelium tissue strength depends on suture material 2nd phase: sharp increase to peak rate on 14 to 15th day corresponding to progress of fibroblast 3rd phase peaks 6 weeks, slower pace then for years 50% preinjury level at 3 years |
|
|
Factors affecting wound healing |
Local: Infection, Mechanical, Foreign body, Radiation, Blood supply Systemic: Nutritional status VIT A(revereses delayed wound healing from steroids) Vit C: collagen synthesis Vit E: stabilizes cell. membrane Zinc: Cofactor for many enzymes defeciency causes impaired epithelial and fibroblast proliferation Smoking Steroids Age Metabolic diseases |
|
|
Complications of wound healing |
Infection Hypertrophic scar Keloid formation Hyoerpigmentation Implantation cyst Weak scar Cicatrization Neoplasia |
|
|
Ideal. material for suturing |
Completely inert presence excites very little or no reaction from tissues of wound Does not affect the tensile strength of wound |
|
|
Suture materials |
Monofilaments better than multifilaments |
|
|
Absorbable sutures |
Catgut from serosal layer of cattle or submucosa of sheep |
|
|
Non absorbable |
Silk and cotton Monofilament nylon(maintains tensile strength indefinitely) |
|
|
What is a hematoma |
Localised collection of blood after blunt trauma or surgery maybe subcut, intramuscular, subfascial, intra articular can form abscess if large thus should be drained |
