General Notes on Tissue Healing

1. General Notes on Tissue Healing

2. Skin Healing

5. Dermis - .5 mm to 3 mm thick dermal papillae helps hold epidermis in place (ridges - finger prints) dermis has smooth muscle tissue (pilo erector) bundled with hair follicles �goose bumps� Langers lines - lines formed at right angles to direction of natural stretch caused by gravity & activity (collagen fiber direction) incisions along these lines tend to form less scar tissue substantial plastic surgury implications Hypodermis - Subcutaneous tissue: adipose and areolar tissue density & cellular arrangement of this tissue determines skin �mobility� composed Skin

14. Classification of Muscle Injury Muscle Strain First degree (mild) � �Strained Muscle� minimal structural damage and minimal hemorrhage Second degree (moderate) � �Pulled Muscle� partial tissue tear, significant loss of function, significant hemorrhage Third degree (severe) � �Torn Muscle� complete tear, total loss of function, extensive hemorrhage

16. Classification of Muscle Injury Compartment syndrome: hemorrhage r u pressure in muscle unit u pressure r d blood flow r ischemia r necrosis r gangrene Most often result from severe intramuscular contusions Can be caused by excessive exercise induced muscle damage causes severe pain, palpable tightness, �shiny� skin appearance fascial release (surgery) is done within 12 hrs to minimize damage