DIR Text Flashcards
Sensory innervation of face
What are the layers of the scalp?
What is the “forgotten” branch of CN VII?
Where is the spinal accessory nerve (CN XI) located in relation to Erb’s point?
What is the eponychium?
Cuticle
Esters may cross-react with what?
STPP
Sulfa, thiazides, para-aminobenzoic acid, and para-phenylenediamine
On administration of anesthesia, loss of sensation or function occurs in what order?
Type ____ collagen is the first collagen to be synthesized in a wound.
Type III collagen
THEN type I collagen
Contraction of wound mediated by myofibroblasts is greatest from _____ to _____ days.
5-15 days
Name the flap
What kind of flap is this?
Rieger flap
Also known as dorsal nasal rotation flap
Random pattern, rotation flap
How much of an increase in total scar length occurs in a 60-degree Z-plasty?
Name the flap
Melolabial interpolation flap
Take down occurs at 3 weeks
Random-patterned flap with blood supply from perforators of the angular artery
Name the flap
Name the flap
Mastoid or retroauricular interpolation flap
Why should hypergranulation tissue be removed?
If left in place, this tissue will serve as a physical barrier to epidermal migration. It may be removed mechanically with a curette and chemically with agents such as silver nitrate and trichloroacetic acid
What are strategies for avoiding trap door deformity?
Hypothesized to be caused by insufficient undermining
Best prevention is at time of repair
Widely undermine
Placement of basting sutures
Squaring of corners
May be treated with ILK
Wound contraction is maximal approximately _____ after reepithelialization has occurred. Scar relaxation occurs _____ postoperatively and will lessen the final degree of contracture.
Wound contraction is maximal approximately 2 months after reepithelialization has occurred. Scar relaxation occurs 3 months to 1 year postoperatively and will lessen the final degree of contracture.
What are the histologic findings of electrodessication and electrofulguration?
Tissue desiccation: Cell outlines preserved but shrunken. Nuclei elongated. Some vessel thrombosis
What are the histologic findings of electrocoagulation?
Tissue coagulation: Cell outlines lost from massive protein denaturation. Homogeneous hyalinized appearance. Vessel thrombosis
What are the histologic findings of electrosection?
Cell disintegration forming approximately 0.1-mm incision; minimal coagulation effect
What are the histologic fingings of electrocautery?
Amorphous tissue with charred foci and formation of steam spaces
What is the boiling point of CO2 gas?
-78 degrees Celsius
Peak plasma lidocaine levels are reached how many hours after tumescent anesthesia?
12 hours
In PDT, what is the porphyrin responsible for treatment response?
Protoporphyrin IX
Photosensitizer metabolized in the skin to photoactive protoporphyrin IX
Is salicylic acid an alpha- or beta-hydroxy acid?
Beta-hydroxy acid
Self-neutralizing
Oil soluble
Name the alpha hydroxy acids?
Three categories: Monocarboxylic (glycolic, lactic,mandelic), dicarboxylic (malic, tartaric), tricarboxylic (citric)
Water-soluble
True or false:
SPF does not measure UVA protection
True
SPF is only a measure of UVB
