Chapter 23: Med Surg Flashcards Preview

LCCC Nursing > Chapter 23: Med Surg > Flashcards

Flashcards in Chapter 23: Med Surg Deck (68)
Loading flashcards...
1

epidermis

thin, superficial layer of skin; 0.05-0.1 mm thickness and nourished by blood vessels in dermis; regenerates every 28 days

2

melanocytes

contained in deep basal layer (germinativum) of the epidermis; contain melanin (gives skin and hair color) and protects from UV

3

keratinocytes

synthesized from epidermal cells in basal layer, they move to surface of epidermis to die and form corneum (horny cell layer); protective barrier

4

dermis

1-4 mm thickness, 2 layers: papillae forms fingerprints and footprints and reticular layer forms collagen

5

collagen

forms the greatest part of the dermis and responsible for strength; composed of fibroblasts which are important for wound healing

6

subcutaneous tissue

not part of skin, provides insulation, provides shock absorption

7

sebaceous glands

prevent skin and hair from drying; abundant on face, scalp, upper chest, and back, not palms and soles

8

apocrine sweat glands

located in the axillae, breast, tummy, external auditory canals, and eyelids; thick milky substance and become odorous at puberty

9

eccrine sweat glands

widely distributed except on lips; cools the body from evaporation and excretes waste products through the pores of the skin

10

insensible perspiration

600-900 mL/day lost and helps maintain homeostasis through fluid and electrolyte balance

11

gerontologic differences with skin

decreased extracellular water and sebaceous glands, increased capillary fragility which causes bruising, increased melanocytes in basal layer which cause solar lentigines, decreased estrogen causing baldness, increased keratin causing longitudinal ridging of nails

12

actinic keratoses

areas of chronic sun exposure, increased risk for BCC & SCC

13

normal nails

160 degrees

14

intertriginous

skin surfaces overlap and rub on each other

15

primary skin lesions

occur on previously unaltered skin

16

secondary skin lesions

change with time or occur because of factors such as scratching or infection

17

macule

circumscribed, flat discoloration < 0.5 cm: freckles, petechiae

18

papule

elevated solid lesion up to 0.5 cm: wart, BCC

19

vesicle

defined collection of (serous or free fluid up to 0.5 cm: chicken pox, 2nd degree burn

20

plaque

circumscribed, elevated solid lesion formed by confluence of papules: psoriasis and keratoses

21

wheal

firm plaque caused by fluid in dermis: insect bite

22

pustule

circumscribed collection of leukocytes and free (purulent) fluid: acne, impetigo

23

fissure

linear loss of epidermis to dermis: athlete's foot or cracks at corner of mouth

24

scale

excess dead epidermal cells: flaking of skin

25

scar

abnormal formation of connective tissue that replaces normal skin

26

ulcer

irregular, crater-like loss of the epidermis and dermis: pressure ulcer and chancre

27

atrophy

depression in skin resulting from thinning of the epidermis or dermis: aged skin, striae

28

excoriation

epidermis is missing and exposed dermis: abrasion or scratch

29

angioma

benign tumor of blood or lymph vessels: increased with age, liver disease, pregnancy

30

ecchymosis for dark skin

purple to brownish black