Laser Flashcards
What is an insult/injury?
An injury or trauma that causes an inconsistency in the tissue
Any changes on skin (Normal to abnormal)
What are three factors that can lead to abnormal scarring?
- Infection
- Tissue Ischemia
- Picking
What are the five types of wound?
- Contured Wound
- Puncture Wound
- Laceration
- Incision
- Burn
Confused Wound ?
Contused wound: An injury to tissue below the skin
where skin remains unbroken.
Example: Bruise, broken bone.
Puncture Wound ?
Puncture Wound: Injury caused by a sharp or pointed
object, usually collapsed inward,
deep tissue wound.
Example: Stab wound, gunshot wound
Laceration ?
Laceration: Unclean wound with jagged edges, Can be of
varying depths
Example: Cut with metal or can, skinned knee
Incision ?
Incision: Clean cut caused by a sharp instrument.
Example: Surgical wound
Burn ?
Burn: Tissue injury due to excessive heat or acids.
Example: Thermal injury, chemical burn
What are the three types of abnormal scarring?
- Atrophic Scars
- Keloid Scars
- Hypertrophic Scars
Atrophic Scars?
Atrophic Scars:
flat, small, round and generally inverted scars
(acne scars and chicken pox)
Keloid Scars?
Keloid Scars:
scar formation in which tissue response is excessive in
relation to normal tissue repair
(outside the area of injury)
Most common with darker skin types, overproduction of
collagen
Hypertrophic Scars?
Hypertrophic Scars:
Overly developed scar tissue that rises above skin level
and is often overfed by an abundance of capillaries.
List and explain the three phases of wound healing.
- Inflammatory
- Proliferative Phase
- Remodeling Phase
Inflammatory Phase?
Unflammatoey phase:
Occurs within first few hours of injury; area is red, warm, swollen and patient feels pain.
Blood cells inactivate bacteria and tissue cells activate growth factors such as fibroblasts
Its lasts up to 4 days.
• Blood flow and fluids increase at the site
• Blood and tissue cells secrete substances to create inflammation that help overcome
pathogens
•
• Bleeding is controlled (platelets - blood clot)
Proliferative Phase?
Proliferative Phase:
5 days after the initial trauma
Phase of wound healing during which replacement of protective epithelial tissue occurs over the old wound site, scab and scar tissue formed.
This phase lasts from 1 to 6 weeks.
• Type I collagen fibers created by
fibroblasts are being formed across the
wound
Re-epitheliazation occurs over the old wound site, scab and scar tissue formed to induce healing underneath over the next 6 weeks
Remodeling Phase?
Remodeling Phase: Type III collagen formation goes at a furious pace and becomes organized - strength increases.
In certain wounds this could take up to 2 years
What are leukocytes?
White blood cells without granules involved in immune
response. They help the body fight infection and
other diseases. Types of leukocytes are granulocytes,
lymphocytes and Monocytes.
What is Tissue Ischemia?
Localized restriction of blood flow usually caused by an
obstruction of normal circulation.
Can caused by infection, smoking, poor health.
Explain the difference between a partial thickness wound and a full thickness wound.
Partial thickness wound: Epidermis and shallow dermal injury, quicker healing time, Heals
without scarring. Wounds are created from laser and light therapies.
Full thickness wound: penetrates to a specific depth in the papillary dermis or upper
reticular dermis, Slower healing time, Scars develop
Wound shrinks by contraction and re epithelialization occurs across the wound Surgical
incision
Partial Thickness wound?
Partial thickness wound: Epidermis and shallow dermal injury, quicker healing time, Heals
without scarring. Wounds are created from laser and light therapies.
Full Thickness Wound?
Full thickness wound: penetrates to a specific depth in
the papillary dermis or upper reticular dermis, Slower
healing time, Scars develop
Wound shrinks by contraction and re epithelialization
occurs across the wound Surgical incision
Explain what normal scarring looks like.
The result of uncomplicated healing, decolorized and
flat, nearly indistinguishable from the rest of the skin
Epithelialization, the growth of new skin over a wound,
occurs in partial thickness wounds.
What is an example of an Atrophic scar?
flat, small, round and generally inverted scars
acne scars and chicken pox
What is desquamation?
The shedding or peeling of the outer layers of the
epidermis.
For example: When the rash of measles fades,
desquamation occurs.
Skin peeling typically follws healing od a first degree
burn or sunburn.
