Midterm #1 Flashcards
Layers of the skin
Outer Epidermis & Stratus Corneum (hair/sebaceous glands/sweat glands pass through this layer but originate in dermis)
Dermis (contains capillary network)
Subcutaneous Tissue
5 Functions of the skin
Protection Thermoregulation Elimination of wastes Synthesis of Vit.D Sesnation/communication
Risk factors affecting skin
Age Dryness Nutrition/Hydration Disease Environment
Age related changes in the skin
Increased dryness Decreased sebum Epidermal thinness Loss of elasticity Decreased tissue tolerance
What is pressure?
Interventions for pressure.
Direct force on an area
Interventions: "offloading" Turn Q2h Position bed at 30 degrees Pillows between bony prominence's
What is friction?
Where does damage occur?
Rubbing of one surface against another
Skin damage occurs to epidermal/upper dermal layers
Elbows/heels at greater risk
Looks like a blister or an abrasion
What is shearing?
Where does damage occur?
Underlying bones and soft tissues above them move in opposite directions
Damage occurs at deep fascia level over-top bony areas
How does moisture cause skin breakdown?
Interventions?
Interferes with the process of wound healing
Decreases the resiliency of the epidermis to external forces.
Interventions:
Use moisture barrier/absorbent pads
Keep moist skin surfaces apart
Do NOT use Telfa
How does protein promote healing?
Used to build new tissue
Makes skin strong to prevent trauma
Prevents infection
How does Zinc help with healing?
Builds & binds tissue to give it strength
Helps fight infection
How do carbohydrates aid healing?
Source of energy for body & collagen formation
Prevents protein from being used as source of energy
How do fats aid healing?
Source of energy for the body
Helps absorb vitamins
How do fluids aid healing?
Prevents dehydration by replacing the fluid lost in wound drainage
Maintains adequate circulation of blood and nutrients to the wound
Vits A/C role in wound healing
Promotes strength
Helps fight infection
Interventions for dry skin
skin cleanser with pH 4-7 Liquid soap vs bar no rinse cleanser daily moisturizing protect skin with barrier ointment promote nutrition/hydration
How can wounds be classified?
according to cause: abrasion incision laceration open incision contusion penetrating puncture septic etc.
Difference between acute and chronic wounds.
Healability? Host?
Acute: heal within 12 weeks, usually a health host
Chronic: will take longer than 12 weeks - usually months to years, usually underlying conditions & may never heal if underlying pathology never corrected.
What does wound healing depend on?
Type of damage done, and type of tissue damaged
Phases of wound healing
1) Hemostasis
2) Inflammation
3) Proliferation
4) Remodeling/maturation
Hemostasis
Day 0
clotting cascade initiated in response to stem blood loss
Inflammation
Day 0-4
characterized by heat, swelling, redness, pain, loss of function at wound site
Proliferation
Day 4-21
involves granulation/angiogenesis/epithelialization
quick phase when no infection present
Proliferation– Granulation
Day 3-14
granulation tissue forms: combo of fibroblasts/inflammatory cells/new capillaries/fibronectin/hyularonic acid
Proliferation – Angiogenesis
new blood vessels form from pre-existing vessels
Collagen increases from day 3 to 3 months
Fibroplasia occurs parallel to revascularization
Endothelial cells migrate forming capillary buds then loops
3 types of healing
Primary: healing from internal layers outwards, wound held together
Secondary: healing from wound base/walls up, open wound
Delayed primary: pt. given antibiotics if high risk of infection which delays healing
8 considerations when assessing wound
- braden scale
- holistic approach
- patient hx/medications
- cause of wound
- duration of wound (acute/chronic)
- healability (goal of wound)
- multidisciplinary approach
- accessibility of wound care products
Braden scale- risk assessment
6 subscales
sensory perception activity mobility moisture nutrition friction & shear
How to determine wound goal
Is it healable or non-healable?
Healable: good blood supply, healthy host
Non-healable: poor blood supply, unhealty host
Complete vascular assessments such as ABPI
What to do if wound non-healable
Treat as palliative wound: pain management, prevent infection, manage odour
Types of wound classifications
partial thickness: epidermis & parts of dermis, superficial & painful, healing by regeneration
full thickness: epiderms & dermis destroyed, damage to underlying structurs, heal by granulation, loss of normal function
How do wounds impact the cost of health care
Increased: nursing care hospital time supplies/equipment sepsis mortality
National pressure ulcer advisory panel stages (NPAUP)
Stage 1 Stage 2 Stage 3 Stage 4 Unstageable
Stage 1
Non-blanchable erythema (redness)
Area may be painful/firm/soft/warm/cool compared to surrounding areas
Difficult to detect in individuals with dark skin tones
“at risk” persons
Stage 2
Partial thickness - through epidermis and into dermis
Shallow crater with pink wound bed- no slough
May have serum-filled blister
This category should not be used to describe skin tears, tape burns, incontinence associated dermatitis, maceration or excoriation.
Stage 3
Full thickness- through epidermis/dermis and into subcutaneous tissue
May extend down to but not through underlying fascia (bone/tendon/muscle)
Slough, undermining, tunneling may be present
Stage 4
Full thickness with exposed bone/tendon/muscle
Eschar (leathery, grey, hard to touch)
Slough, undermining, tunneling
Infection may be present
Unstageable
Full thickness – depth unknown because unable to visualize full extent of damage d/t slough & eschar in wound bed
slough/eschar needs to be removed to expose base of wound
Infection may be present
Difference between contamination and infection
Contamination: presence of non-replication bacteria which does not effect wound healing
Colonization: presence of replicating bacteria, but do not effect wound healing
Critical colonization (aka local infection): wound has stopped healing d/t bioburden but may not show S&S of infection
Infection: when microorganisms invade tissue and triggers host response
wound infection equation
virulence x # of microorganisms/ host resistance
3 types of inflammatory responses
acute: dramatic
chronic: prolongs– damaging to host
stunned wound: dormant– little or no response after trying multiple products
S&S of infected CHRONIC wound
delayed healing increased exudate foul odour new areas of slough/breakdown bright red tissue undermining/bridging probe to bone
wound assessment
location
measurements (cms, done weekly)
under-mining/tunnelling/sinus tract
base of wound (reveals health status)
granulation tissue
exudate (amount, colour, consistency, odour)
odour
periwound (erythema, maceration, induration)
edema (generalized, localized, pitting/non-pitting)
pain
When does undermining occur?
with pressure ulcers & is complicated by shearing
3 types of wound pain
non-cyclic acute wound pain: e.g. debridement
cyclic acute wound pain: e.g. daily dressing changes/turning/positioning/mobilization
chronic wound pain: persistent, no apparent mediating factors
interventions for non-healing wound
- consider other factors such as infection/inadequate nutrition, trauma, pathology
- educate
9 principles of wound management
1) risk assessment
2) wound assessment
3) debridement
4) identify & eliminate infection
5) eliminate dead space
6) absorb extra exudate
7) promote moist wound healing
8) thermal insulation
9) protect healing wound and surrounding skin
types of debridement
surgical/sharp
chemical
mechanical
autolytic
Autolytic debridement
type of dressings?
inflammatory response
use of WBC’s/enzymes
use dressings that donate/maintain moisture
Mechanical debridement
type of dressings?
Irrigate the wound bed
Wet to dry dressings
Surgical & sharp debridement
Pt. under local or general anesthesia
aggressive tx
sharp debridement: removal of loosely adherent, non-viable tissue with sterile scissors or scapel
Sterile
Chemical/enzymatic debridement examples
Biotherapy (maggots)
Dakin’s solution (bleach and chlorine)
how are dressings selected
based on 9 prinicples of wound-care
the goal of the wound (healibility)
the form & function of the dressing
**moisture-> if it’s dry add moisture, if it’s wet manage moisture
Examples of dressing forms
hydrogels foams absorbents anti-microbials negative pressure therapy treatment cream skin barriers
5 common functions of dressings
absorbent to add/retain moisture antimicrobial barrier non-adherent
skin prep purpose?
to protect peri-wound skin from maceration/tape tears
skin barrier ointment purpose?
to protect perio-wound skin from maceration
When would moisture management be contraindictated
based on healability (if non-healing wound may result in maceration??)
What is the moisture vapor transmission rate?
aka?
when a dressing is <840g/m squared per 24h
aka moisture retentive dressings
moisture retentive dressing purpose
acts as an exogenous barrier for water vapor loss from a wound when stratum corneum not intact
purpose of hydrogels
for dry wounds when healability determined
purpose of transparent film dressings
for minor abrasions & friction (not for skin tears/blisters)
purpose of hydrocolloids
stage II or partial thickness wounds with minimal exudate
Purpose of foams
for small-moderate drainage on wound with/without border
purpose of absorbents
for moderate-large amount of drainage
purpose of absorbent antimicrobial dressings
for critically colonized/infected wounds or for prevention of infected wounds
purpose of anti-microbial/ odour control dressings
for infection and for odour control
purpose of non-adherents
for fragile wound bases e.g. skin tears
purpose of composites
e.g. all dress: for lightly exudating wounds
dressing of choice over hydrogels
purpose of antiseptic poviodine
antimicrobial protection
to stabilize/maintain non-healable wounds
Protease modulating matrix dressings
e.g. promogran
collagen matrix dressing that attracts cells & supports tissue growth
transforms into soft gel on wound bed
used for foot ulcers, venous&pressure ulcers etc.
4 concepts that impact our ability to transition?
vulnerability
powerlessness
empowerment
resilience
What is vulnerability?
“to wound” (latin)
capable of being physically or emotionally wounded
what increases vulnerability?
the longer the exposure to any kind of risk –> the more vulnerable
e.g. aboriginals, women, mental health illness (astigmatism), teen pregnancy ETC.
Predisposing factors for vulnerability
- Very old/very young ages
- Lower socioeconomic status
- Developmental transitions (chronicity, dependency, social isolation)
- Multiple chronic illnesses
- Undergoing crises (disease/violence/gender worldwide)
- Language
- Level of education
Impact of vulnerability on HC
- Increases costs
- Increases workload/demand
- High complexity of care (mental as well as physical)
- Holistic approach
What are the 6 dimensions of vulnerability?
- limited control (e.g. HC- not being able to provide care to everyone we want to)
- victimization (feeling blamed for situations outside of control)
- disenfranchisement (feeling separated from mainstream/majority e.g. women voting)
- disadvantaged status (no social support)
- powerlessness (no control/choice)
- health risk (family situation, health history, baseline, violence, childhood risk factors*)
LVD-PHD
Assessing for RISK in the vulnerable..
What to assess?
Family situation
Childhood risks
Youth at risk
Violence
Delinquent behaviour
Suicidal behaviour
Coping mechanisms
What is the cycle of vulnerability?
predisposing factors
no effective intervention
poor health outcomes
worsening situation
Considerations when assessing vulnerability
- It can be biased
- If identified inappropriately, interventions may worsen the situation
- focus on both strengths & limitations to help adapt to change
- involve family- holistic approach
physiological effects of vulnerability
stress/anxiety -> GI symptoms, decreased appetite, fatigue etc.
psychological effects of vulnerability
oppression
feeling helpless, fearful, angry
uncertainty, loss of control
powerlessness, desperation
social effects of vulnerability
stimatization
social isolation
stereotyping
marginalization