Wound Dressing Flashcards
What are the primary goals of wound dressings?
- maintain a moist wound bed
- protect surrounding skin
- control exudate
- fill dead space
- protect wound from the environment
- allow gas exchange
- maintain normal thermia
- be impermeable to microorganisms
- be non-traumatic with removal.
What are the benefits of moist wound healing?
- traps endogenous enzymes for autolytic debridement
- preserves growth factors
- reduces pain
- prevents hypertrophic scarring
- speeds up healing
How can you protect surrounding skin when applying wound dressings?
- use skin protectants (e.g., dimethicone, silicone, zinc oxide)
- ensure proper drainage control
- avoid aggressive adhesives
- use gentle adhesives or moisturizers on intact skin
What are the potential complications of excessive moisture in wound care?
- Maceration
- increased wound size
- higher infection risk
What is the purpose of filling dead space in wound care?
- to confine packing material to the wound bed
- ensure sterile technique
- prevent abscess formation
What functions do primary and secondary dressings serve?
Primary: Direct contact, antimicrobial, moisture balance.
Secondary: Protection, cushioning, absorption, and occlusion.
Describe semipermeable film dressings and their contraindications.
Semipermeable Film:
- Thin polyurethane sheets with adhesive, allow gas exchange but are non-absorptive
- Contraindicated for infected or heavily draining wounds.
What are the characteristics of hydrogel dressings?
- amorphous gel or sheet form
- maintains moisture
- reduces heat
- can absorb small exudate
- facilitates autolytic debridement
What are the contraindications for hydrocolloid dressings?
- bleeding, heavily draining wounds
- infected wounds
- dry wounds
- arterial ulcers
- wounds with exposed tendons
What are semipermeable foams and their indications?
Semipermeable Foams:
- Foam dressings that provide thermal insulation, conform to surfaces.
- Used for minimal to moderate exudating wounds like venous ulcers or burns.
Explain alginate dressings and their indications.
- Highly absorbent dressings made from marine algae.
- Suitable for highly exudating wounds and tunneling wounds.
Describe gauze dressings and their use.
Absorbent, permeable, and non-occlusive; used for packing, frequent changes, and managing various wound sizes and etiologies.
What are impregnated gauze dressings?
Gauze with additives like petrolatum or bismuth, used for non-adherent dressing over granulating wounds or as antimicrobial dressing.
What are antimicrobial wound dressings and their types?
Dressings with broad-spectrum antimicrobial agents like silver, iodine, PHMB, and DACC, used for infected wounds.
What factors should be considered in clinical decision-making for wound dressings?
Moisture balance, drainage control, infection prevention, dressing frequency, and wound type (granulating, necrotic, or infected).
Which of the following is a primary goal of wound dressings?
- A) To increase wound pH
- B) To maintain a moist wound bed
- C) To decrease oxygen exchange
- D) To reduce patient complaints without addressing wound healing
- B (Correct): A moist wound environment supports healing by trapping enzymes, reducing pain, and minimizing scarring.
- A (Incorrect): Wound pH should be balanced, not increased.
- C (Incorrect): Oxygen exchange is crucial for wound healing, so decreasing it would be counterproductive.
- D (Incorrect): While reducing patient discomfort is important, it should not come at the expense of wound healing.
What type of wound dressing is typically used for partial-thickness burns and donor sites to maintain moisture?
- A) Hydrocolloids
- B) Alginates
- C) Hydrogels
- D) Impregnated gauze
- C (Correct): Hydrogels are designed to maintain moisture and are effective on partial-thickness burns and donor sites.
- A (Incorrect): Hydrocolloids are better suited for moisture-retentive applications, but they are not typically used for burns.
- B (Incorrect): Alginates are for highly exudating wounds due to their absorbent properties.
- D (Incorrect): Impregnated gauze is primarily used to protect granulation tissue and maintain a moist environment, but it’s less effective than hydrogels for burns.
Which of the following wound dressings is impermeable to bacteria but permeable to oxygen, water vapor, and carbon dioxide?
- A) Semipermeable foam
- B) Semipermeable film
- C) Hydrocolloid
- D) Gauze
- B (Correct): Semipermeable film dressings are designed to be impermeable to bacteria, making them suitable for protecting wounds while allowing gas exchange.
- A (Incorrect): Semipermeable foam dressings are permeable to gas and provide moisture retention but have different properties regarding bacteria permeability.
- C (Incorrect): Hydrocolloids are relatively occlusive and may be impermeable to both gas and bacteria.
- D (Incorrect): Gauze is highly permeable and does not offer bacterial protection.
Which wound dressing is most suitable for highly exudating wounds due to its high absorbent capacity?
- A) Hydrocolloids
- B) Alginates
- C) Impregnated gauze
- D) Transparent films
- B (Correct): Alginates are ideal for managing highly exudating wounds due to their exceptional absorbency.
- A (Incorrect): Hydrocolloids can absorb moisture but are not as effective as alginates for heavy exudate.
- C (Incorrect): Impregnated gauze is primarily used for maintaining moisture rather than absorbing large amounts of exudate.
- D (Incorrect): Transparent films are non-absorbent and mainly used for superficial wounds.
Which dressing type is NOT recommended for infected wounds?
- A) Hydrocolloids
- B) Alginates
- C) Gauze
- D) Semipermeable foam
- A (Correct): Hydrocolloids are moisture-retentive and occlusive, making them unsuitable for infected wounds.
- B (Incorrect): Alginates are suitable for infected wounds because they absorb exudate and can help manage bioburden.
- C (Incorrect): Gauze can be used for both infected and non-infected wounds, allowing frequent dressing changes.
- D (Incorrect): Semipermeable foams can be used on infected wounds, especially when used as secondary dressings to absorb exudate.
Which wound dressing promotes autolytic debridement and allows for wound visualization?
- A) Hydrogel
- B) Semipermeable film
- C) Alginate
- D) Hydrocolloid
- B (Correct): Semipermeable films encourage autolytic debridement and allow clinicians to monitor the wound without removing the dressing.
- A (Incorrect): Hydrogels maintain moisture and facilitate autolytic debridement but do not provide wound visualization.
- C (Incorrect): Alginates are highly absorbent but do not allow for wound visualization.
- D (Incorrect): Hydrocolloids also promote autolytic debridement but are opaque, preventing wound visualization.
Which dressing is particularly effective for wounds with tunneling?
- A) Transparent film
- B) Hydrocolloid
- C) Alginate
- D) Semipermeable foam
- C (Correct): Alginates are suitable for filling wound tunnels and absorbing exudate, making them ideal for tunneling wounds.
- A (Incorrect): Transparent films are not used for tunneling wounds due to their non-absorbent nature.
- B (Incorrect): Hydrocolloids are not ideal for tunneling as they are primarily for surface wounds.
- D (Incorrect): Semipermeable foams can absorb exudate but are not designed for packing into tunnels.
Which type of gauze dressing is impregnated with petrolatum and designed to protect granulation tissue?
- A) Wet-to-dry gauze
- B) Telfa gauze
- C) Adaptic gauze
- D) Kerlix
- C (Correct): Adaptic gauze is designed to protect granulation tissue and prevent it from adhering to the dressing.
- A (Incorrect): Wet-to-dry gauze is primarily used for mechanical debridement and can be traumatic to granulation tissue.
- B (Incorrect): Telfa gauze is non-adherent but does not contain petrolatum and is not specifically for granulation protection.
- D (Incorrect): Kerlix is a type of rolled gauze often used for packing or securing dressings but is not petrolatum-impregnated.
Which dressing is known to support thermal insulation and maintain wound bed temperature for optimal healing?
- A) Hydrocolloid
- B) Semipermeable foam
- C) Transparent film
- D) Impregnated gauze
- B (Correct): Semipermeable foam dressings help retain warmth, supporting cell activity and perfusion in the wound bed.
- A (Incorrect): While hydrocolloids provide some insulation, semipermeable foams are more effective in this regard.
- C (Incorrect): Transparent films do not provide significant thermal insulation.
- D (Incorrect): Impregnated gauze does not offer thermal insulation, as it is primarily focused on maintaining moisture or delivering antimicrobials.
Which dressing is used for wounds that need moisture added to the wound bed?
- A) Alginate
- B) Hydrogel
- C) Semipermeable foam
- D) Gauze
- B (Correct): Hydrogels add moisture, making them ideal for dry or minimally exudating wounds.
- A (Incorrect): Alginates absorb moisture and are meant for highly exudating wounds.
- C (Incorrect): Semipermeable foams absorb moisture but do not add it.
- D (Incorrect): Gauze is permeable and can be used for various purposes but does not actively add moisture.
Which type of dressing is commonly used for donor sites due to its soothing effect and cooling properties?
- A) Hydrocolloid
- B) Alginate
- C) Hydrogel
- D) Transparent film
- C (Correct): Hydrogels maintain moisture and have a cooling, soothing effect, making them suitable for donor sites.
- A (Incorrect): Hydrocolloids are more adhesive and primarily used for moisture retention rather than cooling.
- B (Incorrect): Alginates are better for absorbing exudate and are not typically used for donor sites.
- D (Incorrect): Transparent films do not provide a cooling effect and are used for superficial wounds.
Which of the following dressings creates a gel upon contact with wound moisture to maintain a moist environment?
- A) Transparent film
- B) Hydrocolloid
- C) Alginate
- D) Semipermeable foam
- C (Correct): Alginates create a hydrophilic gel upon contact with wound exudate, providing moisture balance.
- A (Incorrect): Transparent films do not form a gel; they simply cover the wound.
- B (Incorrect): Hydrocolloids also form a gel, but they are not as absorbent as alginates.
- D (Incorrect): Semipermeable foams absorb moisture but do not transform into a gel.
Which dressing is primarily used to cover acute linear wounds without tissue loss?
- A) Skin glue
- B) Hydrogel
- C) Alginate
- D) Transparent film
- A (Correct): Skin glue acts as a primary wound closure option for acute linear wounds, eliminating the need for staples or sutures.
- B (Incorrect): Hydrogels are used to maintain moisture but are not suitable for primary closure.
- C (Incorrect): Alginates are used for absorbing exudate, not closing wounds.
- D (Incorrect): Transparent films protect superficial wounds but are not used for primary closure.
Which dressing is best suited for wounds with fragile surrounding skin, minimizing trauma upon removal?
- A) Semipermeable film
- B) Non-adherent gauze
- C) Hydrocolloid
- D) Impregnated gauze
- B (Correct): Non-adherent gauze is suitable for wounds with fragile surrounding skin as it reduces the risk of trauma.
- A (Incorrect): Semipermeable films may adhere strongly, posing a risk to fragile skin.
- C (Incorrect): Hydrocolloids can be traumatic to remove, especially on delicate skin.
- D (Incorrect): Impregnated gauze can stick to the wound bed or surrounding skin, increasing the risk of trauma.
Which dressing is suitable for managing minimal to moderate exudate while providing thermal insulation?
- A) Transparent film
- B) Semipermeable foam
- C) Alginate
- D) Hydrogel
- B (Correct): Semipermeable foam dressings absorb exudate and offer thermal insulation, making them suitable for wounds with minimal to moderate drainage.
- A (Incorrect): Transparent films do not absorb exudate and primarily protect the wound.
- C (Incorrect): Alginates are designed for high exudate absorption, not minimal to moderate.
- D (Incorrect): Hydrogels add moisture and are not as effective for absorbing exudate.
Which dressing type contains antimicrobial agents, making it effective for reducing wound bioburden?
- A) Hydrogel
- B) Transparent film
- C) Silver-impregnated dressing
- D) Alginate
- C (Correct): Silver-impregnated dressings are specifically designed to manage wound infection by reducing bacteria.
- A (Incorrect): Hydrogels are primarily used to add moisture and do not typically contain antimicrobial agents.
- B (Incorrect): Transparent films do not have antimicrobial properties.
- D (Incorrect): Alginates are absorbent but not inherently antimicrobial.
Which dressing is primarily indicated for minimally exudating necrotic wounds to facilitate autolytic debridement?
- A) Hydrogel
- B) Alginate
- C) Hydrocolloid
- D) Semipermeable foam
- C (Correct): Hydrocolloids are occlusive, retaining moisture and aiding in the breakdown of necrotic tissue in minimally exudating wounds.
- A (Incorrect): Hydrogels add moisture but are better suited for dry wounds rather than necrotic ones.
- B (Incorrect): Alginates are designed for highly exudating wounds.
- D (Incorrect): Semipermeable foams absorb moisture but are not intended for necrotic tissue debridement.
Which dressing type requires a secondary dressing due to its non-adherent nature and lack of absorption?
- A) Transparent film
- B) Alginate
- C) Hydrogel sheets
- D) Impregnated gauze
- D (Correct): Impregnated gauze is used to protect granulation tissue and requires a secondary dressing to secure it.
- A (Incorrect): Transparent films may also need a secondary dressing in certain cases but are primarily designed as standalone dressings.
- B (Incorrect): Alginates generally require a secondary dressing, but they have high absorbent capacity.
- C (Incorrect): Hydrogel sheets provide moisture and typically need a secondary dressing to maintain position.
Which type of dressing is specifically designed to absorb urine and stool in addition to wound exudate, acting as a barrier?
- A) Hydrogel
- B) Alginate
- C) Hydrocolloid
- D) Semipermeable film
- C (Correct): Hydrocolloids are impermeable to fluids like urine and stool, making them effective for maintaining a clean environment around the wound.
- A (Incorrect): Hydrogels add moisture but do not provide a barrier against external fluids.
- B (Incorrect): Alginates are highly absorbent but do not act as barriers to urine or stool.
- D (Incorrect): Semipermeable films protect against bacteria and moisture but are not as effective against urine or stool.
Which dressing is most effective for autolytic debridement in wounds with slough?
- A) Transparent film
- B) Semipermeable foam
- C) Hydrogel
- D) Hydrocolloid
- D (Correct): Hydrocolloids retain moisture, facilitating the natural breakdown of slough through autolytic debridement.
- A (Incorrect): Transparent films also promote autolytic debridement but are less effective than hydrocolloids for wounds with slough.
- B (Incorrect): Semipermeable foams absorb moisture but do not excel at facilitating autolytic debridement.
- C (Incorrect): Hydrogels maintain moisture but are not as effective in managing slough as hydrocolloids.
Which wound dressing is often used in conjunction with ultrasound therapy due to its ability to serve as a coupling medium?
- A) Alginate
- B) Hydrogel
- C) Semipermeable foam
- D) Hydrocolloid
- B (Correct): Hydrogels maintain moisture and are suitable for use as a coupling medium in ultrasound therapy.
- A (Incorrect): Alginates are primarily absorbent and not used as a coupling medium.
- C (Incorrect): Semipermeable foams provide moisture retention but are not suitable for ultrasound coupling.
- D (Incorrect): Hydrocolloids are not effective as coupling media for ultrasound therapy.
Which dressing type can absorb up to 20 times its weight and is suitable for highly exudating wounds?
- A) Hydrogel
- B) Alginate
- C) Hydrocolloid
- D) Semipermeable film
- B (Correct): Alginates are designed to absorb large amounts of exudate, keeping the wound moist and managing drainage.
- A (Incorrect): Hydrogels add moisture rather than absorb it, making them unsuitable for highly exudating wounds.
- C (Incorrect): Hydrocolloids absorb moisture but do not reach the capacity of alginates.
- D (Incorrect): Semipermeable films are not absorbent and are used primarily to protect superficial wounds.
Which dressing is most appropriate for venous insufficiency ulcers due to its high absorbency and conformability?
- A) Semipermeable foam
- B) Hydrocolloid
- C) Hydrogel
- D) Transparent film
- A (Correct): Semipermeable foams absorb exudate while providing padding and conformability, which is ideal for venous ulcers.
- B (Incorrect): Hydrocolloids are also used for ulcers but are less absorbent than semipermeable foams.
- C (Incorrect): Hydrogels are more appropriate for dry wounds and do not absorb as much exudate.
- D (Incorrect): Transparent films do not absorb exudate and are not suitable for venous ulcers.
Which dressing should be avoided on third-degree burns due to its moisture-retentive properties?
- A) Semipermeable film
- B) Hydrocolloid
- C) Alginate
- D) Hydrogel
- B (Correct): Hydrocolloids create an occlusive environment, which is not suitable for third-degree burns that require ventilation and frequent monitoring.
- A (Incorrect): Semipermeable films are generally used for superficial wounds and not for severe burns, but they do not retain moisture to the same extent as hydrocolloids.
- C (Incorrect): Alginates are used for exudating wounds, not for third-degree burns.
- D (Incorrect): Hydrogels provide moisture and are sometimes used to soothe partial-thickness burns, not third-degree burns.
Which type of dressing should be used to manage a heavily colonized wound?
- A) Hydrogel
- B) Silver-impregnated dressing
- C) Transparent film
- D) Semipermeable foam
- B (Correct): Silver-impregnated dressings help control bioburden in heavily colonized wounds.
- A (Incorrect): Hydrogels provide moisture but lack antimicrobial properties.
- C (Incorrect): Transparent films are not designed to reduce wound bioburden.
- D (Incorrect): Semipermeable foams absorb exudate but do not have inherent antimicrobial effects.
Which dressing is often used to protect against shear forces on superficial wounds?
- A) Hydrocolloid
- B) Semipermeable film
- C) Alginate
- D) Gauze
- B (Correct): Semipermeable films are flexible and adhere well, reducing the risk of shear damage.
- A (Incorrect): Hydrocolloids are thicker and provide less protection against shear forces.
- C (Incorrect): Alginates are designed for highly exudating wounds, not shear protection.
- D (Incorrect): Gauze does not protect well against shear forces.
Which specialty dressing is primarily used to manage wound odor by adsorbing bacteria and other pathogens on its surface?
- A) Honey-impregnated dressing
- B) Carbon dressing
- C) Collagen dressing
- D) Composite dressing
- B (Correct): Carbon dressings are used primarily to manage odor by adsorption without absorbing moisture into the wound bed.
- A (Incorrect): Honey-impregnated dressings have antimicrobial properties but are not specifically for odor control.
- C (Incorrect): Collagen dressings focus on donating collagen to the wound bed and improving tissue strength.
- D (Incorrect): Composite dressings are designed for absorption and barrier protection but do not specifically target odor management.
Which dressing stimulates angioblasts, fibroblasts, and monocytes while also providing an antimicrobial effect?
- A) Carbon dressing
- B) Collagen dressing
- C) Honey-impregnated dressing
- D) Composite dressing
- C (Correct): Honey-impregnated dressings have both antimicrobial and healing-stimulating properties, making them effective for various wound types.
- A (Incorrect): Carbon dressings are mainly used for odor management, not for stimulating healing cells.
- B (Incorrect): Collagen dressings donate collagen to the wound bed but do not have the antimicrobial or cell-stimulating properties of honey.
- D (Incorrect): Composite dressings focus on moisture absorption and barrier protection, not cellular stimulation.
Which dressing is designed to neutralize elevated matrix metalloproteinases (MMPs) in chronic wounds by donating collagen to the wound bed?
- A) Collagen dressing
- B) Hydrogel
- C) Alginate
- D) Composite dressing
- A (Correct): Collagen dressings promote healing by attracting fibroblasts and macrophages, as well as neutralizing harmful enzymes like MMPs.
- B (Incorrect): Hydrogels provide moisture but do not donate collagen or impact MMP levels.
- C (Incorrect): Alginates absorb exudate and do not interact with MMPs.
- D (Incorrect): Composite dressings provide multiple layers of protection but do not donate collagen or target MMPs.
Which composite dressing layer provides a bacterial barrier while allowing moisture vapor transmission?
- A) Inner contact layer
- B) Middle absorbent layer
- C) Outer semipermeable layer
- D) Collagen layer
- C (Correct): The outer semipermeable layer in composite dressings prevents bacterial contamination while permitting moisture vapor to escape.
- A (Incorrect): The inner contact layer is designed to prevent trauma to the wound bed.
- B (Incorrect): The middle absorbent layer is responsible for managing exudate.
- D (Incorrect): Collagen layers are not typically a component of composite dressings.
Which dressing type is contraindicated for wounds with exposed bone or tendon?
- A) Alginate
- B) Hydrocolloid
- C) Hydrogel
- D) Semipermeable foam
- B (Correct): Hydrocolloids can retain excessive moisture, which is not suitable for wounds with exposed bone or tendon.
- A (Incorrect): Alginates can be used with exposed structures as long as a secondary dressing is applied.
- C (Incorrect): Hydrogels are used to maintain moisture and can be used over exposed bone or tendon to keep tissues viable.
- D (Incorrect): Semipermeable foams can cover exposed structures, provided they are combined with appropriate primary dressings.
Which type of skin substitute is derived from the patient’s own tissue, minimizing rejection risk?
- A) Allograft
- B) Autograft
- C) Xenograft
- D) Amnion
- B) Autograft - Autografts are derived from the patient’s own tissue, which minimizes the risk of rejection since the immune system recognizes the tissue as its own.
- A (Incorrect): Allografts come from a different person, increasing the chance of immune response.
- C (Incorrect): Xenografts are from a different species and have a higher rejection rate.
- D (Incorrect): Amnion is derived from human placenta but is not specific to the patient.
Which skin substitute involves the use of tissues from a different species and has a higher likelihood of rejection?
- A) Allograft
- B) Autograft
- C) Xenograft
- D) Chorion
- C) Xenograft - Xenografts are skin substitutes sourced from a different species, such as pigs, and have a higher risk of rejection due to species incompatibility
- A (Incorrect): Allografts are from human donors and are more compatible than xenografts.
- B (Incorrect): Autografts are from the patient’s own tissue, making rejection unlikely.
- D (Incorrect): Chorion, part of human placenta, may be used in skin substitutes but is not a xenograft.
Dialkylcarbamoyl chloride (DACC) dressings work by:
- A) Releasing antimicrobial agents directly into the wound bed
- B) Physically binding bacteria to reduce exotoxin production
- C) Absorbing moisture and drying out the wound
- D) Increasing collagen production
- B) Physically binding bacteria to reduce exotoxin production - Dialkylcarbamoyl chloride (DACC) dressings attract and bind bacteria, reducing their ability to release toxins, which helps control infection without directly releasing antimicrobial agents.
- A (Incorrect): DACC does not release antimicrobials; it binds bacteria.
- C (Incorrect): DACC’s primary function is not drying the wound but managing bacterial load.
- D (Incorrect): It does not stimulate collagen production.
Which growth factor, found in wound healing products, promotes angiogenesis and is often used for chronic wounds?
- A) Epidermal Growth Factor (EGF)
- B) Platelet-Derived Growth Factor (PDGF)
- C) Vascular Endothelial Growth Factor (VEGF)
- D) Transforming Growth Factor Beta (TGF-β)
- C) Vascular Endothelial Growth Factor (VEGF) - VEGF is involved in promoting angiogenesis (formation of new blood vessels), making it beneficial for chronic wound healing.
- A (Incorrect): EGF promotes epithelial cell proliferation but not angiogenesis.
- B (Incorrect): PDGF is important for cell proliferation but is not specifically angiogenic.
- D (Incorrect): TGF-β has roles in immune modulation and tissue repair but does not directly promote angiogenesis.
In clinical decision-making, which factor is most important for choosing a dressing for a wound with slough and moderate drainage?
- A) Dressing impermeability
- B) Granulation status
- C) Absorptive capacity and autolytic debridement
- D) Frequency of dressing change
- C) Absorptive capacity and autolytic debridement - Wounds with slough and moderate drainage benefit from dressings that absorb exudate and promote autolytic debridement to break down necrotic tissue.
- A (Incorrect): Impermeability alone would not be suitable for wounds needing debridement.
- B (Incorrect): Granulation status influences dressing choice but is secondary for wounds with slough.
- D (Incorrect): Frequency of change is important but does not primarily address slough management.
Which factor would most influence the frequency of dressing changes for a wound with high bioburden?
- A) Absorptive capacity
- B) Wound infection status
- C) Moisture balance
- D) Granulation tissue presence
- B) Wound infection status - For wounds with high bioburden, the infection status often necessitates more frequent dressing changes to reduce bacterial load and monitor healing.
- A (Incorrect): Absorptive capacity is relevant but secondary to controlling infection.
- C (Incorrect): Moisture balance is important but less critical than infection management.
- D (Incorrect): Granulation tissue presence would not determine frequency as directly as infection status.