jenny schneider
Flashcards by jenny schneider, updated more than 1 year ago
jenny schneider
Created by jenny schneider about 6 years ago


revision exercise for phar2101 lecture

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Question Answer
How do a passive/inert dressing and an active dressing differ? active dressings promote healing by maintaining a moist wound environment. A passive/inert dressing is used on simple low exudate superficial wounds or as a secondary dressing
What is a primary dressing and what is a secondary dressing? primary dressings are placed directly on wound while a secondary dressing is used to cover a primary dressing
what type of wound is a passive dressing often used on? minor superficial wound
what are gauze products used for in wound care? cleaning wounds primary dressing for minor wounds wet dressings secondary dressings
what are some disadvantages of gauze dressings? can allow wound to dry can shed fibres into wound and contaminate wound can adhere to wound surface if used as primary dressing (trauma on removing) are permeable to bacteria
what can non-woven fixation sheets be used for? used directly on minor wounds eg minor dressing for gravel rah wounds or may also be used as a secondary dressing
Describe the design of non-adherent dressings they have a non-stick inner film layer absorbent pad hydrophobic backing layer
what are non-adherent dressing used for? low to moderate absorption dressings- primary dressing for minor or low exudate superficial wounds; can also be sued as island dressing when attached to adhesive secondary dressing
what are some advantages of non-adherent dressings? low wound adherence to low exudate wounds some island dressings with non-adherent pad are waterproof
what are some disadvantages of non-adherent dressings? wound may dry out there is still a risk of adherence causing trauma when removed if used as primary dressing should not be used on dry wounds products may vary in absorbency
what are non-absorbent pads used for? clean and sutured wounds abrasions and lacerations minor burns
Describe design of paraffin gauze (tulle) dressings piece of woven cotton or viscose impregnated with yellow or white soft paraffin
what are paraffin gauze dressings used for? minor burns superficial wounds
what are advantages and disadvantages of paraffin gauze drsssings? advantages: low adhesion and provide moist environment disadvantages: permeable to bacteria, granulating tissue may grow through mesh; waterproof paraffin film can macerate some wounds; requires a secondary dressing; not absorbent
describe design of film dressing these are transparent, semi-permeable adhesive films that are permeable to gas and water vapour but impermeable to micro-organisms
what are common uses for film dressings? manage minor burns manage minor injuries ( abrasions, scalds) protective layer around IV catheters secondary dressings used to prevent/treat superficial pressure areas
what are advantages of film dressings? waterproof; gas/vapour permeable flexible transparent provide protection from friction/microbes reduce pain allow easy inspection of wound
what are disadvantages of film dressings? exudate may pool under film may be difficult to apply removal may cause trauma to wound or frail skin replace if there is leaking exudate
True or False: film dressings are transparent polyurethane films and are used on superficial wounds and as primary dressing over sutures True
True or False Gauze and lint dressings and swabs can shed fibres that can contaminate a wound True
How do Foam dressings work? these absorb exudate and provide a moist environment, they are protective and cushioning
describe the general design of a foam dressing breathable waterproof film absorbent polyurethane foam layer perforated non-adherent film that goes on surface of wound
Should foam dressings be used on dry wounds? No
which of the following is not a role of a wound dressing? to allow wound to dry out to absorb wound exudate to promote a healing environment to maintain wound bed temperature to protectefrom trauma and contamination all are roles EXCEPT allowing wound to dry out
Describe the design of a hydro-active dressing consist of a polyurethane gel matrix and a waterproof top player
True or False: hydroactive dressings can absorb large amount of exudate True
True or False: Hydroactive dressings differ from hydrocolloid dressings in that they do not produce a gel True
True or False: Hydro active dressings absorb a large amount of exudate and swell True
Describe the design of a hydrocolloid dressing self-adhering wafer type dressing with hydrophilic surface particles (bound to a hydrophobic polymer)- they absorb exudate from wound to form gel
what type of wound would a hydrocolloid dressings be used on? light to moderate exudate present, sloughy wounds, leg ulcers, pressure ulcers
What are advantages of hydrocolloid dressings? conform to wound reduce pain by keeping nerve ends moist clean and debride wound by autolysis protective can remain in place for several days
What are disadvantages of hydrocolloid dressings? edges may roll and need taping the gel formed can be confused with slough or pus may cause hypergranulation with prolonged use
what are two types of hydrogels? sheet hydrogels amorphous hydrogels
describe design of sheet hydrogel inert matrix of insoluble polymers-water donating-transparent solid gel sheet covered with semi-permeable outer layer
do hydrogel sheet dressing contain a lot of water? yes about 60%
what are amorphous hydrogels sued for? dry wounds, chicken pox and shingle rashes, sunburn, simple scalds, minor burns
What are alginate dressings made from derived from alginic acid found naturally in brown seaweed; alginates have complex structure made from two uronic acids-guluronic acid and mannuronic acid
How do alginate dressings work? when placed on exudating wound, the calcium ions in alginate exchange with sodium ions in wound fluid to form a hydrophilic gel this provides a moist environment and is highly absorbent, conformable, protective, haemostatic and non-adherent
what are some advantages of alginate dressings? non-allergenic relieve pain some forms pack into cavities
what are some disadvantages of alginate dressings? gel may be confused with slough, pus secondary dressing required
How do hydrofibre dressings work? based on hydrocolloid technology- hydrofibres made of non-woven sodium carboxymethylcellulose spun into fibres and then into sheets and ribbon dressings- they absorb exudate and form gels but do not have haemostatic properties of alginates
what would a dressing which contained charcoal be used for? malodorous wound (wound with bad smell)
why might a dressing contain silver? silver is a broad spectrum antimicrobial agent
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