Wound Healing Flashcards
What are the different types of wound closures
Primary intention, Secondary intention, and Tertiary intention
What is primary intention?
Wound edges are approximated and held by mechanical means (e.g. staples, adhesives, sutures, tape)
What is the purpose of primary intention?
Serves to minimize new tissue formation within the wound by getting rid of dead space, reduce scar formation and avoid having a depressed scar.
Full thickness wounds and surgical wounds are appropriate for which type of wound closure?
Primary Intention
What are the benefits of a primary intention wound closure?
Minimal risk of infection, tissue loss, and scarring, enhanced wound closure.
What is secondary intention?
The wound is left open and the wound edges come together naturally by means of granulation and contraction.
Wounds edges can be approximated with secondary intention wound closures.
TRUE OR FALSE
False. Wound edges cannot be approximated
What type of wounds are used for secondary intention type wound closures?
Chronic wounds (pressure injuries, venous ulcers, diabetic ulcers, and surgical incisions with tissue loss)
What are the disadvantages of secondary intention wound closures?
Greater amount of tissue loss, higher risk of infection, and decreased tensile strength (80%), increased risk of recurrence, and longer healing times. (Scar tissue is not as strong as original skin.(
Describe secondary intention wound closures.
The wound is left open and the wound edges come together naturally by means of GRANULATION and CONTRACTION.
Describe tertiary intention wound closures
Typically closed with sutures, staples, or adhesive skin closures. Used on surgical or traumatic wounds left open to heal to remove bacteria and contamination with closure after a delay of days to weeks.
What are the 2 main mechanisms of healing?
Regeneration and Scar formation
What is regeneration?
It is the replacement of damaged or lost tissue with new tissue. Seen with partial-thickness wounds impacting epidermis and superficial dermis layers only.
What is scar formation?
It is a mechanism of healing which is the replacement of damaged or lost tissue by connective tissue that lacks some of the functions of the original tissue.
Seen with full-thickness wounds with skin loss through the epidermis, dermis, into the subcutaneous tissues, and possible bone, muscle, and tendon involvement.
What is the main function of phase 1 hemostasis?
Coagulation and secretion of growth factors.
