Types of Wound Healing

Question 1

First intention (primary union)

Answer 1

. Happens when the wound
edges are approximated e.g.
by sutures, staples or glue.
– Lag/inflammatory response
. Injury – 3/5 day
– Proliferation
. 3rd – 20th day
. 25% - 30% strength
– Maturation
/differentiation
. 14th – 12mos
Side to side

Question 2

– Lag/inflammatory response

Answer 2

. Injury – 3/5 day

Question 3

– Proliferation

Answer 3

. 3rd – 20th day
. 25% - 30% strength

Question 4

– Maturation
/differentiation

Answer 4

. 14th – 12mos
Side to side

Question 5

Second intention (granulation)

Answer 5

. A wound that is extensive and involves considerable tissue loss, and in which the edges cannot be brought together by sutures, heals in this manner.
Secondary intention healing
differs from primary intention healing in three ways:
The repair time is longer.
– Large wounds
– Infected wounds
– “proud flesh” excessive
granulation

Question 6

Third intention (delayed
primary closure)

Answer 6

– A method of closing a
grossly contaminated
wound in which the
wound is left open until
contamination has been
markedly reduced,
granulation has occurred
(maturation) and
inflammation has
subsided and then is
closed by first intention.