Skin biopsy techniques Flashcards
Scars on the chest often stretch.
F Scars on back.
The ventral forearm has a tendency to heal well after biopsy.
F
The dorsum of the hand has a tendency to heal well after biopsy.
T
There is a theoretical risk of interaction of local anaesthetic and adrenaline with MAO inhibitors, beta blockers and TCAs
T
Crust should be gently removed by irrigation prior to biopsy.
T
20% neutral buffered formalin is the usual fixative used for biopsies.
F 10%
Colonisation with S.aureus is more common in patients with psoriasis, atopic dermatitis, diabetes, IVDUs, or those taking isotretinoin
T
Sterile gloves have a 0.15-0.3% failure rate.
F 1.5-3%. Increases to 66% after 15 mins.
There is a 30% incidence of unnoticed punctures during procedures.
T
Skin tags can be pulled away from the surface and snipped at the base
T
Infection is less likely from a shave or curette biopsy compared to a punch or incisional approach.
T
Antibiotics should be considered for all procedures below the knee, wedge excision of the lip and ear, and lesions in the groin.
T
In order to be effective and truly prophylactic, antibiotics should be administered 30 mins before a procedure.
T
There is good evidence to support the use of prophylactic topical antibiotics.
F
It is best to pull polypoid lesions very firmly prior to performing a snip excision.
F Firmer pulling results in a wider cut, including non-involved skin at the base.
