Skin, Hair & Faecal Samples Flashcards
What ppe should be worn during skin examinations?
Gloves
Apron
Long sleeves
In some cases masks
Good hand hygiene
What patient preparation is required for skin and hair analysis?
-sedation of conscious
-check if on any medications (some treatments must be stopped before sampling)
-consent for investigation
What diagnostic tests are available for skin and hair?
-skin scrapes
-hair plucking
-sellotape impressions
-coat brushing
-wet cotton wool test
-swab sample
-tissue biopsy
How is coat brushing test carried out, and what can it identify?
-restrain animal
-comb to collect samples
-brush in one direction
-transfer sample to wet cotton wool or microscope slide
-fleas, walking dandruff, ticks, lice, ear mites, eggs
What are the advantages of carrying out coat brushing?
-simple to perform
-not invasive
-not stressful
-cheap
How is tape impressions carried out, what can it identify?
-restraint
-identify correct area to be sampled
-part the fur
-impression took 2-3 times on same spot
-transferred to microscope slide
-fleas, lice, mites
What are the advantages and disadvantages of using tape impressions?
A
=cheap and easy
=rapid
=can be used in hard to reach places
D
=only used on dry areas
How should hairs be plucked for examination?
-use tweezers or forceps
-individual hairs plucked
-important that the hair root is plucked out
-hair taken from edge of lesion if present
What are the advantages and disadvantages of plucking hairs?
A
=quick
=simple
D
=can be painful
=may not get positive sample
How are skin scrapes carried out, what can it identify?
-restraint
-conscious or sedated
-use scalpel blade to remove the surface layer of the skin
-imprimatur to go deep enough to cause petechial blood oozing
-transferred to microscope slide
-deep burrowing mites
What are the advantages and disadvantages of using skin scrapes?
A
=diagnoses deeper dwelling parasites
=quick
=simple
D
=painful
=stressful
=must ensure concert technique is used
How are ear swab samples carried out, what does it identify?
-must be sterile
-charcoal swabs used
-cotton buds smeared onto microscopes
-sample can be sent off to external lab
-identifies bacteria, fungi, yeast infections
How are pustules examined?
-contents of pustule extracted using a sterile needle with 1-2ml syringe
-expressed directly onto microscope slide
-smear or squash microscope prepared
-samples examined fresh or stained
How is a biopsy carried out?
-required light sedation of full GA
-minor surgical procedure
-uses biopsy punch to remove a circle of diseased skin when the problem is deeper than the epidermis layer
-sample usually sent to external lab
Why is faeces examined?
Provides info on the health of the GI tract and how well it is functioning