Rhinoscopy
is the visual exploration of the nasal passages with an endoscope. Common
indications for rhiniscopy include chronic nasal discharge, bleeding from
the nose (epistaxis), sneezing, difficulty breathing through the nose
or deformity of the nasal cavity. Through rhinoscopy we are able to visualize
the entire nasal passageway under magnification, remove foreign objects
such as grass awns and obtain biopsy samples of abnormal tissue. We recommend
radiographs or other forms of imaging (CT or MRI) be performed prior to
rhiniscopy in order to look for bone destruction or evidence of other
pathology. Just before the procedure the animal is anesthetized and intubated
to allow exploration of the nasal cavity without pain or irritation that
would cause sneezing. A cuffed endotracheal tube is placed to prevent
inhalation of fluids or foreign material. Two types of endoscopes are
commonly used to evaluate the nasal cavity. First, a flexible scope is
placed above the soft palate to look at the back of the nasal cavity as
it opens into the pharynx. Next, a smaller rigid scope is directed through
the nostrils into the nasal passages. Biopsies are commonly taken with
small biopsy forceps and evaluated by a pathologist for evidence of disease.
The nasal cavity is very vascular and some bleeding is to be expected
after the procedure. Hemorrhage is controlled with nasal packing, epinephrine
drops and head elevation. The procedure generally lasts 15-20 minutes
and most animals recover quickly and are discharged the same day. Therapy
is recommended after biopsy results are received and will be coordinated
with your regular veterinarian as needed.