NEWSLETTER
No 36 April 1999
Newsletter Archives
Contents
1. BSAVA Congress
2. Lymphoma evaluation
3. Who’s who in the
office
4. New test for Occult
Hyperthyroidism in cats
5. New test "Sick Euthyroid
Factor"
6. Getting in a spin,
can you afford not to have a centrifuge.
7. FAQ –Can I check for
tumour cells in a urine sample?
8.
Postal Regulations – Latest News
9. Stating the
obvious.
BSAVA
Congress 1999
Back in beautiful Birmingham for another
busy Congress. We are a bit disappointed this year with Stand arrangements.
Such has been our growth over the past two years we applied for a larger
stand space to do justice to our position in the market place. Due to a
combination of increased demand for stand space and a change in the fire
regulations which has resulted in wider passages between the stands in
the main hall we were refused a larger stand. To add insult to injury we
were demoted to the upper balcony area.
Please come and find us, we are close
to the Bar on the balcony overlooking the main hall. A time to put faces
to names, I hope no body is too disappointed. Browse our new Web Site in
the Cyber Café.
An interesting new service for those involved
with oncology and chemotherapy is our new technique evaluation lymphomas
Lymphoma
evaluation
Silver Staining (AgNOR) techniques as
a prognostic indicator with canine lymphoma
The AgNOR silver staining technique is
a valuable prognostic marker for canine malignant lymphomas, providing
a quantitative prognostic marker for proliferation.
With the information provided the veterinary
surgeon is better placed to help owners to make an informed decision about
the possible benefits of chemotherapy. Currently interpretation is based
on histological sections from lymph node excision biopsies. We are evaluating
the technique on fine needle aspirates (FNA's) from affected nodes. If
you feel you may have a use for this technique please make contact so that
we can discuss the method more fully or request information leaflet - AgNOR
Silver Staining Technique.
Who’s
who in the office
The front office is the heart of the laboratory.
This the first point of contact that most clients have with the laboratory.
Joanne co-ordinates activities and is ably supported by Lorrain, Annette
and Betty.
The pace of activity in the office has
too be experienced to be believed. From 8.00 am when the doors open to
5.30pm when they close, that’s if they are lucky. The ringing of the telephone
and the chirping of the modems never slackens.
We collect our post and opening is well
under way by 8.10am. The team of office and laboratory staff carefully
open packages, check the forms and samples. The information is entered
in the computer everything uniquely identified and distributed to the different
laboratory departments. Meantime the phones have started ringing. A report
to be discussed before surgery starts, a courier collection required. Then
there are the queries. Is this sample from a dog or a cat? I can’t read
what test is required! No age, no sex (no comment). One member of the staff
usually spends up to an hour on the phone each morning sorting out the
anomalies on samples submitted.
Joanne has responsibility for client services.
In addition to sorting out day to day problems and enquiries, Joanne works
closely with regular clients ensuring that they are receiving the high
standard of service they expect. She follows up enquiries from new or prospective
clients and leads generated by the sales staff in the field.
Lorrain makes sure every one receives their
request forms postal packs and sampling requirements as well as ensuring
reports are correctly generated and faxed or posted.
Twinkle fingers Annette looks after the
bulk of the technical typing. She has the fastest set of digits out side
of a computer. Annette has the typing speed of a Pentium III processor
and doesn’t crash nearly as often.
Betty is our newest recruit, her soft voice
and quiet manner disguises her background in medical reception. She is
coping well with the cauldron of office activity.
New
test for Occult Hyperthyroidism in cats
Hyperthyroidism is one of the most commonly
diagnosed conditions in the older cat. Clinical signs are often quite characteristic.
characteristic symptoms of …… combined with a detectable enlargement of
one or both thyroid glands The test of choice for confirmation is a Total
T4 (T4). However a significant proportion of cases my reveal a low or low
normal T4. These animals often show of concurrent kidney or liver problems.
This presents the question is there an underlying hyperthyroidism or not.
It is now possible to differentiate by determining FreeT4 following equilibrium
dialysis of the sample (FT4d). This test eliminates factors which may interfere
in the establishment of the true Free T4 value.
Cats with occult hyperthyroidism show
high levels of FT4d values whilst cats with "Sick Euthyroid" effect show
low or normal levels of FT4d.
New
test "Sick Euthyroid Factor"
How can you be sure that a low T4 due
to hypothyroidism? It could be the result of concurrent disease. We are
pleased to offer a new test to help clarify this diagnostic dilemma. Dogs
showing low or low normal T4 values in addition to abnormal haematological
and general biochemistry changes or suspect hyperthyroid Cats with normal
T4 levels should be tested. Ask for Sick Euthyroid Factor (SEF). A simple
way to clarify your diagnosis. If you submitted sufficient sample originally
no additional sampling will be required.
Getting
in a spin, can you afford not to have a centrifuge.
Question - Is a centrifuge a luxury or
a necessity in a modern veterinary practice? Answer – A necessity.
For accurate biochemical test results
it is essential to submit samples of appropriate quality. The commonest
cause of poor sample quality is haemolysis. There may be occasions when
haemolysis may be impossible to avoid regardless of what steps you take.
However for the other 99.9% of the time simplest solution is to separate
the serum or plasma from the red sells or clot as soon as possible after
collection. This means you need a centrifuge. It is possible to purchase
a suitable new centrifuge for around £200 or a second hand one for
under £100. It is usually a good idea to purchase one that can also
be used to provide a haematocrit. LINKS. To make your job even easier we
supply Gel Separation tubes which means you don’t even need to remove the
serum from the tube before you send it to the lab. Submitting unseparated
samples wastes everybody’s time and effort but more importantly the results
you receive could be seriously misleading. In addition to separating serum
samples it is also helpful to remove heparin plasma and oxalate fluoride
plasma before submission but make sure you label the tubes clearly.
Serum Gel tubes and plain tubes for separated
plasma are available on request from client services, call 01253 899215.
FAQ
–Can I check for tumour cells in a urine sample?
Submitting plain urine samples for the
detection of neoplastic cells is likely to result in a false negative result.
These delicate cells deteriorate rapidly in normal urine.
When a bladder neoplasm is suspected equal
parts urine and "Cytofix" should be mixed together to fix and preserve
any abnormal cells. If possible two samples should be prepared. One should
be submitted untouched and the other spun down at slow speed in a centrifuge
for about 10 minutes to concentrate any cells present. Neoplastic cells
may only be present in small numbers. pour off the excess urine and resuspend
any cells in the residual fluid by flicking the tube. With a pipette place
one drop on a clean microscope slide (if possible use NWL cyto-slides,
these ensure adhesion of any cells to the slide surface). do not smear
the cells allow to dry naturally. Place in a postal container for safe
submission. Make at 2 or more preparations slides. You can submit the remaining
residue as well. If normal urinalysis is required submit a sample in a
plain and boric acid tube.
Postal
Regulations – Latest News
The Royal Mail continue to heap confusion
upon confusion with regard to their desire to protect their work force
from the ravages of pestilence. As may have been suspected from the outset
the issue has become Europeanised. In their efforts to define what constitutes
a hazard to all concerned no body seems to have considered just what risk
the shipment of diagnostic samples presents compared with known pathogens.
In these days of risk management and hazard analysis it is not unreasonable
to expect a more analytical approach to the establishment of a fair and
considered decision. The wrong decision could have a significant impact
on not only the livelihood of many individuals and businesses but there
could be a significant welfare issue to consider as well.
Stating
the obvious.
It may seem like stating the obvious but
you would be surprised how many samples submitted for histology and cytology
do not include the site from which the sample was taken. Please describe
the site and or the lesion. It helps us to help you. Thank you.
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