Bright Instruments
43
3.7 CUTTING TEMPERATURES
Standard textbooks on histological
technique give tables of recommended cutting
temperatures for different tissues. However, in
most cases, the following guidelines will
prove adequate.
3.7.1 FRESH UNFIXED TISSUE
Most soft tissues will cut at -18ºC to -20ºC.
Fatty tissue, such as breast lumps, will need
lower temperatures, -25ºC or colder. Brain and
spinal cord cut best at warmer temperatures,
e.g. minus 12ºC. Below is a table extracted
from IMVS Division of Pathology, The Queen
Elizabeth Hospital.
Sectioning temperature guidelines for fresh
unfixed tissue:
(Add 5°C to 10°C for fixed tissue.)
Tissue Type:
Temp. (ºC.)
Uterine curettings
-7
Brain
-10
Liver
-10
Spleen
-10
Testis
-10
Thyroid
-10
Lip
-13
Lymph Node
-15
Kidney
-15
Lung
-16
Muscle
-16
Connective Tissue
-16
Skin
-16
Heart
-18
Pancreas
-20
Uterus
-20
Tissue Type:
Temp. (ºC.)
Cervix
-20
Ovary
-20
Prostate
-20
Gut
-20
Bone Marrow
-20
Skin with fat
-25
Breast
-30
Omentum
-35
3.7.2 FIXED TISSUE
Differences between tissues are much reduced
after fixation. Cutting temperatures around
-10ºC to -15ºC are recommended, but some
experimenting may be required. Ensure
fixative is rinsed off tissue before freezing.
3. Cutting & Collecting
Sections Cont.
Содержание OTF6000
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