The main purpose of this Manual is to provide useful guidelines for the selection of pathology tests and to facilitate interpretation of results.
Contains a comprehensive listing of all genes from the Human Gene Nomenclature Committee (HGNC) database alongside laboratories and tests available in the country.
A manual for the process of macroscopic dissection in Anatomical Pathology laboratories.
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Keywords: APC, Activated protein C
4.5 mL blood in 0.5 mL citrate.
Coagulation tests in the presence and absence of activated protein C, the clotting times are recorded.
The ratio of clotting times with and without activated protein C is determined.
APTT-based method. Guide only, check with laboratory.
Normal: > 2.2
Abnormal: < 2.0
RWT-based method. Guide only; check with laboratory.
Normal: > 1.8
Abnormal: < 1.6.
Investigation of tendency to venous thromboembolism: unexplained, recurrent, or with a positive family history.
The test has high sensitivity and specificity and is an adequate initial test, except for patients receiving heparin or warfarin and those with other abnormalities of coagulation.
In these circumstances, DNA testing for detection of the abnormal factor V gene is also available.
Activated protein C resistance is associated with an increased risk of venous thromboembolism.
However, as the condition is detectable in ~5% of all individuals, an abnormal APCR result does not necessarily indicate a predisposition to future thrombosis.
The disorder is characterised by a low anticoagulant response of plasma on addition of activated protein C.
The abnormality has been reported in 20-60% of patients with venous thromboembolism, although thrombosis usually only occurs when additional risk factors are present.
A single gene mutation (factor V Leiden) has been described in >90% of APC resistant patients and can be detected by DNA testing.
Acquired APC resistance may occur in pregnancy and in the presence of inflammation.
See also Factor V Leiden.
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The RCPA is the leading organisation representing Pathologists and Senior Scientists in Australasia.
Its mission is to train and support pathologists and senior scientists and to improve the use of pathology testing to achieve better healthcare.
The annual scientific meeting for the RCPA which covers the scientific disciplines of Anatomical, Chemical, Forensic, Genetic, General, Haematology, Immunopathology and Microbiology.
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