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The value of different anticoagulants as preservatives of specimens for prothrombin time ratios is evaluated and discussed. An increase in the ratio was demonstrated with all anti-coagulants after 24 hours and this was significant when coagulometer error was taken into account. Both solid and liquid sodium citrate were superior to sodium oxalate as preservatives at 24 hours after taking off samples, but differences were slight and were not significant when coagulometer error was considered. It was concluded that for routine clinical practice, where a range of the prothrombin time ratio of 1.8/1 to 2.5/1 is allowable, there would be no significant advantage in any of the anticoagulants considered.
D M Ramsay, and
E P Robertson, and
E MacArthur
January 1979,
The Medical journal of Australia,
D M Ramsay, and
E P Robertson, and
E MacArthur
November 1978,
The Medical journal of Australia,
D M Ramsay, and
E P Robertson, and
E MacArthur
June 1993,
American journal of clinical pathology,
D M Ramsay, and
E P Robertson, and
E MacArthur
November 1979,
Lancet (London, England),
D M Ramsay, and
E P Robertson, and
E MacArthur
December 1998,
Clinical and laboratory haematology,
D M Ramsay, and
E P Robertson, and
E MacArthur
November 1978,
The Medical journal of Australia,
D M Ramsay, and
E P Robertson, and
E MacArthur
October 1991,
Revista medica de Chile,
D M Ramsay, and
E P Robertson, and
E MacArthur
June 1956,
Transactions of the Royal Society of Canada. Sections 1, 2, and 3 = Memoires de la Societe royale du Canada. Sections 1, 2, et 3,
D M Ramsay, and
E P Robertson, and
E MacArthur
February 1977,
Blut,
D M Ramsay, and
E P Robertson, and
E MacArthur
August 1993,
Circulation,
