Klinisk Biokemi i Norden · 2 2016
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Table 4a shows how many samples fulfill the demand
on allowed deviation. All listed parameters fulfill the
demand on allowed deviation for the second transport
and only (B) Erythr – MCV and B – Hematocrit does
not fulfill the demands on first transport next day.
Discussion
This paper describes a continuation of the investiga-
tion of stability of blood samples during transport
described in the paper
Stability of heparin blood samp-
les during transport based on defined pre – analytical
quality goals
(1). This investigation has the purpose of
examining if the chosen components can be transpor-
ted as blood samples without any preparation from
GPs to laboratory of the hospital with the established
transport system by courier twice a day.
None of the results from Calcium-ion (pH
7.4) exceed the allowable deviation. This may be
expected if the actual pH was within 7.2 – 7.6 while
the corrected result of Calcium-ion to pH 7.4 can be
calculated. The pH results which were measured at
the same time showed a continuous decrease from
the “0 – sample” to tube 5 due to the degradation
of glucose. No pH value was below pH 7.2. Prostate
antigen was apparently not affected in the pre-ana-
lytical phase and all tubes fulfilled the demands.
For Parathyroid hormone 93.1 % of tube 4 ful-
filled the demands, where app. 98 % of tube 2, 3
and 5 fulfilled the demands. Proinsulin-C-peptide
was not stable at all and only up to 76 % of tube 2
fulfilled the demands and after one day only 2 %
fulfilled if the samples did not undergo any prepa-
ration. For tube 5 which were centrifuged within 45
– 60 min after the blood was drawn and stored in
the thermostated box to the next day before trans-
portation to the laboratory only 56 % fulfilled the
