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Table 1 Comparison of sampling techniques for different coagulation parameters: Vena cava puncture (VCP) vs tail cut (TC) as measured by Prothrombin Time (PT) and activated Partial Thromboplastin Time (aPTT) in plasma of untreated negative control mice

From: Systemic coagulation parameters in mice after treatment with vascular targeting agents

Assay:

PT mean (SD)

aPTT mean (SD)

number of samples not evaluable

number of samples analyzed

% of samples not evaluable

Sampling technique:

[s]

[% of standard]*

[s]

[n]

[n]

[%]

VCP 1:5

9.2 (1.0)

94 (10)

31.7 (4.6)

3

15

20%

VCP 1:10

7.8 (0.1)

116 (13)

23.2 (0.8)

0

10

0%

TC 1:5

-

-

-

3

3

100 %

TC 1:10

-

-

-

4

4

100 %

Ref.values:

8–10

80–120

32–36/23–25†

   
  1. * where the clotting time of a normal plasma standard was defined as 100%
  2. † normal values depended on citrate:blood ratio, and were 32–36 s for 1:5 ratio and 23–25 s for 1:10 ratio