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(0.57-1.37)

Abbreviations. PT, prothrombin time; APTT, activated partial thromboplastin time; TCT, thrombin clotting time; VII, factor VIII procoagulant; vWF, von Willebrand's factor; PK, prekallikrein; HMW-K, high molecular weight kininogen; INR, international normalized ratio.

All factors except fibrinogen are expressed as units per milliliter (units/mL) where pooled plasma contains 1.0 unit/mL. All values are expressed as mean (M) followed by the lower and upper boundary (B) encompassing 95% of the population. Between 40 and 77 samples were assayed for each value for the newborn. Some measurements were skewed due to a disproportionate number of high values. The lower limit, which excludes the lower 2.5% of the population, has been given. From Andrew M. Bailliere's Clin Hematol 1991;4:251, with permission. aValues are indistinguishable from the adult.

Abbreviations. PT, prothrombin time; APTT, activated partial thromboplastin time; TCT, thrombin clotting time; VII, factor VIII procoagulant; vWF, von Willebrand's factor; PK, prekallikrein; HMW-K, high molecular weight kininogen; INR, international normalized ratio.

All factors except fibrinogen are expressed as units per milliliter (units/mL) where pooled plasma contains 1.0 unit/mL. All values are expressed as mean (M) followed by the lower and upper boundary (B) encompassing 95% of the population. Between 40 and 77 samples were assayed for each value for the newborn. Some measurements were skewed due to a disproportionate number of high values. The lower limit, which excludes the lower 2.5% of the population, has been given. From Andrew M. Bailliere's Clin Hematol 1991;4:251, with permission. aValues are indistinguishable from the adult.

Table A1-20. Reference Values for Coagulation Tests in Healthy Premature Infants (30-36 Weeks' Gestation) during First 6 Months of Life"

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