Dr. med. Dirk Manski



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Partial thromboplastin time (PTT)

Screening test of the intrinsic plasmatic coagulation cascade, in particular factor I, II, V, VIII-XII. In addition, therapy with unfractionated heparin can be monitored with PTT. The effect of low molecular weight heparins is not detected by PTT.

Standard value:

Depending on reagent and laboratory 20–40 s.

Laboratory test method:

Ball coagulometer.

Indications:

Screening test for coagulation disorders, treatment with heparin.

Differential Diagnosis of Prolonged PTT

Differential Diagnosis of shortened PT

Activation of the coagulation system due to traumatic venipuncture or acute-phase-response.







Index: 1–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z





References

Guder, W. G. & Nolte, J.
Das Laborbuch für Klinik und Praxis
Urban + Fischer, 2009


Siegenthaler 1988 SIEGENTHALER, W. ; SIEGENTHALER, W. (Hrsg.):
Differentialdiagnose innerer Krankheiten.
Georg Thieme Verlag, Stuttgart, New York., 1988


  Deutsche Version: Gerinnungstest PTT