(Microsoft PowerPoint ...

Prop I - 1. Salzburger Präanästhesieforum,
11.-12. Dez. 2009
Value of preoperative PT/PTT
as a predictor of postoperative hemorrhage
in pediatric patients undergoing tonsillectomy
Howells. Otolaryngol Head Neck Surg 1997 Dec;117
Preoperative PT/PTT provides no additional information
than does a bleeding history for the general pediatric population undergoing
tonsillectomy.
Preoperative PT/PTT should only be done in selective cases where warranted
by history.
A practical concept
for preoperative indentification of patients
with impaired primary hemostasis
Koscielny. Clin Appl Thromb Hemost 2004;10:155
� 5649 unselected adult patients
� standardised questionnaire for bleeding
� „routine panel“:
� aPTT, PT, PC, PFA-100
� second level tests:
� BT, vWF:Ag
Sibylle Kozek-Langenecker, Präoperative
Gerinnungsabklärung 19
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