Summary
The many possibilities for anticoagulant pharmacotherapy are constantly increasing.
Anaesthetists and pain therapists are confronted with patients being treated with
highly effective anticoagulants and/or platelet aggregation inhibitors for coronary
heart disease, stroke or peripheral arterial occlusive disease. These patients in
particular benefit from neuraxial blockade when undergoing cardiac surgery, revascularisation
procedures or amputation. The anaesthetist needs to be familiar with the pharmacology,
indications, and adverse effects of the various anti- and procoagulant substances,
and to integrate this knowledge into the management concept to prevent haemorrhagic
complications.
This review presents the basics of coagulation, sites of action of currently-used
anticoagulants, and the Austrian standards for performing modern central and peripheral
nerve blocks in patients on antithrombotic medication. Preoperative assessment of
existing anticoagulant therapy is also very important in general anaesthesia, as this
can be used to determine the appropriate procedures for perioperative coagulation
management. In order to prevent bleeding complications in patients on antithrombotic
therapy, the following questions are addressed and appropriate recommendations given:
intervals between administering anticoagulant agents and puncture/removal of catheters
or a general anaesthesia and surgery; the choice of local or regional anaesthetic
method and of intraoperative coagulation analysis; reversal of anticoagulation in
acute situations.
Keywords
Anticoagulation - bleeding - clotting - general anaesthesia - local and regional anaesthesia