Regional Anaesthesia (or LP) In Patient on Antibthrombotics



Background

Below is a very brief summary of small portion of the Joint ESAIC/ESRA guidelines, 2022.

High risk (spinal/deep) blocks

Drug/Dose

Time from drug intake to intervention

Target lab value at intervention

VKA

Until target lab value INR normal

DXA low

24 h rivaroxaban, edoxaban (30 h if CrCl <30 ml/min), 36 h apixaban No testing

DXA high

72 h or until target laboratory value (until target laboratory value if CrCl <30 ml/min) DXA level <30 ng/ml (alternative: anti-Xa   0.1 IU/ml)

LMWH low < 50 IU anti-Xa/kg/day, enoxaparin  40mg/day

12 h (24 h if CrCl <30 ml/min) No testing

LMWH high

24 h (48 h if CrCl <30 ml/min) or until target lab value (especially if CrCl <30 ml/min) Anti-Xa ≤  0.1 IU/ml

UFH low
200 IU/kg/day SC
100 IU/kg/day IV

4 h No testing

UFH high

Until target lab value (6 hrs if IV, 12 h if CS) aPTT or anti-Xa or ACT in normal range

Aspirin low
<200mg/day

0 No testing

Aspirin high

3 days(in normal plts count) to 7 days Consider platelet fxn tests

P2Y12 inhibitor

5 days ticagrelor
5 to 7 days clopidogrel
7 days prasugrel
or until target laboratory value

Aspirin low + anticoagulant

Aspirin: 0
+ time interval of specific anticoagulant
Specific lab test for combined anticoagulant

Aspirin low and antiplatelet

Aspirin: 0 and time interval of specific antiplatelet drug Consider specific lab test for combined antiplatelet drug


Content by Dr Íomhar O' Sullivan. Last review Dr ÍOS 8/04/25.