Thromboelastography (TEG®) demonstrates that tinzaparin 4500 international units has no detectable anticoagulant activity after caesarean section

A thromboprophylactic dose of tinzaparin 4500 IU had little detectable effect on coagulation as assessed by TEG and anti-Xa assay. These findings support consensus guidelines which state that it is acceptable to perform neuraxial blockade or remove an epidural catheter 10-12 h after a thromboprophylactic dose of tinzaparin. Rather than suggesting a lack of anticoagulant activity, the findings indicate that TEG may not have the sensitivity to detect a tinzaparin effect when this dose is used in this patient group.