Does the Use of Viscoelastic Hemostatic Assays for Periprocedural Hemostasis Management in Liver Disease Improve Clinical Outcomes?

Routine hemostasis parameters such as prothrombin time and fibrinogen are frequently abnormal in patients with chronic liver disease and have been demonstrated to be poor predictors for periprocedural bleeding. Alterations in procoagulant and anticoagulant factors in this population result in a state of rebalanced hemostasis, which is not reflected by routine hemostatic measures. Viscoelastic hemostatic assays (VHA) present a point of care measure of global hemostasis with an emerging role in guiding transfusion in the liver transplant setting. The potential role for VHA in guiding periprocedural transfusion is unknown. Here we critically appraise the available limited evidence on the use of VHA to guide prophylactic treatment in patients with cirrhosis undergoing procedures. We assess whether the impact of a VHA-guided approach improves clinical outcomes. Suggested areas for future research with a focus on clinically relevant outcomes, particularly periprocedural bleeding, are highlighted.

Sagittal sinus thrombosis with subarachnoid haemorrhage in a patient with COVID-19 infection.

A man in his late 50s was admitted with a 10-day history of right frontotemporal headache, left arm and leg weakness, and a sudden decline in visual acuity in the right eye. The patient had recent exposure to COVID-19 infection and tested positive for the same on admission. A CT scan of the head done on arrival demonstrated a subarachnoid haemorrhage in the right central sulcus with an underlying superior sagittal sinus thrombosis. No other known risk factors for central venous sinus thrombosis could be identified. The patient had a normal level of consciousness on admission clinically; however, he was in severe pain. A collective decision was made to administer anticoagulants to the patient with heparin after carefully deliberating the risk-to-benefit ratio of a superior sagittal thrombus with an associated subarachnoid haemorrhage. Our patient recovered and was discharged after 2 weeks on warfarin. We present this case to highlight the potential risks of hypercoagulable and neurotropic complications of COVID-19 infections, with special emphasis on cerebral venous thrombosis.

Reducing delays to administration of prothrombin complex concentrate in patients with vitamin K antagonist-related intracerebral haemorrhage.

BACKGROUND/AIMS: Four-factor prothrombin complex concentrate is the first-line treatment in vitamin K antagonist-related intracerebral haemorrhage. Early administration is associated with improved patient outcomes. A quality improvement project investigated delays in prothrombin complex concentrate administration in vitamin K antagonist-related intracerebral haemorrhage in order to reduce the time from computed tomography scan confirming intracerebral haemorrhage to prothrombin complex concentrate administration (scan-to-needle time). METHOD: Twenty patients were identified by retrospective audit over a 3-year period. The median scan-to-needle time for prothrombin complex concentrate was 156 minutes. Several points of delay were identified, including contacting both haematology and transfusion departments for prothrombin complex concentrate dosing and dispensing. Following this audit, interventions were brought in which included the introduction of a protocol with a prothrombin complex concentrate dosing algorithm, negating the need to contact haematology before administration. A dedicated supply of prothrombin complex concentrate was given to the stroke unit avoiding the need to contact the transfusion service. RESULTS: A re-audit showed a 68% reduction in median scan-to-needle time from 156 minutes to 49 minutes. Prospective data collection is ongoing.