Table 2.

Summary of recommendations for thromboprophylaxis in patients with COVID-19 without evidence of VTE.

Guidelines	ASH	NIH	ISTH
Last update [references]	January 2022 [31]	May 2022 [30]	July 2022 [32]
Non-hospitalized patients	Against	Against	Sulodexide 500LU twice daily for patients at higher risk of disease progression
Hospitalized, non-ICU patients, require low-flow oxygen	LMWH or UFH in therapeutic dose	LMWH or UFH in therapeutic dose	LMWH or UFH in therapeutic dose
ICU patients including those receiving high-flow oxygen	LMWH or UFH in prophylactic dose	LMWH or UFH in prophylactic dose	LMWH or UFH in prophylactic dose
Post- discharge	Against	Against	Rivaroxaban at a dose of 10 mg once daily in select patients