[Protein Z deficiency in unexplained affinity to thromboses, bleedings or abortions]

Area of Science:

• Hematology
• Coagulation disorders

Context:

• Protein Z deficiency is associated with an increased risk of venous and arterial thrombosis.
• It can also lead to mucosal bleeding, post-operative hematomas, and pregnancy complications like early abortions.
• Testing plasmatic concentration of protein Z is performed in patients with hemostasis disorders.

Purpose:

• To determine the prevalence of protein Z deficiency in patients tested at the Hämostaseologicum.
• To analyze the clinical manifestations and co-existing conditions in patients with diminished protein Z levels.

Summary:

• A study of 684 patients found 74 with protein Z deficiency and 45 with reduced levels due to anticoagulant medication.
• Among those with deficiency, lower levels (<1000 µg/l) were linked to a history of thrombosis (including stroke, DVT/PE, arterial thrombosis) and other conditions like hypertension and Factor V Leiden mutation.
• Marginally decreased levels (1000-1500 µg/l) were also associated with a history of thrombosis, hypertension, and Raynaud's phenomenon.

Impact:

• This study highlights the clinical significance of protein Z deficiency in thrombotic and hemorrhagic risk.
• Findings emphasize the importance of assessing protein Z levels in patients with recurrent thrombosis, bleeding issues, or pregnancy complications.
• Identifying protein Z deficiency aids in personalized risk assessment and management strategies for coagulation disorders.