Oestrogens & VTE:-- Estrogen cause slight increase in
fibrinogen and by that promotes slightly
Of the contraceptive steroids we should remember that it is the estrogen
which causes hypercoagulable state and is primarily attributed for DVT and
allied thrombosis during OCP intake. The risk of VTE is directly related to
dose of E but the OCP induced risk of VTE IN PREGNANCY IS LOWER THAN THE RSIK
ASSOCIATED WIRH EVEN LOW-DOSE COC.
Inherited Thrombophilia:-
But as we know in some countries factor Leiden mutation, Protein-C /S synthesis
disorders (DEFICIENT PRODUCTION) or prothrombin mutation disorders are to the
extent of 0.5 to 5% of general population in those countries. In such countries
it will be prudent to screen women who candidates for inherited thrombophilias
and refrain from prescribing OCP if screen +ve or family is +ve/ or she herself
has already suffered from DVT in the recent past.. This is not true for our
country.
Acquired APC resistance:-
APC resistance :- APC naturally down regulates the thrombin formation.
APC therefore is a naturally occurring the prevalence of DVT in acquired APC
resistance is 6/10,000 women in reproductive years. Who are not.OCP? But if one
uses OVP then the prevalence goes up to Increased APC resistance can invite
thrombosis.
PCOS & Venous thrombosis:- using Thrombosis can occur at
varying sites including legs, thigh veins, lungs,
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