Consider the inflamatory process. Lets say a nail punctured your skin- there will be a brief vasoconstriction, then mast cells degranulate releasing histammine, prostaglandins, etc. Histamine is a major player in vasodiolation with the purpose of increasing blood flow to that LOCALIZED area-- with this increased flow includes clotting factors too.
So widespread vasocinstriction would indeed raise blood presure, but when localized to capilary bed wouldn't have any meaningful impact on BP.
ExtraVacation t1_itq4ejc wrote
Reply to How does vasoconstriction reduce blood pressure in haemostasis? by scoliendo
Consider the inflamatory process. Lets say a nail punctured your skin- there will be a brief vasoconstriction, then mast cells degranulate releasing histammine, prostaglandins, etc. Histamine is a major player in vasodiolation with the purpose of increasing blood flow to that LOCALIZED area-- with this increased flow includes clotting factors too. So widespread vasocinstriction would indeed raise blood presure, but when localized to capilary bed wouldn't have any meaningful impact on BP.