I have had several pt/,ptt's with my blood draws and in ER for an unrelated reason. One checks the velocity of the blood and the other shows how long it takes you to stop bleeding. I do have on and off BP problems which I am on Lisinopril but it is mainly for my CKD also. Like I mentioned I take a baby aspirin and dietary things to also prevent stickiness of the platelets. I started eating some plant food as well and it brought my cholesterol and trigs down to almost text book numbers as my cardio said. I quit taking the COVID vacs because I read they raise the platelets also and could cause blood clots. But now it is all one day at a time and I still cringe when getting my cbc for the platelets reading but I have had four draws since going off HU and all have been norm my last result was 382. In two wks I will get my next draw and I am holding my breath already. My platelets were never real high at around 500+600 and once in my life they hit 700. Now they are 400-300's. Hope this helps your question. Janet