Table 7.

Absolute platelet count on preoperative, operative and postoperative days.

Platelet count on days	Perimount Magna valve	Perceval valve	P value
Preoperative platelet count	244	239.8	=0.73
Operation day platelet count	158.6	144.6	=0.07
Postoperative day 1 platelet count	158.7	132.8	=0.0007
Postoperative day 2 platelet count	145.9	112.8	<0.0001
Postoperative day 3 platelet count	158.4	111.4	<0.0001
Postoperative day 4 platelet count	183.5	130.0	<0.0001
Postoperative day 5 platelet count	216.4	157.5	<0.0001
Postoperative day 6 platelet count	260.3	174.4	<0.0001
Postoperative day 7 platelet count	254.6	205.7	=0.23