Thigh pillow for sitting after Brazilian butt lift cutting off circulation to butt?

I'm a week out from having Brazilian butt lift surgery, and was given a thigh pillow by my doctor to sit on afterwards. My question is whether the thigh pillow would potentially cut off some blood circulation to the butt area? It seems like it puts a fair amount of force/weight on the thighs. So I've mainly tried to stay on my stomach. Any thoughts on whether the pillow could have a negative effect on circulation and the outcome of surgery (though less negative than regular sitting obviously)?

No doctor answers yet