Table 2.

Variability in PRP preparation methods across studies

Study	Number of centrifugation steps	Speed and times	Collected volume of blood (ml)	Volume of ACD-A mixed (ml)	Volume of PRP obtained (ml)	Volume of PRP infusion (ml)
Chang et al. 2015[19]	2	200 g 10 min 500 g 10 min	15	5	0.5–1	0.5–1
Nazari et al. 2017/2019[34, 37]	2	1200 rpm 12 min 3300 rpm 7 min	17.5	2.5	/	0.5
Tandulwadkar et al. 2017 [38]	2	200 g 15 min 600 g 6 min	10	/	0.5–0.8	0.5–0.8
Eftekhar et al. 2018 [20]	2	1600 g 10 min 3500 g 5 min	8.5	1.5	1.5	0.5–1
Kim et al. 2019 [36]	1	1017 g 3 min	18	2	0.7–1	0.7–1
Agarwal et al. 2020 [39]	1	3600 g 6 min *shake upside down 20 times for homogenization	8	/	/	4
Mehrafza, et al. 2019 [5]	/	/	8.5	1.5	1.5	1

ACD-A acid citrate dextrose solution A