The treatment effect of ADRCs on abdominal aortic aneurysm progression. (a) Representative examples of ultrasound scans of AAA measurements in the control group and ADRC treatment group prior to surgery and 7 days, 14 days, 21 days, and 28 days post-surgery. C: Circumference (green circle), mm; A: area of green circle mm2; d1: inner to inner diameter (yellow 1+: mm); d2: Diameter (mm). (b) Percentage increase of AAA after initiating AAA till 28 days after treatment in the control group (n = 17) and the ADRC treatment group (n = 15), as well as percentage increase of suprarenal aorta in the control group (n = 17) and the suprarenal aorta in the ADRC treatment group (n = 15). Values are presented as mean ± standard deviation.