2.5. AVS Procedure
adrenal venous blood sample
Single-path AVS was performed by a skilled operator. (1) After disinfection and anesthesia, the middle right cubital vein was punctured and a 5F sheath was inserted. (2) An X-ray was performed on the patient anterior chest and an F-type MPA catheter (Cordis, USA) was inserted into the inferior vena cava to collect a 2 ml adrenal vein blood sample. (3) A 5F MPA catheter was inserted into the RAV and a small amount of contrast medium was injected to determine the location. A 2 mL adrenal venous blood sample was taken (Multipath AVS was performed by two skilled operators simultaneously. (1) The right cubital vein and right femoral vein were punctured after disinfection and anesthesia, and 5F sheaths were inserted, respectively. (2) An X-ray was performed on the patient anterior chest and an F-type MPA catheter (Cordis, USA) was inserted into the inferior vena cava to collect a 2 ml adrenal vein blood sample. (3) Operators simultaneously delivered the 5F MPA catheter (Cordis, USA) into bilateral adrenal veins, and then injected a small amount of contrast agent to determine the location (