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Percutaneous transhepatic gallbladder aspiration (PTGBA) procedure. a Under ultrasound guidance, the gallbladder is punctured transhepatically by a needle with a mandolin. The mandolin is then removed. b Real-time ultrasound image: the needle tip is confirmed as a high-echoic spot in the gallbladder, revealing successful puncture under real-time ultrasound guidance. c The mandolin is removed, and bile is aspirated. d After sufficient aspiration of bile, the needle is withdrawn
