Yu Songyuan's title: Chief Physician Hospital: Wuhan Medical Treatment Center Department: Ultrasonic Interventional Department The principle of ultrasonic interventional therapy for chocolate cyst Under the direct monitoring of color Doppler ultrasound, we avoided the great blood vessels, punctured the cyst with a special needle, drained the fluid in the cyst, washed it clean, and injected sclerosing agents such as anhydrous alcohol, so that ectopic endometrial cells on the cyst wall would coagulate and die, so as to avoid bleeding to form chocolate-like cystic fluid every menstrual cycle and make the cyst wall adhere and close. If endocrine drugs are injected, the principle is to inhibit ovulation, which also inhibits the bleeding of endometrial cells, and the capsule wall adheres and absorbs for a long time. This kind of cyst wall itself is wrapped by peritoneum, and there is no other tissue, so there will be no other harm in the abdominal cavity. [Details] There are two ways to puncture the chocolate cyst by ultrasound intervention. One way is to puncture the needle from the vagina. This method needs to expose the perineum, which is inconvenient for the patient, but the image is clear and there is no need for anesthesia. Another method is to insert the needle from the abdominal wall, which has strong stability and is convenient for doctors to operate. [Details] Advantages of ultrasound interventional therapy for chocolate cyst