Indications 1. 3-7 days after menstruation and no infection in the genitalia and pelvis. 2.Bilateral or unilateral obstruction of the interstitial part, narrow part, and proximal part of the jugular abdomen of the fallopian tubes, and obstruction of the fallopian tubes; 3.Conventional hysterosalpingography is feasible if the imaging operation cannot be completed because the cervical opening is too loose; 4.Bilateral or unilateral obstruction of the fallopian tubes, too thin or twisted, mainly using catheter dilation followed by insertion of drugs through the catheter to reach the lesion to reduce the degree of obstruction; 5.Tubal For pregnancy, the catheter is inserted into the pregnant side of the fallopian tube and the corresponding drug is injected to inactivate the embryo, terminate the pregnancy and treat ectopic pregnancy. Contraindications 1.Acute or subacute inflammation of internal and external genital organs or chronic inflammation; 2.Serious systemic diseases that cannot tolerate surgery; 3.Pregnancy, menstruation; 4.Postpartum, miscarriage, scraping within 6 weeks; 5.Distal tubal abdomen and umbilical blockage are not suitable for recanalization by guidewire; 6.Severe occlusion of uterine horn, recanalization after tubal anastomosis and recanalization, and those diagnosed with The guidewire should not be used for tubal recanalization in cases of tubal obstruction.