Surgical method of negative pressure aspiration for artificial abortion

The preoperative preparation for negative pressure aspiration for artificial abortion includes: ① Detailed medical history, general and gynecological examinations. ② Urine HCG measurement and ultrasound examination for confirmation. ② Laboratory examinations including vaginal secretion routine, blood routine and coagulation tests. ④ Preoperative measurement of body temperature, pulse and blood pressure. ⑤ Relieve the patient's mental concerns. ⑥ Empty the bladder.

Surgical steps and methods

(1) The patient takes the lithotomy position. Routinely disinfect the vulva and vagina and lay a disinfectant towel.

(2) Perform a bimanual examination to check the position, size, and appendages of the uterus.

(3) Use a vaginal speculum to dilate the vagina, disinfect the vagina and cervical canal, and clamp the anterior lip of the cervix with a cervical forceps.

(5) Dilation of the cervical canal: The dilated cervix should be one size larger than the diameter of the straw. That is, if a No. 6 straw is used, the cervix should be dilated to No. 7.

(6) Choice of straw: Use No. 5 straw for pregnancy below 6 weeks, No. 6 straw for pregnancy below 7 weeks, No. 6 or 7 straw for pregnancy between 7 and 8 weeks, No. 7 straw for pregnancy between 8 and 9 weeks, No. 7 or 8 straw for pregnancy between 9 and 10 weeks, and No. 8 straw for pregnancy above 10 weeks.

(7) Uterine suction: Connect the suction tube to the rubber hose and the negative pressure bottle, and insert the suction tube into the fundus of the uterus and then withdraw it slightly. The negative pressure is between 300 and 500 mmHg. The suction tube is drawn from the fundus of the uterus to the cervix. The following signs are: the uterine wall becomes rough, the uterus contracts so that there is a tight feeling when it is twitching, bloody foam is discharged from the cervix, and there is no active uterine bleeding.

(8) After aspiration, measure the depth of the uterine cavity again and use a small scraper or a small suction tube to clean the two corners of the uterus to prevent incomplete aspiration.

(9) Check whether the aspirated material contains villi and embryonic tissue and whether it is consistent with the month of pregnancy. If there is any abnormality, it should be sent for pathological examination.

(10) Wipe away any bloody material from the vagina, check that there is no active bleeding from the cervical os, and then remove the cervical clamp and vaginal speculum.