The amniocentesis procedure involves sterilization, puncture, extraction of amniotic fluid, and pressure dressing.
Amniocentesis is a method of screening for disease by extracting amniotic fluid through a puncture needle that enters the amniotic cavity through the abdominal wall or uterine wall in the middle of pregnancy. There should be clear indications, such as suspicion of chromosomal diseases in the fetus, prenatal diagnosis such as high-age pregnant women and those who have no fetal malformation but excessive amniotic fluid.
1. Sterilization: after the pregnant woman empties her bladder, take the supine position and mark the puncture site, routinely disinfect the abdominal skin and lay a sterile cavity towel.
2. Puncture: Use a 22-gauge or 20-gauge lumbar puncture needle to vertically insert the needle into the abdominal wall and uterine wall until it enters the amniotic cavity.
3. Extraction of amniotic fluid: after pulling out the needle core, amniotic fluid can be seen flowing out. After connecting the syringe to extract the required amount of amniotic fluid, insert the needle core into the puncture needle and pull out the needle quickly.
4. Pressure bandage: wrap the wound with a sterile dressing and apply pressure for 5 minutes and then fix it with adhesive tape.
Amniocentesis is an invasive operation, which must be performed by professional technicians, and the general condition of the pregnant woman, such as abdominal pain, should be closely monitored after the operation.