The principle of the umbilical cord clamp is to mechanically compress and block the blood flow of the umbilical cord, ensuring rapid closure of the umbilical cord after separation from the mother, preventing bleeding and infection.

1. Clasping the umbilical cord: After delivery, paramedics place the umbilical cord clamp on the end near the newborn‘s abdomen to block blood flow within the umbilical cord by squeezing tightly.

2.  After tightening, the blood vessels in the umbilical cord (two arteries and one vein) are compressed, and the blood flow stops.

3. Cutting the umbilical cord: Cutting the umbilical cord on the outside of the pinched position to complete the separation of the newborn from the mother.

4. **Promoting Healing**: After tightening, the cord stump gradually dries up and falls off, forming the navel.