How thick is the needle used in IVF surgery?

There is a certain difference between the thickness of the egg retrieval needle and the type of egg retrieval needle. The specifications of clinical oocyte retrieval needles mainly include 16G, 17G, 18G, 19G, 20G and 21G. It is understood that the caliber of 17G is 1.3665 mm, and the diameter of 18G is 1.2141 mm, so the thickest 16G is within 1.5 mm at most. At present, there are three types of egg retrieval needles commonly used by doctors: 17G, 18G and 19G. The larger the model, the thinner the tube diameter. The length of the egg retrieval needle is about 35 cm. The selection of the puncture needle depends on the number of follicles and the puncture of the ovary. Difficulty and other factors. The larger the diameter of the puncture needle, the greater the risk of puncture injury and the greater the pain of the patient.

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