Cannula pull-over puncture needle and puncture method

Abstract

The invention discloses a cannula pull-over puncture needle. The cannula pull-over puncture needle includes a cannula needle, a cannula needle core and a sheath; the sheath movably sleeves a needle tube of the cannula needle; a needle inlet is formed in a side part of the front end of the sheath; the front of the cannula needle is aligned with the front end of the cannula needle core; and the length of the needle tube of the cannula needle is 3-5 cm longer than that of the sheath. The cannula pull-over puncture method includes the following steps: a, feeding the sheath into a uterine cavity from a vagina of a patient under the guidance of B B-scan ultrasonography; b, inserting the cannula needle and the cannula needle core into the sheath, and then allowing a needle point of the cannula needle to pass through the needle inlet of the sheath; and c, using the needle point of the cannula needle to puncture an amnion cavity, and then injecting a drug. The advantages of the cannula pull-over puncture needle are that the cannula pull-over puncture needle is reasonable in design, is easy to use, and is safe and reliable; the massive haemorrhage rate can be effectively decreased; operation risk of scarred uterus labor induction can be greatly decreased; and the success rate of conservative treatment can be effectively improved.

Description

technical field [0001] The present invention relates to the technical field of puncture needles and puncture methods, more specifically to the technical field of puncture needles and puncture methods for labor induction. Background technique [0002] In recent years, with the increase of the cesarean section rate of pregnant women, the number of re-pregnancy in the scarred uterus after cesarean section has also increased. The difficulty and risk are significantly higher than those of non-operated uterus. At present, the commonly used methods of terminating pregnancy are divided into surgical treatment and conservative treatment. Among them, the cost of surgical treatment is relatively high, the amount of blood loss during the operation is relatively large, and the patient is traumatized; the current conventional conservative treatment method includes curettage after interventional treatment. Treatment, curettage after drug treatment, traditional uterine cavity local punctur...

AI Technical Summary

Problems solved by technology

Interventional therapy plus drug therapy is to embolize blood vessels through interventional therapy to block the blood supply of pregnancy, and then inject drugs to kill the embryos and clear the uterus. This method has a high success rate of treatment, but the cost of hospitalization is high. Yuan

Drug therapy plus uterine curettage, that is, chemotherapy drugs (MTX) and other comprehensive treatments are used to kill the embryos and then evacuate the uterus. This method takes a long time to treat, has a low success rate, and has many side effects

The traditional puncture of the uterine cavity with medication and uterine curettage is to evacuate the uterus after traditional puncture with medication. This method, whether through abdominal puncture or uterine cavity puncture, is easy to puncture blood vessels due to the dense and complex blood vessels in the scar pregnancy, resulting in massive bleeding, resulting in conservative surgery. Surgical treatment for treatment failure

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