Technical scheme of laparoscopic trocar

The casing sealing cap mounting base is provided with a mounting column and a mounting hole for installing the casing elastic sealing cap. The locking fixed cover is provided with an installation locking column and an installation locking hole for installing the elastic sealing cap of the locking sleeve. The lower gland is provided with an installation pressing column and a support ring, which are used to support the shaped casing elastic sealing cap. The gas seal cap adopts a conical seal cap, which is made of elastic soft material and is gas seal. An air injection valve is installed on one side of the puncture casing seat, which is equipped with an air injection switch, an air inlet and an exhaust port. The air injection valve is connected with the air source through a pipe. During the operation, the air is injected into the cavity of the punctured surgical patient through the air injection valve to form an pneumoperitoneum, which is convenient for the operation. The outer side of the puncture sleeve is provided with a ventilation groove, which extends forward to the front of the puncture sleeve along the axial direction of the puncture tube and passes through the wire binding groove.

Two wire binding grooves are arranged around the front end of the puncture sleeve. A one-way valve is installed at the lower part of the puncture casing seat, and the air outlet of the one-way valve is connected with the ventilation groove outside the puncture tube. The sealing gland of the sealing patch is on the outside of the ventilation groove of the puncture sleeve, and an air transmission groove is arranged on the inside of the sealing patch, so that the ventilation groove forms a gas transmission channel. One end of the sealing patch is provided with a fixing block inserted and fixed at the bottom of the one-way valve, and the other end of the sealing patch is provided with a wiring groove and an air outlet corresponding to the front end of the puncture tube, which is convenient for wiring and fixing the airbag, and supplies air to the airbag through the air outlet. The sealing patch is pasted or the sealing gland is ultrasonically welded on the outside of the ventilation groove of the puncture sleeve, so that the ventilation groove forms a gas transmission channel. The air bag is installed at the front end of the puncture sleeve and fixed on the periphery of the binding groove by binding. The air outlet arranged by the sealing patch transmits compressed air to the air bag and inflates the air bag. The positioning ring is sleeved in the middle of the puncture sleeve. During the operation, when the puncture sleeve is inserted into the patient's cavity, the one-way valve inflates the air bag through the ventilation groove and the air outlet hole on the ventilation seal.

After the air bag is full of air, adjust the position of the positioning ring, clamp the puncture device on the patient's cavity tissue through the positioning ring and air bag sleeved on the puncture sleeve, and will not shake, which is convenient for surgical instruments to perform surgery. When the operation is completed, close the gas injection valve, open the gas injection switch, inflate the cavity, and then press the valve core of the one-way inflation valve to discharge the gas filled in the airbag, and then take out the puncture sleeve from the cavity wall of the patient. The one-way valve is a one-way gas injection valve. The one-way valve has a valve body, a valve seat, a valve core, a sealing ring and a spring. The sealing ring is installed on the valve core, and the spring presses the sealing ring of the valve core against the valve seat of the valve body to realize one-way sealing. The air inlet of the valve body is connected with the gas injection pipe and the compressed air source. The air bag is made of elastic soft film material. The locating ring is made of elastic soft material.