A contrast agent injector for interventional department

Abstract

The present invention relates to the technical field of interventional equipment, in particular to an interventional contrast medium injector, which includes an injection mechanism penetrating through the side wall of the casing and a driving assembly for driving the injection mechanism to perform injection; the injection mechanism includes an injection tube , the injection head and the push rod, the push rod is fixedly connected with the driving assembly, and one end of the push rod is inserted into the injection tube and fixedly connected with the piston, and the side of the piston away from the push rod is provided with an embedded groove, and the embedded groove A movable plate is slidably installed, and the movable column connected with the movable plate is inserted into the cavity on the push rod and fixedly connected with the metal plate connected with the spring, and the two sides of the metal plate are respectively equipped with a First contact switch. The elastic force of the spring is used to maintain the balance state on both sides of the movable plate. When the pressure in the patient’s body is greater than the elastic force of the spring, the movable plate moves to instantly disconnect the circuit conduction state with the driving component, and realize the safe injection of contrast agent.

Description

technical field [0001] The invention relates to the technical field of interventional equipment, in particular to an interventional contrast agent injection device. Background technique [0002] When performing retrograde pyelography, urethrography, and cholangiography, etc., it is necessary to inject contrast medium into the patient's body. Contrast agents are chemicals injected into human tissues or organs to enhance image viewing. The density of these chemicals is higher or lower than that of the surrounding tissue, which creates a contrast with the surrounding tissue, and the contrasting image can be displayed by some devices. [0003] At present, the commonly used bolus injection method is that the doctor injects the contrast agent into the patient's body under the irradiation of the X-ray machine. Long-term exposure to radiation will obviously damage the doctor's health. Therefore, relevant scholars have designed a contrast agent injector , but when using this type o...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used bolus injection method is that the doctor injects the contrast agent into the patient's body under the irradiation of the X-ray machine. Long-term exposure to radiation will obviously damage the doctor's health. Therefore, relevant scholars have designed a contrast agent injector , but when using this type of contrast agent injector, the pressure change in the patient’s body cannot be sensed in real time, so the speed of injection and the amount of contrast agent injected cannot be well controlled. There are potential safety hazards in special cases, such as : The patient has biliary tract obstruction, which cannot be distinguished before angiography. If the contrast agent is still injected into the patient’s body with mechanical thrust, the total amount of fluid in the biliary tract will increase and cannot be discharged normally, and the pressure in the biliary tract will rise sharply. Damage to the vessel wall or tissue and unnecessary pain to the patient

[0004] Existing patents use the function of pressure sensors to realize pressure detection, which is costly and requires high environmental requirements and limitations through signal transmission.

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