Contrast medium push-injector for intervention department

Abstract

The invention relates to the technical field of equipment for the intervention department, in particular to a contrast medium push-injector for the intervention department. The contrast medium push-injector comprises an injection mechanism penetrating through the side wall of a shell and a driving assembly for driving the injection mechanism to conduct injection; the injection mechanism comprisesan injection tube, an injection head and a pushing rod, the pushing rod is fixedly connected with the driving assembly, one end of the pushing rod is inserted in the injection tube and fixedly connected with a piston, an embedding groove is formed in the side, away from the pushing rod, of the piston, a movable plate is slidably installed in the embedding groove, a movable pillar connected with the movable plate is inserted in a cavity in the pushing rod and fixedly connected with a metal plate with a spring, and first contact switches electrically connected with the driving assembly are installed on the two side faces of the metal plate respectively. According to the contrast medium push-injector, the balance state of the two sides of the movable plate is maintained through elastic forceof the spring, when the pressure in the body of a patient is larger than elastic force of the spring, the movable plate moves, thus the circuit conducting state between the movable plate and the driving assembly is broken instantaneously, and safe injection of a contrast medium is achieved.

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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