Micro slow positioning injection device for rat brain experiments

Abstract

The invention discloses a micro slow positioning injection device for rat brain experiments. The micro slow positioning injection device comprises a support, a needle pushing mechanism and a needle core pushing mechanism; the support is formed by a bottom plate, retractable supporting columns and a top plate, a fixed platform is also slidably arranged on the bottom plate, and a clamping mechanismis slidably arranged on the fixed platform; the needle pushing mechanism comprises a screw rod, two screw sleeves, two connection rods, a first connection plate and a fixation mechanism, wherein the screw rod is fixedly arranged below the top plate, the screw sleeves are symmetrically arranged on the screw rod, the connection rods are hinged to the screw sleeves, the first connection plate is hinged to both the connection rods, and the fixation mechanism is arranged at the middle of the first connection plate and used for fixing a needle cylinder of an injector; the screw rod is composed of two integrated segments, but the spiral directions of screw threads of the two segments are reverse; the needle core pushing mechanism comprises a pushing boosting cylinder which penetrates through thetop plate and is slidably connected with the top plate, a toothed plate which is fixedly arranged at the top of the pushing boosting cylinder, and a gear which meshes with the toothed plate and can conduct self-locking, the gear is slidably arranged on the top plate, and a first handle and scale lines are arranged on the gear. The micro slow positioning injection device effectively avoids experiment errors caused by long-time manual fixation by a tester, and is reasonable in structure and convenient to operate.

Description

technical field [0001] The invention relates to a device for rat brain experiments, in particular to a micro-volume slow positioning injection device for rat brain experiments. Background technique [0002] Alzheimer's disease, also known as Alzheimer's disease, is a primary degenerative brain disease that occurs in old age and pre-senile age. Impairments in memory, thinking, analysis and judgment, visual-spatial recognition, emotion, etc.; including vascular dementia and dementia of brain nerve cell degeneration. In the research work of senile dementia, it is often necessary to establish animal senile dementia models similar to human senile dementia, so as to conduct medical research on the pathological mechanism and treatment of senile dementia. For example, establish rat models of senile dementia to study the pathogenesis of senile dementia, including cholinergic damage-induced dementia model, aging-induced dementia model, ABETA-induced dementia model, chronic cerebral i...

AI Technical Summary

Problems solved by technology

[0003] In the establishment process of the above-mentioned senile dementia rat model, most of them need to inject reagents into the rat brain to construct the model. The experiment failed due to the increase, and the injection reagent needs to be injected at an extremely slow speed

At the same time, during the entire injection process, the syringe cannot move, and after the injection is completed, the needle must be left until the liquid diffuses into the tissue, and then slowly withdraw the needle to prevent the liquid from overflowing with the injection needle

However, it is difficult to perform such an injection by maintaining a posture for a long time.

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