Magnetic resonance compatible puncture needle

Abstract

The invention relates to a magnetic resonance compatible puncture needle which comprises an outer needle and an inner needle, wherein the inner needle is embedded in the outer needle, the outer needle is made of pure titanium, and the inner needle is made of titanium alloy, the outer needle comprises an outer needle handle and an outer sleeve needle connected to the outer needle handle, the inner needle comprises an inner needle handle and an inner needle core connected to the inner needle, the outer needle handle is provided with a notch, and the outer sleeve needle is provided with a middle hole communicated with the notch, and the outside diameter of the outer sleeve needle is less than the inside diameter of the notch; the inner needle handle comprises an outer end part and a needle fixing part connected to the outer end part, the needle fixing part is used for mounting the inner needle core, the outside diameter of the inner needle core is less than the inside diameter of the middle hole of the outer sleeve needle, the outer end part is abutted with the end part of the outer needle handle; the magnetic resonance compatible puncture needle also comprises a diamagetism layer arranged on the outer sleeve needle. The magnetic resonance compatible puncture needle reduces the size of the puncture needle under magnetic resonance imaging and is convenient for better judging the position of the puncture needle.

Description

【Technical field】 [0001] The invention relates to a medical device, in particular to a magnetic resonance compatible puncture needle. 【Background technique】 [0002] The puncture needle is the most basic interventional device, which can be used to directly penetrate into the tumor or cyst cavity for diagnosis and treatment such as suction, flushing, drainage, biopsy or ablation; it can also be used to open the channel of the skin and blood vessels or the brain, bile duct, Urinary tract, stomach, abscess cavity and cyst cavity and other tissues, and then guide wire, catheter, drainage tube, etc. are introduced for treatment. Traditional puncture needles are widely used in the medical field, but their application in MRI-guided intervention is limited. Magnetic resonance guided intervention refers to the use of percutaneous puncture technology and catheter technology to treat some diseases or obtain histology, bacteriology, physiology and Biochemical materials to clarify the ...

AI Technical Summary

Problems solved by technology

Puncture needles made of traditional stainless steel materials will be subjected to huge magnetic force and moment and cannot be used

However, although the puncture needle of the new low magnetic susceptibility material is subjected to a small magnetic field force and torque, there are artifacts in imaging, and the artifacts increase with the increase of the field strength.

Excessive artifacts will directly affect the surgeon's judgment on the position of the needle tip, thereby affecting surgical treatment

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