The application of tungsten-nickel-iron alloy in micro-counterweights for interventional therapy gives full play to its characteristics of high density and small volume, providing a key guarantee for the precise operation of interventional therapy. Interventional therapy is a minimally invasive surgery performed through instruments such as catheters and guide wires in human blood vessels or lumens, which has extremely high requirements for the positioning accuracy of the instruments, and micro-counterweights are one of the core components to achieve this accuracy. The high density of tungsten-nickel-iron alloy enables it to provide sufficient weight under miniaturized design. By changing the position and quantity of counterweights on the catheter or guide wire, the center of gravity of the instrument can be precisely adjusted, making it maintain a stable movement trajectory under the influence of blood flow or human physiological activities and smoothly reach the treatment site.
These micro-counterweights are usually designed into small balls, thin slices or ring-shaped structures with a diameter of only a few millimeters. Using tungsten-nickel-iron alloy to manufacture them not only meets the size requirements, but also its excellent processing performance can ensure the surface smoothness of the counterweights, avoiding damage to blood vessel walls or lumen tissues. At the same time, the alloy has good biocompatibility. After surface passivation treatment, it can reduce adverse reactions with blood or human tissues, reduce the risk of thrombosis or inflammatory reactions, and ensure the safety of treatment.
In specific treatments, such as cardiovascular interventional surgery, catheters with tungsten-nickel-iron alloy counterweights can more accurately reach the stenotic part of the coronary artery, assisting balloon dilation or stent implantation; in tumor interventional therapy, counterweights can help microcatheters accurately locate tumor-feeding blood vessels, improving the efficiency of drug perfusion or embolization therapy. In addition, in the field of neurointervention, micro-guide wires used to treat cerebrovascular diseases, by matching with the alloy counterweights, can flexibly shuttle through the complex cerebrovascular network and accurately reach the lesion, providing safer and more efficient treatment for patients.
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