Tungsten needle can be used as the conventional ablation electrode for applications of minimally invasive surgery is made of tungsten material with ultra-high melting point. Its tip is super sharp and can withstand high temperature above 3400 °C. The classic design of the tungsten needle with a bare 3 mm tip effectively avoids accidental thermal damage to the surrounding tissue, and the incision is more minimally invasive and more prone to clotting, thereby it is more conducive to the patient's postoperative wound healing.

Tungsten needle is an environmentally friendly and non-toxic consumable on medical high-frequency electric knife. The high-frequency current generated by the electric knife is used to cut and coagulate human tissues. Specifically, the high-frequency current forms high temperature, thermal energy, and discharge at the tip of the tungsten needle of the electric knife, which quickly dehydrates, decomposes, evaporates, and coagulates the blood of the contacted tissue to achieve the function of decomposing the tissue and clotting, thereby achieving the purpose of cutting and stopping bleeding. This tungsten needle electrode high-frequency electric knife is suitable for various types of surgical operating rooms such as orthopedics, pediatrics, cardiothoracic surgery, neurosurgery, and urology.

Tungsten needle is a consumable of high frequency electric knife. Tungsten needle has an ultra-sharp needle point for precise cutting. Also, it has high melting point to withstand high temperatures above 3000 °C. So, such an electric knife is suitable for plastic surgery, neurosurgery, oral surgery, pediatric surgery, cardiothoracic surgery, and many other minimally invasive surgery. And the patients will recover relatively quickly as surgical wound is small.

How to prepare tungsten needle by electrolytic method? The following materials are needed:

How to prepare tungsten needle? You should prepare the following materials at first:

Ultrathin tungsten needle has advantages of high hardness and strong ductility. Also, it is not easy to break with durability. The diameter of tip of tungsten needle can reach micron level, which can be used to dissect and separate individual human cells, such as inner ear labyrinth cells. Some experts use 0.32mm tungsten wire to prepare ultrathin tungsten needles. They pre-machined the tips of fine tungsten wire blanks into needle-shaped, sickle-shaped, or hook-shaped needles. The diameter of the tip of these tungsten needles is generally 3 to 10 μm, and the smallest diameter can reach 1.5 μm.

Tungsten needle is an elongated tungsten product made of pure tungsten or tungsten alloy, having the advantages of high temperature resistance, high hardness, and good conductivity. Tungsten needle can be used as an electrode material for argon arc welding (the fastest growing and most widely used welding technology at home and abroad), as a probe needle for detecting instrument, or as a dissection needle for various minimally invasive surgery.

Tungsten heavy alloy is also called tungsten alloy. The main component of tungsten alloy can be W-Ni-Fe, W-Ni-Cu or W-Ni-Cu-Fe, among which other metals such as cobalt, molybdenum, and chromium can also be added. The density of tungsten heavy alloy is twice that of steel, and 1.5 times of lead (conventional radiation shielding material). Moreover, tungsten alloy is an environmentally friendly material, which is non-toxic and pollution-free, so it is more suitable for collimator applications as a radiation protection material than heavy metal lead.

Tungsten alloy is a safe and reliable radiation shielding material that can replace the traditional radiation shielding material lead for parallel-hole collimator - the most commonly used collimator for stationary SPECT imaging in hospitals. As a new type of radiation shielding material, tungsten alloy has many advantages such as high strength, good processability, no secondary bremsstrahlung radiation, and environmental protection for applications of parallel-hole collimator. Also, the thickness of tungsten alloy is only 2/3 of lead to obtain the same shielding effect. Wherein, SPECT is the short for single photon emission computed tomography.

Tungsten alloy collimator is also known as tungsten heavy alloy collimator or high-density tungsten alloy collimator. Collimator is a key component of gamma camera - the most basic imaging equipment in nuclear medicine, and affects the imaging quality. So, it is very important to choose the raw material of collimator. Tungsten alloy has good absorption and shielding performance to 60Co, 137Cs and other strong gamma ray sources, and therefore, it is regarded as the best shielding material for collimators. And tungsten alloy collimator can prevent γ-ray omission from causing permanent harm to medical workers, patients and their family members.