2140nm holmium laser lithotripsy filter glass

The wavelength of holmium laser is 2.1um, which is at the absorption peak of water. The laser energy is efficiently absorbed by the water in the stones and tissues, achieving the dual functions of stone crushing and cutting. Since the penetration depth of holmium laser in tissue is less than 0.4mm, it can perform precise cutting without damaging surrounding tissues. Holmium laser is widely used in urology and can be applied to dermatology, obstetrics and gynecology, gastroenterology, general surgery, ENT and other fields.

The stone crushing effect of holmium laser on stones is mainly through a "drilling effect", whereby the stones are "vaporized" to form fine stone dust. Holmium laser is emitted in pulses with an emission time of 0.25 s. The instantaneous power can reach 10 kW, which is enough to crush stones of various compositions and densities. Its tissue penetration depth is <0.5 mm, tissue damage is slight, scars are not easily formed, and urinary tract stenosis will not occur after surgery.

Holmium laser can be transmitted through optical fiber, so it can be used in conjunction with various endoscopes for minimally invasive surgical treatment. It is favored by clinical experts for its characteristics of small damage to surrounding normal tissues, fast postoperative recovery, good hemostasis, and stone powderization, and has become the gold standard for urinary tract lithotripsy.

It is mainly used for the treatment of urinary tract stones under endoscopy, such as: kidney stones, ureteral stones, ureteral and urethral stricture cutting, polyp-wrapped stones, bladder stones, bladder tumors, etc.

Holmium laser lithotripsy is completed with the help of an optical fiber into the body with the assistance of an endoscope. It belongs to intracavitary lithotripsy. Holmium laser can crush urinary stones of any part and any composition into powder with its unique and efficient lithotripsy method. It is a "new weapon" for the treatment of urinary tract stones that is efficient, safe, low-cost, time-saving, and has extremely low side effects. It can be called a real "sniper" for urinary stones.

The energy generated by the holmium laser can vaporize the water between the end of the optical fiber and the stone, forming tiny cavitation bubbles, and transmit energy to the stone, crushing the stone into powder. Water absorbs a lot of energy, reducing damage to surrounding tissues. At the same time, the penetration depth of holmium laser into human tissue is very shallow, so it causes minimal damage to surrounding tissues while crushing the stone, and is the safest. During the lithotripsy process, the stone rarely moves, and the backwash rate is very low, so the efficiency is greatly improved. It can be directly crushed by cystoscope, ureteroscope and percutaneous nephroscope without causing tissue damage. Moreover, the holmium laser fiber is bendable, and can be introduced not only through a rigid ureteroscope, but also through a soft ureteroscope for lithotripsy. Therefore, it can effectively treat ureteral stones and kidney stones in any part. Using holmium laser to treat bladder stones is even easier, just like a fish in water. You only need to introduce the holmium laser fiber through the working channel of the cystoscope, and all the stones can be crushed in a snap, which is both safe and time-saving.