The Nationally Innovative Medical Device, Nd:YAG Laser Has Officially Been Approved By NMPA
Category:
Domestic News
Published time:
2026-04-20
Recently, the Nd:YAG laser independently developed by King Laser was officially approved by NMPA. It is indicated for laser lithotripsy procedures under endoscopy in the urinary and biliary systems. The device provides a new option for the treatment of intracavitary stones.
Innovative Pulse Modulation Technology Obtain International Patents
This product employs patented laser modulation technology to precisely control pulse repetition frequency and width, resulting in more stable output pulses. The clinical value of this technological approach lies in the ability to achieve more precise and stable laser output, thereby better ensuring the safety and efficacy of treatment. The approval of this product for market fills the gap in the application of this technology in China, making it an innovative product.
Breaking Through Traditional Diagnosis and Treatment, Enhancing Clinical Safety
In current clinical laser lithotripsy, treatments represented by the holmium laser still face several problems. First, intraoperative incision injury is prone to occur, requiring a clear surgical field and keeping the fiber tip away from surrounding tissues. Common causes of poor intraoperative visibility include inadequate inflow or outflow of irrigation fluid, bleeding, excessive stone debris or infectious material. The cause should be promptly identified and corrected during the procedure. Second, thermal injury may lead to ureteral stricture, which is a rare but serious complication after ureteroscopic holmium laser lithotripsy. Relevant studies have shown that the incidence of ureteral stricture following holmium laser lithotripsy for ureteral stones is relatively higher than that following pneumatic lithotripsy. This is mainly because if the heat generated during laser fragmentation cannot be promptly carried away by irrigation fluid, local heat accumulation occurs, raising the temperature and easily causing ureteral thermal injury and long-term ureteral stricture. Therefore, how to effectively control thermal diffusion while achieving efficient stone fragmentation, maintain continuous and adequate irrigation, and perform precise operation under a consistently clear visual field is a prominent challenge currently facing holmium laser lithotripsy technology.
In contrast, the Nd:YAG laser developed by King Laser adopts a differentiated stone fragmentation mechanism based on photomechanical principles. Under high fluence laser irradiation, atoms volatilized from the stone surface are ionized by high-energy laser, rapidly forming plasma. The plasma absorbs subsequent laser energy, quickly expands and collapses, generating shock waves and micro-jets that effectively fragment the stones. This device achieves a high peak power of 1×10⁵ W with only a modest energy level of a few hundred millijoules. Even with direct irradiation of soft tissue, it is unlikely to cause damage, representing a 'cold laser' lithotripsy solution that is well-recognized in clinical practice
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