了解不同类型的手术激光器
手术激光器彻底改变了现代医学，为各个专业提供精准和微创的选择。 These advanced tools utilize concentrated light beams to cut, ablate, vaporize, or coagulate tissue, depending on their specific characteristics and how their energy interacts with biological matter. The effectiveness and application of a surgical laser are primarily determined by its wavelength, which dictates its absorption by different tissue components, particularly water, hemoglobin, and melanin.
激光与组织相互作用的原理
The fundamental principle behind surgical lasers lies in the interaction of specific light wavelengths with tissue.水是软组织的主要成分，在激光能量的吸收中起着至关重要的作用。 Lasers with wavelengths highly absorbed by water tend to vaporize tissue with minimal collateral thermal damage, allowing for precise cutting.相反，血红蛋白或黑色素等发色团吸收的波长对于凝血和治疗血管病变有效。 The depth of penetration and the thermal effects on surrounding tissue are critical considerations in selecting the appropriate laser for a given surgical procedure.
常见类型的手术激光器
Several types of lasers are employed in surgery, each with distinct properties and applications:
二氧化碳 (CO2) 激光器
CO2 激光器的工作波长为 10,600 nm，是一种被水高度吸收的气体激光器。这一特性使得它们在以最小的热扩散精确切割和汽化软组织方面非常有效。 The shallow penetration depth (approximately 0.015 mm) ensures high precision and simultaneous hemostasis by sealing small blood vessels and lymphatics. CO2 lasers are widely used in specialties such as ENT, gynecology, plastic surgery, and maxillofacial surgery. However, their energy cannot currently be transmitted through flexible optical fibers, limiting their use in certain endoscopic procedures [1].
二极管激光器
Diode lasers typically operate in the 800-1,000 nm range.与 CO2 激光器相比，它们的波长具有明显更大的水吸收/穿透深度。 While hemoglobin and melanin strongly absorb light in this range, their relatively low concentrations in soft tissue lead to a more widespread thermal damage zone (several millimeters). This deeper penetration makes diode lasers suitable for non-surgical applications like hair removal, spider vein reduction, and biostimulation, as well as some surgical procedures where broader coagulation is desired [1].
铒激光器
Erbium lasers, with wavelengths in the 2,780-2,940 nm range, are known for their energy efficiency and spatial accuracy in photo-thermal ablation. They are highly absorbed by water, similar to CO2 lasers, leading to precise tissue removal. However, their coagulation ability is poor, being 5-15 times less efficient than CO2 lasers. The shallow optical absorption and coagulation depths of erbium lasers mean they are less effective at preventing bleeding from severed blood vessels during tissue ablation [1].
Nd:YAG 激光器
钕-YAG (Nd:YAG) 激光器是发射 1060 nm 红外光的固态激光器。它们被无色和有色组织吸收，并能有效密封血管。 Nd:YAG 激光器用于治疗狭窄或肉芽肿性病变、良性肿瘤，以及消除各种管道（包括气管、支气管树、胃肠道和泌尿系统）的癌症。它们可以通过柔性光纤传输，适合内窥镜应用 [2]。
氩激光器
氩激光器是产生蓝绿光的气体激光器，主要波长为 488 和 514 nm。它们在凝固血管方面非常有效，可用于显微外科手术、治疗出血性溃疡以及去除血管病变或皮肤小肿瘤。氩激光器还可以与柔性光纤一起使用[2]。
KTP 激光器
磷酸钛氧钾 (KTP) 激光器是产生 532 nm 绿光的固态激光器。它们主要用于凝固血管[2]。
准分子激光器
准分子激光器是由电离惰性气体产生的紫外激光器。它们通过以最少的热量直接将组织从固体转变为蒸汽（光消融）来进行消融，这使得它们可用于精细手术中的精确组织去除[2]。
结论
各种各样的手术激光器为医疗专业人员提供了专门的工具来解决各种情况。每种激光类型都以其独特的波长和组织相互作用为特征，为特定的手术应用提供了独特的优势。激光技术的不断进步有望在未来的医疗干预中实现更高的精度和效率。
参考文献
[1] 光手术刀。比较手术激光器。网址：[https://www.lightscalpel.com/laser-surgery/](https://www.lightscalpel.com/laser-surgery/) [2] AZoM。医疗领域激光指南。网址：[https://www.azom.com/article.aspx?ArticleID=15915](https://www.azom.com/article.aspx?ArticleID=15915)