玻切头

vitrectomy tip

玻切头插图

中文介绍

  • 定义与用途：玻切头是玻璃体切割手术中的关键器械。玻璃体切割手术主要用于治疗玻璃体混浊、视网膜脱离、糖尿病性视网膜病变等多种眼部疾病，玻切头的作用是切割并吸出玻璃体组织，为后续的眼部修复等操作创造条件。
  • 结构特点：一般由刀头、套管、连接管等部分组成。刀头是执行切割功能的核心部位，通常采用锋利且耐磨的材料制成，形状多样，如圆形、椭圆形等，以适应不同的手术需求。套管用于保护刀头，并引导吸出的组织进入连接管。连接管则与玻切设备主体相连，用于传输切割后的组织及维持液体循环。
  • 工作原理：玻切头通过与玻切机连接，由玻切机提供动力。刀头可进行高速往复运动或旋转运动，对玻璃体组织进行切割。同时，借助负压系统，切割下来的玻璃体组织会通过套管和连接管被吸出体外，从而实现玻璃体的切除操作。
  • 种类与规格：根据切割频率和刀头尺寸等不同，玻切头有多种类型。常见的切割频率有 5000 次 / 分钟、8000 次 / 分钟等，刀头规格则有 20G、23G、25G、27G 等，数字越小，刀头直径越大，不同规格适用于不同的手术场景和眼部情况。

英文介绍

  • Definition and usage：The vitrectomy cutter head is a key instrument in vitrectomy surgery. Vitrectomy is mainly used to treat various eye diseases, such as vitreous opacity, retinal detachment, diabetic retinopathy, etc. The vitrectomy cutter head is used to cut and suck out vitreous tissue, creating conditions for subsequent eye – repairing operations.
  • Structural features：It is generally composed of a cutter head, a cannula, a connecting tube and other parts. The cutter head is the core part for cutting, usually made of sharp and wear – resistant materials, with various shapes, such as circular, oval, etc., to meet different surgical needs. The cannula is used to protect the cutter head and guide the sucked tissue into the connecting tube. The connecting tube is connected to the main body of the vitrectomy device, which is used to transport the cut tissue and maintain fluid circulation.
  • Working principle：The vitrectomy cutter head is connected to the vitrectomy machine, which provides power. The cutter head can perform high – speed reciprocating or rotating movements to cut the vitreous tissue. At the same time, with the help of a negative pressure system, the cut vitreous tissue will be sucked out of the body through the cannula and the connecting tube, so as to achieve the vitrectomy operation.
  • Types and specifications：According to different cutting frequencies and cutter head sizes, there are various types of vitrectomy cutter heads. Common cutting frequencies are 5,000 times per minute, 8,000 times per minute, etc. The cutter head specifications include 20G, 23G, 25G, 27G, etc. The smaller the number, the larger the diameter of the cutter head. Different specifications are suitable for different surgical scenarios and eye conditions.