The ophthalmic vitrector is the core instrument for vitrectomy (PPV) surgeries, mainly used to remove the diseased vitreous tissue within the eye or to handle eye bottom lesions such as the retina and macular area. It is a "key tool" for treating complex eye bottom diseases.
The full name of the ophthalmic vitrector is "vitreoretinotomy". Its core function is to precisely remove the cloudy, proliferative or diseased vitreous tissue within the eye through the combined action of high-speed mechanical cutting and negative pressure suction, while avoiding damage to the surrounding normal structures such as the retina and lens. It is mainly used in "minimally invasive vitrectomy" and is the core equipment for solving eye bottom diseases such as vitreous hemorrhage, retinal detachment, and macular holes.
The operation of the vitrector relies on the "cutting - perfusion - suction" triad system.
1. Core cutting component
The tip is the key part, usually made of titanium alloy or medical stainless steel, in the form of a slender needle (the needle diameter is usually 23G, 25G, 27G, with larger numbers indicating thinner diameters). The end of the tip has a high-speed rotating cutting edge (3000-15000 revolutions per minute), which can break down the vitreous tissue into tiny particles.
2. Perfusion and suction system
Perfusion channel: The outer side of the tip is equipped with a perfusion tube, which continuously injects sterile balanced salt solution to maintain stable intraocular pressure and prevent eyeball collapse.
Suction channel: The interior of the tip is a hollow structure, through which negative pressure is used to suck out the cut vitreous fragments, accumulated blood, etc. from the eye, maintaining a clear surgical field.
3. Energy and speed control
The cutting speed and negative pressure can be adjusted through the surgical control console: Soft vitreous is cut at a low speed (3000-6000 revolutions per minute), and proliferative hard vitreous requires a high speed (8000-15000 revolutions per minute), balancing cutting efficiency and tissue safety.
