Technical principle of femtosecond surgery in Wuhan People's Hospital
In recent years, with the progress of science and technology and the development of medical technology, femtosecond laser surgery is more and more widely used in the field of ophthalmology. Wuhan Provincial People's Hospital is an eye hospital that introduced and successfully carried out femtosecond surgery. This article will elaborate the technical principle of femtosecond surgery in Wuhan People's Hospital from four aspects.
1. Introduction to femtosecond laser surgery
Femtosecond laser surgery, also known as femtosecond excimer laser surgery, is a common refractive surgery method. The operation uses laser to peel off the corneal layer and adjust its curvature to improve vision. Compared with traditional corneal ablation, femtosecond surgery is more accurate and safe, and can better protect patients' corneal tissue.
The femtosecond surgery performed in Wuhan People's Hospital is mainly used to correct refractive errors such as myopia, hyperopia and astigmatism, and solve the dependence of patients on glasses or contact lenses. Its technical principle mainly includes two steps: laser cutting and keratoplasty.
2. Principle of femtosecond laser cutting technology
Femtosecond laser cutting is one of the key steps in femtosecond surgery. It uses high-energy laser beam to precisely cut the cornea. The specific process is as follows:
First, doctors use computer controlled lasers to emit ultra fast pulsed laser beams. The energy generated only acts on specific positions of the cornea, and will not cause damage to surrounding tissues.
Then, the laser beam peels off and cuts the corneal layer in seconds, and the thickness is precisely controlled at the level of ten microns. During this process, the patient's eyes are fixed stably to ensure the safety and accuracy of the operation.
Finally, after laser cutting, the doctor makes corresponding adjustments according to the patient's refractive state to achieve the best correction effect.
3. Corneoplasty principle
Another key step of femtosecond surgery is keratoplasty. Its principle is as follows:
Corneoplasty mainly uses laser to reconstruct the cornea to form an ideal arc. The laser beam can form tens of thousands of small gas bubbles in the cornea. These bubbles form an arc layer over time, thus changing the curvature of the cornea.
By precisely controlling the laser energy and processing the position of the cornea, doctors can adjust the shape of the cornea according to the patient's vision problems and corneal conditions, so as to achieve the purpose of correcting refractive errors.
4. Advantages and precautions of femtosecond surgery
Femtosecond surgery has obvious advantages over traditional corneal ablation. First of all, femtosecond surgery uses a non mechanical cutting method to avoid the risk of corneal injury in traditional surgery. Secondly, the operation process is more accurate, fast and stable, and the postoperative recovery time of patients is short.
However, femtosecond surgery is not suitable for all patients, and it may not be suitable for patients in some special circumstances (such as corneal lesions, surgical nonunion, etc.). Therefore, before surgery, doctors need to comprehensively evaluate the patient's corneal condition and diopter to determine whether it is suitable for femtosecond surgery.
Summary
Through a detailed description of the technical principles of femtosecond laser surgery in Wuhan People's Hospital, we understand that the main principles of femtosecond laser surgery include laser ablation and keratoplasty. Femtosecond surgery uses laser to cut cornea and correct refractive errors such as myopia, hyperopia and astigmatism by adjusting corneal morphology. The operation has the advantages of accuracy, safety and speed, but its scope of application is limited. It needs to be evaluated and selected according to the patient's corneal condition. Wuhan Provincial People's Hospital provides high-quality femtosecond surgery services for patients with advanced equipment and technology.
