A Keratotomy Knife Using Guided Wave Transmission to Realize Longitudinal Bending Two-dimensional Ultrasonic Vibration

Abstract

The inVention proVides a corneal cutting knife for achieVing longitudinal bent two-dimensional ultrasonic Vibration by means of waVe guide transmission and relates to a corneal ultrasonic cutting deVice. The corneal cutting knife is proVided with a transducer, a waVe guide line, a waVe guide line welding tool head, a knife handle and a bent blade; a blade grooVe is formed in the output end face ofthe knife handle, and the bent blade is welded and bonded to the interior of the blade grooVe of the knife handle, so that the bent blade is connected with the knife handle; cutting edges are arranged on both the inner and outer sides of the bent blade, the waVe guide line is separately welded and bonded to the transducer and the waVe guide line welding tool head, and the waVe guide line weldingtool head is screwed to the knife handle, so that longitudinal ultrasonic Vibration energy of the transducer is transmitted to the bent blade through the waVe guide line. Small deformation cutting ofcorneal tissue can be achieVed, an incision is flat and smooth, and the cutting depth can be precisely controlled. The introduction of a waVe guide transmission mode can ensure that waVes in the waVeguide line can be transmitted in an ideal longitudinal Vibration waVe transmission mode, and the situation is aVoided that influences are caused on elliptical Vibration cutting of the tool head sinceother waVes different in frequency are generated in the line under a frequency dispersion effect.

Description

technical field [0001] The invention relates to a corneal ultrasonic cutting device, in particular to a method that can replace the existing manual trepanning method, and introduces a guided wave transmission ultrasonic vibration mode, which is different from the traditional ultrasonic device and uses guided wave transmission to realize longitudinal bending two-dimensional ultrasound. Vibrating Keratotomy Knife. Background technique [0002] At present, corneal trephination is generally used in eye corneal transplantation to perform manual circumcision or laser circumcision. Corneal circumcision is a highly delicate microscopic surgery. Especially in lamellar keratoplasty, the depth of circumcision is about 2 / 3 of the thickness of the cornea, that is, 300-400 μm. Therefore, the surgery requires high precision in the depth of corneal circumcision. Traditional manual circumcision requires long-term training, the incision is not smooth, and the depth of circumcision cannot be...

AI Technical Summary

Problems solved by technology

Traditional manual circumcision requires long-term training, the incision is not smooth, and the depth of circumcision cannot be guaranteed due to the viscoelastic and superelastic characteristics of corneal tissue; although laser cutting has high precision, it has certain risks to the eye, such as femtosecond In corneal transplant surgery, laser has unsafety (easy to damage the intraocular tissue), instability (the diseased cornea will affect the laser energy), limitations (negative pressure suction is required and is not suitable for cases where the cornea is on the verge of perforation), etc. Questions (①Duan Xianyi. Nanjing University, 2015; ②Liu Xiaoyu. Beihang University, 2008; ③Botchway S W, Reynolds P, Parker AW, et al. MutationResearch / reviews in Mutation Research, 2010, 704(1-3): 38–44)

The ultrasonic vibration cutting head part of the traditional ultrasonic cutting method is relatively bulky, which is not conducive to the operation and control of fine eye surgery

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