Posters
Observation and control of signal of suction loss during SMILE surgery
Poster Details
First Author: L.Liu CHINA
Co Author(s): J. Bai T. Zhang
Abstract Details
Purpose:
To analyse the influential factors for the stability of cones, and to investigate a strategy of prevention of suction loss during SMILE surgery.
Setting:
Chongqing Ophthalmological Hospital Chongqing China
Methods:
In this retrospective study using operation videos, the characteristic indications of suction loss were recorded. Moreover, the incidence and management of the complications as well as the potential factors were analysed. The volunteers simulated the direction and degree of eye and head movement when the feature of "loss of suction" appeared in the process of centration with the cone. The effect of indication of suction loss was observed using corresponding intervention strategies. We compared the incidence of suction loss between the intervention group and the control group (20 eyes each) after the occurrence of indication of suction loss.
Results:
The indication characteristics: water, gas or conjunctiva entry between cone and corneal edge. 96% cases of which were located in the upper part and 4% in the lower part. When the volunteers simulated loss of suction by moving mandible down and forehead up, the superior loss of suction appeared in 100% of cases. The contrary movement induced contrary loss of suction. Indication suction loss could be terminated when the movement stopped. Actual suction loss occurred in 6 eyes when there was no intervention upon indication of suction loss, while there was no actual suction loss when intervention was performed (head fixed).
Conclusions:
Suction loss in SMILE is often related to intraoperative eye and head movement (mainly mandibular movement) of patients. Correct preoperative and intraoperative guidance as well as intraoperative fixation of the patient's head position can effectively prevent the occurrence of loss of suction.
Financial Disclosure:
None
