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To analyze the influencing factors for the stable of cones, and to investigate its prevention suction loss strategy during SMILE surgery
In this retrospective study using operation video, the indications of signal of suction loss characteristics were recorded. 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
The indication characteristics of signal of suction loss. A total of 50 eyes were observed, 96% cases of which were located in the upper part (including superior temporal and nasal) 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 100% appeared. 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 for indication signal of suction loss, while there was no actual suction loss when intervention was performed (head fixed).
Suction loss in SMILE is often related to intraoperative eye and head movement (mainly mandibular movement) of patients. Correct deal with can effectively prevent the occurrence of loss of suction