Research And Implement On Adjuvant Therapy Instrument For Meibomian Gland Dysfunction

Meibomian gland Dysfunction is the main reason of evaporative dry eye which has a high morbidity in our country. This article did research on electromechanical integration for the most important steps in MGD treatment, which consists of compress and Meibomian gland massage, designed an adjuvant treatment instrument for MGD and got a primary implementation.An extrusion method using anti-phase massage rollers and a theory on envelope plane and a new massage method were proposed after a research on traditional rolling massage whose design limitations were found.According to the ergonomic requirements,the statistical mean of eye data was set to be basis of reference. Massage module and enveloping structure, which conform to the eye outline of normal persons,were designed respectively on the basis of the two massage theory. Meanwhile a pupillary distance adjustment mechanism was designed to meet the adaptability of instrument for different patient.Airbag layers, whose shape matched massage structure, were designed and manufactured using medical grade TPU. Airbags can separate the instrument from outside world that ensures the leakproofness and stability of the instrument.Structurally, carbon fiber for heating were embedded in film airbags to strictly ensure eyelids to be heated uniformly.The treatment instrument adopts the single-chip microcomputer as controller. Massage module driven by stepper motors could achieve an effect of low speed and high torque. The hot compress part adopted flexible carbon fiber bundle as the heating source, monitored the temperature by thermocouple and kept the temperature constant through feedback control method. In order to ensure the instrument tightness, a miniature air pump for inflating and deflating the balloon, control of pressure and massage pressure. On the premise that the instrument was sealed, the air pressure and massage pressure were controled when the air pump inflated and deflated the airbags. After design work of stucture and control module, instrument integration design was made and distribution of components and circuits was discussed according to the contact among all parts.