1. Factors affecting the effect of cochlear implantation 1. Patient’s own conditions: age at the time of deafness, cause of deafness, degree of deafness, presence of residual hearing, cochlear deformity, intelligence level, age of implantation, preoperative language ability and listening experience, preoperative hearing aid wear and rehabilitation training, parents’ or patients’ desire and expectation to regain hearing, etc. Family culture, parents’ care for their children and communication style, etc. 2. Family culture, parents’ care for the deaf child and communication style, etc. 2. Surgical factors: such as whether the round window is implanted, whether the implantation is smooth, the depth and position of the electrode implantation, whether there are surgical complications, etc. 3. Post-operative cochlear implant commissioning is also important to determine whether the cochlear implant is in an optimal working condition. 4. Post-operative auditory and speech rehabilitation methods and rehabilitation time. 5. Whether you insist on using the cochlear implant, whether you don’t rely on looking at the mouth and really rely on the cochlear implant to communicate through listening, etc. The higher the subjective motivation in the use of hearing and speech expression, the better. Second, postoperative precautions: 1. 1 week after surgery, hot towels can be used to wipe the area other than the head wound. You should not wash your hair within 2 weeks after surgery, and use a shower cap to protect your head when bathing within 2 weeks. 2 weeks or later, do not scratch the cochlear implant area with your nails when washing your hair, but rub it gently with your palm or fingertips with shampoo to avoid scratching your scalp with your nails. 2. Avoid strong magnetic fields near your head, especially around the cochlear implant. Strong magnetic fields include large magnets, magnetic therapy machines, magnetic resonance examinations, etc. 3. Avoid strong electromagnetic waves passing through the head: There are precision integrated circuits inside the cochlear implant, which are especially afraid of strong static electricity and strong electromagnetic waves, but of course radio signals in general occasions will not have an effect, such as being able to listen to cell phones. However, you should avoid doing ultrashort wave and microwave therapy to the head. Try to avoid staying near the high-powered transmitting antenna of radio and television for a long time. Try to use cotton fabrics for underwear to prevent static electricity. Try to avoid going to plastic slides when wearing sweaters and chemical fiber products, because friction between chemical fiber and plastic will generate static electricity, which may wash out the program stored in the chip and cause the cochlea to work improperly.