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Tympanic membrane morphology changers after 4 hours.
| Tympanic membrane congestion | Tympanic membrane dilating | Tympanic effusion | |
|---|---|---|---|
| Experimental group before treatment | Serious | Serious | Presence |
| Experimental group after treatment | Lighten | Regression | Regression |
| Control group before treatment | Serious | Serious | Presence |
| Control group after treatment | Lighten | Invalid | Not subsided |
