This procedure is done for diagnosis as well as treatment of sinusitis. This procedure involves introduction of a canula into the maxillary sinus cavity via an opening made in the inferior meatus. This procedure is rather out moded these days. One reason that could be stated for failure of this procedure is that maxillary sinus drainage is not dependent on gravity assisted drainage to drain away its secretions. Drainage of maxillary sinus on the other hand is dependent on the ciliary beat of the cells lining the sinus mucosa.