THE need for repeated antral irrigations in the treatment of maxillary sinusitis occurs on occasion. I have found the short Medicut cannula, used intravenously, beneficial in eliminating multiple antral punctures.
The unit consists of a 2½-cc plastic syringe and a 3½-inch needle with a tight-fitting 18-gauge plastic cannula (Figure). In use, the inferior meatus is anesthetized with topically applied cocaine or infiltration of lidocaine. The syringe is filled with 1 cc of 1% lidocaine with 1:100,000 epinephrine, and the needle advanced through the wall of the inferior meatus at the usual site for sharp puncture. Aspiration can be done with the syringe to confirm the presence of the needle tip in the sinus, as well as to inject additional anesthetic, if needed. Other cannula sizes (14, 16, and 20 gauge) are available.
Following placement of the needle, the inner needle is removed, leaving the plastic cannula in the sinus. A