For haemostasis and to guarantee the drainage following operative procedures on the maxillary sinuses, the sinus is usually plugged with a gauze strip or balloon tamponade through the drainage window in the inferior nasal meatus. This generally causes massive edema of the face and subjective complaints of the patient, the risk of an anaerobe infection is increased. By using fibrin glue that is applied by a spray catheter into the maxillary sinus, there is no need of a tamponade as a haemostypt. The sinus is drained by a small vinyl tube through the window in the inferior nasal meatus.