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Two different methods, one plethysmographic and one where the elimination of radioactive inert gas was measured, have been used to calculate the blood flow in the mucosa of the maxillary sinus in living man. A total of 5 persons were investigated and the mean values of the blood flow in the two methods showed a close correlation. Plethysmography is more(More)
Experimental studies of human maxillary sinus gas exchange show that there is a balance between inflow of air through the maxillary ostium and local consumption as long as the functional size of the ostium is at least 5 mm2. Maxillary sinus mucosal blood flow is 30-40 ml/100 g tissue per minute, as measured in plethysmographic studies. This blood flow can(More)
The total gas pressure in experimentally occluded maxillary sinus was continuously recorded during 90 minutes on 7 healthy human subjects. PO2 and PCO2 were measured before and after the total pressure recording. In 3 cases the volume changes in the sinus were measured. The total gas pressure after an initial increase to about 35 mm H2O decreased to a(More)
Eleven subjects were investigated concerning the effect of postural changes on the functional size of the maxillary ostium. The ostial size expressed as the percentage of the initial value decreased only slightly when the body position was altered from 90 degrees (sitting) to 30 degrees, while the decrease between 30 degrees and 0 degrees (lying) was more(More)
A stuffy and running nose are two of the most expressed symptoms of acute rhinosinusitis and have made the use of decongestants very common. The medication, oral or nasal, gives relief from symptoms but its effect on the healing of the infection, positive or negative, is not clear. The effect of Xylometazoline on the blood flow, the pulse amplitude and the(More)