鼻のかみ方

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タイトル別名
  • HOW TO BLOW THE NOSE
  • 鼻のかみ方--〓鼻の気体動力学的研究
  • ハナ ノ カ ミカタ ビ ノ キタイ ドウリキガクテキ ケンキュウ
  • AN AERODYNAMIC STUDY OF THE NOSE BLOWING

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Nose blowing is said to be one of the important matters for nasal hygiene.Although the maneuvers of nose blowing largely differ between Europeans and Japanese, it seems obvious and easy for all adults to blow their noses.Do they blow their noses properly The purpose of this paper is to obtain accurate data of nose blowing, to analyze the maneuver, and to give good instructions to those who do not understand how to blow the nose. <br>Expiratory velocities of each side of the nose with increasing efforts were successively re-corded by two pneumotachometers arranged in parallel.Expiratory velocity, volume and time of nose blowing through each side of the nose as well as both sides were repeatedly measured.Pressure changes in the external auditory canal during these maneuvers were also observed using a balloon catheter connected to a sensitive pressure transducer. <br>A mean value of the maximum expiratory velocity in nose breathing was 1.87 LPS, while that of nose blow through one side was 1.81 LPS.The epiratory volume of a nose blow was 1.34 L and the time was 1.23 SEC in average.These values were slower, smaller and longer than those of coughing or sneezing.Pressure change in the auditory canal was often observed during forced expiration.During nose blowing through one side 31 out of 60 trials showed the positive pressure change, while 7 showed the negative change.No change was found in 22 trials. <br>The velocity in less patent side is increased by closing the nostril of more patent side.This is the reason why one side of the nose is blown at one time when a different patency exists.The faster is the expiratory thrust of a nose blow, the more efficiently it pushes out secretions in the nasal cavity.Pressure change in the auditory canal observed in such maneuvers does not usually cause acute infection in the tympanic cavity. <br>A forced expiration such as cough or sneeze eliminates secretions not only from the upper airways but from the lower airways as well by its speed and dynamic intrathoracic compression. Nose blow may also have the similar function.This is accomplished when the expiration covers the middle and the lower two-thirds of the vital capacity.A big and long nose blow is therefore recommended to prevent upper and lower respiratory tract diseases.

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