航空機の機内空気の循環と風邪の症状
Jessica Nutik Zitter1, Peter D Mazonson, Dave P Miller
1Department of Medicine, University of California, San Francisco, Box 0843, San Francisco, CA 94143-0843, USA. nutik@itsa.ucsf.edu
JAMA
|July 23, 2002
まとめ
航空機の空気再循環は,飛行後の上呼吸道感染症 (URI) のリスクを増加させません. この研究では,循環空気の飛行機の乗客と新鮮な空気の乗客の間で,URIの症状の有意な違いが見つかりませんでした.
科学分野:
- 航空衛生 航空衛生 航空衛生
- 感染症の伝播 感染症の伝播
- 公衆衛生は公衆衛生である.
背景:
- 現代の商用航空機は,新鮮な空気のみを使用する古いモデルとは異なり,燃費効率のためにキャビン空気の50%まで再循環します.
- 空気の再循環が航空機の客室で伝染病の伝播に与える影響は不明であり,いくつかの研究は再循環された空気の環境で風邪の発生率が増加することを示唆しています.
研究 の 目的:
- 航空機の機内空気の循環が,飛行後の上呼吸道感染症 (URI) の有意な予測要因であるかどうかを調査する.
主な方法:
- 1999年1月から4月までの間にサンフランシスコ湾区からデンバーへのフライトで1100人の乗客を対象とした自然実験.
- 参加者は,フライト前アンケートと7~7日後のフォローアップ電話インタビューを完了し,URIの症状を報告しました.
- 47%の乗客が100%の新鮮な空気を搭載した航空機で旅行し,53%がキャビン空気を再循環した航空機で飛行した.
主要な成果:
- 再循環する航空機の乗客と再循環しない航空機の乗客の間では,飛行後の呼吸器系の症状の発生率において統計的に有意な違いは観察されなかった.
- 風邪 (19% vs. 21%),鼻水 (10% vs. 11%) と集約されたURI症状 (3% 両グループで) の報告率は類似していました.
- これらの結果は,潜在的な混同要因を調整した後も一貫していた.
結論:
- この研究では,機内空気の循環が乗客のURI症状のリスクを高めるという主張を支持する証拠は見つかりませんでした.
- 結果は,商業用ジェット機における現在の空気再循環慣行が,URIに関して乗客の呼吸器の健康に悪影響を及ぼさないことを示唆しています.
関連する概念動画
Common Respiratory Disorders
Respiratory disorders, a prevalent health concern globally, are generally divided into two primary categories: upper and lower respiratory tract disorders. The categorization is based on the area of the respiratory system they affect.
Upper respiratory disorders impact the airways above the vocal cords, encompassing areas like the nose, sinuses, and throat. Various conditions fall under this category, including the common cold and allergic rhinitis. These disorders can stem from several causes,...
Upper respiratory disorders impact the airways above the vocal cords, encompassing areas like the nose, sinuses, and throat. Various conditions fall under this category, including the common cold and allergic rhinitis. These disorders can stem from several causes,...
Drugs Used in Upper Respiratory Disorders: Overview
Upper respiratory tract disorders, including viral infections and allergic rhinitis, cause significant discomfort and disrupt daily life. Managing these conditions involves a variety of drugs, such as antihistamines, intranasal steroids, decongestants, antitussives, expectorants, and mucolytics. Specific examples of drugs in each category are provided.
Antihistamines (e.g., Benadryl) block histamines from binding. Histamines are chemicals released during an allergic reaction in the body. As a...
Antihistamines (e.g., Benadryl) block histamines from binding. Histamines are chemicals released during an allergic reaction in the body. As a...
Pulmonary Cycle: Exhalation
In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
Anatomy of Respiratory System I: Upper Respiratory Tract
The upper respiratory tract plays a vital role in the respiratory system, comprising several structures that facilitate air intake and prepare air for the lungs. It also serves as the first line of defense against pathogens and particles. This tract includes the nose and nasal cavity, the oral cavity, the paranasal sinuses, and the pharynx, each with specific functions and features.
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract.
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract.
Asthma-III: Symptoms and Complications
Asthma, a common chronic respiratory condition, is classified considering the frequency and severity of symptoms alongside lung function impairment. Understanding this classification is essential for appropriate treatment and management. Here's a detailed look at the classification of asthma and its clinical features and complications:
Classification of Asthma
Classification of Asthma
Asthma III: Clinical Manifestations
Asthma presents with a characteristic pattern of episodic respiratory symptoms that reflect underlying airway inflammation, bronchoconstriction, and mucus hypersecretion. Although severity varies among individuals, certain clinical manifestations are considered hallmarks of the disorder and often guide diagnosis and assessment.Respiratory SymptomsA persistent cough is one of the most common early features of asthma. It is frequently dry and tends to worsen at night or in the early morning,...


