απο wikipedia.
Effects of cabin pressurization on the human body
* Ear and paranasal sinuses - One needs to adjust to the pressurized cabin air from the beginning. 1 in 3 passengers suffer ear discomfort, pain and temporary hearing loss on takeoff or landing, called "aerotitus" by the House Ear Institute in Los Angeles. Rapid changes in air pressure cause the air pocket inside the ear to expand during takeoff and contract during descent, stretching the eardrum. To equalize pressure, air must enter or escape through the Eustachian tube. "If a passenger has serious congestion, they risk ear drum damage", says Sigfrid Soli, Ph.D., head of the HCSD Department at the HSI(?).
* Tooth - Anyone with intestinal gas or gas trapped in an infected tooth may also experience Barodontalgia, a toothache provoked by exposure to changing atmospheric pressure.
* Pneumothorax - Anyone who has suffered a pneumothorax is recommended not to fly (even in a pressurised cabin) for at least 1 month and should obtain an x-ray prior to travelling.
As well as the more acute health effects experienced by some people, the cabin pressure altitude of 8,000 feet typical in most airliners contributes to the fatigue experienced in long flights. The in-development Boeing 787 airliner will feature pressuration to the equivalent of 6,000 feet, which Boeing claims will substantially increase passenger comfort.
Some people may still experience symptoms of altitude sickness despite the cabin pressure.
Altitude sickness
From Wikipedia, the free encyclopedia
Altitude sickness, also known as acute mountain sickness (AMS) or altitude illness is a pathological condition that is caused by acute exposure to high altitudes. It commonly occurs above 2,500 metres (approximately 8,000 feet). Acute mountain sickness can progress to high altitude pulmonary oedema (HAPE) or high altitude cerebral oedema (HACE), ultimately resulting in death.
Another, rarer, type of altitude sickness caused by prolonged exposure to high altitude is chronic mountain sickness, also known as Monge's disease.
Introduction
Different people have different susceptibilities to altitude sickness. For some otherwise healthy people symptoms can begin to appear at around 1,500 meters (5,000 feet) above sea level. This is the altitude of Mexico City (2,240m/7,349ft.) and Denver, Colorado (1,609m/5,280ft). Diets high in carbohydrates may make people suffering from AMS feel better. Carbohydrates require less oxygen to metabolise than fats, but the volumes involved are not large and the mechanism may not be so direct. High altitude pulmonary edema (HAPE) and cerebral edema HACE are the most ominous of these symptoms, while acute mountain sickness, retinal hemorrhages, and peripheral edema are the milder forms of the disease. The rate of ascent, the altitude attained, the amount of physical activity at high altitude, and individual susceptibility are contributing factors to the incidence and severity of high-altitude illness.
Altitude sickness usually occurs following a rapid ascent, and can usually be prevented by ascending slowly [1]. In most of these cases, the symptoms are only temporary and usually abate with time as altitude acclimatisation occurs.
Signs and symptoms
Headache is a primary symptom used to diagnose altitude sickness. A headache occurring at an altitude above 8000 feet (2,400 metres), combined with any one of the following symptoms, indicates probable altitude sickness.
* Anorexia (loss of appetite), nausea, or vomiting
* Fatigue or weakness
* Dizziness or light-headedness
* Insomnia
The early symptoms of altitude sickness include drowsiness, general malaise, and weakness, especially during physical exertion. More severe symptoms are headache, insomnia, persistent rapid pulse, nausea and sometimes vomiting, especially in children. Extreme symptoms include confusion, psychosis, hallucination, symptoms resulting from pulmonary edema (fluid in the lungs) such as persistent coughing, and finally seizures, coma and death.
Δεν νομιζω ενας "πιλοτου αερογραμμων πετωντας συχνα και σε τοσο μεγαλα υψη ?????" που εχει ενεργο class 1 medical και πεταυ ΣΥΧΝΑ σε μεγαλα υψη να αναπτύξει χρονια προβλήματα, η εστω να βιώνει πονοκεφάλους, ανχος, αυπνίες, σωματική καταβολη και να επιτρέπετε να πεταξει, αυτο γιατι ολα αυτα τα συμπτώματα οδηγούν σε σοβαρες παθήσεις, ακομη και σε θανατο.
Δεν νομιζω να πεθαινουν "ετσι" οι πιλοτοι απο τις πολλες πτησεις.
Περισσοτερες λεπτομερειες απο καποιον χειριστη,βεβαια.
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