High-Altitude Medical

HANDBOOK

HIGH-ALTITUDE CONDITIONS

I will help make your journey toward your dream Everest easier. Mountain conditions differ significantly from those you leave behind at the start of your expedition. The key differences include decreasing atmospheric pressure with altitude, which leads to reduced oxygen availability, lower air temperatures, reduced humidity, and increased UV radiation.

THE GOLDEN RULES OF ACCLIMATIZATION

The human body has a remarkable ability to adapt to new environments—but it needs time. The main challenge at altitude is the lack of life-sustaining oxygen, which decreases with every meter gained. As altitude increases, we begin to breathe faster, and the number of red blood cells in our blood rises, improving oxygen transport. This adaptation process is called acclimatization.

Most people, given sufficient time (weeks), can acclimatize without major problems to altitudes of 5,000–5,500 m above sea level, which corresponds to the elevation of Mount Everest Base Camp.

Above 5,500 m, long-term survival is not possible for most people. Time spent at these altitudes should be minimized, as the body progressively deteriorates day by day. A gradual acclimatization process allows humans to survive—even without supplemental oxygen—in extreme conditions such as those on the summit of Mount Everest.

History provides stark lessons: in 1875, two crew members of the balloon Zenith ascended to 8,000 m within just a few hours. Due to severe oxygen deprivation, they lost consciousness and died.

HOW TO ACCLIMATIZE PROPERLY

Follow these essential rules:

➤ Spend your first night at no more than 2,500 m.

➤ Above 2,500 m, gain altitude gradually.

➤ The difference in sleeping altitude between consecutive nights should not exceed 500 m.

➤ You may climb higher during the day, but always sleep no more than 500 m higher than the previous night.

➤ If you plan to sleep more than 500 m higher, take a rest day before—or, if unavoidable, after—the ascent to allow your body to adapt.

➤ For every 1,000 m of gradual altitude gain, schedule a rest day.

➤ Avoid direct transport to altitudes above 2,500 m whenever possible.

WHEN IDEAL ACCLIMATIZATION IS NOT POSSIBLE

If following these rules is not feasible, you must closely monitor your body and respond immediately to any symptoms of altitude illness. In such situations, acetazolamide (Diamox) may be used to reduce the risk of acute mountain sickness (AMS).

Preventive use of acetazolamide:

➤ Start 24 hours before rapid ascent above 2,500 m

➤ Continue for 2–4 days at the highest planned altitude

➤ Dosage: ½ tablet every 12 hours

➤ While taking acetazolamide, electrolyte supplementation is essential

ACCLIMATIZATION ON HIGH PEAKS (6,000–8,000 M)

For experienced mountaineers, the above rules may seem difficult to apply—especially when camps are separated by nearly 1,000 m or when reaching base camp at 4,000 m requires a helicopter flight.

On expeditions to 6,000–7,000–8,000 m peaks, we apply the principle:

“Touch high first, sleep there later.”

During successive rotations:

➤ First, you reach (touch) the altitude of the next camp

➤ On the following rotation, you sleep there and touch the altitude of the higher camp

➤ On the next rotation, you sleep higher and touch even higher ground, and so on

INDIVIDUAL ACCLIMATIZATION PACE

Acclimatization is highly individual. It does not depend on gender or physical fitness. Some people adapt quickly, others more slowly—and this must be respected. Always adjust the pace to the slowest team member—you may have a bad day too.

Before departure, it is highly recommended to draw an altitude profile of your planned route and predefine rest days. Reserve extra buffer time (around 20% of the total trip duration) for unexpected situations—this greatly improves safety and comfort in the mountains.

-------

WANT TO LEARN MORE?

If you want to better prepare your health for trekking or a high-altitude expeditions, check out the expanded guide in the ebook "High-Altitude Medicine for Trekkers and Climbers" >>

-----

Gain practical skills for handling emergencies in the mountains through our online training "High-Altitude First Aid" >> - prepared for those planning trips to high altitudes.

-----

 For a detailed list of what to include in your expedition medical kit and step-by-step instructions for assembling your personal first aid set, see the ebook "High-Altitude Expedition Medical Kit Guide" >>

PLANNING A TREK OR A HIGH-ALTITUDE EXPEDITION?

If you would like to check whether your health condition allows you to safely participate in a trek or high-altitude expedition, consider booking a medical consultation >> or using a telemedical expedition package >>

This allows you to assess potential health risks in advance, prepare properly fot altitude, and increase your safety during the expedition.

The company was established in 2004. The goal of MedEverest is education in the field of mountain medicine and the dangers of high altitudes. I deal with all medical aspects of staying at high altitude. I organize medical support for trekking and high-altitude expeditions.

Specialist Medical Practice Medeverest Robert Szymczak based in Gdańsk (80-360), at ul. Bolesława Krzywoustego 19F, NIP: 5841943576, REGON: 220148318.

All rights reserved. Copying content and photos is prohibited. Information obligation before consenting to data processing.(see).

Also checkStore regulations >> Implementation: ColinMedia.eu >>