Lung Transplant Recipient Reaches 6,961-Meter Summit Without Supplemental Oxygen, Setting New Altitude Record
核心洞察
A 51-year-old lung transplant recipient with cystic fibrosis (搜索) successfully summited Mount Aconcagua (6,961 m) without supplemental oxygen, the highest altitude ever recorded for a lung transplant patient.
The expedition involved eight lung transplant and one liver transplant recipients, accompanied by an international medical team including MedUni Vienna (搜索) physicians, with continuous monitoring of heart rate, oxygen saturation, and acute mountain sickness symptoms.
Participants underwent at least 200 hours of hypoxic conditioning over 36 days prior to ascent; the summit climber completed 311 hours, and no severe altitude-related complications were observed during the 19-day expedition.
A 51-year-old man who received a lung transplant in 2002 due to cystic fibrosis (搜索) has become the first transplant recipient to reach the summit of Mount Aconcagua — at 6,961 meters the highest mountain in the Americas — without the use of supplemental oxygen. The achievement, documented in a new publication in Transplant International, represents the highest reported altitude ever attained by a lung transplant recipient and offers unprecedented physiological data on how transplanted lungs respond to extreme hypoxic conditions.
The expedition, which included eight lung transplant recipients and one liver transplant patient, was supported by an international medical team that included physicians from MedUni Vienna (搜索). All participants were carefully selected in advance based on lung function and stress testing, and were continuously monitored throughout the 19-day ascent.
Rigorous Pre-Expedition Conditioning
Prior to departure, participants completed at least 200 hours of hypoxic conditioning over a 36-day period. This protocol involved breathing oxygen-depleted air to simulate high-altitude environments and gradually acclimate the body to reduced oxygen availability. The patient who ultimately reached the summit accumulated a total of 311 hours of such conditioning — substantially more than the minimum requirement.
During the expedition, the research team tracked heart rate, oxygen saturation, and symptoms of acute mountain sickness using the internationally established Lake Louise Score. The physiological measurements revealed striking changes as altitude increased. The partial pressure of oxygen in arterial blood — a key indicator of pulmonary oxygen uptake — dropped from 82 mmHg to 42 mmHg at base camp, situated at 4,350 meters. Blood oxygen saturation fell progressively with increasing altitude, reaching as low as 75 percent.
Despite these marked declines in oxygenation, the patient's acid-base balance remained stable and heart rate changed only slightly. Only mild to moderate symptoms of altitude sickness were recorded, and no severe altitude-related complications — such as high-altitude pulmonary edema or high-altitude cerebral edema — were observed.
Cautious Interpretation and Clinical Implications
The authors of the publication emphasize that these findings should not be generalized to all lung transplant patients. "The observations do, however, show that transplanted lungs can remain functionally adaptable even under conditions of extreme oxygen deprivation, provided this is done under controlled conditions and with careful medical supervision," said Jakob Mühlbacher from the Department of General Surgery at MedUni Vienna (搜索), who accompanied the expedition to the summit.
An accompanying editorial in Transplant International, titled "Living Life to the Fullest After Organ Transplantation," underscored both the remarkable nature of the achievement and the prudence of the medical team. The editorial noted that "great care was taken to acclimatise and monitor patients in order to avoid the potential negative consequences of extreme physical activity following an organ transplant," highlighting what the MedUni Vienna (搜索) publication reveals about "the responsibility and prudence of the medical team."
The detailed physiological data published focus primarily on the summit-reaching patient, who underwent his lung transplant at University Hospital Vienna (搜索) and continues to receive care at the Department of Thoracic Surgery at MedUni Vienna (搜索). The full study, titled "What Is Possible for Patients After Lung Transplantation? The Highest Reported Altitude Achieved by a Lung Transplant Recipient Without Supplemental Oxygen — Climbing Mount Aconcagua (6,961m)," was authored by Jakob Mühlbacher, Alexis Slama, Konrad Hötzenecker, Christina Jelly, Holger Flick, Fedja Dzubur, Matthias P. Hilty, Paul Fellinger, Rodrigo Duplessis, Lukas Furtenbach, Ida Valerie Wedenig, Wilfried Wisser, Clemens Aigner, and Peter Jaksch.