hapenkuljetuskykyyn

Hapenkuljetuskykyyn is the illative form of hapenkuljetuskyky, a term used in physiology to describe the body's capacity to transport oxygen from the lungs to tissues. The illative form is used in Finnish texts to refer to aspects, changes or responses directed toward this capacity, for example hapenkuljetuskykyyn liittyvät tekijät (factors related to oxygen transport capacity).

Hapenkuljetuskykyyn represents an integrative function that combines pulmonary oxygen uptake, arterial oxygen content and oxygen delivery by the circulatory system with the ability of tissues to extract and utilize oxygen. In practice, the capacity is determined by several interacting components, including hemoglobin concentration and saturation, cardiac output, lung diffusion capacity, and the microvascular and mitochondrial properties of exercising muscles. Training can modify many of these determinants by improving capillary density, mitochondrial efficiency, and stroke volume, whereas certain diseases or conditions can reduce the capacity.

Measurement and determinants largely rely on the Fick principle and functional tests. A key proxy for maximal transport capacity is VO2 max, which reflects the maximum rate of oxygen consumption during intense exercise. This value is influenced by cardiac output and the arteriovenous oxygen difference, which in turn depend on hemoglobin levels, oxygen saturation, and tissue extraction ability. Laboratory measurements may include Hb concentration, SaO2 and CaO2, while clinical assessments consider cardiovascular, pulmonary and hematologic factors.

In practice, hapenkuljetuskykyyn is relevant for athletic performance, cardiopulmonary health, and disease management, as well as for understanding adaptations to training or environmental factors such as altitude. See also hapenkuljetuskyky and VO2 max.