How Fast Hydrogen Gas Moves Through Muscle Tissue in Rats
- Authors
- T. Kawashiro, A.C. Carles, S.F. Perry, J. Piiper
- Journal
- Pflugers Archiv: European Journal of Physiology
- Year
- 1975
- DOI
- 10.1007/BF00587381
- Study Type
- Rat
- Outcome
- Neutral
- Peer Reviewed
- Yes
- Country
- Germany
- Health Condition
- Whole Body
- Body System
- Muscular
TL;DR
Researchers measured how quickly different gases move through rat muscle tissue and found that gas movement is slower in muscle than in water and is more closely related to the size of the gas molecules than their weight.
Key Finding
Hydrogen diffuses through rat muscle tissue at measurable rates, with a diffusion coefficient approximately half that observed in water, establishing foundational data for gas transport in muscle.
Summary
This study measured how quickly different gases, including hydrogen, can move through rat muscle tissue. Researchers found that gases diffuse (spread out) through muscle at about half the speed they do through water. The study established baseline measurements for how different gases travel through muscle, which could be relevant for understanding how therapeutic gases might be delivered to tissues.
Practical Takeaway
This is a basic science study in rat tissue that measures physical properties of hydrogen movement—not a study of hydrogen's health effects. While it provides useful technical data about how hydrogen gas could theoretically travel through muscle, it does not demonstrate any biological benefits or safety profile for hydrogen water in humans.
Abstract
Krogh's diffusion constant (K) was determined for various inert gases in isolated rat abdominal muscle at 37 degrees C by measuring the amount of gas diffusing per unit time and partial pressure difference through a portion of the muscle of known surface area and thickness. The following mean values for K, in 10(-9) mmol-min-1-cm-1-torr-1, were obtained: C2H2, 42.2; N2O, 20.0; CHClF2, 18.8; H2, 1.67; He, 1.42; CH4, 1.27; SF6, 0.081. From Krogh's diffusion constant, the diffusion coefficient (D) was calculated using the solubility coefficient determined previously in the same preparation. The D values thus obtained were found to be about half the D values in water at 37 degrees C. Model calculations show that for gases with high lipid/water partition coefficient, D in tissues containing lipid is underestimated by this method. Graham's law (inverse proportionality between D and square root of molecular mass) was found to represent a useful approximation for these gases. A better correlation, however, was obtained between D and the molecular diameter.