This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
Demarquay and Leconte found that atonic and gangrenous ulcers and diphtheritic wounds recovered under applications of carbonic acid gas when they had not yielded to other remedies. The cicatrization of wounds was also favored by it, and when injected into the cellular tissue in cases of tenotomy, repair of tendons was said to be hastened by it, while by oxygen it was retarded. Good results in the same class of cases have been reported from Rehme, Nauheim, and other Spas where the gas is employed therapeutically (v. p. 167).