Medical Herald Volume 37 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...as such has a nutritive effect is very old, and it even seems that by means of hyperemia the deficient stimulus to formation of bony tissue in absent formation of callous can be fanned into life." From this we see how all important hyperemia is, both in causing the elimination of the infection, and in promoting the activity of the regenerative forces, and I am sure that to one who partially appreciates the defensive and life giving forces of the blood, a preparation, that, when introduced within the soft tissues surrounding the teeth, is capable of producing a marked and lasting hyperemia of the parts. This preparation, which is known as the ethyl borate gas, is especially prepared, at the time of its administration, in a machine particularly adapted to its making. Necessary Aids The gas is an unstable oxygen compound, formed by the uniting of the Dunlop compound oxygen with the Dunlop ethyl borate solution. In the free state it is a transparent, semi-volatile liquid of a slightly acrid taste, but pleasant odor. In the gas machine, and under pressure of about one-half an atmosphere, or seven pounds, the liquid becomes surcharged with oxygen from the specially prepared gas in the tank, and is discharged through the needle as a highly diffusible oxyethl-borate gas with the oxygen in loose combination. Upon its release into the soft tissues of the mouth, the oxygen is separated from the compound and passes into the blood, while the ethyl borate is precipitated into the interstices of the soft tissues. Though still active, the oxygen thus liberated is so modified as to have lost considerable of its oxidizing powers, and is taken up by the blood without producing any untoward symptoms. The oxygen joins with the hemaglobin, producing oxy-hemaglobin ud libera...