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22 HAEMORRHAGE AFTER EXTRACTION.

been removed; in such a case it is necessary to syringe

the socket wit li ice-cold or very hot water or boric Lotion
and then to apply pressure to the '(deeding point I >y firmly
plugging the socket with cotton-wool or lint soaked in
fresh adrenalin or other supra-renal gland preparation;
the application of tannin, either as glycerine of tannin or

on wool soaked in hazeline and powdered with tannin,
answers in many cases. Perchloride of iron is a mosl

unsatisfactory remedy, and should only be used as a lasl
resource when nothing else is obtainable.
Constitutional.—It is not uncommon for an operator to
be warned by the patient that excessive bleeding has pre-
viously followed the infliction of a cut or the extraction

of a tooth. It has been shown that a large proportion of
these cases are due to insufficient coagulability of the blood
owing to an insufficiency of calcium salts ; it is therefore
wise in such cases to administer one of the drills which are

known to rapidly increase the coagulability of the blood.
Calcium lactate, calcium chloride, and magnesium
carbonate have all been shown to produce this effect in
a marked degree within the space of an hour or so ; the

salt selected should be administered in a single dose of
3] the night before the proposed operation.
The best and most pleasant to take is calcium lactate,
which may be administered in compressed tablets or in a

draught such as the following :
Syrup ....... q.s.
fy Calcii lactatis . . . . . . 5j.

Aq. ad. . . . . . . . 5J.
Fiat haustus.—To be taken as a draught the night before the
dental extraction takes place.
The effect of these salts appears to last about three
to four days, so that in the event of dental extractions

being performed on successive days a second dose is not
called for.