The extreme inner edge of the cleft velum should be seized near the base
of the half uvula with the catch forceps (Fig. 62). The narrow-bladed
knife (Fig. 61C) is entered with the back towards the tongue, just
in front of the forceps, and made to cut the merest shaving from the
margin as far as the apex of the cleft. Before relaxing the grasp of
the forceps, the same process is continued backwards to the apex of
the half uvula. The other side of the cleft is similarly treated, and,
if possible, the strip of marginal tissue removed should be continuous
throughout, thus satisfactorily proving that the whole of the cleft
has been pared. This strip should be cut square with the palate, for
if bevelled, the edges cannot afterwards be brought into such accurate
apposition.
Care should be taken in this proceeding not to contravene the important
canon of plastic surgery, that no unnecessary amount of tissue should be
removed; for it is most important to remember that in these cases, there
is no excess of material, and that a too free removal of marginal tissue
will lead to increased tension in the united palate, and subsequently
to a less satisfactory functional result from defective closure of the
posterior nares.
STAGE III.—_Passage and Tightening of Sutures._
The quickest method and the one calculated to disturb the parts the
least is a modification of that introduced and practised by the late
Sir William Fergusson, the so-called “loop-method.” It consists in the
passage of a loop of fine silk through both sides of the cleft, to act as
a carrier for the silver wire which is to be the permanent suture. One
of the needles already described, previously threaded with a piece of
fine silk about sixteen inches in length, so that its ends are equal, is
passed from the buccal aspect through the loose flap close to the margin
of the cleft (_i. e._ about 2 or 3 mm. from it), and as near as possible
to its anterior extremity. To accomplish this it is unnecessary to hold
the flap with forceps, as its margin may be seriously damaged. The needle
track should be perpendicular to the palate surface, and therefore
parallel to the pared margin of the cleft. The silk is then seized
close to the eye of the needle with the smooth-nosed forceps introduced
within the cleft, the needle withdrawn, and the loop pulled forwards
sufficiently to be laid temporarily on the side of the cheek. The same
process is repeated at an exactly corresponding point on the opposite
side, so that now there are two loops emerging from behind forwards
through the cleft. By loosely threading the right loop through the left
and gently withdrawing the latter, the former is carried through the flap
on the left side (Fig. 69); in this way we have a double thread, with its
loop on the left side and its free ends on the right, passing through
the flaps on either side. This process is repeated at intervals of about
5 to 6 mm. throughout the length of the cleft from before backwards,
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