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Ординатура / Офтальмология / Английские материалы / Minimally Invasive Ophthalmic Surgery_Fine, Mojon_2010.pdf
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38

R. K. Weber

¥If the middle turbinate comes too close to the opened lacrimal sac it should be medialised (e.g. transseptal suture technique, bolgerisation) or reduced if necessary.

The patency of the DCR is checked by a lacrimal probe passed into the nose via the inferior canaliculus, which is seen in the nasal fossa and by irrigation of the canaliculi with saline.

Depending on the amount of bleeding, additional endonasal packing can be introduced for some hours or days.

Fig. 3.4 Oedema and granulation around the silicone tubing (endoscopic view, 45¡ endoscope)

3.2.3 Silicone Stenting for EDCR

In normal cases of post-saccal stenosis and uncomplicated operation, the author uses no silicone stenting.

Whether the use of silicone tubes increases the success rate of lacrimal surgery, particularly when there is no canalicular stenosis, has not been conclusively established [94]. Although some authors report higher success rates with silicone stenting [48], either the results were not statistically signiÞcant and/or the studies were retrospective and methodologically ßawed so that no reliable conclusions can be drawn in this respect. Other studies found no difference [82].

In a recent prospective study on 46 patients, the overall success rate after primary EN-DCR was 89%: with silicone tubes it was 78%, and without silicone tubes it was 100% [70]. It must be borne in mind that

silicone stenting can be associated with complications such as punctal erosion, slitting of the canaliculi, elongation of the puncta, development of granulomata in the region of the puncta, the lacrimal sac or the lateral nasal wall, dislocation, corneal irritation, difÞculties with removal, endonasal crust formation, edema, granulations and secretion [2, 67], (Fig. 3.4).

The author is therefore of the opinion that routine stenting is not indicated with conventional endonasal DCR except in the case of a pre-saccal stenosis or difÞcult revision cases with Þbrosis inside the lacrimal sac.

The stent is Þxed using titanium clips and left in situ for 6 months in cases of pre-saccal stenosis or at least 3 months in revision cases (Fig. 3.5).

a

b

Fig. 3.5 Silicone tubing of the lacrimal system after endonasal DCR. (a) The probe enters the sac via the canalis communis. (b) Fixation using titanium clips (endoscopic view, 45¡ endoscope)