These properties of Merocel allow us to leave Merocel for longer duration, we find 72 hours is optimum time for flaps to adhered to underlying and surrounding tissue and these mucosal flaps get stabilized resulting in well mucosalized wide lacrimal sac
No eyelid, orbit, canaliculus or lacrimal sac
involvement was observed.
Baek, "Aquaporin expression in the lacrimal sac
of patients with primary and functional nasolacrimal duct obstruction," British Journal of Ophthalmology, vol.
His mother was instmcted to massage the lacrimal sac
at least four times a day.
Dacryocystorhinostomy (DCR) is a surgical procedure which involves the diversion of lacrimal flow into the nasal cavity by creating an opening at the level of lacrimal sac
. This operation can be performed by external approach as well as by intranasal approach.
Those patients with intact middle lacrimal drainage system (lacrimal sac
) underwent CDCR surgery, whereas, for those patients with involved middle lacrimal drainage system, CR surgery method was preferred.
Various changes in surgical procedure of dacryocystorhinostomy have been introduced to acquire a good surgical success rate.1 Basic concept of various procedures is to create a fistula between lacrimal sac
and nasal cavity for the drainage of tears.
The production of the tears and removal of excess tears is the function of lacrimal apparatus which consist of lacrimal glands, puncti, canaliculi, lacrimal sac
and nasolacrimal duct.
The classical operation was first introduced by Toti1 in 1942 and modified by Bourguet.2 It involves external incision over the lacrimal sac
and creation of a fistula through the nasal bone directly into the nasal cavity.
Tear fluid is produced superolaterally in the lacrimal gland and drains medially from the corneal surface via the superior and inferior lacrimal puncta into the lacrimal canaliculi, the lacrimal sac
, the nasolacrimal duct, and, finally, through a distal orifice, into the inferior nasal meatus.
Lacrimal fluid drains through the puncta into the lacrimal canaliculi and then into the lacrimal sac
behind the medial canthal tendon.
The excretory portion comprises the drainage system which starts in the lacrimal puncta, followed by the lacrimal canaliculi; lacrimal sac
and nasolacrimal duct (GRAHN & STOREY, 2004).
This can lead to red, swollen tear sacs - the medical term is dacryocystitis, or lacrimal sac
An infection and swelling of the lacrimal sac
, it is treated with antibiotics.
The tear ducts lead to the tear, or lacrimal sac
, and then to the nasal duct.