The role of larger osteotomy in long term success in external dacryocystorhinostomy

Endoscopic assessment of the dacryocystorhinostomy ostium after powered endoscopic surgery: behaviour beyond 4 weeks

“…The degree to which an ostium constricts from its initial per‐operative size is variable with wide reported ranges of 20–98 % . This variability may not only be influenced by surgical and patient factors but may also reflect different methods employed to create and measure the ostium and different time points.…”

“…[1][2][3][4][5][6][7][8] The degree to which an ostium constricts from its initial per-operative size is variable with wide reported ranges of 20-98 %. [9][10][11][12][13][14][15][16][17] This variability may not only be influenced by surgical and patient factors but may also reflect different methods employed to create and measure the ostium and different time points. Among the numerous techniques that have been described to measure healed DCR ostium sizes are physical measurement with scales, marked Bowman's probes and olive tip suction canula of known dimensions as well as radiological measurement using ultrasonography, CT scan imaging and digital subtraction macrodacyrocystography.…”

“…Among the numerous techniques that have been described to measure healed DCR ostium sizes are physical measurement with scales, marked Bowman's probes and olive tip suction canula of known dimensions as well as radiological measurement using ultrasonography, CT scan imaging and digital subtraction macrodacyrocystography. [9][10][11][12][13][14][15][16][17] Studies examining ostial shrinkage within the first 4 weeks following powered endoscopic DCR's report shrinkage of approximately 25% when an adequate sized osteotomy is performed with complete sac marsupialization and good mucosa to mucosa apposition. 12,13 Little is known however about the further behaviour of the ostium beyond 4 weeks and longer.…”

The role of lacrimal stent in endoscopic dacryocystorhinostomy

“…However, sometimes there is a limitation in resection of the superior part with the rongeur; then, a diamond DCR bur (High Speed Diamond DCR Bur Ò , 2.5 mm, 20 curved, Medtronic Xomed, Inc., FL, USA) is introduced. The questioner has mentioned articles [2,3] recommending creation of a 15-20 mm antero-posterior diameter osteotomy. Because we do not perform postoperative computed tomography (CT) scans, we have no data on how large we make bone resections in length, but we estimate that it is around 10 mm antero-posteriorly.…”

Endonasal dacryocystorhinostomy: evaluation of the anatomical and functional results

“…[9][10][11] However there are limited studies in literature demonstrating sequence of post-operative ostium shrinkage as well as a definite correlation between ostium size and surgical success. [12][13][14] Controversy still revolves around the progression of lacrimal ostium shrinkage after surgery.…”