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Ho Young Song - One of the best experts on this subject based on the ideXlab platform.
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Efficacy of mitomycin-C irrigation after balloon dacryocystoplasty.
Journal of Vascular and Interventional Radiology, 2007Co-Authors: Ho Young Song, Ji Hoon Shin, Eugene K. Choi, Zheng Qiang YangAbstract:Purpose To evaluate the safety and efficacy of mitomycin-C irrigation after balloon dacryocystoplasty in the treatment of epiphora caused by obstruction of the Lacrimal System. Materials and Methods Thirty-five Lacrimal Systems in 33 patients with obstruction of the Lacrimal System were assigned to one of two groups: 17 Lacrimal Systems were irrigated with mitomycin-C after balloon dacryocystoplasty (mytomycin-C group), and 18 were not irrigated with mitomycin-C after balloon dacryocystoplasty (non–mitomycin-C group). In the mitomycin-C group, the Lacrimal Systems were irrigated with 0.2 mg/mL mitomycin-C via the inferior Lacrimal punctum in three different sessions: immediately, 1 week, and 1 month after balloon dacryocystoplasty. The cumulative patency rates after balloon dacryocystoplasty were calculated by using the Kaplan-Meier method and were compared between the two groups with use of the log-rank test. Results Balloon dacryocystoplasty and subsequent mitomycin-C irrigation were technically successful in all Lacrimal Systems. There were no side effects or complications associated with mitomycin-C use. The cumulative patency rate in the mitomycin-C group was significantly higher than that in the non–mitomycin-C group after balloon dacryocystoplasty ( P = .0150, log-rank test). Conclusions Mitomycin-C irrigation is safe and effective in increasing the patency rate of the Lacrimal System after balloon dacryocystoplasty.
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obstruction of the Lacrimal System treatment with a covered retrievable expandable nitinol stent versus a Lacrimal polyurethane stent
Radiology, 2003Co-Authors: Giyoung Ko, Ho Young Song, Kyubo Sung, Hyunki YoonAbstract:PURPOSE: To compare the clinical effectiveness of a covered nitinol stent with that of a polyurethane stent for treatment of Lacrimal System obstructions. MATERIALS AND METHODS: A nitinol stent was knit from a single thread of 0.1-mm nitinol wire in a tubular configuration and was covered by dipping the stent into a polyurethane solution. The stent was 4 mm in diameter and 30 or 35 mm long. With fluoroscopic guidance, a covered nitinol stent (n = 33, group A) or a polyurethane stent (n = 35, group B) was placed in 68 patients. The following items were evaluated retrospectively: technical success, procedure time, cumulative patency rate, and complications. An unpaired Student t test was used to analyze the difference between the procedure times. Kaplan-Meier survival curves and a log-rank test were used to compare the cumulative patency rates. RESULTS: Stent placement was technically successful in 31 (94%) of 33 patients in group A and in all 35 (100%) patients in group B. After stent placement, all patien...
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congenital Lacrimal System obstruction treatment with balloon dilation
Journal of Vascular and Interventional Radiology, 2000Co-Authors: Ho Young Song, Giyoung Ko, Chonghyun Yoon, Hyunki Yoon, Kyubo SungAbstract:PURPOSE To evaluate the safety and effectiveness of balloon dilation for the treatment of congenital Lacrimal System obstruction. MATERIALS AND METHODS Fluoroscopically guided balloon dilation was attempted in 20 eyes of 16 patients with an age range of 12–78 months (mean, 33 mo) for congenital Lacrimal System obstruction. Fifteen eyes had complete obstruction at the valve of Hasner, three eyes had completely obstruction at the junction between the Lacrimal sac and the nasoLacrimal duct, and two eyes had partial obstruction at the nasoLacrimal duct. Under general anesthesia, a ball-tipped guide wire was introduced through the superior punctum into the inferior meatus of the nasal cavity and pulled out through the naris with use of a hook. A deflated 3-mm-diameter balloon catheter was then advanced in a retrograde direction and the balloon was dilated. Every patient underwent an ophthalmic evaluation before the procedure and was scheduled to be followed with office examination at 1, 3, and 6 months after the procedure. RESULTS There were no major complications. "Technical success" was defined as free passage of contrast medium through the entire Lacrimal System to the nasal cavity. The procedure failed in one eye. After balloon dilation, all 19 eyes in which technical success was achieved showed improvement of epiphora. During the follow-up period of 2–33 months (mean, 16 mo), all eyes maintained improvement of epiphora and needed no further treatment. CONCLUSION Balloon dilation is a safe and effective therapeutic technique for the treatment of congenital Lacrimal System obstruction.
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balloon catheter dilation in common canalicular obstruction of the Lacrimal System safety and long term effectiveness
Radiology, 2000Co-Authors: Giyoung Ko, Hyunki Yoon, Kyubo Sung, Ho Young SongAbstract:PURPOSE: To evaluate the safety and long-term effectiveness of balloon catheter dilation in the treatment of common canalicular obstruction of the Lacrimal System. MATERIALS AND METHODS: Fluoroscopically guided dilation with a 3-mm-diameter balloon catheter was attempted in 195 eyes of 148 patients (26 men, 122 women; mean age, 57 years; age range, 33-78 years) with epiphora due to common canalicular obstruction. Eighty-four of 195 eyes had complete obstruction, and 111 had partial obstruction. RESULTS: Complications were self-limited nasal bleeding (n = 8), false passage (n = 7), and extravasation of contrast material (n = 6). Initial technical success was achieved in 76 (90%) of 84 eyes with complete obstruction and in 104 (94%) of 111 eyes with partial obstruction. In the 180 eyes with technical success, immediate clinical improvement was achieved in 76 eyes with complete obstruction and in 100 eyes with partial obstruction. The mean follow-up period was 36 weeks (range, 4-168 weeks). The cumulative patency rates were 51% at 6-month, 43% at 12-month, and 40% at 24-month follow-up. CONCLUSION: Although the long-term recurrence rate is relatively high, balloon catheter dilation is a safe and effective therapeutic technique to be used initially in common canalicular obstruction.
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Lacrimal System obstruction treated with Lacrimal polyurethane stents outcome of removal of occluded stents
Radiology, 1998Co-Authors: Ho Young Song, Hyunki Yoon, Sung Gwon Kang, Kyubo SungAbstract:PURPOSE: To describe the short- and long-term outcomes of the removal of occluded stents. MATERIALS AND METHODS: With fluoroscopic guidance, 571 Lacrimal polyurethane stents were placed in 502 patients with epiphora due to obstruction of the Lacrimal System. Of the 571 stents, 142 were removed 2 weeks to 42 months (mean, 7 months) after placement because of recurrent epiphora, and the Lacrimal System was irrigated with saline solution through the Lacrimal point. RESULTS: Stent removal was well tolerated. Mild epistaxis occurred in one patient and was controlled with a nasal pack. Recurrent epiphora was due to obstruction of the stent with mucoid material in 49 (35%) of 142 Systems and granulation tissue in 93 (65%) Systems. After stent removal, 73 (51%) of the 142 Lacrimal Systems showed improvement of epiphora, with a patent Lacrimal System at 7-day follow-up dacryocystography. During the follow-up of 2 weeks to 49 months (mean, 22 months) after stent removal, patency was maintained in 24 (33%) of the 73...
Kyubo Sung - One of the best experts on this subject based on the ideXlab platform.
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obstruction of the Lacrimal System treatment with a covered retrievable expandable nitinol stent versus a Lacrimal polyurethane stent
Radiology, 2003Co-Authors: Giyoung Ko, Ho Young Song, Kyubo Sung, Hyunki YoonAbstract:PURPOSE: To compare the clinical effectiveness of a covered nitinol stent with that of a polyurethane stent for treatment of Lacrimal System obstructions. MATERIALS AND METHODS: A nitinol stent was knit from a single thread of 0.1-mm nitinol wire in a tubular configuration and was covered by dipping the stent into a polyurethane solution. The stent was 4 mm in diameter and 30 or 35 mm long. With fluoroscopic guidance, a covered nitinol stent (n = 33, group A) or a polyurethane stent (n = 35, group B) was placed in 68 patients. The following items were evaluated retrospectively: technical success, procedure time, cumulative patency rate, and complications. An unpaired Student t test was used to analyze the difference between the procedure times. Kaplan-Meier survival curves and a log-rank test were used to compare the cumulative patency rates. RESULTS: Stent placement was technically successful in 31 (94%) of 33 patients in group A and in all 35 (100%) patients in group B. After stent placement, all patien...
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congenital Lacrimal System obstruction treatment with balloon dilation
Journal of Vascular and Interventional Radiology, 2000Co-Authors: Ho Young Song, Giyoung Ko, Chonghyun Yoon, Hyunki Yoon, Kyubo SungAbstract:PURPOSE To evaluate the safety and effectiveness of balloon dilation for the treatment of congenital Lacrimal System obstruction. MATERIALS AND METHODS Fluoroscopically guided balloon dilation was attempted in 20 eyes of 16 patients with an age range of 12–78 months (mean, 33 mo) for congenital Lacrimal System obstruction. Fifteen eyes had complete obstruction at the valve of Hasner, three eyes had completely obstruction at the junction between the Lacrimal sac and the nasoLacrimal duct, and two eyes had partial obstruction at the nasoLacrimal duct. Under general anesthesia, a ball-tipped guide wire was introduced through the superior punctum into the inferior meatus of the nasal cavity and pulled out through the naris with use of a hook. A deflated 3-mm-diameter balloon catheter was then advanced in a retrograde direction and the balloon was dilated. Every patient underwent an ophthalmic evaluation before the procedure and was scheduled to be followed with office examination at 1, 3, and 6 months after the procedure. RESULTS There were no major complications. "Technical success" was defined as free passage of contrast medium through the entire Lacrimal System to the nasal cavity. The procedure failed in one eye. After balloon dilation, all 19 eyes in which technical success was achieved showed improvement of epiphora. During the follow-up period of 2–33 months (mean, 16 mo), all eyes maintained improvement of epiphora and needed no further treatment. CONCLUSION Balloon dilation is a safe and effective therapeutic technique for the treatment of congenital Lacrimal System obstruction.
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balloon catheter dilation in common canalicular obstruction of the Lacrimal System safety and long term effectiveness
Radiology, 2000Co-Authors: Giyoung Ko, Hyunki Yoon, Kyubo Sung, Ho Young SongAbstract:PURPOSE: To evaluate the safety and long-term effectiveness of balloon catheter dilation in the treatment of common canalicular obstruction of the Lacrimal System. MATERIALS AND METHODS: Fluoroscopically guided dilation with a 3-mm-diameter balloon catheter was attempted in 195 eyes of 148 patients (26 men, 122 women; mean age, 57 years; age range, 33-78 years) with epiphora due to common canalicular obstruction. Eighty-four of 195 eyes had complete obstruction, and 111 had partial obstruction. RESULTS: Complications were self-limited nasal bleeding (n = 8), false passage (n = 7), and extravasation of contrast material (n = 6). Initial technical success was achieved in 76 (90%) of 84 eyes with complete obstruction and in 104 (94%) of 111 eyes with partial obstruction. In the 180 eyes with technical success, immediate clinical improvement was achieved in 76 eyes with complete obstruction and in 100 eyes with partial obstruction. The mean follow-up period was 36 weeks (range, 4-168 weeks). The cumulative patency rates were 51% at 6-month, 43% at 12-month, and 40% at 24-month follow-up. CONCLUSION: Although the long-term recurrence rate is relatively high, balloon catheter dilation is a safe and effective therapeutic technique to be used initially in common canalicular obstruction.
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Lacrimal System obstruction treated with Lacrimal polyurethane stents outcome of removal of occluded stents
Radiology, 1998Co-Authors: Ho Young Song, Hyunki Yoon, Sung Gwon Kang, Kyubo SungAbstract:PURPOSE: To describe the short- and long-term outcomes of the removal of occluded stents. MATERIALS AND METHODS: With fluoroscopic guidance, 571 Lacrimal polyurethane stents were placed in 502 patients with epiphora due to obstruction of the Lacrimal System. Of the 571 stents, 142 were removed 2 weeks to 42 months (mean, 7 months) after placement because of recurrent epiphora, and the Lacrimal System was irrigated with saline solution through the Lacrimal point. RESULTS: Stent removal was well tolerated. Mild epistaxis occurred in one patient and was controlled with a nasal pack. Recurrent epiphora was due to obstruction of the stent with mucoid material in 49 (35%) of 142 Systems and granulation tissue in 93 (65%) Systems. After stent removal, 73 (51%) of the 142 Lacrimal Systems showed improvement of epiphora, with a patent Lacrimal System at 7-day follow-up dacryocystography. During the follow-up of 2 weeks to 49 months (mean, 22 months) after stent removal, patency was maintained in 24 (33%) of the 73...
Victor M Elner - One of the best experts on this subject based on the ideXlab platform.
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double silicone tube intubation for the management of partial Lacrimal System obstruction
Ophthalmology, 2008Co-Authors: Hakan Demirci, Victor M ElnerAbstract:Objective To evaluate the effectiveness of double silicone intubation for the management of partial Lacrimal drainage System obstruction in adults. Design Observational retrospective case series. Participants Twenty-four eyes of 18 consecutive adult patients with partial Lacrimal System obstruction managed at the University of Michigan. Methods Retrospective review of symptoms and signs, duration of silicone intubation, and complications. Main Outcome Measure Resolution of tearing. Results Preoperative tearing, negative Jones I testing, positive Jones II testing, and resistance to positive-pressure irrigation were present in all eyes (100%). The first silicone tube was removed after a mean of 11±7 months, and the second tube after 16±6 months. Postoperatively, at a mean of 21±9 months after removal of both tubes, tearing remained resolved in 19 eyes (79%) and remained improved in 2 eyes (8%). In eyes with resolved tearing, Jones I testing became positive, and there was no resistance to positive-pressure irrigation. Persistent tearing in 3 eyes (13%) required treatment with external dacryocystorhinostomy. The only complication was peripunctal pyogenic granulomas in 2 eyes. Conclusion Double silicone intubation is an effective minimally invasive technique for treatment of partial Lacrimal System obstruction in adults.
Hyunki Yoon - One of the best experts on this subject based on the ideXlab platform.
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obstruction of the Lacrimal System treatment with a covered retrievable expandable nitinol stent versus a Lacrimal polyurethane stent
Radiology, 2003Co-Authors: Giyoung Ko, Ho Young Song, Kyubo Sung, Hyunki YoonAbstract:PURPOSE: To compare the clinical effectiveness of a covered nitinol stent with that of a polyurethane stent for treatment of Lacrimal System obstructions. MATERIALS AND METHODS: A nitinol stent was knit from a single thread of 0.1-mm nitinol wire in a tubular configuration and was covered by dipping the stent into a polyurethane solution. The stent was 4 mm in diameter and 30 or 35 mm long. With fluoroscopic guidance, a covered nitinol stent (n = 33, group A) or a polyurethane stent (n = 35, group B) was placed in 68 patients. The following items were evaluated retrospectively: technical success, procedure time, cumulative patency rate, and complications. An unpaired Student t test was used to analyze the difference between the procedure times. Kaplan-Meier survival curves and a log-rank test were used to compare the cumulative patency rates. RESULTS: Stent placement was technically successful in 31 (94%) of 33 patients in group A and in all 35 (100%) patients in group B. After stent placement, all patien...
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congenital Lacrimal System obstruction treatment with balloon dilation
Journal of Vascular and Interventional Radiology, 2000Co-Authors: Ho Young Song, Giyoung Ko, Chonghyun Yoon, Hyunki Yoon, Kyubo SungAbstract:PURPOSE To evaluate the safety and effectiveness of balloon dilation for the treatment of congenital Lacrimal System obstruction. MATERIALS AND METHODS Fluoroscopically guided balloon dilation was attempted in 20 eyes of 16 patients with an age range of 12–78 months (mean, 33 mo) for congenital Lacrimal System obstruction. Fifteen eyes had complete obstruction at the valve of Hasner, three eyes had completely obstruction at the junction between the Lacrimal sac and the nasoLacrimal duct, and two eyes had partial obstruction at the nasoLacrimal duct. Under general anesthesia, a ball-tipped guide wire was introduced through the superior punctum into the inferior meatus of the nasal cavity and pulled out through the naris with use of a hook. A deflated 3-mm-diameter balloon catheter was then advanced in a retrograde direction and the balloon was dilated. Every patient underwent an ophthalmic evaluation before the procedure and was scheduled to be followed with office examination at 1, 3, and 6 months after the procedure. RESULTS There were no major complications. "Technical success" was defined as free passage of contrast medium through the entire Lacrimal System to the nasal cavity. The procedure failed in one eye. After balloon dilation, all 19 eyes in which technical success was achieved showed improvement of epiphora. During the follow-up period of 2–33 months (mean, 16 mo), all eyes maintained improvement of epiphora and needed no further treatment. CONCLUSION Balloon dilation is a safe and effective therapeutic technique for the treatment of congenital Lacrimal System obstruction.
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balloon catheter dilation in common canalicular obstruction of the Lacrimal System safety and long term effectiveness
Radiology, 2000Co-Authors: Giyoung Ko, Hyunki Yoon, Kyubo Sung, Ho Young SongAbstract:PURPOSE: To evaluate the safety and long-term effectiveness of balloon catheter dilation in the treatment of common canalicular obstruction of the Lacrimal System. MATERIALS AND METHODS: Fluoroscopically guided dilation with a 3-mm-diameter balloon catheter was attempted in 195 eyes of 148 patients (26 men, 122 women; mean age, 57 years; age range, 33-78 years) with epiphora due to common canalicular obstruction. Eighty-four of 195 eyes had complete obstruction, and 111 had partial obstruction. RESULTS: Complications were self-limited nasal bleeding (n = 8), false passage (n = 7), and extravasation of contrast material (n = 6). Initial technical success was achieved in 76 (90%) of 84 eyes with complete obstruction and in 104 (94%) of 111 eyes with partial obstruction. In the 180 eyes with technical success, immediate clinical improvement was achieved in 76 eyes with complete obstruction and in 100 eyes with partial obstruction. The mean follow-up period was 36 weeks (range, 4-168 weeks). The cumulative patency rates were 51% at 6-month, 43% at 12-month, and 40% at 24-month follow-up. CONCLUSION: Although the long-term recurrence rate is relatively high, balloon catheter dilation is a safe and effective therapeutic technique to be used initially in common canalicular obstruction.
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Lacrimal System obstruction treated with Lacrimal polyurethane stents outcome of removal of occluded stents
Radiology, 1998Co-Authors: Ho Young Song, Hyunki Yoon, Sung Gwon Kang, Kyubo SungAbstract:PURPOSE: To describe the short- and long-term outcomes of the removal of occluded stents. MATERIALS AND METHODS: With fluoroscopic guidance, 571 Lacrimal polyurethane stents were placed in 502 patients with epiphora due to obstruction of the Lacrimal System. Of the 571 stents, 142 were removed 2 weeks to 42 months (mean, 7 months) after placement because of recurrent epiphora, and the Lacrimal System was irrigated with saline solution through the Lacrimal point. RESULTS: Stent removal was well tolerated. Mild epistaxis occurred in one patient and was controlled with a nasal pack. Recurrent epiphora was due to obstruction of the stent with mucoid material in 49 (35%) of 142 Systems and granulation tissue in 93 (65%) Systems. After stent removal, 73 (51%) of the 142 Lacrimal Systems showed improvement of epiphora, with a patent Lacrimal System at 7-day follow-up dacryocystography. During the follow-up of 2 weeks to 49 months (mean, 22 months) after stent removal, patency was maintained in 24 (33%) of the 73...
Hakan Demirci - One of the best experts on this subject based on the ideXlab platform.
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double silicone tube intubation for the management of partial Lacrimal System obstruction
Ophthalmology, 2008Co-Authors: Hakan Demirci, Victor M ElnerAbstract:Objective To evaluate the effectiveness of double silicone intubation for the management of partial Lacrimal drainage System obstruction in adults. Design Observational retrospective case series. Participants Twenty-four eyes of 18 consecutive adult patients with partial Lacrimal System obstruction managed at the University of Michigan. Methods Retrospective review of symptoms and signs, duration of silicone intubation, and complications. Main Outcome Measure Resolution of tearing. Results Preoperative tearing, negative Jones I testing, positive Jones II testing, and resistance to positive-pressure irrigation were present in all eyes (100%). The first silicone tube was removed after a mean of 11±7 months, and the second tube after 16±6 months. Postoperatively, at a mean of 21±9 months after removal of both tubes, tearing remained resolved in 19 eyes (79%) and remained improved in 2 eyes (8%). In eyes with resolved tearing, Jones I testing became positive, and there was no resistance to positive-pressure irrigation. Persistent tearing in 3 eyes (13%) required treatment with external dacryocystorhinostomy. The only complication was peripunctal pyogenic granulomas in 2 eyes. Conclusion Double silicone intubation is an effective minimally invasive technique for treatment of partial Lacrimal System obstruction in adults.
