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Mitsuko Yuzawa - One of the best experts on this subject based on the ideXlab platform.

  • Reducing bacterial contamination inside Fluid catch bag in 25-gauge vitrectomy by use of 0.25 % povidone-iodine ocular surface irrigation
    International Ophthalmology, 2013
    Co-Authors: Hiroyuki Shimada, Yorihisa Kitagawa, Ayumu Manabe, Kuon Otani, Hiroyuki Nakashizuka, Takayuki Hattori, Mitsuko Yuzawa
    Abstract:

    To examine the bacterial detection rate in Infusion Fluid collected inside the Fluid catch bag during 25-gauge (25G) vitrectomy when the ocular surface was irrigated with Infusion Fluid or 0.25 % povidone-iodine. Two groups using different Fluids for ocular surface irrigation during 25G vitrectomy were studied. Fifty-five consecutive eyes received ocular surface irrigation with Infusion Fluid (IF group) and 52 consecutive eyes with 0.25 % povidone-iodine (PI group). Samples of ocular surface Fluid were collected at the beginning of surgery and samples of Infusion Fluid inside the Fluid catch bag were collected at the end of surgery for bacteriological cultures. At the beginning of surgery, the bacterial detection rates in ocular surface Fluid samples were 5.8 % (3 of 52 eyes) in the IF group and 7.7 % (4 of 52 eyes) in the PI group, with no significant difference (P = 0.6955). At the end of surgery, the bacterial detection rates in Infusion Fluid collected inside the Fluid catch bag were 23.1 % (12 of 52 eyes) in the IF group and 3.8 % (2 of 52 eyes) in the PI group, with a significant difference (P = 0.0041). No endophthalmitis occurred in either group. These results demonstrate the risk of bacterial contamination when surgical instruments fall accidentally into the Fluid catch bag during conventional 25G vitrectomy. Irrigating the ocular surface with 0.25 % povidone-iodine instead of Infusion Fluid significantly reduces the bacterial contamination rate in the Fluid catch bag.

  • Clear visualization of anterior vitreous incarceration into cannulae during 25-gauge vitrectomy in eyes with asteroid hyalosis.
    European journal of ophthalmology, 2012
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Ryusaburo Mori, Yoshihiro Mizutani, Mitsuko Yuzawa
    Abstract:

    PURPOSE To demonstrate anterior vitreous incarceration in the cannulae at 3 ports during 25-gauge vitrectomy in eyes with asteroid hyalosis. METHODS In 6 eyes with asteroid hyalosis, 3-port 25-gauge pars plana vitrectomy was conducted using conventional 25-gauge cannula (4 eyes) or 25-gauge EdgePlusTM trocar/cannula system (2 eyes). The relationship between the cannulae and anterior vitreous was observed during surgery. RESULTS The 3 ports were observed at the beginning of vitrectomy. At the Infusion port, incarceration of anterior vitreous containing asteroid bodies between the cannula and the Infusion tip was clearly observed in all 6 eyes, irrespective of the cannula used. When the incarcerated vitreous fibers were excised using a vitreous cutter, the Infusion Fluid flowed toward the center of the vitreous. At both the left and right ports, anterior vitreous containing asteroid bodies was incarcerated into the cannulae in all 6 eyes irrespective of the cannula used. The incarcerated vitreous fibers were excised. At the end of surgery, no vitreous prolapse was found at the 3 ports in all eyes. CONCLUSIONS When using the 25-gauge cannula system, incarceration of anterior vitreous fibers into the cannulae of 3 ports from the beginning of surgery was clearly depicted in eyes with asteroid hyalosis. Excising the incarcerated anterior vitreous fibers is useful to ensure good perfusion and prevent vitreous prolapse.

  • reduction of anterior chamber contamination rate after cataract surgery by intraoperative surface irrigation with 0 25 povidone iodine
    American Journal of Ophthalmology, 2011
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Shinzi Arai, Mitsuko Yuzawa
    Abstract:

    Purpose To prove the hypothesis that during cataract surgery, repeated irrigation of the operative field with povidone–iodine of 0.25% reduces the anterior chamber bacterial contamination rate at completion of operation. Design Prospective, interventional case series. Methods In 404 consecutive eyes, the operative field was irrigated with Infusion Fluid in 202 eyes (group A) and with 0.25% povidone–iodine in 202 eyes (group B). Bacteriologic culture was performed using the following samples: ocular surface Fluid after lid speculum placement and anterior chamber Fluid at the completion of surgery. Anterior chamber Fluid samples were collected at the beginning and completion of surgery for iodide ion concentration measurement. Corneal endothelial cell density was measured using a specular microscope before surgery and on day 7 after surgery. Results Bacterial detection rate in ocular surface Fluid was not significantly different between group A (5.5%) and group B (6.0%), but the rate in anterior chamber Fluid was significantly ( P = .0017) reduced in group B (0%) compared with group A (5.0%). Iodide ion concentrations at the start and end of surgery were 7.5 ± 0.7 μg/mL and 3.5 ± 0.7 μg/mL, respectively, in group B and less than 0.1 μg/mL both at the start and end of surgery in group A. Corneal endothelial cell densities were not significantly difference between groups A and B before surgery (2614 ± 233/mm 2 vs 2534 ± 173/mm 2 ; P = .2254) and 7 days after surgery (2463 ± 269/mm 2 vs 2338 ± 204/mm 2 ; P = .4044). Conclusions In cataract surgery, repeated irrigation of the operative field with povidone–iodine at a concentration of 0.25% achieved an extremely low bacterial contamination rate in the anterior chamber at the completion of surgery.

  • effect of operative field irrigation on intraoperative bacterial contamination and postoperative endophthalmitis rates in 25 gauge vitrectomy
    Retina-the Journal of Retinal and Vitreous Diseases, 2010
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Ryusaburo Mori, Yoshihiro Mizutani, Mitsuko Yuzawa
    Abstract:

    PURPOSE: The purpose of this study was to compare bacterial contamination and endophthalmitis rates with different irrigation methods in 25-gauge vitrectomy. METHODS: A total of 4,347 eyes undergoing 25-gauge vitrectomy were studied prospectively. Of these, 2,801 eyes were irrigated with Infusion Fluid (group A) and 1,546 with 1.25% povidone-iodine (group B) after lid speculum placement. Bacteriologic culture was performed for 103 eyes in group A and 155 eyes in group B using the following samples: ocular surface Fluid after placement of the lid speculum (left eye 1), ocular surface Fluid after operative field irrigation (left eye 2), vitreous collected after angled incision made while some irrigation Fluid remains in the conjunctival sac (V1), and vitreous at the completion of vitrectomy (V2). RESULTS: The bacterial contamination rate in left eye 1 did not differ significantly between groups A (5.5%) and B (5.8%). However, the rates in left eye 2, V1, and V2 were lower in group B (0%, 0%, and 0.6%, respectively) than in group A (2.0%, 1.0%, and 2.0%). Incidences of endophthalmitis were 0 of 2,801 eyes and 0 of 1,546 eyes in groups A and B, respectively. CONCLUSION: After lid speculum placement, ocular surface contamination occurred in approximately 6% of eyes. Irrigating the operative field again with 1.25% povidone-iodine and performing sclerotomy with some povidone-iodine remaining in the conjunctival sac prevented bacterial contamination of the vitreous.

Hiroyuki Shimada - One of the best experts on this subject based on the ideXlab platform.

  • Reducing bacterial contamination inside Fluid catch bag in 25-gauge vitrectomy by use of 0.25 % povidone-iodine ocular surface irrigation
    International Ophthalmology, 2013
    Co-Authors: Hiroyuki Shimada, Yorihisa Kitagawa, Ayumu Manabe, Kuon Otani, Hiroyuki Nakashizuka, Takayuki Hattori, Mitsuko Yuzawa
    Abstract:

    To examine the bacterial detection rate in Infusion Fluid collected inside the Fluid catch bag during 25-gauge (25G) vitrectomy when the ocular surface was irrigated with Infusion Fluid or 0.25 % povidone-iodine. Two groups using different Fluids for ocular surface irrigation during 25G vitrectomy were studied. Fifty-five consecutive eyes received ocular surface irrigation with Infusion Fluid (IF group) and 52 consecutive eyes with 0.25 % povidone-iodine (PI group). Samples of ocular surface Fluid were collected at the beginning of surgery and samples of Infusion Fluid inside the Fluid catch bag were collected at the end of surgery for bacteriological cultures. At the beginning of surgery, the bacterial detection rates in ocular surface Fluid samples were 5.8 % (3 of 52 eyes) in the IF group and 7.7 % (4 of 52 eyes) in the PI group, with no significant difference (P = 0.6955). At the end of surgery, the bacterial detection rates in Infusion Fluid collected inside the Fluid catch bag were 23.1 % (12 of 52 eyes) in the IF group and 3.8 % (2 of 52 eyes) in the PI group, with a significant difference (P = 0.0041). No endophthalmitis occurred in either group. These results demonstrate the risk of bacterial contamination when surgical instruments fall accidentally into the Fluid catch bag during conventional 25G vitrectomy. Irrigating the ocular surface with 0.25 % povidone-iodine instead of Infusion Fluid significantly reduces the bacterial contamination rate in the Fluid catch bag.

  • Clear visualization of anterior vitreous incarceration into cannulae during 25-gauge vitrectomy in eyes with asteroid hyalosis.
    European journal of ophthalmology, 2012
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Ryusaburo Mori, Yoshihiro Mizutani, Mitsuko Yuzawa
    Abstract:

    PURPOSE To demonstrate anterior vitreous incarceration in the cannulae at 3 ports during 25-gauge vitrectomy in eyes with asteroid hyalosis. METHODS In 6 eyes with asteroid hyalosis, 3-port 25-gauge pars plana vitrectomy was conducted using conventional 25-gauge cannula (4 eyes) or 25-gauge EdgePlusTM trocar/cannula system (2 eyes). The relationship between the cannulae and anterior vitreous was observed during surgery. RESULTS The 3 ports were observed at the beginning of vitrectomy. At the Infusion port, incarceration of anterior vitreous containing asteroid bodies between the cannula and the Infusion tip was clearly observed in all 6 eyes, irrespective of the cannula used. When the incarcerated vitreous fibers were excised using a vitreous cutter, the Infusion Fluid flowed toward the center of the vitreous. At both the left and right ports, anterior vitreous containing asteroid bodies was incarcerated into the cannulae in all 6 eyes irrespective of the cannula used. The incarcerated vitreous fibers were excised. At the end of surgery, no vitreous prolapse was found at the 3 ports in all eyes. CONCLUSIONS When using the 25-gauge cannula system, incarceration of anterior vitreous fibers into the cannulae of 3 ports from the beginning of surgery was clearly depicted in eyes with asteroid hyalosis. Excising the incarcerated anterior vitreous fibers is useful to ensure good perfusion and prevent vitreous prolapse.

  • reduction of anterior chamber contamination rate after cataract surgery by intraoperative surface irrigation with 0 25 povidone iodine
    American Journal of Ophthalmology, 2011
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Shinzi Arai, Mitsuko Yuzawa
    Abstract:

    Purpose To prove the hypothesis that during cataract surgery, repeated irrigation of the operative field with povidone–iodine of 0.25% reduces the anterior chamber bacterial contamination rate at completion of operation. Design Prospective, interventional case series. Methods In 404 consecutive eyes, the operative field was irrigated with Infusion Fluid in 202 eyes (group A) and with 0.25% povidone–iodine in 202 eyes (group B). Bacteriologic culture was performed using the following samples: ocular surface Fluid after lid speculum placement and anterior chamber Fluid at the completion of surgery. Anterior chamber Fluid samples were collected at the beginning and completion of surgery for iodide ion concentration measurement. Corneal endothelial cell density was measured using a specular microscope before surgery and on day 7 after surgery. Results Bacterial detection rate in ocular surface Fluid was not significantly different between group A (5.5%) and group B (6.0%), but the rate in anterior chamber Fluid was significantly ( P = .0017) reduced in group B (0%) compared with group A (5.0%). Iodide ion concentrations at the start and end of surgery were 7.5 ± 0.7 μg/mL and 3.5 ± 0.7 μg/mL, respectively, in group B and less than 0.1 μg/mL both at the start and end of surgery in group A. Corneal endothelial cell densities were not significantly difference between groups A and B before surgery (2614 ± 233/mm 2 vs 2534 ± 173/mm 2 ; P = .2254) and 7 days after surgery (2463 ± 269/mm 2 vs 2338 ± 204/mm 2 ; P = .4044). Conclusions In cataract surgery, repeated irrigation of the operative field with povidone–iodine at a concentration of 0.25% achieved an extremely low bacterial contamination rate in the anterior chamber at the completion of surgery.

  • effect of operative field irrigation on intraoperative bacterial contamination and postoperative endophthalmitis rates in 25 gauge vitrectomy
    Retina-the Journal of Retinal and Vitreous Diseases, 2010
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Ryusaburo Mori, Yoshihiro Mizutani, Mitsuko Yuzawa
    Abstract:

    PURPOSE: The purpose of this study was to compare bacterial contamination and endophthalmitis rates with different irrigation methods in 25-gauge vitrectomy. METHODS: A total of 4,347 eyes undergoing 25-gauge vitrectomy were studied prospectively. Of these, 2,801 eyes were irrigated with Infusion Fluid (group A) and 1,546 with 1.25% povidone-iodine (group B) after lid speculum placement. Bacteriologic culture was performed for 103 eyes in group A and 155 eyes in group B using the following samples: ocular surface Fluid after placement of the lid speculum (left eye 1), ocular surface Fluid after operative field irrigation (left eye 2), vitreous collected after angled incision made while some irrigation Fluid remains in the conjunctival sac (V1), and vitreous at the completion of vitrectomy (V2). RESULTS: The bacterial contamination rate in left eye 1 did not differ significantly between groups A (5.5%) and B (5.8%). However, the rates in left eye 2, V1, and V2 were lower in group B (0%, 0%, and 0.6%, respectively) than in group A (2.0%, 1.0%, and 2.0%). Incidences of endophthalmitis were 0 of 2,801 eyes and 0 of 1,546 eyes in groups A and B, respectively. CONCLUSION: After lid speculum placement, ocular surface contamination occurred in approximately 6% of eyes. Irrigating the operative field again with 1.25% povidone-iodine and performing sclerotomy with some povidone-iodine remaining in the conjunctival sac prevented bacterial contamination of the vitreous.

Hiroyuki Nakashizuka - One of the best experts on this subject based on the ideXlab platform.

  • Reducing bacterial contamination inside Fluid catch bag in 25-gauge vitrectomy by use of 0.25 % povidone-iodine ocular surface irrigation
    International Ophthalmology, 2013
    Co-Authors: Hiroyuki Shimada, Yorihisa Kitagawa, Ayumu Manabe, Kuon Otani, Hiroyuki Nakashizuka, Takayuki Hattori, Mitsuko Yuzawa
    Abstract:

    To examine the bacterial detection rate in Infusion Fluid collected inside the Fluid catch bag during 25-gauge (25G) vitrectomy when the ocular surface was irrigated with Infusion Fluid or 0.25 % povidone-iodine. Two groups using different Fluids for ocular surface irrigation during 25G vitrectomy were studied. Fifty-five consecutive eyes received ocular surface irrigation with Infusion Fluid (IF group) and 52 consecutive eyes with 0.25 % povidone-iodine (PI group). Samples of ocular surface Fluid were collected at the beginning of surgery and samples of Infusion Fluid inside the Fluid catch bag were collected at the end of surgery for bacteriological cultures. At the beginning of surgery, the bacterial detection rates in ocular surface Fluid samples were 5.8 % (3 of 52 eyes) in the IF group and 7.7 % (4 of 52 eyes) in the PI group, with no significant difference (P = 0.6955). At the end of surgery, the bacterial detection rates in Infusion Fluid collected inside the Fluid catch bag were 23.1 % (12 of 52 eyes) in the IF group and 3.8 % (2 of 52 eyes) in the PI group, with a significant difference (P = 0.0041). No endophthalmitis occurred in either group. These results demonstrate the risk of bacterial contamination when surgical instruments fall accidentally into the Fluid catch bag during conventional 25G vitrectomy. Irrigating the ocular surface with 0.25 % povidone-iodine instead of Infusion Fluid significantly reduces the bacterial contamination rate in the Fluid catch bag.

  • Clear visualization of anterior vitreous incarceration into cannulae during 25-gauge vitrectomy in eyes with asteroid hyalosis.
    European journal of ophthalmology, 2012
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Ryusaburo Mori, Yoshihiro Mizutani, Mitsuko Yuzawa
    Abstract:

    PURPOSE To demonstrate anterior vitreous incarceration in the cannulae at 3 ports during 25-gauge vitrectomy in eyes with asteroid hyalosis. METHODS In 6 eyes with asteroid hyalosis, 3-port 25-gauge pars plana vitrectomy was conducted using conventional 25-gauge cannula (4 eyes) or 25-gauge EdgePlusTM trocar/cannula system (2 eyes). The relationship between the cannulae and anterior vitreous was observed during surgery. RESULTS The 3 ports were observed at the beginning of vitrectomy. At the Infusion port, incarceration of anterior vitreous containing asteroid bodies between the cannula and the Infusion tip was clearly observed in all 6 eyes, irrespective of the cannula used. When the incarcerated vitreous fibers were excised using a vitreous cutter, the Infusion Fluid flowed toward the center of the vitreous. At both the left and right ports, anterior vitreous containing asteroid bodies was incarcerated into the cannulae in all 6 eyes irrespective of the cannula used. The incarcerated vitreous fibers were excised. At the end of surgery, no vitreous prolapse was found at the 3 ports in all eyes. CONCLUSIONS When using the 25-gauge cannula system, incarceration of anterior vitreous fibers into the cannulae of 3 ports from the beginning of surgery was clearly depicted in eyes with asteroid hyalosis. Excising the incarcerated anterior vitreous fibers is useful to ensure good perfusion and prevent vitreous prolapse.

  • reduction of anterior chamber contamination rate after cataract surgery by intraoperative surface irrigation with 0 25 povidone iodine
    American Journal of Ophthalmology, 2011
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Shinzi Arai, Mitsuko Yuzawa
    Abstract:

    Purpose To prove the hypothesis that during cataract surgery, repeated irrigation of the operative field with povidone–iodine of 0.25% reduces the anterior chamber bacterial contamination rate at completion of operation. Design Prospective, interventional case series. Methods In 404 consecutive eyes, the operative field was irrigated with Infusion Fluid in 202 eyes (group A) and with 0.25% povidone–iodine in 202 eyes (group B). Bacteriologic culture was performed using the following samples: ocular surface Fluid after lid speculum placement and anterior chamber Fluid at the completion of surgery. Anterior chamber Fluid samples were collected at the beginning and completion of surgery for iodide ion concentration measurement. Corneal endothelial cell density was measured using a specular microscope before surgery and on day 7 after surgery. Results Bacterial detection rate in ocular surface Fluid was not significantly different between group A (5.5%) and group B (6.0%), but the rate in anterior chamber Fluid was significantly ( P = .0017) reduced in group B (0%) compared with group A (5.0%). Iodide ion concentrations at the start and end of surgery were 7.5 ± 0.7 μg/mL and 3.5 ± 0.7 μg/mL, respectively, in group B and less than 0.1 μg/mL both at the start and end of surgery in group A. Corneal endothelial cell densities were not significantly difference between groups A and B before surgery (2614 ± 233/mm 2 vs 2534 ± 173/mm 2 ; P = .2254) and 7 days after surgery (2463 ± 269/mm 2 vs 2338 ± 204/mm 2 ; P = .4044). Conclusions In cataract surgery, repeated irrigation of the operative field with povidone–iodine at a concentration of 0.25% achieved an extremely low bacterial contamination rate in the anterior chamber at the completion of surgery.

  • effect of operative field irrigation on intraoperative bacterial contamination and postoperative endophthalmitis rates in 25 gauge vitrectomy
    Retina-the Journal of Retinal and Vitreous Diseases, 2010
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Ryusaburo Mori, Yoshihiro Mizutani, Mitsuko Yuzawa
    Abstract:

    PURPOSE: The purpose of this study was to compare bacterial contamination and endophthalmitis rates with different irrigation methods in 25-gauge vitrectomy. METHODS: A total of 4,347 eyes undergoing 25-gauge vitrectomy were studied prospectively. Of these, 2,801 eyes were irrigated with Infusion Fluid (group A) and 1,546 with 1.25% povidone-iodine (group B) after lid speculum placement. Bacteriologic culture was performed for 103 eyes in group A and 155 eyes in group B using the following samples: ocular surface Fluid after placement of the lid speculum (left eye 1), ocular surface Fluid after operative field irrigation (left eye 2), vitreous collected after angled incision made while some irrigation Fluid remains in the conjunctival sac (V1), and vitreous at the completion of vitrectomy (V2). RESULTS: The bacterial contamination rate in left eye 1 did not differ significantly between groups A (5.5%) and B (5.8%). However, the rates in left eye 2, V1, and V2 were lower in group B (0%, 0%, and 0.6%, respectively) than in group A (2.0%, 1.0%, and 2.0%). Incidences of endophthalmitis were 0 of 2,801 eyes and 0 of 1,546 eyes in groups A and B, respectively. CONCLUSION: After lid speculum placement, ocular surface contamination occurred in approximately 6% of eyes. Irrigating the operative field again with 1.25% povidone-iodine and performing sclerotomy with some povidone-iodine remaining in the conjunctival sac prevented bacterial contamination of the vitreous.

Takayuki Hattori - One of the best experts on this subject based on the ideXlab platform.

  • Reducing bacterial contamination inside Fluid catch bag in 25-gauge vitrectomy by use of 0.25 % povidone-iodine ocular surface irrigation
    International Ophthalmology, 2013
    Co-Authors: Hiroyuki Shimada, Yorihisa Kitagawa, Ayumu Manabe, Kuon Otani, Hiroyuki Nakashizuka, Takayuki Hattori, Mitsuko Yuzawa
    Abstract:

    To examine the bacterial detection rate in Infusion Fluid collected inside the Fluid catch bag during 25-gauge (25G) vitrectomy when the ocular surface was irrigated with Infusion Fluid or 0.25 % povidone-iodine. Two groups using different Fluids for ocular surface irrigation during 25G vitrectomy were studied. Fifty-five consecutive eyes received ocular surface irrigation with Infusion Fluid (IF group) and 52 consecutive eyes with 0.25 % povidone-iodine (PI group). Samples of ocular surface Fluid were collected at the beginning of surgery and samples of Infusion Fluid inside the Fluid catch bag were collected at the end of surgery for bacteriological cultures. At the beginning of surgery, the bacterial detection rates in ocular surface Fluid samples were 5.8 % (3 of 52 eyes) in the IF group and 7.7 % (4 of 52 eyes) in the PI group, with no significant difference (P = 0.6955). At the end of surgery, the bacterial detection rates in Infusion Fluid collected inside the Fluid catch bag were 23.1 % (12 of 52 eyes) in the IF group and 3.8 % (2 of 52 eyes) in the PI group, with a significant difference (P = 0.0041). No endophthalmitis occurred in either group. These results demonstrate the risk of bacterial contamination when surgical instruments fall accidentally into the Fluid catch bag during conventional 25G vitrectomy. Irrigating the ocular surface with 0.25 % povidone-iodine instead of Infusion Fluid significantly reduces the bacterial contamination rate in the Fluid catch bag.

  • Clear visualization of anterior vitreous incarceration into cannulae during 25-gauge vitrectomy in eyes with asteroid hyalosis.
    European journal of ophthalmology, 2012
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Ryusaburo Mori, Yoshihiro Mizutani, Mitsuko Yuzawa
    Abstract:

    PURPOSE To demonstrate anterior vitreous incarceration in the cannulae at 3 ports during 25-gauge vitrectomy in eyes with asteroid hyalosis. METHODS In 6 eyes with asteroid hyalosis, 3-port 25-gauge pars plana vitrectomy was conducted using conventional 25-gauge cannula (4 eyes) or 25-gauge EdgePlusTM trocar/cannula system (2 eyes). The relationship between the cannulae and anterior vitreous was observed during surgery. RESULTS The 3 ports were observed at the beginning of vitrectomy. At the Infusion port, incarceration of anterior vitreous containing asteroid bodies between the cannula and the Infusion tip was clearly observed in all 6 eyes, irrespective of the cannula used. When the incarcerated vitreous fibers were excised using a vitreous cutter, the Infusion Fluid flowed toward the center of the vitreous. At both the left and right ports, anterior vitreous containing asteroid bodies was incarcerated into the cannulae in all 6 eyes irrespective of the cannula used. The incarcerated vitreous fibers were excised. At the end of surgery, no vitreous prolapse was found at the 3 ports in all eyes. CONCLUSIONS When using the 25-gauge cannula system, incarceration of anterior vitreous fibers into the cannulae of 3 ports from the beginning of surgery was clearly depicted in eyes with asteroid hyalosis. Excising the incarcerated anterior vitreous fibers is useful to ensure good perfusion and prevent vitreous prolapse.

  • reduction of anterior chamber contamination rate after cataract surgery by intraoperative surface irrigation with 0 25 povidone iodine
    American Journal of Ophthalmology, 2011
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Shinzi Arai, Mitsuko Yuzawa
    Abstract:

    Purpose To prove the hypothesis that during cataract surgery, repeated irrigation of the operative field with povidone–iodine of 0.25% reduces the anterior chamber bacterial contamination rate at completion of operation. Design Prospective, interventional case series. Methods In 404 consecutive eyes, the operative field was irrigated with Infusion Fluid in 202 eyes (group A) and with 0.25% povidone–iodine in 202 eyes (group B). Bacteriologic culture was performed using the following samples: ocular surface Fluid after lid speculum placement and anterior chamber Fluid at the completion of surgery. Anterior chamber Fluid samples were collected at the beginning and completion of surgery for iodide ion concentration measurement. Corneal endothelial cell density was measured using a specular microscope before surgery and on day 7 after surgery. Results Bacterial detection rate in ocular surface Fluid was not significantly different between group A (5.5%) and group B (6.0%), but the rate in anterior chamber Fluid was significantly ( P = .0017) reduced in group B (0%) compared with group A (5.0%). Iodide ion concentrations at the start and end of surgery were 7.5 ± 0.7 μg/mL and 3.5 ± 0.7 μg/mL, respectively, in group B and less than 0.1 μg/mL both at the start and end of surgery in group A. Corneal endothelial cell densities were not significantly difference between groups A and B before surgery (2614 ± 233/mm 2 vs 2534 ± 173/mm 2 ; P = .2254) and 7 days after surgery (2463 ± 269/mm 2 vs 2338 ± 204/mm 2 ; P = .4044). Conclusions In cataract surgery, repeated irrigation of the operative field with povidone–iodine at a concentration of 0.25% achieved an extremely low bacterial contamination rate in the anterior chamber at the completion of surgery.

  • effect of operative field irrigation on intraoperative bacterial contamination and postoperative endophthalmitis rates in 25 gauge vitrectomy
    Retina-the Journal of Retinal and Vitreous Diseases, 2010
    Co-Authors: Hiroyuki Shimada, Hiroyuki Nakashizuka, Takayuki Hattori, Ryusaburo Mori, Yoshihiro Mizutani, Mitsuko Yuzawa
    Abstract:

    PURPOSE: The purpose of this study was to compare bacterial contamination and endophthalmitis rates with different irrigation methods in 25-gauge vitrectomy. METHODS: A total of 4,347 eyes undergoing 25-gauge vitrectomy were studied prospectively. Of these, 2,801 eyes were irrigated with Infusion Fluid (group A) and 1,546 with 1.25% povidone-iodine (group B) after lid speculum placement. Bacteriologic culture was performed for 103 eyes in group A and 155 eyes in group B using the following samples: ocular surface Fluid after placement of the lid speculum (left eye 1), ocular surface Fluid after operative field irrigation (left eye 2), vitreous collected after angled incision made while some irrigation Fluid remains in the conjunctival sac (V1), and vitreous at the completion of vitrectomy (V2). RESULTS: The bacterial contamination rate in left eye 1 did not differ significantly between groups A (5.5%) and B (5.8%). However, the rates in left eye 2, V1, and V2 were lower in group B (0%, 0%, and 0.6%, respectively) than in group A (2.0%, 1.0%, and 2.0%). Incidences of endophthalmitis were 0 of 2,801 eyes and 0 of 1,546 eyes in groups A and B, respectively. CONCLUSION: After lid speculum placement, ocular surface contamination occurred in approximately 6% of eyes. Irrigating the operative field again with 1.25% povidone-iodine and performing sclerotomy with some povidone-iodine remaining in the conjunctival sac prevented bacterial contamination of the vitreous.

Paul D. Mintz - One of the best experts on this subject based on the ideXlab platform.

  • Performance characteristics of Ultratherm Fluid warmer.
    Anesthesia & Analgesia, 1993
    Co-Authors: Jong-hoon Lee, Paul D. Mintz
    Abstract:

    Ultratherm Infusion Fluid Warmer Model 3703-1 (Ultratherm) is a disposable device approved by the Food and Drug Administration to warm Fluids including blood and nutritional Fluids. It has no temperature monitor or audible alarm and uses air-activated chemical heating elements in direct contact with loops of intravenous (i.v.) tubing. We studied the warming of blood and saline by Ultratherm using intratubing thermocouple wire probes. Internal warmer chamber temperature reached 58 degrees C within 40 min of activation, and a plateau of approximately 65 degrees C reached in 1 h was sustained over the next 5 h. Free hemoglobin measurements on 47 degrees C and 53 degrees C blood samples obtained as blood exited the warmer at 30 mL/h demonstrated 0.6% and 7% hemolysis, respectively. Room temperature blood at 500 mL/h and refrigerated blood at 100 mL/h were warmed to approximately 36 degrees C. Refrigerated blood at 500 mL/h was not warmed above 19 degrees C. At flow rates of 500, 100, and 30 mL/h, room temperature saline reached 34 degrees C, 45 degrees C, and 52 degrees C, respectively. The unmonitored, high, internal warmer chamber temperatures preclude the use of Ultratherm with blood or any Fluids potentially damaged by excessive heat, and its use should be limited strictly to clear Fluids. The utility of the warmer, even with clear Fluids, is further limited to room temperature Fluids, to a time interval between 1 and 6 h following activation, and to flow rates between 100 and 500 mL/h.(ABSTRACT TRUNCATED AT 250 WORDS)