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Paul B. Henrich - One of the best experts on this subject based on the ideXlab platform.

  • High-frequency Electric Welding: a novel method for improved immediate chorioretinal adhesion in vitreoretinal surgery
    Graefe's Archive for Clinical and Experimental Ophthalmology, 2014
    Co-Authors: Nicolay Umanets, Natalya V. Pasyechnikova, Vladimir A. Naumenko, Paul B. Henrich
    Abstract:

    Purpose To evaluate high-frequency Electric Welding (HFEW) as a novel technique for retinopexy with improved immediate chorioretinal adhesion Methods In a prospective, randomized, experimental study, we examined 104 eyes of 52 rabbits randomly assigned to either standard 810 nm endolaser retinopexy, alternating current 14–16 V or 18–20 V HFEW retinopexy. A full-thickness fragment of eye wall tissue containing the retinopexy was isolated 1 h, 3 days, 1 week, or 1 month respectively after the intervention, and fixed to an analytical electronic scale. A nylon suture passed through the retina was elevated by a biomechanical force elongation tester. The reduction in weight at the time of retinopexy rupture was registered as a measure for retinopexy adhesion strength. Results One hour post-exposure, adhesive strengths were significantly higher in both HFEW groups than in controls (212 ± 26.6 mg and 122 ± 16 mg vs 104 ± 10 mg; p  = 0.0001 and p  = 0.024 respectively) while laser retinopexy did not significantly change adhesive strength (114 ± 14.0 mg, p  = 0.149). Subsequent adhesive strengths were significantly increased for all retinopexy techniques: 3 days post-op 14–16 V HFEW 224 ± 30.0 mg ( p  = 0.001), 18–20 V HFEW 128 ± 15.6 ( p  = 0.001), laser 131 ± 12.7 mg ( p  = 0.0007); at 1 week 14–16 HFEW 235 ± 24.7 mg, 18–20 V HFEW 213 ± 22.4 mg, laser 188 ± 18.7 mg (all p  ≤ 0.001); 1 month post-op 14–16 V HFEW 275 ± 32.0 mg, 18–20 V HFEW 283 ± 31.0 mg, laser 276 ± 21.7 mg, rspectively (all p ≤  0.0001). Conclusion HFEW represents a novel technique for retinopexy during vitreoretinal surgery. It allows firm chorioretinal adhesion immediately after exposure. In non-vitrectomized eyes, using 14–16 V is particularly effective.

  • High-frequency Electric Welding: a novel method for improved immediate chorioretinal adhesion in vitreoretinal surgery
    Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2014
    Co-Authors: Nicolay Umanets, Natalya V. Pasyechnikova, Vladimir A. Naumenko, Paul B. Henrich
    Abstract:

    Purpose To evaluate high-frequency Electric Welding (HFEW) as a novel technique for retinopexy with improved immediate chorioretinal adhesion

Y Lazar - One of the best experts on this subject based on the ideXlab platform.

  • Experimental application of high-frequency Electric Welding of biological tissues for iridoplasty and trabeculectomy
    Acta Ophthalmologica, 2012
    Co-Authors: O. Zadorozhnyy, Nataliya Pasyechnikova, V. Naumenko, Y Lazar
    Abstract:

    Purpose To estimate the possibility of using of high-frequency Electric Welding of biological tissues for iridoplasty and trabeculectomy in the experiment. Methods In experiment we used devices and instruments made by the original method in the E.O.Paton Electric Welding Institute. Experimental studies in vitro were performed on the isolated porcine eye. After dissection of the iris edges of the cut combined with a bipolar instrument. In the second phase studied the possibility of using the method of high-frequency Electric Welding (frequency - 66 kHz - 440 kHz) for trabeculectomy with monopolar electrode, which was injected into the anterior chamber through the corneal incision. The second electrode was fixed to the sclera with special clip. For experiment in vivo we used 10 chinchilla rabbits. Morphological studies of the samples were performed. Results We have observed the formation of solid welded connection of cut edges of the iris. In vitro trabecular tissue of the anterior chamber angle was removed using different settings. In vivo during iridoplasty observed minimal changes in the surrounding tissues in the area of Electrical effects. It was also noted the formation of solid welded connection of iris edges. In vivo were removed structures of the anterior chamber angle of the rabbit without bleeding complications. Conclusion These results indicate the possibility of using the method of high-frequency Electric Welding of biological tissues for microsurgery of the eye trabecular apparatus and iris. Requires further study of the characteristics of the developed method for working out the optimal parameters of exposure.

Nicolay Umanets - One of the best experts on this subject based on the ideXlab platform.

  • High-frequency Electric Welding: a novel method for improved immediate chorioretinal adhesion in vitreoretinal surgery
    Graefe's Archive for Clinical and Experimental Ophthalmology, 2014
    Co-Authors: Nicolay Umanets, Natalya V. Pasyechnikova, Vladimir A. Naumenko, Paul B. Henrich
    Abstract:

    Purpose To evaluate high-frequency Electric Welding (HFEW) as a novel technique for retinopexy with improved immediate chorioretinal adhesion Methods In a prospective, randomized, experimental study, we examined 104 eyes of 52 rabbits randomly assigned to either standard 810 nm endolaser retinopexy, alternating current 14–16 V or 18–20 V HFEW retinopexy. A full-thickness fragment of eye wall tissue containing the retinopexy was isolated 1 h, 3 days, 1 week, or 1 month respectively after the intervention, and fixed to an analytical electronic scale. A nylon suture passed through the retina was elevated by a biomechanical force elongation tester. The reduction in weight at the time of retinopexy rupture was registered as a measure for retinopexy adhesion strength. Results One hour post-exposure, adhesive strengths were significantly higher in both HFEW groups than in controls (212 ± 26.6 mg and 122 ± 16 mg vs 104 ± 10 mg; p  = 0.0001 and p  = 0.024 respectively) while laser retinopexy did not significantly change adhesive strength (114 ± 14.0 mg, p  = 0.149). Subsequent adhesive strengths were significantly increased for all retinopexy techniques: 3 days post-op 14–16 V HFEW 224 ± 30.0 mg ( p  = 0.001), 18–20 V HFEW 128 ± 15.6 ( p  = 0.001), laser 131 ± 12.7 mg ( p  = 0.0007); at 1 week 14–16 HFEW 235 ± 24.7 mg, 18–20 V HFEW 213 ± 22.4 mg, laser 188 ± 18.7 mg (all p  ≤ 0.001); 1 month post-op 14–16 V HFEW 275 ± 32.0 mg, 18–20 V HFEW 283 ± 31.0 mg, laser 276 ± 21.7 mg, rspectively (all p ≤  0.0001). Conclusion HFEW represents a novel technique for retinopexy during vitreoretinal surgery. It allows firm chorioretinal adhesion immediately after exposure. In non-vitrectomized eyes, using 14–16 V is particularly effective.

  • High-frequency Electric Welding: a novel method for improved immediate chorioretinal adhesion in vitreoretinal surgery
    Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2014
    Co-Authors: Nicolay Umanets, Natalya V. Pasyechnikova, Vladimir A. Naumenko, Paul B. Henrich
    Abstract:

    Purpose To evaluate high-frequency Electric Welding (HFEW) as a novel technique for retinopexy with improved immediate chorioretinal adhesion

O. Zadorozhnyy - One of the best experts on this subject based on the ideXlab platform.

  • Experimental application of high-frequency Electric Welding of biological tissues for iridoplasty and trabeculectomy
    Acta Ophthalmologica, 2012
    Co-Authors: O. Zadorozhnyy, Nataliya Pasyechnikova, V. Naumenko, Y Lazar
    Abstract:

    Purpose To estimate the possibility of using of high-frequency Electric Welding of biological tissues for iridoplasty and trabeculectomy in the experiment. Methods In experiment we used devices and instruments made by the original method in the E.O.Paton Electric Welding Institute. Experimental studies in vitro were performed on the isolated porcine eye. After dissection of the iris edges of the cut combined with a bipolar instrument. In the second phase studied the possibility of using the method of high-frequency Electric Welding (frequency - 66 kHz - 440 kHz) for trabeculectomy with monopolar electrode, which was injected into the anterior chamber through the corneal incision. The second electrode was fixed to the sclera with special clip. For experiment in vivo we used 10 chinchilla rabbits. Morphological studies of the samples were performed. Results We have observed the formation of solid welded connection of cut edges of the iris. In vitro trabecular tissue of the anterior chamber angle was removed using different settings. In vivo during iridoplasty observed minimal changes in the surrounding tissues in the area of Electrical effects. It was also noted the formation of solid welded connection of iris edges. In vivo were removed structures of the anterior chamber angle of the rabbit without bleeding complications. Conclusion These results indicate the possibility of using the method of high-frequency Electric Welding of biological tissues for microsurgery of the eye trabecular apparatus and iris. Requires further study of the characteristics of the developed method for working out the optimal parameters of exposure.

Natalya V. Pasyechnikova - One of the best experts on this subject based on the ideXlab platform.

  • High-frequency Electric Welding: a novel method for improved immediate chorioretinal adhesion in vitreoretinal surgery
    Graefe's Archive for Clinical and Experimental Ophthalmology, 2014
    Co-Authors: Nicolay Umanets, Natalya V. Pasyechnikova, Vladimir A. Naumenko, Paul B. Henrich
    Abstract:

    Purpose To evaluate high-frequency Electric Welding (HFEW) as a novel technique for retinopexy with improved immediate chorioretinal adhesion Methods In a prospective, randomized, experimental study, we examined 104 eyes of 52 rabbits randomly assigned to either standard 810 nm endolaser retinopexy, alternating current 14–16 V or 18–20 V HFEW retinopexy. A full-thickness fragment of eye wall tissue containing the retinopexy was isolated 1 h, 3 days, 1 week, or 1 month respectively after the intervention, and fixed to an analytical electronic scale. A nylon suture passed through the retina was elevated by a biomechanical force elongation tester. The reduction in weight at the time of retinopexy rupture was registered as a measure for retinopexy adhesion strength. Results One hour post-exposure, adhesive strengths were significantly higher in both HFEW groups than in controls (212 ± 26.6 mg and 122 ± 16 mg vs 104 ± 10 mg; p  = 0.0001 and p  = 0.024 respectively) while laser retinopexy did not significantly change adhesive strength (114 ± 14.0 mg, p  = 0.149). Subsequent adhesive strengths were significantly increased for all retinopexy techniques: 3 days post-op 14–16 V HFEW 224 ± 30.0 mg ( p  = 0.001), 18–20 V HFEW 128 ± 15.6 ( p  = 0.001), laser 131 ± 12.7 mg ( p  = 0.0007); at 1 week 14–16 HFEW 235 ± 24.7 mg, 18–20 V HFEW 213 ± 22.4 mg, laser 188 ± 18.7 mg (all p  ≤ 0.001); 1 month post-op 14–16 V HFEW 275 ± 32.0 mg, 18–20 V HFEW 283 ± 31.0 mg, laser 276 ± 21.7 mg, rspectively (all p ≤  0.0001). Conclusion HFEW represents a novel technique for retinopexy during vitreoretinal surgery. It allows firm chorioretinal adhesion immediately after exposure. In non-vitrectomized eyes, using 14–16 V is particularly effective.

  • High-frequency Electric Welding: a novel method for improved immediate chorioretinal adhesion in vitreoretinal surgery
    Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2014
    Co-Authors: Nicolay Umanets, Natalya V. Pasyechnikova, Vladimir A. Naumenko, Paul B. Henrich
    Abstract:

    Purpose To evaluate high-frequency Electric Welding (HFEW) as a novel technique for retinopexy with improved immediate chorioretinal adhesion