Influence of irrigation dynamic pressure-assisted hydrodissection on intraocular pressure and the posterior chamber-anterior hyaloid membrane barrier during cataract surgery

  • Noriko KatoEmail author
  • Yoichiro Masuda
  • Kotaro Oki
  • Hisaharu Iwaki
  • Hiroshi Tsuneoka
Laboratory Investigation



To evaluate the effects of irrigation dynamic pressure-assisted hydrodissection (irrigation-hydro: iH) on intraocular pressure (IOP) and the posterior chamber-anterior hyaloid membrane (PC-AHM) barrier in porcine eyes.

Study design



In Experiment 1, IOP was recorded while irrigating the anterior chamber (AC), during iH, and during phacoemulsification and aspiration in 20 porcine eyes using bottle heights of 50, 70, and 90 cm. Under the same conditions, IOP was recorded during conventional manual cortical cleaving hydrodissection (manual hydro: mH) in 20 porcine eyes. In Experiment 2, after iH, ACs were perfused for 5 seconds with balanced salt solution containing 1.0-μm fluorescein beads in 20 porcine eyes using bottle heights of 70, 118, and 169 cm. PC-AHM barrier staining grade was evaluated by the Miyake-Apple view.


iH proved successful in all cases. In Experiment 1, IOP during iH was relatively stable and peak IOP was below the baseline bottle height-dependent pressure. No eyes showed a peak IOP > 75 mmHg during iH, but 8 eyes showed a peak IOP > 75 mmHg during mH. In Experiment 2, neither AHT nor ruptured capsules were observed at any bottle height.


Unlike mH, IOP during iH was relatively stable without any high peak IOP. Thus, iH offers a simple technique for reducing peak IOP and avoiding disturbance of the PC-AHM barrier.


Low-invasive cataract surgery Hydrodissection-related complication Capsular block syndrome Anterior hyaloid membrane tear Infusion misdirection syndrome 



We thank Toshinori Okamoto and Tadashi Nakano for their helpful suggestions regarding this study.

Conflicts of interest

N. Kato, None; Y. Masuda, None; K. Oki, None; H. Iwaki, None; H. Tsuneoka, Grant (Abbott Medical Optics, Alcon, Daiichi Sankyo, Kowa, MSD, Nidek, Otsuka, Santen, Senju), Lecture fees (Abbott Medical Optics, Alcon, Bausch + Lomb, HOYA, Kowa, Nidek, Otsuka, Pfizer, Santen, Senju).

Supplementary material

Supplementary material 1 (MP4 35859 kb)


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Copyright information

© Japanese Ophthalmological Society 2018

Authors and Affiliations

  • Noriko Kato
    • 1
    Email author
  • Yoichiro Masuda
    • 1
  • Kotaro Oki
    • 2
  • Hisaharu Iwaki
    • 3
  • Hiroshi Tsuneoka
    • 1
  1. 1.Department of Ophthalmology, School of MedicineThe Jikei UniversityTokyoJapan
  2. 2.Oki Eye Surgery CenterTokyoJapan
  3. 3.Iwaki Eye ClinicTokyoJapan

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