hydrodelineation

hydrodelineation

/hy·dro·de·lin·e·a·tion/ (-de-lin″e-a´shun) injection of fluid between the layers of the nucleus of the lens using a blunt needle; done to delineate the nuclear zones during cataract surgery.
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The quick-chop phacoemulsification technique was used with balanced salt solution hydrodissection and hydrodelineation.
9, 10, 11) In our study we took comparatively younger age group (35-65 years) having cataracts with nucleus hardness of lower grades (Nuclear Sclerosis grade I, II or early III) keeping in view the fact that in M-MSICS group to deliver the nucleus from relatively small incision size the hydrodelineation was performed prior to nucleus delivery with viscoexpression technique.
It is worth to mention here that hydrodelineation was performed prior to the nucleus delivery with viscoexpression technique in M-MSICS technique.
In hydrodelineation, the fluid injection separates the epinucleus from the endonucleus, so the volume of nucleus is reduced and it can be delivered out by a relatively smaller incision size.
Some surgeons follow this step with the injection of BSS into the nucleus to separate the nucleus into the central hard endonucleus and outer softer epinucleus, in a process called hydrodelineation.
Among the topics are phaco methods and device settings, hydrodissection and hydrodelineation, chip and flip, cortex removal, and decision taking in cataract operations.
The nucleus is then separated from the cortex by a similar method called hydrodelineation.