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2025 ; 18
(ä): 763-768
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In situ Serial Trident Chop for Low-IOP Phacoemulsification without Nuclear
Rotation: A Case Report
#MMPMID40585965
Lin HC
; Lin YH
Int Med Case Rep J
2025[]; 18
(ä): 763-768
PMID40585965
show ga
BACKGROUND: Phacoemulsification had been made efficient by hydrodissection,
nucleus rotation, chopping, and using high vacuum to aspirate lens fragments
under high hydrostatic pressure. Yet hydrodissection might be incomplete with the
lens nucleus resisting rotation. Further vigorous hydrodissection might rupture
the posterior capsule and forceful nuclear rotation might cause zonular dialysis.
Encountered with such conditions, we present a case using an in situ serial
trident chop technique and hydrodelineation independent of complete
hydrodissection and nucleus rotation to avoid related complications. CASE
PRESENTATION: A 61-year-old male patient with grade II nuclear opalescence
received phacoemulsification from the author. Incomplete hydrodissection,
inadvertent hydrodelineation and difficult nuclear rotation were noted during
operation. The author turned to in situ serial trident chop without nuclear
rotation under low intraocular pressure (IOP), which was done by dividing the
nucleus into four fragments through three serial in situ horizontal chops in the
12 o'clock, 3 o'clock, and 10 o'clock directions, then the fragments were picked
to the phaco tip by nucleus manipulator instead of high vacuum produced by phaco
tip to reduce the hydrostatic pressure needed for keeping the safe depth of the
anterior chamber. The resultant four small nuclear fragments were readily
emulsified under a stable anterior chamber with an IOP of 20-28 mmHg and
cumulative dissipated energy of 3.28. The eye's central corneal thickness
increased from 522 ?m before the operation to 540 ?m on the following day.
CONCLUSION: Phacoemulsification could be accomplished by in situ serial trident
chop under low IOP and hydrodelineation without complete hydrodissection or
nuclear rotation for grade II nuclear opalescence, although further investigation
is needed to confirm its safety and efficacy.