Trial reportInternational ophthalmology2026
Effects on anterior chamber stability during the capsulorhexis using utrata forceps vs. a bent 26G cannula.
Trial report in International ophthalmology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeProspective randomized single-blinded study of 261 cataract patients to investigate the influence of different instruments and techniques in continuous curvilinear capsulorhexis (CCC) on the stability of the anterior chamber using intraoperative rebound tonometry.
methodsThe study included 261 eyes allocated to six groups according to three ophthalmic viscoelastic device (OVD) conditions-hyaluronic acid (HA), hydroxypropylmethylcellulose (HPMC), and their combination via the soft-shell technique (SST)-and two instruments (Utrata forceps UF and a 26-G cystotome RN). Intraocular pressure (IOP) was measured before and after CCC using rebound tonometry with sterilized probes.
resultsIOP reached 78.6 mmHg in the RN group and 76.5 mmHg in the UF group after OVD instillation and after the creation of the CCC. The mean IOP drop during capsulorhexis was significantly greater with UF (67.1 ± 12.3 mmHg; n = 117) compared to RN (56.5 ± 11.6 mmHg; n = 144) (P < 0.001).
conclusionThe results of this study showed a statistically significant difference in the stability of the anterior chamber depending on the instrument used. The use of different OVDs had no statistically significant influence on anterior chamber stability. Maintaining a more stable IOP with a 26-gauge cystotome may be advantageous in complex cases, such as increased posterior vitreous pressure, zonular weakness or heightened intracapsular pressure.
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