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Vitreous humor thermodynamics during phacoemulsification

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Abstract

The purpose of this study is to determine baseline vitreous humor temperature during a combined phacoemulsification and pars plana vitrectomy (PPV) procedure; to determine what is the temperature variation during phacoemulsification; and to compare vitreous temperature to sublingual temperature. The methods used are prospective, interventional and comparative study. Patients with a diagnosis of cataract and vitreous hemorrhage, programed for a combined procedure of phacoemulsification and PPV, were included. Patients were excluded if posterior capsular rupture existed during the anterior segment procedure. A thermoprobe was inserted through a PPV trocar. Measurement of the vitreous temperature was obtained at baseline and throughout phacoemulsification, at the end of every surgical step, and every 5 min. Sublingual temperature was measured with the same probe at the end of the surgery. Room temperature was registered. Seventeen eyes of 17 patients were included. Mean sublingual temperature was 36.5 °C (standard deviation [σ] 0.26 °C). Mean total vitreous temperature was 31.47 °C (σ 2.1 °C). Mean baseline vitreous temperature was 33.04 °C (σ 0.99 °C). Comparison of sublingual temperature with baseline vitreous temperature resulted in a significant difference (t test P < 0.000. 95 % confidence interval 2.93–3.98). Temperature measured by surgical step and surgical time presented a significant decrease in temperature from baseline (Kruskal–Wallis P < 0.000, P = 0.003, respectively). Vitreous humor is significantly hypothermic when compared to sublingual temperature. Vitreous temperature decreases significantly during phacoemulsification.

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Authors and Affiliations

  1. Asociación Para Evitar la Ceguera en México, Universidad Nacional Autónoma de México, Vicente García Torres # 46, 04030, Mexico, Mexico

    Guillermo Salcedo-Villanueva, Guadalupe Cervantes-Coste, Daniel Ochoa-Contreras, Virgilio Morales-Cantón & José Luis Guerrero-Naranjo

  2. University of North Carolina School of Medicine, 321 S Columbia St, Chapel Hill, NC, 27516, USA

    Veronica Kon-Jara & Maurice B. Landers III

  3. Department of Ophthalmology, Denver Health Medical Center, University of Colorado School of Medicine, 777 Bannock St., Denver, CO, 80204-4507, USA

    Guillermo Salcedo-Villanueva, Mariana Harasawa & Hugo Quiroz-Mercado

Authors
  1. Guillermo Salcedo-Villanueva
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  2. Veronica Kon-Jara
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  3. Mariana Harasawa
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  4. Guadalupe Cervantes-Coste
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  5. Daniel Ochoa-Contreras
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  6. Virgilio Morales-Cantón
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  7. José Luis Guerrero-Naranjo
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  8. Hugo Quiroz-Mercado
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  9. Maurice B. Landers III
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Correspondence to Guillermo Salcedo-Villanueva.

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Salcedo-Villanueva, G., Kon-Jara, V., Harasawa, M. et al. Vitreous humor thermodynamics during phacoemulsification. Int Ophthalmol 35, 557–564 (2015). https://doi.org/10.1007/s10792-014-9983-z

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  • DOI: https://doi.org/10.1007/s10792-014-9983-z

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