J.ophthalmol.(Ukraine).2018;6:30-34.

http://doi.org/10.31288/oftalmolzh201863034

Received: 27 August  2018; Published on-line: 31 December 2018


Intraocular temperature changes during vitrectomy procedure

R.E. Nazaretyan1, O.S. Zadorozhnyy1,  Cand Sc (Med), M.M. Umanets1, Dr Sc (Med), 

V.A. Naumenko1, Dr Sc (Med), Prof., N.V. Pasyechnikova, Assoc. Member of the NAMS of Ukraine, Dr Sc (Med), Prof., V.V. Shafranskii2, Dr Sc (Med), Assoc. Prof.

1 Filatov Institute of Eye Diseases  and Tissue Therapy, NAMS of Ukraine; Odesa (Ukraine)

2 Bohomolets National Medical University; Kyiv (Ukraine)

E-mail:  laserfilatova@gmail.com

shafrav@gmail.com

 

Background: Monitoring of treatment parameters is of utmost importance in current medicine. The use of intraocular media and irrigation fluid temperature monitoring during vitreoretinal surgery is, however, not common in current clinical practice.

Purpose: To investigate intraocular temperature changes at various time points of vitreoretinal surgery.

Materials and Methods: Twenty patients (20 eyes) who underwent vitrectomy with room-temperature (24.2±0.52 ˚С) irrigation solutions at an ambient temperature of 24.4±0.51 °С were under observation. Temperatures in the anterior, mid- and posterior vitreous were recorded before and immediately after vitrectomy and after performance of additional surgical manipulations.

Results: The presence of a transvitreous temperature gradient from the anterior toward the posterior vitreous of the human eye was confirmed. At baseline, the highest temperature (34.17±0.36 °С) was recorded in the posterior vitreous. There were significant decreases in temperatures in vitreous compartments immediately after vitrectomy, with the lowest temperature of 30.1±0.45 °С recorded in the anterior vitreous, and the greatest temperature decrease (3.8±0.59 ˚С) compared to baseline, in the preretinal posterior vitreous. There were increases in temperatures in vitreous compartments after additional surgical manipulations and, with an increase in the duration of these manipulations, temperature in the vitreous increased at an average rate of 0.18°C per minute.

Conclusion: Vitreoretinal surgery is commonly performed under conditions of artificially induced local hypothermia, warranting intraoperative monitoring of intraocular and irrigation fluid temperatures.

Keywords: vitrectomy, intraocular temperature, human eye

 

References

1.Postel EA, Pulido JS, Byrnes GA, et al. Long-term follow-up of iatrogenic phototoxicity. Arch Ophthalmol. 1998 Jun;116(6):753-7.

2.Farah M, Maia M, Rodrigues EB. Dyes in Ocular Surgery: Principles for Use in Chromovitrectomy. Am J Ophthalmol. 2009 Sep;148(3):332-40.

3.Hasumura T, Yonemura N, Hirata A, et al. Retinal Damage by Air Infusion during Vitrectomy in Rabbit Eyes. Invest Ophthalmol Vis Sci. 2000;41:4300–04.

4.Ocular perfusion pressure during pars plana vitrectomy: a pilot study. Rossi T, Querzoli G, Angelini G. Invest Ophthalmol Vis Sci. 2014 Dec 2;55(12):8497-505. doi: 10.1167/iovs.14-14493.

5.Zadorozhnyy OS,  Nazaretian RE, Myrnenko VV, Naumenko VA, Maltsev EV, Pasyechnikova NV. Structure of the chorioretinal complex in the rabbit eye after vitrectomy. Report 1. Vitreous cavity irrigation with different temperature solutions for 30 minutes. J Ophthalmol (Ukraine). 2018;3:73-84. 

6.Rinkoff J, Machemer R, Hida T, Chandler D. Temperature-dependent light damage to the retina. Am J Ophthalmol. 1986;102:452–62.

7.Tamai K, Toumoto E, Majima A. Local hypothermia protects the retina from ischaemic injury in vitrectomy. Br J Ophthalmol. 1997;81:789–94.

8.Romano MR, Romano V, Mauro A, et al. The effect of temperature changes in vitreoretinal surgery. Transl Vis Sci Technol. 2016 Feb 9;5(1):4.

9.Anatychuk LI, Pasyechnikova NV, Zadorozhnyy OS, et al. [A thermoelectric device for measuring intraocular temperature]. Thermoelektrika. 2015;3:31-40. Ukrainian.

10.Anatychuk LI, Pasyechnikova NV, Zadorozhnyy OS, et al. A thermoelectric device for and approaches to temperature measurement in various ocular compartments. J Ophthalmol (Ukraine). 2015;6:50-3.

11.Alzaga AG, Cerdan M, Varon J. Therapeutic hypothermia. Resuscitation. 2006 Sep;70(3):369-80.

12.Polderman KH, Herold I. Therapeutic hypothermia and controlled normothermia in the ICU: Practical considerations, side effects, and cooling methods. Crit Care Med. 2009; 37:1101–20.

13.Saad H, Aladawy M. Temperature management in cardiac surgery. Glob Cardiol Sci Pract. 2013;2013:44–62.

14.Hypothermia after Cardiac Arrest Study Group. Mild therapeutic hypothermia to improve the neurologic outcome after cardiac arrest. N Engl J Med. 2002;346:549–56.

15.Yenari MA, Han HS. Neuroprotective mechanisms of hypothermia in brain ischaemia. Nat Rev Neurosci. 2012 Feb 22;13(4):267-78.

16.Iguchi Y, Asami T, Ueno S, et al. Changes in vitreous temperature during intravitreal surgery. Invest Ophthalmol Vis Sci. 2014 Apr 11;55(4):2344-9.

17.Zadorozhnyy OS, Nazaretian RE, Myrnenko VV, Naumenko VA, Pasyechnikova NV. [Experimental study of the epibulbar and intraocular temperature in the rabbit under hypothermic conditions]. Oftalmologiia. Vostochnaia Evropa. 2018;1:73-81. Russian.