896 Letters to the Editor / European Journal of Cardio-Thoracic Surgery studies carried out in various geographic regions. In a different study including a larger number of patients (1051 cases) also done in Japan, it was observed that only a decrease in atmospheric pressure can cause SP, not an increase in Taijiro Mishina*, Atsushi Watanabe and Masahiro Miyajima its value . Department of General Thoracic Surgery, Sapporo Medical University School Studies carried out in Europe have reported contradictory results, too, prob- of Medicine, Chuo-ku, Sapporo, Japan ably due to the differences in climate compared with that in Japan. In a study conducted in Turkey, we can observe that variations of atmospheric pressure, Received 31 October 2017; accepted 5 November 2017 temperature and humidity of the environment can inﬂuence the occurrence We thank Suciu et al. [1, 2] for their comments on our recently published art- of SP, regardless of the synodic lunar cycle . A different study carried out on icle. As they have pointed out, there are different climates across various parts 175 patients in Turkey also concluded that there is no correlation between of the earth. We also believe that the results will be inﬂuenced by these differ- variations of atmospheric pressure and occurrence of SP . ences. It may be seasonal or periodic, and as we have shown this here, it may Another study done in France, which included 638 patients with SP, con- be caused by the hourly change in atmospheric pressure (AP). Past studies on cluded that there is no correlation between variations of atmospheric pres- pneumothorax and weather conditions in various areas are mostly reports sure, temperature, relative humidity and wind speed and occurrence of that use mean AP. Our report is the ﬁrst detailed report that uses hourly AP primary SP . On the other hand, another study also carried out in France . So far, the research conducted in Japan uses mean AP . Since 2008, in underlies the fact that variations in atmospheric pressure can inﬂuence the oc- Japan, AP is recorded on an hourly basis in each observatory, enabling us to currence of SP . use this data in the study here. If the meteorological agency of your country The majority of the published studies present us with contradictory results has also records AP in terms of time, results that support our ﬁndings may be regarding the correlation between the occurrence of SP and changes in me- obtained. With regard to humidity and temperature, if you conduct a similar teorological parameters. The differences in results might be due to the differ- research using the hourly AP data, these causal relationships may also be ent climates across various regions of the earth as well as the different analysis found. If the relationship between the onset of pneumothorax and the wea- methods employed by these studies. ther condition becomes clear, future research on pneumothorax therapy involving a pathogenic mechanism can be conducted. We also have cumula- tive cases, and we want to increase the reliability of this research. REFERENCES  Mishina T, Watanabe A, Miyajima M, Nakazawa J. Relationship between REFERENCES onset of spontaneous pneumothorax and weather conditions. Eur J Cardiothorac Surg 2017;52:529–33.  Suciu BA, Halmaciu I, Vunvulea V, Brinzaniuc K. Is there any correlation be-  Haga T, Kurihara M, Kataoka K, Ebana H. Inﬂuence of weather conditions tween the occurrence of spontaneous pneumothorax and changes in the on the onset of primary spontaneous pneumothorax: positive association weather conditions worldwide? Eur J Cardiothorac Surg 2018;53:895–6. with decreased atmospheric pressure. Ann Thorac Cardiovasc Surg  Mishina T, Watanabe A, Miyajima M, Nakazawa J. Relationship between 2013;19:212–5. onset of spontaneous pneumothorax and weather conditions. Eur J  Araz O, Ucar EY, Yalcin A, Aydin Y, Sonkaya E, Eroglu A et al. Do atmos- Cardiothorac Surg 2017;52:529–33. pheric changes and the synodic lunar cycle affect the development of  Scott GC, Berger R, McKean HE. The role of atmospheric pressure ventila- spontaneous pneumothorax? Acta Chir Belg 2015;114:284–7. tion in the development of spontaneous pneumothorax. Am Rev Respir  Celik B, Kefeli Celik H, Hamzacebi H, Demir H, Furtun K, Ortamevzi C. The Dis 1989;139:659–62. role of meteorological conditions on the development of spontaneous  Haga T, Kurihara M, Kataoka K, Ebana H. Inﬂuence of weather conditions pneumothorax. Thorac Cardiovasc Surg 2009;57:409–12. on the onset of primary spontaneous pneumothorax: positive association  Heyndricks M, Le Rochais JP, Icard P, Cantat O, Zalcman G. Do atmos- with decreased atmospheric pressure. Ann Thorac Cardiovasc Surg pheric conditions inﬂuence the ﬁrst episode of primary spontaneous 2013;19:212–5. pneumothorax? Interact CardioVasc Thorac Surg 2015;21:296–300.  Alifano M, Forti Parri SN, Bonfanti B, Arab WA, Passini A, Boaron M et al. Atmospheric pressure inﬂuences the risk of pneumothorax: beware of the *Corresponding author. Department of General Thoracic Surgery, Sapporo storm! Chest 2007;131:1877–82. Medical University School of Medicine, Sapporo, South 1, West 16, Chuo-ku, Sapporo 060-8543, Japan. Tel. +81-11-6112111 (ext. 3312); fax: +81-11-6137318; e-mail: email@example.com (T. Mishina). *Corresponding author. Department of Anatomy, University of Medicine and Pharmacy Tˆ ırgu Mures , 38 Gheorghe Marinescu, 540142 Tı ˆrgu doi:10.1093/ejcts/ezx425 Mures , Romania. Tel: +40-740091324; e-mail: firstname.lastname@example.org Advance Access publication 15 December 2017 (I.H almaciu). doi:10.1093/ejcts/ezx424 Advance Access publication 15 December 2017 Downloaded from https://academic.oup.com/ejcts/article-abstract/53/4/896/4748790 by Ed 'DeepDyve' Gillespie user on 16 March 2018
European Journal of Cardio-Thoracic Surgery – Oxford University Press
Published: Apr 1, 2018
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