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Original Research

Open Access

Comparison of Three Methods of Predictive Postoperative FEV1 and DLCO Calculations in Relation to Their Observed Postoperative Values in Lung Resection

  • Vjekoslav Karadža1
  • Ivanka Karadža2

1Jordanovac Department of Thoracic Surgery, Zagreb University Hospital Center, Zagreb, Croatia

2Department of Obstetrics and Gynecology, Varaždin General Hospital, Varaždin, Croatia

DOI: 10.22514/sv.2020.16.0004 Vol.16,Issue 1,June 2020 pp.25-32

Published: 30 June 2020

*Corresponding Author(s): Vjekoslav Karadža E-mail:


Introduction: Three ways of simple calculations (segmental based on 18 segments method, segmental based on 19 segments method and subsegmental method) of predictive postoperative values of FEV1 and DLCO are in use during the preoperative survey for patients planned for lung resection as treatment of lung carcinoma as a part of risk assessment. Hypothesis: Segmental calculation method based on 19 segments is better than subsegmental method and segmental calculation method based on 18 segments in prediction of postoperative values of both FEV1 and DLCO one month after lung lobectomy. Materials and methods: Expected postoperative calculated values of FEV1 and DLCO (two segmental and one subsegmental method) of 52 patients undergone lobectomy are related to real postoperative values for same patients one month after surgery. Results: According to univariate analysis, real values of postoperative DLCO correlate most significantly with ppoDLCO calculated by segmental method (18 segments), but real values of postoperative FEV1 correlate most significantly with ppoFEV1 calculated by 19 overall segments segmental method. Data analysis as well showed that preoperative calculated PpoFEV1 and PpoDLCO underestimate real postoperative values of FEV1 and DLCO one month after lobectomy, but it is not statistically significant. Discussion: Same as contemporary guidelines suggest, ppoFEV1 calculation by 19 segments segmental method seems to be the best choice. PpoDLCO is maybe better to calculate by 18 segments segmental method.


Thoracic surgery, FEV1, DLCO

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Vjekoslav Karadža,Ivanka Karadža. Comparison of Three Methods of Predictive Postoperative FEV1 and DLCO Calculations in Relation to Their Observed Postoperative Values in Lung Resection. Signa Vitae. 2020. 16(1);25-32.


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