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  • Title: Impact of hemoglobin levels on hemoglobin-adjusted carbon monoxide diffusion capacity after chemotherapy for testicular cancer.
    Author: Nitta S, Kawai K, Nagumo Y, Ikeda A, Kandori S, Kojima T, Nishiyama H.
    Journal: Jpn J Clin Oncol; 2019 Dec 27; 49(12):1151-1156. PubMed ID: 31361805.
    Abstract:
    OBJECTIVES: We aimed to compare the diffusion capacity of carbon monoxide (DLCO), which was adjusted using the two equations the Cotes method and the Dinakara method, to assess bleomycin-induced lung injury in testicular cancer patients preparing for post-chemotherapy surgery. METHODS: Between November 1990 and October 2018, 89 patients with advanced testicular cancer were recruited into the study. All patients received chemotherapy and underwent DLCO measurements using the single-breath technique prior to surgery for residual tumor removal. RESULTS: The mean DLCO adjusted for hemoglobin using the Cotes and Dinakara methods was 69.5% and 86.0%, respectively (P < 0.001). According to the Cotes method, adjusted DLCO was severely diminished to below 65% in 40 patients (45%), whereas this proportion was only 16% according to the Dinakara method. We observed a significant correlation between hemoglobin levels and DLCO adjusted using the Cotes method (P < 0.001), but not using the Dinakara method. Four patients received a clinical diagnosis of bleomycin-induced pneumonitis (BIP), and all patients recovered after oral steroid therapy or observation. The DLCO adjusted by either methods was not well correlated with the development of BIP. No patients had major postoperative respiratory complications. CONCLUSIONS: We found that Cotes-adjusted DLCO may be influenced by anemia. We recommend the addition of Dinakara-adjusted DLCO, along with chest computed tomography, for preoperative risk assessment.
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