title: Pulmonary Function in Patients with End-Stage Renal Disease: Effects of Hemodialysis and Fluid Overload.
abstract: BACKGROUND Respiratory system disorders are one of the most prevalent complications in end-stage renal disease patients on hemodialysis. However, the pathogenesis of impaired pulmonary functions has not been completely elucidated in these patients. We designed a study to investigate acute effects of hemodialysis treatment on spirometry parameters, focusing on the relationship between pulmonary function and fluid status in hemodialysis patients. MATERIAL AND METHODS We enrolled 54 hemodialysis patients in this study. Multifrequency bioimpedance analysis (BIA) was used to assess fluid status before and 30 min after the midweek of hemodialysis (HD). Overhydration (OH)/extracellular water (ECW)% ratio was used as an indicator of fluid status. Fluid overload was deﬁned as OH/ECW ≥7%. Spirometry was performed before and after hemodialysis. RESULTS Forced vital capacity (FVC), FVC%, and forced expiratory volume in the first second (FEV1) levels were significantly increased after hemodialysis. FVC, FVC%, FEV1, FEV1%, mean forced expiratory flow between 25% and 75% of the FVC (FEF25-75), FEF25-75%, peak expiratory flow rate (PEFR), and PEFR% were significantly lower in patients with fluid overload than in those without. OH/ECW ratio was negatively correlated with FVC, FVC%, FEV1, FEV1%, FEF25-75, FEF25-75%, PEFR, and PEFR%. Stepwise multiple regression analysis revealed that male sex and increased ultrafiltration volume were independently associated with higher FVC, whereas increased age and OH/ECW ratio were independently associated with lower FVC. CONCLUSIONS Fluid overload is closely associated with restrictive and obstructive respiratory abnormalities in HD patients. In addition, hemodialysis has a beneficial effect on pulmonary function tests, which may be due to reduction of volume overload.
authors: Department of Chest Diseases and Tuberculosis, Dicle University, Faculty of Medicine, Diyarbakir, Turkey.
authors: Süreyya
authors: S
authors: Yılmaz
authors: Department of Nephrology, Dicle University, Faculty of Medicine, Diyarbakir, Turkey.
authors: Yasar
authors: Y
authors: Yildirim
authors: Department of Nephrology, Dicle University, Faculty of Medicine, Diyarbakir, Turkey.
authors: Zülfükar
authors: Z
authors: Yilmaz
authors: Department of Nephrology, Dicle University, Faculty of Medicine, Diyarbakir, Turkey.
authors: Ali Veysel
authors: AV
authors: Kara
authors: Department of Chest Diseases and Tuberculosis, Dicle University, Faculty of Medicine, Diyarbakir, Turkey.
authors: Mahsuk
authors: M
authors: Taylan
authors: Department of Chest Diseases and Tuberculosis, Dicle University, Faculty of Medicine, Diyarbakir, Turkey.
authors: Melike
authors: M
authors: Demir
authors: Department of Chest Diseases and Tuberculosis, Dicle University, Faculty of Medicine, Diyarbakir, Turkey.
authors: Mehmet
authors: M
authors: Coskunsel
authors: Department of Nephrology, Dicle University, Faculty of Medicine, Diyarbakir, Turkey.
authors: Ali Kemal
authors: AK
authors: Kadiroglu
authors: Department of Nephrology, Dicle University, Faculty of Medicine, Diyarbakir, Turkey.
authors: Mehmet Emin
authors: ME
authors: Yilmaz
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D007676:Kidney Failure, Chronic / Q000503:physiopathology* / Q000628:therapy*; D008168:Lung / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D010366:Peak Expiratory Flow Rate; D006435:Renal Dialysis; D051436:Renal Insufficiency, Chronic / Q000503:physiopathology / Q000628:therapy; D012129:Respiratory Function Tests; D014797:Vital Capacity / Q000502:physiology