Gaurav Nigam1, Charu Pathak2, Muhammad Riaz3. 1. Clay County Hospital, 911 Stacy Burk Drive, Flora, IL, 62839, USA. dr.nigamgaurav@gmail.com. 2. NSCB Medical College, Nagpur Road, Jabalpur, 482003, India. 3. Twin Cities Community Hospital, 1100 Las Tablas Rd, Templeton, CA, 93465, USA.
Abstract
BACKGROUND: Obstructive sleep apnea has been widely studied in patients with chronic renal insufficiency; however only a limited number of studies have reviewed the association between central sleep apnea (CSA) and chronic kidney disease (CKD). The objectives of this systematic review were to assess the prevalence of CSA in and its association with CKD in adult patients and to determine if inclusion of the central hypopnea index affected the reported rates for the prevalence of CSA in CKD. METHODS: Medline, Web of Science, Google Scholar, Scopus, and Cochrane Library were searched through October 2015 without any language limitations. RESULTS: Of 188 articles searched, 8 articles met our study inclusion criteria. Of a cumulative total of 313 patients with CKD undergoing sleep study, a total of 30 patients were diagnosed with central sleep apnea. Three studies had patients with coexistent congestive heart failure, six studies included some patients on dialysis and at least 3 studies included central hypopneas while calculating central sleep apnea index. CONCLUSION: The aggregate point prevalence of CSA in CKD is 9.6 %, although the estimated range is highly variable between 0 and 75 %. Limited evidence suggested that even after adjustment for cardiovascular comorbidities, CKD is independently associated with CSA. It is unknown if patients on dialysis are at increased risk compared to patients without end-stage renal disease. Standardization of polysomnographic criteria used to define CSA and sleep disordered breathing (SDB) as well as inclusion of central hypopneas in the overall CSA index will limit the heterogeneity and allow better estimation of the prevalence of CSA in patients with CKD.
BACKGROUND: Obstructive sleep apnea has been widely studied in patients with chronic renal insufficiency; however only a limited number of studies have reviewed the association between central sleep apnea (CSA) and chronic kidney disease (CKD). The objectives of this systematic review were to assess the prevalence of CSA in and its association with CKD in adult patients and to determine if inclusion of the central hypopnea index affected the reported rates for the prevalence of CSA in CKD. METHODS: Medline, Web of Science, Google Scholar, Scopus, and Cochrane Library were searched through October 2015 without any language limitations. RESULTS: Of 188 articles searched, 8 articles met our study inclusion criteria. Of a cumulative total of 313 patients with CKD undergoing sleep study, a total of 30 patients were diagnosed with central sleep apnea. Three studies had patients with coexistent congestive heart failure, six studies included some patients on dialysis and at least 3 studies included central hypopneas while calculating central sleep apnea index. CONCLUSION: The aggregate point prevalence of CSA in CKD is 9.6 %, although the estimated range is highly variable between 0 and 75 %. Limited evidence suggested that even after adjustment for cardiovascular comorbidities, CKD is independently associated with CSA. It is unknown if patients on dialysis are at increased risk compared to patients without end-stage renal disease. Standardization of polysomnographic criteria used to define CSA and sleep disordered breathing (SDB) as well as inclusion of central hypopneas in the overall CSA index will limit the heterogeneity and allow better estimation of the prevalence of CSA in patients with CKD.
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