Bidirectional Interactions Between Obstructive Sleep Apnea and Chronic Kidney Disease- A Review

Area of Science:

• Nephrology
• Pulmonology
• Sleep Medicine

Background:

• Chronic kidney disease (CKD) affects 13-15% of India's population, posing significant morbidity and mortality risks.
• Obstructive sleep apnea (OSA) is increasingly recognized as a contributing factor to CKD development and progression.
• Over 50% of end-stage renal disease (ESRD) patients present with OSA symptoms, indicating a strong bidirectional relationship.

Purpose of the Study:

• To review the complex pathophysiology linking OSA and CKD.
• To explore current and potential management strategies for patients with co-existing OSA and CKD/ESRD.
• To emphasize the importance of diagnosing and treating OSA in renal disease patients.

Main Methods:

• Literature review of studies investigating the interplay between OSA and CKD.
• Analysis of pathophysiological mechanisms, including nocturnal hypoxia, inflammation, and volume overload.
• Evaluation of treatment modalities for OSA in the context of renal disease.

Main Results:

• Nocturnal hypoxia in OSA leads to glomerular hypertension and renal injury, exacerbating CKD.
• CKD worsens OSA through mechanisms like fluid overload and respiratory muscle dysfunction.
• CPAP therapy may improve renal parameters, while nocturnal hemodialysis significantly reduces OSA severity and improves oxygenation.

Conclusions:

• Addressing OSA is critical for managing CKD and ESRD patients.
• Integrated management strategies are needed to break the cycle of mutual exacerbation between OSA and renal disease.
• Further long-term studies are required to fully elucidate the benefits of OSA treatments in CKD.