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Continuous positive airway pressure treatment of obstructive sleep apnea and hypertensive complications in high-risk pregnancy

  • Sleep Breathing Physiology and Disorders • Original Article
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Abstract

Purpose

To evaluate whether or not continuous positive airway pressure (CPAP) treatment in pregnancies complicated by obstructive sleep apnea (OSA) is associated with a decrease in hypertensive disorders of pregnancy.

Methods

This was a retrospective cohort study of perinatal outcomes in women who underwent objective OSA testing and treatment as part of routine clinical care during pregnancy. Where diagnostic criteria for OSA were reached (respiratory event index (REI) ≥ 5 events per hour), patients were offered CPAP therapy. Obstetrical outcomes were compared between the control group (no OSA), the group with untreated OSA (OSA diagnosed, not CPAP compliant), and the group with treated OSA (OSA diagnosed and CPAP compliant), with CPAP compliance defined as CPAP use ≥ 4 h, 70% of the time or greater. A composite hypertension outcome combined diagnoses of gestational hypertension (gHTN) and preeclampsia (PreE) of any severity.

Results

The study comprised outcomes from 177 completed pregnancies. Our cohort was characterized by obesity, with average body mass indices > 35 kg/m2, and average maternal age > 30 years old. CPAP was initiated at an average gestational age of 23 weeks (12.1–35.3 weeks), and average CPAP use was 5.9 h (4–8.5 h). The composite hypertension outcome occurred in 43% of those without OSA (N = 77), 64% of those with untreated OSA (N = 77), and 57% of those with treated OSA, compliant with CPAP (N = 23) (p = 0.034).

Conclusion

Real-world data in this small study suggest that CPAP therapy may modulate the increased risk of hypertensive complications in pregnancies complicated by OSA.

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Data availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We would like to thank the University of Wisconsin School of Medicine and Public Health Departments of Obstetrics and Gynecology and Neurology, Unity Point Health-Meriter’s Center for Perinatal Care, and Wisconsin Sleep for their support in the development of the obstetric sleep clinic. We thank the Department of Biology Course Biology 152 for fostering collaboration between undergraduate students and clinical research mentors. We thank Rebecca Weise, RT, RPSGT, and Kenneth Kloes, RRT, RPSGT, for the reliable and expeditious triaging of pregnancy referrals for sleep evaluations, and Julie Maxwell, RRT, RPSGT, and James Neville, CRT, RPSGT, for processing and scoring of home sleep apnea tests and optimization of the treatment initiation and clinic follow up workflow for pregnant patients.

Funding

Via the use of REDCap for clinical tracking, the project described was supported by the Clinical and Translational Science Award (CTSA) program, through the NIH National Center for Advancing Translational Sciences (NCATS), grant UL1TR002373.

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All the authors have read and approved the manuscript.

Corresponding author

Correspondence to Mihaela H. Bazalakova.

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Ethics approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee. Institutional review board (IRB) approval for this study was obtained from UnityPoint Health-Meriter (IRB 2019–014).

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The authors declare no competing interests.

Institution where work was performed

The University of Wisconsin-Madison.

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Rice, A.L., Bajaj, S., Wiedmer, A.M. et al. Continuous positive airway pressure treatment of obstructive sleep apnea and hypertensive complications in high-risk pregnancy. Sleep Breath 27, 621–629 (2023). https://doi.org/10.1007/s11325-022-02669-0

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  • DOI: https://doi.org/10.1007/s11325-022-02669-0

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