Universidad Peruana Cayetano Heredia

Isovolemic hemodilution in chronic mountain sickness acutely worsens nocturnal oxygenation and sleep apnea severity

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dc.contributor.author Sanchez-Azofra, Ana
dc.contributor.author Villafuerte, Francisco C.
dc.contributor.author DeYoung, Pamela N.
dc.contributor.author Gilbertson, Dillon
dc.contributor.author Gu, Wanjun
dc.contributor.author Moya, Esteban A.
dc.contributor.author Vizcardo-Galindo, Gustavo
dc.contributor.author Figueroa-Mujica, Romulo
dc.contributor.author Anza-Ramirez, Cecilia
dc.contributor.author Macarlupu, Jose L.
dc.contributor.author Pham, Luu V.
dc.contributor.author Wagner, Peter
dc.contributor.author Malhotra, Atul
dc.contributor.author Simonson, Tatum S.
dc.contributor.author Mesarwi, Omar A.
dc.date.accessioned 2022-11-15T23:04:36Z
dc.date.available 2022-11-15T23:04:36Z
dc.date.issued 2022
dc.identifier.uri https://hdl.handle.net/20.500.12866/12528
dc.description.abstract STUDY OBJECTIVES: Chronic mountain sickness (CMS) is commonly observed among Andean and other highland populations. Sleep-disordered breathing (SDB) is highly prevalent at high altitude, and SDB and nocturnal hypoxemia have been observed in CMS. Phlebotomy is commonly performed to treat CMS, but it is unknown whether reducing hematocrit improves SDB. We hypothesized that isovolemic hemodilution (IVHD) in CMS would reduce SBD severity and improve sleep efficiency. METHODS: Six participants with CMS and 8 without CMS, all residents of Cerro de Pasco, Peru (altitude 4340 m), completed baseline nocturnal sleep studies. CMS participants then underwent IVHD, and nocturnal sleep studies were repeated 24-48 hours after IVHD. We analyzed sleep apnea severity, nocturnal oxygenation, and sleep quality in those with CMS relative to those without CMS, and the effects of IVHD in CMS participants. RESULTS: Participants with CMS did not have altered sleep architecture, sleep apnea severity, or nocturnal oxygenation relative to non-CMS participants. However, IVHD in CMS increased apnea-hypopnea index (40.9 ± 6.9 events/h to 61.5 ± 7.7 events/h, P = .009). IVHD increased oxyhemoglobin desaturation index (P = .008) and the percentage of sleep time spent with oxyhemoglobin saturation at or below 80% (P = .012). There was no effect of IVHD on sleep efficiency, arousal index, or sleep staging. CONCLUSIONS: In this cohort, CMS was not associated with worsened SDB or changes in sleep architecture. IVHD, a putative therapeutic option for participants with CMS, appears to worsen nocturnal oxygenation and SDB within 48 hours post-IVHD. CITATION: Sanchez-Azofra A, Villafuerte FC, DeYoung PN, et al. Isovolemic hemodilution in chronic mountain sickness acutely worsens nocturnal oxygenation and sleep apnea severity. en_US
dc.language.iso eng
dc.publisher American Academy of Sleep Medicine
dc.relation.ispartofseries Journal of Clinical Sleep Medicine
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Andean highlanders en_US
dc.subject chronic mountain sickness en_US
dc.subject high altitude en_US
dc.subject hypoxia en_US
dc.subject nocturnal oxygenation en_US
dc.subject phlebotomy en_US
dc.title Isovolemic hemodilution in chronic mountain sickness acutely worsens nocturnal oxygenation and sleep apnea severity en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.5664/jcsm.10136
dc.relation.issn 1550-9397


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