Airway closure and pregnancy

Holdcroft, Anita; Bevan, David R.; O'Sullivan, Jane; Sykes, M.K.

doi:10.1111/j.1365-2044.1977.tb09998.x

Cited by 24 publications

(13 citation statements)

References 13 publications

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“…4 Increased airway closure may occur during tidal ventilation resulting in increased ventilation/perfusion mismatch. 5 This effect is exacerbated in the supine position. However, there is some compensation for these changes as a result of a right shift of the oxyhaemoglobin desaturation curve in normal pregnancy, such that delivery of oxygen to the placenta and maternal tissue is enhanced.…”

Section: Physiological Changes In Respiratory Function During Pregnancymentioning

confidence: 98%

Sleep disordered breathing and pregnancy

Edwards

Middleton²,

Blyton³

et al. 2002

Thorax

111

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Section: Physiological Changes In Respiratory Function During Pregnancymentioning

confidence: 98%

Sleep disordered breathing and pregnancy

Edwards

Middleton²,

Blyton³

et al. 2002

Thorax

111

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“…Lung function studies have shown that both closing capacity and FRC are lower in pregnancy compared with the post-partum period [10,11]. However, there have been no studies measuring the effect of pregnancy or the post-partum period on UA dimension.…”

mentioning

confidence: 99%

“…BRADLEY et al [5] reported that snorers with or without obstructive sleep apnoea have narrower upper airways (UAs) than nonsnorers even when awake. In pregnancy, the physiological changes potentially predisposing to increased resistance [2] and reduced cross-sectional area of the UAs [4] include the following: weight gain [2,[6][7][8][9]; a decreased functional residual capacity (FRC) due to mass displacement of the diaphragm [9][10][11]; pharyngeal oedema of pregnancy [2][3][4]12]; and, possibly, the effect of sleep deprivation or fragmentation on pharyngeal dilator muscle activity [13] and UA collapsibility [14].…”

mentioning

confidence: 99%

Sleep-disordered breathing and upper airway size in pregnancy and post-partum

Izci

Vennelle

Liston

et al. 2006

European Respiratory Journal

186

118

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Sleep-disordered breathing and snoring are common in pregnancy. The aim of this study was to determine whether pregnancy was associated with upper airway narrowing.One-hundred females in the third trimester of pregnancy were recruited and 50 agreed to be restudied 3 months after delivery. One-hundred nonpregnant females were also recruited. Upper airway dimensions were measured using acoustic reflection.Snoring was less common in nonpregnant (17%) than pregnant females (41%; odds ratio (OR) 3.34; 95% confidence interval (CI) 1.65-6.74) and returned to nonpregnant levels after delivery (18%; OR 0.15; 95% CI 0.06-0.40). Pregnant females had significantly smaller upper airways than nonpregnant females at the oropharyngeal junction when seated (mean difference 0.12; 95% CI 0.008-0.25), and smaller mean pharyngeal areas in the seated (mean difference 0.14; 95% CI 0.001-0.28), supine (mean difference 0.11; 95% CI 0.01-0.22) and lateral postures (mean difference 0.13; 95% CI 0.02-0.24) compared with the nonpregnant females. Pregnant females had smaller mean pharyngeal areas compared with post-partum in the seated (mean difference 0.18; 95% CI 0.02-0.32), supine (mean difference 0.20; 95% CI 0.06-0.35) and lateral postures (mean difference 0.26; 95% CI 0.12-0.39).In conclusion, this study confirmed increased snoring and showed narrower upper airways during the third trimester of pregnancy.

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“…Pregnancy is a risk factor for developing RLS, although the exact mechanisms behind this remain unclear. According to a review article from 2006 (4) the prevalence is 19-26 % among pregnant women compared to 11 % in Swedish women aged [25][26][27][28][29][30][31][32][33][34] years in the general population (5). RLS is most common during the last trimester, but its development during pregnancy has not been fully analyzed.…”

Section: Introductionmentioning

confidence: 99%

Restless legs syndrome during and after pregnancy and its relation to snoring

Sarberg¹,

Josefsson²,

Wiréhn³

et al. 2012

Acta Obstet Gynecol Scand

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Restless legs syndrome during and after pregnancy and its relation to snoring, 2012, Acta Obstetricia et Gynecologica Scandinavica, (91), 7, 850-855. which has been published in final form at: http://dx.doi.org/10.1111/j. 1600-0412.2012 Design. Prospective study.Setting. Antenatal care clinics in the catchment area of Linköping university hospital, Sweden.Population. Five hundred consecutively recruited pregnant women. Methods. Sleep disturbances, including symptoms of restless legs syndromeand snoring was assessed with questionnaires in each trimester. A complementary questionnaire was sent three years after delivery to women experiencing RLS-symptoms during pregnancy. Main outcome measures. RLS-symptoms in relation to snoring in each trimester.Results. RLS-symptoms were reported by 17.0 % of the women in the 1 st , by 27.1 % in the 2 nd and by 29.6 % in the 3 rd trimester. Snoring in the 1 st trimester was correlated to increased prevalence of RLS in all three trimesters (p=0.003, 0.017 and 0.044). No correlation was found between RLS and anemia, parity or body mass index. Among the RLS women 31% still had symptoms three years after delivery. Fifty-eight percent of those whose symptoms had disappeared stated that this happened within one month after delivery. Conclusions

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Airway closure and pregnancy

Cited by 24 publications

References 13 publications

Sleep disordered breathing and pregnancy

Sleep disordered breathing and pregnancy

Sleep-disordered breathing and upper airway size in pregnancy and post-partum

Restless legs syndrome during and after pregnancy and its relation to snoring

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