Abstract
Objectives
To assess the severity, evolution, and behaviour of several urinary symptoms in patients with obstructive sleep apnea syndrome (OSAS) before and after the treatment with continuous positive airway pressure (CPAP).
Methods
A prospective study was performed on patients with a recent diagnosis of sleep apnea confirmed by nocturnal sleep polygraphy and absence of medical urological past history. The symptom incidence was analysed seeking predictive factors for initial nocturia, nocturnal polyuria (NP), and unfavourable International Prostate Symptoms Score (IPSS) before and after a 1-year period of treatment using a CPAP device. Morphometric variables (body mass index, BMI; neck and abdominal diameter) and functional respiratory variables (FEV1, FVC, and FEV1/FVC) were analysed. A multivariate analysis was performed with a calculation of Pearson’s correlation coefficient to establish a linear relation between the variables.
Results
A total of 43 patients completed the two-step study (IPSS and bladder diary before and after the CPAP treatment). IPSS decreased by 3.58 points. Nocturia decreased to once per night. Neck diameter, FEV1, and FEV1/FVC significantly predicted the initial severity of some lower urinary tract symptoms (LUTS), (p=0.015, p=0.029, p=0.008, respectively). Neck diameter, abdominal perimeter, and FEV1/FVC significantly predicted the LUTS evolution throughout the study (p=0.023, p=0.007, p=0.05, respectively).
Conclusion
Some pre-treatment morphometry and spirometry parameters such as abdominal or neck diameter, FEV1, and FEV1/FVC were predictive of the severity and evolution of LUTS in patients with OSAS.
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Abbreviations
- 24hP:
-
24-h urine production
- 24hVF:
-
24-h voiding frequency
- AVV:
-
Average voided volume
- AHI:
-
Apnea/hipopnea index per hour
- AASM:
-
American Academy of Sleep Medicine
- APAP:
-
Automatic Positive Airway Pressure
- BD:
-
3-day bladder diary
- BMI:
-
Body mass index
- DAVV:
-
Day average voided volume
- DIH:
-
O2 desaturation index per hour
- DMVV:
-
day maximum voided volume
- CPAP:
-
continuous positive airway pressure
- CT90:
-
Cumulative time percentage with SpO2 < 90%
- DMVV:
-
Day maximum voided volume
- DVF:
-
Day voiding frequency
- FVC:
-
Forced vital capacity
- FEV1:
-
Forced expiratory volume in the first second
- LUTS:
-
Low urinary tract symptoms
- MVV:
-
Maximum voided volume
- NAVV:
-
Night average voided volume
- NMVV:
-
Night maximum voided volume.
- ND:
-
Nocturnal diuresis
- NP:
-
Nocturnal polyuria
- NPI:
-
Nocturnal polyuria index
- NVF:
-
Night voiding frequency
- NUV:
-
Nocturnal urine volume
- IPSS:
-
International prostate symptoms score
- LUTS:
-
Lower urinary tract symptoms
- OSAS:
-
Obstructive sleep apnea syndrome
- PSA:
-
Prostatic specific antigen
- PVU:
-
Post-voidal residual urine
- Qmax:
-
Maximal urinary flow
- TUR:
-
Transurethral resection
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An altruistic assistance has been provided from Universidad de Oviedo in terms of statistical analysis (Unidad de Consultoría Estadística Universidad de Oviedo).
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Fernández-Pello, S.S., Rodríguez Villamil, L.L., Gil, R.R. et al. The role of morphometric and respiratory factors in predicting the severity and evolution of urinary symptoms in patients with obstructive sleep apnea syndrome. Sleep Breath 26, 907–914 (2022). https://doi.org/10.1007/s11325-021-02341-z
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DOI: https://doi.org/10.1007/s11325-021-02341-z