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• W2033157029 abstract "Background: Bronchopulmonary dysplasia(BPD)remains an important cause of mortality and morbidity in preterm infants. A disordered vascular development and a decreased production of angiogenic factors in BPD have been recently reported. Extracellular matrix (ECM) is known to play an important role on angiogenesis and blood vessel geometry and changes in ECM components have been previously reported in experimental models and patients with BPD. In the present study, we tested the hypothesis of abnormal reflectance of the oral mucosa in BPD. Methods: Fifteen preterm infants with BPD(M:9,F:6; gestational age:27.5±2.0 wk, birth weight:850±125 gr) and 15 gender and gestational age-matched control infants without BPD (M:9, F:6; gestational age: 27.6±2.6 wk, birth weight: 865±135 gr) were examined. Mean blood concentrations of major chromophores, including hemoglobin and bilirubin (P= 0.95) and total bilirubin (P= 0.88) were comparable between the groups. Reflectance was measured on high-resolution photographs of the lower lower gingival and vestibular oral mucosa, using an imaging spectrophotometer. Spatially averaged spectra were used in order to estimate the oral mucosal color in the 400–700 nm wavelength electromagnetic spectral range. Derived spectral data were reproducible [intra- and inter-observer coefficients of variation (mean±SD),1.46±0.89% and 3.72±1.75%, respectively], and qualitatively comparable (±2%shift) to those obtained by direct measurements (absolute spectral error∼0.4). Reflectance values from 50–100 different artifact-free and vessel-free areas were measured, and mean values were used for data analysis. The predictive accuracy of oral spectrophotometry was calculated using receiver operating characteristic curve analysis. Results: BPD patients showed significantly lower light reflectance values in the red (610–700 nm; t values range:4.552–6.775, df=28,P<0.0001), with higher values in the violet (400nm, P=.0056;430nm, P=.014), and blue-green (480–500 nm, P≤.024) sections of the spectrum. A low reflectance value in the 640–700 nm wavelengths interval was found to identify BPD patients with 100% sensitivity and 100% specificity (640nm: cutoff≤44.91%;650nm:≤ 45.64%;660nm:≤46.56%; 670nm:≤47.14%;680nm:≤47.56%;690nm:≤ 48.95%;700nm:≤50.81%). Conclusion: These findings indicate the presence of previously unrecognised, early abnormalities of the average optical properties of the oral mucosa in BPD infants." @default.
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• W2033157029 date "2004-09-01" @default.
• W2033157029 modified "2023-09-27" @default.
• W2033157029 title "63 Abnormal Oral Mucosal Light Reflectance in Bronchopulmonary Dysplasia" @default.
• W2033157029 doi "https://doi.org/10.1203/00006450-200409000-00086" @default.
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