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Objective  Bakri intrauterine balloon (BIUB) placement is an effective treatment for postpartum hemorrhage (PPH). This study aims to evaluate the risk of infection during BIUB placement. Study Design  Data for all deliveries ( n  = 2,144) at our institution between January 2014 and March 2018 were retrospectively reviewed. Patients diagnosed with PPH ( n  = 758) were included in our analysis, further divided into BIUB ( n  = 80) and non-BIUB groups ( n  = 678), and subdivided into vaginal delivery (VD), elective cesarean delivery (CD), and emergency CD groups. Postpartum endometritis rate was compared in each group. A single dose of prophylactic antibiotics was administered for BIUB placement in the VD group. In the CD groups, antibiotics were administered preoperatively once, and no additional antibiotics for BIUB placement were administered. To obtain an antibiotics administration protocol to be applied during BIUB placement, we electronically searched the PubMed and Scopus databases. Results  No significant differences were observed in endometritis rates between BIUB and non-BIUB groups of all groups. In the literature review, of 27 suitable publications identified, multiple doses of antibiotics were administered in 17 (62.9%) studies and none investigated the efficacy of a protocol for antibiotic. Conclusion  Our protocol might be effective and sufficient in preventing postpartum BIUB placement-related endometritis.Objective  This study was aimed to estimate the percentage of women taking opioids post-cesarean who could be detected in a state prescription monitoring program (PMP) and characteristics of those not able to be detected. Study Design  This observational cohort study included all women with an Illinois address who delivered via cesarean section and used opioids within 24 hours prior to discharge at a tertiary care hospital between August 21, 2017 and March 1, 2018. The Illinois PMP was queried for presence of an opioid prescription filled within the first 3 months postpartum. Sociodemographic and clinical factors associated with an undetectable PMP record were evaluated in bivariable and multivariable logistic regression analyses. Results  A total of 517 women underwent a cesarean delivery during the study period, of whom 344 (66.5%) met inclusion criteria. Of these women, 169 (49%) did not have a detectable PMP record of filling any outpatient postpartum prescription opioid. On bivariable and multivariable logistic regression analysis, year of delivery (2018 vs. 2017) was significantly associated with a higher incidence of detectable postpartum prescription opioid record in the PMP with increasing relative risk of detectable records in the second year of analyses ( n  = 110/244 [45%] in 2017 vs. n  = 59/100 [59%] in 2018, adjusted risk ratio [aRR] = 1.32, 95% confidence interval [CI] 1.06-1.64, p  = 0.013). No other sociodemographic or clinical characteristics was significantly associated. Conclusion  Nearly half of women who underwent a cesarean section and who were administered opioids 24 hours prior to discharge did not have a detectable postpartum opioid prescription in the PMP. While identification of prescription filling improved with time, many of women were not detectable in the PMP system. SB239063 These data call into question the accuracy of PMPs in identifying prescription opioid filling patterns in the postpartum setting.This feature issue commemorating 25 years of STED microscopy and 20 years of SIM is intended to highlight the incredible progress and growth in the field of superresolution microscopy since Stefan Hell and Jan Wichmann published the article Breaking the diffraction resolution limit by stimulated emission stimulated-emission-depletion fluorescence microscopy in Optics Letters in 1994. © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.We present a systematic characterization of the optical properties (µa and µs') of nine representative ex vivo porcine tissues over a broadband spectrum (650-1100 nm). We applied time-resolved diffuse optical spectroscopy measurements for recovering the optical properties of porcine tissues depicting a realistic representation of the tissue heterogeneity and morphology likely to be found in different ex vivo tissues. The results demonstrate a large spectral and inter-tissue variation of optical properties. The data can be exploited for planning or simulating ex vivo experiments with various biophotonics techniques, or even to construct artificial structures mimicking specific pathologies exploiting the wide assortment in optical properties. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.We have recently introduced a novel methodology for the noninvasive analysis of the structure and composition of human skin in vivo. The approach combines pulsed photothermal radiometry (PPTR), involving time-resolved measurements of mid-infrared emission after irradiation with a millisecond light pulse, and diffuse reflectance spectroscopy (DRS) in the visible part of the spectrum. Simultaneous fitting of both data sets with respective predictions from a numerical model of light transport in human skin enables the assessment of the contents of skin chromophores (melanin, oxy-, and deoxy-hemoglobin), as well as scattering properties and thicknesses of the epidermis and dermis. However, the involved iterative optimization of 14 skin model parameters using a numerical forward model (i.e., inverse Monte Carlo - IMC) is computationally very expensive. In order to overcome this drawback, we have constructed a very fast predictive model (PM) based on machine learning. The PM involves random forests, trained on ∼9,000 examples computed using our forward MC model. We show that the performance of such a PM is very satisfying, both in objective testing using cross-validation and in direct comparisons with the IMC procedure. We also present a hybrid approach (HA), which combines the speed of the PM with versatility of the IMC procedure. Compared with the latter, the HA improves both the accuracy and robustness of the inverse analysis, while significantly reducing the computation times. © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.