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Aim: In Japan, unlike Western countries, tocolytic agents are administered in long‐term protocols to treat threatened preterm labor. Evaluating the side effects of this practice is crucial. We examined whether ritodrine hydrochloride had been administered in cases of maternal death, aiming to investigate any relationship between ritodrine administration and maternal death. Methods: This retrospective cohort study used reports of maternal deaths from multiple institutions in Japan between 2010 and 2020. Data on the reported cases were retrospectively analyzed, and data on the route of administration, administered dose, and clinical findings, including causes of maternal death, were extracted. The amount of tocolytic agents was compared between maternal deaths with ritodrine administration and those without. Results: A total of 390 maternal deaths were reported to the Maternal Death Exploratory Committee in Japan during the study period. Ritodrine hydrochloride was administered in 32 of these cases. The frequencies (n) and median doses (range) of oral or intravenous ritodrine hydrochloride were 34.4% (11) and 945 (5–2100) mg and 84.4% (27) and 4032 (50–18 680) mg, respectively. Frequencies of perinatal cardiomyopathy, cerebral hemorrhage, diabetic ketoacidosis, and pulmonary edema as causes of maternal death were significantly higher with ritodrine administration than without it. Conclusions: Our results suggest a relationship between long‐term administration of ritodrine hydrochloride and an increased risk of maternal death due to perinatal cardiomyopathy, cerebral hemorrhage, diabetic ketoacidosis, and pulmonary edema. In cases where ritodrine should be administered to prevent preterm labor, careful management and monitoring of maternal symptoms are required. [ABSTRACT FROM AUTHOR]

Aims: The aim of this study is to investigate whether consumption of sturgeon fillets reduces the oxidative stress marker urinary 8‐hydroxy‐2′‐deoxyguanosine (8OHdG) in top‐ranked Japanese female long‐distance runners. Methods: In a before‐and‐after study, nine professional long‐distance female athletes ate 100 g/day of sturgeon fillets for 2 weeks. Urinalysis (8OHdG, an oxidative stress marker, and creatinine), blood tests (fatty acids and 25‐hydroxyvitamin D [25OHD]), exercise intensity, subjective fatigue, muscle elasticity, muscle mass, body fat mass, and nutritional intake using image‐based dietary assessment (IBDA) were compared before, immediately after, and 1 month after the intervention. Results: Consumption of sturgeon fillets suppressed 8OHdG (p < 0.05) in the increased exercise intensity female athletes. Eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and 25OHD levels in blood increased from before to immediately after and 1 month after the intervention (p < 0.05). IBDA showed that intake of n‐3 fatty acid increased after and one month after the intervention, whereas DHA, imidazole dipeptide and vitamin D intake increased after the intervention (p < 0.05) and then decreased after 1 month (p < 0.05). There were no significant changes in subjective fatigue, muscle elasticity, muscle mass, and body fat. Conclusions: The results suggest that eating sturgeon fillets during intense training may increase blood levels of EPA, DHA, and 25OHD, which may suppress urinary oxidative stress (8OHdG) in top‐ranked Japanese long‐distance runners. [ABSTRACT FROM AUTHOR]

Objective: The goal of this study is to find clues to improve perinatal outcomes in the case of cerebrovascular acute disorders during pregnancy.Study Design: We analyzed 35 cases of cerebrovascular diseases related to maternal deaths in Japan those that occurred during pregnancy and reported to the Committee of the Ministry of Health, Labor, and Welfare from 2010 to 2018.Results: Cerebrovascular acute disorders occurred at 34.6 ± 6.6 gestational weeks. There were seven intrauterine fetal deaths (IUFD), and eight cases showed neonatal asphyxia with umbilical arterial pH between 6.7 and 7.0 (asphyxia cases, n = 15). In two of eight newborns, brain hypothermia therapy was given, and all survived without neurological sequelae. Maternal dyspnea was significantly related to severe prolonged decelerations of the fetus (p < .05), and asphyxia cases (p < .005). Median time from maternal onset to delivery (OD time) was significantly longer in asphyxia cases than in the non-asphyxia cases (84 vs 29 min, p < .05). OD time over 30 min was significantly related to the antepartum occurrence, cervical dilatation <5 cm (p < .05), onset outside of the hospital (p < .001), and maternal transfer before delivery (p < .001).Conclusion: More than 40% of cases experienced fetal asphyxia, and 20% ended in IUFD in maternal deaths related to cerebrovascular acute disorders. Maternal respiratory support and rapid delivery would be the keys to improve perinatal outcomes in case of cerebrovascular acute disorders during pregnancy. [ABSTRACT FROM AUTHOR]