Details of a Researcher - Kasuga, Yoshifumi

Papers - Kasuga, Yoshifumi

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Pregnancy outcomes following radical trachelectomy for early-stage cervical cancer: A retrospective observational study in the Kanto area, Japan.

Kasuga Y, Hasegawa K, Hamuro A, Fukuma Y, Tamai J, Tanaka Y, Ikenoue S, Tanaka M

International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics (International Journal of Gynecology and Obstetrics) 164 ( 1 ) 108 - 114 2023.06

ISSN 0020-7292

Objective: The authors aimed to investigate the prevalence of pregnancy and obstetric outcomes in patients who underwent radical trachelectomy (RT) for early-stage cervical cancer in the Kanto area, Japan. Method: A survey among 113 perinatal centers affiliated with the Kanto Society of Obstetrics and Gynecology was conducted to investigate their experience in managing pregnancies following RT, between 2010 and 2020. The association between preterm delivery (before 34 gestational weeks) and a midtrimester short cervix (<13 mm) was evaluated. Results: The authors retrospectively collected maternal and perinatal data from 13 hospitals. There were 135 pregnancies among 115 women following RT. Of the 135 pregnancies, 32 were miscarriages (<12 gestational weeks: n = 22; >12 gestational weeks: n = 10), and 103 were delivered after 22 gestational weeks. The incidences of preterm delivery before 28 and 34 gestational weeks were 8.7% and 30.1%, respectively. A midtrimester short residual cervix was associated with preterm delivery (P = 0.046). Conclusion: Since more than 100 pregnancies were recorded after RT in the Kanto area, many physicians had more opportunities to manage pregnancy after RT. Pregnancy following RT is associated with increased risk of preterm delivery, and midtrimester short residual cervix is a good predictor of preterm delivery.

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Genome-wide association study of preterm birth and gestational age in a Japanese population.

Hasegawa K, Kumasaka N, Nakabayashi K, Kamura H, Maehara K, Kasuga Y, Hata K, Tanaka M

Human genome variation (Human Genome Variation) 10 ( 1 ) 19 2023.06

ISSN 2054-345X

Preterm birth (PTB), defined as the birth of a baby at <37 weeks of gestation, is known to be the main cause of neonatal morbidity and mortality. Here, we report genetic associations between preterm birth and gestational age in a Japanese population. We conducted a genome-wide association study (GWAS) of 384 cases who delivered prematurely and 644 controls and considered gestational age as a quantitative trait in 1028 Japanese women. Unfortunately, we were unable to identify any significant variants associated with PTB or gestational age using the current sample. We also examined genetic associations previously reported in European populations and identified no associations, even with the genome-wide subthreshold (p value < 10–6). This data report aims to provide summary statistics of current GWASs on PTB in a Japanese population for future meta-analyses of genetics and PTB with larger sample sizes.

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Obstetric outcomes after medroxyprogesterone acetate treatment for early stage endometrial cancer or atypical endometrial hyperplasia: a single hospital-based study

Oishi M., Kasuga Y., Fukuma Y., Hamuro A., Tamai J., Tanaka Y., Hasegawa K., Yoshimura T., Ikenoue S., Ochiai D., Yamagami W., Tanaka M.

International Journal of Clinical Oncology (International Journal of Clinical Oncology) 28 ( 4 ) 587 - 591 2023.04

ISSN 13419625

Background: To investigate perinatal outcomes in pregnancy after high-dose medroxyprogesterone acetate (MPA) therapy for early stage endometrial cancer (EC) and atypical endometrial hyperplasia (AEH) and to determine whether pregnancy after MPA therapy is at a higher risk of placenta accreta. Methods: Data of 51 pregnancies in 46 women who received MPA therapy for EC or AEH and delivered after 22 weeks of gestation at Keio University Hospital were reviewed. A retrospective matched case–control study was performed to determine the risk of placenta accreta in pregnancy after MPA therapy compared with singleton pregnancies without any history of maternal malignancy treatments. Results: The incidence of placenta accreta was higher in the MPA group than in the control group (15.7 vs. 0%, p = 0.0058). However, no differences in other perinatal outcomes were observed between groups. While gestational weeks at delivery in the MPA group were later than those in the control group (p = 0.0058), no difference in the incidence of preterm delivery was recorded between groups. In the MPA therapy group, the number of patients who underwent ≥ 6 dilation and curettage (D&C) was higher in the placenta accreta group than in the non-placenta accreta group (50.0 vs. 14.0%, p = 0.018). Patients with ≥ 6 D&Cs demonstrated a 6.0-fold increased risk of placenta accreta (p = 0.043, 95% CI 1.05–34.1) than those receiving ≤ 3 D&Cs. Conclusion: Pregnancy after MPA therapy is associated with a high risk of placenta accreta. In cases in which the frequency of D&C is high, placenta accreta should be considered.

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染色体異常を伴わない胎児臍帯ヘルニアの2例

木村由実子, 玉井順子, 春日義史, 秋田啓介, 田中邦生, 葉室明香, 福間優花, 長谷川慶太, 大谷利光, 池ノ上学, 青木大輔, 田中守

東京産科婦人科学会会誌 ((一社)東京産科婦人科学会) 72 ( 2 ) 327 - 331 2023.04

ISSN 2186-0599

緒言:今回我々は染色体異常を伴わない胎児臍帯ヘルニアの2例の周産期管理を行ったので報告する.症例1は41歳,1妊0産.体外受精-胚移植により妊娠成立し,妊娠13週に臍帯ヘルニアを指摘された.症例2は40歳,1妊0産.自然妊娠にて妊娠成立し,妊娠12週に胎児腹部腫瘤を指摘された.いずれも妊娠16週の羊水検査で正常核型であり,超音波断層法では肝脱出型臍帯ヘルニアと単一臍帯動脈以外の形態異常は指摘されなかった.出生後の精査にて症例1は食道閉鎖,鎖肛,軟口蓋裂,左多合指症等を認めたためVATER連合,症例2は耳介の形態や高インスリン血症からBeckwith-Wiedemann症候群が疑われた.結論:染色体異常を伴っていない臍帯ヘルニアでは,他の症候群の1症候であり出生後に判明する場合があることを念頭に胎児の慎重な観察と家族への十分な説明を行うことが望ましいと考えられた.(著者抄録)

コロナ禍における周産期合併症の変化

春日義史, 田中雄也, 田中守

DOHaD研究 ((一社)日本DOHaD学会) 11 ( 2 ) 152 - 157 2023.03

ISSN 2187-2562

Ultrasonographic Prediction of Placental Invasion in Placenta Previa by Placenta Accreta Index

Hasegawa K., Ikenoue S., Tanaka Y., Oishi M., Endo T., Sato Y., Ishii R., Kasuga Y., Ochiai D., Tanaka M.

Journal of Clinical Medicine (Journal of Clinical Medicine) 12 ( 3 ) 2023.02

ISSN 2077-0383

This study aimed to investigate the diagnostic accuracy of the placenta accreta index (PAI) for predicting placenta accreta spectrum (PAS) in women with placenta previa. We analyzed 33 pregnancies with placenta previa at Keio University Hospital. The PAI was assessed in the early third trimester, and PAS was diagnosed histologically or clinically defined as retained placenta after manual removal attempts. The PAI and incidence of PAS were analyzed. Ten women (30%) were diagnosed with PAS and had higher volumes of perioperative bleeding (p = 0.016), higher rate of requiring uterine artery embolization (p = 0.005), and peripartum hysterectomy (p = 0.0002) than women without PAS. A PAI > 2 was the most useful cut-off point for predicting PAS and was more sensitive than prediction values using traditional evaluation (history of cesarean section and placental location). Post-hoc analysis revealed a higher rate of previous history of cesarean delivery (30% vs. 4.4%, p = 0.038), severe placental lacunae (≥grade2) (70% vs. 8.7%, p = 0.0003), thin myometrial thickness (90% vs. 22%, p = 0.0003), anterior placenta (100% vs. 30%, p = 0.0002), and presence of bridging vessels (30% vs. 0%, p = 0.0059) in PAS women. PAI could help predict the outcomes of women with placenta previa with and without a history of cesarean delivery to reduce PAS-induced perinatal complications.

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Risk factors of neonatal hypoglycemia in neonates born to mothers with gestational diabetes

Arimitsu T., Kasuga Y., Ikenoue S., Saisho Y., Hida M., Yoshino J., Itoh H., Tanaka M., Ochiai D.

Endocrine Journal (Endocrine Journal) 70 ( 5 ) 511 - 517 2023

ISSN 09188959

Hypoglycemia is one of the most significant problems in neonates born to mothers with gestational diabetes (GDM). This study aimed to identify novel predictors of hypoglycemia in neonates born to mothers with GDM. A total of 443 term singleton infants from mothers diagnosed with GDM and cared for at Keio University Hospital between January 2013 and December 2019 were included in this study. Neonatal hypoglycemia was defined as hypoglycemia of less than 47 mg/dL at 1 or 2 or 4 h after birth, according to previous studies. Among 443 full-term singleton neonates born to mothers with GDM, 200 developed hypoglycemia (45%). Gestational weight gain (GWG), HbA1c at 1st trimester, HbA1c at GDM diagnosis, and the incidence of insulin therapy in the neonatal hypoglycemia group were significantly higher than those in the non-neonatal hypoglycemia group (p = 0.016, p = 0.032, p = 0.011, and p = 0.017, respectively). Regarding the multiple regression analysis adjusted for nulliparity, GWG, and gestational weeks at delivery, the odds ratio for maternal HbA1c ≥5.2% at 1st trimester was 1.63 (p = 0.034), and maternal insulin therapy during pregnancy was 1.72 (p = 0.015). In conclusion, HbA1c in the 1st trimester and insulin therapy during pregnancy were good predictors of hypoglycemia in neonates born to GDM mothers, especially when their HbA1c was 5.2% or more. Further research will be necessary to improve the perinatal management of hypoglycemia.

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Fetal growth restriction and a single umbilical artery are independent predictors of hypospadias during pregnancy

Endo T., Iida M., Ichihashi Y., Oishi M., Ikenoue S., Kasuga Y., Sato T., Hida M., Ishii T., Asanuma H., Hasegawa T., Tanaka M., Ochiai D.

Placenta (Placenta) 130 53 - 59 2022.12

ISSN 01434004

Introduction: Little is known about the association between hypospadias and small fetuses, as well as the pathological implications of fetal growth restriction (FGR). Thus, we aimed to investigate the association between hypospadias and small fetuses using a database of fetal ultrasound and obstetric events. Methods: A cohort of male singleton infants delivered after 22 weeks of gestation at Keio University Hospital between 2013 and 2019 was retrospectively reviewed. FGR was defined according to the Delphi criteria. Logistic regression analysis was performed to identify the significant predictors of hypospadias. Placental pathology was reviewed in cases with hypospadias. Results: Of the 2,040 male infants included in the present study, 23 had hypospadias. The prevalences of a single umbilical artery (SUA), small for gestational age, maternal hypertensive disorders of pregnancy, and a small placenta, were significantly higher in infants with hypospadias. Multiple logistic regression analysis revealed that FGR (odds ratio [OR] = 9.39; 95% confidence interval [CI], 2.50–35.3) and the presence of a SUA (OR = 33.4; 95% CI, 8.00–139.5) were independently and significantly associated with hypospadias. When FGR was stratified by the time of onset, its association with hypospadias was significant regardless of the time of onset. Moreover, placental histological findings suggested that fetal vascular malperfusion might play a role in hypospadias. Discussion: FGR and SUAs are independent prenatal predictors of the development of hypospadias, and fetal vascular malperfusion of the placenta may be involved in the etiology of hypospadias.

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Human Amniotic Fluid Stem Cells Ameliorate Thioglycollate-Induced Peritonitis by Increasing Tregs in Mice

Abe Y., Ochiai D., Taguchi M., Kanzaki S., Ikenoue S., Kasuga Y., Tanaka M.

International Journal of Molecular Sciences (International Journal of Molecular Sciences) 23 ( 12 ) 2022.06

ISSN 16616596

Mesenchymal stem cells (MSCs) affect immune cells and exert anti-inflammatory effects. Human amniotic fluid stem cells (hAFSCs), a type of MSCs, have a high therapeutic effect in animal models of inflammation-related diseases. hAFSCs can be easily isolated and cultured from amniotic fluid, which is considered a medical waste. Hence, amniotic fluid can be a source of cells for MSC therapy of inflammatory diseases. However, the effect of hAFSCs on acquired immunity in vivo, especially on regulatory T cells, has not yet been fully elucidated. Therefore, in this study, we aimed to understand the effects of hAFSCs on acquired immunity, particularly on regulatory T cells. We showed that hAFSCs ameliorated the thioglycollate-induced inflammation by forming aggregates with host immune cells, such as macrophages, T cells, and B cells in the peritoneal cavity. Further, the regulatory T cells increased in the peritoneal cavity. These results indicated that, in addition to helping the innate immunity, hAFSCs could also aid the acquired immune system in vivo against inflammation-related diseases by increasing regulatory T cells.

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The associated factors of low birthweight among term singletons in Japan: a pregnancy birth registry analysis.

Kasuga Y, Iida M, Tanaka Y, Tamagawa M, Hasegawa K, Ikenoue S, Sato Y, Tanaka M, Ochiai D

Journal of epidemiology 33 ( 9 ) 450 - 455 2022.04

ISSN 0917-5040

Background: Progress in reducing the global low birthweight (LBW) has been insufficient. Although the focus has been on preventing preterm birth, evidence regarding LBW in term births is limited. Despite its low preterm birth prevalence, Japan has a higher LBW proportion than other developed countries. This study aimed to examine the prevalence of LBW in term singleton births and its associated factors using a national database. Methods: We retrospectively analyzed the data of neonates registered in the Japan Society of Obstetrics and Gynecology Successive Pregnancy Birth Registry System who were born 2013–2017. Exclusion criteria included stillbirths, delivery after 42 gestational weeks, and missing data. Logistic regression analyses were performed to investigate the maternal and perinatal factors associated with LBW in term singletons using the data of 715,414 singleton neonates. Results: The overall prevalence of LBW was 18.3%, and 35.7% of LBWs originated from singleton term pregnancies. Multiple logistic regression analyses indicated that both modifiable and non-modifiable factors were independently associated with LBW in term neonates. The modifiable maternal factors included pre-pregnancy underweight, inadequate gestational weight gain, and smoking during pregnancy, while the non-modifiable factors included younger maternal age, nulliparity, hypertensive disorders of pregnancy, cesarean section delivery, female offspring, and congenital anomalies. Conclusion: Using the Japanese pregnancy birth registry data, more than one-third of LBWs were found to originate from singleton term pregnancies. Both modifiable and non-modifiable factors were independently associated with LBW in term neonates. Prevention strategies on modifiable risk factor control will be effective in reducing LBW worldwide.

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切迫早産管理中に肺血栓塞栓症を発症した1例

緒形恵, 田中雄也, 春日義史, 内田志穂, 明石一浩, 池ノ上学, 西尾浩, 落合大吾, 青木大輔, 田中守

東京産科婦人科学会会誌 ((一社)東京産科婦人科学会) 71 ( 2 ) 349 - 354 2022.04

ISSN 2186-0599

緒言:肺血栓塞栓症(Pulmonary Thromboembolism:PTE)は母体死亡の7%に認める予後不良な疾患である。今回我々は切迫早産管理中にPTEを発症した1例を経験したので報告する。症例:42歳、2妊0産、妊娠29週4日に切迫早産の診断で入院した。安静度は病棟内フリーとした。妊娠33週3日、ベッドより離床した際に呼吸苦、動悸、脱力感を自覚し、胸部造影CTで両側肺動脈本幹および末梢に多数の造影欠損を認めたことから急性PTEと診断した。発症当日に緊急帝王切開術を施行し、児は2010gの女児、Apgar scoreは9/10点(1/5分値)であった。術後1日目より抗凝固療法を開始し、経過良好にて術後23日目に退院した。結論:安静臥床としていない切迫早産でもPTEを発症する可能性が示唆され、入院期間が長期になる場合はPTE発症に留意する必要があると考えられた。(著者抄録)

COVID-19流行期における妊娠糖尿病診断を考える

春日義史

糖尿病と妊娠 ((一社)日本糖尿病・妊娠学会) 22 ( 1 ) S - 30 2022.02

ISSN 1347-9172

緒言:本研究の目的は「妊娠中の糖代謝異常のスクリーニング〜COVID-19パンデミック対応〜」を検証することである。方法:妊娠24週未満診断妊娠糖尿病(E-GDM:304例)、妊娠24週以降診断GDM(L-GDM:264例)をおのおのCOVID-19流行期GDM診断基準にしたがって再分類した。結果:E-GDMのうち、41例は糖代謝異常、263例は非糖代謝異常に再分類された。また、L-GDMのうち、104例はGDMと再分類されたが、160例はGDMと再分類されなかった。結論:E-GDM、L-GDMともにCOVID-19流行期GDM診断基準では多くの症例が非糖代謝異常と診断された。(著者抄録)

DNA methylation analysis of cord blood samples in neonates born to gestational diabetes mothers diagnosed before 24 gestational weeks

Kasuga Y., Kawai T., Miyakoshi K., Hori A., Tamagawa M., Hasegawa K., Ikenoue S., Ochiai D., Saisho Y., Hida M., Tanaka M., Hata K.

BMJ Open Diabetes Research and Care (BMJ Open Diabetes Research and Care) 10 ( 1 ) 2022.01

Accepted

Introduction Genome-wide methylation analyses of gestational diabetes mellitus (GDM) diagnosed after 24 gestational weeks (late GDM (L-GDM)) using cord blood have been reported. However, epigenetic changes in neonates born to mothers with GDM diagnosed before 24 gestational weeks (early GDM (E-GDM)) have not been reported. We investigated DNA methylation in neonates born to mothers with E-GDM using cord blood samples. Research design and methods Genome-wide DNA methylation analysis was performed using an Illumina EPIC array to compare methylation rates of 754 255 autosomal sites in cord blood samples from term neonates born to 162 mothers with GDM (E-GDM: n=84, L-GDM: n=78) and 60 normal glucose tolerance (normal OGTT) pregnancies. GDM was diagnosed based on Japan Society of Obstetrics and Gynecology criteria modified with International Association of Diabetes in Pregnancy Study Group criteria. In this study, all GDM mothers underwent dietary management, while self-monitoring of blood glucose and insulin administration was initiated when dietary modification did not achieve glycemic control. Results There were no significant differences in genome-wide DNA methylation of cord blood samples between the GDM (E-GDM and L-GDM) groups and normal OGTT group or between the E-GDM and normal OGTT groups, L-GDM and normal OGTT groups, and E-GDM and L-GDM groups. Conclusions This is the first report to determine the DNA methylation patterns in neonates born to mothers with E-GDM. Neonates born to mothers with GDM, who were diagnosed based on Japan Society of Obstetrics and Gynecology criteria, may not differ in DNA methylation compared with those born to normal OGTT mothers.

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Adenocarcinoma in situ or early-stage cervical cancer is a risk factor for preterm delivery after cervical conization: a multicenter observational study

Kasuga Y., Ikenoue S., Nishio H., Yamagami W., Ochiai D., Tanabe K., Tashima Y., Hirao N., Miyakoshi K., Kasai K., Suda Y., Nemoto T., Shiraishi S., Yoshida H., Kurahashi T., Takamatsu K., Iwasaki S., Yamashita H., Akiba Y., Arase T., Hara S., Nakada S., Tanaka M., Aoki D.

Journal of Maternal-Fetal and Neonatal Medicine (Journal of Maternal-Fetal and Neonatal Medicine) 35 ( 25 ) 1 - 6 2022

ISSN 14767058

Objective: Pregnancy after conization is associated with a high risk of preterm delivery. However, because risk factors for preterm delivery after conization remain unknown, we conducted a multicenter observational study to investigate risk factors associated with preterm delivery. Methods: We selected patients who had previously undergone conization and reviewed medical records from 18 hospitals in cooperation with Keio University School of Medicine between January 2013 and December 2019. Women were classified as nulliparous and primiparous, and a multiple logistic regression analysis was performed to evaluate the relative contributions of the various maternal risk factors for preterm delivery (i.e. delivery before 37 gestational weeks). Results: Among 409 pregnant women after conization, 68 women delivered preterm (17%). The incidence of nulliparity (p =.014) was higher and a history of preterm delivery (p =.0010) was more common in the preterm delivery group than in the term delivery group. Furthermore, the proportion of women diagnosed with adenocarcinoma in situ (AIS) and cervical cancer in the preterm delivery group was higher than that in the term delivery group (p =.0099 and.0004, respectively). In multiple regression models in nulliparous women, cervical cancer or AIS (Odds ratio [OR]: 4.16, 95% CI: 1.26–13.68, p =.019) and a short cervix in the second trimester (OR: 13.41, 95% CI: 3.88–46.42, p <.0001) increased the risk of preterm delivery. Furthermore, a history of preterm delivery (OR: 7.35, 95% CI: 1.55–34.86, p =.012), cervical cancer or AIS (OR: 5.07, 95% CI: 1.24–20.73, p =.024), and a short cervix in the second trimester (OR: 4.29, 95% CI: 1.11–16.62, p =.035) increased the risk of preterm delivery in the multiple regression models in primiparous women. Conclusion: Pregnant women who previously underwent conization are at risk for preterm delivery. The histological type of AIS and cervical cancer was evaluated as a risk factor for preterm delivery. KEY MESSAGES Prior preterm delivery, presence of a short cervix, and cervical cancer or AIS were predictors of preterm delivery after conization. The depth of conization in cervical cancer or AIS group was significantly larger than that in the CIN group.

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Prophylactic administration of human amniotic fluid stem cells suppresses inflammation-induced preterm birth via macrophage polarization

Abe Y., Ochiai D., Kanzaki S., Sato Y., Otani T., Ikenoue S., Kasuga Y., Tanaka M.

Molecular and Cellular Biochemistry (Molecular and Cellular Biochemistry) 478 ( 2 ) 363 - 374 2022

ISSN 03008177

Ascending inflammation from the vagina is a major cause of preterm birth. Currently, this condition—especially when uncontrolled—has no effective treatment. Human amniotic fluid stem cells (hAFSCs) are mesenchymal stem cells known to exert potent anti-inflammatory effects in animal models of perinatal diseases, such as periventricular leukomalacia, myelomeningocele, and neonatal sepsis. However, hAFSC therapy for inflammation-induced preterm birth has not been tested. In order to determine the therapeutic effect of hAFSC transplantation, we employed a preterm mouse model of ascending infection; this model was constructed by administering lipopolysaccharide to pregnant mice. We investigated the preterm birth rate and evaluated the inflammation of tissues, which is related to progressive infections, such as those involving the cervix, placenta, and lavage cells, using real-time qPCR. Further, we tracked the fluorescence of fluorescently labeled hAFSCs using an in vivo imaging system, and hAFSC aggregation was evaluated using immunohistochemistry analysis. We also investigated the presence of multiple types of peritoneal macrophages via flow cytometry analysis. Finally, we performed sphere culturing and co-culturing to determine the therapeutic effects of hAFSCs, such as their anti-inflammatory effects and their potential to alter macrophage polarization. We found that hAFSC administration to the peritoneal cavity significantly reduced inflammation-induced preterm birth in the mouse model. The treatment also significantly suppressed inflammation of the placenta and cervix. Transplanted hAFSCs may have aggregated with peritoneal macrophages, switching them from an inflammatory to an anti-inflammatory type. This property has been reported in vivo previously, but here, we examined the effect in vitro. Our findings support the hypothesis that hAFSCs suppress inflammation and reduce preterm birth by switching macrophage polarity. This study is the first to demonstrate that hAFSCs are effective in the treatment and prevention of inflammation-induced preterm birth.

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Deep neural network-based classification of cardiotocograms outperformed conventional algorithms

Ogasawara J., Ikenoue S., Yamamoto H., Sato M., Kasuga Y., Mitsukura Y., Ikegaya Y., Yasui M., Tanaka M., Ochiai D.

Scientific Reports (Scientific Reports) 11 ( 1 ) 13367 2021.12

Accepted

Cardiotocography records fetal heart rates and their temporal relationship to uterine contractions. To identify high risk fetuses, obstetricians inspect cardiotocograms (CTGs) by eye. Therefore, CTG traces are often interpreted differently among obstetricians, resulting in inappropriate interventions. However, few studies have focused on quantitative and nonbiased algorithms for CTG evaluation. In this study, we propose a newly constructed deep neural network model (CTG-net) to detect compromised fetal status. CTG-net consists of three convolutional layers that extract temporal patterns and interrelationships between fetal heart rate and uterine contraction signals. We aimed to classify the abnormal group (umbilical artery pH < 7.20 or Apgar score at 1 min < 7) and the normal group from CTG data. We evaluated the performance of the CTG-net with the F1 score and compared it with conventional algorithms, namely, support vector machine and k-means clustering, and another deep neural network model, long short-term memory. CTG-net showed the area under the receiver operating characteristic curve of 0.73 ± 0.04, which was significantly higher than that of long short-term memory. CTG-net, a quantitative and automated diagnostic aid system, enables early intervention for putatively abnormal fetuses, resulting in a reduction in the number of cases of hypoxic injury.

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【DOHaDとCOVID-19】コロナ禍におけるDOHaD研究の状況と学会支援の必要性

濱田裕貴, 春日義史, 久保佳範

DOHaD研究 ((一社)日本DOHaD学会) 10 ( 1 ) 1 - 5 2021.12

ISSN 2187-2562

Prepregnancy assessment of liver function to predict perinatal and postpregnancy outcomes in biliary atresia patients with native liver

Takahashi N., Ochiai D., Yamada Y., Tamagawa M., Kanamori H., Kato M., Ikenoue S., Kasuga Y., Kuroda T., Tanaka M.

Journal of Clinical Medicine (Journal of Clinical Medicine) 10 ( 17 ) 2021.09

Accepted, ISSN 2077-0383

Considering that some biliary atresia (BA) survivors with native liver have reached reproductive age and face long‐lasting complications, specific attention needs to be paid to pregnant cases. This study aimed to investigate the relationship between liver function, perinatal outcomes, and prognosis. A database review was conducted to identify pregnant BA cases with native liver and perinatal data, and clinical information on BA‐related complications was analyzed. Perinatal serum cholinesterase (ChE) levels, model for end‐stage liver‐disease (MELD) score, and platelet trends were analyzed, and the association between these indicators and perinatal outcomes was investigated. Patients were categorized into three groups according to the perinatal clinical outcomes: favorable (term babies with or without several episodes of cholangitis; n = 3), borderline (term baby and following liver dysfunction; n = 1), and unfavorable (premature delivery with subsequent liver failure; n = 1). Lower serum ChE levels, lower platelet counts, and higher MELD scores were observed in the unfavorable category. Borderline and unfavorable patients displayed a continuous increase in MELD score, with one eventually needing a liver transplantation. Pregnancy in patients with BA requires special attention. Serum ChE levels, platelet counts, and MELD scores are all important markers for predicting perinatal prognosis.

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Clinical results of a massive blood transfusion protocol for postpartum hemorrhage in a university hospital in japan: A retrospective study

Ochiai D., Abe Y., Yamazaki R., Uemura T., Toriumi A., Matsuhashi H., Tanaka Y., Ikenoue S., Kasuga Y., Tanosaki R., Tanaka M.

Medicina (Lithuania) (Medicina (Lithuania)) 57 ( 9 ) 2021.09

Accepted, ISSN 1010660X

Background and objectives: Massive postpartum hemorrhage (PPH) is the most common cause of maternal death worldwide. A massive transfusion protocol (MTP) may be used to provide significant benefits in the management of PPH; however, only a limited number of hospitals use MTP protocol to manage massive obstetric hemorrhages, especially in Japan. This study aimed to assess the clinical outcomes in patients in whom MTP was activated in our hospital. Materials and Methods: We retrospectively reviewed the etiology of PPH, transfusion outcomes, and laboratory findings among the patients treated with MTP after delivery in our hospital. Results: MTP was applied in 24 cases (0.7% of deliveries). Among them, MTP was activated within 2 h of delivery in 15 patients (62.5%). The median estimated blood loss was 5017 mL. Additional procedures to control bleeding were performed in 19 cases, including transarterial embolization (18 cases, 75%) and hysterectomy (1 case, 4.2%). The mean number of units of red blood cells, fresh frozen plasma, and platelets were 17.9, 20.2, and 20.4 units, respectively. The correlation coefficients of any two items among red blood cells, fresh frozen plasma, platelets, blood loss, and obstetrical disseminated intravascular coagulation score ranged from 0.757 to 0.892, indicating high levels of correlation coefficients. Although prothrombin time and activated partial thromboplastin time levels were significantly higher in the <150 mg/dL fibrinogen group than in the ≥150 mg/dL fibrinogen group at the onset of PPH, the amount of blood loss and blood transfusion were comparable between the two groups. Conclusions: Our MTP provides early access to blood products for patients experiencing severe PPH and could contribute to improving maternal outcomes after resuscitation in our hospital. Our study suggests the implementation of a hospital-specific MTP protocol to improve the supply and utilization of blood products to physicians managing major obstetric hemorrhage.

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The efficacy of transarterial embolization for postpartum hemorrhage complicated with disseminated intravascular coagulation: A single‐center experience

Ochiai D., Nakatsuka S., Abe Y., Ikenoue S., Kasuga Y., Inoue M., Jinzaki M., Tanaka M.

Journal of Clinical Medicine (Journal of Clinical Medicine) 10 ( 18 ) 2021.09

Accepted, ISSN 2077-0383

Indications for the use of transarterial embolization (TAE) for postpartum hemorrhage (PPH) have been established. However, the efficacy of TAE for PPH complicated by disseminated intravascular coagulation (DIC) remains controversial. In this study, we investigated the efficacy of TAE for PPH complicated by DIC. A database review was conducted to identify patients who were treated with TAE for PPH at our hospital. TAE was performed in 41 patients during the study period. Effective hemostasis was achieved in all cases, but additional procedures, such as reembolization or hysterectomy, were required in five patients (12.2%). The typical causes of PPH included uterine atony (18 cases), placenta previa (15 cases), amniotic fluid embolism (DIC‐type) (11 cases), and placenta accreta spectrum (10 cases). The mean blood loss was 3836 mL. The mean obstetrical DIC and the International Society on Thrombosis and Hemostasis DIC scores were 7.9 and 2.6, respectively. The efficacy of hemostasis was comparable between patients with and without DIC. However, the complete success rate of TAE was lower in patients with DIC as the condition worsened than that in non‐DIC patients. Overall, TAE is effective as a minimally invasive treatment for PPH complicated by DIC.

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