Objective:To study the current status of research in the field of iodine nutrition for pregnant women and to detect the hot spots and future trends in the field of iodine nutrition for pregnant women.Methods:Using "pregnant women" and "iodine" as search terms, we searched the literature related to iodine nutrition in pregnant women from January 2000 to December 2021 in China Knowledge Network (CNKI) database, Wanfang database and Chinese Medical Journal Full Text Database. CiteSpace 6.2.2.0 software was used to sort out the publication status, core authors and research hotspots of the papers.Results:A total of 879 valid papers were included, with an overall number of publications increasing trend from 2000 - 2021 and a decline after 2017. Among the 879 papers, 29 first authors were core authors (M≈3), and 109 papers were published, accounting for 12.40% of the total literature; several research groups with relatively stable collaborative relationships had been formed, with the larger collaborative team of Chen Zupei and Zhang Wanqi at Tianjin Medical University. Keyword co-occurrence analysis showed that pregnant women, urinary iodine, and iodine nutrition were high-frequency keywords; keywords with mediated centrality > 0.07 were pregnant women (0.48), pregnancy (0.40), urinary iodine (0.37), iodine deficiency disorders (0.25), iodine nutrition (0.20), thyroid (0.12), thyroxine (0.10), infants and children (0.09). The analysis of the emergent words showed that the evolution of iodine nutrition research themes in pregnant women was broadly based on studies of iodine nutrition monitoring results in key populations such as newborns and infants from 2000 - 2011, studies such as the range of thyroxine reference values during pregnancy from 2012 - 2016, and changes in iodine nutrition status of pregnant women and children after adjustment of iodized salt concentration from 2017 - 2021. The clustering results showed that a total of 355 keywords were aggregated to yield 10 clusters, and the average profile value of clusters (Silhouette) > 0.8, which was a reasonable clustering result; the study topics can be divided into three major categories, iodine nutrition and goiter monitoring results in key populations, thyroid hormones and pregnancy outcomes during pregnancy, and studies on thyroid-related diseases.Conclusions:Iodine plays an important role in the health of pregnant women and their offspring, and changes in the iodine nutrition status of pregnant women should be closely monitored. In response to the new trends of change that are currently present, multidisciplinary cooperation should be developed to respond to social concerns and jointly promote the maintenance of iodine nutrition in pregnant women at appropriate levels.

Patients with cyclic vomiting syndrome usually have comorbid psychological disorders,the trigger and aggravating factors of gastrointestinal symptoms.It may decrease the quality of life and the response to the conventional therapies,bring the patients to seek medical care frequently and perform unnecessary examinations,result in the waste of medical resources.We reported a 20-year-old woman with complaint of recurrent vomiting since infant,and less response to symptomatic and supportive treatment.Her vomiting relieved with antidepressant after consultation with gastroenterological specialist and psychologist.Physicians should pay more attention to recognize the comorbid psychological disorders in patients with functional gastrointestinal disorders (FGIDs),including cyclic vomiting syndrome.It is important to refer the patients with refractory symptoms to the psychologists for further professional evaluation and antidepressants.

Background/Aims: A strong correlation between depression and irritable bowel syndrome with diarrhea (IBS-D) has been identified. The aim of this study is to identify the correlations among depression, structural factors, gastrointestinal (GI) and extra-GI symptoms, and efficacy of neuromodulators in patients with IBS-D. Methods: Patients meeting the Rome III Diagnostic Criteria for IBS-D were enrolled. The intestinal symptoms and psychological states were evaluated using IBS-specific symptom questionnaires and Hamilton Depression Rating Scale. Results: In total, 410 patients with IBS-D were enrolled, 28.8% (118/410) had comorbid depression. Patients with depression did not readily experience improvement in abdominal pain/discomfort after defecation, and had a higher prevalence of passing mucus, overlapping functional dyspepsia, and extra-GI symptoms. The structural factor “mental disorders” significantly correlated with main bowel symptom score and degree of pre-defecation abdominal pain/discomfort. No structural factor significantly correlated with bowel movements or stool form. Patients who had passing mucus, overlapping functional dyspepsia and extra-GI painful symptoms have higher score of “anxiety/somatization.” Patients with sexual dysfunction have higher score of “retardation symptoms.” In total, 28.3% of patients with IBS-D were prescribed neuromodulators. Baseline scores of “anxiety/somatization” and “retardation symptoms” positively correlated with improvement of diarrhea after paroxetine, and “sleep disturbances” positively correlated with improvement of abdominal pain/discomfort and diarrhea after mirtazapine. Conclusions Comorbid depression and higher scores of structural factors might aggravate GI and extra-GI symptoms other than bowel movements and stool form. Structural factors of Hamilton Depression Rating Scale correlated with efficacy of paroxetine and mirtazapine in patients with IBS-D.