Hydrogel is a kind of degradable hydrophilic polymer, but excessive hydrophilicity leads to larger volume, lower elastic modulus and looser structure, which further affect its use. Especially in the field of biomedical engineering, excessive swelling of the hydrogel can compress the nerves and improve degradation rate resulting in mismatch of tissue growth and released ions. Therefore, anti-swelling hydrogel has been a research hotspot in recent years. This paper reviews the recent research progress on anti-swelling hydrogel, and expounds the application mechanism and preparation method of hydrogel in biomedical engineering, aiming to provide some references for researchers in the field of anti-swelling hydrogel.
ObjectiveTo investigate the clinicopathological features, diagnosis and treatment of invasive micropapillary carcinoma (IMPC) of the breast.MethodThe relevant literatures at home and abroad in recent years about the clinical features, pathological features and diagnosis and treatment of IMPC were reviewed.ResultsIMPC is in low incidence and mostly in mixture. Because the clinical manifestations of IMPC and invasive ductal carcinoma of breast are basically similar, only the typical pathological features in pathological examination can confirm the diagnosis as " inside-out growth pattern” and " morula-like clusters of cancer cells surrounded by clear stromal spaces”.ConclusionsIMPC is a special subtype of breast invasive carcinoma, which should be pay enough attention to it in clinic due to its unique microscopic morphology, high vessel invasiveness and high lymph node metastasis rate, high malignancy, poor prognosis and so on.
目的 探討伴顳下頜關節紊亂病（TMD）的成人正畸患者的心理社會因素。 方法 2009年5月－2011年12月伴TMD的成人正畸患者42例為觀察組，無矯正要求、伴TMD的錯牙合患者50例為對照組。采用九十項癥狀清單（SCL-90）、艾森克人格問卷（EPQ）進行測試，同時進行TMD調查。 結果 觀察組與對照組相比，得分較高的有強迫、焦慮、抑郁、人際關系敏感等因素，差異有統計學意義（P＜0.05）；觀察組患者P量表、N量表得分高于對照組，差異有統計學意義（P＜0.05）。 結論 伴TMD的成人正畸患者心理健康問題普遍存在,傾向于神經質和精神質的人格特征。