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題 名 | Color Doppler Ultrasound of Spiral Arteries in Normal Second-Trimester Pregnancies=利用彩色杜卜勒超音波測量第二個妊娠三月期正常旋狀動脈血流波形 |
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作 者 | 洪正修; 吳香達; 潘亞平; 楊明智; 舒麗萍; | 書刊名 | 中華醫學雜誌 |
卷 期 | 59:5 1997.05[民86.05] |
頁 次 | 頁289-294 |
分類號 | 417.143 |
關鍵詞 | 彩色杜卜勒超音波; 旋狀動脈; Color doppler waveform; Spiral artery; |
語 文 | 英文(English) |
中文摘要 | 背景:第二個妊娠三月期正常旋狀動脈血流波形的血流阻力值迄今尚未有人報告,本研究目的在建立第二個妊娠三月期胎盤旋狀動脈血流波形之阻力正常值,期以此正常的血流阻力值做為評估第二個妊娠三月期時發生異常的子宮胎盤血流循環之用。 方法:利用彩色杜卜勒超音波儀測量175位正常妊娠十三到二十五禮拜間旋狀動脈的血流速波形收縮期比舒張期指數值(S/D)及血流阻力指數值(RI),並分別建立其第五、第五十、及第九十五之百分比值。 結果:妊娠十三週到二十五週之間旋狀動脈血流波形之S/D估計值隨妊娠齡增加而遞減(Y=1.96258-0.02061x妊娠週數,Adjusted R2 = 0.03773, p = 0.003),其RI值也同樣隨妊娠齡增加而遞減(Y=0.52131-0.00871x妊娠週數,Adjusted R2 = 0.03797, p = 0.003)。 結論:第二個妊娠三月期正常胎盤旋狀動脈血流波形之血流阻力值,隨著妊娠週數增加而遞降。此事實表示,於正常的第二個妊娠三月期內,絨毛滋養細胞持續侵入懷孕時的旋狀動脈血管壁,因而造成此血管內之血流阻力降低。 |
英文摘要 | Background: Blood flow resistance of the subplacental spiral arteries in second-trimester pregnancies has not been previously reported. A reference range of blood flow resistance of the subplacental spiral arteries at 13-25 gestational weeks was designed in the hope the reference data could provide a basis for Doppler studies of pathologic disorders in second-trimester pregnancies. Methods: A cross-sectional study was performed in 175 uncomplicated pregnancies at 13-25 gestational weeks. Doppler flow examinations of the subplacental spiral arteries were done. Results: In the 175 normal pregnancies, both the predicted systolic/ diastolic ratios(S/D) (Y=1.96258-0.020615 gestational age (GA), adjusted R2= 0.03773, p=0.003) and resistance indices(RI) (Y= 0.52131-0.008715GA, adjusted R2=0.03797, p=0.003) of the subplacental spiral arteries decreased progressively with advancing gestational age. The predicted S/D value of the subplacental spiral artery decreased from 1.695 at the 13th week's gestation (5th%= 1.221, 95th%= 2.169) to 1.468 at the 24th week's gestation (5th%=1.057, 95th%= 1.878). The predicted RI value of the subplacental spiral artery also decreased from 0.408 at the 13th week's gestation (5th%= 0.193, 95th%= 0.623) to 0.312 at the 24th week's gestation (5th%= 0.148, 95th%=0.477). Conclusions: Normal blood flow resistance of the subplacental spiral arteries at 13-25 gestational weeks decreases progressively with advancing gestational age. The fact suggests that trophoblastic invasion of the spiral arteries occurred continuously throughout normal second-trimester pregnancies. |
本系統中英文摘要資訊取自各篇刊載內容。