背景：以杜卜勒超音波，分析精索靜脈曲張患者與健康人睪丸內部脈動指數與阻力 指數之間的差異。材料及方法：我們將那些接受過睪丸超音波的患者納入研究分析，利 用12-MHz 的強力杜卜勒超音波來測量睪丸內部動脈的脈動指數與阻力指數，此外靜脈 曲張的程度是依照身體檢查來判斷。結果： 共有44 名左側精索靜脈曲張患者以及12 名 健康男性納入本研究，這兩組的右側睪丸的脈動指數及阻力指數是差不多的(p=0.31 及 0.404)，然而病患的左側睪丸比健康者有較高的阻力指數(p=0.013)。病患的左側睪丸比右 側有較高的阻力指數，也比較小(p=0.036 及0.001)，此外在於不同程度的靜脈曲張中尚未 發現在脈動指數、阻力指數及睪丸大小上有顯著差異。結論：研究結果發現阻力指數在精 索靜脈曲張患者較高，因此我們認為精索靜脈曲張對於睪丸內部的血流狀況有顯著影響。

Background: To investigate difference in intratesticular arterial pulsatility index (PI) and resistance index (RI) between varicocele and healthy testes using power Doppler ultrasonography. Materials and Methods: Patients undergoing scrotal ultrasonography were recruited. PI and RI of the intratesticular artery were measured using a 12-MHz power Doppler ultrasound, and varicocele grades were obtained by physical examination. Results: Forty-four males with left scrotal varicocele and 12 healthy males were included. PI and RI were similar in the right testis between groups (p = 0.31 and 0.404, respectively), but significantly higher RI in the left varicocele testis (p = 0.013). The left testes of varicocele patients had a higher RI and smaller size than their right testes (p= 0.036 and 0.001, respectively). No significant differences in PI, RI, and testicular size between different varicocele grades were observed. Conclusions: The study findings reveal that RI was higher in the varicocele testis. Thus, varicocele may have influence in the vascularity and circulation within the testis.