超声引导穿刺时对探头的选择

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                    <p style="line-height: 2em; text-indent: 2em;">腹部穿刺一般选用凸阵或相控阵探头，探头频率一般3.5～5MHzs；经直肠及经阴道穿刺一般选用腔内探头，探头频率一般5～7MHz；浅表器官的穿刺一般选择线阵探头，频率5～10MHz。 &nbsp; &nbsp;&nbsp;</p><p style="line-height: 2em; text-indent: 2em;"><br  /></p><p style="text-align:center"><img data-s="300,640" data-type="jpeg" src="http://mmbiz.qpic.cn/mmbiz_jpg/dx3KibwtDhveep4Z6gSY6kQfsOCMozVBJ65UL8HEsPkzWnN05bPdod9Gzk3WoVn1OfzX2BiaycPUXHfibuicjN20Ew/0?wx_fmt=jpeg" data-ratio="0.5699481865284974" data-w="386"  /></p><p style="text-align:center"><br  /></p><p style="line-height: 2em; text-indent: 2em;">在进行腹部超声引导穿刺时，多选择电子相控扫描，其原因是这探头体积较小，操作灵活，可在肋间等狭小部位应用;接触皮肤的底面小而平整，因此操持稳定，有利于瞄准及穿刺操作，并且进针点较接近穿刺目标，这是此类探头引导穿刺的优势。该探头虽小但深部图像展开成扇形，视野较开阔。在腹部介入性超声的应用中，电子相控阵探头的优势显得更为明确。&nbsp;</p><p style="line-height: 2em; text-indent: 2em;">常用穿刺探头的种类较多，不同类型的探头，其性能、作用亦不尽相同，选择时以能适合各种部位的穿刺需要为原则，适宜的探头对精确引导穿刺至关重要。 &nbsp;</p><p><br  /></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); line-height: 1.75em; box-sizing: border-box !important; 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