![经自然腔道取标本手术:结直肠肿瘤](https://wfqqreader-1252317822.image.myqcloud.com/cover/36/27612036/b_27612036.jpg)
第三节 手术操作步骤、技巧与要点
【探查与手术方案制定】
按照肝脏、胆囊、胃、脾脏、大网膜、结肠、小肠、直肠和盆腔顺序逐一进行探查(图3-7、图3-8)。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-7_39144.jpg?sign=1738888421-UnJmaP9avRMAfKCNUlw8LmGgSvanFCCs-0-fdb9a680d4e7346717e1d846b75fea25)
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腹腔镜下低位直肠肿瘤常无法探及,大多数肿瘤位于腹膜返折以下(图3-9)。术者可以用右手行直肠指诊,与左手操作钳进行会合,来判定肿瘤位置及大小,是否适合行该手术(图3-10)。
包括对乙状结肠、直肠系膜的肥厚程度,血管弓的长度,预切除范围的判定(图3-11、图3-12)。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-9_39152.jpg?sign=1738888421-KUUQWECCYdoQHpNkTTaSmOGiDvpb4iWF-0-413a7553c214f6f70d43ce9c45051b49)
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![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-11_39257.jpg?sign=1738888421-Nf8Ez8dZEAMKL84CqX39EyjTNga1vUAA-0-35385bc1b5f6b3c92e2d1eaa4c9bb922)
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【解剖与分离】
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P51_0442_39381.jpg?sign=1738888421-pr3Y8qcZrnDlhxARx74LJXkgSXkRzUjM-0-19193c6247f7394a57c5cf3c61ffd26e)
患者取头低足高体位,用1/2纱布条将小肠挡于上腹部,能显露整个盆腔及肠系膜下动静脉根部。第一刀切入点在骶骨岬下方3~5cm,尤其是肥胖患者,往往有一菲薄处,用超声刀从此处开始游离(图3-13、图3-14)。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-13_39374.jpg?sign=1738888421-DbbyoiFIEZCNQthGaJ0S6T4K7sKSQucy-0-58dff42963f15056bf990cad1a197859)
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沿Toldts间隙上下分离,直肠系膜能提起有一定空间,再开始向肠系膜下动静脉根部游离(图3-15)。同时,向左侧沿Toldts间隙上下扩大空间。可见游离平面光滑、平整、干净,清晰可见左侧输尿管走行及蠕动(图3-16)。肠系膜下动脉根部毗邻关系清晰,遂用超声刀分离清扫根部脂肪结缔组织,充分裸化后,双重结扎切断肠系膜下动静脉(图3-17~图3-20)。勿用超声刀上下剥离,而应选定切除线,由近及远整块分离,血管根部不易裸化过长,够结扎即可。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-15_39490.jpg?sign=1738888421-tUXXcMQit8EudEnuUgzyuQstDcAFt8jf-0-0c8915c4dba8802324204a2976a78297)
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当肠系膜下动静脉离断后,助手左手钳提起直肠右侧系膜,右手钳提起肠系膜下动静脉断端翻转,术者沿Toldts间隙进一步向外向下分离乙状结肠系膜至右髂总动脉处(图3-21),用一纱布条垫于此处系膜后方(图3-22)。沿骶前间隙分离,可见下腹下神经,在其分叉处向左右分离,在神经表面用超声刀匀速推行分离(图3-23)。沿骶前间隙向下向左右游离(图3-24、图3-25),向下至尾骨水平。两侧可见肛提肌(图3-26)。
如果直肠后壁游离充分,直肠右侧分离则容易进行,如同一层薄膜。助手左手钳提起膀胱底(男性患者)或用举宫器将子宫举起(女性患者),右手提起直肠系膜,直肠系膜边界清楚可见(图3-27)。用超声刀沿解剖界限分离至腹膜返折,并横行切开腹膜返折右侧(图3-28)。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-21_39824.jpg?sign=1738888421-EROkgfUHLpuZlAvfZJ1OiCSg0cCjmlpk-0-df7056dae5cb9ad43bf12950a420cd00)
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打开乙状结肠与腹壁粘连处(图3-29),并由外侧向内侧分离,注意保护生殖血管和输尿管。将乙状结肠翻向右侧,可见系膜后方的纱布条(图3-30),按其标识打开系膜,可以防止输尿管等组织器官的损伤。向上方游离时,多数病例不需要游离结肠脾曲,向下方沿解剖边界游离至腹膜返折处与右侧会师(图3-31、图3-32)。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-29_40055.jpg?sign=1738888421-JSlH0tBbbv072OoMTVwa4K6kkOiAPg4r-0-2760ec9cd4ac6652722323343accb52c)
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沿直肠前壁向下分离,显露双侧精囊(男性患者)或阴道后壁(女性患者)。此时,助手做直肠指诊再次确认肿瘤位置,力争超过肿瘤下缘2~3cm。同时,分别进一步裸化直肠右侧肠壁及左侧肠壁(图3-33、图3-34)。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-33_40269.jpg?sign=1738888421-Sbhna4db2sAzfnIKgm407LTqombvwz4E-0-b4bcd9ba0d0a7303046e7a60ee77440c)
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将乙状结肠拉向左侧,在系膜后方垫入纱布(图3-35),目测裁剪范围,确定吻合预切定线(图3-36)。进一步向预切线游离,靠近肠壁时尽量不用血管夹,避免吻合时嵌入。超声刀游离至肠壁并尽量裸化肠管2~3cm(图3-37、图3-38)。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-35_40279.jpg?sign=1738888421-eBxqJ967Cos8dhT8qez99whjMD0kEeZd-0-06f31559722d981a89a420151fc5fba2)
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【标本切除与消化道重建】
严格遵循无菌原则和无瘤原则,经肛门置入无菌塑料保护套,至肿瘤上方5cm。用卵圆钳夹持抵钉座,经肛门保护套内肿瘤的对侧滑入直肠近端,至预切定线上方(图3-39、图3-40)。观察肠管血运,用直线切割闭合器在裸化的肠管预切线处切割闭合乙状结肠(图3-41),并将抵钉座留在乙状结肠肠腔内。用碘伏纱布条消毒断端。经肛置入卵圆钳伸至直肠断端,夹持肠系膜断端及肠壁,将直肠外翻拉出肛门外(图3-42,图3-43)。标本翻出体外后,肿瘤位置清晰可见。用碘伏盐水冲洗,确认无误后用凯途闭合器在肿瘤下缘1~2cm切断直肠(图3-44)。移除标本,直肠断端可自行还纳回腹腔。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P61_0525_67813.jpg?sign=1738888421-iu5SmwcP0bAXJjUJ6H7CayzuuPx0qWD4-0-b89a24e3f9913633e0a27e8055fafe0f)
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充分进行扩肛,经肛注入碘伏盐水,在腹腔镜下观察直肠断端有无渗漏;在乙状结肠断端将抵钉座连接杆取出(图3-45)。经肛置入环形吻合器,完成乙状结肠直肠端-端吻合术(图3-46~图3-48)。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-45_40834.jpg?sign=1738888421-QUxwMJPo6K9C82qyEjOxQwAVR9rEfeUn-0-7698b822836b8e771151a4283ca22d06)
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用直线切割闭合器在裸化的肠管预切线切割闭合乙状结肠(图3-49),用碘伏纱布条消毒断端。助手将卵圆钳经肛门伸至直肠残端,夹持肠系膜残端及肠壁。将直肠匀速外翻拉出肛门外(图3-50)。外翻后切开肠壁(图3-51),经外翻后的肠壁通道将抵钉座送入盆腔(图3-52)。用碘伏盐水冲洗标本,无误后用凯途闭合器在肿瘤下缘1~2cm切断直肠(图3-53、图3-54)。移除标本。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-49_40953.jpg?sign=1738888421-gLEI8hVE0gjpvFSbIVHE5Yqhk89iwjbM-0-0d6f1bc2a941a3eb077b929ff67ef4ed)
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![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-53_41168.jpg?sign=1738888421-tTZgcuVG9OtYvQXAyZjsgI4TTwb5TwBV-0-197ea27ea73dea7363dc9ab846262dee)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-54_41171.jpg?sign=1738888421-EwRCmSe4SPziyjYnKWSKtIkKI8q3KvH9-0-496fce2ccfb68c79e2d01101e6070998)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P67_0581_41175.jpg?sign=1738888421-FzPJkOPahm1M2ofex6LoxTmldACMil4Z-0-68607c0f7314021f8e99bd06e58972fe)
在乙状结肠断端处肠壁切开一小口,并用碘伏纱布条进行消毒(图3-55),将抵钉座置入乙状结肠肠腔内(图3-56),用直线切割闭合器关闭乙状结肠切口(图3-57)。在乙状结肠断端将抵钉座连接杆取出(图3-58)。经肛门置入环形吻合器,旋出穿刺杆,行乙状结肠直肠端-端吻合(图3-59)。并通过注水注气试验检查吻合口通畅确切,生理盐水冲洗,确切止血,分别经左右下腹戳卡孔放置引流管(图3-60、图3-61)。对于超低位保肛患者,也可经肛对吻合口进行加固缝合(图3-62)。
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-55_41280.jpg?sign=1738888421-elQeA0ypH1yN9IOvzuCsrSiWpgb24C5g-0-de86083233d2ff1a987485829de14849)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-56_41283.jpg?sign=1738888421-v7HD0caNCwqC7YCP7nA4r7g5vQeb2tMP-0-909ca7b642dea54c661e75247151dc6c)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-57_41286.jpg?sign=1738888421-f045R23GTSVQlvraWwYSIWaeyeCe4Mes-0-ead7438c5721bd309a3e6eb278d3548e)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-58_41389.jpg?sign=1738888421-07T3NOar6TNMz3a4eYdagP0TVs1SVuET-0-9e928c593245c518673bfbfceba59d7d)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-59_41392.jpg?sign=1738888421-688CcIcYo9Y8wJCkbj7vjZj83y3v17Yu-0-45389ba1423ab2f9adafc1d4b603af1c)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-60_41395.jpg?sign=1738888421-WrOcnCD1DtSSPtPSOQDdtWgEC1VKuanI-0-dfc648d4dd4b4d313272c94d0a36575a)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-61_41500.jpg?sign=1738888421-rab25C3vV1QHjttwkW6HHCGvTDIrmARR-0-7771e8fc464d4a0202418ba23026f6ad)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-62_41503.jpg?sign=1738888421-fuEORRAuwIVKMM5gNf4t5AIgnjH6oASa-0-0a0e31b434d9d7be60570f90b54b29f7)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P70_0607_41508.jpg?sign=1738888421-EmRbC39vjDyQdfLdPPkJb2dhu4QEvBlo-0-3c98643848509bd66c71ff8631549643)
【术后腹壁及标本展示】(图3-63,图3-64)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-63_41507.jpg?sign=1738888421-p8KCUfwMYguRFfIg5JKyuWyPlrk45evZ-0-69ded2c3e9ca026eb605dae1b0388c3a)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P71_0612_41616.jpg?sign=1738888421-92YTWqwDFLuyIPvypQK3WoT2AK3tVatJ-0-34951e568b3e63402ccf4bc2fc652922)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-64_41617.jpg?sign=1738888421-vT4QCiyZMu6kUQRgplWRcz5BaaPt0haW-0-9434f3fd9a14ec8d0c49af3446c07fd7)