![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=1739030030-IaUJke6Vqx5jfEQmPVQl88qc6vLdoTVk-0-9077b774c5d0a4422f0d35af372dd585)
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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=1739030030-8GV2Jvn4EXtVghxSL13hJSSqPIOD2vcz-0-6ae827cf28dd80f9e39635172c14cc90)
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【解剖与分离】
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P51_0442_39381.jpg?sign=1739030030-HMSy2jk8Um9tNLAxXPlUdgHKqu9xcely-0-ce5b4c6a0e3a03ef540fb8328c78e29c)
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=1739030030-ZoEOsCawZsaqtJp6S7VpGYVmEZQDhRul-0-1ebc8f2ba85a41f9fc8ba727de757267)
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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=1739030030-8xWIvvsGVTiL7ogA9QuwV1cNvf7hw2pR-0-03d47f4db362638c04c9dff4ef3c668e)
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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=1739030030-T3eXD4X6KxaGGV5xxlsa5yrWpei8JMCH-0-6bb20537de906f0f50c6a98d02babc86)
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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=1739030030-DglC5L58nG78v80ibyrR2DI5pwtJmgDR-0-aefb95284f065937592fe8663c58e2eb)
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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=1739030030-xoz00s7NpYtWk9QkQE359V5vFnSeWJh3-0-a1c6caafe00a037cb77371dbf9f554e2)
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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=1739030030-BKUcb273vMZjBimCCnsKAXuD25tOhlys-0-8fc35c5e47f608f65cfd271f65e42618)
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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=1739030030-yeCpdWoL4IrHyLtoBERwuJBDm0w9SGTl-0-fd89d6f37e7af505d7e17c333fcbaddd)
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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=1739030030-DuWnGBco544XytcMMh3TFJ3Y4ukC8pqo-0-146487cd8d30f3317f23fa4b32dda4f7)
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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=1739030030-DKqzMnZuDycVKgqBOtvq9lwzw5SvYRoJ-0-4db15b49986c2e9c5dfaa632b6c4a452)
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![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-53_41168.jpg?sign=1739030030-to15RU3WunpSEDo82WRTboQkm1qrBHEY-0-bb545470520c709b7e5956c7597a5bcc)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-54_41171.jpg?sign=1739030030-4lYGGYZd1BjRjkcgWI1rVkFfOmxBwLcB-0-0ad20f585250fe65635df0c7558231ea)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P67_0581_41175.jpg?sign=1739030030-TGVoFcjhal43jiFeoj24OPHQEtMYNaFL-0-6123c7d5291d78bf4b547ca822edea47)
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=1739030030-d4uaxIHCfofj0si38k1SKfah97932PJp-0-1beda55db7d03896ef463280ba9c64e3)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-56_41283.jpg?sign=1739030030-U65fC4KWDyE3TprKkRhIC7ubluFvVln6-0-8c4861abf011a66dfe7d84d2fb4b0986)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-57_41286.jpg?sign=1739030030-yTay9a4QDtIY6baB2wrVLuT5UVplktgq-0-84bfaa5c1a33c7b47a74b6cba7f3fb0d)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-58_41389.jpg?sign=1739030030-iNenS0mm45kqychmBTkrtw6t5d6pr6qF-0-89f1315ec79caa984fd9471b1413beb7)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-59_41392.jpg?sign=1739030030-F9EYoF0axpfPkqtZkFwjTBULyi2s1ELF-0-7a9682726b432758634194b6daa30c56)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-60_41395.jpg?sign=1739030030-XFh9FP5LjhAyTXIPXdwLdwNFdYTbSsPF-0-0b6de4ca00195516f6331f333635e820)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-61_41500.jpg?sign=1739030030-AXQu8A78lWizP9BVypzipNFIoHnati0F-0-2914b4d94000a4375599f087e709543f)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-62_41503.jpg?sign=1739030030-sCBi4XCtpdMCofuOPPjb1Cxs1xFheoOX-0-c21ab43829ae7cd46b55b235fec58a98)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P70_0607_41508.jpg?sign=1739030030-XinAPQAvTu17ATBUWZOkbAdl1LsUtdYV-0-e09cdb904aa7996d31dffb49f6d98c83)
【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=1739030030-VXC02xZO8IO1ChXLylVyoEKS42mlI8fp-0-800e26e338560fe10b10def94536f545)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P71_0612_41616.jpg?sign=1739030030-OE1p9k3ZjalDDz6I80Y7xIGzYz7VMI6W-0-1ac9b161451e2bc4101923c6f55fd990)
![](https://epubservercos.yuewen.com/FC02CB/15859857604876206/epubprivate/OEBPS/Images/P3-64_41617.jpg?sign=1739030030-R3j3Hqd5z7QIV9yn8yeAHFGdLvbGSull-0-d66e89a2fbfdf2e4fa65cd8b79512d60)