小儿腹股沟嵌顿疝术式探讨

目的 探讨经腹横纹切口腹腔内行小儿腹股沟嵌顿疝还纳修补术的疗效。方法 自2000年以来我们共收治小儿腹股沟嵌顿疝36例，全部采用经腹横纹切口腹腔内还纳修补的方法，对本方法与传统治疗方法优缺点进行对比分析。结果 本方法无副损伤，无血肿与复发。结论 经腹横纹切口腹腔内行小儿腹股沟嵌顿疝还纳修补术是一种有效的方法，可推广应用。     

Colonic Drug Delivery: Enhanced Release of Indomethacin from Cross-Linked Chondroitin Matrix in Rat Cecal Content

Pharmaceutical Research -     

Manometric techniques for the evaluation of colonic motor activity: current status

Colonic motility disorders are common conditions. However, our understanding of normal, and, consequently, pathological motor function of the colon remains limited, mainly due to the relative inaccessibility of this organ for study. Investigation of colonic motility may encompass one or more of the four separate components (myoelectric activity, phasic and tonic contractile activity and movement of intraluminal content) using electrophysiological, manometric or transit studies. Although transit studies provide the best 'functional' appreciation of colonic motor activity, and are the only techniques used in contemporary clinical practice, manometric methods are becoming increasingly popular, as they allow a direct study of colonic contractile activity over prolonged periods. To date, the majority of studies have been limited to the pelvic colon by a retrograde (per rectal) approach; however, recent technological advances have facilitated 'pan-colonic' investigation. This review concentrates on manometry of the human colon proximal to the sigmoid, and includes evaluation of both phasic and tonic motor activity, by utilization of perfused-tube and solid-state manometric catheters, and also the electronic barostat. Methodological techniques, experimental protocols and the analysis and interpretation of recorded data are critically explored, and a contemporary classification of colonic contractile activities is presented.     

左半结直肠癌临床与病理学特点及诊治分析

目的　探讨左半结直肠癌 (LCRC)临床病理特点及诊治对策。方法　采用直接结肠镜检查加病理活检的方法确诊LCRC 85例 ,其中 37例经手术治疗。结果　本组 50岁以上占 60 %。农民占 73 %。首发症状至确诊 <3个月占 56 .5 % ,<1年占 89.4%。便血、腹痛腹胀、排便习惯改变、肛门异常是LCRC常见症状 ,便血为主要表现占 83 .5 % ,始发便血 56例 ,占 56/ 71 (76 .87% )。本组临床误诊率 63 .5 %。活检符合率 88.57%。病理形态以隆起 (肿块型 85 .88% )管状腺癌 (98.36 % )为主。 37例手术DUKES分期DaDb1 7例为可切除可治愈癌 ,占 45 .95 %。病程 <3个月DaDb 47.4% ,DcDd 52 .6 %。手术率乙状结肠以上癌 2 0 / 2 6(76 .92 % ) ,肛直肠癌 1 7/59(2 8.81 % )。结论　 >50岁属LCRC高发人群 ,为重点结肠镜检查对象。便血是LCRC始发主要表现和重要的结肠镜检查指征 ,应提高对便血的认识 ,放宽镜检范围。LCRC一经诊 ,应及早手术 ,这是切除或治愈LCRC的重要手段。     

食管癌切除结肠代食管术44例

我们于１９８９年３月至１９９３年８月间，为４４例食管癌病人行食管癌切除、结肠代食管术。包括上段癌２３例，中段癌１８例，下段癌３例；其中上段癌病变长于７ｃｍ者６例，中段癌病变长于８ｃｍ者５例及下段癌中２例既往曾行胃大部切除术且病变长于９ｃｍ者均先行术前放疗，放疗剂量为３０～４０Ｇｙ。４０例（９０．９％）以结肠左动脉升支供血的横结肠行顺蠕动方向吻合，结果手术死亡１例，颈部吻合口瘘９例（２０．４５％）。我们认为本术式对中、上段癌病人疗效较满意，建议多采用以结肠左动脉为血供的横结肠作为移植段行顺蠕动方向吻合，为减少术后并发症，应注意加强病人围手术期的处置和护理。     

Effects of epidural bupivacaine and epidural morphine on bowel function and pain after hysterectomy

A comparison was made of the effects of continuous epidural analgesia with bupivacaine and intermittent epidural morphine on bowel function after abdominal hysterectomy. The duration of postoperative ileus was assessed as the time from the end of operation to the first postoperative passage of flatus and feces. Twenty-two patients were randomly allocated to two equal groups. An "epidural morphine" group received general anesthesia and epidural morphine for postoperative pain relief, and an "epidural bupivacaine" group was given combined general anesthesia and epidural anesthesia with 0.5% bupivacaine intraoperatively and epidural analgesia with 0.25% bupivacaine postoperatively. Epidural morphine or bupivacaine was given for 42 h postoperatively. Pain intensity (visual analog scale) was low in both groups, but lower (P less than 0.05) in the epidural bupivacaine group. The time to first passage of flatus was 22 +/- 16 h in the epidural bupivacaine group and 56 +/- 22 h in the epidural morphine group (P less than 0.001). The time to first postoperative passage of feces was shorter (P less than 0.05) in the former than in the latter 57 +/- 44 h vs 92 +/- 22 h). The patients of the epidural bupivacaine group started intake of oral fluids earlier (P less than 0.01) and to a greater extent (P less than 0.05) than those in the epidural morphine group. It is concluded that the duration of postoperative ileus after hysterectomy is shorter when epidural bupivacaine is given for postoperative pain relief than when this is achieved by epidural morphine.     

Schedule-dependency of in vivo modulation of 5-fluorouracil by leucovorin and uridine in murine colon carcinoma

Summary The effect of leucovorin (LV) given in various doses and schedules on the in vivo antitumor activity and toxicity of 5-fluorouracil (5FU) was studied in two murine colon cancer lines, i.e., Colon 26 (relatively resistant to 5FU) and Colon 38 (5FU sensitive), maintained in Balb-c and C57B1/6 mice, respectively. Mice were treated weekly with 5FU at the maximum tolerated dose, alone and in combination with LV. In Colon 26, neither simultaneous administration of 5FU and LV nor 5FU combined with delayed administration of LV potentiated the antitumor activity of 5FU. LV given twice — 1 hr before (50 mg/kg) and then together (50 mg/kg) with 5FU (100 mg/kg) — gave significantly better delay of tumor growth of both tumor lines than 5FU did alone (100 mg/kg). No differences were found after a total LV dose of 100 or 200 mg/kg. Delayed administration of uridine (3500 mg/kg) allowed the use of higher 5FU doses, which improved the antitumor effect on Colon 26. Systemic toxicity led to moderate weight loss in treated mice, but was comparable for mice treated with 5FU alone or combined with LV. Hematological toxicity consisted of moderate leukopenia (nadir 40%), which was observed with the most active schedule and was less severe than with 5FU alone. This schedule did not cause thrombocytopenia, but after discontinuation the thrombocyte count showed an overshoot. Addition of uridine to this schedule reduced hematological toxicity only slightly. It is concluded that LV potentiated the antitumor activity of 5FU against two solid tumor lines, i.e., a relatively resistant and a sensitive murine colon carcinoma, and that toxicity was moderate.Abbreviations 5FU 5-fluorouracil - LV leucovorin (folinic acid, 5-formyl-tetrahydrofolate) - FdUMP 5-fluoro 2-deoxyuridine 5monophosphate - TS thymidylate synthase - CH2-THF 5-10 methylenetetrahydrofolate - UR uridine - GDF growth delay factor - TD tumor doubling time - MTD maximum tolerated dose - T/C mean tumor volume of treated mice divided by mean tumor volume of control mice     

Ultrastructure of early phase hepatic metastasis of human colon carcinoma cells with special reference to desmosomal junctions with hepatocytes

To demonstrate ultrastructural events in the early phase of hepatic metastasis of human colon carcinoma, we intrasplenically injected a highly metastasizable, human colon carcinoma cell line LM-H3 (1 x 10(6) cells) into nude mice, and electron microscopically investigated the hepatic metastasis. At 24 h, tumor cells adhered to the endothelial wall of terminal portal venules and periportal sinusoids. At 48-72 h, after extravasation, they deeply invaded the hepatic cell plate and the interstitial tissue of the portal tract, in which they underwent proliferation and made the metastatic foci. Tumor cells were linked with each other or with surrounding hepatocytes by desmosomes. Desmosomes were maintained during the mitosis. When invading tumor cells were exposed to the bile canaliculi, they generated microvilli on the surface. Microvilli were also formed at the luminal surface of intracytoplasmic inclusions. In the interstitial tissue of the portal tract, tumor cells were closely associated with fibroblasts. However, no junctional specializations were seen between them. The present study demonstrated that human colon carcinoma cell line LM-H3 formed desmosomes with hepatocytes soon after invasion of the hepatic cell plate, suggesting the regulatory role of an interaction with hepatocytes in the growth of metastatic foci within the liver parenchyma.