间置空肠贲门再造术在抗返流性食管炎上的应用

作者对１５例贲门癌患者行根治术同时，采用食管残胃间插入带蒂空肠并附加贲门再造术，通过ＳＰＥＣＴ胃食管返流指数测定、食管下端ｐＨ检测及返流症状评定方法，并与单纯食管胃套叠吻合术进行随机对比分析，证明该术式具有单向住屏障作用，能有效地预防返流性食管炎的发生。     

Focal reduction of villous blood flow in early indomethacin enteropathy: a dynamic vascular study in the rat

Background—Oral indomethacin causes villousshortening, microvascular damage, and distortion, which might inducemucosal ischaemia and necrosis.
Aims—In order to determine the early events inindomethacin induced jejunal injury we examined the temporal relationsbetween morphological damage and changes in villous blood flowfollowing indomethacin.
Methods—In anaesthetised rats, mid jejunal villiwere exteriorised in a chamber and observed by fluorescence microscopy.Blood flow in surface capillaries was calculated from velocities and diameters. Indomethacin was applied by both luminal and intravenous routes for 90 minutes, after which the animal was perfusion fixed andthe villi were processed for histological examination. Control animalsreceived intravenous or luminal bicarbonate (1.25%).
Results—Blood flow slowed in individual villi at20 minutes, and progressed to complete stasis (in another group) by 45 minutes. Histological examination at 20 minutes revealed microvascular distortion, but no villous shortening: crypt depth:villous height ratios were 0.356 (0.02) in test and 0.386 (0.01) in surrounding villi(p>0.5). At stasis, the villi under study showed epithelial clumpingand were shortened: crypt depth:villous height ratios were 0.92 (0.2)in test and 0.42 (0.06) in surrounding villi (p<0.02). Vehicle alonehad no effect on either blood flow or histology.
Conclusions—Focal slowing of villous blood flowand microvascular distortion precede villus shortening and epithelialdisruption, and indicate that damage to surface microvasculature is anearly event in indomethacin induced mucosal injury in this model.

Keywords:indomethacin; jejunum; villi; microcirculation; endothelium; microthrombi

     

Baroreflex control of jejunal blood flow and fluid transport in cats; effects of yohimbine,an α.-adrenergic antagonist

The aim of the study was to test the hypothesis that baroreceptor unloading increases jejunal fluid absorption rate via an α₂-adrenergic effect on electrogenic active transport. In 13 chloralose-anaesthetized cats, the carotid sinus baroreceptors were isolated and perfused with arterial blood, and we studied the effects of a graded decrease in carotid sinus pressure on intestinal vascular resistance, net fluid absorption rate and the potential difference between the intestinal lumen and the peritoneal cavity (PD). Experiments were performed in seven control animals and in six animals pretreated with yohimbine, an α₂-adrenergic antagonist, at a dose of 0.1 mg kg^-I i.v. Yohimbine per se had no significant effects on systemic arterial pressure, intestinal vascular resistance, net fluid absorption rate or PD. In the control animals, baroreceptor unloading induced an increase in systemic arterial pressure, intestinal vascular resistance and net fluid absorption rate, and a decrease in the PD. Yohimbine pretreatment did not significantly affect the systemic blood pressure response to baroreceptor unloading, but abolished the effect on intestinal vascular resistance and PD. After yohimbine treatment, decreases in carotid sinus pressure still enhanced net fluid absorption rate, but this response was observed in a higher range of carotid sinus pressures than in control animals. We conclude that (1) a major component of the increase in jejunal absorption rate during baroreceptor unloading is due to a non-electrogenic mechanism, which may be either active or passive; (2) this component of the response is not blocked by yohimbine at a dose sufficient for an effect on presynaptic α₂-receptors; (3) the absorptive response to baroreceptor unloading is not a phenomenon secondary to the concomitant jejunal vasoconstriction.     

Brunner's gland metaplasia of residual jejunum developed long after wide resection of the small intestine

We report a rare case in which mucous glands, similar to pyloric or Brunner's glands, developed in the residual jejunum (46 cm in length) long after wide resection of the small intestine. The mucous glands were observed in the mucosal and submucosal layers near the duodenum, and the mucin showed a positive reaction by paradoxical concanavalin A staining and immunoreactivity for HIK-1083, which were histochemically the same as those in the pyloric/Brunner's glands. This type of metaplasia in the small intestine without ulceration has not been described in the literature so far. It was speculated that these glands developed as a defense response or adaptation against relatively excessive acid due to the short small intestine.     

空回肠结肠多发性憩室的临床X线诊断

目的 探索空回肠结肠多发性憩室的临床X线表现,评价消化道造影的诊断价值。方法 对18例患者的临床及X线表现进行了回顾性分析。结果 空肠多发性憩室12例,其中并发十二指肠多发性憩室10例,2例合并回肠多发性憩室。结肠多发性憩室6例,1例并发回肠多发性憩室及结肠癌。结论 空肠多发性憩室多并发于十二指肠多发性憩室,近－中段是好发部位。结肠多发性憩室多见于右半结肠,可有结肠变形。未见独立发生的回肠多发性憩室。钡餐造影能够确诊,小肠灌钡及钡灌肛可提高发现率。     

异种(牛)脱细胞真皮基质-游离空肠复合体构建实验研究

目的 研究异种(牛)脱细胞真皮基质-游离空肠复合体的构建技术,以期解决游离空肠移植重建长段气管术后肠腺分泌的问题。 方法 选择10只杂种犬,制备去上皮游离空肠段,将剪成合适大小的异种(牛)脱细胞真皮基质覆盖于游离空肠基底膜表面,并用覆膜镍钛合金支架支撑固定,将构建好的复合体移至腹膜外与腹部皮肤之间,分别于术后7 d、14 d、1个月、3个月和6个月后取出,查看复合体的生长情况。 结果 10只实验犬中,有1只因肠粘连和伤口感染死亡而未能完成实验,余9只实验犬术后存活良好。术后7 d、14 d肉眼观察和病理检查,在游离空肠内表面均见有异种(牛)脱细胞真皮基质成分,表面黏膜层可见部分鳞状上皮化生;术后1个月、3个月、6个月肉眼和病理检查均未再发现异种(牛)脱细胞真皮基质成分,游离空肠内表面几乎全部化生为复层鳞状上皮。 结论 合适大小的异种(牛)脱细胞真皮基质覆盖在去上皮游离空肠内表面,可以促进游离空肠内表面的鳞状上皮化生,抑制肠腺分泌。覆膜镍钛记忆合金支架有一定的弹性,可以很好的对异种(牛)脱细胞真皮基质-去上皮游离空肠复合体起到支撑固定作用。     

姜黄素对小鼠离体空肠平滑肌舒缩活动的影响

目的探讨姜黄素对胃肠道蠕动是否有直接影响。方法取小鼠离体空肠平滑肌,放入37℃ Krebs液浴槽中,通入95％氧气和5％二氧化碳混合气体,进行如下实验：第一组小鼠空肠平滑肌,加入不同浓度的姜黄素,测量记录空肠平滑肌的自主收缩变化;第二组给予乙酰胆碱收缩平滑肌,然后加入姜黄素,观察姜黄素对平滑肌收缩的影响;第三组给予阿托品舒张平滑肌,然后加入姜黄素,观察姜黄素对平滑肌舒张的影响;第四组给予肾上腺素舒张平滑肌,然后加入姜黄素,观察姜黄素对平滑肌舒张的影响。统计学处理经SPSS19．0软件,所获数据用方差分析t检验。结果小鼠空肠平滑肌加入姜黄素后,平滑肌自主收缩明显下降（P〈0．01）,降低的幅度与姜黄素剂量呈现相关性;应用乙酰胆碱导致空肠收缩后,再加姜黄素,空肠平滑肌的收缩幅度也有明显的下降（P〈0．01）;给予阿托品导致小鼠平滑肌舒张后,再给予姜黄素,平滑肌收缩幅度进一步降低;给予肾上腺素引起小鼠平滑肌舒张后,再给予姜黄素孵育,平滑肌收缩幅度进一步降低。结论姜黄素对小鼠离体空肠平滑肌具有直接舒张作用。     

胃癌经腹全胃切除空肠代胃术的临床应用

为了评价胃癌经腹全胃切除空肠代胃术在外科中的应用价值,回顾分析31例胃癌患者行全胃切除空肠代胃术的临床资料。结果31例全胃切除的胃癌患者,术中无死亡病例,术后发生食管空肠吻合口瘘1例,肺部感染15例,切口感染4例,切口裂开2例,心衰3例,胸腔积液3例,返流性食管炎5例,均经积极治疗得到有效的改善。目前生存5年6例,生存3年17例。回顾性分析结果提示,全胃切除空肠代胃术为中晚期胃癌患者提供了一种较为有效的治疗方法,重建的消化道均能满足患者正常的营养需求,对改善术后生活质量及短期延长生命有积极作用。     

空回肠间质瘤13例诊治分析

目的　探讨空回肠间质瘤的诊断和治疗经验。方法　对我院 1993年 10月～ 2 0 0 4年 1月收治的有完整资料的 13例空回肠间质瘤病例进行回顾性分析 ,本组患者均经术后病理和免疫组化证实。结果　本组患者主要临床表现为消化道出血、腹痛。发病至确诊时间 2个月至 7年。剖腹探查确诊 7例 ,腹腔镜腹腔探查确诊 4例 ,术前确诊的仅 2例。随访 2个月至 9年 ,除 1例死于其它疾患外 ,余 12例均健在 ,无空回肠间质瘤复发病例发现。结论　小肠间质瘤预后甚好 ,但本病缺乏特征性的临床表现及有效的诊断手段 ,易致长期延误诊治 ;对长期不明原因的消化道出血患者 ,及早行剖腹探查或腹腔镜腹腔探查是避免小肠间质瘤长期延误诊治 ,改善患者预后的关键     

胆管空肠Roux-en-y吻合术后逆行性胆管感染的相关临床因素分析

目的：探讨胆管空肠Roux-en-y吻合术后逆行性胆管感染的相关临床因素。方法选择本院收治并实施胆管空肠Roux-en-y吻合术患者134例，分析糖尿病病史（有或无）、吻合口直径（≤2 cm或＞2 cm）、吻合方式（侧侧吻合、端侧吻合）、术前黄疸持续时间（≤7 d或＞7 d）、术前胆红素水平（≤171μmol/L或＞171μmol/L）、术中抗菌药物（有或无）对术后逆行性胆管感染的影响。结果合并糖尿病患者发生逆行性胆管感染发生率高于无糖尿病患者，差异有统计学意义（P＜0.05）；吻合口直径≤2 cm患者发生逆行性胆管感染发生率高于吻合口直径＞2 cm患者，差异有统计学意义（P＜0.05）；侧侧吻合患者的逆行性胆管感染发生率高于端侧吻合患者，差异有统计学意义（P＜0.05）。结论胆管空肠Roux-en-y吻合术后逆行性胆管感染与患者是否合并糖尿病、吻合口大小及吻合方式有关，值得临床借鉴。