宫颈环形电切术对阴道镜活检诊断为宫颈上皮内瘤变的再评估

目的通过宫颈环形电切术(LEEP)对阴道镜活检诊断为宫颈上皮内瘤变(C IN)的准确性和全面性进行评估。方法对118例阴道镜活检诊断为C IN的患者行LEEP,对比术前术后的病理结果。结果32例阴道镜活检病理为C INⅠ级病例中有11例与LEEP术病理相符,6例LEEP术后病理级别上升,15例LEEP术后病理级别下降;26例阴道镜活检病理C INⅡ级病例中有17例LEEP术后病理示相符,5例LEEP术后病理级别上升,4例LEEP术后病理级别下降;60例阴道镜活检病理为C INⅢ级病例中有44例LEEP术后病理示相符,11例LEEP术后病理级别上升,5例术后病理级别下降。结论LEEP术是明确诊断和治疗C IN的有效而理想的方法,阴道镜活检有一定局限性。     

狗喉上神经袢神经束性质的鉴别

用成年杂种狗１２只，在全麻状态下放血，取其颈交感干与喉上神经外支间的交通支及其与喉上神经外支汇合后的神经干，甲醛固定，明胶包埋，恒冷切片后用Ｋａｒｎｏｖｓｋｙ乙酰胆碱酯酶组化方法，对上述材料进行观察。我们发现交通支多为无髓纤维，酶反应呈强阳；混合后的神经含有髓酶反应阳性和阴性纤维及无髓酶反应强阳性纤维，证实喉上神经袢含有体躯运动、内脏运动（交感神经）纤维及感觉纤维。因此，喉上神经拌为混合神经。     

The early phase of experimental acute renal failure

Experiments were conducted to establish whether diminished solute reabsorption in the loop of Henle during acute renal failure could explain the loss of urinary concentration and participate in generating a tubuloglomerular feedback-mediated reduction in filtration rate. The electrolyte content of the fluid in the ascending limb of the loop of Henle was determined in situ by monitoring its electrical conductivity after propulsion into the distal tubule with a sudden burst perfusion. The value of the minimum electrolyte concentration decreased exponentially with increasing equilibration time, reaching a steady-state value equivalent to 27±9 mM NaCl in normal kidneys, 34±15 mM in mercuric chloride kidneys and 53±22 mM following ischaemia. A mathematical model was derived to describe the process of sodium chloride dilution from which it was possible to calculate both the permeability and transport velocity of the cortical thick ascending limb. In the normal kidney, the transport velocity was calculated to be 4.65±0.92 ·10^–5 cm/s, a value not significantly different from that of the mercuric chloride or ischaemic kidneys, and the estimated permeability was 1.13±0.52·10^–5 cm/s, not different from that of the mercuric chloride kidneys but significantly lower than that calculated for the ischaemic kidneys. It is concluded that for the more severely damaged ischaemic model, the loss of urinary concentrating ability was accompanied by a reduction in diluting ability of the ascending limb of the short loop of Henle, which appears to be due, at least in part, to an elevation of the passive permeability to sodium chloride in this segment.     

Isolated perfused rabbit colon crypts: stimulation of Cl− secretion by forskolin

The aim of this study was to characterize ion conductances and carrier mechanisms of isolated in vitro perfused rabbit colonic crypts. Crypts were isolated from rabbit colon mucosa and mounted on a pipette system which allowed controlled perfusion of the lumen. In non-stimulated conditions basolateral membrane voltage (V _b1) was –65±1 mV (n=240). Bath Ba²⁺ (1 mmol/ l) and verapamil (0.1 mmol/l) depolarized V _b1 by 21±2 mV (n=7) and 31±1 (n=4), respectively. Lowering of bath Cl^– concentration hyperpolarized V _b1 from –69±3 to –75±3 mV (n=9). Lowering of luminal Cl^– concentration did not change V _b1. Basolateral application of loop diuretics (furosemide, piretanide, bumetanide) had no influence on V _b1 in non-stimulated crypts. Forskolin (10^–6 mol/l) in the bath depolarized V _b1 by 29±2 mV (n=54) and decreased luminal membrane resistance. In one-third of the experiments a spontaneous partial repolarization of V _b1 was seen in the presence of forskolin. During forskolin-induced depolarization basolateral application of loop diuretics hyperpolarized V _b1 significantly and concentration dependently with a potency sequence of bumetanide > piretanide furosemide. Lowering bath Cl^– concentration hyperpolarized V _b1. Lowering of luminal Cl^– concentration from 120 to 32 mmol/l during forskolin-induced depolarization led to a further depolarization of V_b1 by 7±2 mV (n=10). We conclude that V_b1 of rabbit colonic crypt cells is dominated by a K⁺ conductance. Stimulation of the cells by forskolin opens a luminal Cl^– conductance. Basolateral uptake of Cl^– occurs via a basolateral Na⁺ : 2Cl^– : K⁺ cotransport system.     

宫颈环形电刀切除术治疗212例宫颈上皮内瘤变价值探讨

目的:探讨宫颈环形电刀切除术(LEEP)治疗宫颈上皮内瘤变(CIN)的价值。方法:回顾分析2000年3月至2004年10月212例CIN患者在阴道镜辅助下行宫颈环形电切术的治疗情况。结果:阴道镜下宫颈异常结构处取活检病理结果为CIN者212例行宫颈环形电切术(LEEP),LEEP术后病理检查:宫颈粘膜慢性炎症13例(6.1%)、CINⅠ90例(42.5%)、CINⅡ77例(36.3%)、CINⅢ24例(11.3%),原位癌累及腺体伴早期浸润癌8例(3.8%)。术后195例(92.0%)宫颈标本边缘病理学检查未见CIN病变;术后降级者70例(33.0%),等级者122例(57.5%),升级者20例(9.4%);治愈率达89.2%。结论:LEEP治疗CIN安全有效、简单易行、并发症少、避免了二次手术和过度治疗,能保留患者的生育能力,在治疗的同时能进行诊断。但术后仍需定期和规范的随访以防止宫颈癌的发生和发展。     

The oncological and obstetric outcomes of cervical squamous cell carcinoma at stage IA1 managed with the loop electrosurgical excision procedure

ObjectiveTo evaluate the efficacy and superiority of loop electrosurgical excision procedure (LEEP) in managing stage IA1 cervical microinvasive squamous cell carcinoma (MISCC) without lymph-vascular space invasion (LVSI).Materials and methodsThe oncological and reproductive outcomes of a series of patients affected by stage IA1 MISCC without LVSI, initially treated by LEEP between February 2006 and December 2017, were retrospectively reviewed.ResultsUltimately, 109 patients were included. The mean age at diagnosis was 35.4 years old, and 36 patients were nulliparous. Multifocal lesions were identified in 15 patients (13.8%). The mean cone depth was 17.4 mm. Resection margins were positive/unevaluable and negative in 26 (23.9%) and 83 (76.1%) cases, respectively. Among cases undergoing salvage treatments, the residual disease rate for patients with positive/unevaluable margins was significantly higher than those with negative margins (P = 0.003). During the follow-up period of 43.0 ± 28.9 months, no relapse was identified. Fifteen of 20 patients (75.0%) conceived successfully, with a full-term live birth rate of 93.3%.ConclusionsFor stage IA1 MISCC without LVSI unexpectedly found in a loop excision, initial LEEP with clear margin is efficient and adequate. For cases with multifocal MISCC, or for those young patients who wish to become pregnant in the future, LEEP is the optimal choice.     

Loop Ileostomy Closure at an Ambulatory Surgery Facility

INTRODUCTION: Temporary loop ileostomies have become widely used in colorectal surgery. Subsequent ileostomy closure has traditionally required hospital admission with observation until return of bowel function. On the basis of clinical observation, the authors hypothesized that loop ileostomy closure may be performed safely without prolonged in-hospital observation. METHODS: A protocol for 23-hour observation after loop ileostomy closure was implemented at a single institution and applied to 28 patients at an ambulatory surgery facility. Patient outcomes were reviewed and results compared with a cohort of 30 patients undergoing loop ileostomy closure before introduction of the protocol. RESULTS: The study and control groups were statistically similar in age, gender, diseases, and duration after original operation. Twenty-eight patients underwent loop ileostomy closure, and all were discharged the following day. Two patients were admitted for nausea and vomiting within 48 hours after closure and remained in the hospital for two and four days, respectively. One of these patients was readmitted 12 days after surgery with an abdominal abscess that was drained percutaneously. The mean cost per patient in the study group was $2,665. For the control population, the mean hospital stay was 2.9 days. Return of bowel function was delayed in two patients, resulting in prolonged hospital stays of six and eight days, respectively. Two patients were readmitted after discharge for nausea and vomiting. The mean cost per cohort patient was $3,811. CONCLUSIONS: Patients undergoing loop ileostomy closure may be discharged safely after overnight observation without increased complications or hospital readmissions. This practice significantly reduces the use of hospital resources and decreases economic cost without compromising care.     

Use of Intracolonic Bypass Secured by a Biodegradable Anastomotic Ring to Protect the Low Rectal Anastomosis

Purpose Because of the relatively high morbidity and mortality of anastomotic leakage in patients with low rectal cancer who receive an anterior resection, many fecal diverting methods have been introduced. This study was designed to assess the efficacy and safety of the Valtrac™-secured intracolonic bypass in protecting low rectal anastomosis and to compare the efficacy and complications of Valtrac™-secured intracolonic bypass with those of loop ileostomy. Methods From January 2002 to April 2006, 83 patients with rectal cancer who underwent elective low anterior resection received intracolonic bypass or ileostomy. Demographics, clinical features, and operative data were recorded. Results Forty-four patients (53 percent) received a Valtrac™-secured intracolonic bypass and 39 patients (47 percent) a loop ileostomy. The demographics and clinical features of the groups were similar. None of the patients developed clinical anastomotic leakage. Longer overall postoperative hospital stay (21.3 ± 5.8 days) and higher costs incurred (3.1 ± 0.9 × $1,000 U.S. dollars) were observed in the ileostomy group than in the intracolonic bypass group (12.5 ± 6.3 days, 4.4 ± 1.2 × $1,000 U.S. dollars; P < 0.05). Stoma-related complications in the ileostomy group included dermatitis (12.8 percent), bleeding (2.6 percent), and intestinal obstruction after stoma closure (5.1 percent). No complications were observed in the intracolonic bypass group except for the Valtrac™ ring discharging en bloc, which compromised fecal evacuation in two cases (4.5 percent). Conclusions The Valtrac™-secured intracolonic bypass procedure is a safe, effective, but time-limited, diverting technique to protect an elective low colorectal anastomosis. Valtrac™-secured intracolonic bypass, in contrast to loop ileostomy, avoids stoma-related complications or readmission for closure and is associated with decreased hospital time and cost. Presented at the First National Conference on Colorectal Surgery, Zhu Hai, Guang Dong, China, November 2 to 5, 2006. Reprints are not available.     

小剂量托伐普坦联合呋塞米治疗急性心力衰竭合并利尿剂抵抗超高龄老年患者临床评价

目的观察小剂量托伐普坦联合呋塞米在急性心力衰竭合并利尿剂抵抗超高龄老年患者中应用的疗效及安全性。方法选取自2013年1月至2015年6月在广州军区总医院干诊科住院的24例急性心力衰竭超高龄老年患者,平均年龄(94.16±7.03)岁。在维持长期治疗方案并强心、扩血管、改善肾灌注或(和)纠正低蛋白血症基础上,予呋塞米100~160 mg/d静脉泵注治疗5 d后,24 h尿量仍少于800 ml,在此治疗基础上加用托伐普坦7.5 mg/d口服7 d。观察记录患者每日的血压、心率、中心静脉压、尿量、心衰体征及不良事件。定期检查肝、肾功能,N末端B型脑钠肽前体(N-pro-BNP)及电解质,进行疗效及安全性评估。结果所有患者24 h尿量在治疗后48~72 h明显增加,治疗第3天尿量由(668.7±108.7)ml显著增加至(1 989.8±289.7)ml,差异有统计学意义(P<0.01)。治疗结束时,心衰症状明显改善,中心静脉压由(18.9±2.3)cm H2O显著下降至(12.6±1.3)cm H2O,差异有统计学意义(P<0.01);N-pro-BNP由(13 385.3±7 545.9)pg/ml显著下降至(4 995.4±2156.2)pg/ml,差异有统计学意义(P<0.01);血肌酐由(171.8±57.5)μmol/L显著下降至(121.7±48.8)μmol/L,差异有统计学意义(P<0.01);所有患者均未发生高钠血症,无明显口渴;1例患者出现肝损害。结论小剂量托伐普坦联合呋塞米能够显著增加急性心力衰竭合并利尿剂抵抗超高龄老年患者的尿量,有效纠正心力衰竭症状,对其的救治具有临床意义。