经口内镜下肌切开术在儿童贲门失弛缓症中的应用

目的探讨经口内镜下肌切开术(POEM)治疗儿童贲门失弛缓症(AC)的临床疗效及并发症发生情况。方法回顾性分析该院2012年11月-2016年11月确诊AC并接受POEM治疗的17例患儿的临床表现、POEM手术过程及术后随访情况。结果 17例患儿均成功完成POEM,无严重并发症发生,手术时间(62.65±35.54)min;17例患儿术后随访12~36个月,手术前后AC临床症状评分(Eckardt评分)分别为5(4.0-6.0)和0(0.0-1.0)分,差异有统计学意义(P=0.000),临床症状明显缓解,体重减轻情况明显改善。结论 POEM治疗儿童AC安全性高,短期疗效确切,长期疗效及远期并发症有待大样本量的随访监测。     

Puncture of veins and arteries assisted by ultrasound

The localisation of arteries or veins is facilitated by the use of an ultrasonic Doppler unit.* When a beam emitted by a detector transducer impinges on a blood vessel, an audible “flow” signal characteristic for an artery or a vein is produced. Since both the localisation of the blood vessel and the direction of puncture can be established with this unit, the method proves to be particularly useful in the search for vessels difficult to locate such as the subclavian vein. In 48 out of 50 cases the ultrasound assisted puncture of the subclavian vein and the placement of a venous catheter were successful. Such dangerous complications as haemorrhages and pneumothorax did not develop. The possibility of ultrasonic blood vessel localisation suggests itself also for the puncture of other veins and arteries provided they are not deeper than 4 cm below the skin.     

Comparison of the mechanical performance of three types of external fixators: linear, circular and hybrid

Different configurations of the Monticelli-Spinelli and Ilizarov external fixation systems were tested to define their mechanical properties. In five configurations the external fixator consisted of rings with tensioned wires (circular), while in one configuration two pairs of the tensioned wires and their correspondent ring were replaced by threaded pins (hybrid). Testing was performed in axial compression, bending and torsion. The results were compared to the characteristics of a selected linear fixator group. Both the circular and the hybrid configurations were non-linear in compression. In bending, circular fixators had a similar pattern in both anteroposterior and oblique loading directions. The bending load-displacement pattern for the hybrid fixators was similar to the linear fixators, higher stiffness in the plane of the pins. Torsion was linear for both circular and hybrid fixators, as for the linear fixators. By combination of wires and pins (hybrid configuration), the mechanical behaviour had characteristics from both linear and circular fixators. It is concluded that the three studied groups own different mechanical performance and can be considered as different types of fixators. While it has been demonstrated that osteogenesis can be achieved independently of the mechanical behaviour of the fixator, this study supports the suggestion that some complications can be related to the mechanical behaviour of the fixator.     

全覆膜金属可回收支架在治疗食管顽固性良性狭窄中的应用价值

目的探讨全覆膜金属可回收支架治疗食管顽固性良性狭窄的安全性及疗效。方法回顾性分析行全覆膜金属可回收支架治疗的33例食管顽固性良性狭窄患者的临床资料,评价治疗的可行性、安全性及疗效。结果 33例患者共计放置可回收支架41支,其中8例患者行二次可回收支架置入,术后均有不同程度胸痛及异物感;术后并发支架移位11例(共计14支),移位发生率34.1%(14/41);其余22例患者(共计27支支架)均于术后4~8周顺利回收。术中及术后无明显出血、穿孔等并发症发生,无支架相关死亡病例。所有患者定期参加随访(12个月),其中12例成功解除梗阻,临床缓解率为36.4%(12/33)。结论全覆膜金属可回收支架用于治疗食管顽固性良性狭窄是安全可靠的,可使部分患者成功解除梗阻,但支架移位发生率高,有待于临床进一步研究解决。     

Lymphoproliferative response to synthetic V3 loop P18 peptide and HIV-1 envelope glycoprotein among individuals immunized with gp160 candidate vaccines

Because T-cell responses are critical for defense against viral infections, the synthetic P18 peptide (RIQRGPGRAFVTIGK) and active component of gp160 protein has previously been shown to induce cytotoxic and helper T-lymphocyte responses. In order to further define the T-helper cells, responses which are known to play a role in enhancing the immunological response to foreign antigen, we studied the response of individuals immunized with HIV gp160 candidate vaccines. We investigated the proliferative cellular response of peripheral blood mononuclear cells (PBMC) derived from individuals immunized with gp160 antigens in three different protocols. We found a PBMC proliferative response to synthetic P18 peptide in healthy immunized individuals induced by gp160 antigen with or without vaccinia virus. There was correlation between the proliferative response to P18 peptide and other antigens such as HIV-like proteins and gp160 molecule. HLA-DR typing revealed the possible presentation of P18 peptide by several different class II molecules. Since these class II molecules occur frequently in the general population, P18 peptide appears to contain broadly reactive epitopes and thus is presented by mutiple HLA class II molecules. Due to its broad reactivity P18 peptide is one of the candidates for inclusion as a subunit vaccine against HIV-1.     

N0tchl、N0tch2表达与移行细胞肿瘤恶变及发展关系的研究

目的研究Notch通路相关基因蛋白Notchl、Notch2在移行细胞肿瘤恶变中的作用。方法利用免疫组化SP法对比检测Notchl、Notch2在移行上皮乳头状瘤、具有恶性潜能的乳头状瘤、低级别尿路上皮癌、高级别尿路上皮癌各30例中的表达,并与其临床病理参数进行对比研究。结果各个级别肿瘤中均存在Notchl、Notch2的表达;Notchl在移行上皮乳头状瘤、具有恶性潜能的乳头状瘤、低级别尿路上皮癌、高级别尿路上皮癌中的阳性表达率呈现下降趋势,其阳性表达率随病变级别升高而明显降低;其表达水平与病变程度间存在明显负相关（r=-0．6791,P=0．0021）。Notch2在移行上皮乳头状瘤、具有恶性潜能的乳头状瘤、低级别尿路上皮癌、高级别尿路上皮癌中的阳性表达率呈现上升趋势,其阳性表达率随病变级别升高而明显增加;其表达水平与病变程度间存在明显正相关（r=0．6612,P=0．0001）。Notchl在尿路上皮癌中表达水平与组织学类型、浸润深度、淋巴结转移密切负相关（P〈O．05）,与肿瘤体积、TNM分期无关（P〉O．05）;Notch2表达水平与肿瘤体积、组织学类型密切相关（P〈O．05）,与淋巴结转移、TNM分期、浸润深度无关（P〉O．05）。Notchl和Notch2在移行细胞肿瘤不同病变中的表达水平的相关性分析显示：两者表达存在明显负相关（r=-0．6608,P〈0．05）。结论Notchl、Notch2介导的上皮间质转换参与移行细胞肿瘤恶变,同时两者在移行上皮癌变中发挥协同作用,与肿瘤发展密切相关。     

Delirium in patients admitted to a step-down unit: Analysis of incidence and risk factors

Background

Delirium is a rather common complication among patients admitted in intensive care units (ICUs), and rather than a single entity, it can be considered a spectrum of diseases where, besides overt cases, there are also many subsyndromal forms. Although there are many data about ICU delirium, there are few data concerning this complication in patients transferred from the ICU to a step-down unit (SDU) once clinically stable.

Objectives

With the present study, we wanted to assess the incidence of and risk factors for delirium and subsyndromal forms and their impact on clinical outcome in a group of patients transferred from an ICU to an SDU.

Methods

All patients transferred from an ICU to our SDU over a 2-year period were screened for delirium and subsyndromal delirious forms using the Intensive Care Delirium Screening Checklist, a simple tool already validated in the ICU. The following data were also recorded: demographic data, severity score (SAPS II), reason for admission to the SDU, length of stay, death rate, use of sedatives, impact of delirium on weaning from mechanical ventilation (MV).

Results

Among the 234 patients, the incidence of delirium and subsyndromal forms was 7.6% and 20%, respectively. Subsyndromal forms diagnosed at admission represented a risk factor for the subsequent development of delirium (odds ratio [OR], P < .0001). A previous episode of brain failure during ICU stay and older age were risks factors for the development of subsyndromal forms, whereas not needing MV was a protective factor. Delirium significantly prolonged the stay in the SDU but did not influence survival and the process of weaning from MV. Overall, the percentage of patients with an abnormal Intensive Care Delirium Screening Checklist score at discharge (5%) was reduced compared with that recorded at admission (18%).

Conclusions

Delirium may still occur after discharge from an ICU in patients who are transferred to an SDU. The strategy of care adopted in the SDU seems to positively affect the recovery from a delirious state. Patients with subsyndromal forms should be promptly recognized and treated because of the risk of developing delirium. Weaning from MV is not hindered by delirium.     

Acute pericarditis

There are many causes of acute pericarditis (inflammation of the pericardium) and diagnosis is often difficult owing to the dynamic nature of the disease. History and physical examination, augmented by radiographic and ECG studies, will allow the diagnosis to be made in the majority of cases. The ECG typically undergoes a four-stage evolution, and frequent reassessment of the patient is essential. Outpatient treatment is usually successful, although a subgroup of these patients require hospitalization.     

Évaluation médico-économique du baclofène intrathécal chez les patients présentant une spasticité chronique sévère

A medicoeconomic evaluation of continuous intrathecal baclofen (Lioresal^®) infusion for symptomatic treatment of severe spinal spasticity was realised using a monocentric, comparative, retrospective approach where subjects were their own controls (n = 22). Study results confirm the efficacy of baclofen on symptoms, functional status of patients and on a non specific quality of life scale. Conversely, use of baclofen lead to a 67% increase of average annual costs of care for these patients and reaches around 173,500 French francs (~29,000 US$)/year. Such a cost seems to be acceptable with respect to clinical benefits. © 1998 Elsevier, Paris     

实时三维超声心动图容积-时间曲线测定冠心病患者左室峰值排空率的价值

目的探讨实时三维超声心动图（TR-3DE）容积-时间曲线（VTC）测定冠心病患者左室峰值排空率（PER）的应用价值。方法应用TR-3DE的左室VTC测量34例冠心病患者和34例正常人的PER,并进行比较;分析冠心病患者左室PER与射血分数（EF）的相关性。结果冠心病患者的PER明显小于正常对照组（P〈O．001）．与EF呈显著正相关（r=0．875）。结论TR-3DE VTC可以准确测量左室PER。能反映冠心病患者左室整体收缩功能状况。