立体视图镜在颞骨解剖中的应用研究

目的研究立体视图镜在颢骨解剖教学巾的应崩价值。方法对5个尸头标本进行颞骨解剖，对重要解剖结构拍摄具有一定视角差的图组，采用Adobe Photoshop 7．0罔片处理软件将其处理及合成为立体图片，由30名具有不同程度颞骨解剖知识的评估人员观察平面图和利用立体视图镜观察立体图并进行比较。结果制作的55张立体解剖图片均能产生清晰的立体视觉，在对平面罔解剖结构的层次关系判断上本专业高、低年资医生及非本专业成员的准确和较准确级别分别达到100％、60％、25％，在对立体图的层次关系判断上均达到100％。结论将立体视图镜运用于颞骨解剖有利于提高人们对颞骨细微解剖结构层次关系的认知度．是一种简便、有效地学习和掌握颞骨解剖知识的方法。     

Pilot study comparing the influence of different types of exercise intervention on the fear of falling in older adults

Background: Individuals who fear falling may restrict themselves from performing certain activities and may increase their risk of falling. Such fear, reflected in the form of falls efficacy, has been measured in only a small number of studies measuring the effectiveness of exercise interventions in the elderly. This may be due to the various types of exercise that can be performed. Hence the effectiveness of exercise on falls efficacy is relatively understudied. Therefore, there is a need to measure falls efficacy as an outcome variable when conducting exercise interventions in the elderly. Methods: A total of 43 elderly community‐dwelling volunteers were recruited and randomly allocated to a conventional exercise intervention, a holistic exercise intervention, or a control group. The interventions were performed 2 days per week for 10 weeks. Falls efficacy was measured at baseline and at the completion of the interventions using the Modified Falls Efficacy Scale (MFES). Results: Within group comparisons between baseline and follow‐up indicated no significant improvements in falls efficacy, however, the difference for the conventional exercise group approached statistical significance (baseline 8.9 to follow‐up 9.3; P = 0.058). Within group comparisons of mean difference MFES scores showed a significant difference between the conventional exercise group and the control group (conventional exercise group 0.4 vs control group ?0.6; P < 0.05). Conclusion: Given the lack of significant improvements in falls efficacy found for any of the groups, it cannot be concluded whether a conventional or a holistic exercise intervention is the best approach for improving falls efficacy. It is possible that the characteristics of the exercise interventions including specificity, intensity, frequency and duration need to be manipulated if the purpose is to bring about improvements in falls efficacy.     

整体护理实施糖尿病患者自选护士的研究

目的 探讨糖尿病患者自选护士的效果。方法 将住院的糖尿病患者80例,按时间段分为两组,对照组常规整体护理,观察组患者自选护士,出院前调查护理满意度,所获数据经X~2检验。结果 两组患者满意率P<0.01,有显著性差异。结论 患者自选护士可明显增加患者的满意率,为竞争上岗和评先树优找到了公平公正的客观依据。     

The phenomenology of death, embodiment and organ transplantation

Abstract Organ transplantation is an innovative 21^st century medical therapy that offers the potential to enhance and save life. In order to do so it depends on a supply of organs, usually from cadaveric donors who have suffered brain stem death. Regardless of whether and how the deceased recorded their wishes about donation, health professionals will approach the bereaved relatives, before organs are removed. In this article, the results from 19 semi‐structured interviews with Scottish donor families will be presented. These accounts will focus exclusively on the families’ beliefs about death, the dead body and bonds with the deceased, and whether these affected the donation decision or the organs donated. What the families said about brain stem death (BSD); how and when they understood that death had occurred; and whether the families thought that death caused a ‘disembodiment’ (that the self was no longer embodied) will be explored. Finally, attention will turn to the bereaved's previous relationship with the embodied person. I conclude that the phenomenology of embodiment, death and organ transplantation offers new answers to the question of ‘Who am I’? That is, in order to understand what identity is, one might look for what it is that is lost at death; the body, the self and relationships with others.     

A radiographic view of the scaphotrapezium-trapezoid joint

Traditionally the scaphotrapezium-trapezoid joint is imaged through a posteroanterior view of the wrist. We describe an x-ray view that is aimed directly at the joint, which gives better visualization than the standard views.     

Single high dose intraoperative electrons for advanced stage pancreatic cancer: phase I pilot study

Phase I toxicity studies with intraoperative radiotherapy proved to be a feasible adjunct to surgery for unresectable malignancies of the pancreas at Howard University Hospital. There have been minimal side effects or complications related to the combination of limited surgical decompression and intraoperative radiotherapy alone. The procedure has now become a standard operation for the surgical radiotherapeutic team as well as the other support members, including anesthesiology, nursing and housekeeping. The toxic effects of intraoperative radiotherapy on normal tissues is being assessed on a dose volume basis. Doses of 2000–2500 rad in a single exposure to include the pancreas, regional nodes and duodenum are acceptable if the total treatment volume is less than or equal to 100 cm³ The tumoricidal effects on the cancer are demonstratable when one reviews the pathological specimens that illustrate massive tumor necrosis and fibros replacement, but in all cases reviewed, viable cancer was noted. Intraoperative radiotherapy, therefore, represents a significant “boost” dose for resectable, partially resectable or non-resectable tumors when added to conventional external beam irradiation and/or chemotherapy. Preliminary clinical data and minimal toxicity justifies further investigation.     

Magnetic resonance imaging in neonatal encephalopathy

Magnetic resonance imaging may provide invaluable information in the term born neonate with encephalopathy. However, both hardware and sequences may need adaptation from normal adult protocols. Sedation is often required to obtain good quality imaging, but anaesthesia is not necessary in this population. The perinatal history may predict the pattern of brain lesions, which, in turn, may be used to predict the neurodevelopmental outcome. Image interpretation is not easy and requires a full clinical history in addition to experience of both normal and abnormal neonatal brain appearances. Lesions evolve rapidly, and perinatally acquired leasions are at the most obvious 1-2 weeks from delivery. Early imaging in the first few days from presentation should always include diffusion-weighted sequences to identify early ischaemic change. Advanced techniques such as venography, angiography and perfusion-weighted imaging may be useful in certain situations, and serial imaging may help differentiate perinatal-acquired lesions from other pathologies.     

Aberrant right subclavian artery as a new cardiac sign in second- and third-trimester fetuses with Down syndrome

OBJECTIVE: The right subclavian artery arises normally as the first vessel from the brachiocephalic artery of the aortic arch. An aberrant right subclavian artery arises as a separate vessel from the aortic isthmus and crosses to the right, behind the trachea. This variant is present in <1% of the normal population; however, in subjects with Down syndrome, an incidence between 19% and 36% was reported. The purpose of this study was to assess the possibility of the detection of an aberrant right subclavian artery in fetuses with Down syndrome. STUDY DESIGN: Fourteen consecutive fetuses with prenatally detected Down syndrome were examined between 18 and 33 weeks of gestation. The presence of an aberrant right subclavian artery was determined by visualization of the transverse 3-vessel trachea view of the upper thorax with color Doppler ultrasonography. RESULTS: The right subclavian artery was visualized in 100% of fetuses (14/14) with Down syndrome. An aberrant right subclavian artery was identified in 35.7% of trisomy 21 fetuses (5/14). In 1 fetus, the aberrant right subclavian artery was the only abnormal ultrasound finding. In 3 fetuses, an aberrant right subclavian artery was associated with an intracardiac echogenic focus plus additional extracardiac markers. In the fourth fetus, an aberrant right subclavian artery was associated with an atrioventricular septal defect. All 9 fetuses with Down syndrome with a normal origin of the right subclavian artery had additional cardiac and/or extracardiac abnormalities. In 12 cases, pregnancy was terminated; 2 fetuses were live born. CONCLUSION: This preliminary study suggests that the in utero identification of an aberrant right subclavian artery may be a new ultrasound marker to be found in fetuses with Down syndrome. Further studies are required to assess the incidence of aberrant right subclavian artery in normal fetuses.     

Flow compensation in balanced SSFP sequences.

In balanced steady-state free precession (b-SSFP) sequences, uncompensated first-order moments of encoding gradients induce a nonconstant phase evolution for moving spins within the excitation train, resulting in signal loss and image artifacts. To restore these flow-related phase perturbations, "pairing" of consecutive phase-encoding (PE) steps is compared with a fully flow-compensated sequence using compensating gradient waveforms along all three encoding directions. In volunteer studies, the quality of images acquired with the "pairing" technique was comparable to that of images obtained with the fully flow-compensated technique, regardless of the selected view-ordering scheme used for data acquisition. Nevertheless, the results of phantom experiments indicate that the pairing technique becomes ineffective at flow velocities exceeding roughly 0.5-1 m/s. Consequently, the additional scan time required to null the first gradient moments in a flow-compensated b-SSFP sequence makes the "pairing" technique preferable for applications in which slow to moderate flow velocities can be expected.