Back pain and leg complaints that revealed non–small cell carcinoma: a case study

Objective

The purpose of this case study is to describe the clinical presentation of a patient with a chief complaint of low back and leg pain with no prior diagnosis of lung cancer.

Clinical Features

A 48-year-old man with a history of back pain presented to a chiropractic office with a complaint of low back and left leg pain.

Intervention and Outcome

Abnormal examination and radiographic findings were discovered. The patient was immediately referred to the pulmonologist for co-management. Through the use of advanced imaging and biopsy, stage 4 lung cancer was diagnosed.

Conclusion

Low back pain recurrence in an established patient should constitute a reevaluation of the problem. The cause cannot be assumed to be musculoskeletal in origin even though this may have been the case with the initial complaint. Metastatic disease should be considered with any type of recurrent low back pain.     

Human subject rear passenger symptom response to frontal car-to-car low-speed crash tests

Objective

The purpose of this study was to determine whether healthy adult volunteers report symptoms following exposure to low-speed frontal crashes at low velocities.

Methods

Nineteen medically screened, healthy, informed, and willing volunteers (17 men, 2 women; mean age, 37 years) were exposed to low-speed frontal crashes. All volunteers were seated in the rear seat position of the bullet vehicle. Closing velocities ranged from 4.1 to 8.3 mph (mean, 6.7 mph). For the bullet vehicle, the delta V ranged from 1.4 to 3.9 mph with a mean of 2.8 mph.

Results

Eighty-eight percent of volunteers attributed symptoms of discomfort to their crash exposure. All reported symptoms were transient, and none required medical treatment. The mean duration was 1 day.

Conclusions

Even at relatively low speeds, there is no lower threshold below which it can be reasonably assumed that healthy and prepared volunteer rear seat passengers will not sustain some level of minor injury in a frontal collision. Although the reported mean delta V for injured persons in real-world frontal crashes has been reported to be as high as 8.1 mph, this does not offer any insight into the minimum threshold for such injuries among all at-risk vehicle occupants.     

如何提高文献分类标引质量

分析了影响图书分类标引质量的因素,并结合宁夏医科大学图书馆的实际情况,提出了提高文献分类标引质量的一些措施。     

医学文献的标引深度与知识创新

浅意识标引、次浅意识标引和深意识标引可从不同层面揭示医学文献中的知识.通过这三种文献标引方式,经过标引的语句、结构、语义关系,将有效知识进行系统化组织,为形成新理论、技术和方法打下基础.     

部分军队医学期刊论文关键词标引质量的调查

以中国生物医学文献数据库（CBMdi8c）的主题标引为金标准，对数据库中用主题词标引的23种军队医学期刊，共计265篇医学论文关键词标引进行对比分析。发现其中存在4个方面问题：一是标引质量问题；二是主、副主题词组配错误；三是将缺乏检索意义的形容词、副词及专业上未得到公认和未被普遍使用的缩略词用作关键词；四是关键词数量普遍不足。为提尚关键词标引质量，应重视关键词标引工作的意义，切忌随意性、潦草对待；配备最新的标引工具书；标引工作严格遵循标准化程序，提高整个行业的质量水平。     

武汉220KV李民线、李展线之XLPE电缆工程

从用户检索利用的角度分析分类标引工作的质量要求及其进一步深化的可能性，提出相应的质量保证措施。     

计算机编目中的分类标引

利用<中图法>进行计算机编目的分类标引时,应本着实用性原则,着重增加对文献多重学科与专业属性的揭示,掌握适度的分类标引广度与深度,并与主题标引相结合,能有效地提高读者的检全率和检准率.     

医学主题词的选取

正确对科技论文的主题进行标引,是提高论文被引用的关键环节。为提高论文的标引质量,作者论述了医学科技论文主题词选取的一般原则和使用医学主题词表的方法,并对某些主题词的特殊表现形式加以介绍。     

The efficacy of sonographic morphology indexing and serum CA-125 for preoperative differentiation of malignant from benign ovarian tumors in patients after operation with ovarian tumors

Objective

To evaluate the value of sonographic morphology indexing (MI) system and serum CA-125 levels in the assessment of the malignancy risk in patients with ovarian tumors.

Methods

From September 2000 to July 2006, 202 patients who underwent surgery for ovarian tumors were reviewed retrospectively. In all patients, the MI score and serum CA-125 level were measured preoperatively. The association of the final pathologic diagnosis with the MI score and serum CA-125 level were examined.

Results

There were 26 malignant tumors out of 141 ovarian tumors with a MI ≥5 (18%). With a cut-off value of 5, the sensitivity, specificity, PPV, and NPV of MI scores were 0.743, 0.293, 0.181, and 0.845, respectively. There were 22 malignant tumors out of 54 ovarian tumors with serum CA-125 >30 u/ml (41%). With a cut-off value of 30 u/ml, the sensitivity, specificity, PPV, and NPV of serum CA-125 level were 0.667, 0.808, 0.407, and NPV 0.925, respectively. On ROC curve, the optimal cut-off value of MI score was 6.5-7.5 and that of serum CA-125 level was 25.6-28.5 u/ml. With a cut-off value of 7, the sensitivity and 1-specificity of MI score were 0.875-0.917 and 0.023-0.203, respectively. After the exclusion of teratoma cases, the sensitivity and 1-specificity of MI score were 0.875-0.917 and 0.046-0.138, respectively. With a cut-off value of 25.6-28.5 u/ml, the sensitivity and 1-specificity of serum CA-125 level were 0.958 and 0.203-0.215, respectively.

Conclusion

The sonographic MI system is an accurate and simple method to differentiate a malignant tumor from a benign ovarian tumor. The accuracy of the sonographic MI system improved when the serum CA-125 level was considered and ovarian teratomas were excluded.     

医学文献主题标引中副主题词使用问题分析

对医学文献标引中关于副主题词使用的常见错误进行了分析,通过实例说明副主题词的修饰限制作用,并对