术前IADSA和栓塞术在鼻咽纤维血管瘤治疗中的应用

目的：研究分析术前经动脉数字减影血管造影（ＩＡＤＳＡ）和栓塞术在鼻咽纤维血管瘤治疗中的价值。方法：分析本院２１例鼻咽纤维血管瘤患者的临床分析治疗资料，１主后１年复发，再次手术治疗。２２次手术中，术前行及未行ＩＡＤＳＡ和栓塞术的各１１次。 术前示行和行ＩＡＤＳＡ和栓塞术的要中平均出血量和输血量。结果：术前未行和行ＩＡＤＳＡ和栓塞术的术中出量量和输血量分别为１１３６ｍｌ、８３６ｍｌ、６７７ｍｌ、４００     

Evaluation of the effectiveness of preoperative embolization in surgery for nasopharyngeal angiofibroma

We retrospectively analyzed the clinical data of 21 patients (22 procedures) with histologically proven nasopharyngeal angiofibromas. Eleven patients underwent preoperative intra-arterial digital subtraction angiography (IADSA) and embolization with Gelfoam. Embolization reduced the intraoperative blood loss from an average of 1136 ml in the non-embolized patients to 677 ml in the embolized cases (P < 0.05) and transfusions from an average of 836 ml to 400 ml (P < 0.01). Results again show that preoperative embolization is effective in reducing intraoperative blood loss. Received: 10 May 1997 / Accepted: 21 October 1997     

基于DSP的人工电子耳语音信号处理的研究

介绍人工电子耳的基本原理和ClS语音信号处理方案,提出基于DSP芯片TMS320LF2407的硬件电路设计和软件编程流程,最后通过计算机对经过DSP处理后的语音数据进行了仿真和合成,实验结果表明合成语音与原始语音在频谱包络特征上非常相似.     

Quantitative computer‐assisted digital‐imaging upper airway analysis for obstructive sleep apnoea*

This was a prospective study of a new objective method which quantitatively analyses the upper airways in patients with obstructive sleep apnoea (OSA). Video‐nasopharyngoscopic examinations of the upper airways of 45 patients were carried out with an endoscopic calibrator. Images of the upper airway during quiet respiration and Mueller's manoeuvre in erect and supine positions were digitized by computer to generate the actual dimensions of obstructive sites. Measurements by the new method were validated by comparing 90 pairs of videoendoscopic images with upper airway magnetic resonance imaging (MRI) measurements at two identical levels. Quantitative precision is 100% for the retropalatal level and 95.6% for the retrolingual level with a tolerance of 0.5 cm² between the two methods. The absolute mean of the difference between the two methods of measurement is 0.08 cm² at the retropalatal level and 0.18 cm² at the retrolingual level. The agreement between the digital‐imaging videoendoscopic and MRI measurements was 93.3% for the retropalatal level and 95.6% for the retrolingual level. Quantitative computer‐assisted digital imaging is a reliable, cost‐effective clinical method of upper airway evaluation in OSA patients. This method allows us to examine the dynamic and static morphology objectively, measure surgical outcomes of upper airway, opening up new avenues for OSA management.     

Whole-abdomen, single-dose consolidation radiotherapy in patients with pathologically confirmed complete remission of advanced ovarian epithelial carcinoma: a long-term survival analysis

The value of consolidation therapy in advanced epithelial ovarian carcinoma patients is controversial. The aim of the present study was to assess the long-term survival of patients with a pathologically confirmed complete remission who had consolidation by single-dose, whole-abdominopelvic radiotherapy. Of 96 histologically confirmed stage II-IV epithelial ovarian carcinoma patients who underwent cytoreductive surgery followed by high-dose, platin-based chemotherapy, 57 were in complete clinical remission at the end of therapy and 50 underwent a second-look laparotomy. The study group comprises 32 consecutive patients who had no pathological evidence of disease and who received 800 cGy single-dose, whole-abdominal radiotherapy by an 8 MEV linear accelerator in a single fraction. The absolute 5-year survival and the actuarial 10-year survival were 78.7 and 63.3%, respectively. The survival was significantly better in patients who had < or =2 cm residual disease at the completion of the original operation. No severe postradiation complications were encountered. Mild complications were seen in three (9.4%) patients. Our data indicate a favorable long-term survival of patients with a negative second-look laparotomy who had consolidation with single-dose, whole-abdominal radiotherapy. These results seem to suggest that a collaborative, prospective, randomized multiarm study is indicated to solve the controversial issue of consolidation therapy.     

数字化医院的信息共享与标准化

阐述了数字化医院的概念，详细介绍总结了数字化医院的业务及信息构成，分析了目前数字化医院所面临的问题和困难，针对这些信息共享中存在的问题，提出了在电子病历、医疗设备信息传输以及信息系统信息交换三个方面进行标准化建设的观点，最后展望了深入完善和发展数字化医院、远程医疗及社区医疗的前景。     

种植体磁性固位全口义齿的初步研究

目的探讨种植体磁性附着体固位全口义齿的临床应用。方法下颌牙槽嵴严重萎缩吸收的全口义齿患者，在下颌骨前牙区骨内植入2枚种植体，4个月后制作覆盖全口义齿，磁铁安装在义齿面内。衔铁固定在种植体上，利用磁性附着体的磁吸力使全口义齿固位在牙槽骨上。结果种植体磁性固位全口义齿固位良好，患者说话和咀嚼效果满意。结论种植体磁性附体固位全口义齿。对于牙槽嵴严重萎缩吸收的患者，能明显示改善固位和咀嚼效果。     

CR与DR应用价值探讨

通过对CR与DR的原理分析、主要参数比较、操作使用比较、软件功能比较、设备发展前景比较以及作者通过数年的CR、DR使用经验认为：CR目前在中小型医院仍不失为较方便的数字摄影过渡设备,但医院达到大于100人/日的规模时,则必须以DR为主要摄影设备,CR只能作为辅助摄影设备.     

基于MSP430嵌入式系统的数字脉搏计

本仪器利用光电传感器获取脉搏信号,经GL324模块实现信号的放大和整形,由单片机完成周期的测定并换算为每分钟脉搏数,再送液晶显示模块显示。低功耗和微型化设计,实现了脉搏测量便携化。     

管电压对胸部DR影像质量的影响

目的 研究有效剂量相等条件下不同管电压对胸部DR图像质量的影响。方法 48例病人在90kV、125kV、150kV分别摄取后前位胸片，未经任何处理打印片子，五位资深放射专家采用五分法独立打分评估影像质量；采用Monte—Carlo转换因子估算有效剂量ED（mSv）。结果 绝大多数解剖结构在90千伏时得分最高（平均得分3．10），除了在心影轮廓、气管隆突和外围纹理方面以外，其余部位均有明显统计学差异。结论 有效剂量相等条件下采用较低千伏能获得更好胸部DR影像。