基于Windows下Modem软件研究与设计

本文研究了Windows操作系统下I／O端口应用问题，用VC^ 6．0嵌入汇编语言技术，为“远传水表系统”项目开发了Modem通讯软件，并给出了部分实现函数。实践表明，软件运行良好。     

Pulmonary infarcts can mimic pulmonary metastases from renal cancer

PURPOSE: Spontaneous regression of pulmonary metastases from renal cell carcinoma is a rare but well documented event. We present 2 recent cases that were radiographically consistent with pulmonary metastases from renal cell carcinoma but were pathologically shown to be pulmonary infarcts with no evidence of metastatic cells. Stable pulmonary infarcts can be misconstrued as metastatic disease in patients with renal cell carcinoma while resolving pulmonary infarcts may represent a subpopulation of patients with apparent spontaneous regression. Clinical implications of these findings are discussed. MATERIALS AND METHODS: Clinical and pathological data from 2 patients with large primary renal tumors, venous thrombi and lung masses were reviewed. Data from these cases, as well as pertinent urological and pathological literature, are presented. RESULTS: Although preoperative assessment was consistent with stage IV renal cell carcinoma, pathological examination of the lung masses in these patients showed no evidence of tumor cells. CONCLUSIONS: Pulmonary infarcts may mimic resolving or stable pulmonary metastasis in patients with renal cell carcinoma. Accurate clinical staging is crucial for the prognosis and treatment of renal cell carcinoma. Mistaking pulmonary infarcts for metastatic lesions can lead to inaccurate prognoses and inappropriate treatment.     

蒸发器在设计、制造中存在的问题及改进

根据离子膜法碱液蒸发器的长期使用情况，分析了在其设计、制造、安装中存在的一些问题，并给出了改进措施。     

Extracorporeal photopheresis in therapy-refractory disseminated discoid lupus erythematosus

BACKGROUND: The place of acid pump inhibitors at the top of the efficacy table in the league of reflux therapies, and their eager patient acceptance, has aroused debate on their role. OBJECTIVE: To understand the role of gastric acid and its inhibition in the pathogenesis and treatment of gastroesophageal reflux disease. DISCUSSION: Gastroesophageal reflux disease results from excessive exposure of the oesophagus to acidic contents. Acid pump inhibitors provide the most effective medical control of gastric acid throughout day and night, returning oesophageal pH to normal levels. They provide fast symptom relief and rapidly restore quality of life in all reflux patients more effectively than H2 receptor antagonists or prokinetic drugs. APIs heal oesophagitis of all grades of severity and provide safe, effective maintenance of healing with prevention of complications in longer term use.     

Some pharmacological studies on Artemisia herba-alba (Asso.) in rabbits and mice

This clinical research plan was designed to evaluate the predictable and current developments, growth, and stability of the economic status of part-time or full-time African-American practicing surgeons. In many communities throughout the United States, the economic successes of certified or experienced black surgical specialists are inhibited or modified by mistrust, jealousy, professional disengagements, prejudices, and self-hatred by black and white physicians and lay African Americans. Nevertheless, there are subtle and overt evidences of increasing satisfactory and above average associative interprofessional relationships between African-American physicians and surgical specialists. One hundred African-American surgical specialists from thirty-four communities in the United States were interviewed at periodic intervals over a period of three decades. Recommendations for improvements and changes are presented.     

Isolated lung perfusion with tumor necrosis factor for pulmonary metastases

BACKGROUND: A phase I trial was initiated to define the feasibility and safety of single-lung isolation perfusion with tumor necrosis factor-alpha, interferon-gamma, and moderate hyperthermia for patients with unresectable pulmonary metastases. METHODS: Twenty patients with lung metastases (Ewing's, 2; sarcoma, 8; melanoma, 6; other, 4) were considered for single-lung isolation perfusion with 0.3 to 6.0 mg of tumor necrosis factor-alpha and 0.2 mg interferon-gamma delivered through an oxygenated pump circuit. Sixteen perfusions were performed in 15 patients (bilateral in 1). Metastases were completely resected (no single-lung isolation perfusion) in 3 patients, 1 patient had extrapulmonary disease, and one single-lung isolation perfusion was aborted for mechanical reasons. RESULTS: There were no significant changes in systemic arterial blood pressure or cardiac output during perfusion. Systolic pulmonary artery pressure increased with isolation, but returned to pre-single-lung isolation perfusion levels after clamp release. The maximum systemic tumor necrosis factor-alpha level was 8 ng/mL, whereas pump-circuit levels ranged from 200 to 10,976 ng/mL. There were no deaths, and the mean hospitalization period was 9 days (range, 5 to 34 days). A short-term (6 to 9 month) unilateral decrease in perfused nodules was noted in 3 patients (melanoma in 1, adenoid cystic carcinoma in 1, renal cell carcinoma in 1). CONCLUSIONS: Future studies using a combination of biologic modifiers, chemotherapy, and hyperthermia should be pursued to define active cytotoxic agents that will preserve underlying pulmonary function.     

Therapeutic options for severe pulmonary hypertension

Pulmonary hypertension occurs as a consequence of numerous and varied conditions, all of which result in an elevation of pulmonary vascular resistance. Over the past decade, significant progress has been made in understanding the factors which contribute to the progressive nature of pulmonary vascular disease, and in identifying new treatments for pulmonary hypertension. The majority of these therapeutic options are pharmacologic, but for specific circumstances, surgical therapy may be a consideration. This article discusses nonspecific therapies for all patients with pulmonary hypertension, vasodilator therapy (including screening for vasodilator responsiveness, standard oral agents, and newer intravenous or inhalational therapies) and surgical options applicable to specific situations.     

Effect of prolonged starvation on the activities of malic enzyme and acetylcholinesterase in tissues of Japanese quail

During starvation muscle protein degradation is increased but the mechanism for this is uncertain. In this study Japanese quail were starved for 5 days and the activities of malic enzyme and acetylcholinesterase were determined in various tissues. SDS-polyacrylamide gel electrophoresis showed that the soluble proteins with molecular weights corresponding to 160, 120, 108, 99 and 38 kDa were absent in the liver of the starved group. In the pectoral muscle the soluble proteins with molecular weights corresponding to 69, 41 and 34 kDa were missing. The activity of malic enzyme in the liver, heart and pectoral muscle of the starved group decreased markedly whereas that of acetylcholinesterase increased markedly in the pectoral muscle (P < 0.005). It is concluded that in prolonged starvation acetylcholinesterase synthesis may be induced in tissues being subjected to protein catabolism and that this enzyme may be involved as a protease in protein degradation.