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1.
The critical effects of pH on the electronic absorption and fluorescence characteristics of the siderophore, pyochelin, are investigated. A single anionic species is shown to be sufficient to explain the data obtained under alkaline conditions. In acidic solutions, several competing ground- and excited-state equilibria are present, which lead to fluorescence emissions from both the protonated form of pyochelin and its phenolate ion. From the spectroscopic data we are also able to show that pyochelin interacts with zinc ions in the ground state via its anionic form, thereby confirming that this siderophore does not bind Fe(III) ions uniquely.  相似文献   

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Surgical management of parathyroid disease   总被引:1,自引:0,他引:1  
One hundred fifty patients who had operation for hyperparathyroidism at the National Institutes of Health are reviewed. The series is composed of several groups of patients, including 18 with normocalcemic hyperparathyroidism, 13 with hyperparathyroidism associated with MEA II, and 24 patients with a history of previous parathyroid operation. Selective venous catherization and radioimmunoassay of parathormone was carried out in 81 patients and was interpreted as being localizing in 65 cases. Following operation, six patients remained hypercalcemic. There were nine instances of permanent hypocalcemia and four cases in which permanent recurrent nerve injuries were experienced. The operative management of these patients is outlined in detail, stressing an approach which includes the surgeon, the internist and the pathologist. Based upon pathological evidence, the importance of identifying by frozen section four glands is emphasized.  相似文献   

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Of 93 children with Crohn's disease treated at the H?pital Sainte-Justine between 1967 and 1979, 39 were operated on. Ten had abscesses and anal fistulas drained and in 29 the bowel was resected. The mean age of the children was 13 years. The average time between onset and diagnosis for both the medical and surgical groups was 13 months. Medical treatment failed in 25 patients after an average time of 22 +/- 17 months. Fourteen patients had an initial laparotomy, with a false diagnosis of appendicitis in 8, abdominal tumour in 2 and Meckel's diverticulum in 1. Indications for operation were: intestinal obstruction, bowel fistula, intra-abdominal abscess, gastrointestinal hemorrhage, growth failure and toxic megacolon. There were no deaths and only two postoperative infections. Crohn's disease seems to be becoming more frequent, more severe and starting earlier in life. Three to 6 weeks of preoperative preparation with enteral and parenteral nutrition allows operation to be performed under safer conditions. Although the recurrence rate after operation is still high, there is no doubt that the children enjoy a better quality of life, growth and a 50% chance of being disease-free 10 years later.  相似文献   

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Its is the task of each medical specialty to develop guidelines for diagnosis and therapies. Examinations done by several specialties should follow a common consensus. A randomized survey at 70 German ENT departments investigated the current position of tracheobronchoscopy and esophagoscopy at each institution. Sixty questionnaires were evaluable. Altogether 8,295 tracheobronchoscopies and 10,404 esophagoscopies were performed. Thirty-six percent of all tracheobronchoscopies and 6% of all esophagoscopies were done with a flexible system. Approximately 58% of all tracheobronchoscopies and 55% of all esophagoscopies were performed for tumor staging. Complications during tracheobronchoscopy occurred in 0.8% of cases and in 0.58% of the esophagoscopies. Using these data an interdisciplinary quality assurance concept was developed for tracheobronchoscopy and esophagoscopy. Current experience has shown that a otolaryngologists in Germany mainly perform rigid tracheobronchoscopy and esophagoscopy. Although endoscopy is mostly done in cases with varied anatomic structures, complications are very rare and comparable to flexible techniques. Greater experience with flexible systems also is to be encouraged in ENT departments.  相似文献   

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Antireflux surgery is successful in 85-90% of eligible patients, with relief of symptoms, cure of oesophagitis and possibly prevention of progression of the dysplasia in a Barrett's oesophagus. The mortality in the latest publications is given as 0.05%. The morbidity, apart from recurrences, is not yet sufficiently known. Some 250 antireflux operations are performed annually in the Netherlands, fewer than 20% of the estimated requirement of 10 operations per 100,000 of the population per year, and also fewer than in Scandinavia. Nissen fundoplication (folding the fundus of the stomach around the entire circumference (360 degrees) of the oesophagus) is generally accepted as the standard primary operation. Nissen fundoplication during laparoscopy seems to be just as good. Results of randomized clinical trials will have to be awaited to prove this assumption. Belsey's operation (folding the fundus around 270 degrees of the circumference of the oesophagus via thoracotomy) is nowadays performed almost exclusively in recurrent reflux disease and in persistent dysphagia after a primary operation.  相似文献   

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Modern techniques have substantially improved the outcome of surgical therapy for reflux. Surgery, therefore, should not be considered a method of last resort but instead a reasonable alternative to treat patients with abnormal reflux. Adequate preoperative staging of the disease helps design the most appropriate operation. Minimally invasive techniques improve exposure and enhance recovery. Control of symptoms is achieved in the great majority of patients, and complications are minimal if the operation is performed following basic principles of sound operative technique.  相似文献   

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A retrospective study of the results of operative treatment of 60 long bones secondaries in 46 patients was carried out. The mean period of follow-up was 10 months. The most common primary in this study was carcinoma of the breast (28.2%), followed by carcinoma of the lung (21.7%) and unknown primary (10.9%). Three groups of patients were studied--pathological fracture group, prophylactic fixation group and a mixed group. In the pathological fracture group, 70% of patients achieved good to excellent pain relief and 60.9% was able to walk with or without walking aids. In the prophylactic group, all the patients achieved good to excellent pain relief and 60% were able to ambulate with or without walking aids. In the mixed group, all the patients achieved good to excellent pain relief and 66.6% of the patients were able to walk with aids. The operative mortality in both the pathological fracture group and prophylactic fixation group was 10% and 33.3% in the mixed group. Multiple internal fixation performed at one operative session was associated with high operative mortality (50%).  相似文献   

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Infectious disease of the spine is infrequently seen in the rehabilitation setting. We examined retrospectively 26 patients with spinal infections admitted to the rehabilitation centre over a 6-year period to determine the demographic characteristics, clinical features and outcome after rehabilitation. Their ages ranged from 24 to 83 years (mean = 56.4); 65.4% were males. The infection was due to pyogenic bacteria in 14 patients (53.8%) and Mycobacterium tuberculosis in 12 (46.2%). Staphylococcus aureus was the causative agent in 69% of those with pyogenic infections. A history of diabetes mellitus was present in 35.7% of the pyogenic group but in only 8.3% of the tuberculous group. Localised back pain, fever and neurological deficits were the typical clinical manifestations. The most common site of infection was the thoracic region. Surgery was performed on 24 patients and all received prolonged courses of antibiotics. All but three patients completed the rehabilitation programme. The motor score for the lower limbs and the modified Barthel scores for activities of daily living (ADL) and mobility improved significantly (P < 0.05) for both pyogenic and tuberculous groups. The amounts of improvement achieved were not significantly different between the pyogenic and tuberculous groups except for ADL. Age, gender and the presence of diabetes mellitus did not appear to significantly affect the neurological or functional outcome in our study population. The majority of patients (87.5%) were discharged to their own homes.  相似文献   

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This report reviews 21 capsulorrhaphies for for hydatid disease of the liver. At operation, the cysts were intact, with clear fluid, and there was no gross bile oozing in the residual hepatic cavity. The largest amount of normal saline solution that filled a cavity in the right lobe was 650 ml. Only one patient (5%) underwent a second operation 16 days after the first one for infection that developed in a right lobe cavity after capsulorrhaphy. Insertion of a drain secured the recovery in three weeks. In retrospect, retention of a daughter cyst that was recovered at the second operation could account for this complication. The postoperative hospitalization period was eight to ten days for these patients. One can conclude from this experience that capsulorrhaphy has solved the problem of residual cavity provided that the technical points are observed.  相似文献   

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The Authors report their experience in the treatment of Graves disease. After a short review of the literature, the Authors stress the medical trait of such disease with possible spontaneous resolution. Therefore the number of cases surgically treated is necessarily low. Thirty patients, all with specific antibodies, were treated with total thyroidectomy. The therapy chosen and the results obtained are herein shown. No definitive hypoparathyroidism and inferior laryngeal nerve injuries were registered.  相似文献   

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We treated 12 patients with intractable Peyronie's disease with a new approach based on simple incision of the fibrotic plaque(s) and stenting of the corpora with penile implants. Infection in 1 case necessitated removal of the prostheses, while the remaining 11 patients had satisfactory functional and anatomical results. The procedure is indicated for patients with 1) Peyronie's disease and impotency, 2) normal potency and extensive disease and 3) normal potency and localized disease in selective cases. In this series insertion of the penile prostheses did not change sexual prowess in previously potent patients.  相似文献   

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Between 1982 and May 1993, we operated on 680 patients with combined valvular disease. Previous operations were including closed mitral commissurotomy in 87, and bioprosthetic valve replacement in mitral position in 15. The types of combined valve disease included mitral valve disease combined with functional tricuspid regurgitation (FTR) (245), with organic tricuspid disease (OTD) (10); mitral and aortic disease (258), combined with FTR (128), and with OTD (39). The early mortality was 4.7% in total 2.4% and 6.1% respectively in MVR or DVR plus tricuspid procedures. The main cause of early death was low cardiac output syndrome. The late mortality was 2.6% pt-yr, congestive heart failure and coagulant-related hemorrhage were the predominant causes of late death. We considered that FTR is the outcome of right ventricle decompensation, while tricuspid valve must be actively inspected intraoperatively, and must be corrected completely. OTD can be successfully repaired in most patients. Myocardial protection should be emphasized, and continuous perfusion of cold blood cardioplegia and controlled reperfusion of warm blood contained mannitol have marked effect.  相似文献   

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A theoretical model is presented that takes etiological factors into account in describing behavioral and constitutional factors associated with fibrocystic disease and breast cancer. The model identifies 5 variables: genetic background and familial history; life cycle events; dietary habits; use of exogenous estrogens; and psychological factors, including life stresses, anxiety or tension, and depression. Most of the variables are hypothesized to increase the risk of breast pathology by inducing physiological changes—specifically, by fostering endocrinopathy or immunosuppression. Supportive research is cited, and the relationship between fibrocystic disease and breast cancer is detailed. Implications for prevention and for rehabilitation of women with breast disease are described. (91 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

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A 65-year-old man undergoes a routine checkup before retiring. His wife has urged him to have his prostate examined, because she has read about testing for prostate cancer and a friend has just died of this disease. During the rectal examination, the man's physician discovers some firmness in the right lobe of the prostate gland. The patient has had no urinary symptoms and is in excellent general health. Sexual function is normal. There is no history of prostate cancer; his father died of a stroke at age 86 years. Testing shows that the patient's prostate-specific antigen level is 9.3 ng/mL, and he is referred to a urologist. Transrectal ultrasound-guided needle biopsy reveals adenocarcinoma with a Gleason score of 7 (intermediate grade). At a follow-up meeting with his physician, the patient says, "I have been doing some research, and it appears that I should have treatment. However, what is less clear to me is what form of therapy is best--surgery or radiation treatment. Please tell me what you can about the state of the art with respect to surgery."  相似文献   

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