S Fujimura

Miyagi University, Japan

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Publications (357)416.4 Total impact

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    ABSTRACT: Factors that can interfere with the successful treatment of Mycobacterium avium lung infection have been inadequately studied. To identify a potent predictor of therapeutic responses of M. avium lung infection, we analyzed variable number tandem repeats (VNTR) at 16 minisatellite loci of M. avium clinical isolates. Associations between the VNTR profiling data and a therapeutic response were evaluated in 59 subjects with M. avium lung infection. M. avium lung infection of 30 subjects in whom clarithromycin-containing regimens produced microbiological and radiographic improvement was defined as responsive disease, while that of the remaining 29 subjects was defined as refractory disease. In phylogenetic analysis using the genotypic distance aggregated from 16-dimensional VNTR data, 59 M. avium isolates were divided into three clusters, which showed a nearly significant association with therapeutic responses (p 0.06). We then subjected the raw 16-dimensional VNTR data directly to principal component analysis, and identified the genetic features that were significantly associated with the therapeutic response (p <0.05). By further analysis of logistic regression with a stepwise variable-selection, we constructed the highest likelihood multivariate model, adjusted for age, to predict a therapeutic response, using VNTR data from only four minisatellite loci. In conclusion, we identified four mycobacterial minisatellite loci that together were associated with the therapeutic response of M. avium lung infections.
    Clinical Microbiology and Infection 05/2013; · 4.58 Impact Factor
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    ABSTRACT: Mycobacteria are among the most common causes of hypersensitivity pneumonitis (HP), but controversy persists with regard to the involvement of the infectious potency of the organism in mycobacterial HP (hot tub lung). This study aimed to establish a mouse model of hot tub lung to clarify its pathophysiology. Mice were exposed intranasally to formalin-killed Mycobacterium avium from a patient with hot tub lung (HP strain) or chronic pulmonary infection (non-HP strain), and bronchoalveolar lavage fluids and lung tissues were evaluated for allergic inflammation. Dead M. avium HP strain, but not non-HP strain, elicited marked HP-like pulmonary inflammation in wild-type mice. Although the inflammation was induced in mice lacking CD4 or CD8, the induction of HP-like responses was prevented in mice lacking myeloid differentiation factor (MyD)88 or Toll-like receptor (TLR)9. Cultured lung CD11c+ cells responded to M. avium in a TLR9-dependent manner, and reconstitution of TLR9-/- mice with lung CD11c+ cells from wild-type mice restored the inflammatory responses. Further investigation revealed that pulmonary exposure to M. avium HP strain increased the number of lung CD11b+ CD11c+ cells (dendritic cells) through TLR9 signalling. Our results provide evidence that hot tub lung develops via the mycobacterial engagement of TLR9-MyD88 signalling in lung CD11b+ dendritic cells independent of the mycobacterial infectious capacity.
    European Respiratory Journal 01/2011; 38(3):688-701. · 6.36 Impact Factor
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    ABSTRACT: Although quality control is essential in mass screening system for early detection of cancer, no global method for quality control has not been established, because the mass screening system in each country is quite different from each other. At present, we have to find appropriate method for each cancer and for each country. In 2000, The Lung Cancer Screening Division (LCSD) of the Miyagi Prefectural Committee for Management of the Cancer Screening System (Miyagi PCMCSS) decided to evaluate annually whether the local governments had appropriate information to evaluate the quality of lung cancer screening systems, announcing that the results would be informed to residents. On the basis of the manual developed by the Ministry of Health, Labor and Welfare, 45 items were selected as indicators for the survey, which could be obtained easily when the screening had been conducted according to the standard method. LCSD of Miyagi PCMCSS sent a questionnaire including the 45 items to the municipalities. According to the reply to the questionnaire, LCSD rated each municipality using a 5-rank classification depend on the number of insufficient items: A: 0; B: 1-4; C: 5-8; D: 9 or more; E: no reply. As the results, 58, 3, 6, 3, and 0 municipalities were categorized in 2002 as A, B, C, D, and E, respectively. In 2003, the number of municipalities changed to 60, 7, 2, 1, and 0. In 2005, the distribution improved more, such as 68, 2, 0, 0, and 0. The detection rate of lung cancer also improved. It is possible for PCMCSS to annually conduct surveys to determine whether the local government has appropriate information to evaluate the quality of lung cancer screening systems. Such surveys improve the distribution of response to better direction.
    Lung Cancer 07/2008; 63(2):291-4. · 3.39 Impact Factor
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    ABSTRACT: In animal models and human trials, Lactobacillus gasseri OLL2716 (LG21) strain suppressed Helicobacter pylori colonization in the stomach. The aim of the present study was to clarify whether orally administered LG21 strain can enter the gastric mucus layer. Biopsy samples were taken from the gastric antrum and corpus of two healthy volunteers (H. pylori infected and non-infected) who drank yogurt supplemented with LG21 strains. DNA of LG21 and H. pylori in the mucus layer was detected using the laser-assisted microdissection and non-contact pressure catapulting (LMPC) method and the semi-nested PCR method with primer sets of RNA helicases of superfamily II gene-Insertion sequence for LG21 strain and those of ureA gene for H. pylori. In the volunteer with H. pylori infection, DNA fragments of LG21- and H. pylori-specific regions from both antrum and corpus were amplified, whereas in a non-infected volunteer, only the LG21 DNA from the antrum was amplified. The present study demonstrated that LG21 strains administered through a yogurt drink can enter into the gastric mucus layer. Our novel method may be useful in studying gastric probiotics for H. pylori infection.
    Letters in Applied Microbiology 12/2006; 43(5):578-81. · 1.63 Impact Factor
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    S Fujimura, S Kato, T Kawamura
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    ABSTRACT: The major transmission route of Helicobacter pylori remains unclear. In this study, we examined H. pylori in the environmental waters in Japan. A total of 24 water samples were collected from the upper, middle and downstream reaches of four Japanese rivers. Helicobacter pylori-specific DNA was examined using nested PCR. In addition, 224 children who lived near one river were studied by the stool antigen test for H. pylori prevalence. Helicobacter pylori DNA was detected in the water from the middle and downstream reaches of all four rivers, but not in the upper reaches. Helicobacter pylori was not found in cultured water samples with positive PCR results. Helicobacter pylori prevalence in the children examined was 9.8% for those living near the middle reaches and 23.8% nearby downstream, both of which were higher than the value in an area distant from the river (0%) (both, P < 0.01). Difference in H. pylori prevalence in the children may be related to the presence of H. pylori in the river. The results of this study showed that H. pylori DNA is frequently present in river water from the middle and downstream reaches in which the human biosphere is embedded. It is suggested that river water in the natural environment could be a risk factor for H. pylori transmission.
    Letters in Applied Microbiology 02/2004; 38(6):517-21. · 1.63 Impact Factor
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    ABSTRACT: In stage I non-small cell lung cancer (NSCLC), the cancer is localized to the lung. For this early stage NSCLC, therefore, surgery is considered to be the treatment of choice. In this report, we reviewed the surgical treatment approaches for stage I NSCLC, placing emphasis on limited resection and video-assisted thoracic surgery (VATS). In regard to limited resection, sublobar resection (wedge resection and segmentectomy) may yield a good long-term outcome in selected cases, as does lobectomy. No strong evidence to recommend this procedure has, however, been published. On the other hand, many descriptive studies have indicated that VATS may be useful for the treatment of NSCLC, although the results have not shown any statistically significant differences from those of resection by conventional open thoracotomy. In addition to the low invasiveness, the curability of NSCLC using the VATS approach has been recognized to be similar to that of the standard thoracotomic approaches in clinical practice. Well-controlled studies with strong statistical results are needed to provide strong supportive evidence for the use of VATS for NSCLC. (Ann Thorac Cardiovasc Surg 2003; 9: 283-9)
    Annals of thoracic and cardiovascular surgery: official journal of the Association of Thoracic and Cardiovascular Surgeons of Asia 11/2003; 9(5):283-9. · 0.47 Impact Factor
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    ABSTRACT: The efficacy of lung cancer screening is still controversial. In order to evaluate efficacy of mass screening for lung cancer in 1990s, the Japanese Ministry of Health and Welfare planned to conduct four independent case-control studies in four different regions; Miyagi, Gunma, Niigata, and Okayama Prefecture. The study design of all the four studies was a matched case-control study in which the decedents from lung cancer were defined as cases. In Gunma Prefecture, a screening examination is annual miniature chest X-ray only, whereas sputum cytology is added for high-risk screenees in others. Matching conditions were gender, year of birth, smoking histories (except Okayama), and municipality. Smoking adjusted odds ratio (OR) of dying from lung cancer for those screened within 12 months before case diagnosis compared with those not screened ranged 0.40-0.68. Three of four studies revealed statistically significant reduction of the risk for lung cancer death. OR of pooled analysis, where all sets were combined and analyzed, was 0.56 (95% confidence interval: 0.48-0.65). Recent mass screening program for lung cancer in Japan could reduce the risk for lung cancer death. However, the possibility exists that some confounding factors affected the results. In order to elucidate whether the results can be applied to Western countries, further studies will be required.
    Lung Cancer 08/2003; 41(1):29-36. · 3.39 Impact Factor
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    ABSTRACT: A prospective randomized trial was performed to investigate the prognostic advantage of postoperative adjuvant chemotherapy in patients with resected stage I-II non-small cell lung cancer (NSCLC). From March 1992 to December 1994, 221 patients with completely resected stage I-II primary NSCLC were enrolled and randomly assigned to two groups, as follows: 2-year oral administration of Uracil plus Tegafur (UFT) (adjuvant group, 109 patients), and surgical treatment alone (control group, 110 patients). The overall 5-year survival rates were 79% for the adjuvant group and 75% for the control group, and there was no statistical significance. The 5-year disease-free survival rates were 78% for the adjuvant group and 71% for the control group, and there was also no statistical significance. There have been seen no severe complications in the adjuvant group. The mean total dosages of UFT were about 75% of maximum basic amount. The UFT regimen was feasible. However, we have not observed any survival benefit in the adjuvant group. Larger trials are needed to confirm the effect of UFT to patients with resected NSCLC.
    Lung Cancer 06/2003; 40(2):181-6. · 3.39 Impact Factor
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    ABSTRACT: To investigate the existence of Helicobacter pylori in cow's milk as one of the foods which most Japanese children eat. Detection of H. pylori was demonstrated by the semi-nested polymerase chain reaction (PCR), a culture method and electron microscopy. Semi-nested PCR demonstrated the ureA gene of H. pylori in 13 of 18 (72.2%) raw milk samples and in 11 of 20 (55%) commercial pasteurized milk samples. Helicobacter pylori binding immunomagnetic beads with H. pylori-specific goat anti-H. pylori antibody was shown by electron microscopy in both raw and pasteurized milk positive for the ureA gene. Helicobacter pylori was cultured in one raw milk sample, whereas it was not cultured in pasteurized milk samples. There is a possibility that cow's milk is a transmission vehicle in childhood H. pylori infection, although we failed to confirm the survival of H. pylori in pasteurized milk.
    Letters in Applied Microbiology 02/2002; 35(6):504-7. · 1.63 Impact Factor
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    ABSTRACT: We investigated the antibacterial activity of 12 antibiotics, inclusive of four carbapenems, against 167 strains of respiratory pathogens isolated between 1999 and 2000. Thirty strains of methicillin-susceptible Staphylococcus aureus (MSSA), 28 strains of methicillin-resistant S. aureus (MRSA), 11 strains of penicillin-susceptible Streptococcus pneumoniae (PSSP), 29 strains of penicillin-resistant S. pneumoniae (PRSP), 30 strains of Pseudomonas aeruginosa, 14 strains of Moraxella catarrhalis, and 25 strains of Haemophilus influenzae were examined. The minimum inhibitory concentration (MICs)50/90 (microg/ml) of imipenem, panipenem, meropenem, and biapenem against the clinical isolates obtained between 1999 and 2000 were: 0.06/0.25, 0.12/0.25, 0.12/0.25, and 0.12/0.25, respectively, against MSSA; 16/32, 16/32, 16/32, and 8/32 against MRSA; < or = 0.015/0.06, < or = 0.015/0.03, 0.03/0.12, and < or = 0.015/0.06 against PSSP; 0.12/0.25, 0.03/0.06, 0.25/0.5, and 0.12/0.25 against PRSP; 1/8, 2/8, 0.5/2, and 2/16 against P. aeruginosa; 0.06/0.06, 0.03/0.06, < or = 0.015/0.06, and 0.06/0.12 against M. catarrhalis; and 1/4, 1/4, 0.12/0.25, and 2/4 against H. influenzae. A comparison of the antibacterial activity of the four carbapenems with that found in our previous studies showed no significant difference in the susceptibility of clinical isolates, except for a slight decrease in the susceptibility of MSSA. Carbapenems have remained effective for severe infections. The MIC data showed that imipenem and panipenem were more active than meropenem and biapenem against gram-positive bacteria, and that meropenem and biapenem were more active than imipenem and panipenem against gram-negative bacteria. As only meropenem had an MIC90 below the breakpoint of pneumonia against all species except MRSA, meropenem was considered to be the most potent of the four carbapenems studied.
    Journal of Infection and Chemotherapy 01/2002; 7(4):267-71. · 1.55 Impact Factor
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    ABSTRACT: A 60-year-old female, diagnosed as scleroderma, was referred to our hospital because of symptoms of common cold and abnormal findings on a chest X-ray. The chest X-ray and CT scan revealed a mass in the left upper field, suspected to invade left anterior chest wall. Moreover, fibrotic changes were observed in the lung field. Cytology by bronchofiberscopy showed squamous cell carcinoma. Evaluation of pulmonary function, including unilateral pulmonary artery occlusion test (UPAO), revealed possibility of lung resection. Subsequently, pneumonectomy with combined resection of left 1st rib was performed. Postoperative course was uneventful and she was discharged. She was admitted again four months after the operation with appetite loss and body weight loss. Further examinations revealed arrhythmia, renal failure, pancreatitis and liver metastasis. Her general conditions grew worse and she died five months after the operation. In conclusion, UPAO was a useful method to determine the functional lung resectability for the case with scleroderma. However, effects of surgical stress for the development of scleroderma remain to be elucidated.
    Kyobu geka. The Japanese journal of thoracic surgery 08/2001; 54(7):606-9.
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    ABSTRACT: A 70-year-old female was operated on for extradural spinal cord tumor in 1982. Microscopic examination revealed the tumor as paraganglioma. Tumor recurred at paravertebral twice in 1985 and 1989, and they were also resected. In 1995, her chest X-ray film showed round tumor in the right upper field. Exploratory open lung biopsy was performed in 1996, and right upper lobectomy was performed according to for malignant lung tumor because intra-operative microscopic findings showed carcinoid or lung metastasis of paraganglioma. Chest wall tumor at paravertebral was resected at the same time. Postoperative microscopic examination revealed the tumors were same as operated paraganglioma. The 2nd thoracotomy was done in 1999, and two chest wall tumors and a pulmonary nodule in right S8 segment were resected. They were recurrence and pulmonary metastasis of paraganglioma. Now 18 years after initial operation, she is out of hospital in tumor free.
    Kyobu geka. The Japanese journal of thoracic surgery 08/2001; 54(7):610-3.
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    ABSTRACT: In Miyagi Prefecture, Japan, a mass screening program for lung cancer has been conducted since 1982 (miniature chest X-ray for all screenees and sputum cytology for those with a smoking index > or = 600) [smoking index 600 = 30 pack years, the average number of cigarettes smoked per day multiplied by the number of years of regular smoking]. Over 1500 lung carcinomas, including 250 roentgenographically occult lung tumors, were detected and treated up to 1999. In the current study, a nested case-control study was conducted in the population that was screened in 1989 to evaluate the efficacy of the screening program for lung cancer. To reduce self-selection bias, the source population was defined as screenees with negative results in 1989 (284,226 individuals). In the population, 474 individuals died of lung carcinoma during 1992-1994. After exclusion, 328 patients who died of primary lung carcinoma at between ages 40 years and 79 years were defined as the cases. Six controls were supposed to be selected in the source population for each case and matched by gender, year of birth, municipality, and smoking habits. Controls who had died or moved before the matched case was diagnosed were excluded. Finally, 328 cases and 1886 controls were selected. Screening histories were compared, and odds ratios were calculated using conditional logistic regression analysis. Within the 12 months before diagnosis, 241 of 328 cases (73.5%) had attended the screening compared with 1557 of 1886 controls (82.6%). The smoking-adjusted odds ratio was 0.54 (95% confidence interval, 0.41-0.73). The mass screening program for lung cancer in Miyagi Prefecture was capable of reducing by 46% the risk of death from carcinoma of the lung.
    Cancer 08/2001; 92(3):588-94. · 5.20 Impact Factor
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    ABSTRACT: Chronic hypoxia causes pulmonary hypertension and right ventricular hypertrophy associated with pulmonary vascular remodeling. Because hypoxia might promote generation of oxidative stress in vivo, we hypothesized that oxidative stress may play a role in the hypoxia-induced cardiopulmonary changes and examined the effect of treatment with the antioxidant N-acetylcysteine (NAC) in rats. NAC reduced hypoxia-induced cardiopulmonary alterations at 3 wk of hypoxia. Lung phosphatidylcholine hydroperoxide (PCOOH) increased at days 1 and 7 of the hypoxic exposure, and NAC attenuated the increase in lung PCOOH. Lung xanthine oxidase (XO) activity was elevated from day 1 through day 21, especially during the initial 3 days of the hypoxic exposure. The XO inhibitor allopurinol significantly inhibited the hypoxia-induced increase in lung PCOOH and pulmonary hypertension, and allopurinol treatment only for the initial 3 days also reduced the hypoxia-induced right ventricular hypertrophy and pulmonary vascular thickening. These results suggest that oxidative stress produced by activated XO in the induction phase of hypoxic exposure contributes to the development of chronic hypoxic pulmonary hypertension.
    Journal of Applied Physiology 05/2001; 90(4):1299-306. · 3.48 Impact Factor
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    ABSTRACT: The number of patients with lung cancer is increasing. This study was undertaken to realize the probability, fate and management of acute fatal postoperative complications. Since interstitial pneumonia was one of the most fatal postoperative complications, to know its incidence and fate is very important. A total of 2667 patients who underwent thoracotomy caused by malignant tumors during the past 17 years were reviewed and studied. We performed investigations on medical records, chest X-rays, whole-body CT films, operative records and pathological specimens for all inpatients. Nineteen patients died in hospital 30 days after thoracotomy (operative death). Nine patients died in hospital more than 31 days after thoracotomy (hospital death). Eight cases out of 28 patients (operative and hospital deaths) developed and finally died by interstitial pneumonia. Each case was treated with steroids, neutrophil-elastase inhibitor, and/or immunosuppressive agents. These patients could not be selected by any preoperative laboratory examination, such as preoperative pulmonary function tests, serum biochemistry tests, and chest X-ray or CT films. Interstitial pneumonia as a complication of postoperative stage, was fatal and once developed, it was very difficult to save their lives. Since we reported the cases who died from acute postoperative complications, especially interstitial pneumonia, we could not present effective management. However, in this report, several therapeutic trials that may solve the problems of acute postoperative interstitial pneumonia were proposed.
    The Journal of cardiovascular surgery 03/2001; 42(1):125-9. · 1.51 Impact Factor
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    ABSTRACT: Cardiopulmonary bypass (CPB) and diseased lung ventilation were presented as new methods of oxygenation during carinal reconstruction. Two cases of left sleeve pneumonectomy (SP) were performed for bronchial gland carcinoma through clamshell incisions. Adequate oxygenation and excellent operative fields were provided by CPB in both patients. The postoperative courses of these patients were uneventful, although they developed temporary pulmonary edema that needed mechanical ventilation and appropriate diuretics for several days. One case of patient with squamous cell carcinoma after chemotherapy was successfully treated by right SP through midline sternotomy. Adequate oxygenation and excellent operative fields was obtained by diseased right lung ventilation in this patient. The postoperative course of the patient was uneventful without mechanical ventilation support. These procedures of oxygenation in this paper are considered to be safe and effective methods for carinal reconstruction.
    Kyobu geka. The Japanese journal of thoracic surgery 02/2001; 54(1):24-30.
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    ABSTRACT: Reconstruction of chest wall using myocutaneous flap has been performed in 2 cases. A 72-year-old female referred to our hospital for locally recurrent left breast cancer without any distant metastases. The other patient was a 77-year-old female, having locally recurrent liposarcoma of the left lateral chest wall. Chest wall was resected with wide margin of normal tissue, and myocutaneous flaps of latissimus dorsi were used for reconstruction of skin defect (13 x 8 cm and 14 x 10 cm) in both cases. Although additional split-thickness skin graft was required for one of them, myocutaneous flaps were useful for the reconstruction of widely defected chest wall. By using this technique, wider margin can be obtained, which could decrease the risk for local recurrence of malignant tumor.
    Kyobu geka. The Japanese journal of thoracic surgery 01/2001; 53(13):1081-4.
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    ABSTRACT: Although a few reports indicated some benefit to survival, the effect of adjuvant therapy for the patients with resected lung cancer was still controversial. The aim of our study was to evaluate survival advantage of CDDP-based adjuvant therapy compared with short-term immunochemotherapy. Experimental design: prospective randomized trial. Patients: from 1990 through 1994, 94 patients were registered. Forty-seven patients were randomly assigned to each group, i.e., CDDP-based therapy group (CB Group, CDDP+VDS+tegafur+OK-432 or CDDP+OK-432+mediastinal irradiation) or immunochemotherapy group (IC Group, tegafur+OK-432). Patients in both groups were followed at 4-month intervals with the routine follow-up program of our department. No significant difference was observed between the patients' characteristics of two groups. Compliance of the regimen in each group was 79% in CB Group and 85% in IC Group. No treatment-related death was observed. Five-year survival rates of CB Group and IC Group were 49% and 51%, and 5-year disease-free survival rates were 46% and 44%, respectively. There were no statistical differences between the two groups. Furthermore, no survival differences could be found between CB Group and IC Group in any subgroup of patients. Both of these regimens were feasible. However, we have not observed any survival benefit in the CB Group in any subgroup, so far. Induction therapy, new chemotherapeutic agents, or anti-angiogenetic a agents may improve the survival of surgically treated lung cancer patients.
    The Journal of cardiovascular surgery 01/2001; 41(6):935-9. · 1.51 Impact Factor
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    ABSTRACT: A 21-year-old female was admitted to our hospital because of high fever, neck swelling, and dyspnea. She was diagnosed as descending necrotizing mediastinitis (DNM) extended from odontogenic infection. On the day of admission, she underwent cervical drainage. Next day, the CT scan showed an abscess below the tracheal bifurcation and bilateral pleural effusion. Mediastinal drainage was performed through a right thoracotomy, and a left thoracic tube was inserted. Anaerobic Peptostreptococcus was found with bacteriological culture. After the mediastinal drainage, bilateral thoracic irrigation was performed through the thoracic tubes. Left thoracic tube was removed on the 8th day and right one was removed on the 20th day after the thoracotomy. She was discharged on the 42nd day. DNM is relatively rare, but it is lethal disease with high mortality. Immediate and sufficient mediastinal drainage is indispensable for the disease.
    Kyobu geka. The Japanese journal of thoracic surgery 12/2000; 53(12):1058-61.
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    ABSTRACT: We investigated the indications for lung transplantation (LTx) in Japan and discussed questions regarding the current Japanese criteria of LTx. This study examined 37 patients referred to our institute for LTx. Among these patients, there were 11 cases of primary pulmonary hypertension (PPH), 6 of lymphoangiomyomatosis (LAM), 4 of Eisenmenger's syndrome, 3 of bronchiolitis obliterans, 2 each of bronchiectasis, idiopathic pulmonary fibrosis (IPF), and pneumoconiosis, and 7 of other diseases. The most frequent age group was 30-39 years (12 cases, 32.4%), and more than half of the patients were female (22 cases, 59.5%). The regions of residence of the patients were Tohoku (19 patients), Kanto (16), and Chubu (2). Patients were referred from all over eastern Japan. On evaluation, LTx was contraindicated in 5 cases, in 4 of which mechanical ventilation had been installed before consultation with us. Six patients died before registration on the Japan Organ Transplant Network (JOT). 6 transplant candidates were registered with JOT, but one (PPH) died after 6 months of waiting, and one (LAM) received a lung transplant from a brain dead cadaver donor. We propose to reform and clarify the Japanese criteria for LTx-both indications and contraindications, to include such indications as a survival probability of less than two years, and such contraindications as mechanical ventilation. Early consultation at LTx centers was hoped for, in accordance with the International Guidelines and a transplant window.
    Nihon Kokyūki Gakkai zasshi = the journal of the Japanese Respiratory Society. 12/2000; 38(11):839-43.

Publication Stats

2k Citations
416.40 Total Impact Points

Institutions

  • 2002–2006
    • Miyagi University
      Japan
  • 2003
    • Kanazawa Medical University
      • Department of Thoracic Surgery
      Kanazawa-shi, Ishikawa-ken, Japan
  • 1987–2003
    • Tohoku University
      • • Institute of Development, Aging and Cancer
      • • Department of Orthopaedic Surgery
      • • Division of Surgery
      Sendai-shi, Miyagi-ken, Japan
  • 1992–2001
    • Aomori Prefectural Central Hospital
      Aomori, Aomori Prefecture, Japan
  • 1999–2000
    • Sendai City Hospital
      Sendai, Kagoshima, Japan
  • 1992–1993
    • Sendai University
      Sendai, Kagoshima, Japan