| 61. |
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| 62. |
- Johansson, J, et al.
(author)
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Active or passive chest drainage after oesophagectomy in 101 patients : a prospective randomized study
- 1998
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In: British Journal of Surgery. - 0007-1323. ; 85:8, s. 6-1143
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Journal article (peer-reviewed)abstract
- BACKGROUND: This study evaluates the efficiency and safety of two methods of chest drainage after uncomplicated oesophagectomy.METHODS: A prospective randomized study between active suction drainage and passive chest drainage was carried out in 101 patients who underwent gastric pull-up oesophagectomy.RESULTS: No difference in the prevalence of pneumothorax during treatment was noted between the active (nine of 55) and the passive (four of 46) drainage groups (P=0.20). Nor was there any difference in the size (P=0.46) and duration (P=0.53) of the pneumothorax. There was no significant difference in right (P=0.84) and left (P=0.61) basal atelectases and the amounts of right (P=0.10) and left (P=0.24) pleural effusions. There were significantly more basal atelectases (P < 0.001) and pleural effusions (P<0.001) in the non-operated left side compared with the operated right side. Postoperative hospital stay was the same in both groups (median 13 days; P=0.86). The hospital mortality rate was two of 101, and was not affected by the type of drainage.CONCLUSION: Passive drainage did not reduce hospital stay, but was as safe and effective as the active system in draining the pleural cavity after uncomplicated oesophagectomy.
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| 63. |
- Johansson, J, et al.
(author)
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Adenocarcinoma in the distal esophagus with and without Barrett esophagus. Differences in symptoms and survival rates
- 1996
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In: Archives of Surgery. - : American Medical Association (AMA). - 0004-0010. ; 131:7, s. 13-708
-
Journal article (peer-reviewed)abstract
- OBJECTIVE: To evaluate differences in clinical appearance and survival rates in patients operated on for adenocarcinoma in the distal esophagus with and without Barrett epithelium.DESIGN: Prospective clinical study.SETTING: University hospital, Sweden.PATIENTS: Fifty-four patients with adenocarcinoma in the distal esophagus with (n = 17) or without (n = 37) Barrett epithelium.INTERVENTION: Esophagectomy or total gastrectomy.MAIN OUTCOME MEASURES: Preoperative symptoms, endoscopic results, and histological findings; postoperative morbidity, mortality, and survival rates.RESULTS: The main indication for the endoscopic examination that revealed tumor in the group with Barrett esophagus was reflex-related symptoms in 6 patients (routine Barrett examination, n = 4; symptoms of reflux, n = 2), symptoms related to upper gastrointestinal tract bleeding in 6, and malignant symptoms in 5 (dysphagia, n = 4; weight loss, n = 1). In contrast, most patients in the cardia cancer group were admitted because of malignant symptoms (dysphagia, n = 26; epigastric pain, n = 9; and anemia, n = 2). Ten of 17 patients in the Barrett esophagus cancer group had tumors limited to the mucosa and submucosa only. In 1 patient the tumor grew into the muscular layer but not through it. In the remaining 6 patients the tumor did grow through the muscular layer and lymph node metastases were found. Wall penetration was found in 30 patients and metastases to lymph nodes in 29 patients in the cardia cancer group. The hospital mortality rate was 0 of 17 patients in the Barrett cancer group and 2 of 37 patients in the cardia cancer group. In the patients operated on for adenocarcinoma in the distal esophagus, a better long-term survival rate was seen in those with Barrett epithelium (50%) than in those without this metaplasia (10%) (log rank P = .005; X2 = 7.80).CONCLUSIONS: Concomitant Barrett epithelium improved the prognosis for patients with adenocarcinoma in the distal esophagus. Probably the reason for this was a higher rate of early-stage disease, because symptoms of gastroesophageal reflux and other benign disorders, not dysphagia, were most common in patients with adenocarcinoma without Barrett epithelium in the distal esophagus.
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| 64. |
- Johansson, Karl H., et al.
(author)
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Multivariable controller tuning
- 1998
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In: Proceedings of the American Control Conference, 1998. - : IEEE. - 0780345304 ; , s. 3514-3518
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Conference paper (peer-reviewed)abstract
- The problem of tuning individual loops in a multivariable controller is investigated. It is shown how the performance of a specific loop relates to a row in the controller matrix. Several interpretations of this relation are given. An algorithm is also presented that estimates the model required for the tuning via a relay feedback experiment. The algorithm does not need any prior information about the system or the controller. The results are illustrated by an example.
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| 65. |
- Johansson, L.I., et al.
(author)
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Electronic structure of 6H-SiC(0001)
- 1996
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In: Physical Review B (Condensed Matter). - 0163-1829. ; 53:20, s. 13803-13807
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Journal article (peer-reviewed)
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| 66. |
- Johansson, Mats, et al.
(author)
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Fronting in English and Swedish : A text-based contrastive analysis
- 1996
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In: Synchronic Corpus Linguistics : Papers from the Sixteenth International Conference on English Language Research on Computerized Corpora (ICAME 16) - Papers from the Sixteenth International Conference on English Language Research on Computerized Corpora (ICAME 16). - 9042000279 ; 16, s. 29-39
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Conference paper (peer-reviewed)
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| 67. |
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| 68. |
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| 69. |
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| 70. |
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