| 121. |
- Nilsson, Hans-Olof, et al.
(författare)
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Identification of Helicobacter pylori and other Helicobacter species by PCR, hybridization, and partial DNA sequencing in human liver samples from patients with primary sclerosing cholangitis or primary biliary cirrhosis
- 2000
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Ingår i: Journal of Clinical Microbiology. - 1098-660X. ; 38:3, s. 1072-1076
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Tidskriftsartikel (refereegranskat)abstract
- Helicobacter pylori was identified in human liver tissue by PCR, hybridization, and partial DNA sequencing. Liver biopsies were obtained from patients with primary sclerosing cholangitis (n = 12), primary biliary cirrhosis (n = 12), and noncholestatic liver cirrhosis (n = 13) and (as controls) normal livers (n = 10). PCR analyses were carried out using primers for the Helicobacter genus, Helicobacter pylori (the gene encoding a species-specific 26-kDa protein and the 16S rRNA), Helicobacter bilis, Helicobacter pullorum, and Helicobacter hepaticus. Samples from patients with primary biliary cirrhosis and primary sclerosing cholangitis (11 and 9 samples, respectively) were positive by PCR with Helicobacter genus-specific primers. Of these 20 samples, 8 were positive with the 16S rRNA primer and 9 were positive with the 26-kDa protein primer of H. pylori. These nine latter samples were also positive by Southern blot hybridization for the amplified 26-kDa fragment, and four of those were verified to be H. pylori by partial 16S rDNA sequencing. None of the samples reacted with primers for H. bilis, H. pullorum, or H. hepaticus. None of the normal livers had positive results in the Helicobacter genus PCR assay, and only one patient in the noncholestatic liver cirrhosis group, a young boy who at reexamination showed histological features suggesting primary sclerosing cholangitis, had a positive result in the same assay. Helicobacter positivity was thus significantly more common in patients with cholestatic diseases (20 of 24) than in patients with noncholestatic diseases and normal controls (1 of 23) (P = <0.00001). Patients positive for Helicobacter genus had significantly higher values of alkaline phosphatases and prothrombin complex than Helicobacter-negative patients (P = 0.0001 and P = 0.0003, respectively). Among primary sclerosing cholangitis patients, Helicobacter genus PCR positivity was weakly associated with ulcerative colitis (P = 0.05). Significant differences related to blood group or HLA status were not found.
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| 122. |
- Nilsson, Håkan, et al.
(författare)
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Pharyngeal constrictor paresis: an indicator of neurologic disease?
- 1993
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Ingår i: Dysphagia. - 1432-0460. ; 8:3, s. 239-243
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Tidskriftsartikel (refereegranskat)abstract
- Pharyngeal constrictor paresis (PHCP) is sometimes found in videoradiography of the swallowing act in patients complaining of dysphagia. Ten patients with PHCP and 10 dysphagic, age- and sex-matched controls with normal videoradiography were neurologically evaluated and examined with magnetic resonance imaging (MRI) of the brain and brainstem in order to learn the pathogenetic process behind PHCP. The study revealed 8 PHCP patients and 1 dysphagic control with abnormal clinical neurological findings such as myopathy, cerebrovascular disease, or extrapyramidal disease. The neurological examination revealed considerable information of prognostic and therapeutic value in PHCP patients. The MRI was abnormal in 7 PHCP patients and 4 dysphagic controls. However, the findings in MRI were nonspecific but the examination was found to be valuable in selected cases. It is concluded that PHCP is an indicator of neurological disease and accordingly, such patients should be examined by a neurologist to establish the cause of the disease.
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| 123. |
- Nilsson, Håkan, et al.
(författare)
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Quantitative aspects of swallowing in an elderly nondysphagic population
- 1996
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Ingår i: Dysphagia. - 1432-0460. ; 11:3, s. 180-184
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Tidskriftsartikel (refereegranskat)abstract
- The prevalence of swallowing impairment increases with age and is a major health care problem in the elderly. It has been assumed that age-related changes in nerves and muscles hamper muscle strength and coordination of swallowing. However, it is unclear what impairment is related to primary aging and what is the consequence of diseases prevalent in the elderly (secondary aging). In order to quantify swallowing in nondysphagic elderly we used the noninvasive ROSS (Repetitive Oral Suction Swallow) test. A total of 53 individuals aged 76 +/- 5 years (mean +/- SD) were examined. We found that the nondysphagic elderly demonstrated significant differences compared with young individuals in 10 of 17 measured variables, i.e., decreased peak suction pressure, increased frequency of multiple swallows after one ingestion, increased frequency of polyphasic laryngeal movements, increased frequency of inspiration after swallowing, and increased frequency of coughing during or after swallowing. Therefore, primary aging mainly seems to influence coordination of swallowing, but oral and pharyngeal swallow per se seem to be unaffected.
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| 124. |
- Nilsson, Håkan, et al.
(författare)
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Quantitative assessment of oral and pharyngeal function in Parkinson's disease
- 1996
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Ingår i: Dysphagia. - 1432-0460. ; 11:2, s. 144-150
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Tidskriftsartikel (refereegranskat)abstract
- Oral and pharyngeal dysfunction is common in Parkinson's disease. To reveal the frequency of swallowing dysfunction and correlate swallowing dysfunction with locomotor disturbances, we studied 75 patients with Parkinson's disease staged I-IV according to the Hoehn and Yahr score. We assessed oral and pharyngeal swallow during optimal medication by a quantitative test of swallowing (the ROSS test) measuring the suction pressure, bolus volume, swallowing capacity, and time for important events in the swallowing cycle. We found abnormal results in 7/12 patients (58%) in stage 1 of the Hoehn and Yahr score, in 13/14 patients (93%) in stage 2, in 29/32 patients (91%) in stage 3, and in 16/17 patients (94%) in stage 4. Abnormal test results in stages, 1, 2, and 3 were seldom related to swallowing difficulties noticed by the patients. In advanced disease (Hoehn and Yahr stage 4), the abnormal results were often considerable, with swallowing difficulties obvious to the patient. Two of 17 patients coughed during or immediately after the test and 3/ 17 patients were unable to complete the test. The degree of swallowing disturbance increased during stress (forced, repetitive swallow). The Hoehn and Yahr score and the results in the ROSS test did not correlate, indicating that swallowing disturbances are due to nondopaminergic degeneration. Silent swallowing impairment may interfere with the nutrition and quality of life in Parkinson's disease, thus it is of interest to monitor this in clinical practice.
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| 125. |
- Nilsson, Håkan, et al.
(författare)
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Quantitative assessment of swallowing in healthy adults
- 1996
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Ingår i: Dysphagia. - 1432-0460. ; 11:2, s. 110-116
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Tidskriftsartikel (refereegranskat)abstract
- Swallowing has hitherto been evaluated during physical examination, radiologic barium studies, manometry, and cervical auscultation. Radiography principally demonstrates qualitative aspects of oral and pharyngeal function, whereas quantitative aspects have primarily been documented by manometry. To evaluate swallowing quantitatively, without using invasive methods or radiation, we have applied a combined test of water drinking, i.e., the Repetitive Oral Suction Swallow test (ROSS). The test provides reliable measurements of suction pressure, bolus volume, timing of important events in oral and pharyngeal swallow, and respiration. The test is described and results from 292 healthy, non-dysphagic subjects are presented. We found a mean bolus volume of 25.6 +/- 8.5 ml during single swallow and 21.1 +/- 8.2 ml during stress (forced, repetitive swallow). During forced, repetitive swallow, the bolus volume was more strongly associated with suction time (r2 = 0.55) than with peak suction pressure (r2 = 0.04), indicating that suction time is more important than suction pressure in determining the bolus volume. The oral-pharyngeal transit time decreased: single swallow 0.56 +/- 0.36 sec, forced repetitive swallow 0.23 +/- 0.11 sec, as did the coefficient of variation (48% and 64%, respectively) indicating a more automatic neural process for pharyngeal function in forced, repetitive swallow. The postswallow respiration started with inspiration in 10% of studied individuals, but did not correlate with deviations in other variables in the test. Thus, postswallow inspiration must be considered as normal. The ROSS test offers a rapid and easy quantitative assessment of swallowing.
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| 126. |
- Nilsson, Håkan, et al.
(författare)
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Swallowing in hereditary sensory ataxia
- 1996
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Ingår i: Dysphagia. - 1432-0460. ; 11:2, s. 140-143
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Tidskriftsartikel (refereegranskat)abstract
- The oral, pharyngeal, and esophageal stages of swallowing were evaluated in 8 patients with recessively or dominantly inherited pure sensory ataxia. Six patients had swallowing difficulties: solid bolus obstruction, coughs during eating, and choking episodes. One patient had chronic bronchitis and another had recurrent pneumonia. The patients underwent a biphasic radiological barium swallow, including videofluoroscopy. No patient had a completely normal swallow. All had normal oral function, whereas pharyngeal function was abnormal in 6 patients. Esophageal function was abnormal in 6 patients. The swallowing dysfunction did not correlate with the severity of motor or sensory dysfunction in the limbs, nor with age or duration of ataxia. Our study shows that swallowing dysfunction is common in hereditary sensory ataxia. This dysfunction is likely to be due to involvement of the nucleus of the solitary tract in the brainstem. Despite some of the patients having suffered from choking episodes and others from bronchopulmonary complications, they did not spontaneously admit dysphagia. Swallowing should be evaluated thoroughly in patients with hereditary sensory ataxia since dysphagia in these patients might bring serious and potentially fatal complications.
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| 127. |
- Nilsson, Klas, et al.
(författare)
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Experimental Industrial Robotics
- 1996
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Ingår i: Conference on Decision and Control. ; , s. 3904-3909
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Konferensbidrag (refereegranskat)
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| 128. |
- Nyberg, Lars, et al.
(författare)
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New data sources for cloudburst risk assessment and management
- 2022
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Ingår i: Vatten: tidskrift för vattenvård /Journal of Water Management and research. - 0042-2886. ; 78:2
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Urban flooding causes large societal damages and increased climate adaptation measures is needed. Therapid and local character of extreme rain events make them difficult to observe and predict, and to issuewarnings for. There is also a lack of data on urban flood damages, mainly because of scarce and nonsystematic data collection and management. In this paper, we present the approaches behind the new research project SPARC. The overarching aim of the project is to improve urban rain safety by establishinga participatory system for crowdsourcing of data, to support urban flood risk modelling and adaptation ofcities to intense rainfall. The project will also investigate flood damage mechanisms on the built environment as well as evaluate and communicate small-scale adaptation measures. Municipal water and wastewater utility organizations and insurance industry representatives will be included in a trans-disciplinaryprocess, also including crowdsourcing in a citizen science approach.
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| 129. |
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| 130. |
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