| 21. |
- Sjögren, Johan, et al.
(författare)
-
Vakuumassisterad sår- behandling ger goda kliniska resultat God läkning vid komplicerade sår--djupa sternuminfektioner ett exempel.
- 2008
-
Ingår i: Läkartidningen. - 0023-7205. ; 105:40, s. 2773-2776
-
Tidskriftsartikel (refereegranskat)abstract
- acuum-assisted closure (V.A.C.®) is a novel treatment for wound healing, which has been used extensively during the last years in a growing number of clinical applications. This wound-healing technique is based on the application of local negative pressure to a wound. During treatment with vacuum-assisted closure, several beneficial wound healing mechanisms are initiated. Topical negative pressure increases the microvascular blood flow in the surrounding tissue and reduces wound tissue oedema and wound size. Furthermore, the stimulation of growth factors and neoangiogenesis facilitates the formation of granulation tissue in the wound. Vacuum-assisted closure has been widely adopted as a standard treatment for deep sternal wound infections following cardiac surgery since topical negative pressure combines several advantageous features from conventional surgical techniques. However, although it is effective, vacuum-assisted closure must always be used in combination with proper surgical revision and adequate antibiotic therapy in order to obtain optimal results.
|
|
| 22. |
- Torbrand, Christian, et al.
(författare)
-
Pressure transduction to the thoracic cavity during topical negative pressure therapy of a sternotomy wound.
- 2008
-
Ingår i: International Wound Journal. - 1742-481X. ; 5:4, s. 579-584
-
Tidskriftsartikel (refereegranskat)abstract
- The present study was performed to examine pressure transduction to the thoracic cavity during topical negative pressure (TNP) therapy of a sternotomy wound. Seven pigs underwent median sternotomy. Pressure transduction catheters were placed on the anterior surface of the heart (under the foam), in the pericardium (under the heart), in the left pleura and in the oesophagus at the level of the heart. The wound was sealed as for TNP therapy. The vacuum source was set to deliver negative pressures between -50 and -200 mmHg. The pressure on the anterior surface of the heart changed in a linear relationship with the applied negative pressure and was slightly lower than the applied negative pressure (-102 +/- 9 mmHg at delivered -125 mmHg). Further down in the thoracic cavity, in the pericardium (under the heart), in the left pleura and in the oesophagus, the wound pressure was only slightly affected by TNP therapy. In conclusion during TNP therapy, negative pressure is effectively transmitted to anterior portions of the heart. This may explain our recent findings that TNP increases microvascular blood flow in the myocardium. The pressure difference between the anterior and the posterior portions of the heart causes the right ventricle to be sucked up towards the posterior parts of the sternum, where it might be exposed to the sharp edges of the sternal bone, which may result in heart injury.
|
|
| 23. |
- Robinson, Yohan, 1977, et al.
(författare)
-
Intravascular hemolysis and mean red blood cell age in athletes.
- 2006
-
Ingår i: Medicine and science in sports and exercise. - : Ovid Technologies (Wolters Kluwer Health). - 0195-9131 .- 1530-0315. ; 38:3, s. 480-3
-
Tidskriftsartikel (refereegranskat)abstract
- Since the observation that mechanical stress causes red blood cell (RBC) destruction, foot-strike hemolysis has been used to explain sports anemia and RBC rejuvenation in athletes. Recently gained knowledge questions the importance of mechanical RBC trauma on RBC hemolysis in athletes.Male athletes (N = 90) and untrained male controls (N = 58) were investigated for aerobic performance, hematological parameters, serum erythropoietin concentration (EPO), soluble transferrin receptor concentration (sTFR), and erythrocyte aspartate aminotransferase activity (eAST).On hard floor running disciplines (HFR, N = 26, short- and long-distance runners, triathletes) showed a lower eAST (P < 0.001) and thus no younger RBC population than not on hard floor running athletes (NHFR, N = 64, cyclists, soccer players, others) or the untrained control group (N = 58). HFR had higher but still normal EPO (P < 0.01) and no higher sTFR.Because intravascular hemolysis occurs in swimmers, cyclists, and runners, and mean RBC age is not reduced in runners, mechanisms other than foot-strike hemolysis have to be considered as well. Possible reasons are intramuscular destruction, osmotic stress, and membrane lipid peroxidation caused by free radicals released by activated leukocytes. Intravascular hemolysis can even be regarded as physiological means to provide heme and proteins for muscle growth.
|
|
| 24. |
- Ekelund, Ulf, et al.
(författare)
-
New methods for improved evaluation of patients with suspected acute coronary syndrome in the emergency department.
- 2008
-
Ingår i: Postgraduate Medical Journal. - : BMJ. - 1469-0756 .- 1472-0205 .- 1472-0213. ; 84:988, s. 83-86
-
Tidskriftsartikel (refereegranskat)abstract
- This paper aims to identify and review new and unproven emergency department (ED) methods for improved evaluation in cases of suspected acute coronary syndrome (ACS). Systematic news coverage through PubMed from 2000 to 2006 identified papers on new methods for ED assessment of patients with suspected ACS. Articles found described decision support models, new ECG methods, new biomarkers and point-of-care testing, cardiac imaging, immediate exercise tests and the chest pain unit concept. None of these new methods is likely to be the perfect solution, and the best strategy today is therefore a combination of modern methods, where the optimal protocol depends on local resources and expertise. With a suitable combination of new methods, it is likely that more patients can be managed as outpatients, that length of stay can be shortened for those admitted, and that some patients with ACS can get earlier treatment.
|
|
| 25. |
|
|
| 26. |
- Li, Cairu, et al.
(författare)
-
Ability of physical activity measurements to assess health-related risks.
- 2009
-
Ingår i: European Journal of Clinical Nutrition. - : Springer Science and Business Media LLC. - 1476-5640 .- 0954-3007. ; 63, s. 1448-1451
-
Tidskriftsartikel (refereegranskat)abstract
- The aim of this study is to evaluate if two different physical activity (PA) questionnaires have similar ability to rank individuals, and to examine associations with cardiovascular-metabolic risk factors, compared to an objective measure. In a random sample (n=369, age: 65+/-6 years) from the population-based 'Malmö Diet and Cancer' (MDC) cohort, PA was measured by a leisure-time comprehensive questionnaire (MDC-score), a simple leisure-time questionnaire and by accelerometer-monitoring (CSA). Moderate correlations were observed between MDC-score and CSA in men and women (r=0.35 and 0.24, respectively). In men, both questionnaires and CSA were inversely associated with waist circumference, insulin resistance and metabolic syndrome. In women, the MDC-score was positively associated with high-density lipoprotein-cholesterol, and the simple questionnaire inversely associated with anthropometric indexes, but no association was seen between PA estimates and cardiovascular components. We conclude that both PA questionnaires distinguish health risks associated with anthropometric-metabolic risk factors, particularly in men.European Journal of Clinical Nutrition advance online publication, 29 July 2009; doi:10.1038/ejcn.2009.69.
|
|
| 27. |
- Lönnerholm, Gudmar, et al.
(författare)
-
In vitro cellular drug sensitivity at diagnosis is correlated to minimal residual disease at end of induction therapy in childhood acute lymphoblastic leukemia.
- 2009
-
Ingår i: Leukemia research. - Oxford : Elsevier BV. - 0145-2126 .- 1873-5835. ; 33:1, s. 46-53
-
Tidskriftsartikel (refereegranskat)abstract
- Leukemic cells from 85 children with newly diagnosed precursor B-lineage ALL were tested for in vitro drug sensitivity to a panel of anti-cancer drugs. Minimal residual disease (MRD) was measured by RQ-PCR. There was a significant correlation between MRD day 29 and in vitro sensitivity to prednisolone (p<0.001) and doxorubicin (p=0.017), drugs administered during induction therapy. In patients with t(12;21) (n=20), in vitro sensitivity to doxorubicin was an independent factor for MRD <0.1% (p=0.031; R(2)=0.66). Thus, data show that in vitro drug sensitivity at diagnosis is correlated to cell kill during induction therapy as measured by MRD day 29.
|
|
| 28. |
- Newton-Cheh, Christopher, et al.
(författare)
-
Genome-wide association study identifies eight loci associated with blood pressure
- 2009
-
Ingår i: Nature Genetics. - : Springer Science and Business Media LLC. - 1546-1718 .- 1061-4036. ; 41:6, s. 666-676
-
Tidskriftsartikel (refereegranskat)abstract
- Elevated blood pressure is a common, heritable cause of cardiovascular disease worldwide. To date, identification of common genetic variants influencing blood pressure has proven challenging. We tested 2.5 million genotyped and imputed SNPs for association with systolic and diastolic blood pressure in 34,433 subjects of European ancestry from the Global BPgen consortium and followed up findings with direct genotyping (N <= 71,225 European ancestry, N <= 12,889 Indian Asian ancestry) and in silico comparison (CHARGE consortium, N 29,136). We identified association between systolic or diastolic blood pressure and common variants in eight regions near the CYP17A1 (P = 7 x 10(-24)), CYP1A2 (P = 1 x 10(-23)), FGF5 (P = 1 x 10(-21)), SH2B3 (P = 3 x 10(-18)), MTHFR (P = 2 x 10(-13)), c10orf107 (P = 1 x 10(-9)), ZNF652 (P = 5 x 10(-9)) and PLCD3 (P = 1 x 10(-8)) genes. All variants associated with continuous blood pressure were associated with dichotomous hypertension. These associations between common variants and blood pressure and hypertension offer mechanistic insights into the regulation of blood pressure and may point to novel targets for interventions to prevent cardiovascular disease.
|
|
| 29. |
- Nordahl, Emma, et al.
(författare)
-
Domain 5 of high molecular weight kininogen is antibacterial.
- 2005
-
Ingår i: Journal of Biological Chemistry. - 1083-351X. ; 280:41, s. 34832-34839
-
Tidskriftsartikel (refereegranskat)abstract
- Antimicrobial peptides are important effectors of the innate immune system. These peptides belong to a multifunctional group of molecules that apart from their antibacterial activities also interact with mammalian cells and glycosaminoglycans and control chemotaxis, apoptosis, and angiogenesis. Here we demonstrate a novel antimicrobial activity of the heparin-binding and cell-binding domain 5 of high molecular weight kininogen. Antimicrobial epitopes of domain 5 were characterized by analysis of overlapping peptides. A peptide, HKH20 (His(479) - His(498)), efficiently killed the Gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa and the Gram-positive Enterococcus faecalis. Fluorescence microscopy and electron microscopy demonstrated that HKH20 binds to and induces breaks in bacterial membranes. Furthermore, no discernible hemolysis or membrane-permeabilizing effects on eukaryotic cells were noted. Proteolytic degradation of high molecular weight kininogen by neutrophil-derived proteases as well as the metalloproteinase elastase from P. aeruginosa yielded fragments comprising HKH20 epitopes, indicating that kininogen-derived antibacterial peptides are released during proteolysis.
|
|
| 30. |
- Pasupuleti, Mukesh, et al.
(författare)
-
Preservation of Antimicrobial Properties of Complement Peptide C3a, from Invertebrates to Humans
- 2007
-
Ingår i: Journal of Biological Chemistry. - 0021-9258 .- 1083-351X. ; 282:4, s. 2520-2528
-
Tidskriftsartikel (refereegranskat)abstract
- The human anaphylatoxin peptide C3a, generated during complement activation, exerts antimicrobial effects. Phylogenetic analysis, sequence analyses, and structural modeling studies paired with antimicrobial assays of peptides from known C3a sequences showed that, in particular in vertebrate C3a, crucial structural determinants governing antimicrobial activity have been conserved during the evolution of C3a. Thus, regions of the ancient C3a from Carcinoscorpius rotundicauda as well as corresponding parts of human C3a exhibited helical structures upon binding to bacterial lipopolysaccharide permeabilized liposomes and were antimicrobial against Gram-negative and Gram-positive bacteria. Human C3a and C4a (but not C5a) were antimicrobial, in concert with the separate evolutionary development of the chemotactic C5a. Thus, the results demonstrate that, notwithstanding a significant sequence variation, functional and structural constraints imposed on C3a during evolution have preserved critical properties governing antimicrobial activity.
|
|
