| 1. |
|
|
| 2. |
- Jung, Christian, et al.
(författare)
-
A comparison of very old patients admitted to intensive care unit after acute versus elective surgery or intervention
- 2019
-
Ingår i: Journal of critical care. - : W B SAUNDERS CO-ELSEVIER INC. - 0883-9441 .- 1557-8615. ; 52, s. 141-148
-
Tidskriftsartikel (refereegranskat)abstract
- Background: We aimed to evaluate differences in outcome between patients admitted to intensive care unit (ICU) after elective versus acute surgery in a multinational cohort of very old patients (80 years; VIP). Predictors of mortality, with special emphasis on frailty, were assessed.Methods: In total, 5063 VIPs were induded in this analysis, 922 were admitted after elective surgery or intervention, 4141 acutely, with 402 after acute surgery. Differences were calculated using Mann-Whitney-U test and Wilcoxon test. Univariate and multivariable logistic regression were used to assess associations with mortality.Results: Compared patients admitted after acute surgery, patients admitted after elective surgery suffered less often from frailty as defined as CFS (28% vs 46%; p < 0.001), evidenced lower SOFA scores (4 +/- 5 vs 7 +/- 7; p < 0.001). Presence of frailty (CFS >4) was associated with significantly increased mortality both in elective surgery patients (7% vs 12%; p = 0.01), in acute surgery (7% vs 12%; p = 0.02).Conclusions: VIPs admitted to ICU after elective surgery evidenced favorable outcome over patients after acute surgery even after correction for relevant confounders. Frailty might be used to guide clinicians in risk stratification in both patients admitted after elective and acute surgery.
|
|
| 3. |
|
|
| 4. |
- Lauten, Juliane, et al.
(författare)
-
Invasive Hemodynamic Characteristics of Low Gradient Severe Aortic Stenosis Despite Preserved Ejection Fraction
- 2013
-
Ingår i: Journal of the American College of Cardiology. - : Elsevier BV. - 0735-1097 .- 1558-3597. ; 61:17, s. 1799-1808
-
Tidskriftsartikel (refereegranskat)abstract
- Objectives The study sought to compare echocardiographic with invasive hemodynamic data in patients with "paradoxic" aortic stenosis and in patients with conventionally defined severe aortic stenosis. Background Controversy exists whether low gradient severe aortic stenosis despite preserved ejection fraction ("paradoxic" aortic stenosis; aortic valve area <1 cm(2), mean gradient <40 mm Hg, ejection fraction >50%), which has been mainly diagnosed by echocardiography (echo), may be largely due to mistakes in echocardiographic measurements. Methods We compared echocardiographic and invasive hemodynamic data from 58 patients (43% male, mean age 77 +/- 5 years) with "paradoxic" aortic stenosis. Data of 22 patients (45% male, mean age 73 +/- 7 years) with conventionally defined severe aortic stenosis area (aortic valve area <= 1 cm(2), mean gradient >40 mm Hg, ejection fraction >= 50%) were also analyzed. Results In patients with "paradoxic" aortic stenosis, orifice area by echo (0.80 +/- 0.15 cm(2)) and catheterization showed modest agreement, whether stroke volume was measured by oxymetry (0.69 +/- 0.16 cm(2), bias 0.14 +/- 0.17 cm(2)), or by thermodilution (0.85 +/- 0.19 cm(2), bias -0.03 +/- 0.19 cm(2)). Mean systolic gradients were very similar (32 +/- 7 mm Hg vs. 31 +/- 6 mm Hg; bias -0.08 +/- 7.8 mm Hg). In comparison, in patients with conventionally defined severe aortic stenosis, orifice area by echo was 0.72 +/- 0.17 cm(2) and by catheterization 0.51 +/- 0.15 cm(2) (oxymetry) and 0.68 +/- 0.21 cm(2) (thermodilution), respectively, and mean systolic gradient 51 +/- 10 mm Hg and 55 +/- 8 mm Hg, respectively. Ejection fractions did not differ significantly in both groups. Ascending aortic diameter was significantly smaller in the "paradoxic" aortic stenosis group than in patients with conventionally defined severe aortic stenosis (28 +/- 5 mm vs. 31 +/- 5 mm), and energy loss index was significantly larger (0.51 +/- 0.12 cm(2)/m(2) vs. 0.42 +/- 0.09 cm(2)/m(2), respectively). Heart rate and mean blood pressure during echo and catheterization were not significantly different. Conclusions Occurrence of low gradient severe aortic stenosis despite preserved ejection fraction was confirmed by invasive hemodynamics and was not the result of a systematic bias in the echo calculation of aortic orifice area.
|
|
| 5. |
|
|
| 6. |
- Schneider, E, et al.
(författare)
-
CD73-mediated adenosine production by CD8 T cell-derived extracellular vesicles constitutes an intrinsic mechanism of immune suppression
- 2021
-
Ingår i: Nature communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 12:1, s. 5911-
-
Tidskriftsartikel (refereegranskat)abstract
- Immune cells at sites of inflammation are continuously activated by local antigens and cytokines, and regulatory mechanisms must be enacted to control inflammation. The stepwise hydrolysis of extracellular ATP by ectonucleotidases CD39 and CD73 generates adenosine, a potent immune suppressor. Here we report that human effector CD8 T cells contribute to adenosine production by releasing CD73-containing extracellular vesicles upon activation. These extracellular vesicles have AMPase activity, and the resulting adenosine mediates immune suppression independently of regulatory T cells. In addition, we show that extracellular vesicles isolated from the synovial fluid of patients with juvenile idiopathic arthritis contribute to T cell suppression in a CD73-dependent manner. Our results suggest that the generation of adenosine upon T cell activation is an intrinsic mechanism of human effector T cells that complements regulatory T cell-mediated suppression in the inflamed tissue. Finally, our data underscore the role of immune cell-derived extracellular vesicles in the control of immune responses.
|
|
| 7. |
|
|
| 8. |
|
|
