Search results for "congestion"

Stability of Positive Systems in WSN Gateway for IoT&IIoT

2020

Modern sensor networks work on the basis of intelligent sensors and actuators, their connection is carried out using conventional or specifically dedicated networks. The efficiency and smooth transmission of such a network is of great importance for the accuracy of measurements, sensor energy savings, or transmission speed. Ethernet in many networks is typically based on the TCP/IP protocol suite. Regardless of whether or not the network transmission is wired or wireless, it should always be reliable. TCP ensures transmission reliability through retransmissions, congestion control and flow control. But TPC is different in networks based on the UDP protocol. The most important here is the tr…

TCP pārblīves vadības algoritma realizācija un testēšana

2015

Pārraides vadības protokols (turpmāk – TCP) ir viens no galvenajiem protokoliem interneta protokolu kopā. Pārblīves vadība ir būtiskākais TCP elements, kurš nosaka tā veiktspēju. Pārblīve ir pārmērīgi intensīva ziņojumu plūsma, kas aizkavē ziņojumu pārsūtīšanu datoru tīklā, nelabvēlīgi ietekmē datoru tīkla veiktspēju un var radīt pārraidāmās informācijas zudumus. Darbā tiek pētīta un aprakstīta TCP pārblīves vadības protokolu izstrāde Unix saimes operētājsistēmā FreeBSD, izmantojot tajā pieejamo modulāro TCP pārblīves vadības ietvaru. Protokolu testēšana tiek veikta IMUNES datortīklu simulācijas vidē, salīdzinot izveidoto protokolu moduļu veiktspēju ar FreeBSD pieejamo pārblīves vadības pro…

Blood Congestion Can Be Rescued by Hemodilution in a Random-Pattern Skin Flap

2017

B-type natriuretic peptide trend predicts clinical significance of worsening renal function in acute heart failure

2019

Aims In acute heart failure (AHF), relationships between changes in B-type natriuretic peptide (BNP) and worsening renal function (WRF) and its prognostic implications have not been fully determined. We investigated the relationship between WRF and a decrease in BNP with in-hospital and 1-year mortality in AHF. Methods and results The Acute Kidney Injury NGAL Evaluation of Symptomatic heart faIlure Study (AKINESIS) was a prospective, international, multicentre study of AHF patients. Severe WRF (sWRF) was a sustained increase of >= 44.2 mu mol/L (0.5 mg/dL) or >= 50% in creatinine, non-severe WRF (nsWRF) was a non-sustained increase of >= 26.5 mu mol/L (0.3 mg/dL) or >= 50% in cr…

Decongestion discriminates risk for one-year mortality in patients with improving renal function in acute heart failure

2021

Aims Improving renal function (IRF) is paradoxically associated with worse outcomes in acute heart failure (AHF), but outcomes may differ based on response to decongestion. We explored if the relationship of IRF with mortality in hospitalized AHF patients differs based on successful decongestion.Methods and results We evaluated 760 AHF patients from AKINESIS for the relationship between IRF, change in B-type natriuretic peptide (BNP), and 1-year mortality. IRF was defined as a >= 20% increase in estimated glomerular filtration rate (eGFR) relative to admission. Adequate decongestion was defined as a >= 40% decrease in last measured BNP relative to admission. IRF occurred in 22% of pat…

CA125-Guided Diuretic Treatment Versus Usual Care in Patients With Acute Heart Failure and Renal Dysfunction

2020

BACKGROUND: The optimal diuretic treatment strategy for patients with acute heart failure and renal dysfunction remains unclear. Plasma carbohydrate antigen 125 (CA125) is a surrogate of fluid overload and a potentially valuable tool for guiding decongestion therapy. The aim of this study was to determine if a CA125-guided diuretic strategy is superior to usual care in terms of short-term renal function in patients with acute heart failure and renal dysfunction at presentation. METHODS: This multicenter, open-label study randomized 160 patients with acute heart failure and renal dysfunction into 2 groups (1:1). Loop diuretics doses were established according to CA125 levels in the CA125-gui…

Lung ultrasound in outpatients with heart failure: the wet‐to‐dry HF study

2021

The Nancy team is supported by the RHU Fight-HF, a public grant overseen by the French National Research Agency (ANR) as part of the second 'Investissements d'Avenir' programme (reference: ANR-15-RHUS-0004), by the French PIA project 'Lorraine Université d'Excellence' (reference: ANR-15-IDEX-04-LUE), the ANR FOCUS-MR (reference: ANR-15-CE14-0032-01), ERA-CVD EXPERT (reference: ANR-16-ECVD-0002-02), the Contrat de Plan Etat Lorraine IT2MP, and FEDER Lorraine. Aims: In ambulatory patients with chronic heart failure (HF), congestion and decongestion assessment may be challenging. The aim of this study is to assess the value of lung ultrasound (LUS) in outpatients with HF in characterizing deco…

Damage to the vascular structures in inguinal hernia specimens.

2012

BACKGROUND: Few scientific reports to date describe the histological modification of structures outlining a hernia opening. This article is focused on the identification of the pathological changes in vascular structures in tissues excised from cadavers with inguinal hernia. A deeper comprehension of this topic could lead to essential improvements in the detection of hernia genesis. MATERIALS AND METHODS: Different kinds of hernia, including indirect, direct and mixed, were identified in 30 autopsied subjects. Tissue samples were resected for histological study from abdominal wall structures close to the hernia opening. Histological examination focused on the detection of structural changes…

Blood urea nitrogen to creatinine ratio is associated with congestion and mortality in heart failure patients with renal dysfunction

2015

Renal dysfunction (RD) and venous congestion are related and common in heart failure (HF). Studies suggest that venous congestion may be the primary driver of RD in HF. In this study, we sought to investigate retrospectively the relationship between common measures of renal function with caval congestion and mortality among outpatients with HF and RD. We reviewed data from 103 HF outpatients (45 males, mean age 74 years, ejection fraction 41.8 ± 11.6 %) with estimated glomerular filtration rate (eGFR) of 25.5 (adjusted OR 2.98, p 0.015) and eGFR ≤45.8 (adjusted OR 5.38, p 0.002) identify patients at risk for caval congestion; a BUN/Cr >23.7 was the best predictor of impaired collapsibility …

Early and personalized ambulatory follow-up to tailor furosemide and fluid intake according to congestion in post-discharge heart failure

2010

Congestive heart failure (CHF) worsening is a worldwide cause of rehospitalization and mortality, specially during the early period after hospitalization. Fluid accumulation plays a key role in the pathophysiology of both acute heart decompensation and disease progression. The effective use of drugs to maintain restored clinical stabilization in recently discharged patients is a difficult task, and it relies on matching the most appropriately tailored therapy to specific clinical profiles. However, no successful treatment has been shown to reduce post-discharge readmission. We evaluated in a case-control study the effectiveness of an early and personalized congestion-guided ambulatory progr…