In order to validate cross-correlation analysis between spontaneous slow oscillations of arterial blood pressure (aBP) and intracranial pressure (ICP) or flow velocity as a means to assess the status of cerebral autoregulation continuously, we compared its results with different autoregulation bedside tests. The second aim was to check the method's stability over longer time periods. aBP, ICP, and flow velocity in the middle cerebral artery (FV(MCA)) was measured continuously in 13 critically ill comatose patients. Cross-correlation analysis was performed online and offline between aBP and ICP (CC [aBP --> ICP]) and aBP/FV(MCA) (CC [aBP --> FV(MCA)]). Three different autoregulation bedside tests (cuff deflation, transient hyperemic response, orthostatic hypotension) were performed immediately before a 29-min cross-correlation test period. In addition, continuous cross-correlation autoregulation monitoring was performed over multiple hours (in order to analyze for stability and to assess the influence of other factors). Cluster analysis revealed two main clusters. Cluster 1 (indicative for disturbed autoregulation) showed a centroid at t = -0.21 +/- 3.32 sec, r = 0.43 +/- 0.18 for CC [aBP --> ICP], and t = 0 +/- 3.14 sec, r = 0.44 +/- 0.18 for CC [aBP --> FV(MCA)]. Cluster 2 (indicative for normal autoregulation) revealed a centroid at t = 4.94 +/- 3.74 sec, r =- 0.4 +/- 0.16 for CC [aBP --> ICP], and t = 3.38 +/- 4.44 sec, r = -0.38 +/- 0.18 for CC [aBP --> FV(MCA)]. Comparison between the cross-correlation test results and the bedside tests showed a sensitivity of 44-73% for CC [aBP --> FV(MCA)], whereas CC [aBP --> ICP] was more specific (60-80%). Long-term monitoring revealed stable cross-correlation tests in about 45% of the measurement time. It is concluded that cross-correlation between aBP, ICP, and FV(MCA) is a valid means to monitor the autoregulation status continuously, although further improvement of sensitivity and specificity is needed to make it reliable for clinical decision making.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1089/08977150260337949 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Optimization of erythritol production through fermentation using molasses as carbon source.
Acta Biochim Pol
January 2025
Department of Biotechnology, Indonesia International Institute for Life Sciences, East Jakarta, Indonesia.
Erythritol is a beneficial sugar alcohol that can be used as a sugar substitute for diabetic patients. Erythritol is a bioproduct produced by microorganisms as a response to high osmotic pressure and stress in the growth medium. High concentrations of carbon source substrate can increase the osmotic pressure and provide more nutrient supply for yeast growth and metabolism.
View Article and Find Full Text PDFComparative genomics of thermosynechococcaceae and thermostichaceae: insights into codon usage bias.
Acta Biochim Pol
January 2025
School of Food and Bioengineering, Chengdu University, Chengdu, China.
Members of the families Thermosynechococcaceae and Thermostichaceae are well-known unicellular thermophilic cyanobacteria and a non-thermophilic genus was newly classified into the former. Analysis of the codon usage bias (CUB) of cyanobacterial species inhabiting different thermal and non-thermal niches will benefit the understanding of their genetic and evolutionary characteristics. Herein, the CUB and codon context patterns of protein-coding genes were systematically analyzed and compared between members of the two families.
View Article and Find Full Text PDFChemical tools to define and manipulate interferon-inducible Ubl protease USP18.
Nat Commun
January 2025
Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD, USA.
Ubiquitin-specific protease 18 (USP18) is a multifunctional cysteine protease primarily responsible for deconjugating the interferon-inducible ubiquitin-like modifier ISG15 from protein substrates. Here, we report the design and synthesis of activity-based probes (ABPs) that incorporate unnatural amino acids into the C-terminal tail of ISG15, enabling the selective detection of USP18 activity over other ISG15 cross-reactive deubiquitinases (DUBs) such as USP5 and USP14. Combined with a ubiquitin-based DUB ABP, the USP18 ABP is employed in a chemoproteomics screening platform to identify and assess inhibitors of DUBs including USP18.
View Article and Find Full Text PDFPrognostic value of nighttime blood pressure in patients with chronic kidney disease.
Hypertens Res
January 2025
Department of Nephrology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China.
The optimal blood pressure (BP) in patients with chronic kidney disease (CKD) remains uncertain. Therefore, this cohort study aimed to investigate the prognostic value of ambulatory blood pressure (ABP) in patients with CKD and to determine the optimal range for ABP. In total, 1051 hospitalized patients with CKD were enrolled.
View Article and Find Full Text PDFDetection of hypertension and blood pressure phenotypes using ambulatory blood pressure monitoring in women with past hypertensive disorders of pregnancies.
Pregnancy Hypertens
January 2025
Westmead Applied Research Centre, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia; Department of Cardiology, Westmead Hospital, Sydney, New South Wales, Australia. Electronic address:
Objective: To evaluate the incidence of hypertension and blood pressure (BP) phenotypes using 24-hour ambulatory BP (24hr-ABP) in women with past pregnancy complications who were recruited into a Women's Heart Clinic (WHC).
Study Design: We recruited 156 women aged 30-55 years with past hypertensive disorders of pregnancy (HDP) and/or gestational diabetes (GDM) to a multidisciplinary six-month WHC that provided cardiovascular risk management in Melbourne, Australia. Women were referred for 24 hr-ABP monitoring if clinic BP was ≥130/80 mmHg.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!