Coupling of Blood Pressure and Subarachnoid Space Oscillations at Cardiac Frequency Evoked by Handgrip and Cold Tests: A Bispectral Analysis

Gruszecki, Marcin; Tkachenko, Yurii; Kot, Jacek; Radkowski, Marek; Gruszecka, Agnieszka; Basiński, Krzysztof; Waśkow, Monika; Gumiński, Wojciech; Anand, Jacek Sein; Wtorek, Jerzy; Frydrychowski, Andrzej F.; Demkow, Urszula; Winklewski, Paweł J.

doi:10.1007/5584_2018_283

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…Thus, as no other available technique does, the NIR-T/BSS accurately identifies rapid SAS width changes resulting from systole-diastole fluctuations in the cerebral blood volume 20 . Recent analyses have shown that the power spectrum density levels of SAS oscillations are characterized by detectable peaks at both cardiac and respiratory frequencies 21–23 . Taken together, NIR-T/BSS is capable of synchronized assessment of instant cardiac and respiratory influences on SAS width, an exclusive feature of this technique 21–23 .…”

Section: Introductionmentioning

confidence: 99%

Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans

Nuckowska

Gruszecki

Kot

et al. 2019

Sci Rep

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The aim of the study was to assess cardiac and respiratory blood pressure (BP) and subarachnoid space (SAS) width oscillations during the resting state for slow and fast breathing and breathing against inspiratory resistance. Experiments were performed on a group of 20 healthy volunteers (8 males and 12 females; age 25.3 ± 7.9 years; BMI = 22.1 ± 3.2 kg/m 2 ). BP and heart rate (HR) were measured using continuous finger-pulse photoplethysmography. SAS signals were recorded using an SAS monitor. Oxyhaemoglobin saturation (SaO 2 ) and end-tidal CO 2 (EtCO 2 ) were measured using a medical monitoring system. Procedure 1 consisted of breathing spontaneously and at controlled rates of 6 breaths/minute and 6 breaths/minute with inspiratory resistance for 10 minutes. Procedure 2 consisted of breathing spontaneously and at controlled rates of 6, 12 and 18 breaths/minute for 5 minutes. Wavelet analysis with the Morlet mother wavelet was applied for delineation of BP and SAS signals cardiac and respiratory components. Slow breathing diminishes amplitude of cardiac BP and SAS oscillations. The overall increase in BP and SAS oscillations during slow breathing is driven by the respiratory component. Drop in cardiac component of BP amplitude evoked by slow-breathing may be perceived as a cardiovascular protective mechanism to avoid target organ damage. Further studies are warranted to assess long-term effects of slow breathing.

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Section: Introductionmentioning

confidence: 99%

Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans

Nuckowska

Gruszecki

Kot

et al. 2019

Sci Rep

Self Cite

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Comparison of near infrared spectroscopy (NIRS) and near-infrared transillumination-backscattering sounding (NIR-T/BSS) methods

Gruszecka

Gruszecki

Neary

et al. 2020

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The aim of the study was to compare simultaneously recorded a NIR-T/BSS and NIRS signals from healthy volunteers. NIR-T/BSS is a device which give an ability to non-invasively detect and monitor changes in the subarachnoid space width (SAS). Experiments were performed on a group of 30 healthy volunteers (28 males and 2 females, age 30.8 ± 13.4 years, BMI = 24.5 ± 2.3 kg/m2). We analysed recorded signals using analysis methods based on wavelet transform (WT) for the wide frequency range from 0.0095 to 2 Hz. Despite the fact that both devices use a similar radiation source both signals are distinct from each other. We found statistically significant differences for WT amplitude spectra between both signals. Additionally, we showed different relationships of both signals to blood pressure. Collectively, based on the present findings and those of previous studies, we can conclude that the combination of NIR-T/BSS or NIRS signals and time–frequency analysis opens new frontiers in science, and give possibility to understand and diagnosis of various neurodegenerative and ageing related diseases to improve diagnostic procedures and patient prognosis.

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A Scientometric Approach to the Integrated History and Philosophy of Science: Entrenched Biomedical Standardisation and Citation-Exemplar

Yan

Tsai

Huang

2023

International Studies in the Philosophy of Science

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Is Kuhn's notion of exemplar applicable to ongoing biomedical sciences? Many philosophers may be skeptical because Kuhn's cases are mostly from physics and chemistry. However, how do philosophers test the above (non-)applicability directly? We will use examples to illustrate a scientometric approach to the integrated history and philosophy of science (SciHPS) and argue that SciHPS can provide an empirical basis to empirically test and revise a philosophical concept questioned for its applicability to biomedical sciences. This paper will build on Yan, Tsai, and Huang's (2021) heart-rate variability (HRV) case study to examine the biomedical changes within the HRV community from 1970 to 2022. We will investigate how a Task Force standardizes and entrenches methodological standardizations, and argue that some of Task Force's methodological standardizations are tool-afforded by an algorithm. These tool-afforded aspects further explain why an HRV method is robustly dominant in the HRV community despite other HRV scholars having developed alternatives to compete with the dominant one. We will then show how to use SciHPS to empirically test and revise the Kuhnian concept of exemplar into a concept of citation-exemplar that better captures the above tool-afforded aspects of standardizations.

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Coupling of Blood Pressure and Subarachnoid Space Oscillations at Cardiac Frequency Evoked by Handgrip and Cold Tests: A Bispectral Analysis

Cited by 4 publications

References 34 publications

Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans

Impact of slow breathing on the blood pressure and subarachnoid space width oscillations in humans

Comparison of near infrared spectroscopy (NIRS) and near-infrared transillumination-backscattering sounding (NIR-T/BSS) methods

A Scientometric Approach to the Integrated History and Philosophy of Science: Entrenched Biomedical Standardisation and Citation-Exemplar

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