Journal of clinical monitoring and computing
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J Clin Monit Comput · Oct 2023
Case ReportsNoninvasive neuromonitoring with rheoencephalography: a case report.
Cerebral blood flow (CBF) autoregulation (AR) can be monitored using invasive modalities, such as intracranial pressure (ICP) and arterial blood pressure (ABP) to calculate the CBF AR index (PRx). Monitoring PRx can reduce the extent of secondary brain damage in patients. Rheoencephalography (REG) is an FDA-approved non-invasive method to measure CBF. ⋯ REG pulse wave morphology changed from poor ICC to good ICC morphology. Bioimpedance recording made it possible to quantify the active/passive status of CBF AR, indicate the worsening of ICC, and present it in real time. REGx can be a suitable, non-invasive alternative to PRx for use in head-injured patients.
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J Clin Monit Comput · Oct 2023
Deep learning classification of capnography waveforms: secondary analysis of the PRODIGY study.
Capnography monitors trigger high priority 'no breath' alarms when CO2 measurements do not exceed a given threshold over a specified time-period. False alarms occur when the underlying breathing pattern is stable, but the alarm is triggered when the CO2 value reduces even slightly below the threshold. True 'no breath' events can be falsely classified as breathing if waveform artifact causes an aberrant spike in CO2 values above the threshold. ⋯ The neural network's accuracy was 0.97, precision was 0.97 and recall was 0.96. Performance was consistent across hospitals in internal-external validation. The neural network could reduce false capnography alarms. Further research is needed to compare the frequency of alarms derived from the neural network with the standard approach.
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J Clin Monit Comput · Oct 2023
Modeling the impacts of assumptions and nonpulmonary factors on the performance and reliability of indices of oxygenation.
Assessment of oxygenation is fundamental to the care of patients. Numerous indices of oxygenation have been developed that entail variable degrees of invasiveness, complexity and physiologic underpinning. The clinical reliability of these indices has been questioned. ⋯ These effects manifested as calculated indices either over or under-estimating actual shunt by FShunt, or wide unpredictable variability (scatter) when correlating A-a [Formula: see text] gradient and Pa:Fi ratio to actual shunt. Cardiac output and oxygen extraction have noticeable impacts on all calculated indices. The results support the clinical observations that the performance of indices of oxygenation can vary with fraction of inspired oxygen and various nonpulmonary physiological factors that underly heterogeneity present in the clinical population.
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J Clin Monit Comput · Oct 2023
Software development to standardize the clinical diagnosis of exercise oscillatory ventilation in heart failure.
Exercise oscillatory ventilation (EOV) is characterized by periodic oscillations of minute ventilation during cardiopulmonary exercise testing (CPET). Despite its prognostic value in chronic heart failure (HF), its diagnosis is complex due to technical limitations. An easier and more accurate way of EOV identification can contribute to a better approach and clinical diagnosis. This study aims to describe a software development to standardize the EOV diagnosis from CPET's raw data in heart failure patients and test its reliability (intra- and inter-rater). ⋯ The present study proposes novel semi-automated software to detect EOV in HF, with high inter and intra-rater agreements. The software project and its tutorial are freely available for download.
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J Clin Monit Comput · Oct 2023
Randomized Controlled TrialEffects of preoperative education using virtual reality on preoperative anxiety and information desire: a randomized clinical trial.
This study aimed to investigate the effect of preoperative education using virtual reality (VR) on preoperative anxiety and information desire. The participants were randomly assigned to the VR group and control group. The VR group received preoperative education using VR content describing preoperative and postoperative processes and their management, and the control group received preoperative education with traditional verbal education. ⋯ Preoperative education using VR effectively reduced preoperative anxiety and information desire. Trial registration CRIS, KCT0007489. Registered 30 June 2022. http://cris.nih.go.kr/cris/ .