Effect of anesthesia induction on cerebral tissue oxygen saturation in hypertensive patients: an observational study

Taşkaldıran, Yasin; Şen, Özlem; Aşkın, Tuğba; Ünver, Süheyla

doi:10.1016/j.bjane.2021.02.010

Cited by 3 publications

(3 citation statements)

References 29 publications

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“…The following reasons may explain this result. First, hypertensive patients have impaired automatic blood pressure regulation and are more likely to develop hypotension after general anesthesia induction ( 17 ). Second, hypertensive patients have much lower venous compliance than those with normal blood pressure ( 18 ).…”

Section: Discussionmentioning

confidence: 99%

Maximum inferior vena cava diameter predicts post-induction hypotension in hypertensive patients undergoing non-cardiac surgery under general anesthesia: A prospective cohort study

Zhang

Gao²,

Xiang³

et al. 2022

Front. Cardiovasc. Med.

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BackgroundInferior vena cava (IVC) ultrasonography is a reliable variable that predicts post-induction hypotension (PIH) in patients undergoing surgery under general anesthesia. However, in patients with hypertension, the predictive performance of ultrasound IVC measurements needs further exploration.MethodsThis is a prospective cohort study. Adult patients with existing hypertension scheduled to undergo non-cardiac surgery under general anesthesia were eligible. An abdominal ultrasound examination was conducted immediately prior to anesthesia induction (0.03 mg kg–1 midazolam, 0.3 mg kg–1 etomidate, 0.4 μg kg–1 sufentanil, and 0.6 mg kg–1 rocuronium). IVC collapsibility index (IVC-CI) was calculated as (dIVCmax–dIVCmin)/dIVCmax, where dIVCmax and dIVCmin represent the maximum and minimum IVC diameters at the end of expiration and inspiration, respectively. PIH was defined as a reduction of mean arterial pressure (MAP) by >30% of the baseline or to <60 mmHg within 10 min after endotracheal intubation. The diagnostic performance of IVC-CI, dIVCmax, and dIVCmin in predicting PIH was also examined in a group of normotensive patients receiving non-cardiac surgery under the same anesthesia protocol.ResultsA total of 51 hypertensive patients (61 ± 13 years of age, 31 women) and 52 normotensive patients (42 ± 13 years of age, 35 women) were included in the final analysis. PIH occurred in 33 (64.7%) hypertensive patients and 19 (36.5%) normotensive patients. In normotensive patients, the area under the receiver operating curve (AUC) in predicting PIH was 0.896 (95% confidence interval [CI]: 0.804–0.987) for IVC-CI, 0.770 (95% CI: 0.633–0.908) for dIVCmax, and 0.868 (95% CI: 0.773–0.963) for dIVCmin. In hypertensive patients, the AUC in predicting PIH was 0.523 (95% CI: 0.354–0.691) for IVC-CI, 0.752 (95% CI: 0.621–0.883) for dIVCmax, and 0.715 (95% CI: 0.571–0.858) for dIVCmin. At the optimal cutoff (1.24 cm), dIVCmax had 54.5% (18/33) sensitivity and 94.4% (17/18) specificity.ConclusionIn hypertensive patients, IVC-CI is unsuitable for predicting PIH, and dIVCmax is an alternative measure with promising performance.Clinical trial registration[http://www.chictr.org.cn/], identifier [ChiCTR2000034853].

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Section: Discussionmentioning

confidence: 99%

Maximum inferior vena cava diameter predicts post-induction hypotension in hypertensive patients undergoing non-cardiac surgery under general anesthesia: A prospective cohort study

Zhang

Gao²,

Xiang³

et al. 2022

Front. Cardiovasc. Med.

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“…Based on the three hypotheses of CSI, the DeepFi system architecture includes an offline training phase and an online positioning phase [ 4 ]. At present, in the study of brain tissue oxygen saturation, Takadran et al aim to use near-infrared spectroscopy to evaluate the brain tissue oxygen saturation of hypertensive patients after anesthesia induction and to determine whether these patients have impaired brain tissue oxygen saturation [ 5 ]. Oxygen is necessary for the nutrition of living cells of the human body, and insufficient oxygen supply can damage human tissues, leading to hypoxia and loss of consciousness.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Rso2 and PI Monitoring Images on the Treatment of Premature Infants Based on Deep Learning

Liu

et al. 2022

Computational and Mathematical Methods in Medicine

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In recent years, due to the combined effects of individual behavior, psychological factors, environmental exposure, medical conditions, biological factors, etc., the incidence of preterm birth has gradually increased, so the incidence of various complications of preterm infants has also become higher and higher. This article is aimed at studying the therapeutic effects of preterm infants and proposing the application of rSO2 and PI image monitoring based on deep learning to the treatment of preterm infants. This article introduces deep learning, blood perfusion index, preterm infants, and other related content in detail and conducts experiments on the treatment of rSO2 and PI monitoring images based on deep learning in preterm infants. The experimental results show that the rSO2 and PI monitoring images based on deep learning can provide great help for the treatment of preterm infants and greatly improve the treatment efficiency of preterm infants by at least 15%.

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“…Similar results during LOC were reported by others. Park et al 16 reported that StO 2 increased by 5% to 6%, Taskaldiran et al reported an StO 2 increase of 4%, 98 Valencia et al 9% increase, 44 and Kim et al, 10% increase. 99 Conversely, an StO 2 decrease of 2% to 5% was reported by others, 100,101 which would lead to an increase in OEF.…”

Section: Discussionmentioning

confidence: 97%

Comparison of cerebral metabolic rate of oxygen, blood flow, and bispectral index under general anesthesia

et al. 2023

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Significance: The optical measurement of cerebral oxygen metabolism was evaluated.Aim: Compare optically derived cerebral signals to the electroencephalographic bispectral index (BIS) sensors to monitor propofol-induced anesthesia during surgery.Approach: Relative cerebral metabolic rate of oxygen (rCMRO 2 ) and blood flow (rCBF) were measured by time-resolved and diffuse correlation spectroscopies. Changes were tested against the relative BIS (rBIS) ones. The synchronism in the changes was also assessed by the R-Pearson correlation.Results: In 23 measurements, optically derived signals showed significant changes in agreement with rBIS: during propofol induction, rBIS decreased by 67% [interquartile ranges (IQR) 62% to 71%], rCMRO 2 by 33% (IQR 18% to 46%), and rCBF by 28% (IQR 10% to 37%). During recovery, a significant increase was observed for rBIS (48%, IQR 38% to 55%), rCMRO 2 (29%, IQR 17% to 39%), and rCBF (30%, IQR 10% to 44%). The significance and direction of the changes subject-by-subject were tested: the coupling between the rBIS, rCMRO 2 , and rCBF was witnessed in the majority of the cases (14/18 and 12/18 for rCBF and 19/21 and 13/18 for rCMRO 2 in the initial and final part, respectively). These changes were also correlated in time (R > 0.69 to R ¼ 1, p-values < 0.05).Conclusions: Optics can reliably monitor rCMRO 2 in such conditions.

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Effect of anesthesia induction on cerebral tissue oxygen saturation in hypertensive patients: an observational study

Cited by 3 publications

References 29 publications

Maximum inferior vena cava diameter predicts post-induction hypotension in hypertensive patients undergoing non-cardiac surgery under general anesthesia: A prospective cohort study

Maximum inferior vena cava diameter predicts post-induction hypotension in hypertensive patients undergoing non-cardiac surgery under general anesthesia: A prospective cohort study

The Effects of Rso2 and PI Monitoring Images on the Treatment of Premature Infants Based on Deep Learning

Comparison of cerebral metabolic rate of oxygen, blood flow, and bispectral index under general anesthesia

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