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  • 1
    In: Shock, Ovid Technologies (Wolters Kluwer Health), Vol. 42, No. 2 ( 2014-08), p. 121-128
    Type of Medium: Online Resource
    ISSN: 1073-2322
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2014
    detail.hit.zdb_id: 2011863-6
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  • 2
    In: BMC Anesthesiology, Springer Science and Business Media LLC, Vol. 20, No. 1 ( 2020-12)
    Abstract: Balanced anaesthesia with propofol and remifentanil, compared to sufentanil, often decreases mean arterial pressure (MAP), heart rate (HR) and cardiac index (CI), raising concerns on tissue-oxygenation. This distinct haemodynamic suppression might be attenuated by atropine. This double blinded RCT, investigates if induction with propofol-sufentanil results in higher CI and tissue-oxygenation than with propofol-remifentanil and if atropine has more pronounced beneficial effects on CI and tissue-oxygenation in a remifentanil-based anaesthesia. Methods In seventy patients scheduled for coronary bypass grafting (CABG), anaesthesia was induced and maintained with propofol target controlled infusion (TCI) with a target effect-site concentration (Cet) of 2.0 μg ml − 1 and either sufentanil (TCI Cet 0.48 ng ml − 1 ) or remifentanil (TCI Cet 8 ng ml − 1 ). If HR dropped below 60 bpm, methylatropine (1 mg) was administered intravenously. Relative changes (∆) in MAP, HR, stroke volume (SV), CI and cerebral (SctO 2 ) and peripheral (SptO 2 ) tissue-oxygenation during induction of anaesthesia and after atropine administration were analysed. Results The sufentanil group compared to the remifentanil group showed significantly less decrease in MAP (∆ = − 23 ± 13 vs. -36 ± 13 mmHg), HR (∆ = − 5 ± 7 vs. -10 ± 10 bpm), SV (∆ = − 23 ± 18 vs. -35 ± 19 ml) and CI (∆ = − 0.8 (− 1.5 to − 0.5) vs. -1.5 (− 2.0 to − 1.1) l min − 1  m − 2 ), while SctO 2 (∆ = 9 ± 5 vs. 6 ± 4%) showed more increase with no difference in ∆SptO 2 (∆ = 8 ± 7 vs. 8 ± 8%). Atropine caused higher ∆HR (13 (9 to 19) vs. 10 ± 6 bpm) and ∆CI (0.4 ± 0.4 vs. 0.2 ± 0.3 l min − 1  m − 2 ) in sufentanil vs. remifentanil-based anaesthesia, with no difference in ∆MAP, ∆SV and ∆SctO 2 and ∆SptO 2 . Conclusion Induction of anaesthesia with propofol and sufentanil results in improved haemodynamic stability and higher SctO 2 compared to propofol and remifentanil in patients having CABG. Administration of atropine might be useful to counteract or prevent the haemodynamic suppression associated with these opioids. Trial registration Clinicaltrials.gov on June 7, 2013 (trial ID: NCT01871935 ).
    Type of Medium: Online Resource
    ISSN: 1471-2253
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2020
    detail.hit.zdb_id: 2091252-3
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  • 3
    In: Canadian Journal of Anesthesia/Journal canadien d'anesthésie, Springer Science and Business Media LLC, Vol. 62, No. 11 ( 2015-11), p. 1153-1160
    Type of Medium: Online Resource
    ISSN: 0832-610X , 1496-8975
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2015
    detail.hit.zdb_id: 2050416-0
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  • 4
    Online Resource
    Online Resource
    Ovid Technologies (Wolters Kluwer Health) ; 2019
    In:  Anesthesia & Analgesia Vol. 129, No. 2 ( 2019-08), p. 409-415
    In: Anesthesia & Analgesia, Ovid Technologies (Wolters Kluwer Health), Vol. 129, No. 2 ( 2019-08), p. 409-415
    Abstract: Pulse oximetry–derived oxygen saturation is typically 〉 97% in normoxia and hyperoxia, limiting its clinical use. The new Oxygen Reserve Index (ORi), a relative indicator of the partial pressure of oxygen dissolved in arterial blood (Pa o 2 ) in the range of 100–200 mm Hg, may allow additional monitoring of oxygen status. METHODS: In this prospective validation intervention study, 20 healthy volunteers were breathing standardized oxygen concentrations ranging from mild hypoxia (fraction of inspired oxygen = 0.14) to hyperoxia (fraction of inspired oxygen = 1.0) via a tight-fitting face mask. ORi was measured noninvasively by multiwavelength pulse co-oximetry using 2 finger sensors. These ORi values (unitless scale, 0.00–1.00) were compared with measured Pa o 2 values. Repeated-measurements correlation analysis was performed to assess the ORi/Pa o 2 relationship. ORi trending ability was assessed using a 4-quadrant plot. The area under the receiver operating characteristics curve was calculated to assess the prediction of hypoxia (low-ranged Pa o 2 , 〈 100 mm Hg). RESULTS: Within the ORi-sensitive range, a strong positive correlation was found between ORi and Pa o 2 for both sensors ( R = 0.78 and 0.83; P 〈 .0001). ORi trending of Pa o 2 was good within this range (concordance rate = 94%). The prediction of Pa o 2 〈 100 mm Hg was also good, with an area under the receiver operating characteristics curve of 0.91 and 99% sensitivity and 82% specificity. CONCLUSIONS: In this prospective volunteer validation study, a strong and positive correlation between Pa o 2 and ORi was found, together with a good trending ability. Based on these data, the future use of ORi as a continuous noninvasive monitoring tool for assessing oxygenation status in patients receiving supplemental oxygen might be supported.
    Type of Medium: Online Resource
    ISSN: 0003-2999
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2019
    detail.hit.zdb_id: 2018275-2
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  • 5
    Online Resource
    Online Resource
    Ovid Technologies (Wolters Kluwer Health) ; 2019
    In:  Anesthesia & Analgesia Vol. 128, No. 2 ( 2019-02), p. 265-277
    In: Anesthesia & Analgesia, Ovid Technologies (Wolters Kluwer Health), Vol. 128, No. 2 ( 2019-02), p. 265-277
    Abstract: Maintaining brain function and integrity is a pivotal part of anesthesiological practice. The present overview aims to describe the current role of the 2 most frequently used monitoring methods for evaluation brain function in the perioperative period, ie, electroencephalography (EEG) and brain oxygenation monitoring. Available evidence suggests that EEG-derived parameters give additional information about depth of anesthesia for optimizing anesthetic titration. The effects on reduction of drug consumption or recovery time are heterogeneous, but most studies show a reduction of recovery times if anesthesia is titrated along processed EEG. It has been hypothesized that future EEG-derived indices will allow a better understanding of the neurophysiological principles of anesthetic-induced alteration of consciousness instead of the probabilistic approach most often used nowadays. Brain oxygenation can be either measured directly in brain parenchyma via a surgical burr hole, estimated from the venous outflow of the brain via a catheter in the jugular bulb, or assessed noninvasively by near-infrared spectroscopy. The latter method has increasingly been accepted clinically due to its ease of use and increasing evidence that near-infrared spectroscopy–derived cerebral oxygen saturation levels are associated with neurological and/or general perioperative complications and increased mortality. Furthermore, a goal-directed strategy aiming to avoid cerebral desaturations might help to reduce these complications. Recent evidence points out that this technology may additionally be used to assess autoregulation of cerebral blood flow and thereby help to titrate arterial blood pressure to the individual needs and for bedside diagnosis of disturbed autoregulation.
    Type of Medium: Online Resource
    ISSN: 0003-2999
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2019
    detail.hit.zdb_id: 2018275-2
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