Más sobre BIS/More on BIS

Septiembre 19, 2015. No. 2090

Efecto del monitoreo BIS sobre los requerimientos de anestesia en TCI para microdiscectomía lumbar The effect of bispectral index monitoring on anaesthetic requirements in target-controlled infusion for lumbar microdiscectomy. Karwacki Z, Niewiadomski S, Rzaska M, Witkowska M. Anaesthesiol Intensive Ther. 2014 Sep-Oct;46(4):284-8. doi: 10.5603/AIT.2014.0046. CONCLUSION: BIS monitoring reduces the doses of opioids and hypnotics used during total intravenous anaesthesia by TCI. PDF Monitoreo BIS durante sedación con propofol y remifentanil para disección endoscópica submucosa. Bispectral index monitoring during anesthesiologist-directed propofol and remifentanil sedation for endoscopic submucosal dissection: a prospective randomized controlled trial. Park WY, Shin YS, Lee SK, Kim SY, Lee TK, Choi YS. Yonsei Med J. 2014 Sep;55(5):1421-9. doi: 10.3349/ymj.2014.55.5.1421. Abstract PURPOSE: Endoscopic submucosal dissection (ESD) is a technically difficult and lengthy procedure requiring optimal depth of sedation. The bispectral index (BIS) monitor is a non-invasive tool that objectively evaluates the depth of sedation. The purpose of this prospective randomized controlled trial was to evaluate whether BIS guided sedation with propofol and remifentanil could reduce the number of patients requiring rescue propofol, and thus reduce the incidence of sedation- and/or procedure-related complications. MATERIALS AND METHODS: A total of 180 patients who underwent the ESD procedure for gastric adenoma or early gastric cancer were randomized to two groups. The control group (n=90) was monitored by the Modified Observer's Assessment of Alertness and Sedation scale and the BIS group (n=90) was monitored using BIS. The total doses of propofol and remifentanil, the need for rescue propofol, and the rates of complications were recorded. RESULTS: The number of patients who needed rescue propofol during the procedure was significantly higher in the control group than the BIS group (47.8% vs. 30.0%, p=0.014). There were no significant differences in the incidence of sedation- and/or procedure-related complications. CONCLUSION: BIS-guided propofol infusion combined with remifentanil reduced the number of patients requiring rescue propofol in ESD procedures. However, this finding did not lead to clinical benefits and thus BIS monitoring is of limited use during anesthesiologist-directed sedation. KEYWORDS: Bispectral index; endoscopic submucosal dissection; propofol; remifentanil PDF    BIS en la detección de dolor en pacientes adultos con ventilación mecánica en UCI The use of the bispectral index in the detection of pain in mechanically ventilated adults in the intensive care unit: a review of the literature. Coleman RM, Tousignant-Laflamme Y, Ouellet P, Parenteau-Goudreault É, Cogan J, Bourgault P. Pain Res Manag. 2015 Jan-Feb;20(1):e33-7. Epub 2014 Jul 22. Abstract BACKGROUND: Pain assessment is an immense challenge for clinicians, especially in the context of the intensive care unit, where the patient is often unable to communicate verbally. Several methods of pain assessment have been proposed to assess pain in this environment. These include both behavioural observation scales and evaluation of physiological measurements such as heart rate and blood pressure. Although numerous validation studies pertaining to behavioural observation scales have been published, several limitations associated with using these measures for pain assessment remain. Over the past few years, researchers have been interested in the use of the bispectral index monitoring system as a proxy for the evaluation of encephalography readings to assess the level of anesthesia and, potentially, analgesia. OBJECTIVES: To synthesize the main studies exploring the use of the bispectral index monitoring system for pain assessment, to guide future research in adults under sedation in the intensive care unit. METHOD: The EMBASE, Medline, CINAHL and PsycINFO databases were searched for studies published between 1996 and 2013 that evaluated the use of the bispectral index in assessing pain. RESULTS: Most studies conclude that nociceptive stimulation causes a significant increase in the bispectral index and revealed the importance of controlling certain confounding variables such as the level of sedation. DISCUSSION: Further studies are needed to clearly demonstrate the relationship between nociceptive stimuli and the bispectral index, as well as the specificity of the bispectral index in detecting pain. PDF

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