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Gavet M, Cardinali M, Bernady A, Ruiz CC, Allaouchiche B, Junot S. Evaluation of the Surgical Pleth Index (SPI) for the monitoring of the nociception-antinociception balance in dogs undergoing castration: A prospective clinical trial. Res Vet Sci 2024; 175:105320. [PMID: 38838512 DOI: 10.1016/j.rvsc.2024.105320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 05/29/2024] [Accepted: 05/30/2024] [Indexed: 06/07/2024]
Abstract
The aim of this prospective clinical study was to evaluate the efficacy of the Surgical Pleth Index (SPI), a validated nociception monitor in human anaesthesia, in dogs. The technology uses a plethysmographic signal from a specific pulse oximetry probe to analyse pulse wave amplitudes and heartbeat intervals. Twenty-six healthy dogs anaesthetised for castration were included. SPI, invasive mean arterial pressure (MAP) and heart rate (HR) were continuously monitored. The occurrence or resolution of a haemodynamic reaction (HDR), defined as a > 20% increase in HR and/or MAP, was assessed at predefined times: cutaneous incision, testicles' exteriorization, cutaneous suture, and fentanyl administration. Following nociceptive events, the dogs presenting a HDR showed a significant 8% and 10% increase in SPI at 3 and 5 min respectively, whereas after fentanyl administration, a 13% and 16% significant decrease in SPI were noted. Receiver operating characteristic curves analysis indicated a moderate performance for the dynamic variations of SPI over 1 min to predict a HDR (AUC: 0.68, threshold value: +15%) or its resolution after fentanyl administration (AUC of 0.72, threshold value: -15%) within 3 min. The SPI varied according to perioperative nociceptive events and analgesic treatment; however, its performance to anticipate a HDR was limited with high specificity but low sensivity. Refinement of the algorithm to specifically accommodate for the canine species may be warranted. Further studies are required to evaluate the influence of other factors on the performance of this index.
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Affiliation(s)
- Morgane Gavet
- Université de Lyon, Service d'anesthésie, VetAgro Sup, 1 avenue Bourgelat F-69280 Marcy l'Etoile, France.
| | - Martina Cardinali
- Université de Lyon, Service d'anesthésie, VetAgro Sup, 1 avenue Bourgelat F-69280 Marcy l'Etoile, France
| | - Angelique Bernady
- Université de Lyon, Service d'anesthésie, VetAgro Sup, 1 avenue Bourgelat F-69280 Marcy l'Etoile, France
| | - Clara Conde Ruiz
- Université de Lyon, Service d'anesthésie, VetAgro Sup, 1 avenue Bourgelat F-69280 Marcy l'Etoile, France.
| | - Bernard Allaouchiche
- Université de Lyon, APCSe Agressions Pulmonaires et Circulatoires dans le Sepsis, VetAgro Sup, 1 avenue Bourgelat F-69280 Marcy l'Etoile, France; Université de Lyon, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Réanimation Medicale, 165 Chemin du Grand Revoyet, F-69310 Pierre-Bénite, France
| | - Stephane Junot
- Université de Lyon, Service d'anesthésie, VetAgro Sup, 1 avenue Bourgelat F-69280 Marcy l'Etoile, France; Université de Lyon, APCSe Agressions Pulmonaires et Circulatoires dans le Sepsis, VetAgro Sup, 1 avenue Bourgelat F-69280 Marcy l'Etoile, France.
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Mieszczański P, Kołacz M, Trzebicki J. Opioid-Free Anesthesia in Bariatric Surgery: Is It the One and Only? A Comprehensive Review of the Current Literature. Healthcare (Basel) 2024; 12:1094. [PMID: 38891169 PMCID: PMC11171472 DOI: 10.3390/healthcare12111094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/13/2024] [Accepted: 05/23/2024] [Indexed: 06/21/2024] Open
Abstract
Opioid-free anesthesia (OFA) is a heterogeneous group of general anesthesia techniques in which the intraoperative use of opioids is eliminated. This strategy aims to decrease the risk of complications and improve the patient's safety and comfort. Such potential advantages are particularly beneficial for selected groups of patients, among them obese patients undergoing laparoscopic bariatric surgery. Opioids have been traditionally used as an element of balanced anesthesia, and replacing them requires using a combination of coanalgesics and various types of local and regional anesthesia, which also have their side effects, limitations, and potential disadvantages. Moreover, despite the growing amount of evidence, the empirical data on the superiority of OFA compared to standard anesthesia with multimodal analgesia are contradictory, and potential benefits in many studies are being questioned. Additionally, little is known about the long-term sequelae of such a strategy. Considering the above-mentioned issues, this study aims to present the potential benefits, risks, and difficulties of implementing OFA in bariatric surgery, considering the current state of knowledge and literature.
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Affiliation(s)
- Piotr Mieszczański
- 1st Department of Anaesthesiology and Intensive Care, Medical University of Warsaw, Lindleya 4 Str., 02-005 Warsaw, Poland; (M.K.); (J.T.)
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Oh SK, Won YJ, Lim BG. Surgical pleth index monitoring in perioperative pain management: usefulness and limitations. Korean J Anesthesiol 2024; 77:31-45. [PMID: 36926752 PMCID: PMC10834712 DOI: 10.4097/kja.23158] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/16/2023] [Accepted: 03/16/2023] [Indexed: 03/18/2023] Open
Abstract
Surgical pleth index (SPI) monitoring is a representative, objective nociception-monitoring device that measures nociception using photoplethysmographic signals. It is easy to apply to patients and the numerical calculation formula is intuitively easy to understand; therefore, its clinical interpretation is simple. Several studies have demonstrated its efficacy and utility. Compared with hemodynamic parameters, the SPI can detect the degree of nociception during surgery under general anesthesia with greater accuracy, and therefore can provide better guidance for the administration of various opioids, including remifentanil, fentanyl, and sufentanil. Indeed, SPI-guided analgesia is associated with lower intraoperative opioid consumption, faster patient recovery, and comparable or lower levels of postoperative pain and rates of adverse events compared with conventional analgesia. In addition, SPI monitoring allows for the degree of postoperative pain and analgesic requirements to be predicted through the SPI values immediately before patient arousal. However, because patient age, effective circulating volume, position, concomitant medication and anesthetic regimen and level of consciousness may be confounding factors in SPI monitoring, clinicians must be careful when interpreting SPI values. In addition, as SPI values can differ depending on anesthetic and analgesic regimens and the underlying disease, an awareness of the effects of these variables with an understanding of the advantages and disadvantages of SPI monitoring compared to other nociception monitoring devices is essential. Therefore, this review aimed to help clinicians perform optimal SPI-guided analgesia and to assist with the establishment of future research designs through clarifying current usefulness and limitations of SPI monitoring in perioperative pain management.
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Affiliation(s)
- Seok Kyeong Oh
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
| | - Young Ju Won
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
| | - Byung Gun Lim
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
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Ledowski T. [New Approaches in Perioperative Algesimetry]. Anasthesiol Intensivmed Notfallmed Schmerzther 2023; 58:640-653. [PMID: 38056443 DOI: 10.1055/a-2006-9923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
The measurement of anaesthetic depth and muscle relaxation have been routine procedures during general anaesthesia for years. Quantification of intraoperative nociception, on the other hand, is still largely impossible. Various methods have been tested and commercialised for more than 10 years. However, a real breakthrough has not yet been achieved and the routine application of all methods available so far is not without problems. This article explains methodological similarities, but also points to specific aspects of various commercial solutions for perioperative algesimetry.
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Goff J, Hina M, Malik N, McLardy H, Reilly F, Robertson M, Ruddy L, Willox F, Forget P. Can Opioid-Free Anaesthesia Be Personalised? A Narrative Review. J Pers Med 2023; 13:jpm13030500. [PMID: 36983682 PMCID: PMC10056629 DOI: 10.3390/jpm13030500] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 03/04/2023] [Accepted: 03/08/2023] [Indexed: 03/12/2023] Open
Abstract
Background: A significant amount of evidence suggests that Opioid-Free Anaesthesia (OFA) may provide better outcomes for patients undergoing surgery, sparing patients who are particularly vulnerable to adverse side effects of opioids. However, to what extent personalizing OFA is feasible and beneficial has not been adequately described. Methods: We conducted a narrative literature review aiming to provide a comprehensive understanding of nociception and pain and its context within the field of OFA. Physiological (including monitoring), pharmacological, procedural (type of surgery), genetical and phenotypical (including patients’ conditions) were considered. Results: We did not find any monitoring robustly associated with improved outcomes. However, we found evidence supporting particular OFA indications, such as bariatric and cancer surgery. We found that vulnerable patients may benefit more from OFA, with an interesting field of research in patients suffering from vascular disease. We found a variety of techniques and medications making it impossible to consider OFA as a single technique. Our findings suggest that a vast field of research remains unexplored. In particular, a deeper understanding of nociception with an interest in its genetic and acquired contributors would be an excellent starting point paving the way for personalised OFA. Conclusion: Recent developments in OFA may present a more holistic approach, challenging the use of opioids. Understanding better nociception, given the variety of OFA techniques, may help to maximize their potential in different contexts and potential indications.
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Affiliation(s)
- Jenna Goff
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - Morgan Hina
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - Nayaab Malik
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - Hannah McLardy
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - Finley Reilly
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - Matthew Robertson
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
- Correspondence:
| | - Louis Ruddy
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - Faith Willox
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - Patrice Forget
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
- Department of Anaesthesia, NHS Grampian, Aberdeen AB25 2ZD, UK
- Pain AND Opioids after Surgery (PANDOS) European Society of Anaesthesia and Intensive Care (ESAIC) Research Group, 1000 Brussels, Belgium
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Nociception Control of Bilateral Single-Shot Erector Spinae Plane Block Compared to No Block in Open Heart Surgery-A Post Hoc Analysis of the NESP Randomized Controlled Clinical Trial. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:medicina59020265. [PMID: 36837467 PMCID: PMC9965417 DOI: 10.3390/medicina59020265] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/24/2023] [Accepted: 01/27/2023] [Indexed: 01/31/2023]
Abstract
Background and Objectives: The erector spinae plane block (ESPB) is an analgesic adjunct demonstrated to reduce intraoperative opioid consumption within a Nociception Level (NOL) index-directed anesthetic protocol. We aimed to examine the ESPB effect on the quality of intraoperative nociception control evaluated with the NOL index. Materials and Methods: This is a post hoc analysis of the NESP (Nociception Level Index-Directed Erector Spinae Plane Block in Open Heart Surgery) randomized controlled trial. Eighty-five adult patients undergoing on-pump cardiac surgery were allocated to group 1 (Control, n = 43) and group 2 (ESPB, n = 42). Both groups received general anesthesia. Preoperatively, group 2 received bilateral single-shot ESPB (1.5 mg/kg/side 0.5% ropivacaine mixed with dexamethasone 8 mg/20 mL). Until cardiopulmonary bypass (CPB) was initiated, fentanyl administration was individualized using the NOL index. The NOL index was compared at five time points: pre-incision (T1), post-incision (T2), pre-sternotomy (T3), post-sternotomy (T4), and pre-CPB (T5). On a scale from 0 (no nociception) to 100 (extreme nociception), a NOL index > 25 was considered an inadequate response to noxious stimuli. Results: The average NOL index across the five time points in group 2 to group 1 was 12.78 ± 0.8 vs. 24.18 ± 0.79 (p < 0.001). The NOL index was significantly lower in the ESPB-to-Control group at T2 (12.95 ± 1.49 vs. 35.97 ± 1.47), T3 (13.28 ± 1.49 vs. 24.44 ± 1.47), and T4 (15.52 ± 1.49 vs. 34.39 ± 1.47) (p < 0.001) but not at T1 and T5. Compared to controls, significantly fewer ESPB patients reached a NOL index > 25 at T2 (4.7% vs. 79%), T3 (0% vs. 37.2%), and T4 (7.1% vs. 79%) (p < 0.001). Conclusions: The addition of bilateral single-shot ESPB to general anesthesia during cardiac surgery improved the quality of intraoperative nociception control according to a NOL index-based evaluation.
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Kim ED, Lee Y, Choi S, Lee H, Ohn C, Kwon W. Abdominal Wall Block Decreases Intraoperative Opioid Con-Sumption by Surgical Pleth Index-Guided Remifentanil Administration in Single-Port Laparoscopic Herniorrhaphy: A Prospective Randomized Controlled Trial. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:16012. [PMID: 36498087 PMCID: PMC9736213 DOI: 10.3390/ijerph192316012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/26/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
Abdominal wall blocks (AWBs) can reduce pain during surgery and lessen opioid demand. Since it is difficult to know the exact level of intraoperative pain, it is not known how much the opioid dose should be reduced. In this study, using the surgical pleth index (SPI), which indicates pain index from sympathetic fibers, the amount of remifentanil consumption was investigated. We conducted single-port laparoscopic hernia repair in 64 patients, as follows: the regional block group (R group) was treated with AWB, while the control group (C group) was only subjected to general anesthesia. In both groups, the remifentanil concentration was adjusted to maintain the SPI score between 30 and 40 during surgery. The primary parameter was the amount of remifentanil. A total of 52 patients completed the study (24 in the R group, 28 in the C group). The remifentanil dose during surgery was decreased in the R group (29 ± 21 vs. 56 ± 36 ng/kg/min; p = 0.002). Visual analogue scale score and additional administrated analgesics were also low in the R group. As such, AWB can reduce the remifentanil dose while maintaining the same pain level.
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Hung KC, Huang YT, Kuo JR, Hsu CW, Yew M, Chen JY, Lin MC, Chen IW, Sun CK. Elevated Surgical Pleth Index at the End of Surgery Is Associated with Postoperative Moderate-to-Severe Pain: A Systematic Review and Meta-Analysis. Diagnostics (Basel) 2022; 12:diagnostics12092167. [PMID: 36140567 PMCID: PMC9498235 DOI: 10.3390/diagnostics12092167] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/02/2022] [Accepted: 09/03/2022] [Indexed: 11/16/2022] Open
Abstract
Despite acceptance of the surgical pleth index (SPI) for monitoring the intraoperative balance between noxious stimulation and anti-nociception under general anesthesia, its efficacy for predicting postoperative moderate-to-severe pain remains unclear. We searched electronic databases (e.g., Google Scholar, MEDLINE, Cochrane Library, and EMBASE) to identify articles focusing on associations of SPI at the end of surgery with immediate moderate-to-severe pain in the postanesthesia care unit from inception to 7 July 2022. A total of six observational studies involving 756 adults published between 2016 and 2020 were eligible for quantitative syntheses. Pooled results revealed higher values of SPI in patients with moderate-to-severe pain than those without (mean difference: 7.82, 95% CI: 3.69 to 11.95, p = 0.002, I2 = 46%). In addition, an elevated SPI at the end of surgery was able to predict moderate-to-severe pain with a sensitivity of 0.71 (95% confidence interval (CI): 0.65–0.77; I2 = 29.01%) and a specificity of 0.58 (95% CI: 0.39–0.74; I2 = 79.31%). The overall accuracy based on the summary receiver operating characteristic (sROC) curve was 0.72. In conclusion, this meta-analysis highlighted the feasibility of the surgical pleth index to predict postoperative moderate-to-severe pain immediately after surgery. Our results from a limited number of studies warrant further investigations for verification.
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Affiliation(s)
- Kuo-Chuan Hung
- Department of Anesthesiology, Chi Mei Medical Center, Tainan City 71004, Taiwan
- Department of Hospital and Health Care Administration, College of Recreation and Health Management, Chia Nan University of Pharmacy and Science, Tainan City 71710, Taiwan
| | - Yen-Ta Huang
- Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan City 70101, Taiwan
| | - Jinn-Rung Kuo
- Department of Neurosurgery, Chi Mei Medical Center, Tainan City 71004, Taiwan
- Department of Medical Research, Chi Mei Medical Center, Tainan City 71004, Taiwan
| | - Chih-Wei Hsu
- Department of Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung City 83301, Taiwan
| | - Ming Yew
- Department of Anesthesiology, Chi Mei Medical Center, Tainan City 71004, Taiwan
| | - Jen-Yin Chen
- Department of Anesthesiology, Chi Mei Medical Center, Tainan City 71004, Taiwan
| | - Ming-Chung Lin
- Department of Anesthesiology, Chi Mei Medical Center, Tainan City 71004, Taiwan
| | - I-Wen Chen
- Department of Anesthesiology, Chi Mei Medical Center, Liouying, Tainan City 73657, Taiwan
- Correspondence: (I.-W.C.); (C.-K.S.)
| | - Cheuk-Kwan Sun
- Department of Emergency Medicine, E-Da Hospital, Kaohsiung City 82445, Taiwan
- College of Medicine, I-Shou University, Kaohsiung City 84001, Taiwan
- Correspondence: (I.-W.C.); (C.-K.S.)
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Abstract
The intraoperative dosing of opioids is a challenge in routine anesthesia as the potential effects of intraoperative overdosing and underdosing are not completely understood. In recent years an increasing number of monitors were approved, which were developed for the detection of intraoperative nociception and therefore should enable a better control of opioid titration. The nociception monitoring devices use either continuous hemodynamic, galvanic or thermal biosignals reflecting the balance between parasympathetic and sympathetic activity, measure the pupil dilatation reflex or the nociceptive flexor reflex as a reflexive response to application of standardized nociceptive stimulation. This review article presents the currently available nociception monitors. Most of these monitoring devices detect nociceptive stimulations with higher sensitivity and specificity than changes in heart rate, blood pressure or sedation depth monitoring devices. There are only few studies on the effect of opioid titration guided by nociception monitoring and the possible postoperative benefits of these devices. All nociception monitoring techniques are subject to specific limitations either due to perioperative confounders (e.g. hypovolemia) or special accompanying medical conditions (e.g. muscle relaxation). There is an ongoing discussion about the clinical relevance of nociceptive stimulation in general anesthesia and the effect on patient outcome. Initial results for individual monitor systems show a reduction in opioid consumption and in postoperative pain level. Nevertheless, current evidence does not enable the routine use of nociception monitoring devices to be recommended as a clear beneficial effect on long-term outcome has not yet been proven.
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Eriguchi A, Matsuura N, Koukita Y, Ichinohe T. Effects of Remifentanil on Cardiovascular Stimulation Caused by Local Anesthetic With Epinephrine: A Power Spectral Analysis. Anesth Prog 2021; 68:10-18. [PMID: 33827126 DOI: 10.2344/anpr-67-03-10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 06/12/2020] [Indexed: 11/11/2022] Open
Abstract
The objectives of this research were to investigate (a) what was the most effective infusion rate of remifentanil and (b) the degree to which sympathomimetic effects were involved with cardiovascular stimulation by using a power spectral analysis of heart rate variability (HRV). A total of 63 healthy individuals scheduled for sagittal split ramus osteotomy were enrolled and randomly allocated to 1 of 3 groups: remifentanil infusion rate of 0.1, 0.2, or 0.4 μg/kg/min. Anesthesia was maintained with remifentanil and propofol. Before the surgical procedure, 2% lidocaine containing 12.5 μg/mL epinephrine was administered in the surgical field for local anesthesia. Systolic blood pressure (SBP), heart rate (HR), low-frequency (LF) and high-frequency (HF) components in HRV power spectral analysis, and the LF/HF ratio were analyzed. Increases in SBP and HR were observed after local anesthesia in all 3 groups, but no significant differences were observed between the groups. Remifentanil infusion at 0.1 μg/kg/min may be appropriate to minimize cardiovascular stimulation caused by exogenous epinephrine from local anesthesia. Although a rise in the LF/HF ratio was observed after local anesthesia in all groups, no relationship was observed between the cardiovascular changes and the increase in LF/HF ratio. This suggests that sympathomimetic effects are involved to a lesser extent with the cardiovascular stimulation caused by exogenous epinephrine.
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Affiliation(s)
| | | | | | - Tatsuya Ichinohe
- Professor and Chairman, Department of Dental Anesthesiology, Tokyo Dental College, Tokyo, Japan
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Zhang JW, Lv ZG, Kong Y, Han CF, Wang BG. Wavelet and pain rating index for inhalation anesthesia: A randomized controlled trial. World J Clin Cases 2020; 8:5221-5234. [PMID: 33269258 PMCID: PMC7674720 DOI: 10.12998/wjcc.v8.i21.5221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 08/05/2020] [Accepted: 09/28/2020] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Wavelet index (WLi) and pain rating index (PRi) are new parameters for regulating general anesthesia depth based on wavelet analysis.
AIM To investigate the safety and efficacy of using WLi or PRi in sevoflurane anesthesia.
METHODS This randomized controlled trial enrolled 66 patients scheduled for elective posterior lumbar interbody fusion surgery under sevoflurane anesthesia between September 2017 and February 2018. A random number generator was used to assign the eligible patients to three groups: Systolic blood pressure (SBP) monitoring group, WLi monitoring group, and PRi monitoring group. The main anesthesiologist was aware of the patient grouping and intervention used. The primary endpoint was anesthesia recovery time. Secondary endpoints included extubation time, sevoflurane consumption, number of unwanted events/ interventions, number of adverse events and postoperative visual analogue scale for pain.
RESULTS A total of 62 patients were included in the final analysis (SBP group, n = 21; WLi group, n = 21; and PRi group, n = 20). There were no significant differences among the three groups in patient age, gender distribution, body mass index, American Society of Anesthesiologists class, duration of surgery, or duration of anesthesia. Anesthesia recovery time was shorter in the WLi and PRi groups than in the SBP group with no significant difference between the WLi and PRi groups. Extubation time was shorter in the WLi and PRi groups than in the SBP group. Sevoflurane consumption was lower in the WLi and PRi groups than in the SBP group. Nicardipine was more commonly needed to treat hypertension in the WLi and PRi groups than in the SBP group.
CONCLUSION Regulation of sevoflurane anesthesia depth with WLi or PRi reduced anesthesia recovery time, extubation time and sevoflurane consumption without intraoperative unwanted events.
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Affiliation(s)
- Jian-Wen Zhang
- Department of Anesthesiology, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
- Department of Anesthesiology, Shanxi Dayi Hospital, Taiyuan 030032, Shanxi Province, China
| | - Zhi-Gan Lv
- Department of Anesthesiology, Shanxi Dayi Hospital, Taiyuan 030032, Shanxi Province, China
| | - Ying Kong
- Department of Anesthesiology, Shanxi Dayi Hospital, Taiyuan 030032, Shanxi Province, China
| | - Chong-Fang Han
- Department of Anesthesiology, Shanxi Dayi Hospital, Taiyuan 030032, Shanxi Province, China
| | - Bao-Guo Wang
- Department of Anesthesiology, Sanbo Brain Hospital, Capital Medical University, Beijing 100093, China
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Kim JH, Jwa EK, Choung Y, Yeon HJ, Kim SY, Kim E. Comparison of Pupillometry With Surgical Pleth Index Monitoring on Perioperative Opioid Consumption and Nociception During Propofol-Remifentanil Anesthesia: A Prospective Randomized Controlled Trial. Anesth Analg 2020; 131:1589-1598. [PMID: 33079883 DOI: 10.1213/ane.0000000000004958] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Intraoperative monitoring with pupillometry has shown promising results for nociception/antinociception balance monitoring. However, its benefits in clinical practice remain unproven. The aim of this study was to evaluate the efficacy of intraoperative pupillometry monitoring on intraoperative opioid consumption and postoperative pain compared to surgical pleth index (SPI), another widely investigated monitoring. METHODS American Society of Anesthesiologists (ASA) I-II patients scheduled for elective laparoscopic cholecystectomy were included. This prospective, parallel-arm, single-center study was conducted in 2 steps. First, we evaluated the feasibility of using pupillometry and SPI monitoring compared with conventional hemodynamic monitoring. Next, a parallel-arm, double-blind randomized study compared the peak postoperative pain measured with numerical rating scale (NRS) from 0 (no pain) to 10 (extreme pain) as a primary outcome between pupillometry (pupillometry group, n = 43) and SPI monitoring (SPI group, n = 43) using Mann-Whitney U test. Secondary outcomes included intraoperative remifentanil consumption, postoperative opioid responsiveness (a decrease in NRS by ≥1 after fentanyl administrations), number of analgesic administrations, and opioid-related complications. RESULTS In the preliminary study (n = 50), remifentanil consumption was less under pupillometry monitoring compared to SPI monitoring, and peak postoperative pain was lower under pupillometry compared to conventional monitoring. In the main study (n = 86), peak postoperative pain and intraoperative remifentanil consumption were lower in the pupillometry group (median [first to third quartile], 5 [4-6]; mean ± standard deviation [SD], 0.078 ± 0.019 μg·kg·minute) compared to the SPI group (7 [5-8] and 0.0130 ± 0.051 μg·kg·minute; P < .001), with the median difference in peak postoperative pain of -1 and its 95% confidence interval between -2 and -0.5. The pupillometry group had better responsiveness to fentanyl (84.6% vs 61.0%; P = .005) and lower number of analgesic administrations (2 [1-2] vs 2 [1-3]; P = .048) compared to the SPI group. CONCLUSIONS Intraoperative pupillometry monitoring reduced intraoperative remifentanil consumption and postoperative pain. It may be an alternative option for intraoperative opioid control under general anesthesia in adult patients.
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Affiliation(s)
- Jong Hae Kim
- From the Department of Anesthesiology and Pain Medicine, Daegu Catholic University Medical Center, School of Medicine, Daegu Catholic University, Daegu, Republic of Korea
| | - Eun Kyung Jwa
- Division of Hepatobiliary Surgery, Department of Surgery, Daegu Catholic University Medical Center, School of Medicine, Daegu Catholic University, Daegu, Republic of Korea
| | - Youjin Choung
- Department of Anesthesiology and Pain Medicine, Hanyang University Medical Center, Seoul, Republic of Korea
| | - Hyo Jin Yeon
- Department of Anesthesiology and Pain Medicine, Hanyang University Medical Center, Seoul, Republic of Korea
| | - Soo Yeon Kim
- Department of Anesthesiology and Pain Medicine, Hanyang University Medical Center, Seoul, Republic of Korea
| | - Eugene Kim
- Department of Anesthesiology and Pain Medicine, Hanyang University Medical Center, College of Medicine, Hanyang University, Seoul, Republic of Korea
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Predictive value of the surgical pleth index for the hemodynamic responses to trachea intubation and skin incision. J Clin Monit Comput 2019; 34:1303-1309. [PMID: 31808060 DOI: 10.1007/s10877-019-00425-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 11/17/2019] [Indexed: 10/25/2022]
Abstract
Surgical pleth index (SPI) has been widely investigated in assessing the nociceptive level. The aim of this study was to investigate the relationship between SPI level and patient responses to trachea intubation and skin incision. A total of 40 patients undergoing open abdominal general surgery were recruited for analyses. The patients were monitored with electrocardiogram, non-invasive blood pressure, SpO2, invasive blood pressure and SPI before anesthesia induction. Anesthesia was induced with midazolam, propofol, sufentanil and rocuronium and maintained with sufentanil and sevoflurane. Blood pressure, heart rate and SPI were recorded for analyses during the peri-intubation and peri-incision periods. A receiver operating characteristic (ROC) curve analysis was performed to analyze the predictive value of blood pressure, heart rate (HR) and SPI for hemodynamic responses for trachea intubation and skin incision. SPI had a similar changing trend to systolic blood pressure (SBP) and diastolic blood pressure (DBP). The SPI level was linearly correlated with SBP, DBP and HR. SPI increased significantly after intubation and incision in patients with positive but not negative responses to intubation and incision. The ROC analysis showed that only SBP level is predictive of intubation responses. These data suggested that SPI elevated under the noxious stimulation by intubation and incision, but it was not predictive of the hemodynamic responses to intubation and incision.
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Abstract
PURPOSE OF REVIEW In an unconscious patient, there can be significant challenges to monitoring nociception and proper dosing of analgesic medications. The traditional measures of intraoperative nociception have poor sensitivity and specificity with little predictive value in postoperative outcomes such as postoperative pain, opioid-induced side effects, length of stay or incidence of opioid use disorder. To date, several monitoring modalities are in development to establish objective measures of the balance between nociception and analgesia with the goal of guiding anesthesiologists and improve patient outcomes. In this review, some of the most promising monitoring modalities are discussed with the most recent findings. RECENT FINDINGS Multiple modalities are beginning to demonstrate utility compared with traditional care. Most, but not all, of these studies show decreased intraoperative opioid use and some show lower pain scores and opioid requirements in the postanesthesia care unit. SUMMARY Recent evidence points to promising efficacy for these monitoring modalities; however, this field is in its infancy. More investigation is required to demonstrate differences in outcome compared with traditional care, and these differences need to be of sufficient import to achieve widespread adoption.
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Ghanty I, Schraag S. The quantification and monitoring of intraoperative nociception levels in thoracic surgery: a review. J Thorac Dis 2019; 11:4059-4071. [PMID: 31656682 DOI: 10.21037/jtd.2019.08.62] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Nociception is the unconscious perception of a stimulus applied by trauma or surgery and expressed through a response of the autonomous nervous system. Local anaesthetics (LAs), opioids and other modulating agents such as ketamine are usually utilised to blunt nociception as a component during general anaesthesia (GA) and surgery. The effectiveness of these measures, however, are still difficult to quantify and monitoring of anti-nociception has been confined to assess variation of heart rate (HR) or blood pressure (BP). Recently, various monitoring concepts have been introduced to quantify nociception more systematically and on the other hand guide anti-nociceptive interventions more appropriately. This review describes the various technologies, their performance in clinical studies and provides a critical appraisal with particular application to thoracic anaesthesia and surgery and their relevance in the context of chronic pain after surgery.
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Affiliation(s)
- Ismael Ghanty
- Department of Perioperative Medicine, Golden Jubilee National Hospital, Clydebank, UK
| | - Stefan Schraag
- Department of Perioperative Medicine, Golden Jubilee National Hospital, Clydebank, UK
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Objective monitoring of nociception: a review of current commercial solutions. Br J Anaesth 2019; 123:e312-e321. [PMID: 31047645 DOI: 10.1016/j.bja.2019.03.024] [Citation(s) in RCA: 139] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 02/11/2019] [Accepted: 03/04/2019] [Indexed: 11/22/2022] Open
Abstract
Nociception, in contrast to pain, is not a subjective feeling, but the physiological encoding and processing of nociceptive stimuli. However, monitoring nociception remains a challenge in attempts to lower the incidence of acute postoperative pain and the move towards a more automated approach to analgesia and anaesthesia. To date, several commercialised devices promise a more accurate reflection of nociception than the traditionally used vital signs, blood pressure and heart rate. This narrative review presents an overview of existing technologies and commercially available devices, and offers a perspective for future research. Although firm conclusions about individual methods may be premature, none currently appears to offer a sufficiently broad applicability. Furthermore, there is currently no firm evidence for any clinically relevant influence of such devices on patient outcome. However, the available monitors have significantly aided the understanding of underlying mechanisms and identification of potential pitfalls.
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Jain N, Gera A, Sharma B, Sood J, Chugh P. Comparison of Surgical Pleth Index-guided analgesia using fentanyl versus conventional analgesia technique in laparoscopic cholecystectomy. Minerva Anestesiol 2019; 85:358-365. [DOI: 10.23736/s0375-9393.18.12954-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Won YJ, Lim BG, Kim YS, Lee M, Kim H. Usefulness of surgical pleth index-guided analgesia during general anesthesia: a systematic review and meta-analysis of randomized controlled trials. J Int Med Res 2018; 46:4386-4398. [PMID: 30198405 PMCID: PMC6259411 DOI: 10.1177/0300060518796749] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objective Previous studies comparing surgical pleth index (SPI)-guided and conventional analgesia have shown differing results. Therefore, we compared the intraoperative opioid requirement, extubation time, postoperative pain scores, and perioperative adverse events between these two modalities. Methods A comprehensive literature search was conducted to identify randomized controlled trials comparing the intraoperative opioid requirement and other outcomes between the two modalities. The mean difference (MD) or the pooled risk ratio and corresponding 95% confidence interval (CI) were used for analysis. A heterogeneity (I2) assessment was performed. Results Six randomized controlled trials comparing 463 patients were included. Intraoperative opioid consumption was significantly lower in the SPI-guided than conventional analgesia group (standardized MD, −0.41; 95% CI, −0.70 to −0.11; I2 = 53%). No significant intergroup difference was observed in the pain score on the first postoperative day or the incidence of perioperative adverse events. The extubation time was considerably shorter in the SPI-guided than conventional analgesia group (MD, −1.91; 95% CI, −3.33 to −0.49; I2 = 67%). Conclusions Compared with conventional analgesia, SPI-guided analgesia can reduce intraoperative opioid consumption and facilitate extubation. Moreover, no intergroup difference was observed in the degree of postoperative pain or incidence of perioperative adverse events.
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Affiliation(s)
- Young Ju Won
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Byung Gun Lim
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Young Sung Kim
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Mido Lee
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Heezoo Kim
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
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Harju J, Kalliomäki ML, Leppikangas H, Kiviharju M, Yli-Hankala A. Surgical pleth index in children younger than 24 months of age: a randomized double-blinded trial. Br J Anaesth 2018; 117:358-64. [PMID: 27543530 DOI: 10.1093/bja/aew215] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/15/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The surgical pleth index (SPI) is a measurement of intraoperative nociception. Evidence of its usability in children is limited. Given that the autonomic nervous system is still developing during the first years of life, the performance of the SPI on small children cannot be concluded from studies carried out in older age groups. METHODS Thirty children aged <2 yr, planned for elective open inguinal hernia repair or open correction of undescended testicle, were recruited. The children were randomized into two groups; the saline group received ultrasound-guided saline injection in the ilioinguinal and iliohypogastric nerve region before surgery and ropivacaine after surgery, whereas the block group received the injections in the opposite order. The SPI was recorded blinded and was analysed at the time points of intubation, incision, and when signs of inadequate anti-nociception were observed. RESULTS There was a significant increase in the SPI after intubation (P=0.019) and after incision in the saline group (P=0.048), but not at the time of surgical incision in the block group (P=0.177). An increase in the SPI was also seen at times of clinically apparent inadequate anti-nociception (P=0.008). The between-patient variability of the SPI was large. CONCLUSIONS The SPI is reactive in small children after intubation and after surgical stimuli, but the reactivity of the SPI is rather small, and there is marked inter-individual variability in reactions. The reactivity is blunted by the use of ilioinguinal and iliohypogastric nerve block. CLINICAL TRIAL REGISTRATION NCT02045810.
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Affiliation(s)
- J Harju
- Department of Anaesthesia, Tampere University Hospital, PL2000, Tampere 33521, Finland
| | - M-L Kalliomäki
- Department of Anaesthesia, Tampere University Hospital, PL2000, Tampere 33521, Finland
| | - H Leppikangas
- Department of Anaesthesia, Tampere University Hospital, PL2000, Tampere 33521, Finland
| | - M Kiviharju
- Department of Anaesthesia, Tampere University Hospital, PL2000, Tampere 33521, Finland
| | - A Yli-Hankala
- Department of Anaesthesia, Tampere University Hospital, PL2000, Tampere 33521, Finland Medical School, University of Tampere, Tampere, Finland
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Defresne A, Harrison M, Clement F, Barvais L, Bonhomme V. Two different methods to assess sympathetic tone during general anesthesia lead to different findings. J Clin Monit Comput 2018; 33:463-469. [PMID: 29943169 DOI: 10.1007/s10877-018-0175-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 06/20/2018] [Indexed: 12/19/2022]
Abstract
Noxious stimulation influences the autonomic nervous system activity. Sympathetic tone monitoring is currently used to assess the adequacy of the balance between nociception and anti-nociception during general anesthesia. The Surgical Plethysmographic Index (SPI) and the EBMi software (Custos©) are commercial devices that use different algorithms to measure it. We aimed at determining whether those devices provide similar information during routine surgical procedures under general anesthesia. Data acquired during a previously published study in patients undergoing surgery under general anesthesia were retrospectively analyzed and passed through the EBMi software. The occurrence of EBMi alarms of increased sympathetic tone was compared to the occurrence of SPI values ≥ 60, a commonly recommended intraoperative SPI threshold. Trends in classical parameters of sympathetic tone during the 5 min preceding a SPI ≥ 60, namely blood pressure, heart rate, and plethysmographic pulse amplitude were assessed. SPI ≥ 60 episodes (n = 307) were more frequent than EBMi alerts (n = 240). Approximately 70% of EBMi alerts occurred during periods where the SPI was below 60. Among all episodes of SPI ≥ 60, absence of any EBMi alerts was much more frequent than the inverse. A majority, but not all SPI ≥ 60 episodes were consistently preceded by an increase in heart rate and/or a decrease in pulse amplitude. Blood pressure did not significantly change before SPI ≥ 60. Longer SPI ≥ 60 episodes were associated with lower anti-nociception anesthetic regimen. Different methods of sympathetic tone assessment during general anesthesia provide conflicting information. Prospective studies should be undertaken to clarify the clinical indications of both techniques.
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Affiliation(s)
- Aline Defresne
- GIGA - Consciousness, Anesthesia and Intensive Care Medicine Laboratory, University and CHU University Hospital of Liege, Liege, Belgium.,Department of Anaesthesia and Intensive Care Medicine, CHU University Hospital of Liege, Liege, Belgium.,University Department of Anaesthesia and Intensive Care Medicine, CHR Citadelle, Bd du 12eme de Ligne, 1, Liege, 4000, Belgium
| | - Michael Harrison
- Department of Surgery and Anaesthesia, University of Otago, Wellington, New Zealand
| | - François Clement
- Department of Anesthesiology, Erasme University Hospital, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Luc Barvais
- Department of Anesthesiology, Erasme University Hospital, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Vincent Bonhomme
- GIGA - Consciousness, Anesthesia and Intensive Care Medicine Laboratory, University and CHU University Hospital of Liege, Liege, Belgium. .,Department of Anaesthesia and Intensive Care Medicine, CHU University Hospital of Liege, Liege, Belgium. .,University Department of Anaesthesia and Intensive Care Medicine, CHR Citadelle, Bd du 12eme de Ligne, 1, Liege, 4000, Belgium.
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Abad-Gurumeta A, Ripollés-Melchor J, Casans-Francés R, Calvo-Vecino JM. Monitoring of nociception, reality or fiction? ACTA ACUST UNITED AC 2017; 64:406-414. [PMID: 28341079 DOI: 10.1016/j.redar.2017.01.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 01/25/2017] [Indexed: 11/18/2022]
Abstract
There are currently various projects underway that attempt to monitor the nociceptive responses caused by surgical stress and ensure patients the best analgesic conditions. The systemic response to surgical stress has repercussions in the postoperative period, such as worse pain control, delayed recovery, greater complications, longer stay in resuscitation and hospital units, and increased healthcare costs. However, treatment with higher doses of opioids than necessary may lead to slower awakening, increased drowsiness and adverse effects, as well as situations of postoperative opioid-induced hyperalgesia. There are 2 large groups of nociceptive monitoring according to the origin of the theoretical objective of monitoring response to the stimulus, that may derive from changes in the electroencephalogram or the response of the autonomic nervous system.
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Affiliation(s)
- A Abad-Gurumeta
- Servicio de Anestesiología y Reanimación, Hospital Universitario Infanta Leonor, Madrid, España.
| | - J Ripollés-Melchor
- Servicio de Anestesiología y Reanimación, Hospital Universitario Infanta Leonor, Madrid, España
| | - R Casans-Francés
- Servicio de Anestesiología y Reanimación, Hospital Clínico Universitario Lozano Blesa, Zaragoza, España
| | - J M Calvo-Vecino
- Servicio de Anestesiología y Reanimación, Hospital Universitario de Salamanca, Salamanca, España
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Reliability of the surgical Pleth index for assessment of postoperative pain: a pilot study. Eur J Anaesthesiol 2015; 32:44-8. [PMID: 24827966 DOI: 10.1097/eja.0000000000000095] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Postoperative pain control is essential and may have a beneficial effect on postoperative outcome and morbidity. Analgesia quality is controlled using tools such as a Numerical Rating Scale (NRS). These tools require cooperation and often fail in the presence of reduced awareness. The Surgical Pleth index (SPI) has been introduced as a monitoring tool for intraoperative pain under general anaesthesia. OBJECTIVE We investigated the correlation between SPI and pain intensity, analgesic consumption and fitness for discharge in the postanaesthesia care unit. DESIGN An observational study. SETTING The central postanaesthesia care unit of our tertiary care hospital. PATIENTS Written informed consent was obtained from 100 patients scheduled for elective surgery under general anaesthesia. Patients below the age of 18 years and those with an abnormal cardiac rhythm were excluded from the study. INTERVENTION Patients were interviewed every 10 min for 2 h. MAIN OUTCOME MEASURES Pain intensity measured by NRS, discomfort and Aldrete and Post-Anaesthetic Discharge Scoring System (PADSS) scores were noted. SPI and total dose of opioids administered were recorded. RESULTS A total of 1300 pain measurements were recorded; 482 (37%) reflected no or mild pain (NRS 0 to 3), 532 (41%) moderate pain (NRS 4 to 6) and 286 (22%) severe pain (NRS 7 to 10). Both NRS (r = 0.62, P < 0.001) and SPI (r = 0.38, P < 0.001) correlated significantly with total opioid consumption. SPI showed a moderate correlation with NRS (r = 0.49, P < 0.001). Receiver operating characteristic analysis showed moderate sensitivity and specificity for discrimination between low and moderate pain (NRS ≤3) (sensitivity 67%, specificity 69% for SPI ≤45), and between moderate and severe pain (NRS >6) (sensitivity 72%, specificity 72% for SPI ≥57). SPI and NRS showed weak negative correlations with Aldrete and PADSS scores. CONCLUSION Sensitivity and specificity of SPI to discriminate between low, moderate and severe pain levels was moderate. Both NRS and SPI correlated significantly with total opioid consumption.
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Pulse Photoplethysmographic Analysis Estimates the Sympathetic Activity Directed to Heart and Vessels. Anesthesiology 2015; 123:336-45. [PMID: 26035252 DOI: 10.1097/aln.0000000000000712] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Novel pulse photoplethysmographic-derived indices have been proposed as tools to measure autonomic nervous system (ANS) modulation in anesthetized and awake patients, but nowadays their experimental validation is lacking. The authors aimed to investigate the ability of pulse photoplethysmographic amplitude (PPGA), ANS state (ANSS), and ANSS index (ANSSi) to measure changes of ANS modulation in response to sympathetic stimulation. METHODS Ten awake healthy volunteers underwent two passive head-up tilts at 45° and 90°. The heart rate variability (HRV) and systolic arterial pressure variability were analyzed in the frequency domain as a measure of ANS modulation directed to the heart and the vessels. HRV, baroreflex sensitivity, and pulse photoplethysmographic indices were measured at baseline and after tilt maneuvers. The agreement between HRV-derived indices and pulse photoplethysmographic indices was assessed using Bland-Altman plots. RESULTS PPGA, ANSS, and ANSSi changed significantly during the study protocol. Head-up tilt decreased PPGA and ANSS and increased ANNSi. There was a good agreement between ANSSi and baroreflex sensitivity explored in the high-frequency band (bias, 0.23; 95% CI, -22.7 to 23.2 normalized units) and between ANSSi and the sympathovagal modulation directed to the heart (bias, 0.96; 95% CI, -8.7 to 10.8 normalized units). CONCLUSIONS In controlled experimental conditions, novel pulse plethysmographic indices seem to estimate the changes of the sympathetic outflow directed to the vessels and the sympathovagal balance modulating heart rate. These indices might be useful in the future to monitor the fluctuation of sympathetic activity in anesthetized patients.
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Cowen R, Stasiowska MK, Laycock H, Bantel C. Assessing pain objectively: the use of physiological markers. Anaesthesia 2015; 70:828-47. [PMID: 25772783 DOI: 10.1111/anae.13018] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2015] [Indexed: 12/14/2022]
Abstract
Pain diagnosis and management would benefit from the development of objective markers of nociception and pain. Current research addressing this issue has focused on five main strategies, each with its own advantages and disadvantages. These encompass: (i) monitoring changes in the autonomic nervous system; (ii) biopotentials; (iii) neuroimaging; (iv) biological (bio-) markers; and (v) composite algorithms. Although each strategy has shown areas of promise, there are currently no validated objective markers of nociception or pain that can be recommended for clinical use. This article introduces the most important developments in the field and highlights shortcomings, with the aim of allowing the reader to make informed decisions about what trends to watch in the future.
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Affiliation(s)
- R Cowen
- Chelsea and Westminster NHS Foundation Trust, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital Campus, London, UK
| | - M K Stasiowska
- National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
| | - H Laycock
- Chelsea and Westminster NHS Foundation Trust, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital Campus, London, UK
| | - C Bantel
- Chelsea and Westminster NHS Foundation Trust, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital Campus, London, UK
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Colombo R, Marchi A, Borghi B, Fossali T, Tobaldini E, Guzzetti S, Raimondi F. Influence of gravitational sympathetic stimulation on the Surgical Plethysmographic Index. Physiol Res 2014; 64:183-9. [PMID: 25317683 DOI: 10.33549/physiolres.932798] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Surgical Plethysmographic Index (SPI), calculated from pulse photo-plethysmographic amplitude oscillations, has been proposed as a tool to measure nociception anti-nociception balance during general anesthesia, but it is affected by several confounding factor that alter the autonomic nervous system (ANS) modulation. We hypothesized that SPI may be mainly affected by sympathetic stimulation independently from nociception. We studied the effects of two sympathetic stimuli on SPI, delivered through passive head-up tilt at 45 and 90 degrees angles, in nine awake healthy adults. The sympathetic modulation was assessed by means of heart rate variability (HRV) analysis. Mean (SD) SPI significantly increased from baseline to 45 degrees [from 38.6 (13.7) to 60.8 (7.6), p<0.001)] and to 90 degrees angle tilt [82.3 (5.4), p<0.001]. The electrocardiographic mean R-to-R interval significantly shortened during both passive tilts, whereas systolic arterial pressure did not change during the study protocol. HRV changed significantly during the study protocol towards a predominance of sympathetic modulation during passive tilt. Gravitational sympathetic stimulation at two increasing angles, in absence of any painful stimuli, affects SPI in awake healthy volunteers. SPI seems to reflect the sympathetic outflow directed to peripheral vessels.
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Affiliation(s)
- R Colombo
- Anesthesiology and Intensive Care Unit, Azienda Ospedaliera "L. Sacco", Milano, Italy.
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Marchant N, Sanders R, Sleigh J, Vanhaudenhuyse A, Bruno MA, Brichant JF, Laureys S, Bonhomme V. How electroencephalography serves the anesthesiologist. Clin EEG Neurosci 2014; 45:22-32. [PMID: 24415399 DOI: 10.1177/1550059413509801] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Major clinical endpoints of general anesthesia, such as the alteration of consciousness, are achieved through effects of anesthetic agents on the central nervous system, and, more precisely, on the brain. Historically, clinicians and researchers have always been interested in quantifying and characterizing those effects through recordings of surface brain electrical activity, namely electroencephalography (EEG). Over decades of research, the complex signal has been dissected to extract its core substance, with significant advances in the interpretation of the information it may contain. Methodological, engineering, statistical, mathematical, and computer progress now furnishes advanced tools that not only allow quantification of the effects of anesthesia, but also shed light on some aspects of anesthetic mechanisms. In this article, we will review how advanced EEG serves the anesthesiologist in that respect, but will not review other intraoperative utilities that have no direct relationship with consciousness, such as monitoring of brain and spinal cord integrity. We will start with a reminder of anesthestic effects on raw EEG and its time and frequency domain components, as well as a summary of the EEG analysis techniques of use for the anesthesiologist. This will introduce the description of the use of EEG to assess the depth of the hypnotic and anti-nociceptive components of anesthesia, and its clinical utility. The last part will describe the use of EEG for the understanding of mechanisms of anesthesia-induced alteration of consciousness. We will see how, eventually in association with transcranial magnetic stimulation, it allows exploring functional cerebral networks during anesthesia. We will also see how EEG recordings during anesthesia, and their sophisticated analysis, may help corroborate current theories of mental content generation.
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Affiliation(s)
- Nicolas Marchant
- Department of Anesthesia and Intensive Care Medicine, CHU Liege, Liege, Belgium
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Monitoring the nociception–anti-nociception balance. Best Pract Res Clin Anaesthesiol 2013; 27:235-47. [DOI: 10.1016/j.bpa.2013.06.007] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 06/17/2013] [Accepted: 06/19/2013] [Indexed: 12/20/2022]
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Gruenewald M, Ilies C, Herz J, Schoenherr T, Fudickar A, Höcker J, Bein B. Influence of nociceptive stimulation on analgesia nociception index (ANI) during propofol-remifentanil anaesthesia. Br J Anaesth 2013; 110:1024-30. [PMID: 23471754 DOI: 10.1093/bja/aet019] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Measurement of the balance between nociception and anti-nociception during anaesthesia is challenging and not yet clinically established. The Surgical pleth index (SPI), derived from photoplethysmography, was proposed as a surrogate measure of nociception. Recently, the analgesia nociception index (ANI) derived by heart rate (HR) variability was developed. The aim of the present study was to challenge the ability of ANI compared with SPI to detect standardized noxious stimulation during propofol-remifentanil anaesthesia. METHODS After Ethics approval and informed consent, 25 patients were anaesthetized with propofol [bispectral index (BIS) 30-60]. A laryngeal mask (LMA) was inserted and remifentanil stepwise increased to effect-site concentrations (Ce(remi)) of 0, 2, and 4 ng ml(-1). At each step, tetanic stimulation (STIM) was applied. ANI, SPI, BIS, HR, and mean arterial pressure (MAP) were obtained before and after LMA insertion and each STIM. Analysis was performed using Wilcoxon rank tests and calculation of prediction probabilities (P(K)). RESULTS ANI and SPI, but not BIS, HR, or MAP, were significantly (P<0.05) changed at all examined steps. ANI response to STIM was (median [IQR]) -24 [-12-35], -30 [-20 - -40] and -13 [-5 - -27] at 0, 2 and 4 ng ml(-1) Ce(remi). However, prediction of movement to STIM was not better than by chance, as P(K) values were 0.41 (0.08) for ANI and 0.62 (0.08) for SPI. CONCLUSIONS The two variables, ANI and SPI, enabled consistent reflection of stimulation during propofol-remifentanil anaesthesia. Nevertheless, ANI and SPI may improve detection but not prediction of a possible inadequate nociception-anti-nociception balance. Clinicaltrials.gov Identifier. NCT01522508.
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Affiliation(s)
- M Gruenewald
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital Schleswig Holstein Campus Kiel, Schwanenweg 21, D-24105 Kiel, Germany.
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Ellerkmann RK, Grass A, Hoeft A, Soehle M. The Response of the Composite Variability Index to a Standardized Noxious Stimulus During Propofol-Remifentanil Anesthesia. Anesth Analg 2013; 116:580-8. [DOI: 10.1213/ane.0b013e31827ced18] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Jansen L, Gibson M, Bowles BC, Leach J. First do no harm: interventions during childbirth. J Perinat Educ 2013; 22:83-92. [PMID: 24421601 PMCID: PMC3647734 DOI: 10.1891/1058-1243.22.2.83] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Although medical and technological advances in maternity care have drastically reduced maternal and infant mortality, these interventions have become commonplace if not routine. Used appropriately, they can be life-saving procedures. Routine use, without valid indications, can transform childbirth from a normal physiologic process and family life event into a medical or surgical procedure. Every intervention presents the possibility of untoward effects and additional risks that engender the need for more interventions with their own inherent risks. Unintended consequences to intrapartum interventions make it imperative that nurse educators work with other professionals to promote natural childbirth processes and advocate for policies that focus on ensuring informed consent and alternative choices. Interdisciplinary collaboration can ensure that intrapartum caregivers "first do no harm."
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The effect of atropine on the bispectral index response to endotracheal intubation during propofol and remifentanil anesthesia. J Clin Monit Comput 2012; 27:157-61. [PMID: 23108496 DOI: 10.1007/s10877-012-9407-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Accepted: 10/16/2012] [Indexed: 10/27/2022]
Abstract
Atropine has been reported to increase the propofol requirements for the induction of anesthesia during continuous infusion of propofol. We investigated the influence of atropine on the bispectral index (BIS) response to endotracheal intubation during anesthetic induction with propofol and remifentanil target controlled infusion (TCI). Fifty-six patients aged 18-50 years undergoing general anesthesia, were enrolled. For induction of anesthesia, propofol TCI was set at a target effect-site concentration of 4.0 μg/ml. Two minutes later, remifentanil was started at an effect-site concentration of 4.0 ng/ml. Four minutes after the start of propofol TCI, patients received either atropine (10 μg/kg) or an equal volume of normal saline. Tracheal intubation was performed 10 min after anesthetic induction. Mean arterial pressure, HR, SpO2, and BIS were recorded during the 15 min-anesthesia induction. From 2 to 5 min after tracheal intubation, BIS was significantly higher in the atropine group than in the control group (p = 0.043, 0.033, 0.049, and 0.001, respectively). When compared with baseline values (immediately before intubation), BIS showed a significant increase at 1 min after intubation in both groups, without intergroup differences, whereas it decreased significantly from 4 to 5 min after intubation only in the control group. This study demonstrated that atropine maintained BIS increases in response to endotracheal intubation during anesthetic induction with propofol and remifentanil TCI, although the maximal response did not differ between the groups.
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Lauscher P, Kertscho H, Enselmann P, Lauscher S, Habler O, Meier J. Effects of alterations of inspiratory oxygen fractions on heart rate variability. Br J Anaesth 2012; 108:402-8. [DOI: 10.1093/bja/aer404] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Ilies C, Ludwigs J, Gruenewald M, Thee C, Hanf J, Hanss R, Steinfath M, Bein B. The effect of posture and anaesthetic technique on the surgical pleth index. Anaesthesia 2012; 67:508-513. [DOI: 10.1111/j.1365-2044.2011.07051.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
| | - J. Ludwigs
- Medical Student, Christian‐Albrechts‐University, Kiel, Germany
| | | | | | - J. Hanf
- Medical Student, Christian‐Albrechts‐University, Kiel, Germany
| | | | - M. Steinfath
- Professor of Anaesthesia and Chair, Department of Anaesthesia and Intensive Care Medicine, University‐Hospital Schleswig‐Holstein, Campus Kiel, Germany
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