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Assessment of explicit and implicit memories during remimazolam anaesthesia using the process dissociation procedure: A prospective cohort study

BACKGROUND: Memory formation during remimazolam anaesthesia, where a bispectral index (BIS) is sometimes not maintained at less than 60 despite the maximal dose, is worthy of evaluation. OBJECTIVE: Investigate the formation of explicit and implicit memories using the process dissociation procedure d...

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Autores principales: Kim, Kyung Mi, Bang, Ji-Yeon, Choi, Byung-Moon, Noh, Gyu-Jeong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Lippincott Williams & Wilkins 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10552814/
https://www.ncbi.nlm.nih.gov/pubmed/37747426
http://dx.doi.org/10.1097/EJA.0000000000001904
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author Kim, Kyung Mi
Bang, Ji-Yeon
Choi, Byung-Moon
Noh, Gyu-Jeong
author_facet Kim, Kyung Mi
Bang, Ji-Yeon
Choi, Byung-Moon
Noh, Gyu-Jeong
author_sort Kim, Kyung Mi
collection PubMed
description BACKGROUND: Memory formation during remimazolam anaesthesia, where a bispectral index (BIS) is sometimes not maintained at less than 60 despite the maximal dose, is worthy of evaluation. OBJECTIVE: Investigate the formation of explicit and implicit memories using the process dissociation procedure during remimazolam anaesthesia at a BIS of 60 to 80. DESIGN: A prospective cohort study. SETTING: A tertiary medical centre in Seoul, South Korea, between March 2022 and July 2022. PATIENTS: One hundred patients undergoing general anaesthesia using remimazolam. INTERVENTIONS: The BIS was maintained at 60 to 80 during anaesthesia induction with remimazolam. Words were spoken to patients via headphones for 15 min. MAIN OUTCOME MEASURE: The primary outcome was the probability of explicit or implicit memory formation as calculated using the original and extended models, within 24 h after word presentation. Conscious recall memory was assessed using a short-structured interview within 1 and 24 h after surgery. Memory formation was inferred to be absent if 0 was included in the 95% confidence interval (CI) of the probability. RESULTS: The main results showed no evidence of explicit or implicit memory. The 95% CI of the probability of explicit memory formation included 0 for both models, –0.01 (–0.04 to 0.02) and –0.04 (–0.10 to 0.01), respectively. The 95% CI of the probability of implicit memory formation did not include 0 when evaluated using the original model, 0.08 (0.06 to 0.10), but included 0 when evaluated using the extended model, 0.00 (–0.03 to 0.03). The modified Brice interview revealed no evidence of awareness. CONCLUSIONS: There was no evidence of explicit or implicit memory formation during remimazolam anaesthesia (BIS 60 to 80). Further research is warranted to establish whether explicit and implicit memories are still absent even in the presence of surgical stimulation. CLINICAL TRIAL REGISTRATION: KCT0006752 (http://cris.nih.go.kr)
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spelling pubmed-105528142023-10-06 Assessment of explicit and implicit memories during remimazolam anaesthesia using the process dissociation procedure: A prospective cohort study Kim, Kyung Mi Bang, Ji-Yeon Choi, Byung-Moon Noh, Gyu-Jeong Eur J Anaesthesiol Anaesthesia-Perioperative medicine BACKGROUND: Memory formation during remimazolam anaesthesia, where a bispectral index (BIS) is sometimes not maintained at less than 60 despite the maximal dose, is worthy of evaluation. OBJECTIVE: Investigate the formation of explicit and implicit memories using the process dissociation procedure during remimazolam anaesthesia at a BIS of 60 to 80. DESIGN: A prospective cohort study. SETTING: A tertiary medical centre in Seoul, South Korea, between March 2022 and July 2022. PATIENTS: One hundred patients undergoing general anaesthesia using remimazolam. INTERVENTIONS: The BIS was maintained at 60 to 80 during anaesthesia induction with remimazolam. Words were spoken to patients via headphones for 15 min. MAIN OUTCOME MEASURE: The primary outcome was the probability of explicit or implicit memory formation as calculated using the original and extended models, within 24 h after word presentation. Conscious recall memory was assessed using a short-structured interview within 1 and 24 h after surgery. Memory formation was inferred to be absent if 0 was included in the 95% confidence interval (CI) of the probability. RESULTS: The main results showed no evidence of explicit or implicit memory. The 95% CI of the probability of explicit memory formation included 0 for both models, –0.01 (–0.04 to 0.02) and –0.04 (–0.10 to 0.01), respectively. The 95% CI of the probability of implicit memory formation did not include 0 when evaluated using the original model, 0.08 (0.06 to 0.10), but included 0 when evaluated using the extended model, 0.00 (–0.03 to 0.03). The modified Brice interview revealed no evidence of awareness. CONCLUSIONS: There was no evidence of explicit or implicit memory formation during remimazolam anaesthesia (BIS 60 to 80). Further research is warranted to establish whether explicit and implicit memories are still absent even in the presence of surgical stimulation. CLINICAL TRIAL REGISTRATION: KCT0006752 (http://cris.nih.go.kr) Lippincott Williams & Wilkins 2023-11 2023-09-25 /pmc/articles/PMC10552814/ /pubmed/37747426 http://dx.doi.org/10.1097/EJA.0000000000001904 Text en Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the European Society of Anaesthesiology and Intensive Care. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal. http://creativecommons.org/licenses/by-nc-nd/4.0 (https://creativecommons.org/licenses/by-nc-nd/4.0/)
spellingShingle Anaesthesia-Perioperative medicine
Kim, Kyung Mi
Bang, Ji-Yeon
Choi, Byung-Moon
Noh, Gyu-Jeong
Assessment of explicit and implicit memories during remimazolam anaesthesia using the process dissociation procedure: A prospective cohort study
title Assessment of explicit and implicit memories during remimazolam anaesthesia using the process dissociation procedure: A prospective cohort study
title_full Assessment of explicit and implicit memories during remimazolam anaesthesia using the process dissociation procedure: A prospective cohort study
title_fullStr Assessment of explicit and implicit memories during remimazolam anaesthesia using the process dissociation procedure: A prospective cohort study
title_full_unstemmed Assessment of explicit and implicit memories during remimazolam anaesthesia using the process dissociation procedure: A prospective cohort study
title_short Assessment of explicit and implicit memories during remimazolam anaesthesia using the process dissociation procedure: A prospective cohort study
title_sort assessment of explicit and implicit memories during remimazolam anaesthesia using the process dissociation procedure: a prospective cohort study
topic Anaesthesia-Perioperative medicine
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10552814/
https://www.ncbi.nlm.nih.gov/pubmed/37747426
http://dx.doi.org/10.1097/EJA.0000000000001904
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