Acute and Critical Care

Original Article

Pharmacology
Inhalation sedation for postoperative patients in the intensive care unit: initial sevoflurane concentration and comparison of opioid use with propofol sedation: Seungho Jung, Sungwon Na, Hye Bin Kim, Hye Ji Joo, Jeongmin Kim; Acute Crit Care. 2020;35(3):197-204. Published online August 10, 2020; DOI: https://doi.org/10.4266/acc.2020.00213

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Background
Although the use of volatile sedatives in the intensive care unit (ICU) is increasing in Europe, it remains infrequent in Asia. Therefore, there are no clinical guidelines available. This study investigates the proper initial concentration of sevoflurane, a volatile sedative that induces a Richmond agitation-sedation scale (RASS) score of –2 to –3, in patients who underwent head and neck surgery with tracheostomy. We also compared the amount of postoperative opioid consumption between volatile and intravenous (IV) sedation.
Methods
We planned a prospective study to determine the proper initial sevoflurane concentration and a retrospective analysis to compare postoperative opioid consumption between volatile sedation and propofol sedation. Patients scheduled for head and neck surgery with tracheostomy and subsequent postoperative sedation in the ICU were enrolled.
Results
In this prospective study, the effective dose 50 (ED50) of initial end-tidal sevoflurane concentration was 0.36% (95% confidence interval [CI], 0.20 to 0.60%), while the ED 95 was 0.69% (95% CI, 0.60 to 0.75%) based on isotonic regression methods. In this retrospective study, remifentanil consumption during postoperative sedation was significantly lower in the sevoflurane group (2.52±1.00 µg/kg/hr, P=0.001) than it was in the IV propofol group (3.66±1.30 µg/kg/hr).
Conclusions
We determined the proper initial end-tidal concentration setting of sevoflurane for patients with tracheostomy who underwent head and neck surgery. Postoperative sedation with sevoflurane appears to be a valid and safe alternative to IV sedation with propofol.

Citations

Citations to this article as recorded by

Halogenated anesthetics vs intravenous hypnotics for short and long term sedation in the intensive care unit: A meta-analysis
V. Likhvantsev, G. Landoni, N. Ermokhina, M. Yadgarov, L. Berikashvili, K. Kadantseva, O. Grebenchikov, L. Okhinko, A. Kuzovlev
Medicina Intensiva.2023; 47(5): 267. CrossRef
Halogenated anesthetics vs intravenous hypnotics for short and long term sedation in the intensive care unit: A meta-analysis
V. Likhvantsev, G. Landoni, N. Ermokhina, M. Yadgarov, L. Berikashvili, K. Kadantseva, O. Grebenchikov, L. Okhinko, A. Kuzovlev
Medicina Intensiva (English Edition).2023; 47(5): 267. CrossRef
Inhaled Sedation with Volatile Anesthetics for Mechanically Ventilated Patients in Intensive Care Units: A Narrative Review
Khaled Ahmed Yassen, Matthieu Jabaudon, Hussah Abdullah Alsultan, Haya Almousa, Dur I Shahwar, Fatimah Yousef Alhejji, Zainab Yaseen Aljaziri
Journal of Clinical Medicine.2023; 12(3): 1069. CrossRef
Sedation with Sevoflurane versus Propofol in COVID-19 Patients with Acute Respiratory Distress Syndrome: Results from a Randomized Clinical Trial
Sara Martínez-Castro, Berta Monleón, Jaume Puig, Carolina Ferrer Gomez, Marta Quesada, David Pestaña, Alberto Balvis, Emilio Maseda, Alejandro Suárez de la Rica, Ana Monero Feijoo, Rafael Badenes
Journal of Personalized Medicine.2023; 13(6): 925. CrossRef
Effect of inhaled anaesthetics on cognitive and psychiatric outcomes in critically ill adults: a systematic review and meta-analysis
Sean Cuninghame, Angela Jerath, Kevin Gorsky, Asaanth Sivajohan, Conall Francoeur, Davinia Withington, Lisa Burry, Brian H. Cuthbertson, Beverley A. Orser, Claudio Martin, Adrian M. Owen, Marat Slessarev, Martin Chapman, Damon Scales, Julie Nardi, Beth Li
British Journal of Anaesthesia.2023; 131(2): 314. CrossRef
Experiencia y revisión de la literatura del uso del dispositivo Anesthetic Conserving Device (AnaConDa) durante la pandemia en pacientes con neumonía por COVID-19 en un hospital público
María Guadalupe Morales Hernández, Marcelo Díaz Conde, Ixchel Magaña Matienzo
Medicina Crítica.2023; 37(4): 334. CrossRef
Sedation of patients in intensive care units. Guidelines
V.I. Potievskaya, I.B. Zabolotskikh, I.E. Gridchik, A.I. Gritsan, A.A. Eremenko, I.A. Kozlov, A.L. Levit, V.A. Mazurok, I.V. Molchanov
Anesteziologiya i reanimatologiya.2023; (5): 6. CrossRef
Inhaled volatile anesthetics in the intensive care unit
Erin D Wieruszewski, Mariam ElSaban, Patrick M Wieruszewski, Nathan J Smischney
World Journal of Critical Care Medicine.2023;[Epub] CrossRef
Prospects of inhalation sedation in intensive care
O.A. Grebenchikov, V.V. Kulabukhov, A.K. Shabanov, O.V. Ignatenko, V.V. Antonova, R.A. Cherpakov, I.V. Redkin, E.A. Boeva, A.N. Kuzovlev
Anesteziologiya i reanimatologiya.2022; (3): 84. CrossRef
Análisis nacional de la sedación aplicada en pacientes de cuidados críticos
Grace Pamela López Pérez, Melani Dayana Carrera Casa, Gissela Lizbeth Amancha Moyulema, Yadira Nathaly Chicaiza Quilligana, Ana Belén Guamán Tacuri, Joselyn Mireya Iza Arias
Salud, Ciencia y Tecnología.2022; 2(S1): 234. CrossRef

Case Report

Delayed Onset of Malignant Hyperthermia: A Case Report: Jeong Wook Lim, Seok Kon Yeo, Seong Hwan Yang, In Seok Hwang, Jong Soo Lee; Korean J Crit Care Med. 2009;24(3):168-171.; DOI: https://doi.org/10.4266/kjccm.2009.24.3.168

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Abstract PDF: Malignant hyperthermia is a potentially fatal genetic and metabolic myopathy that presents with high fever, and muscle rigidity, and it often occurs after administering anesthetic medication. Most cases of malignant hyperthermia occur during anesthesia or surgery, but delayed malignant hyperthermia is very rare, and if it is detected late, it has a high mortality rate. A 39-year-old male with an acute subdural hematoma underwent decompressive craniectomy without any intraoperative medical problems, but a high fever above 40degrees C occurred after 8 hours and he was dead in spite of aggressive management after 48 hours postoperatively. We present here a case of delayed malignant hyperthermia along with a review of the related literature.

Original Articles

The Changes of Regional Cerebral Blood Flow according to Inhalational Anesthetic Agents after Transient Bilateral Carotid Artery Occlusion in the Rabbit: Hyeong Geun Joo, Hae Kyu Kim; Korean J Crit Care Med. 2005;20(2):121-130.

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Abstract PDF: BACKGROUND
Cerebral hyperperfusion syndrome is a recognized complication of carotid endarterectomy, with a reported incidence of 0.3 to 1.2%. Monitoring of regional cerebral blood flow (rCBF) may limit neurological damage. This study was planned to investigate the changes of rCBF according to inhalational anesthetic agents. METHODS: 2.40+/-0.04 kg weighed New Zealand White Rabbits were undergone transient brain ischemia by bilateral carotid artery ligation for 20 minutes. The rCBF was measured by Bowman Perfusion Monitor.
RESULTS
The value of rCBF in pre-ligation state was not significantly different among the three groups. rCBF in sevoflurane group was decreased to 46% of baseline value during ischemia and increased to 143% just after reperfusion. rCBFs in isoflurane and enflurane groups were abruptly increased instead of decrease like sevoflurane group. The values of rCBF was more increasing after reperfusion in isoflurane and enflurane groups. rCBFs in all groups were return to baseline value 10 minutes after reperfusion. CONCLUSIONS: This results was suggested that sevoflurane might be contributed to create a neurologic damage during ischemia and the hyperperfusion was seen in all three anesthetic agents. The clinical investigation may be needed to establish the value of this experiment.

The Effect of Sevoflurane and Propofol on Expression of Inducible Nitric Oxide Synthase in Endotoxemic Rats: Cheul Hong Kim, Joo Hyeuk Park, Seung Hoon Baek, Seong Wan Baik; Korean J Crit Care Med. 2004;19(2):106-114.

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Abstract PDF: BACKGROUND
It is a well-known phenomenon that alveolar and peritoneal macrophages exposed to bacterial lipopolysaccharide (LPS) induce a large output of nitric oxide (NO) and an inducible nitric oxide synthase (iNOS) mRNA expression. The purpose of this study is actually how much NO production and iNOS mRAN expression are effected by anesthetics (sevoflurane and propofol) on endotoxemic rats.
METHODS
To examine the production of NO in peritoneal macrophages, NO concentration were measured from the rats following 2 hours exposure to LPS and 2 hours administration of sevoflurane and propofol, respectively. Culture supernatants were collected 24 hours after exposure to LPS and anesthetics and assayed by ELISA (Enzyme Linked Immunosorbent Assay) for production of NO. The iNOS mRNA expression was measured using PCR (Polymerase Chain Reaction) techniques and autoradiography. RESULTS: In the control group, the NO concentration was measured at 2 hours after infusion of LPS to rats, and showed 12 4micrometer. After insufflations of anesthetics to experimental animals, NO concentration increased in the sevoflurane and propofol groups, 37 13 (p<0.05) and 29 12micrometer (p<0.05) respectively. The size and brightness of the iNOS mRAN bands were distinct in sevoflurane and propofol in order.
CONCLUSIONS
There were no different in regard of NO production and hemodynamic changes but iNOS mRNA expression between sevoflurane and propofol group in endotoxemic rats. The mechanism is not clear, but it is related to the strong stimulating effects on the respiratory tract of inhalation anesthetics.

Effects of Sevoflurane and Ischemic Preconditioning on Neurologic Injury and Bcl-2 Family Protein mRNA Expression after Transient Spinal Ischemia in the Rats: Soon Hwan Kang, Eun Soo Kim, Seung Hoon Baek, Jae Young Kwon; Korean J Crit Care Med. 2004;19(1):20-31.

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Abstract PDF: BACKGROUND
Spinal cord injury occurring as the result of surgical repair of thoracic and thoracoabdominal aortic disease remains a devastating complication. Anesthetic and ischemic preconditioning have been known to prevent ischemic injury. The purpose of this study was to elucidate the effects of sevoflurane and ischemic preconditioning (IPC) on neurologic outcome, DNA fragmentation and Bcl-2 protein gene expression in transient spinal ischemia. METHODS: Rats were anesthetized with enflurane or sevoflurane, divided by 5 groups: Sevoflurane group and enflurane group (13 minutes of ischemia), Control group, Rapid group, Delayed group (15 minutes of ischemia). Spinal ischemia was produced by both induced hypotension and thoracic aortic cross clamping. Neurologic scores were assessed at the time of recovery and 1, 2, 3, 24 hours after transient spinal ischemia. After 24 hours, rats were euthenized and spinal cords were removed for the assay of DNA fragmentation. Other groups of rats received 5 minutes of ischemia, and after 1, 6, 24, 48 and 72 hours, spinal cords were removed for the assay of Bcl-2 family protein mRNA and DNA fragmentation. RESULTS: The neurologic injury and DNA fragmentation of sevoflurane group were significantly lesser than enflurane group. 5 minutes of IPC caused increase in Bcl-xl protein mRNA transcription at 48 and 72 hours reperfusion. There were no significant changes in neurologic injury, Bcl-2 family mRNA transcription and DNA fragmentation between control group, rapid group, and delayed group. CONCLUSIONS: Sevoflurane was effective in preventing neurologic injury after 13 minutes of transient spinal ischemia. However, rapid and delayed ischemic preconditioning did not potentiated neuroprotective action of sevoflurane during 15 minutes of spinal ischemia.

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