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Müller-Wirtz LM, O'Gara B, Gama de Abreu M, Schultz MJ, Beitler JR, Jerath A, Meiser A. Volatile anesthetics for lung- and diaphragm-protective sedation. Crit Care 2024; 28:269. [PMID: 39217380 PMCID: PMC11366159 DOI: 10.1186/s13054-024-05049-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Accepted: 07/30/2024] [Indexed: 09/04/2024] Open
Abstract
This review explores the complex interactions between sedation and invasive ventilation and examines the potential of volatile anesthetics for lung- and diaphragm-protective sedation. In the early stages of invasive ventilation, many critically ill patients experience insufficient respiratory drive and effort, leading to compromised diaphragm function. Compared with common intravenous agents, inhaled sedation with volatile anesthetics better preserves respiratory drive, potentially helping to maintain diaphragm function during prolonged periods of invasive ventilation. In turn, higher concentrations of volatile anesthetics reduce the size of spontaneously generated tidal volumes, potentially reducing lung stress and strain and with that the risk of self-inflicted lung injury. Taken together, inhaled sedation may allow titration of respiratory drive to maintain inspiratory efforts within lung- and diaphragm-protective ranges. Particularly in patients who are expected to require prolonged invasive ventilation, in whom the restoration of adequate but safe inspiratory effort is crucial for successful weaning, inhaled sedation represents an attractive option for lung- and diaphragm-protective sedation. A technical limitation is ventilatory dead space introduced by volatile anesthetic reflectors, although this impact is minimal and comparable to ventilation with heat and moisture exchangers. Further studies are imperative for a comprehensive understanding of the specific effects of inhaled sedation on respiratory drive and effort and, ultimately, how this translates into patient-centered outcomes in critically ill patients.
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Affiliation(s)
- Lukas M Müller-Wirtz
- Department of Anesthesiology, Outcomes Research Consortium, Cleveland Clinic, Cleveland, OH, USA
- Department of Anesthesiology, Intensive Care and Pain Therapy, Faculty of Medicine, Saarland University Medical Center and Saarland University, Homburg, Saarland, Germany
- Department of Anesthesiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, University Hospital Erlangen, Erlangen, Germany
| | - Brian O'Gara
- Department of Anesthesia, Critical Care, and Pain Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Marcelo Gama de Abreu
- Department of Anesthesiology, Outcomes Research Consortium, Cleveland Clinic, Cleveland, OH, USA
- Division of Intensive Care and Resuscitation, Department of Anesthesiology, Cleveland Clinic, Cleveland, OH, USA
- Division of Cardiothoracic Anesthesiology, Department of Anesthesiology, Cleveland Clinic, Cleveland, OH, USA
| | - Marcus J Schultz
- Department of Intensive Care, Amsterdam University Medical Center, Amsterdam, The Netherlands
- Department of Anesthesiology, Intensive Care Medicine and Pain Medicine, Division of Cardiac Thoracic Vascular Anesthesia and Intensive Care Medicine, Medical University of Vienna, Vienna, Austria
| | - Jeremy R Beitler
- Columbia Respiratory Critical Care Trials Group, New York-Presbyterian Hospital and Columbia University, New York, NY, USA
| | - Angela Jerath
- Department of Anesthesiology and Pain Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Department of Anesthesia, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Andreas Meiser
- Department of Anesthesiology, Intensive Care and Pain Therapy, Faculty of Medicine, Saarland University Medical Center and Saarland University, Homburg, Saarland, Germany.
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O'Gara B, Boncyk C, Meiser A, Jerath A, Bellgardt M, Jabaudon M, Beitler JR, Hughes CG. Volatile Anesthetic Sedation for Critically Ill Patients. Anesthesiology 2024; 141:163-174. [PMID: 38860793 DOI: 10.1097/aln.0000000000004994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
Volatile anesthetics have multiple properties that make them useful for sedation in the intensive care unit. The team-based approach to volatile anesthetic sedation leverages these properties to provide a safe and effective alternative to intravenous sedatives.
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Affiliation(s)
- Brian O'Gara
- Beth Israel Deaconess Medical Center, Department of Anaesthesia, Critical Care, and Pain Medicine, Harvard Medical School, Boston, Massachusetts
| | - Christina Boncyk
- Vanderbilt University Medical Center, Department of Anesthesiology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Andreas Meiser
- Saarland University Hospital, Privatdozent Medical Faculty of Saarland University, Homburg, Germany
| | - Angela Jerath
- Sunnybrook Research Institute, Department of Anesthesia, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Anesthesiology and Pain Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Martin Bellgardt
- St. Josef-Hospital, University Hospital of Ruhr-University of Bochum, Bochum, Germany
| | - Matthieu Jabaudon
- University Hospital Center Clermont-Ferrand, Department of Perioperative Medicine, Clermont Auvergne University, Institute of Genetics, Reproduction, and Development, National Center for Scientific Research, National Institute of Health and Medical Research, Clermont-Ferrand, France
| | - Jeremy R Beitler
- New York Presbyterian/Columbia University Medical Center, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York
| | - Christopher G Hughes
- Vanderbilt University Medical Center, Department of Anesthesiology, Vanderbilt University School of Medicine, Nashville, Tennessee
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García-Montoto F, Paz-Martín D, Pestaña D, Soro M, Marcos Vidal JM, Badenes R, Suárez de la Rica A, Bardi T, Pérez-Carbonell A, García C, Cervantes JA, Martínez MP, Guerrero JL, Lorente JV, Veganzones J, Murcia M, Belda FJ. Guidelines for inhaled sedation in the ICU. REVISTA ESPANOLA DE ANESTESIOLOGIA Y REANIMACION 2024; 71:90-111. [PMID: 38309642 DOI: 10.1016/j.redare.2024.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 07/29/2023] [Indexed: 02/05/2024]
Abstract
INTRODUCTION AND OBJECTIVES Sedation is used in intensive care units (ICU) to improve comfort and tolerance during mechanical ventilation, invasive interventions, and nursing care. In recent years, the use of inhalation anaesthetics for this purpose has increased. Our objective was to obtain and summarise the best evidence on inhaled sedation in adult patients in the ICU, and use this to help physicians choose the most appropriate approach in terms of the impact of sedation on clinical outcomes and the risk-benefit of the chosen strategy. METHODOLOGY Given the overall lack of literature and scientific evidence on various aspects of inhaled sedation in the ICU, we decided to use a Delphi method to achieve consensus among a group of 17 expert panellists. The processes was conducted over a 12-month period between 2022 and 2023, and followed the recommendations of the CREDES guidelines. RESULTS The results of the Delphi survey form the basis of these 39 recommendations - 23 with a strong consensus and 15 with a weak consensus. CONCLUSION The use of inhaled sedation in the ICU is a reliable and appropriate option in a wide variety of clinical scenarios. However, there are numerous aspects of the technique that require further study.
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Affiliation(s)
- F García-Montoto
- UCI de Anestesia, Servicio de Anestesiología y Reanimación, Complejo Hospitalario Universitario de Cáceres, Cáceres, Spain.
| | - D Paz-Martín
- UCI, Departamento de Anestesia y Cuidados Intensivos, Clínica Universidad de Navarra, Pamplona, Navarra, Spain
| | - D Pestaña
- UCI de Anestesia, Servicio de Anestesiología y Reanimación, Hospital Universitario Ramon y Cajal, Madrid, Spain; Universidad de Alcalá de Henares, Alcalá de Henares, Madrid, Spain
| | - M Soro
- UCI, Servicio de Anestesiología y Cuidados Intensivos, Hospital IMED, Valencia, Spain
| | - J M Marcos Vidal
- Unidad de Reanimación, Servicio de Anestesiología y Reanimación, Complejo Asistencial Universitario de León, León, Spain
| | - R Badenes
- Departamento Cirugía, Facultad de Medicina, Universidad de Valencia, Valencia, Spain; UCI de Anestesia, Servicio de Anestesiología, Reanimación y Terapéutica del Dolor, Hospital Clínico Universitario de Valencia, Valencia, Spain; INCLIVA Instituto de Investigación Sanitaria, Valencia, Spain
| | - A Suárez de la Rica
- Unidad de Reanimación, Servicio de Anestesiología y Reanimación, Hospital Universitario de La Princesa, Madrid, Spain
| | - T Bardi
- UCI de Anestesia, Servicio de Anestesiología y Reanimación, Hospital Universitario Ramon y Cajal, Madrid, Spain
| | - A Pérez-Carbonell
- UCI Quirúrgica, Servicio de Anestesiología, UCI Quirúrgica y Unidad del Dolor, Hospital General Universitario de Elche, Elche, Alicante, Spain
| | - C García
- UCI Quirúrgica, Servicio de Anestesiología y Reanimación, Hospital General Universitario Dr. Balmis, Alicante, Spain
| | - J A Cervantes
- Unidad de Reanimación, Servicio de Anestesiología y Reanimación, Hospital Universitario Torrecárdenas, Almería, Spain
| | - M P Martínez
- Unidad de Reanimación, Servicio de Anestesiología y Reanimación, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain
| | - J L Guerrero
- Unidad de Reanimación, Servicio de Anestesiología y Reanimación, Hospital Universitario Virgen de la Victoria, Málaga, Spain; Universidad de Málaga, Málaga, Spain; Instituto Biomédico de Málaga, Málaga, Spain
| | - J V Lorente
- Unidad de Reanimación, Servicio de Anestesiología y Reanimación, Hospital Juan Ramón Jiménez, Huelva, Spain
| | - J Veganzones
- Unidad de Reanimación, Servicio de Anestesiología y Reanimación, Hospital Universitario La Paz, Madrid, Spain
| | - M Murcia
- UCI, Servicio de Anestesiología y Cuidados Intensivos, Hospital IMED, Valencia, Spain
| | - F J Belda
- Departamento Cirugía, Facultad de Medicina, Universidad de Valencia, Valencia, Spain
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Meiser A, Meis PLF, O’Gara B, Volk T, Kermad A. Increasing the reflection efficiency of the Sedaconda ACD-S by heating and cooling the anaesthetic reflector: a bench study using a test lung. J Clin Monit Comput 2023; 37:919-924. [PMID: 36625981 PMCID: PMC9830614 DOI: 10.1007/s10877-022-00967-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 12/21/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND As volatile anaesthetic gases contribute to global warming, improving the efficiency of their delivery can reduce their environmental impact. This can be achieved by rebreathing from a circle system, but also by anaesthetic reflection with an open intensive care ventilator. We investigated whether the efficiency of such a reflection system could be increased by warming the reflector during inspiration and cooling it during expiration (thermocycling). METHODS The Sedaconda-ACD-S (Sedana Medical, Danderyd, Sweden) was connected between an intensive care ventilator and a test lung. Liquid isoflurane was infused into the device at 0.5, 1.0, 2.0 and 5.0 mL/h; ventilator settings were 500 mL tidal volume, 12 bpm, 21% oxygen. Isoflurane concentrations were measured inside the test lung after equilibration. Thermocycling was achieved by heating the breathing gas in the inspiratory hose to 37 °C via a heated humidifier without water. Breathing gas expired from the test lung was cooled to 14 °C before reaching the ACD-S. In the test lung, body temperature pressure saturated conditions prevailed. Isoflurane concentrations and reflective efficiency were compared between thermocycling and control conditions. RESULTS With thermocycling higher isoflurane concentrations in the test lung were measured for all infusion rates studied. Interpolation of data showed that for achieving 0.4 (0.6) Vol% isoflurane, the infusion rate can be reduced from 1.2 to 0.7 (2.0 to 1.2) mL/h or else to 56% (58%) of control. CONCLUSION Thermocycling of the anaesthetic gas considerably increases the efficiency of the anaesthetic reflector and reduces anaesthetic consumption by almost half in a test lung model. Given that cooling can be miniaturized, this method carries a potential for further saving anaesthetics in clinical practice in the operating theatre as well as for inhaled sedation in the ICU.
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Affiliation(s)
- Andreas Meiser
- grid.411937.9Department of Anaesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg, Saarland Germany
| | - Pierre Louis Fernando Meis
- grid.411937.9Department of Anaesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg, Saarland Germany
| | - Brian O’Gara
- grid.239395.70000 0000 9011 8547Department of Anaesthesiology, Beth Israel Deaconess Medical Center, Boston, MA USA
| | - Thomas Volk
- grid.411937.9Department of Anaesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg, Saarland Germany
| | - Azzeddine Kermad
- grid.411937.9Department of Anaesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg, Saarland Germany ,Department of Cardiac Anesthesiology and Intensive Care Medicine, German Heart Center Charité, Berlin, Germany
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Kermad A, Appenzeller M, Morinello E, Schneider SO, Kleinschmidt S, O'Gara B, Volk T, Meiser A. Reflection Versus Rebreathing for Administration of Sevoflurane During Minor Gynecological Surgery. Anesth Analg 2021; 132:1042-1050. [PMID: 32701542 DOI: 10.1213/ane.0000000000005074] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Contemporary anesthetic circle systems, when used at low fresh gas flows (FGF) to allow rebreathing of anesthetic, lack the ability for rapid dose titration. The small-scale anesthetic reflection device Anaesthetic Conserving Device (50mL Version; AnaConDa-S) permits administration of volatile anesthetics with high-flow ventilators. We compared washin, washout, and sevoflurane consumption using AnaConDa-S versus a circle system with low and minimal FGF. METHODS Forty patients undergoing breast surgery were randomized to receive 0.5 minimal alveolar concentration (MAC) sevoflurane with AnaConDa-S (21 patients, reflection group) or with a circle system (low flow: FGF = 0.2 minute ventilation [V'E], 9 patients; or minimal flow: 0.1 V'E, 10 patients). In the reflection group, syringe pump boluses were given for priming and washin; to simulate an open system, the FGF of the anesthesia ventilator was set to 18 L·min-1 with the soda lime removed. In the other groups, the FGF was increased for washin (1 V'E for 8 minutes) and washout (3 V'E). For all patients, tidal volume was 7 mL·kg-1 and the respiratory rate adjusted to ensure normoventilation. Analgesia was attained with remifentanil 0.3 µg·kg-1·min-1. Sevoflurane consumption was compared between the reflection group and the low- and minimal-flow groups, respectively, using a post hoc test (Fisher Least Significant Difference). To compare washin and washout (half-life), the low- and minimal-flow groups were combined. RESULTS Sevoflurane consumption was reduced in the reflection group (9.4 ± 2.0 vs 15.0 ± 3.5 [low flow, P < .001] vs 11.6 ± 2.3 mL·MAC h-1 [minimal flow, P = .02]); washin (33 ± 15 vs 49 ± 12 seconds, P = .001) and washout (28 ± 15 vs 55 ± 19 seconds, P < .001) times were also significantly shorter. CONCLUSIONS In this clinical setting with short procedures, low anesthetic requirements, and low tidal volumes, AnaConDa-S decreased anesthetic consumption, washin, and washout times compared to a circle system.
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Affiliation(s)
- Azzeddine Kermad
- From the Department of Anesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg/Saar, Germany
| | - Madeleine Appenzeller
- From the Department of Anesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg/Saar, Germany
| | - Emanuela Morinello
- From the Department of Anesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg/Saar, Germany
| | - Sven Oliver Schneider
- From the Department of Anesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg/Saar, Germany
| | - Stefan Kleinschmidt
- From the Department of Anesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg/Saar, Germany
| | - Brian O'Gara
- Department of Anesthesiology, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Thomas Volk
- From the Department of Anesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg/Saar, Germany
| | - Andreas Meiser
- From the Department of Anesthesiology, Intensive Care Medicine and Pain Medicine, Saarland University Hospital Medical Center, Homburg/Saar, Germany
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Comparison of the use of AnaConDa® versus AnaConDa-S® during the post-operative period of cardiac surgery under standard conditions of practice. J Clin Monit Comput 2019; 34:89-95. [PMID: 30784010 PMCID: PMC7222112 DOI: 10.1007/s10877-019-00285-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 02/13/2019] [Indexed: 01/16/2023]
Abstract
Changes have been made to the AnaConDa device (Sedana Medical, Stockholm, Sweden), decreasing its size to reduce dead space and carbon dioxide (CO2) retention. However, this also involves a decrease in the surface area of the activated carbon filter. The CO2 elimination and sevoflurane (SEV) reflection of the old device (ACD-100) were thus compared with the new version (ACD-50) in patients sedated after coronary artery bypass graft surgery. After ERC approval and written informed consent, 23 patients were sedated with SEV, using first the ACD-100 and then the ACD-50 for 60 min each. With each device, patients were ventilated with tidal volumes (TV) of 5 ml/kg of ideal body weight for the first 30 min, and with 7 ml/kg for the next 30 min. Ventilation parameters, arterial blood gases, Bispectral-Index™ (BIS, Aspect Medical Systems Inc., Newton, MA, USA), SEV concentrations exhaled by the patient (SEV-exhaled) and from the expiratory hose (SEV-lost) were recorded every 30 min. A SEV reflection index was calculated: SRI [%] = 100 × (1 − (SEV-lost/SEV-exhaled)). Data were compared using ANOVA with repeated measurements and Student’s T-tests for pairs. Respiratory rates, tidal and minute volumes were not significantly different between the two devices. End tidal and arterial CO2 partial pressures were significantly higher with the ACD-100 as compared with the ACD-50. SEV infusion rate remained constant. SEV reflection was higher (SRI: ACD-100 vs. ACD-50, TV 5 ml/kg: 95.29 ± 6.45 vs. 85.54 ± 11.15, p = 0.001; 7 ml/kg: 93.42 ± 6.55 vs. 88.77 ± 12.26, p = 0.003). BIS was significantly lower when using the higher TV (60.91 ± 9.99 vs. 66.57 ± 8.22, p = 0.012), although this difference was not clinically relevant. During postoperative sedation, the use of ACD-50 significantly reduced CO2 retention. SEV reflection was slightly reduced. However, patients remained sufficiently sedated without increasing SEV infusion.
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EOY summary 2018. J Clin Monit Comput 2019; 33:195-200. [PMID: 30652254 DOI: 10.1007/s10877-019-00256-5] [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: 01/02/2019] [Accepted: 01/02/2019] [Indexed: 10/27/2022]
Abstract
Clinical monitoring and technology are at the heart of anesthesiology, and new technological developments will help to define how anesthesiology will evolve as a profession. Anesthesia related research published in the JCMC in 2018 mainly pertained to ICU sedation with inhaled agents, anesthesia workstation technology, and monitoring of different aspects of depth of anesthesia.
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Hendrickx J, Poelaert J, De Wolf A. Sedation with inhaled agents in the ICU: what are we waiting for? J Clin Monit Comput 2018; 32:593-594. [PMID: 29907948 DOI: 10.1007/s10877-018-0172-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 06/14/2018] [Indexed: 01/02/2023]
Affiliation(s)
- Jan Hendrickx
- Department of Anesthesiology, Intensive Care and Pain Therapy, OLV Hospital, Aalst, Belgium.
| | - Jan Poelaert
- Chair Dept Anesthesiology and Perioperative Medicine, Acute and Chronic Pain Therapy, UZ Brussel, Jette, Belgium
| | - Andre De Wolf
- Department of Anesthesiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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