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Cheng J, Ma A, Dong M, Zhou Y, Wang B, Xue Y, Wang P, Yang J, Kang Y. Does airway pressure release ventilation offer new hope for treating acute respiratory distress syndrome? JOURNAL OF INTENSIVE MEDICINE 2022; 2:241-248. [PMID: 36785647 PMCID: PMC8958099 DOI: 10.1016/j.jointm.2022.02.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/30/2022] [Accepted: 02/16/2022] [Indexed: 01/01/2023]
Abstract
Mechanical ventilation (MV) is an essential life support method for patients with acute respiratory distress syndrome (ARDS), which is one of the most common critical illnesses with high mortality in the intensive care unit (ICU). A lung-protective ventilation strategy based on low tidal volume (LTV) has been recommended since a few years; however, as this did not result in a significant decrease of ARDS-related mortality, a more optimal ventilation mode was required. Airway pressure release ventilation (APRV) is an old method defined as a continuous positive airway pressure (CPAP) with a brief intermittent release phase based on the open lung concept; it also perfectly fits the ARDS treatment principle. Despite this, APRV has not been widely used in the past, rather only as a rescue measure for ARDS patients who are difficult to oxygenate. Over recent years, with an increased understanding of the pathophysiology of ARDS, APRV has been reproposed to improve patient prognosis. Nevertheless, this mode is still not routinely used in ARDS patients given its vague definition and complexity. Consequently, in this paper, we summarize the studies that used APRV in ARDS, including adults, children, and animals, to illustrate the settings of parameters, effectiveness in the population, safety (especially in children), incidence, and mechanism of ventilator-induced lung injury (VILI) and effects on extrapulmonary organs. Finally, we found that APRV is likely associated with improvement in ARDS outcomes, and does not increase injury to the lungs and other organs, thereby indicating that personalized APRV settings may be the new hope for ARDS treatment.
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Affiliation(s)
| | | | | | | | | | | | | | - Jing Yang
- Corresponding authors: Yan Kang and Jing Yang, Department of Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, China.
| | - Yan Kang
- Corresponding authors: Yan Kang and Jing Yang, Department of Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, China.
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Garg R. Lung Protective Ventilation in Brain-Injured Patients: Low Tidal Volumes or Airway Pressure Release Ventilation? JOURNAL OF NEUROANAESTHESIOLOGY AND CRITICAL CARE 2020. [DOI: 10.1055/s-0040-1716800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
AbstractThe optimal mode of mechanical ventilation for lung protection is unknown in brain-injured patients as this population is excluded from large studies of lung protective mechanical ventilation. Survey results suggest that low tidal volume (LTV) ventilation is the favored mode likely due to the success of LTV in other patient populations. Airway pressure release ventilation (APRV) is an alternative mode of mechanical ventilation that may offer several benefits over LTV in this patient population. APRV is an inverse-ratio, pressure-controlled mode of mechanical ventilation that utilizes a higher mean airway pressure compared with LTV. This narrative review compares both modes of mechanical ventilation and their consequences in brain-injured patients. Fears that APRV may raise intracranial pressure by virtue of a higher mean airway pressure are not substantiated by the available evidence. Primarily by virtue of spontaneous breathing, APRV often results in improvement in systemic hemodynamics and thereby improvement in cerebral perfusion pressure. Compared with LTV, sedation requirements are lessened by APRV allowing for more accurate neuromonitoring. APRV also uses an open loop system supporting clearance of secretions throughout the respiratory cycle. Additionally, APRV avoids hypercapnic acidosis and oxygen toxicity that may be especially deleterious to the injured brain. Although high-level evidence is lacking that one mode of mechanical ventilation is superior to another in brain-injured patients, several aspects of APRV make it an appealing mode for select brain-injured patients.
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Affiliation(s)
- Ravi Garg
- Division of Neurocritical Care, Department of Neurology, Loyola University Medical Center, Maywood, Illinois, United States
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Towner JE, Rahmani R, Zammit CG, Khan IR, Paul DA, Bhalla T, Roberts DE. Mechanical ventilation in aneurysmal subarachnoid hemorrhage: systematic review and recommendations. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2020; 24:575. [PMID: 32972406 PMCID: PMC7512211 DOI: 10.1186/s13054-020-03269-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 09/02/2020] [Indexed: 02/04/2023]
Abstract
Objective Mechanical ventilation (MV) has a complex interplay with the pathophysiology of aneurysmal subarachnoid hemorrhage (aSAH). We aim to provide a review of the physiology of MV in patients with aSAH, give recommendations based on a systematic review of the literature, and highlight areas that still need investigation. Data sources PubMed was queried for publications with the Medical Subject Headings (MeSH) terms “mechanical ventilation” and “aneurysmal subarachnoid hemorrhage” published between January 1, 1990, and March 1, 2020. Bibliographies of returned articles were reviewed for additional publications of interest. Study selection Study inclusion criteria included English language manuscripts with the study population being aSAH patients and the exposure being MV. Eligible studies included randomized controlled trials, observational trials, retrospective trials, case-control studies, case reports, or physiologic studies. Topics and articles excluded included review articles, pediatric populations, non-aneurysmal etiologies of subarachnoid hemorrhage, mycotic and traumatic subarachnoid hemorrhage, and articles regarding tracheostomies. Data extraction Articles were reviewed by one team member, and interpretation was verified by a second team member. Data synthesis Thirty-one articles met the inclusion criteria for this review. Conclusions We make recommendations on oxygenation, hypercapnia, PEEP, APRV, ARDS, and intracranial pressure monitoring.
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Affiliation(s)
- James E Towner
- Department of Neurosurgery, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA
| | - Redi Rahmani
- Department of Neurosurgery, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA.
| | - Christopher G Zammit
- Department of Neurosurgery, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA.,Division of Neurocritical Care, Department of Neurology, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA.,Division of Pulmonary Diseases and Critical Care, Department of Medicine, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA.,TriHealth Critical Care, 10506 Montgomery Road, Suite 301, Cincinnatir, OH, 45242, USA
| | - Imad R Khan
- Department of Neurosurgery, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA.,Division of Neurocritical Care, Department of Neurology, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA.,Division of Pulmonary Diseases and Critical Care, Department of Medicine, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA
| | - David A Paul
- Department of Neurosurgery, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA
| | - Tarun Bhalla
- Department of Neurosurgery, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA.,Department of Imaging Sciences, University of Rochester Medical Center, 601 Elmwood Ave, Box 670, Rochester, NY, 14642, USA.,Department of Neurology, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA
| | - Debra E Roberts
- Department of Neurosurgery, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA.,Division of Neurocritical Care, Department of Neurology, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA.,Division of Pulmonary Diseases and Critical Care, Department of Medicine, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA.,Department of Anesthesiology and Perioperative Medicine, University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY, 14642, USA
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Pulmonary Consult: Management of Severe Hypoxia in the Neurocritical Care Unit. Neurocrit Care 2019. [DOI: 10.1017/9781107587908.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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5
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Hypoxic Encephalopathy in the Neurocritical Care Unit. Neurocrit Care 2019. [DOI: 10.1017/9781107587908.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ventilatory Strategies in the Brain-injured Patient. Int Anesthesiol Clin 2019; 56:131-146. [PMID: 29227316 DOI: 10.1097/aia.0000000000000169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Edgerton CA, Leon SM, Hite MA, Kalhorn SP, Scott LA, Eriksson EA. Airway pressure release ventilation does not increase intracranial pressure in patients with traumatic brain injury with poor lung compliance. J Crit Care 2018; 50:118-121. [PMID: 30530262 DOI: 10.1016/j.jcrc.2018.11.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 10/05/2018] [Accepted: 11/30/2018] [Indexed: 10/27/2022]
Abstract
The use of Airway Pressure Release Ventilation (APRV) in patients with traumatic brain injury (TBI) remains controversial. Some believe that elevated mean airway pressures transmitted to the thorax may cause clinically significant increases in Central Venous Pressure (CVP) and intracranial pressure (ICP) from venous congestion. We perform a retrospective review from 2009 to 2015 of traumatically injured patients who were transitioned from traditional ventilator modes to APRV and also had an ICP monitor in place. Fifteen patients undergoing 19 transitions to APRV were identified. Prior to transitioning to APRV the average static and dynamic compliance was 22.9 +/- 5.6 and 16.5 +/- 4.12 mL/cm H2O. There was no statistical difference in ICP, MAP, and CPP prior to and after transition to APRV. There was a statistically significant increase in CVP, PaO2, and P:F ratio. Individually, only 4 patients had ICP values >20 in the first hour after transitioning to APRV and the rate of ICP elevations was similar between the two modes of ventilation. These data show that APRV is a viable mode of ventilation in patients with TBI who have low lung compliance. The increased CVP of this mode of ventilation did not affect ICP or hemodynamic parameters.
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Affiliation(s)
- Colston A Edgerton
- Department of Surgery, Division of Trauma and Critical Care, 96 Jonathan Lucas St. CSB 416, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Stuart M Leon
- Department of Surgery, Division of Trauma and Critical Care, 96 Jonathan Lucas St. CSB 416, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Melissa A Hite
- Department of Surgery, Division of Trauma and Critical Care, 96 Jonathan Lucas St. CSB 416, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Stephen P Kalhorn
- Department of Neurosurgery, 96 Jonathan Lucas St. Room 301 CSB, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Lancer A Scott
- Department of Emergency Medicine, 169 Ashley Ave. Room 265 NT, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Evert A Eriksson
- Department of Surgery, Division of Trauma and Critical Care, 96 Jonathan Lucas St. CSB 416, Medical University of South Carolina, Charleston, SC 29425, USA.
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Abstract
Airway management and ventilation are central to the resuscitation of the neurologically ill. These patients often have evolving processes that threaten the airway and adequate ventilation. Furthermore, intubation, ventilation, and sedative choices directly affect brain perfusion. Therefore, Airway, Ventilation, and Sedation was chosen as an Emergency Neurological Life Support protocol. Topics include airway management, when and how to intubate with special attention to hemodynamics and preservation of cerebral blood flow, mechanical ventilation settings and the use of sedative agents based on the patient's neurological status.
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Fletcher JJ, Wilson TJ, Rajajee V, Davidson SB, Walsh JC. Changes in Therapeutic Intensity Level Following Airway Pressure Release Ventilation in Severe Traumatic Brain Injury. J Intensive Care Med 2016; 33:196-202. [PMID: 27651443 DOI: 10.1177/0885066616669315] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PURPOSE Airway pressure release ventilation (APRV) utilizes high levels of airway pressure coupled with brief expiratory release to facilitate open lung ventilation. The aim of our study was to evaluate the effects of APRV-induced elevated airway pressure mean in patients with severe traumatic brain injury. MATERIALS AND METHODS This was a retrospective cohort study at a 424-bed Level I trauma center. Linear mixed effects models were developed to assess the difference in therapeutic intensity level (TIL), intracranial pressure (ICP), and cerebral perfusion pressure (CPP) over time following the application of APRV. RESULTS The study included 21 epochs of APRV in 21 patients. In the 6-hour epoch following the application of APRV, the TIL was significantly increased ( P = .002) and the ICP significantly decreased ( P = .041) compared to that before 6 hours. There was no significant change in CPP ( P = .42) over time. The baseline static compliance and time interaction was not significant for TIL (χ2 = 0.2 [ df 1], P = .655), CPP (χ2 = 0 [ df 1], P = 1), or ICP (χ2 = 0.1 [ df 1], P = .752). CONCLUSIONS Application of APRV in patients with severe traumatic brain injury was associated with significantly, but not clinically meaningful, increased TIL and decreased ICP. No significant change in CPP was observed. No difference was observed based on the baseline pulmonary static compliance.
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Affiliation(s)
- Jeffrey J Fletcher
- 1 Department of Neurosurgery, University of Michigan, Ann Arbor, MI, USA.,2 Bronson Neuroscience Center, Bronson Methodist Hospital, Kalamazoo, MI, USA
| | - Thomas J Wilson
- 1 Department of Neurosurgery, University of Michigan, Ann Arbor, MI, USA
| | - Venkatakrishna Rajajee
- 1 Department of Neurosurgery, University of Michigan, Ann Arbor, MI, USA.,3 Department of Neurology, University of Michigan, Ann Arbor, MI, USA
| | - Scott B Davidson
- 4 Trauma, Burn, and Surgical Critical Care Program, Bronson Methodist Hospital, Kalamazoo, MI, USA
| | - Jon C Walsh
- 4 Trauma, Burn, and Surgical Critical Care Program, Bronson Methodist Hospital, Kalamazoo, MI, USA
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Abstract
Airway management and ventilation are central to the resuscitation of the neurologically ill. These patients often have evolving processes that threaten the airway and adequate ventilation. Furthermore, intubation, ventilation, and sedative choices directly affect brain perfusion. Therefore, airway, ventilation, and sedation was chosen as an emergency neurological life support protocol. Topics include airway management, when and how to intubate with special attention to hemodynamics and preservation of cerebral blood flow, mechanical ventilation settings, and the use of sedative agents based on the patient's neurological status.
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Abstract
Patients with refractory intracranial hypertension often require short-term mechanical ventilation because they cannot protect their airway. Airway pressure release ventilation (APRV) is less commonly used than other modes because it is thought to increase intracranial pressure. However, this case study describes how APRV improved alveolar recruitment and functional residual capacity in a patient with refractory intracranial hypertension secondary to severe traumatic brain injury.
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Kapinos G, Chichra A. Lung-protective ventilation for SAH patients: are these measures truly protective? Neurocrit Care 2015; 21:175-7. [PMID: 25208682 DOI: 10.1007/s12028-014-0058-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gregory Kapinos
- Departments of Neurosurgery & Neurology, Hofstra North Shore-LIJ School of Medicine, North Shore-LIJ Health System, 300 Community Drive, Tower, 9th floor, Manhasset, NY, 11030, USA,
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Abstract
PURPOSE OF REVIEW Intracranial pressure (ICP) control is a mainstay of traumatic brain injury (TBI) management. However, development of intracranial hypertension (ICH) may be affected by factors outside of the cranial vault in addition to the local effects of the TBI. This review will examine the pathophysiology of multiple compartment syndrome (MCS) and current treatment considerations for patients with TBI given the effects of MCS. RECENT FINDINGS Elevated intra-abdominal pressure (IAP) is associated with ICP elevation, and decompressive laparotomy in patients with concurrent elevations in IAP and ICP can reduce ICP. Elevated intrathoracic pressure may be similarly associated with ICP elevation, although the ideal ventilator management strategy for TBI patients when considering MCS is unclear. SUMMARY In MCS, intracranial, intrathoracic and intra-abdominal compartment pressures are interrelated. TBI patient care should include ICP control as well as minimization of intrathoracic and intra-abdominal pressure as clinically possible.
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Marshall SA, Kalanuria A, Markandaya M, Nyquist PA. Management of intracerebral pressure in the neurosciences critical care unit. Neurosurg Clin N Am 2013; 24:361-73. [PMID: 23809031 DOI: 10.1016/j.nec.2013.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Management of intracranial pressure in neurocritical care remains a potentially valuable target for improvements in therapy and patient outcomes. Surrogate markers of increased intracranial pressure, invasive monitors, and standard therapy, as well as promising new approaches to improve cerebral compliance are discussed, and a current review of the literature addressing this metric in neuroscience critical care is provided.
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Affiliation(s)
- Scott A Marshall
- Neurology and Critical Care, Department of Medicine, San Antonio Military Medical Center, 3551 Roger Brooke Drive, Fort Sam Houston, Texas, TX 78234, USA.
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