Mechanical Ventilation in Status Asthmaticus Part 1 with Dr. Mekela Whyte-Nesfield
Feb 6, 2023
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Dr. Mekela Whyte-Nesfield, a Critical Care attending at Children's National Hospital, discusses indications for intubation in asthma patients, acid-base abnormalities, sedation and paralysis considerations, medications and techniques for treatment, and the challenges of manual chest compression in asthmatic patients.
Proper ventilation settings, including inspiratory time, rate, and pressures, play a crucial role in managing asthmatic patients on mechanical ventilation.
Effective communication and coordination among healthcare professionals are essential for optimal management of asthmatic patients on mechanical ventilation.
Deep dives
The podcast episode focuses on the management of asthma patients requiring invasive mechanical ventilation.
The episode explores the challenges and considerations when intubating and ventilating asthmatic patients. It highlights the criteria for intubation, such as neuro status, worker breathing, and silent chest. The importance of understanding the physiologic aspects of ventilation and the potential complications of air leak syndrome are emphasized. Additionally, the episode discusses the use of sedation, paralysis, and various medications, including ketamine, aminophylline, and terbutaline. The choice between pressure control and volume control modes of ventilation is also discussed, along with the importance of monitoring plateau pressures and setting appropriate alarm thresholds to prevent barotrauma.
Manual decompression as a technique to support ventilation in asthmatic patients is discussed.
The episode highlights the use of manual decompression as a supportive measure for improving ventilation in asthmatic patients. The hosts and the guest speaker share their experiences and practical tips for performing manual decompression during suctioning or while the patient is on bipap. They discuss proper technique, including applying downward pressure to the chest during exhalation to remove trapped air and improve breath delivery. The benefits of manual decompression in facilitating air movement and buying time until other interventions are implemented are emphasized. The episode also mentions a case series highlighting the positive outcomes associated with manual decompression in hypercarbic asthmatic patients.
Ventilation strategies and considerations for managing asthma patients on the ventilator are discussed.
The episode delves into the various ventilation strategies employed for asthmatic patients on the ventilator. It highlights the importance of setting appropriate settings for pressure control, pressure support, and volume control modes. The hosts and guest speaker emphasize the need to balance the maintenance of adequate minute ventilation with the prevention of barotrauma. The discussion covers the adjustment of inspiratory time, rate, and set pressures based on the patient's individual condition. The role of plateau pressures in assessing lung injury and managing airway obstruction is also emphasized. The episode underscores the importance of monitoring and adjusting ventilation settings according to patient response and ventilator alarms.
The episode provides insights into the multidisciplinary approach to ventilating asthma patients.
The episode emphasizes the collaborative approach required for optimal management of asthma patients on mechanical ventilation. It highlights the importance of effective communication and coordination between healthcare professionals, including physicians, respiratory therapists, and nurses. The discussion acknowledges the need for prompt administration of appropriate medications, such as bronchodilators and corticosteroids. The consideration of sedation and paralysis, as well as the evaluation of oxygenation, blood gases, and potential complications like diffusion issues, are discussed. The episode emphasizes the utilization of individualized strategies and continuous monitoring to ensure the best possible outcomes for these high-risk patients.
Dr. Whyte-Nesfield is a Critical Care attending at Children’s National Hospital in Washington, DC. She completed her medical degree in her home country of Grenada at St. George’s University, and her fellowship in Pediatric Critical Care at Penn State Health Children’s Hospital, PA. Mekela’s research interest is the role of parent and child traumatic stress management in improving long term outcomes of children in the PICU; she ran a multi-center prevalence study during her fellowship. She is also interested in advanced ventilator modes and educating the next generation of intensivists about pulmonary physiology.
Objectives: After listening to this episode, listeners should be able to:
Define indications for intubation in a patient with asthma.
Review adjunct therapies, including high-dose steroids, mag, epi, terbutaline, isoproterenol, aminophylline, isoflurane, and manual decompression of the chest.
Identify the physiologic and logistic rationale supporting each mode of mechanical ventilation in asthma (PRVC vs PCPS).
Identify the benefits and risks of paralyzing an intubated asthmatic.
Discuss the relationshiop between static compliance, dynamic compliance, and reversible bronchoconstriction.
Describe the complications of mechanical ventilation in asthma, including indications for ECMO.
References:
Manual external chest compression reverses respiratory failure in children with severe air trapping. Pediatric Pulmonology, 56(12), 3887–3890. https://doi.org/10.1002/ppul.25689
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Thank you for listening to this episode of PedsCrit. Please remember that all content during this episode is intended for educational and entertainment purposes only. It should not be used as medical advice. The views expressed during this episode by hosts and our guests are their own and do not reflect the official position of their institutions. If you have any comments, suggestions, or feedback-you can email us at pedscritpodcast@gmail.com. Check out http://www.pedscrit.comfor detailed show notes. And visit @critpeds on twitter and @pedscrit on instagram for real time show updates.
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