79. RFJC 10 – ARDS Series – FACTT

Posted on August 2, 2024 by Pulm PEEPs

In this podcast episode, we continue our summer series reviewing landmark ARDS studies. Today, Dave and Luke discuss the FACTT trial, which investigated fluid management strategies in ARDS. This was published in the NEJM in 2006.

Article and Reference

We’re talking about the FACTT trial today which was a “Comparison of Two Fluid-Management Strategies in Acute Lung Injury”

Reference: National Heart, Lung, and Blood Institute Acute Respiratory Distress Syndrome (ARDS) Clinical Trials Network; Wiedemann HP, Wheeler AP, Bernard GR, Thompson BT, Hayden D, deBoisblanc B, Connors AF Jr, Hite RD, Harabin AL. Comparison of two fluid-management strategies in acute lung injury. N Engl J Med. 2006 Jun 15;354(24):2564-75. doi: 10.1056/NEJMoa062200. Epub 2006 May 21. PMID: 16714767.

Infographic

Summary of discussion:

Background: The FACT trial aimed to address fluid balance in ARDS, given the complexity of managing pulmonary edema and systemic organ failure. The challenge has been finding the right balance between managing fluid to optimize cardiac function and avoiding exacerbation of pulmonary edema.

Study Design:

Randomized Controlled Trial: Conducted at 20 North American medical centers from 2000 to 2005.
Participants: Included intubated ARDS patients who required or were planned to receive a central venous catheter. Excluded patients with chronic diseases, recent MI, or irreversible conditions. Shock was not an exclusion criterion.
Interventions: Patients were randomly assigned to either a liberal or conservative fluid management strategy, and also received either a PA catheter or a central line.

Fluid Management Protocol:

Liberal Strategy: Aimed for higher filling pressures (CVP of 10-14 or wedge pressure of 14-18).
Conservative Strategy: Aimed for lower filling pressures (CVP less than 4 or wedge pressure under 14).

Fluid Balance: The liberal group had a net positive fluid balance of around 7 liters, while the conservative group had a net negative balance of about 130 cc.

Results:

Mortality: No statistically significant difference in 60-day mortality between the liberal and conservative groups (25.5% vs. 28.4%, respectively).
Ventilator and ICU-Free Days: The conservative strategy resulted in more ventilator-free and ICU-free days.
Shock and Dialysis: There was no difference in shock rates, but the conservative group had a trend toward fewer dialysis requirements (10% vs. 14%, p=0.06).

Conclusion: The trial indicated that a conservative fluid management strategy in ARDS patients can reduce ventilator dependence and ICU length of stay without worsening shock or end-organ function. It underscores the benefit of managing fluid conservatively to protect lung function, even though it didn’t significantly reduce mortality.

Overall, the FACT trial supports the practice of conservative fluid management in ARDS, advocating that “dry lungs are happy lungs” for improving patient outcomes.

Podcast: Play in new window | Download

78. PREOXI Trial

Posted on July 30, 2024 by Pulm PEEPs

Today, we’re going to be talking about pre-oxygenation methods for endotracheal intubation and the PREOXI Trial which is hot off the presses in the New England Journal of Medicine in June of 2024. This trial has potentially widespread, practice changing results and we’re lucky enough to be joined by two of the authors to discuss.

Meet Our Guests

Dr. Kevin Gibbs is an Associate Professor of Medicine at Wake Forest University School of Medicine. He obtained his MD at George Washington University School of Medicine, and completed his residency and fellowship training at Johns Hopkins. He is an active researcher in critical care, ARDS, mechanical ventilation, and pragmatic trial design.

Dr. Jon Casey is an Assistant Professor of Medicine for the Division of Allergy, Pulmonary, and Critical Care Medicine at Vanderbilt University Medical Center. He obtained his MD from the University of Louisville School of Medicine, and completed his residency training at Brigham and Women’s Hospital before going to Vanderbilt for fellowship training. He is a physician scientist and also has his Masters of Science in Clinical Investigation. His research is focused on comparative effectiveness of ICU treatments and he also has a focus on pragmatic trials. He is supported with NIH funding and is active in the American Thoracic Society Critical Care Assembly.

Summarized Key Points

Significance of the Problem: Tracheal intubation in emergency and ICU settings is common, with significant risks such as hypoxemia (10-20% incidence) and cardiac arrest (2% incidence) associated with the procedure. This makes effective pre-oxygenation crucial.

Methods of Pre-oxygenation: Common methods include face mask oxygen (e.g., non-rebreather, bag-mask devices) and more advanced techniques like non-invasive ventilation (used in about 15% of cases globally). Each method has pros (e.g., simplicity, no risk of aspiration for face masks; 100% oxygen delivery, positive pressure for non-invasive ventilation) and cons (e.g., potential for gastric insufflation with non-invasive ventilation).

Study Design: The study discussed in the podcast is a pragmatic trial aiming to optimize pre-oxygenation strategies to prevent peri-intubation hypoxemia. Eligibility criteria were broad, encompassing most patients undergoing tracheal intubation in the ED or ICU, with exclusions mainly for safety reasons.

Primary Outcome: The primary outcome of the trial was hypoxemia, defined as oxygen saturation < 85%. This threshold was chosen because it signifies a critical point on the oxygen dissociation curve, where patients are at higher risk of further desaturation and adverse outcomes.

Secondary Outcomes: Secondary exploratory outcomes included more severe levels of hypoxemia (oxygen saturation < 80% and < 70%), aiming to capture varying degrees of oxygenation failure during intubation. Rates of cardiac arrest during intubation were an additional outcome.

Intervention Comparison:
- The trial compared two methods of pre-oxygenation: non-invasive ventilation (NIV) and oxygen mask (face mask)
- Both methods aimed to provide at least three minutes of pre-oxygenation before intubation.
- NIV group specifics: Expiratory pressure of 5 cm H2O, Inspiratory pressure of 10 cm H2O, respiratory rate of 10 breaths per minute, and 100% oxygen delivery
- Oxygen mask group specifics: Non-rebreather or bag mask device with at least 15 liters per minute oxygen flow.
- Nasal cannulas and HFNC could be used in both groups.

Logistics and Equipment Use:
- The trial allowed flexibility in using available equipment (invasive ventilator capable of NIPPV vs. dedicated BiPAP machine).
- Sites were encouraged to use the same ventilator for both pre-oxygenation and subsequent ventilation to streamline workflow and reduce logistical challenges.

Primary and Secondary Outcomes:
- Results showed a significant reduction in hypoxemia incidents in the NIV group compared to the oxygen mask group.
- There was also a reduction in severe hypoxemia and a notable decrease in cardiac arrest incidents in the NIV group.

Aspiration Safety:
- There was no statistical difference in aspiration-related outcomes between the NIV and oxygen mask groups, indicating that NIV did not increase the risk of aspiration.

Conclusions:
- The trial concluded that NIV for pre-oxygenation significantly reduced the incidence of hypoxemia and possibly cardiac arrest during tracheal intubation.
- It also dispelled concerns about increased aspiration risk with NIPPV as pre-oxygenation, suggesting it can be safely used in clinical practice.

Reference

Gibbs KW, Semler MW, Driver BE, Seitz KP, Stempek SB, Taylor C, Resnick-Ault D, White HD, Gandotra S, Doerschug KC, Mohamed A, Prekker ME, Khan A, Gaillard JP, Andrea L, Aggarwal NR, Brainard JC, Barnett LH, Halliday SJ, Blinder V, Dagan A, Whitson MR, Schauer SG, Walker JE Jr, Barker AB, Palakshappa JA, Muhs A, Wozniak JM, Kramer PJ, Withers C, Ghamande SA, Russell DW, Schwartz A, Moskowitz A, Hansen SJ, Allada G, Goranson JK, Fein DG, Sottile PD, Kelly N, Alwood SM, Long MT, Malhotra R, Shapiro NI, Page DB, Long BJ, Thomas CB, Trent SA, Janz DR, Rice TW, Self WH, Bebarta VS, Lloyd BD, Rhoads J, Womack K, Imhoff B, Ginde AA, Casey JD; PREOXI Investigators and the Pragmatic Critical Care Research Group. Noninvasive Ventilation for Preoxygenation during Emergency Intubation. N Engl J Med. 2024 Jun 20;390(23):2165-2177. doi: 10.1056/NEJMoa2313680. Epub 2024 Jun 13. PMID: 38869091.

Podcast: Play in new window | Download

77. RFJC 9 – ARDS Series – ARMA

Posted on July 23, 2024 by Pulm PEEPs

This episode is launching our 2024 Rapid Fire Journal Club summer series on ARDS! This summer we will be talking about landmark ARDS trials that have defined the literature and shaped patient care. Journal clubs often focus on new trials, and so learners may have a less thorough understanding of the baseline literature that defines many of our ICU practices. The goal of this series is to provide a quick, but in-depth look at these papers so that learners understand the modern landscape of ARDS.

Today, we’re kicking this initiative off by looking at the ARMA or ARDSNet Trial published in the NEJM in 2000. Enjoy!

Article and Reference

We’re talking about the ARMA trial today which examined “Ventilation with Lower Tidal Volumes as Compared with Traditional Tidal Volumes for Acute Lung Injury and the Acute Respiratory Distress Syndrome.”

Reference: Acute Respiratory Distress Syndrome Network; Brower RG, Matthay MA, Morris A, Schoenfeld D, Thompson BT, Wheeler A. Ventilation with lower tidal volumes as compared with traditional tidal volumes for acute lung injury and the acute respiratory distress syndrome. N Engl J Med. 2000 May 4;342(18):1301-8. doi: 10.1056/NEJM200005043421801. PMID: 10793162.

Infographic

Correction:

We mention a step-wise titration of tidal volume in the control group to achieve Pplats of 45-50. To clarify, there was no adjustment of Vt in the traditional Vt group unless Pplat > 50. If Vt had been decreased in the traditional Vt group because Pplat was > 50, it would not be subsequently increased back to 12 unless Pplat < 45 (to avoid a cycle of corrections and re-adjustments). Similarly in the lower Vt group, there was no adjustment (“titration”) of Vt unless Pplat > 30, and there was a similar protocol in place not to increase the Vt again unless the Pplat was < 25.

Podcast: Play in new window | Download

76. Fellows’ Case Files: University of Rochester

Posted on July 18, 2024 by Pulm PEEPs

Today we’re back with another stop on our Fellows’ Case Files journey and making our way to the University of Rochester. Tune in to hear about this fascinating case and learn some key teaching points along the way.

Meet Our Guests

Dr. Shiv Patel completed his IM residency and a Chief year at the California Pacific Medical Center- Van Ness Campus and is currently a second-year PCCM fellow at the University of Rochester.

Dr. Mary Anne Morgan is an Associate Professor of Medicine and the Fellowship Program Director for the PCCM Fellowship at the University of Rochester. Her clinical interests range from the care of critically ill patients in the ICU to the diagnosis and management of rare lung disease in her role as Director of the University of Rochester LAM Clinic. She loves unwrapping clinical reasoning with trainees, exploring issues around communication and teamwork in the ICU, and is excited about curriculum revitalization in the growing URMC PCCM fellowship program.

Case Presentation

A 75 y.o. female with a history of Hypertension, Hyperlipidemia, and Type 2 Diabetes presented for evaluation of hypoglycemia and generalized fatigue. She had felt poorly for about a week with symptoms of back pain, generalized weakness, and dyspnea, all of which acutely worsened on the day of presentation.

She was found to be hypoglycemic with a blood glucose level in the to 40’s. Initial vital signs included a heart rate of 56, blood pressure of 70/40, respiratory rate of 30, and temperature of 28.5 degrees Celsius.

Key Learning Points

Lactic Acidosis: Type A, Type B and Type D

Type A: Typically secondary to conditions that impair oxygen delivery (respiratory failure, PE) to tissues or decrease tissue perfusion (severe anemia, shock). Patients typically present with hypotension, tachycardia, tachypnea, altered mental status, and signs of organ dysfunction.

Type B: Typically secondary to conditions that directly affect cellular metabolism or lactate clearance and characterized by the presence of hyperlactatemia without evidence of tissue hypoperfusion or hypoxia. Conditions associated include liver dysfunction (e.g., liver failure, cirrhosis), malignancies (especially hematological malignancies), medications/toxins (e.g., metformin, cyanide poisoning), inborn errors of metabolism, and mitochondrial disorders.

Type D: Less common presentation and can be seen in patients with short gut syndrome.

References

1.Blough B, Moreland A, Mora A Jr. Metformin-induced lactic acidosis with emphasis on the anion gap. Proc (Bayl Univ Med Cent). 2015 Jan;28(1):31-3. doi: 10.1080/08998280.2015.11929178. PMID: 25552792; PMCID: PMC4264704.

2.Callelo et al. Extracorporeal Treatment for Metformin Poisoning: Systematic Review and Recommendations From the Extracorporeal Treatments in Poisoning Workgroup. DOI: 10.1097/CCM.0000000000001002

3.Friesecke, S., Abel, P., Roser, M. et al. Outcome of severe lactic acidosis associated with metformin accumulation. Crit Care 14, R226 (2010). https://doi.org/10.1186/cc9376

4.Madias NE. Lactic acidosis. Kidney Int. 1986 Mar;29(3):752-74. doi: 10.1038/ki.1986.62. PMID: 3702227.

5. Stiller RH, Luks AM, Çoruh B. All That Raises Lactate Is Not Sepsis. ATS Sch. 2023 Jun 12;4(3):385-386. doi: 10.34197/ats-scholar.2023-0032OT.

Podcast: Play in new window | Download

Radiology Rounds – 7/9/24

Posted on July 9, 2024 by Pulm PEEPs

Time for another Radiology Rounds! This case is brought to you by our Associate Editor Nick Ghionni @pulmtoilet ! A 55 year old man presents to the hospital with progressive dyspnea and a chronic cough. Here is his initial CXR.

Further history and exam is taken and is notable for

Progressive dyspnea, especially with exertion

Has received courses of steroids and antibiotics in the past

Breeds pigeons

Tachypneic on exam, scattered rales, and rare faint wheeze

A high resolution, thin cut, CT w/out contrast inspiratory and expiratory, and prone and supine is performed. Here are some key images Remember to apply Pulm PEEPs’ LAMBS approach to reading CTs with diffuse parenchymal findings

The CT scan shows an example of Triple Density Sign (formerly Headcheese Sign). This finding of areas of normal lung, high attenuation GGOs, and lucent regions of air trapping scattered throughout the lung is a specific, but not sensitive sign for fibrotic HP

75. Rapid Fire Journal Club 8 – STELLAR

Posted on July 2, 2024 by Pulm PEEPs

We’re back with our Rapid Fire Journal Club, and talking about the NEJM 2023 STELLAR Trial of Sotatercept in Pulmonary Arterial Hypertension. This is a landmark trial that is actively changing the face of PAH treatment today. Listen to hear the details of the trial and how its findings can be utilized to help patients.

Article and Reference

We’re looking at the STELLAR Trial today which is a Phase 3 trial of Sotatercept in Pulmonary Arterial Hypertension.

Reference: Hoeper MM, Badesch DB, Ghofrani HA, Gibbs JSR, Gomberg-Maitland M, McLaughlin VV, Preston IR, Souza R, Waxman AB, Grünig E, Kopeć G, Meyer G, Olsson KM, Rosenkranz S, Xu Y, Miller B, Fowler M, Butler J, Koglin J, de Oliveira Pena J, Humbert M; STELLAR Trial Investigators. Phase 3 Trial of Sotatercept for Treatment of Pulmonary Arterial Hypertension. N Engl J Med. 2023 Apr 20;388(16):1478-1490. doi: 10.1056/NEJMoa2213558. Epub 2023 Mar 6. PMID: 36877098.

Infographic

Podcast: Play in new window | Download

74. Global Definition of ARDS

Posted on June 24, 2024 by Pulm PEEPs

We have had a number of episodes on Acute Respiratory Distress Syndrome or ARDS. These episodes have ranged from how to titrate PEEP, subphenotypes in ARDS, and the future of ARDS research. Today, we are talking about how we all think about and define ARDS, and work that has highlighted a newer global definition of ARDS.

Meet our Guests

Dr. Elisabeth Riviello is an Assistant Professor of Medicine at Harvard Medical School, and a PCCM physician at Beth Israeal Deconess Medical Center. She is also an Affiliate of the HMS Department of Global Health and Social Medicine and an honorary Associate Professor of Emergency Medicine and Critical Care at the University of Rwanda. She is passionate about improving critical care delivery in resource limited settings and has served on Committees for the World Health Organization. She is the Principal Investigator of BREATHE or the (Building Respiratory Support in East Africa Through High flow versus standard flow oxygen Evaluation); a RCT looking at HFNC in five sites in Kenya, Malawi, and Rwanda.

Dr. Theogen Twagirumugabe is an Anesthesiologist and Intensivist at the College of Medicine and Health Sciences, and a Professor at the University of Rwanda. In addition to clinical work, he has his PhD in Medical Sciences. He is a widely succesful researcher with over 70 publications in critical care and anesthesia delivery and is also a lead investigator in the BREATHE initiative.

References

Matthay MA, Arabi Y, Arroliga AC, Bernard G, Bersten AD, Brochard LJ, Calfee CS, Combes A, Daniel BM, Ferguson ND, Gong MN, Gotts JE, Herridge MS, Laffey JG, Liu KD, Machado FR, Martin TR, McAuley DF, Mercat A, Moss M, Mularski RA, Pesenti A, Qiu H, Ramakrishnan N, Ranieri VM, Riviello ED, Rubin E, Slutsky AS, Thompson BT, Twagirumugabe T, Ware LB, Wick KD. A New Global Definition of Acute Respiratory Distress Syndrome. Am J Respir Crit Care Med. 2024 Jan 1;209(1):37-47. doi: 10.1164/rccm.202303-0558WS. PMID: 37487152; PMCID: PMC10870872.

Riviello ED, Buregeya E, Twagirumugabe T. Diagnosing acute respiratory distress syndrome in resource limited settings: the Kigali modification of the Berlin definition. Curr Opin Crit Care. 2017 Feb;23(1):18-23. doi: 10.1097/MCC.0000000000000372. PMID: 27875408.

ARDS Definition Task Force; Ranieri VM, Rubenfeld GD, Thompson BT, Ferguson ND, Caldwell E, Fan E, Camporota L, Slutsky AS. Acute respiratory distress syndrome: the Berlin Definition. JAMA. 2012 Jun 20;307(23):2526-33. doi: 10.1001/jama.2012.5669. PMID: 22797452.

Podcast: Play in new window | Download

73. PulmPEEPs and ATS Critical Care Assembly: Dying in the ICU

Posted on May 20, 2024 by Pulm PEEPs

Welcome to our second episode of ATS 2024 highlighting content featured through the ATS Critical Care Assembly. Today we are going to be talking about one of the Critical Care Assembly Symposiums entitled: “Care of Dying in the ICU: End of Life Care in 2024 and Beyond”

Meet our Guests

Dr. Theodore “Jack: Iwashyna is a Bloomberg Distinguished Professor at Johns Hopkins School of Medicine and the Johns Hopkins Bloomberg School of Public Health. Jack is a critical care physician and has a broad focus on research that understands the broader context of critical illness, and the long term impact on patients’ lives. He is an enormously productive and successful researcher with numerous publications in the field of critical care, and is a pioneer in the field of ICU survivorship. He is a devoted mentor and has received accolades from numerous societies

Dr. Molly Hayes is an Associate Professor of Medicine at Beth Israel Deaconess Medical Center and Harvard Medical School, the Director of the MICU at BIDMC, and the Director of External Education at the Carl J Shapiro Institute for Education and Research. She additionally is a co-founder of the BIDMC Center for Humanizing the ICU. Molly has been extensively involved with ATS with leadership roles in the Critical Care Assembly, and the newly minted Steering Committee on the Advancement of Learning.

Meet our Collaborators

The American Thoracic Society Critical Care Assembly is the largest Assembly in the American Thoracic Society. Their members include a diverse group of intensivists and care providers for both adult and pediatric critically ill patients. The primary goal of the Critical Care Assembly is to “improve the care of the critically ill through education, research, and professional development.”

Podcast: Play in new window | Download

72. PulmPEEPs and ATS Critical Care Assembly: A New Reality for Critical Care after Dobbs

Posted on May 16, 2024 by Pulm PEEPs

Welcome to our first episode of ATS 2024 highlighting content featured through the ATS Critical Care Assembly. Today we are going to be talking about one of the Critical Care Assembly Symposiums entitled: “A New Reality for Critical Care after Dobbs.”

Meet our Guests

Dr. Katie Hauschildt is a Faculty Research Associate at The Johns Hopkins University School of Medicine where she conducts research on equity in healthcare and critical illness recovery. She has her PhD in Sociology from the University of Michigan and an Advanced Fellowship in Health Services Research from the VA Ann Arbor Healthcare System, and is a board certified patient advocate.

Dr. Kathleen Akgün is an Associate Profess or Medicine at the Yale School of Medicine. She is the Association Section Chief for the VA section of Pulmonary, the Co-Director of the Network of Dedicated Enrollment Sites Program, the director of the MICU at the VA Connecticut health care system, and a member of the DEI Working Group at Yale.

Meet our Collaborators

References and Further Reading

Good Trouble Indiana: https://www.goodtroubleindiana.org/

McHugh K, Bosslet GT, Rouse C, Wilkinson T. Doctors think “advocate” is a dirty word. But it’s our ethical responsibility. STAT News. https://www.statnews.com/2023/06/01/caitlin-bernard-indiana-abortion-10-year-old-advocacy/. Published June 1, 2023.

MacDonald A, Gershengorn HB, Ashana DC. The Challenge of Emergency Abortion Care Following the Dobbs Ruling. JAMA. 2022;328(17):1691-1692. doi:10.1001/jama.2022.17197

Ashana DC, Chen C, Hauschildt K, et al. The Epidemiology of Maternal Critical Illness Between 2008-2021. Ann Am Thorac Soc. Published online June 14, 2023. doi:10.1513/AnnalsATS.202301-071RL

Sonntag E, Akgun KM, Bag R, et al. Access to Medically Necessary Reproductive Care for Individuals with Pulmonary Hypertension. Am J Respir Crit Care Med. Published online June 13, 2023. doi:10.1164/rccm.202302-0230VP

Griffin KM, Oxford-Horrey C, Bourjeily G. Obstetric Disorders and Critical Illness. Clin Chest Med. 2022;43(3):471-488. doi:10.1016/j.ccm.2022.04.008

Her Body, Our Laws: https://bookshop.org/p/books/her-body-our-laws-on-the-front-lines-of-the-abortion-war-from-el-salvador-to-oklahoma-michelle-oberman/9007091?ean=9780807089071

Watson K, Oberman M. Abortion Counseling, Liability, and the First Amendment. N Engl J Med 2023;389(7):663–7.

Podcast: Play in new window | Download

71. Fellows’ Case Files: University of New Mexico

Posted on May 7, 2024 by Pulm PEEPs

Today we’re visiting the University of New Mexico for another interesting entry in our Fellows’ Case Files.

Meet Our Guests

Neel Vahil is a second-year internal medicine resident at the University of New Mexico. He completed medical school at New York Medical College and is planning on applying to pulmonary critical care fellowship programs.

Ishan Patel is a third year PCCM fellow at the University of New Mexico and will be pursuing a second fellowship in clinical informatics this year. He completed medical school and residency in Internal Medicine at Oregon Health & Science University. His fellowship research has focused on clinical outcomes of intensivist-led ECMO programs.

Dr. Lucie Griffin completed her internal medicine residency and PCCM fellowship at the University of New Mexico and is currently the Director of the Albuquerque VA medical intensive care unit.

Case Presentation

A 69 year old male veteran who presents with 6 weeks of weight loss, cough, and malaise. He has ongoing tobacco use, and history of rheumatoid arthritis on HCQ and weekly MTX with etanercept, which he had stopped taking in the three prior months. Vitals: Afebrile, mildly tachycardic to 101, BP of 93/59, saturating appropriately on room air without any signs of respiratory distress