The EMS Lighthouse Project

We’ve spoken a lot recently about intubation First-Pass Success, including the definition. We’ve also discussed different papers about the impact the type of laryngoscope, video or direct, has on first-pass success. A new paper compares video vs. direct laryngoscopy directly. Join us to discuss the DEVICE trial.

Citations: 
1) Prekker ME, Driver BE, Trent SA, et al. Video versus Direct Laryngoscopy for Tracheal Intubation of Critically Ill Adults. N Engl J Med. Published online June 16, 2023 
2) Jarvis JL, McClure SF, Johns D. EMS Intubation Improves with King Vision Video Laryngoscopy. Prehosp Emerg Care. 2015 
3) Ducharme S, Kramer B, Gelbart D, Colleran C, Risavi B, Carlson JN. A pilot, prospective, randomized trial of video versus direct laryngoscopy for paramedic endotracheal intubation. Resuscitation. 2017 
4) Pourmand A, Terrebonne E, Gerber S, Shipley J, Tran QK. Efficacy of Video Laryngoscopy versus Direct Laryngoscopy in the Prehospital Setting: A Systematic Review and Meta-Analysis. Prehosp Disaster Med. 2023 
5) Brown CA, Kaji AH, Fantegrossi A, et al. Video Laryngoscopy Compared to Augmented Direct Laryngoscopy in Adult Emergency Department Tracheal Intubations: A National Emergency Airway Registry (NEAR) Study. Acad Emerg Med. 2020 
6) Hansel J, Rogers AM, Lewis SR, Cook TM, Smith AF. Videolaryngoscopy versus direct laryngoscopy for adults undergoing tracheal intubation: a Cochrane systematic review and meta-analysis update. British Journal of Anaesthesia. 2022

What even is FPS? There's been a long-running argument about the definition of FPS. By argument, I mean mostly established in the literature, with some people not liking it. FPS is successful ET passage through the cords within 1 attempt at laryngoscopy or when the blade passes the teeth.

That definition worked well when we were using direct laryngoscopy, where the hard part of intubation was visualization and the easy part was tube passage. But does it still hold in the age of VL, where visualization is easy, and tube passage is the hard part? We discuss a paper on this episode that proposes a new definition that perhaps better meets the needs of the VL era.

Citation:

Trent SA, Driver BE, Prekker ME, et al. Defining Successful Intubation on the First Attempt Using Both Laryngoscope and Endotracheal Tube Insertions: A Secondary Analysis of Clinical Trial Data. Annals of Emergency Medicine. Published online April 2023:S0196064423002135. doi:10.1016/j.annemergmed.2023.03.021

A new study describes the utility of post-mortem CT panscans in patients who died either in the field or in the ED to identify mortal and potentially mortal injuries. This paper has a couple of surprising findings that can help EMS focus our efforts on caring for these patients. 

Citations: 
1. Levin JH, Pecoraro A, Ochs V, Meagher A, Steenburg SD, Hammer PM. Characterization of fatal blunt injuries using post-mortem computed tomography. J Trauma Acute Care Surg. 2023; Publish Ahead of Print. 
2. Sakles JC, Ross C, Kovacs G. Preventing unrecognized esophageal intubation in the emergency department. JACEP Open. 2023;4(3):e12951. 3. Chrimes N, Higgs A, Hagberg CA, et al. Preventing unrecognised oesophageal intubation: a consensus guideline from the Project for Universal Management of Airways and international airway societies*. Anaesthesia. 2022;77(12):1395-1415.

DSI (delayed sequence intubation) has been proposed as an alternative to RSI (rapid sequence intubation) for patients who can't tolerate interventions needed to properly pre-oxygenate patients. But does it work? There have been several observational studies (blatant bias acknowledgment: I wrote one of them!) suggesting it is safe and effective, but no randomized trials. Well, now we have one. Join Dr. Jarvis as he describes this RCT of DSI vs RSI in adult trauma patients presenting to an Indian ED.

Citation: Bandyopadhyay A, Kumar P, Jafra A, Thakur H, Yaddanapudi LN, Jain K. Peri-Intubation Hypoxia After Delayed Versus Rapid Sequence Intubation in Critically Injured Patients on Arrival to Trauma Triage: A Randomized Controlled Trial. Anesthesia & Analgesia. 2023;136(5):913-919.

In episode 69, we interviewed Tanner Smida about his very interesting paper using the ESO dataset. It looked at the association between survival from out-of-hospital cardiac arrest and the type of SGA used (iGel vs. KingLT). He found 36% higher odds of survival with iGel. 

The ink was barely dry on that paper before he published a follow-up paper looking at the same association but with a different dataset, this time CARES and the national US registry of OHCA. 

Citations: 
1. Smida T, Menegazzi J, Scheidler J, Martin PS, Salcido D, Bardes J. A retrospective comparison of the King Laryngeal Tube and iGel supraglottic airway devices: a study for the CARES surveillance group. Resuscitation. Published online April 2023:109812. doi:10.1016/j.resuscitation.2023.109812 
2. Smida T, Menegazzi J, Crowe R, Scheidler J, Salcido D, Bardes J. A Retrospective Nationwide Comparison of the iGel and King Laryngeal Tube Supraglottic Airways for Out-of-Hospital Cardiac Arrest Resuscitation. Prehospital Emergency Care. Published online January 18, 2023:1-13. doi:10.1080/10903127.2023.2169422

Man, did we have fun recording this one? I found myself in a hotel room in Ashland, Oregon, with Drs. Ed Racht, Maia Dorsett, and Ritu Sahni talking about Sepsis. We decided this would make for a great crossover episode with The EMS Show, minus our buddy Mikey V. Anytime I get together with this group of friends, I always have fun. We discuss a new sepsis trial, the OG sepsis paper, Dr. River's Early Goal Direct Therapy, and the cautionary tale of performance measures gone awry. We also hit on using EtCO2 as a surrogate for lactate in sepsis and collectively decided Dr. Dorsett is a rockstar. 

Citation: The National Heart, Lung, and Blood Institute Prevention and Early Treatment of Acute Lung Injury Clinical Trials Network. Early Restrictive or Liberal Fluid Management for Sepsis-Induced Hypotension. N Engl J Med. 2023;388(6):499-510. doi:10.1056/NEJMoa2212663

The cage match you've all been waiting for! iGel vs King LT in cardiac arrest. Which is associated with higher survival?

Airways-2 was an RCT of iGel vs. ETI in OHCA and found no difference. PART was an RCT of King LT vs. ETI in OHCA and found a slight difference favoring King LT. How about those patients just getting an SGA? How does the iGel compare to King LT? Dr. Jarvis interviews the amazing young researcher and medical student Tanner Smida about his new paper using the ESO dataset to answer this question. 

Citation: Smida T, Menegazzi J, Crowe R, Scheidler J, Salcido D, Bardes J. A Retrospective Nationwide Comparison of the iGel and King Laryngeal Tube Supraglottic Airways for Out-of-Hospital Cardiac Arrest Resuscitation. Prehospital Emergency Care. Published online January 18, 2023:1-13.

Remember AIRWAYS-2, the British RCT comparing iGel to ETI in adults with cardiac arrest? Have you wondered if those results would hold up in a different prehospital population? Wonder no more! Dr. Jarvis reviews the SAVE Trial, another RCT of adult, non-traumatic cardiac arrest, comparing iGel to ETI in Taiwan. 

Citation: Lee AF, Chien YC, Lee BC, et al. Effect of Placement of a Supraglottic Airway Device vs Endotracheal Intubation on Return of Spontaneous Circulation in Adults With Out-of-Hospital Cardiac Arrest in Taipei, Taiwan: A Cluster Randomized Clinical Trial. JAMA Netw Open. 2022;5(2):e2148871. doi:10.1001/jamanetworkopen.2021.48871

If one is good, two must be better, right? If it applies to cookies and ice cream, why not defibrillators? That’s the question the DOSED-VF trial set out to answer. We’ve covered this topic in episodes 12 and 27, including going over the pilot trial of DOSED-VF. But now the full meal deal is available. And you may have heard it was stopped early because… well, you’d best listen to find out. 

 As a special bonus, Dr. Jarvis explains the difference between odds and risk after falling into the statistical rabbit hole. Remember, this podcast also has a YouTube version complete with graphs and charts (oh, my!): https://www.youtube.com/@FlightbridgeedHEMS/playlists

Citations: 
1. Cheskes S, Verbeek PR, Drennan IR, et al. Defibrillation Strategies for Refractory Ventricular Fibrillation. N Engl J Med. 2022;387(21):1947-1956. doi:10.1056/NEJMoa2207304 
Other papers discussed in this episode: 
2. Mapp JG, Hans AJ, Darrington AM, et al. Prehospital Double Sequential Defibrillation: A Matched Case-Control Study. Braithwaite SA, ed. Academic Emergency Medicine. 2019;26(9):994-1001. doi:10.1111/acem.13672 
3. Beck LR, Ostermayer DG, Ponce JN, Srinivasan S, Wang HE. Effectiveness of Prehospital Dual Sequential Defibrillation for Refractory Ventricular Fibrillation and Ventricular Tachycardia Cardiac Arrest. Prehosp Emerg Care. 2019;23(5):597-602. doi:10.1080/10903127.2019.1584256 
4. Cabanas JG, Myers JB, Williams JG, De Maio VJ, Bachman MW. Double Sequential External Defibrillation in Out-of-Hospital Refractory Ventricular Fibrillation: A Report of Ten Cases. Prehosp Emerg Care. 2015;19(1):126-130. doi:10.3109/10903127.2014.942476 
5. Cheskes S, Dorian P, Feldman M, et al. Double sequential external defibrillation for refractory ventricular fibrillation: The DOSE VF pilot randomized controlled trial. Resuscitation. 2020;150:178-184. doi:10.1016/j.resuscitation.2020.02.010 
6. Ranganathan P, Aggarwal R, Pramesh C. Common pitfalls in statistical analysis: Odds versus risk. Perspect Clin Res. 2015;6(4):222. doi:10.4103/2229-3485.167092

Dr. Crowe returns to the EMS Lighthouse Project Podcast from our “vacation” in Mexico to discuss the impact of variations between pulse oximetry and blood gas values across races.

Citations:

1. Sudat SEK, Wesson P, Rhoads KF, et al. Racial Disparities in Pulse Oximeter Device Inaccuracy and Estimated Clinical Impact on COVID-19 Treatment Course. Am J Epidemiol. Published online September 2022:kwac164. doi:10.1093/aje/kwac164
2. Fawzy A, Wu TD, Wang K, et al. Racial and Ethnic Discrepancy in Pulse Oximetry and Delayed Identification of Treatment Eligibility Among Patients With COVID-19. JAMA Intern Med. 2022;182(7):730. doi:10.1001/jamainternmed.2022.1906