Category Archives: Procedures

ED Thoracotomy: Kids ARE Just Small Adults

You’ve undoubtedly read this trite phrase somewhere in your training: “Kids aren’t just small adults!” There are many examples where this is absolutely true. Think about arterial extravasation in solid organ injury. Or severe traumatic brain injury. There are major differences in treatment aggressiveness for both of these.

But what about the code situation? I’ve noted a peculiar phenomenon over the years with regard to pediatric codes of all kinds. Adults tend to persist far longer at resuscitative efforts over children than they normally would on other adults. And what about that most extreme code situation, the emergency thoracotomy?

I’ve also seen the use of this procedure in children who don’t meet the usual adult criteria. But they are kids, right? They can bounce back from more severe insults, right? I hope that I’ve convinced you over the years that one can’t just assume and generalize anything. Things that seem like so much common sense often turn out to be wrong. Think back to the days of the stress / spicy food theory of peptic ulcer disease. This seems so silly now that we recognize the role of H. Pylorii.

Scripps Mercy adult and Rady Children’s Hospital pediatric trauma centers in San Diego performed an extensive review of the National Trauma Data Bank over a three year period. They focused on patients 16 years of age or less who underwent ED thoracotomy within 30 minutes of arrival at the trauma center. They focused on procedure indications and the eventual outcomes.

Here are the factoids:

  • A total of 114 patients were recorded in the NTDB, with a mean age of 10 years and median Injury Severity Score of 26 (this is the three year experience in the entire US in three years!)
  • Males were disproportionately involved at 69%, although this is less than in adults
  • Thoracotomy was performed promptly, with a median time after arrival of 5 minutes
  • Mechanism of injury was almost evenly split between penetrating (56%) and blunt (44%)
  • Blunt mechanism mortality was 94% vs 88% for penetrating
  • Penetrating injury outside of the thorax was uniformly fatal
  • Patients without signs of life on arrival, regardless of mechanism, also had a 100% mortality rate
  • Treatment at an adult trauma center, freestanding pediatric center, or combined center had no impact on these dismal outcomes

Bottom line: This is an interesting paper, and shows that the outcomes after ED thoracotomy in kids is even more dismal than in adults. This is particularly true for children arriving without vital signs and for penetrating abdominal trauma.

However, the authors go on to suggest a practice guideline for pediatric emergency thoracotomy similar to the EAST adult guidelines based on their study findings. However, I think this is ill advised. Have a look at the absolute numbers:

The largest subgroup has only 29 patients in it. These numbers are way too small to consider a guidelines change.

This paper shows that kids are just small adults when it comes to ED thoracotomy. And they seem to do even more poorly with no vital signs or penetrating injuries outside of the chest. So think carefully the next time you must consider this procedure in a child.

Reference: Nationwide Analysis of Resuscitative Thoracotomy in Pediatric Trauma Time to Differentiate from Adult Guidelines? J Trauma published ahead of print, July 6, 2020.

 

Print Friendly, PDF & Email

Can Chest Tube Insertion Result In Exposure To Coronavirus?

Endotracheal intubation is considered an aerosol-producing procedure. In this new age of SARS-CoV-2 and COVID-19, most hospitals are stepping up the level of personal protective equipment (PPE) used when performing this procedure. This has also resulted in modifications in the location where intubation is performed and the choice of drugs used.

But what about needle and chest thoracostomy? These are different than intubation in that the respiratory tract is usually not directly accessed. However, there is the opportunity for exposure to pleural fluid. In the case of needle thoracostomy, it is possible that air under pressure in the chest can force tiny droplets or even an aerosol out and into the air. There is less likelihood of aerosolization during tube thoracostomy, where liquid and droplet exposure can be anticipated.

What do we know about pleural fluid and the novel coronavirus? Basically nothing. And there is very little literature out there regarding other respiratory viruses in pleural fluid either. The only paper I could find (reference below) was published five years ago by a Spanish group. They compared the presence of bacteria and viruses in the pleural fluid of patients with community acquired pneumonia against an uninfected control group. They found only one incidence of virus in the pleural fluid in one patient, a human metapneumovirus. Is this comforting? Probably not.

Trauma patients with chest trauma are likely very different. Those with a hemo- or pneumo-thorax, by definition, had some violation of the surface of the lung. to cause the leak This injury is very likely to breach alveoli which are laden with coronavirus, thus contaminating the pleural fluid. Once that occurs, it is possible that the entire thorax surrounding the lung is contaminated. Note: this is one of those “common sense” assumptions with absolutely no data currently to back it up.

Bottom Line: This is yet another of the many questions about SARS-CoV-2 that we just don’t have an objective answer to. However, since we are already limiting exposure during or forgoing laparoscopic procedures altogether to avoid vaporizing viral particles in smoke, it makes sense to protect ourselves during procedures that involve pleural fluid in trauma patients.

Until we have more data, needle and tube thoracostomy procedures should be considered at least a droplet-prone procedure, if not an aerosol-producing one. This means that trauma professionals should don appropriate personal protective equipment as dictated by their local policies and procedures before performing these procedures.

Reference: Detection of bacteria and viruses in the pleural effusion of children and adults with community-acquired pneumonia. Future Microbiology 10(6):909-916, 2015.

Print Friendly, PDF & Email

COVID-19 Thinking Cap: How To Protect Personnel During Intubation (Video)

There is a fascinating letter in the New England Journal of Medicine submitted by authors from the Boston Medical Center and Brigham and Women’s Hospital. Like all trauma professionals, they were concerned with droplet contamination produced during the intubation process. Most hospitals have modified their intubation procedures to try to protect personnel as much as possible.

The authors designed a Plexiglas box with two holes for the arms of the intubator that is placed over the patient’s head. This should serve to shield them, and other personnel in the room if the patient unexpectedly coughs during the process. They tested this concept using an intubation mannequin. First, they placed a balloon filled with fluorescent dye in its mouth and slowly inflated until it burst. Here was the result when viewed under ultraviolet light. Sputum everywhere!

Next, they placed the intubation shield over the patient. Here is a drawing of its dimensions.

The device is open on the bottom and on the side away from the intubator. The arm holes are 10cm in diameter.

The authors then repeated the balloon experiment with the shield in place and the intubator’s arms inserted through the holes. The resulting contamination was limited to their hands and forearms, and the inside of the shield.

Bottom line: This is a very interesting yet simple and cheap device that can be built by just about anyone and should protect personnel from droplet contamination. It will not have much effect on aerosols escaping into the room, but that’s what our other PPE are for! It’s a great example of how creativity is key in keeping us all safer during this pandemic.

You can view the video on the NEJM website at:
https://www.nejm.org/doi/full/10.1056/NEJMc2007589

Reference: Barrier Enclosure during Endotracheal Intubation. NEJM DOI: 10.1056/NEJMc2007589, April 4 2020.

Print Friendly, PDF & Email

Air Embolism From an Intraosseous (IO) Line

IO lines are a godsend when we are faced with a patient who desperately needs access but has no veins. The tibia is generally easy to locate and the landmarks for insertion are straightforward. They are so easy to insert and use, we sometimes “set it and forget it”, in the words of infomercial guru Ron Popeil.

But complications are possible. The most common is an insertion “miss”, where the fluid then infuses into the knee joint or soft tissues of the leg. Problems can also arise when the tibia is fractured, leading to leakage into the soft tissues. Infection is extremely rare.

This photo shows the inferior vena cava of a patient with bilateral IO line insertions (black bubble at the top of the round IVC).

During transport, one line was inadvertently disconnected and probably entrained some air. There was no adverse clinical effect, but if the problem is not recognized and the line is not closed properly, there could be.

Bottom line: Treat an IO line as carefully as you would a regular IV. You can give anything through it that can be given via a regular IV: crystalloid, blood, drugs. And even air, so be careful!

Print Friendly, PDF & Email

Trends In IVC Filter Placement And Retrieval

Yesterday, I reviewed a paper that highlighted a single-institution experience for IVC filter usage. Today, let’s look at a much larger pool of data.

Placement of a filter in the inferior vena cava (IVC) is one of the many tools for managing pulmonary embolism. There was a significant increase in filter placement during the 1990s and 2000s due to a broadening of the indications for its use.  There has been continuing debate over the complications and efficacy of use of this device.

A paper from NYU Langone Health in New York City, the Harvey L. Neiman Health Policy Institute, and Georgia Institute of Technology School of Economics looked a long-term trends in IVC filter use in the Medicare population. They scanned a Centers for Medicare and Medicaid Services (CMS) database over the 22 year period from 1994 to 2015. They specifically analyzed trends in insertion, removal, placement setting, and specialty of the inserting physician.

Here are the factoids:

  • 2008 seemed to be the heyday of IVC filter insertion. Rates nearly tripled by 2008, but have declined about 40% since then (see below). Pay attention to the retrieval rates.

  • Overall, filters were most commonly placed by radiologists, followed by surgeons and cardiologists. Here’s the diagram above broken down by specialty.

  • This chart shows the market share of each specialists inserting IVC filters during the study period. Of note, radiologists continue to increase and surgeons are decreasing.

Bottom line: This study shows some interesting data, but can’t be completely applied to trauma patients because it focuses on Medicare recipients. But the trends are valid. IVC filter use peaked in 2008 and has been declining ever since. Radiologists place more filters than other specialties, and their market share continues to increase.

Most disturbing is the low filter retrieval rate, similar to what was seen in yesterday’s post. Device manufacturers recommend removal of most filters, but timeframes are not specified. The real bottom line is that we have an indwelling device which works well in very limited situations only, can cause long term complications, and that we frequently forget to remove. It behooves all trauma professionals to develop strict guidelines for both use and removal.

Reference: National Trends in Inferior Vena Cava Filter Placement and Retrieval Procedures in the Medicare Population Over Two Decades. J Am Coll Radiol 15:1080-1086, 2018.

Print Friendly, PDF & Email