Tag Archives: EMS

General

Helicopter Transport of Trauma Patients Saves Lives

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Helicopter EMS (HEMS) transport of trauma patients is used primarily to decrease the amount of time between injury and arrival at the trauma center. Unfortunately, efficacy studies have provided conflicting answers as to whether this is actually true. Last year, the CDC completed a large sample study of this issue using the National Trauma Data Bank (NTDB) in an attempt to determine if HEMS flights are effective.

Using almost 150,000 entries in the NTDB for 2007, they were able to isolate over 56,000 adult records with complete data points. They looked for mortality patterns based on age, injury severity, and revised trauma score, comparing patients who were transported by air vs ground.

They found the following:

  • Odds of dying in-hospital were 39% lower overall when transported by helicopter
  • This survival advantaged disappeared for patients age 55 and older, possibly because of decreased reserve, comorbidities, more complications, or medications that interfere with successful resuscitation
  • Regardless of type of transport, males always fared worse than females

Bottom line: This is a large and intriguing study. About 85% of the US population has access to a Level I or II trauma center within an hour. However, a third of those can only get there in that period of time if transported by air. This mode of transport has a significantly lower mortality rate. However, there are cost and safety considerations as well. The key now is to figure out which patients will have the best outcomes after air transport. This will require more work, looking at more than just mortality (e.g. disability, complications). And what’s the deal with men having poorer outcomes???

Reference: Reduced mortality in injured adults transported by helicopter emergency medical services. Prehospital Emerg Care 15(3):295-302, 2011.

General

Trauma Patient Transport By Police, Not EMS

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When I was at Penn 25 years ago, I was fascinated to see that police officers were allowed to transport penetrating trauma patients to the hospital. They had no medical training and no specific equipment. They basically tossed the patient into the back seat, drove as fast as possible to a trauma center, and dropped them off. Then they (hopefully) hosed down the inside of the squad car.

Granted, it was fast. But did it benefit the patient? The group now at Penn decided to look at this to see if there was some benefit (survival) to this practice. They retrospectively looked at 5 years of data in the mid-2000’s, thus comparing the results of police transport with reasonably state of the art EMS transport.

They found over 2100 penetrating injury transports during this time frame (!), and roughly a quarter of those (27%) were transported by police. About 71% were gunshots vs 29% stabs. They found the following interesting information:

  • The police transported more badly injured patients (ISS=14) than EMS (ISS=10)
  • About 21% of police transports died, compared to 15% for EMS
  • But when mortality was corrected for the higher ISS transported by police, it was equivalent for the two modes of transport

Although they did not show a survival benefit to this practice, there was certainly no harm done. And in busy urban environments, such a policy could offload some of the workload from busy EMS services.

Bottom line: Certainly this is not a perfect paper. But it does add more fuel to the “stay and play” vs “scoop and run” debate. It seems to lend credence to the concept that, in the field, less is better in penetrating trauma. What really saves these patients is definitive control of bleeding, which neither police nor paramedics can provide. Therefore, whoever gets the patient to the trauma center in the least time wins. And so does the patient.

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Reference: Injury-adjusted mortality of patients transported by police following penetrating trauma. Acad Emerg Med 18(1):32-37, 2011.

General

Trauma Survival and Air vs Ground Transport

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Wartime experience has shown that rapid transport from the battlefield scene of injury to definitive care dramatically improves survival. This has been translated into civilian trauma care by making helicopter transport to a trauma center more widely available. But this resource is still somewhat limited, and very expensive compared to ground EMS transport. Is this expense warranted, or in other words, does it improve survival?

Many have tried to answer this question. Several of these studies did show improved survival with air transport, but most had significant flaws that made their conclusions hard to interpret. The current issue of JAMA has published an article from MIEMSS and Johns Hopkins that tries to do it right.

The authors used the National Trauma Data Bank (1.8M records) and whittled it down to 223K by using pertinent exclusion criteria. About 25% were transported by air and 72% were taken to Level I centers (vs Level II). A sophisticated regression model was used to adjust for missing data and clustering by trauma centers.

They found that there is roughly a 1.5% survival advantage in taking patients to trauma centers by air. About 65 patients need to be transported to a Level I center, or 69 patients to a Level II center, to save a life. There are some issues with the statistics, primarily due to the nature of the NTDB data, but overall the paper is nicely done.

Bottom line: It looks like helicopter transport of seriously injured trauma patients conveys a very small survival advantage. However, this does not mean that everybody now needs to be flown in. This is not an ideal world, and not everybody is in an area that can provide such transport. Furthermore, in many areas ground EMS is still faster than air. And finally, air transport is much more expensive than the incremental survival increase may be worth. We will have to come to grips as a society to figure out what we can really afford.

Reference: Association between helicopter vs ground emergency medical services and survival for adults with major trauma. JAMA 307(15):1602-1610, April 18, 2012.

Prehospital

Prehospital To Trauma Team Handoff: A Solution

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I’ve written about handoffs between EMS and the trauma team over the past two days. It’s a problem at many hospitals. So what to do?

Let’s learn from our experience in the OR. Best practice in the operating room mandates a specific time out process that involves everyone in the OR. Each participant in the operation has to stop, identify the patient, state what the proposed procedure and location is, verify that the site is marked properly, and that they have carried out their own specific responsibilities (e.g. infused the antibiotic).

Some trauma centers have initiated a similar process for their trauma team as well. Here’s how it works:

  • The patient is rolled into the resuscitation room by EMS personnel, but remains on the stretcher.
  • Any urgent cares continue, such as ventilation.
  • The trauma team leader is identified and the EMS lead gives a brief report while everyone in the room listens. The report consists of only mechanism, all identified injuries, vital signs (including pupils and GCS), any treatments provided. This should take no more than 30 seconds.
  • An opportunity for questions to be asked and answered is presented
  • The patient is moved onto the hospital bed and evaluation and treatment proceed as usual.
  • EMS personnel provide any additional information to the scribe, and may be available to answer any additional questions for a brief period of time.

Bottom line: This is an excellent way to improve the relationship between prehospital and trauma team while improving patient care. It should help increase the amount of clinically relevant information exchanged between care providers. Obviously, there will be certain cases where such a clean process is not possible (e.g. CPR in progress). I recommend that all trauma programs consider implementing this “Trauma Activation Time Out For EMS” concept.


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Prehospital

EMS Handoff: Comments

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I received quite a bit of feedback from yesterday’s column. Obviously this topic strikes a chord with my readers. Here was one well thought out comment from Tim Kaye in California:

I have worked for 15 years as a paramedic in a very busy EMS system in Northern California. When I was new, I used to fight to make myself heard in the trauma room, only adding to the din and chaos, which was usually – and rightly so – squelched by a decisive bark from the trauma team leader for quiet as they assesed the critical patient. What I came to realize was that if I wanted to benifit my patient, I needed to re-invent how I was taught to give my reports. Instead of trying to include everything in a minutes-long speech, I would instead follow this pattern:

1) Ask as I was walking in who I would give report to, thereby establishing clear communication and not just shouting to no one in particular.

2) A very brief, one sentence explination of MOI, and I forced myself to hold fast to the one sentence rule.

3) Critical findings/life-threats were reported next, followed by any interventions. This gave the trauma team leader an idea of where to focus their exam for similar life-threats.

4) I would give only selected vital signs in my rapid report. These included anything aberant or concering, followed by heart rate, respiratory rate and end-tidal CO2 on all patients.

5) I would conclude by asking the trauma team leader specifically if they had any immediate questions.

Because I structure and practice this method, my reports typically last about 20-30 seconds. Realizing that there are major gaps in the initial report, I then go and speak directly to the scribe and fill in those gaps with such information as further description of MOI, a complete set of vital signs and trends, blood glucose, IV sites, etc.

This method allows for rapidly communicating vital information quickly, and detailed information to the appropriate staff member at the appropriate time.

To tie up any loose ends, after I completed my charting, I ALWAYS stop by the trauma bay and check one last time with both the trauma team leader and the scribe and ask if they have any more questions. As I made this my practice, ER attendings, trauma surgeons and nurses all came to expect this final check-in to clear up any last questions. This worked in a most excellent fashion to provide continuity of care, to develop relationships with all of the staff at our two Level-1 and one Level-2 centers, and for personal education as I checked in to what the diagnosis and course of treatment was for the patient.

I would argue that the handoff is really a two-way process. Tim has found a way to do the right thing in an environment where the other half of the team is too busy / not listening / not aware.

Tomorrow I’ll share what I think is the best approach to this process. Hint: it involves active participation by both sets of trauma professionals.

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