Category Archives: Guidelines

Abstracts, Guidelines, Imaging

Best Of EAST 2023 #5: Imaging The Elderly

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Several papers have been published over the years regarding underdiagnosis when applying the usual imaging guidelines to elderly trauma patients. Unfortunately, our elders are more fragile than the younger patients those guidelines were based on, leading to injury from lesser mechanisms. They also do not experience pain the same way and may sustain serious injuries that produce no discomfort on physical exam. Yet many trauma professionals continue to apply standard imaging guidelines that may not apply to older patients.

EAST sponsored a multicenter trial on the use of CT scans to minimize missed injuries. Eighteen Level I and Level II trauma centers prospectively enrolled elderly (age 65+) trauma patients in the study over one year. Besides the usual demographic information, data on physical exams, imaging studies, and injuries identified were also collected. The study sought to determine the incidence of delayed injury diagnosis, defined as any identified injury that was not initially imaged with a CT scan.

Here are the factoids:

  • Over 5,000 patients were enrolled, with a median age of 79
  • Falls were common, with 65% of patients presenting after one
  • Nearly 80% of patients actually sustained an injury (!)
  • Head and cervical spine were imaged in about 90% of patients, making them the most common initial studies
  • The most commonly missed injuries involved BCVI (blunt carotid and vertebral injury) or thoracic/lumbar spine fractures
  • 38% of BCVI injuries and 60% of T/L spine fractures were not identified during initial imaging
  • Patients who were transferred in, did not speak English, or suffered from dementia were significantly more likely to experience delayed diagnosis

The authors concluded that about one in ten elderly blunt trauma patients sustained injuries in body regions not imaged initially. They recommended the use of imaging guidelines to minimize this risk.

Bottom line: Finally! It has taken this long to perform a study that promotes standardizing how we perform initial patient imaging after blunt trauma. Granted, this study only applies to older patients, but the concept can also be used for younger ones. The elderly version must mandate certain studies, such as head and the entire spine. Physical exams can  still be incorporated in the guidelines for younger patients but not the elderly.

The overall incidence of BCVI was low, only 0.7%. But its presence was missed in 38% of patients, setting them up for a potential  stroke. Some way to incorporate CT angiography of the neck will need to be developed. The risk / benefit ratio of the contrast load vs. stroke risk will also have to be determined.

Here are my questions and comments for the presenter/authors:

  • Did you capture all of the geriatric patients presenting to the study hospitals? By my calculation, 5468 patients divided by 18 trauma centers divided by 14 months of study equals 22 patients enrolled per center per month. Hmm, my center sees more than that number of elderly injured patients in the ED per day! Why are there so few patients in your study? Were there some selection criteria not mentioned in the abstract?
  • Why should we believe these study numbers if you only included a subset of the total patients that were imaged?

My own reading of the literature leads me to believe that your conclusions are correct. I believe that all centers should develop or revise their elderly imaging guidelines to include certain mandatory scans regardless of how benign the physical exam appears. Our elders don’t manifest symptoms as reliably as the young. But the audience needs a little more information to help them understand some of the study numbers.

Reference: SCANNING THE AGED TO MINIMIZE MISSED INJURY, AN EAST MULTICENTER TRIAL. EAST 2023 podium abstract #12.

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Guidelines

Serial Abdominal Examination: The Practice Guideline

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Last week, I published a preliminary practice guideline for nonoperative management of abdominal stab wounds. Click here to view it. A key part of that guideline is the serial abdominal exam. Surgeons talk about this a lot, but how do you do it? I posted about many of the details here.

The serial exam is nuanced enough so that it deserves its own clinical practice guideline! You won’t find this in any doctor or nursing books. It’s really simple, but the devil is truly in the details.

Click this image or the link below to download the guideline. I’ve also posted a Microsoft publisher version in case you want to modify it to suit your center.

Please feel free to email or post comments and questions in the area below this post!

References:

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Abdomen, Guidelines

Nonoperative Management Of Abdominal Stab Wounds: The Practice Guideline!

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In my previous post, I reviewed a new paper that examined the appropriate amount of time that patients should be observed for nonoperative manage of an abdominal stab wound. Many of you know that I am a fanatic of properly crafted clinical practice guidelines (CPG). I decided to make a first pass at converting the LAC+USC group’s paper to something that will be helpful at the bedside.

This CPG incorporates the patient selection and timing information published in the paper. It breaks the process down into easily followed tasks, and fills in the blanks for shift to shift management. The CPG is displayed in an “if this, then do that” format. This firms up decision making and makes it easier for your trauma program to monitor compliance with it.

A note about CPGs: they generally cover about 90% of clinical cases. Obviously, they cannot provide guidance for certain rare combinations of circumstance. In that case, the trauma professional should do what they think is right for that situation. Most importantly, they should document this rationale in a progress note.

Here are answers to some of your questions in advance:

  • Patients should not be kept at bed rest. This is always bad.
  • There is no reason to keep the patient NPO. A very small percentage of patients actually fail. It makes no sense to starve everybody for the one or two patients that need to go to the OR each year. Anesthesiologists at trauma centers are very skilled at providing safe intubation in all patients. As you all know, every trauma activation patient coming into your trauma bay needing intubation has just finished a seven course meal!
  • Give your patient clear discharge instructions! They need to know what they can do, and what to look for if things eventually go awry.

And please leave comments and suggestions for improvements in the reply box below or by email to [email protected] There are always ways to make CPGs even better! I have also included a Microsoft Publisher file so you can modify this guideline to better suit your trauma center.

In my next post, I’ll publish the serial abdominal observation CPG I mention in this one.

Resources:

  1. Download a pdf file of the guideline
  2. Download a Publisher file of the guideline

 

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Guidelines

Massive Transfusion: What Ratios Are People Using?

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Back in the old days (which I remember fondly), we didn’t pay too much attention to the ratio of blood to plasma. We gave a bunch of bags of red cells, then at some point we remembered that we should give some plasma. And platelets? We were lucky to give any! And to top it all off, we gave LOTS of crystalloid. Turns out this was not exactly the best practice.

But things have changed. Some good research has shown us that a nice mix of blood component products is good and too much crystalloid is bad. But what exactly is the ideal mix of blood products? And what is everybody else doing?

What are all the other trauma centers doing? An interesting medley of anesthesia and pathology groups from the University of Chicago, a Dallas-based anesthesia group, and a blood center in my home base of St. Paul, conducted a survey of academic medical centers back in 2016. They wanted to find out how many actually had a MTP and to scrutinize the details.

They constructed a SurveyMonkey survey and sent it to hospitals with accredited pathology residencies across the US. There were 32 questions in the survey, which asked for a lot of detail. As you can probably personally attest, the longer and more complicated the survey, the less likely you are to respond. That certainly happened here. Of 107 surveys sent out, it took a lot of nagging (initial email plus two nags) to get a total of 56 back.

Here are the factoids:

  • Most were larger hospitals, with 74% having 500 or more beds
  • All had massive transfusion protocols
  • Trauma center level: Level I (77%), Level II (4%), Level III (4%), Level IV (2%), no level (14%)
  • Nearly all (98%) used a fixed ratio MTP; very few used any lab-directed (e.g. TEG/ROTEM) resuscitation
  • Target RBC:plasma ratio: 1:1 (70%), 1.5:1 (9%), 2:1 (9%), other (9%)
  • Only 58% had the same RBC:plasma ratio in each MTP cooler
  • More than 86% had thawed plasma available (remember, these were generally large academic centers)
  • Half stored uncrossmatched type O PRBCs outside the blood bank, usually in the ED; only 1 stored thawed plasma in the ED
  • A total of 41% had more than one MTP (trauma, OB, GI, etc.)
  • 84% had some type of formal review process once the MTP was complete
  • About 68% had modified their MTP since the original implementation. Some increased or decreased ratios, expanded MTP to non-trauma services, decreased the number of units in each pack, changed to group A plasma from AB, or switched from ratio to TEG/ROTEM or back.

Bottom line: This is an intriguing snapshot of MTP practices around the country that is about six years old. Also remember, this is a somewhat skewed dataset. The survey was directed toward hospitals with academic pathology programs, not trauma centers. However, there is enough overlap that the results are probably generalizable. 

Most centers are (were) using MTP packs containing six units of PRBCs, and were attempting to achieve a fixed 1:1 ratio. Half of hospitals had the same number of units in each cooler, half varied them by cooler number. Nearly half had multiple flavors of MTP for different specialties. Very few used TEG/ROTEM during the initial phased of MTP. Most modified their MTP over time.

Unfortunately, I’ve not seen a similar survey repeated recently. I’m certain that practices have changed over time as our understanding of balanced resuscitation continues to advance. 

Finally, I’ve written quite a lot on most of these issues. See the links to my “MTP Week” series below.

Reference: Massive Transfusion Protocols: A Survey of Academic
Medical Centers in the United States. Anesth & Analg 124(1):277-281, 2017.

MTP week series:

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Guidelines

When To Call Your Ophthalmology Consultant

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And yes, another consultant reference card. As I wrote previously. we sometimes overuse our consultants and call then at inappropriate times. So what if we diagnose an injury in their area of expertise at 2 am? Does it need attention or an operation before morning? If not, why call at that ungodly hour?

Let’s use our consultants wisely! I’ve listed most of the common eye diagnoses that trauma professionals will encounter. There is also an indication of what you need to do, and exactly when to call your consultant.

Unfortunately, this one won’t fit on a 3×5 index card that you can keep in your pocket. I’ve included a printable pdf file, as well as the original Microsoft Word file in case you want to make a few modifications to suit your own hospital.

Enjoy!

When to call Ophthalmology reference card (pdf)

When to call Ophthalmology MS Wordfile (docx)

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