All posts by TheTraumaPro

What The Heck? Part 2

Thanks to all who tweeted, commented and emailed their suggestions! The case involves a partially ejected patient who is brought to the ED with respiratory distress and diminished lung sounds on the left. 

Sounds easy, right? But remember, this is the Trauma Professional’s Blog! I want you to be prepared for things that are a little outside the ordinary. No zebras here, but stuff you could actually see.

First, every trauma activation patient gets supplemental oxygen as the festivities continue. You need to quickly figure out if this is an airway, breathing, or circulation problem. Yes, circulation. Major torso vascular injuries and tamponade can cause respiratory distress. However, we would not expect the blood pressure to be anywhere near normal.

So check the airway to make sure there is no foreign material there. Check the trachea for position. This is one of those classic test results in medicine: if the trachea is deviated, they most likely have a tension pneumothorax. But if it’s not, that doesn’t necessarily mean they don’t. In this case, the trachea is in its usual place, but don’t count tension physiology out yet.

Double check the breath sounds. You confirm that they are nearly absent on the left. What to do next?

You must presume some major problem on the left: large hemo- or pneumothorax, or a tension pneumothorax. Since your patient is physiologically abnormal, you cannot wait to get a chest x-ray. You have to deal with the breathing problem right away. The correct answer is to needle the left chest, then follow immediately with a chest tube.

You do so, and both procedures go smoothly. The chest tube fogs with exhalation, and there is a small amount of blood (100cc) that drains into the collection system. But your patient does not look or feel any better! Oxygen saturations are still in the low 80′s, and he remains dyspneic. As you were finishing the chest tube, the radiology tech snapped a quick chest x-ray, and the result will be up in two minutes.

Now what? Your choices are:

  • Intubate
  • Insert another chest tube
  • Package the patient and run to the OR
  • Wait for the chest x-ray

Again, tweet, comment or email. What is wrong, and why didn’t the chest tube work? What is the ideal next move? Answer tomorrow.

What The Heck? The original presentation

What The Heck? Pop Quiz

You are working in your local emergency department and are notified of an incoming trauma patient. The victim was involved in a car crash at highway speeds, was not restrained, and was partially ejected from the driver’s side window.

Pre-arrival report from the medics indicate that he has a BP of 146/90, pulse of 130, and a respiratory rate of 36. He is very dyspneic and complains that he can’t breathe. They state that the only abnormality that they found on their exam was some bony crepitus over the left lateral chest.

When he arrives, he is exactly as billed. O2 saturations are 82%, and he is in obvious respiratory distress. Breath sounds are quite diminished on the left.

What are the potential diagnoses?

What do you do next? Here are your choices:

  • Examine the airway
  • Apply supplemental oxygen
  • Intubate
  • Obtain a chest x-ray
  • Decompress the left chest with a needle
  • Insert a chest tube
  • Proceed to the operating room
  • Obtain a CT scan of the torso

Please tweet or leave comments with your suggestions. I’ll review your choices on Monday, and provide some followup information. Final answer on Tuesday!

Managing Penetrating Injuries: Some Practical Tips

Although penetrating injuries are a relatively uncommon mechanism at most trauma centers, they are more likely than not to injure deeper structures. Key decisions need to be made quickly during the initial evaluation in order to provide the best care.

Here are some practical tips:

  • Penetrating injuries to just about anything but the extremities should activate your trauma team.
  • If your patient is hypotensive, they will need to go to the OR. You can certainly start infusing some fluid or blood, but a lot leaked out before they got to you, indicating that the leak needs to be surgically fixed. No exceptions.
  • All hypotensive patients require activation of your massive transfusion protocol and consideration of giving tranexamic acid (TXA).
  • If your patient is normotensive, you have the luxury of evaluating them more thoroughly. But don’t lose your sense of urgency. Assume they are dying until you prove otherwise.
  • Complete your secondary survey. Don’t skimp on the exam and always look at the back. If your patient ends up on an OR table, it may be the only time you get to look at it for quite some time.
  • Get a single x-ray of the affected area, even if you need to go to the OR quickly. This can help plan your operation, and may drive you to explore areas you had not considered.
  • Before shooting the x-ray, mark any and all entry and exit points. This will help to predict the trajectory and any injured structures.
  • Use small markers, but not too small. Most radiology departments have small arrows, which are ideal. Dots are too small and may not show up well on plain images. But be aware that some markers may be too dense for CT, causing artifacts that may obscure pathology.
  • Watch out for your own safety! Somebody was trying to kill your patient, and they may show up at your hospital to try to finish the job. Make sure your ED and inpatient areas take appropriate security precautions.

CT Cystography For Bladder Trauma

Bladder injury after blunt trauma is relatively uncommon, but needs to be identified promptly. Nearly every patient (97%+) with a bladder injury will have hematuria that is visible to the naked eye. This should prompt the trauma professional to obtain a CT of the abdomen/pelvis and a CT cystogram.

The CT of the abdomen and pelvis will identify any renal or ureteral (extremely rare!) source for the hematuria. The CT cystogram will demonstrate a bladder injury, but only if done properly!

During most trauma CT scanning of the abdomen and pelvis, the bladder is allowed to passively fill, either by having no urinary catheter and having the patient hold it, or by clamping the catheter if it is present. Unfortunately, this does not provide enough pressure to demonstrate small intraperitoneal bladder injuries and most extraperitoneal injuries.

The proper technique involves infusing contrast into the bladder through a urinary catheter. At least 350cc of dilute contrast solution must be instilled for proper distension and accurate diagnosis. This can be done prior to the abdominal scan. Once the initial scan has been obtained, the bladder must be emptied and a focused scan of just the bladder should be performed (post-void images). Several papers have shown that this technique is as accurate as conventional retrograde cystography, with 100% sensitivity and specificity for intraperitoneal ruptures. The sensitivity for extraperitoneal injury was slightly less at 93%.

Bottom line: Gross hematuria equals CT of the abdomen/pelvis and a proper CT cystogram, as described above. Don’t try to cheat and passively fill the bladder. You will miss about half of these injuries!

Related posts:

Reference: CT cystography with multiplanar reformation for suspected bladder rupture: experience in 234 cases. Am J Roentgenol 187(5):1296-302, 2006.

Intraperitoneal bladder rupture

Extraperitoneal bladder injury

Crowdfunding: The Future Of Research Funding?

Many readers are familiar with the concept of “crowdsourcing”, or tapping into a pool of people connected via the internet to obtain something of value. This something might be information, services (think Uber), or content (99designs). And with the advent of websites like KickStarter, it is now possible to crowdsource money.

As anyone who has an academic focus can attest, there is tremendous pressure to pursue (hopefully) meaningful research. In many cases, this is an integral part of keeping one’s job. But research is expensive. Even the simplest retrospective study requires some kind of statistical analysis, and statisticians don’t work for free. And in more sophisticated research labs, there are huge personnel, equipment, as well as other infrastructure costs. 

Traditionally, researchers have pursued grant dollars from single sources like the federal government, local agencies, corporations, and charitable organizations. But this is very competitive, and it’s usually an all or none proposition. Only one of many applications gets all the cash, and the rest get none.

But now, crowdsourcing has moved beyond the technology and design type projects seen on KickStarter to what is now called crowdfunding. There are a number of sites that solicit small donations from individuals, pooling them together into large amounts. The largest campaign on KickStarter was able to amass over $20 million to create a new version of the Pebble watch. A small campaign to get $10 to develop a potato salad recipe ended up collecting over $55 thousand.

Bottom line: The concept of crowdfunding has now made the jump to funding research. There are a number of sites that are structured similarly to KickStarter that allow researchers to solicit donations from the public. Some are relatively rudimentary, and some are naive in their approach to soliciting funds. In order to engage the public to contribute sums of money, large or small, research teams will need to explain their ideas simply and describe some practical or potential application. And it won’t hurt to offer some type of schwag for donors at various financial levels.

A few interesting crowdfunding sites: