All posts by TheTraumaPro

Deer Hunting and Tree Stand Injuries

Deer hunting season is upon us again, so it’s time to plan to do it safely. Although many people think that hunting injuries are mostly accidental gunshot wounds, that is not the case. The most common hunting injury in deer season is a fall from a tree stand.

Tree stands typically allow a hunter to perch 10 to 30 feet above the ground and wait for game to wander by. They are more frequently used in the South and Midwest, usually for deer hunting. A recent study by the Ohio State University Medical Center looked at hunting related injury patterns at two trauma centers.

Half of the patients with hunting-related injuries fell, and 92% of these were tree stand falls. Only 29% were gunshots. And unfortunately, alcohol increases the fall risk, so drink responsibly!

Most newer commercial tree stands are equipped with a safety harness. The problem is that many hunters do not use it. And don’t look for comparative statistics anytime soon. There are no national reporting standards. No matter how experienced you are, always clip in to avoid a nasty fall!

The image on the left is a commercial tree stand. The image on the right is a do-it-yourself tree stand (not recommended). Remember: gravity always wins!

Commercial tree stand Do-it-yourself tree stand

Management of CSF Otorrhea/Rhinorrhea

The management of CSF leaks after trauma remains somewhat controversial. The literature is sparse, and generally consists of observational studies. However, some general guidelines are supported by large numbers of retrospectively reviewed patients.

  • Ensure that the patient actually has a CSF leak. In most patients, this is obvious because they have clear fluid leaking from ear or nose that was not present preinjury. Here are the options when the diagnosis is less obvious (i.e. serosanguinous drainage):
    • The “halo” or “double ring sign" is a form of pillow chromatography. The blood components separate from the CSF as they move through the pillow fabric, creating a clear ring or halo surrounding a bloody spot. This is the cheapest, fastest test and is actually fairly reliable.
    • High resolution images of the temporal bones and skull base. If an obvious breach is noted, especially if fluid is seen in the adjacent sinuses, then a CSF leak is extremely likely. This test does not usually change management.
    • Glucose testing. CSF glucose is low compared to serum glucose. Cheap but hard to obtain a decent specimen.
    • Beta 2 transferrin assay. This marker is very specific to CSF. However, the test is expensive and results may take several days to a few weeks. Pricey, and most leaks will have closed before the results are available, making this a poor test.
  • Place the patient at bed rest with the head elevated. The basic concept is to decrease intracranial pressure, which in turn should decrease the rate of leakage. This same technique is used for management of mild ICP increases after head injury.
  • Consider prophylactic antibiotics carefully. The clinician must balance the likelihood of meningitis with the possibility of selecting resistant bacteria. If the likelihood of contamination is low and the patient is immunocompetent, antibiotics may not be needed.
  • Ear drops are probably not necessary. They may confuse the picture when gauging resolution of the CSF leak.
  • Wait. Most tramatic leaks will close spontaneously within 7-10 days. If it does not, a neurosurgeon or ENT surgeon should be consulted to consider surgical closure.

References:

  1. Brodie HA, Thompson TC. Management of complications from 820 temporal bone fractures. Am J Otol, 1997;18:188-197.
  2. Brodie HA. Prophylactic antibiotics for posttraumatic cerebrospinal fluid fistulas. Arch Otolaryngol Head, Neck Surg. 123:749-752.

Percutaneous Tracheostomy Without The Bronchoscope

It’s always nice to find an article that supports your biases. I’ve been doing percutaneous tracheostomy since the 1990’s, and have used a variety of kits and equipment. Some of these turned out to be rather barbaric, but the technique is now quite refined. 

A routine part of the procedure involved passing a bronchoscope during the procedure to ensure that the initial needle was placed at the proper level and in the tracheal midline. It was also rather frightening to watch the trachea collapse when the dilators were inserted.

I abandoned using the bronchoscope in this procedure about 10 years ago. It was an annoyance to get the bronchoscope cart and a respiratory therapist to help run it. And to find someone available to pass the scope while I did the trach. So I added a little extra dissection to the technique, directly visualizing the trachea at the desired location. From then on, I had no need to see the puncture from the inside because I could see it quite well from the outside!

An article in the Journal of Trauma shows that this technique works just as well without the scope. The authors looked at their own series of 243 procedures; 32% were done with the bronchoscope, 68% without. There were 16 complications overall, and the distribution between the bronch and no-bronch groups was equal.

Bottom line: In general, the bronchoscope is not needed in most percutaneous tracheostomy procedures. It adds complexity and expense. However, there are select cases where it can be helpful. Consider using it in patients in a Halo cervical immobilizer, the obese, or in patients with known difficult airway anatomy. And always do the more difficult ones in the OR, not the ICU.

Reference: Percutaneous tracheostomy: to bronch or not to bronch – that is the question. J Trauma 71(6):1553-1556, 2011.