Author Archives: James Heaton

Wound prophylaxis – Should lip lacs get antibiotics (and few others)?

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During my review for 72 hour returns we had a through and through lip laceration come in that returned with a wound infection a few days later.  This prompted me to look up current recommendations as I’m pretty sure that I haven’t been giving antibiotic prophylaxis for this.

Searching literature, Tintinalli and UpToDate…… Most superficial wounds do not require prophylaxis, however, through and through lip lacerations were an area of uncertainty and debate….

Tintinalli  – “matter of provider preference.”

UptoDate – no clear clinical evidence to say that these wounds should receive antibiotic prophylaxis , however, due to the pathogens of the oral cavity, they recommend prophylaxis.

Current literature – Review article in 2008, Annals of Emergency Medicine, Mark DG et al – review of studies do not show a statistically significant benefit; however, the only double-blinded randomized control trial showed a trend toward benefit in patient’s that were compliant with therapy.

Some other stats – Rate of infection in wound treated in the ED (Tintinalli)

Head and neck 1-2%

Upper extremity 4%

Lower extremity 7%

Oral wounds – 9-27%

If giving prophylaxis then Pen VK or Clindamycin is recommended for 3-5 days.

For other oral wounds, <1cm, no need to close. Close if large gap susceptible to food getting trapped, and counsel on good oral hygiene.  Dental and OMFS usually recommend d/c with chlorhexidine gluconate oral rinse (0.12%) (Peridex) and will have patients swish and spit after meals to keep the wound from contamination with food particles.

My take away from this is strongly consider antibiotic prophylaxis with through and through oral wounds as they are higher risk for infection with oral flora; however, not an absolute must based on the current evidence.  Be sure to emphasize good oral hygiene, and as always, close follow up with good return precautions.

Other wounds to strongly consider prophylaxis due to increased risk for infection are mammalian and human bite wounds, crush injury, puncture wounds, and wounds with either fresh or salt water contamination, or patients who are immunocompromised, asplenic, advanced liver disease, associated edema (according to the IDSA).

Open fractures and wounds with joint capsule violation should receive antibiotic prophylaxis.

Reminder: Update Tetanus and simple lacerations do not need antibiotic prophylaxis.

SIH – Spontaenous Intracranial Hypotension

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Recent EMRAP podcast reminded me of a case from when I was a Medical Officer in the Navy.

One of my Marines, early twenties, with no medical problems presented for follow up in sick call after being seen in the emergency department for a headache.  Since it was the worst headache of his life, an LP was performed.  Both the LP and the CT head were negative. He was given standard headache treatment with “migraine cocktail” from what I remember, however, no significant relief.

He presented to clinic with complaint of ongoing headache that was only better if he laid completely flat with excruciating pain with sitting up.   He refused to do anything other than lay on the gurney in the treatment room.

His presentation was classic for post LP headache, however, he states that this was the same headache that he presented to the ED for the previous evening and was not changed by the LP.  He was adamant about this timeline and unchanging symptoms after LP. Physical exam was normal to include normal Neuro exam.

I subsequently called the Neurologist on call at Naval Hospital, who stated the likely diagnosis was a “spontaneous CSF leak” and recommended a blood patch.  I was quite confused as I had never heard of such and it seemed like a made up diagnosis to me at the time.   I did, however,  want to help my patient and for him to leave the clinic at some point that day.  I then called anesthesia who was agreeable to the blood patch given recent LP and current exam/symptoms.   The patch lead to resolution of his symptoms and he was able to stand up and walk without a headache.

This is the only case that I have seen, however, the recent EMRAP review leads me to believe that I might see another case while practicing Emergency Medicine.

SIH is caused by a spontaneous tear in the dura in the spine or elsewhere in the meninges and leads to intracranial hypotension from CSF leak.  Symptoms are incredibly similar to post LP headache given the pathophysiology on really differ in that CSF leak in an LP is iatrogenic and SIH is well, spontaneous.  Diagnosis can be by LP, which will demonstrate low opening pressure, or MRI of the Brain W/WO and Spine W/O which will demonstrate the leak.  The symptoms are similar regardless of the level at which the leak occurs so you may have scan the entire meninges to find it.

Treatment initially is caffeine and rest for mild-moderate headaches and lumbar blood patch for moderate-severe headaches.

Uptodate has a lengthy but throughouh algorithm for diagnosis and treatment.   If lumbar patch doesn’t work, a more targeted approach may need to be employed.

  • Take-home point – consider SIH when someone presents with post LP headache symptoms without having had one performed in the recent past.

Phrenic Nerve Paralysis after intrascalene nerve block

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This was covered in the opening of the February EMRAP however not something that I was at all familiar with.  Here are the basics and something that is probably rare but worth knowing about:

 In the episode they presented a case of  70 year old female that was brought in with a complaint of shortness of breath. RR = 28 and SA02 – 88%. The patient presented three hours after a right shoulder arthroscopy.  

ECG : normal

CXR: elevation of the right hemidiaphragm

 Dx:  paralysis of right hemidiaphram after intrascalene nerve block

There are two major complications associated with intrascalene nerve blocks: 1. pneumothorax

2. unilateral phrenic nerve paralysis.

The patient likely had a transient phrenic nerve dysfunction causing unilateral diaphragmatic paralysis.  Younger patients can compensate, older patients with co-morbid conditions may not be able to tolerate this as only one lung is effectively ventilating.

The patient in this case was managed with supplemental 02 until the buvipicane wore off.  Some patients with underlying lung disease and this complication may require BiPAP/CPAP or intubation.  

Things that I took away:

  •  be aware of this procedure and this complication
  • this may be done for patients with same days surgeries to the upper extremity and this is important history to have from Pt or family.
  • It may be missed prior to d/c.  This was an example of one that was missed by Anesthesia prior to d/c of the patient. 
  • May look clinically like PE (tachypnea, tachycardia, post-op patient), however,  history will help make the dx as well as CXR.

 

A little more about the block:

Interscalene nerve block is typically performed to provide analgesia for upper extremity surgeries and may or may not be combined with mild general anesthesia.

 Example of Surgeries this may be used for:

-Shoulder surgery, such as rotator cuff repair, acromioplasty, hemiarthroplasty, and total shoulder replacement

– Humerus fracture