About Michelle Lin, MD

ALiEM Founder and CEO
Professor and Digital Innovation Lab Director
Department of Emergency Medicine
University of California, San Francisco

Trick of the Trade: Laryngospasm notch maneuver

What is the incidence of laryngospasm in pediatric patients receiving ketamine for procedural sedation in the ED?

Answer = 0.3%

A child with laryngospasm can be a scary thing to manage. There’s no way to predict whether a child is going to get it.

You can try the usual maneuvers including a jaw-thrust, positive pressure ventilation to try to open the vocal cords, and suctioning. If these don’t work, you might consider giving the patient a paralytic, such as succinylcholine, and performing an endotracheal intubation for worsening hypoxia. Before that, what non-invasive maneuver can you try first?

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By Michelle Lin, MD|2016-11-11T19:00:18-08:00Dec 1, 2010|Pediatrics, Tricks of the Trade|

Trick of the Trade: Hemostasis of bleeding finger laceration using a glove

Lacerations of the finger can bleed quite profusely because of digital vascularity. This obscures the provider’s ability to perform a careful exam and can make suturing quite difficult. Simple direct pressure over the laceration often controls the bleeding.

What if this doesn’t work?

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By Michelle Lin, MD|2019-06-13T09:47:17-07:00Nov 24, 2010|Tricks of the Trade|

Paucis Verbis: Identifying toxidromes by vital signs

A middle-age woman presents to the Emergency Department with altered mental status after having ingested a drug. Is it an opioid? Is it an antihistamine?

The key is to pay close attention to the vital signs. They are often the clue to the mystery. I found this great table from EM Clinics of North America by Dr. Timothy Erickson from 2007. I can’t imagine how long it took for him to create all these mnemonics. I’ll never remember these mnemonics, but they’re fun to read nonetheless.

PV Card: Toxidromes by Vital Signs

Go to ALiEM (PV) Cards for more resources.

By Michelle Lin, MD|2021-10-17T09:22:42-07:00Nov 19, 2010|ALiEM Cards, Tox & Medications|

Trick of the Trade: Toe paronychia splinting

Ingrown toenails, or paronychias, are usually exquisitely painful and a bit gnarly when they present to you in the Emergency Department. Dr. Stella Yiu described toenail splinting techniques using steristrips or dental floss. The purpose of splinting is to prevent the toenail from growing back into the lateral nail fold.

This assumes a relatively mild-to-moderate case. Often simple elevation of the nail out of the lateral nail fold (under digital block anesthesia) is all that is needed to treat a paronychia. Pus is often released with this maneuver.

What do you do for more severe cases when you have to excise the lateral edge of the nail?

There’s no toenail to slide the steristrip/ cotton/ dental floss material under.

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By Michelle Lin, MD|2019-01-28T23:16:45-08:00Nov 17, 2010|Tricks of the Trade|

Which is the best answer?

A. Yes
B. No
C. Maybe
D. 2 of the 3 above
E. None of the above

Wait, what?!

What a terribly written test question!

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By Michelle Lin, MD|2019-01-28T23:17:06-08:00Nov 15, 2010|Education Articles, Medical Education|

Trick of the Trade: Ultrasound-guided supraclavicular central line

Emergency physicians are procedural experts in central venous access. The subclavian vein is the best site for such access, because it has been shown to have the lowest rate of iatrogenic infections and deep venous clots

Bedside ultrasonography has really revolutionized how we obtain vascular access over the past 10 years. Identifying the subclavian vein using ultrasonography, however, is still technically challenging. The vein is located just posterior to the clavicle, which often gets in the way of the linear transducer.

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By Michelle Lin, MD|2016-11-11T19:00:20-08:00Nov 10, 2010|Tricks of the Trade, Ultrasound|

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