POTD: History of the Match

In celebration of everyone who successfully matched today, I wanted to talk about the fascinating history of the Match, from the crazy days of pre-Match chaos and to the unsung heroism of one medical student that changed it all!

In ye olden days...

Back at the turn of the century, residencies were only just in their nascency, and there was no strict requirement of residency in order to practice medicine. Scary thought, considering I didn't know how to order Tylenol let alone practice medicine when I graduated from medical school. In fact, residencies were once called "undergraduate repair shops" in the 1910 Flexner Report (a revolutionary-but-also-definitely-morally-grey-and-racist education reform paper). They became more popular with the rise of medical specialties, where graduates would essentially apprentice until they felt comfortable to practice on their own. However, as more specialties developed, the value of residency rose, and by the 1930s, most hospitals were requiring residency training before completing boards exams.

By the 1940s, competition for residencies grew fierce. Offers were given out increasingly earlier, so much so that they were being extended to students only in their second year of medical school. It got so bad that medical schools were embargoing recommendation letters to prevent the hospital equivalent of cradle-robbing. Soon, competition got so bad that "exploding offers" were being made that had a 12-hour expiration date, leaving many students scrambling to send off telegrams and make phone calls. No bueno STOP

Thus, the first Match system was born.

The Match that never was:

In 1951, the Mullin-Stalnaker algorithm was in works to be implemented in the first ever match process, and it was being championed by the high echelon of medicine including the Dean of Harvard Medical School. Thousands of dollars were being poured into making this event work, and it would be entirely derailed by a maverick medical student named William Hardy Hendren III. A Navy veteran with lots of chutzpah, he noticed the algorithm was flawed in several ways, and even presented his argument on the blackboard with the Dean and entire medical class present.

I won't go into the nitty-gritty of the Mullin-Stalnaker algorithm for sake of brevity, however it's actually super interesting and explained really when in this blog (https://thesheriffofsodium.com/2020/02/03/the-match-part-2-getting-under-the-hood-how-does-the-match-work/). Long story short, this match process penalized students who ranked "reach" programs, and it often produced what we call unstable matches - matches in which more favorable matches existed for both parties and were not considered or passed on. This encourages "elopement" by either party to make deals outside the matching system.

Going back to our story, Mr. Hendren realized this, and despite multiple threats from the Dean about withholding his graduation and that "[the Dean] didn't give a damn if any of [the students] get internships," he persisted in his quest for reform. In the historic frantic following weeks, Hendren led a movement and gathered over half the student leadership of medical schools across the country and created their own algorithm, "The Boston Pool Plan." This new plan assumed a "deferred acceptance" algorithm, in which a student was tentatively assigned to a hospital until or unless they match at a higher ranked place. There was, as suspected, resistance from the powers-that-be, of which Hendren replied:

"If you don't change the plan, it will be the end of it. I have votes from 95% of the students in the country...These same students have said they're going to bolt if you don't change the plan. We're not going to sacrifice our futures because of the errors you all have made in setting up this plan the way that you have."

The leadership deferred to the demands of Hendren and the students, and the following year the Boston Pool Plan was implemented for the first ever match. Hendren went on to become a renown pediatric surgeon, remaining on to serve as emeritus chief of surgery until his death just this past May at the age of 96.


POTD: ECMO

Hello everyone! Let's talk about ECMO. I was first introduced to ECMO in the era of pre-vaccine COVID, where it was often hailed as the Hail Marry of solutions for severe COVID cases in younger patients. But ECMO can be used for so much more, including a recently discussed topic - hypothermia.

What is ECMO?

ECMO, or extracorporeal membrane oxygenation, is a prolonged cardiopulmonary support technique that allows oxygenation of the blood bypassing the heart and lungs. It differs from cardiopulmonary bypass in that it requires less anticoagulation and allows for longer duration of treatment. 

Who qualifies for ECMO?

Criteria for ECMO include acute severe cardiac or pulmonary failure that is potentially reversible and has failed conventional treatment and carries a high risk of death. Conditions include:

  • ARDS and severe respiratory failure (severe hypercapnia pH < 7.20, or P/F ratio < 70)

  • poor gas exchange/obstruction (massive PE)

  • acute pulmonary injury: smoke inhalation, contusion, drowning

  • nonischemic cariogenic shock, cardiac/pulmonary trauma, massive PE

  • bridge to lung or cardiac transplant or LVAD

Who does not qualify for ECMO?

Absolute contraindications include:

  • unwitnessed cardiac arrest

  • non-reversible, progressive lung or cardiac disease that is not a transplant candidate

  • pulmonary hypertension

  • advanced cancer

  • >120 kg

Relative contraindications include:

  • older than 75 years

  • CPR > 60 minutes

  • CNS injury

  • multi organ failure or trauma

What types of ECMO exist?

VV or veno-venous: the most common access, typically central vein IVC access (femoral, IJ), passes through oxygenator, and deposits in a large vein near RA (IJ, subclavian)

  • provides respiratory support but not circulatory support

  • pathologies: COPD, ARDS, PNA, smoke inhalation injury, status asthmatics, airway obstruction, drowning

VA or veno-arterial: can be peripheral or central, access is central vein, passes through oxygenator, and deposits in arterial access around pulmonary artery

  • provides both respiratory and cardiac support

  • pathologies: non-ischemic cardiogenic shock, heart/lung transplant, LVAD failure, PE, sepsis

Complications:

  • clot formation

  • bleeding

  • vessel trauma, LV distension

  • North-south syndrome - hypoxia and cyanosis in cephalic and lower extremities outside of range of circuit access

https://wikem.org/wiki/Extracorporeal_membrane_oxygenation

https://www.emra.org/emresident/article/ecmo-in-the-ed/


POTD: Le Fort Fractures

Hello everyone!

For trauma Tuesday, let's discuss Le Fort fractures.

Le Fort fractures are complex facial fractures involving the maxilla, zygoma, and orbital rims. They were discovered by Dr. Rene Le Fort who discovered these "lines of weakness" in skulls of patients with blunt facial traumas. These fractures by nature include the pterygoid structures of the sphenoid bone, which provide stability and support for the mid face. Most commonly seen in MVC, the velocity determines the severity of the fractures, of which there are three categories:

Le Fort I: "floating palate"

- a transverse fracture of the maxillae above the teeth, leaving the body of the maxilla separated from the pterygoid plate and nasal septum. This leads to a "floating palate", where the maxilla and hard palate may be mobile.

- associated with malocclusion and dental fractures

- generally considered a stable fracture

Le Fort II: "floating maxilla"

- fracture that extends superiorly to include the nasal bridge, maxilla, and orbital rim and floors. fractures are typically bilateral and appear triangular in shape

- The maxilla and nose are mobile, the eyes/orbits are not

- can be stable or unstable

Le Fort III: "floating face"

- the rarest and most severe, this fracture involves the bridge of the nose, medial and lateral orbital wall, zygomatic arch, and maxilla. 

- the entire face is mobile, can present as a "dish face" deformity (essentially the face is caved in)

- this is an unstable fracture

Presentation and Evaluation:

Le Fort fractures can present with many features, including facial deformity and emphysema, CSF rhinorrhea, conjunctival hemorrhage, raccoon eyes, hemotympanum and auricular hematoma, and anosmia

Questions to ask:

Can you smell? Can you bite? 

How is your vision?

Is there numbness or tingling in you face?

Exam:

- palpate for signs of crepitus, areas of tenderness, or instability

- visual acuity test - very important considering high risk of ophthalmologic damage

- check mobility by stabilizing the forehead and grabbing the upper teeth/hard palate, and attempt to move the hard palate

-evaluate to c-spine injuries - approximately 1.4% have concomitant c-spine injuries or dislocations

Management:

- Stabilize ABCs. If airway is at risk - understand that it will be a difficult airway, and consider awake intubation. These patients are particularly difficult as oral injury may prevent appropriate jaw displacement for oral intubation. Nasal intubations are contraindicated due to nasal injuries. These are patients where if a definitive airway is needed, cricothyroidotomy should be considered.

- significant nasal bleeding can occur and may present an airway risk. Consider anterior packing and elevation of head of bed to 40-60 degrees. Posterior packing should be avoided due to risk of skull base injuries.

- IV antibiotics should be given in sinus fractures or CSF leaks, which will be the majority of these fractures

- CT with dedicated facial view should be obtained. 

Disposition:

- All Le Fort fractures should be seen by OMFS

- consider Ophtho or NSG consult if there is concern for eye or brain damage/CSF leak

- some stable Le Fort I and II are stable for discharge with follow up, however most will require ICU (for airway management) or direct OR 

http://www.emdocs.net/em3am-le-fort-fractures/

https://www.ncbi.nlm.nih.gov/books/NBK526060/

https://coreem.net/core/le-fort-fractures/