Worthwhile Reading and Viewing

It’s been a while since I posted a link collection, so here are quite a few…

The highest-resolution snowflake photos ever captured.  

The real kind of snowflakes, not the metaphorical kind.

Stella’s best leaf jumps of all time.

A lot of enthusiasm

Spot, the Robot Dog, goes to work on an oil rig.

Bet Spot can’t do what Stella can do.

The recent discussion of port congestion reminded me of this very interesting website, which shows the world’s maritime traffic in real time or very close to same.

And on a more somber note:  November 10 marked the 45th anniversary of the Great Lakes ore carrier Edmund Fitzgerald, an event memorialized in song by Gordon Lightfoot.

Still on the subject of transportation: the implementation of Positive Traffic Control for US railroads, which has been a huge and complex project, is almost complete.

I’m not sure that this mandate really represented the best possible safety-return-on-investment for the money expended.

Turkish trash collectors built a library for abandoned books.

Visiting cards and actual visits, as a Facebook equivalent in 1800s Russia.

Reminds me of a passage in one of Fielding’s novels, in which a woman takes great pleasure in going through the visiting cards of people who called on her, which made me immediately think of like-collecting of Facebook.

 

 

 

 

Consistent Group Membership for Epidemic Control

This paper argues that having a mutually-consistent and reasonably small network of contacts can help in controlling coronavirus spread…for example, if a group of 7 people work together and also socialize together, they are better-off from a potential infection standpoint than if individuals in the group are socializing with different, and frequently changing, sets of people.

Somewhat related:  the Federal Aviation Administration is taking steps to limit the spread of coronavirus in air traffic control facilities:

Each air traffic control facility is establishing separate teams of controllers that will stay together throughout the duty week. Each crew will contain the same employees, limiting the possibility of cross-exposure to COVID-19 that would come through normal shift rotations. If a person on one team gets sick, the only people who would be exposed are the other people on that team.

So, presumably, if one member of a team gets sick, all the team members would go home until they can get tested and found coronavirus free, and a new team will be swapped in to support operational needs. Not sure how large these teams are: in a control tower for a medium-sized airport, a team might consist of all the people working on a particular shift, but for a large facility like Potomac Approach or Kansas City Center, I imagine that the teams must comprise only subsets of the total workforce; probably people who work in close proximity to one another.

Texas Aggie Doctor Reports — Clinical Pearls Covid 19 for ER practitioners

The following information is from a front line ER doctor using the handle of ‘nawlinsag’ on a Texas Aggie web site.   I’ve included the link below.  I’ve also included the complete text of his post in full in hopes medical professionals and lay people could get the most benefit from his observations of the course of COVID-19 in a small front line Louisiana hospital.

Short form: This is not the flu.   It is a horror show of death and disablement that is crowding out all other medical care including an immediate downgrade of life saving cardiac care.   Only on in seven people put on ventalators in this hospital is surviving, and then only after 10-t0-12 days of ventalator support.

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https://texags.com/forums/84/topics/3102444?fbclid=IwAR3s13SRnw7YNgtu-7LZyrMUSMIRRWScU67lwbuwZM8fna-6R8k4tqrtO3w

I just spent an hour typing a long post that erased when I went to change the title so I apologize to the grammar and spelling police. This one will not be proofread and much shorter.

I am an ER MD in New Orleans. Class of 98. Every one of my colleagues have now seen several hundred Covid 19 patients and this is what I think I know.

Clinical course  is predictable.
2-11 days after exposure (day 5 on average) flu like symptoms start. Common are fever, headache, dry cough, myalgias(back pain), nausea without vomiting, abdominal discomfort with some diarrhea, loss of smell, anorexia, fatigue.

Day 5 of symptoms- increased SOB, and bilateral viral pneumonia from direct viral damage to lung parenchyma.

Day 10- Cytokine storm leading to acute ARDS and multiorgan failure. You can literally watch it happen in a matter of hours.

81% mild symptoms, 14% severe symptoms requiring hospitalization, 5% critical.

Patient presentation is varied. Patients are coming in hypoxic (even 75%) without dyspnea. I have seen Covid patients present with encephalopathy, renal failure from dehydration, DKA. I have seen the bilateral interstitial pneumonia on the xray of the asymptomatic shoulder dislocation or on the CT’s of the (respiratory) asymptomatic polytrauma patient. Essentially if they are in my ER, they have it. Seen three positive flu swabs in 2 weeks and all three had Covid 19 as well. Somehow this ***** has told all other disease processes to get out of town.

China reported 15% cardiac involvement. I have seen covid 19 patients present with myocarditis, pericarditis, new onset CHF and new onset atrial fibrillation. I still order a troponin, but no cardiologist will treat no matter what the number in a suspected Covid 19 patient. Even our non covid 19 STEMIs at all of our facilities are getting TPA in the ED and rescue PCI at 60 minutes only if TPA fails.

Diagnostic
CXR- bilateral interstitial pneumonia (anecdotally starts most often in the RLL so bilateral on CXR is not required). The hypoxia does not correlate with the CXR findings. Their lungs do not sound bad. Keep your stethoscope in your pocket and evaluate with your eyes and pulse ox.

Labs- WBC low, Lymphocytes low, platelets lower then their normal, Procalcitonin normal in 95%
CRP and Ferritin elevated most often. CPK, D-Dimer, LDH, Alk Phos/AST/ALT commonly elevated.
Notice D-Dimer- I would be very careful about CT PE these patients for their hypoxia. The patients receiving IV contrast are going into renal failure and on the vent sooner.

Basically, if you have a bilateral pneumonia with normal to low WBC, lymphopenia, normal procalcitonin, elevated CRP and ferritin- you have covid-19 and do not need a nasal swab to tell you that.

A ratio of absolute neutrophil count to absolute lymphocyte count greater than 3.5 may be the highest predictor of poor outcome. the UK is automatically intubating these patients for expected outcomes regardless of their clinical presentation.

An elevated Interleukin-6 (IL6) is an indicator of their cytokine storm. If this is elevated watch these patients closely with both eyes.

Other factors that appear to be predictive of poor outcomes are thrombocytopenia and LFTs 5x upper limit of normal.

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How to Think About 2019-nCov

In the wake of Ebola, NVD-68, and Zika, we should have all learned our lesson by now. We haven’t. This is 2020—Iowans took a week to count the votes of 5% of their population, and an elderly white Northeastern president is principally opposed by a gaggle of downright ancient white Northeasterners. There aren’t any quick fixes for emergent idiocies like those, but a few simple heuristics will go a long way toward avoiding panic over coronavirus.

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