#HurricaneHelene damaged the factory responsible for manufacturing over 60% of all IV fluids used in the US, leading to a major national shortage.

As clinicians what can we do to about the #IVFluidShortage and how can we prevent this crisis from happening again?

A thread 🧵
1/
There are many things we can do as clinicians to improve ICU care & reduce IVF use.

1️⃣Don't order Maintenance IV Fluid!
Almost no patient actually needs continuous IV fluids.
Most either need resuscitation (e.g. boluses) or can take fluid other ways (PO, feeding tube, TPN).
2/

New favorite physiology paper: Central Venous Pressure in Space.

So much space & cardio physiology to unpack here including:
- effects of posture, 3g shuttle launch, & microgravity on CVP
- change in the relationship between filling pressure (CVP) & LV size
- Guyton curves!
1/



To measure CVP in space they needed two things:
📼 an instrument/recorder that could accurately measure pressure despite g-force, vibration, & changes in pressure. They built & tested one!
🧑‍🚀👩‍🚀👨‍🚀 an astronaut willing to fly into space with a central line! 3 volunteered!
2/

The media silence on this is deafening.

Did he have a head CT? What did it show?
Did he have stitches? Tetanus shot?

The NYT ran nonstop stories about Biden’s health after the debate but can’t be bothered to report on the health of someone who was literally shot in the head?

https://twitter.com/matt4va/status/1813202802337779731

To the people in the replies who say it’s impossible because of “HIPPA”
1. I assume you mean HIPAA
2. A normal presidential candidate would allow his doctors to release the info. This is exactly what happened when Reagan survived an assassination attempt.
washingtonpost.com/obituaries/202…

You've probably heard "don't give lactated ringers because it raises lactate"

This statement is ~98% false, but there's one crucial practice-changing fact that you need to know.

A 🧵 all about lactic acid and lactated ringers!
1/

First off, we should ackowledge the obvious: Lactated ringers does in fact contain lactate... 28 mEq/L in fact

BUT there's one little detail to remember:
Lactate ≠ Lactic acid

When we measure "lactate" we care about the ACID (H+) which lowers pH & causes organ dysfunction
2/

If you intubate you need to read the #PREOXI trial!
-n=1301 people requiring intubation in ED/ ICU were randomized to preoxygenation with oxygen mask vs non-invasive ventilation (NIV)
-NIV HALVED the risk of hypoxemia: 9 vs 18%
-NIV reduced mortality: 0.2% vs 1.1%

#CCR24
🧵
1/



Hypoxemia (SpO2 <85%) occurs in 10-20% of ED & ICU intubations.

1-2% of intubations performed in ED/ICU result in cardiac arrest!

This is an exceptionally dangerous procedure and preoxygenation is essential to keep patients safe.

But what’s the *BEST* way to preoxygenate?
2/

Results from #PROTECTION presented #CCR24 & published @NEJM.
- DB RCT of amino acid infusion vs placebo in n=3511 people undergoing cardiac surgery w/ bypass.
- Reduced incidence of AKI (26.9% vs 31.7% NNT=20) & need for RRT (1.4% vs 1.9% NNT=200)

Potential game changer!

🧵
1/

I work in a busy CVICU & I often see AKI following cardiac surgery.

Despite risk stratification & hemodynamic optimization, AKI remains one of the most common complications after cardiac surgery with bypass.

Even a modest reduction in AKI/CRRT would be great for my patients.
2/

A slightly tricky blood gas case:

77 yo with respiratory distress, RR 30, SpO2 80% on non-rebreather at 15 lpm

CXR & TTE are unrevealing

pH 7.58 / PaCO2 24 / PaO2 >500 / HCO3 22

MetHb 0% CarboxyHb 0%

The ABG looks like this: The answer is sulfhemoglobinemia.

Sulfhemoglobinemia is a *permanently* modified hemoglobin associated with exposure to TMP/SMX, dapsone, phenazopyridine, & other amino & nitro compounds.

It has an altered oxy-hemoglobin dissociation curve.

2/

This story is absolutely shocking.

Philip Morris International (PMI) spent millions to influence medical education by buying a series of “CMEs” at Medscape!

How else has big tobacco tried to normalize vaping & influence the medical community?

🧵
1/
theexamination.org/articles/medsc… Recently it was revealed that Philip Morris International (PMI) had SPONSORED CME materials about smokeless tobacco products on Medscape.

I had the opportunity to review these “CME” materials & they are pretty shocking!
2/

Damn. Under Trump the White House Medical Unit was a pill-mill. Thousands of ambien & provigil per month.

Worse, for a clinic that doesn’t typically do procedures w/ moderate sedation they sure are they ordering prodigious quantities of morphine, fentanyl, versed, & ketamine…? Honestly, this reminds me of Norman Ohler’s Blitzed.

It’s October - hockey season - so let’s talk about a hockey/pulmonary case:

A previously healthy 17yo presents with dyspnea, frothy sputum, & orthopnea that began after playing hockey.

In the ED he is tachycardic, tachypneic, mildly hypoxic. He has crackles bilaterally.

Dx?
1/ Before we get to the diagnosis, Inhalation of which of the following could explain his symptoms?

2/

Lots of inane comments from Elon/Rohan bros that vaccines don’t prevent disease.

Let’s debunk these claims:
1. Polio - vaccine introduced 1957
ourworldindata.org/grapher/report…

2. Measles - vaccine introduced 1963
ourworldindata.org/grapher/measle… 3. Tetanus - vaccine 1938
cdc.gov/vaccines/pubs/…

4. Diphtheria
researchgate.net/publication/32…

The long awaited #COVIDOUT RCT is now in @TheLancet:
- high risk adults randomized to either metformin (MET), ivermectin (IVM), fluvoxamine (FLV) or placebo.
- MET reduced the risk of long COVID (6.3% vs 10.4%; NNT = 24)
- no benefit with IVM or FLV

thelancet.com/journals/lanin…
1/ COVID-OUT was a large blinded multicenter RCT looking at repurposed oral meds.

The primary outcome was severe COVID; this was one of the *MANY* negative RCTs of ivermectin. (See 🧵👇)

The current study is a planned secondary analysis, looking at the incidence of long COVID.
2/

https://twitter.com/nickmmark/status/1560272414323249152

Pulmonary teaching case: you are called to the bedside of a 60yo man who was admitted for pneumonia a week ago. You were called because “he coughed and now his chest is PULSATING!”

This is what you see at the site of a previously removed chest drain:

What’s the diagnosis?
1/ twitter.com/i/web/status/1… This is Empyema necessitans (EN):

EN is a rare complication of an infected pleural effusion where purulent fluid “escapes” the pleura and erodes into the chest wall, causing an extrapleural fluid collection that communicates with the pleural space.

From @Radiopaedia:
2/ twitter.com/i/web/status/1…

Interesting RCT in @NEJM about platelet transfusions prior to CVC placement in people w/ thrombocytopenia (Plt 10-50k):
- higher rate of grade 2-4 bleeding w/o Plt transfusion: 11.9% vs 4.9%
- difference driven by much more bleeding w/ subclavian lines
nejm.org/doi/full/10.10…
1/ This trial enrolled n=338 hospitalized people in 🇳🇱 with platelets between 10-50k, INR <1.5 (changed to 3.0). 57% were heme/onc patients & 43% were ICU patients.

Median Plt count was 30k

Most were getting a CVC for chemoTx. (Most weren’t exactly your “typical” ICU patient.)
2/

ATS’ Leadership are in a Kobiyashi Maru situation with #ConferenceGate
- one one hand, they signed a terrible contract and stand to lose a ton of money if they pull out of Orlando
- the other hand, they risk having no one show up & alienating most of their members
#ATSSafe4All
1/ People are angry. Seeing how many green ribbons there are at ATS, it’s dawning on ATS’ leadership that they screwed up big time.

They wonder: Will these people boycott Orlando 3 times in the next decade? Will they keep paying dues? Is this an existential threat to the org?
2/

https://twitter.com/khibbert_md/status/1661365076178206720

You've probably heard that Bicarbonate has to turn into CO2 to raise the pH. “Don’t give bicarb if you can’t increase ventilation.”

But how much CO2 is there in an amp of sodium bicarbonate?

A bicarb 🧵
1/ Sodium bicarbonate raises the pH by binding H+ ions and turning into CO2 and water.

For my fellow 🧪 nerds, I’ll write:

HCO3 (aq) + H+ (aq) --> CO2 (g) + H2O (l)

2/

Real shitty explanation by @atscommunity about where they plan to hold future conferences.

TL/DR: On one hand they had to consider safety & inclusion, on the other hand ATS’ sterling “reputation in the meetings industry.” They prioritized the latter.

news.thoracic.org/community/pres… I’m disappointed that they have prioritized profit over the concerns of members.

Frankly, I would have been willing to pay higher dues, higher conference fees, legal fees, etc if the financial concerns had been raised transparently.

Instead they decided unilaterally.
2/

Here’s a fun medical puzzle: what does this antidote (Sugammadex) have in common with this cleaning product (Febreze)?

1/ The answer is the chemical structures for both are cyclodextrins!

2/
Sugammadex Febreze

This is an important & thought provoking meta-analysis about the potential harms of propofol.

I think this should (& almost certainly will) inspire important future studies.

But it won’t change my practice in the ICU quite yet. Here’s a 🧵 about why.
1/

https://twitter.com/SRAnesthesiaICU/status/1646227897596641313

First, this finding was driven by OR mortality, particularly in cardiac surgery patients.

ICU mortality was non-significant. (p=0.5). Additionally this is an unadjusted p-value, so if we correct for multiple comparisons it’s even more insignificant.

2/

Much has been made of the declining life expectancy in the US.

The reality is regional. Think of the US as two countries:

Some blue counties with increasing life-expectancy better than 🇯🇵 (84) & many red counties with plummeting life expectancy worse than 🇷🇺 (71).
1/ Compare the narrow variation between prefectures in Japan (range 82-84) with the wide variation among US states (range 71-81).

🇺🇸 cdc.gov/nchs/pressroom…

🇯🇵 en.wikipedia.org/wiki/List_of_J…

2/

The usual anti-vax suspects are talking about a paper “proving masks raise CO2 to harmful levels.”

Well I read it and it’s a bunch of non clinical wackos who used the wrong equipment to accidentally measure end tidal CO2.

A debunking 🧵

1/ Before we get to the paper with it’s very flawed methods & conclusions, let’s talk about the authors.
2/