Ron Barbosa MD FACS Profile picture
Feb 18, 2024 13 tweets 6 min read Read on X
🧵regarding the 117 deaths in The Iliad where Homer provided details about the mechanism of injury:

Here we will run an M&M conference to consider whether these deaths might have been preventable if the Achaeans and Trojans had modern Level 1 trauma centers at the time.
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Background:
Recently, I read 'The Iliad' and noticed how often Homer described deaths with anatomic detail.

I then decided to look at these cases as though they occurred near a modern Level 1 trauma center with full capabilities.

Butler's 1898 English translation was used. Image
Methods:

Assumptions and simplifications included:

- The Achaeans and Trojans each have their own trauma centers

- rapid 'scoop and run' prehospital transport

- the cases present individually, and there are no 'mass casualty' scenarios that would overwhelm the system. Image
Head injuries in The Iliad appeared to be the most lethal.

22 head injuries were non-preventable. These included both blunt and penetrating mechanisms, with 7 beheadings.

3 blunt head injuries were 'possibly' preventable. The utility of ICP monitors was unknown 🤔. Image
Neck injuries were common, and were as follows:
9 - nonpreventable
3 - possibly preventable
4 - preventable

Face injuries occurred in a few cases:
4 were possibly preventable and 2 were preventable.

Airway interventions might have helped in at least 8 of the neck/face cases.
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Chest injuries were common.

R sided injuries were thought to be more survivable, and presumed cardiac injuries from spears were considered fatal.

There were 24 deaths:
- 9 non-preventable
- 11 possibly preventable
- 4 preventable

Chest tubes may have been lifesaving for many. Image
Abdominal trauma:

2 cases were non-preventable
3 cases were possibly preventable
16 cases were likely preventable, including 4 cases of isolated liver injury, and 3 cases of evisceration.

Here was the greatest opportunity for improvement (OFI). Image
Pelvis:

There were 5 deaths from pelvic trauma, all were considered 'preventable'. These included 2 bladder injuries.

1 of these was blunt and might have benefitted from a pelvic binder; whether deployment of a REBOA catheter in zone 3 would have helped is speculative 🤔. Image
Deaths from isolated injuries to the shoulder region were not rare (9 cases). They occurred more often on the R side.

Cases of simple hemopneumothorax were almost certainly salvageable.

Some may have had subclavian vascular injuries, of which some could have been survivable. Image
Miscellaneous deaths:

2 extremity injuries were preventable with tourniquets.
1 shoulder disarticulation was possibly salvageable (low likelihood).
5 flank wounds and 3 back wounds - all 'possibly' preventable (not enough data) Image
Case review: Hector

In particular the death of Hector is difficult to analyze. The mechanism was clearly an injury to the neck. As described by Butler, it was to 'the fleshy part' of the neck, not involving the trachea. He was able to speak to Achilles afterward, and gradually bled out. This may indicate death from a jugular vein injury, which may well have been preventable.

Artists often depict a transfixing type injury (below) in which the spear also goes into the chest. This may have created an injury to one or more of the aortic arch vessels, which would have been far less salvageable.Image
In conclusion:

It is estimated that ~40% of the casualties from 'The Iliad' may have been salvageable with modern trauma protocols.

Limitations include the retrospective nature of the study and the incompleteness of medical records in many cases. More studies are needed.
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Addendum:

Some may observe that there were far more than 117 deaths in the Iliad.

The remainder either had unspecified mechanisms (many), or were burns (n=12)

Salvageability estimates can likely be extrapolated to the rest (use of the n=117 to do this is called ‘sampling’). Image

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More from @rbarbosa91

Dec 11, 2024
🧵regarding the Bovie, which is one of the most commonly used tools in surgery.

I have decided to reorganize my Bovie content into something that makes more sense, which will require multiple 🧵. This first one will cover the very basics and is geared toward students.
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Briefly:
Recall that the Bovie is just a tool for completing an electrical circuit that includes a patient's body.

The current passes through the whole system, but because the tip of the Bovie is small, whereas the pad is large, the effect occurs at the place we want it to. Image
The Bovie is not like the light switch in your house that just turns the current on and off.

Instead, we may adjust the intensity of the current and we can also modify the delivery of current (which the machine calls 'CUT' and 'COAG') to provide different effects on the tissue. Image
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Read 16 tweets
Nov 13, 2024
Short 🧵regarding the 'gold' Bookwalter ratchet and one feature that makes it behave differently from the regular ratchet, other than the fact that it rotates.

Also we'll look at a couple of other pointers about the Bookwalter knickknacks.
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If you use the Bookwalter, you're aware that the tray comes with a large number of the standard 'clicky things' (officially: 'ratchets').

It usually also comes with some gold ratchets (usually 4 of these) and we all know that these *can rotate*. Image
Image
This rotation of course enables you to rotate the retractor blade when it is connected to the ring. You cannot do this if the blade is connected to the 'regular' clicky thing.

But you may have noticed that the gold ones also just 'seem' better even when they are *not* rotated. Image
Image
Read 10 tweets
Nov 7, 2024
🧵regarding the introducer sheath commonly known as a 'Cordis' catheter.

We'll go over what it was originally designed for and why it ended up being adopted by other specialties for entirely different reasons.

Also we'll look at its accessories and see what's inside one.
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In the mid 1970's, angiographic procedures started to be done using introducer sheaths, which were much more convenient than passing all the devices through vascular cutdowns, as before.

There was some blood loss with each device exchange, and a sheath was patented to fix this. Image
Specifically, it had rubber gaskets inside the end that formed a seal and minimized blood loss with each exchange.

Shown here is the drawing from the 1977 patent and also a modern example of the sealing apparatus from a different company (I cracked the end open with a hammer). Image
Image
Read 19 tweets
Oct 9, 2024
🧵regarding the side hole at the end of most endotracheal tubes. This is the 'Murphy eye'.

You may or may not have noticed the Murphy eye before. Here we'll briefly go over what it is for, some unintended consequences of it, and (of course) a little history.
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Frank Murphy was an anesthesiologist with interesting choices in facial hair that worked in various places (here seen at UCSF). At the time he devised his tubes, he was at Harper Hospital in Detroit.

Only a little is known about him, and is found here:
bit.ly/3ZRK2O6Image
In essence, Murphy devised his own endotracheal tubes, and listed a number of things these tubes should have that he thought were an improvement over Magill tubes.

Among these was the hole at the end, which came to be called the 'Murphy eye'. Image
Read 12 tweets
Sep 21, 2024
For surgical history nerds:

Here is the main figure from Seldinger's 1953 paper showing what later became known as the Seldinger technique.

There seem to be 2 extra things that Seldinger did that most people probably don't do these days, as we'll see next:
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One of the things Seldinger recommended was to push on the artery during the part when the wire is in to decrease bleeding. Most people skip this now, as the bleeding is usually fairly minor. Also it doesn;t make sense for locations such as the jugular vein. Image
Seldinger also adds in a 180 degree rotation to the needle after insertion.

I'm showing the (modified) diagram here, along with the relevant portion of the text, but to be honest I'm not following exactly what he's doing here. Image
Read 5 tweets
Aug 29, 2024
Once again: a🧵about 🧵's

It's been about a year since I last posted these, but for the new folks, here is a collection of links to each of my 🧵 about surgical sutures.

9 of these are about suture types and the other 3 are miscellaneous suture-related topics.
⬇️(1/ ) Image
Vicryl
(Polyglactin 910)

I am mostly referring to the Ethicon names since that's what our hospital carries.

Read 13 tweets

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