Less Wrong is a community blog devoted to refining the art of human rationality. Please visit our About page for more information.

Dr_Manhattan comments on [Link] Reddit, help me find some peace I'm dying young - Less Wrong

22 Post author: Konkvistador 18 August 2012 03:17PM

You are viewing a comment permalink. View the original post to see all comments and the full post content.

Comments (181)

You are viewing a single comment's thread. Show more comments above.

Comment author: Dr_Manhattan 20 August 2012 11:22:07PM 1 point [-]

I understand the point, but do you have any stats on this or just guessing? Esp. for adult drivers buckle in and such.

Comment author: V_V 21 August 2012 12:42:26AM 0 points [-]

Guessing.

I'm not a doctor so I may be missing something important, but I can't think of any type of predictably fatal traumatic injury that leaves you alive with an essentially intact brain for at least 1 - 2 days.

Some statistics

Notably: "In the western world, the most common cause of death after trauma is severe brain injury.", "In modern day civilian trauma centres, thoracic injury directly accounts for 20-25% of deaths due to trauma; thoracic injury or its complications are a contributing factor in a further 25% of trauma deaths"

Comment author: Kawoomba 22 August 2012 09:38:50PM 0 points [-]

Death in the vast majority of cases entails general ischemia due to the cessation of circulation, trauma or no. How sensitive your brain is to a lack of oxygen is easily tested by having someone compress both your carotid arteries for 60 seconds. (The exception to the death-ischemia link would be brain death with circulation upheld for a variety of reasons, most commonly viability for organ transplantation.)

The killer consideration with fatal traumatic injuries is their unpredictability. Such an event will most probably drastically prolong the time to cryopreservation, at least by hours. Where are you? Which hospital are you announced dead in? Where's the nearest cryopreservation team? When in the process are they notified? How long is their travel time? How much damage is done while you're not yet announced dead?

The delay, hours of ischemia (while being dead), is what will degrade your brain tissue to a microscopically garbled mess, regardless of the specific type of trauma.

It bears repeating: Even the penumbra of neurons = the peripheral neurons that after a stroke still get some measure of oxygen are given up upon after 4-5 hours (no benefit from further treatment). The central neurons most affected by an ischemic event are considered lost within an hour.