How common without serious abdominal trauma? I didn't bruise, tear any muscles or crack any ribs or anything of the like. That kind of stat might give me something to brag about, not like a crappy immune system is something to be proud of.

The grading system is kinda cool. Unfortunately I can't use behind my current WiFi away from home. Maybe you can tell me how I did: The spleen was horizontally rupture into two pieces.

It's not that uncommon to have little to no bruising. One of the more common signs is actually pain in the left shoulder[1]

As far as the grading of your spleen... It depends on whether the major vessels leading into the spleen were torn or not, but it certainly sounds like you had a grade 4 or 5 tear (on a scale of 1 to 5).

[1]: https://en.wikipedia.org/wiki/Kehr's_sign

That's really interesting, aren't nerves wonderful things?

4 or 5 sounds about right, I lost something around 2 quarts of blood, though that may have more been due to inaction.

All I remember from the ultrasound was thinking the red was really pretty, and then vomiting.

Thanks for sharing your knowledge, it's fascinating stuff.

Two quarts is getting very close to irreversible shock territory, so nice job not dying.

EDIT: Upon rereading... If you were in primary school, then two quarts would represent a very large fraction of your total blood volume (like, anywhere from 70 to 120%). You'd be very firmly in 'dead' territory at that point (assuming they weren't simultaneously putting more in)