A bolt straight to the sternum, stopped by the spine, will nick the heart, go through the bottom of the liver and the top of the diaphragm. Further, the oesophagus jinks just there, with about enough space to let a bolt pass between it and the stomach.
'Sprained' isn't in the standard wound types, according to the wiki. So yes, mod. Regardless, it means something like grey damage from a non-piercing source. So the bolt lost the tip on the way through the ribs, resulting in blunt trauma.
both kidneys(pierced)
pancreas (pierced)
spleen (broken)
and it broke has lower body and stay there.
My lower anatomy isn't as good as my head anatomy, but that's pretty impressive given the distance between the kidneys, the fact that the spleen is behind the ribcage, and how it completely avoided the guts.
I know 'upper body' essentially means ribcage, but I really don't know what 'lower body' is. Judging by the organs considered lower the area is everything that isn't legs below the ribs, but the actual organ it represents...
I'm going to go with; bolt enters from the right, heading slightly upward. (I assume you are a dwarf shooting at a human...it is plausible.) It goes through the bottom of the right kidney, the top of the left kidney, passes by the pancreas (this would also damage the duodenum, but not the 'stomach' or 'guts') and gets lodged under the ribcage where the spleen is.
1 iron bolt
both eyes out,
both ears pierced
nose pierced
throat out
neck pierced
brain pierced
This really is impossible without damaging the head.
Okay so the bolt strikes the throat and bounces out, off the spine, and then an
extremely powerful gust of wind sends it back into the nose, cutting it, whereupon it goes into the left eye, but bounces out again with such force that the flights slash the right eye. Then it cuts both ears out of sheer spite. It is a very bitter bolt.
The brain takes repeated shockwaves, adding up to grey damage from a bolt, or 'pierced'