Yohanna...I have no expertise...however, I can be very opinionated... suggesting some questions for you to ask the doctors...
1: name of artery and which segment (the # varies much by artery)
2: was it the artery wall and/or the aneurysm wall that ruptured?
NOTE: those walls/distance can be so close...There is a parent artery where the aneurysm is near, or adjacent to, another artery branching off the "parent" artery...
3: what type of aneurysm does (or did) your mother have?
NOTE: most normal size/shape named a "berry" aneurysm ... or a wide-necked aneurysm; or a fusiform ...or any other name / shape?
OR.. did your mother have a weakened artery wall that ruptured...and, not a true aneurysm?
5: which ventricle was being relieved/directed by the shunt?
Note: 4 ventricles: L and R lateral ventricles (the 2 - at the top area of the limbic system - the central base area of our brain where it connects to the spinal column); the 3rd ventricle (below the L/R laterals); and the lowest, the 4th ventricle (near/around the brain stem... connection of brain/spinal cord area) (if you choose to research any words/structures: search online: the name...anatomy and function)
6: Request a CD/DVD of the various images taken from (MRI/A, CT/A; DSA or conventional angiograms, any ultrasounds..,) diagnosis to/for any procedure...the implant of a shunt...
NOTE: Ask them for the Series # and the image #...of the aneurysm
7: Your initial notes are that your mother had a "shunt surgery"
NOTE: Ask them to show the images of the artery that was ruptured...and, the initial diagnosed aneurysm..
Now, each one of these 7 questions/comments...may generate more questions...
RECOVERY: how is your mother?
1: Can she talk? See? Hear? Walk? Have tests been done on her vision / hearing?
NOTE: If not. are they planned / scheduled or recommended in any time frame?
NOTE: is she able to talk / converse with you? Will she be "home alone" or have help?
2: I asked the open questions above...does she have coordination / balance?
Yohanna, I have just taxed (used/drained my brain cells based on my experiences) ..
Prayers for you / your mother...and her recovery...and for you to keep us updated... in success/results.