What scar tissue can make a gastric bypass too risky?

Open surgeries cause scarring inside, until we enter we can know how many adhesions there are, it is considered a revision surgery, due to the history of previous surgery, but we can help you perform the sleeve or the bypass if possible.

Yes, your midline supraumbilical C-section scar could be considered a risk factor for gastric bypass, which might allow OHIP to cover a gastric sleeve instead. Scar tissue and adhesions from the C-section can make bypass surgery more complex, whereas a sleeve is simpler since it doesn't involve rerouting intestines. Since you already prefer the sleeve, you may be able to advocate for this option with your surgeon and get it covered.

A midline supraumbilical C-section scar may raise concerns about intra-abdominal adhesions or altered anatomy.
All patients respond differently, there are those who create many adhesions to a very small surgery, and there are those who create few adhesions to large surgeries.
Until the time of surgery it could be confirmed. But of course that there is a possibility of performing gastric bypass, if the adhesions are few, they can be removed and gastric bypass performed. Only if you have many adhesions, gastric bypass could not be performed.