There are many medical reasons that can cause black stools that are tarry with a foul smell, but sometimes dark stools are caused by eating certain foods or taking iron supplements. However, black stools can also be a result of bleeding, and the darker color indicates that the blood could be coming from a point in the upper gastrointestinal tract.
Gertrude Levandowski survived a 96-hour procedure at a Chicago hospital to remove a giant ovarian cyst; the longest surgery. The second longest surgery ever was 40 hours long and that was to remove 6 limbs from a 8 limed baby in India. But the most common longest surgery is spinal cord surgery it is a 14 hour surgery.
Endoscopic Coronary Artery Bypass Surgery. Coronary artery bypass graft (CABG) surgery is a major heart operation performed on more than a half-million people each year. Typically, the recovery time is four to eight weeks after surgery. However, less invasive techniques, which are offered by Washington University heart surgeons, are changing the face of this type of surgery.