Final answer:
The correct statement about a fistula is that it is usually created in the forearm, near the wrist, especially for hemodialysis. A fistula is not made of salastic tubing, and while ileostomies involve creating an external passage, they are not fistulas.
Step-by-step explanation:
The correct answer regarding a fistula is usually created in the forearm, near the wrist. In medical treatments, particularly for hemodialysis, a fistula is often surgically created to access the bloodstream. It is an artificial connection between an artery and a vein that allows for efficient blood flow during the dialysis process. Option b) 'usually created in forearm, near wrist' is correct. The other mentioned option, a) 'usually created in the leg, near ankle', does not describe the common location for a dialysis fistula. The option c) 'made of salastic tubing', can refer to catheters or other medical devices, but not typically a fistula.
When it comes to procedures relating to the small intestine, such as after certain types of surgery where a new fecal pouch is created, an ileostomy may need to be performed. This involves bringing the distal ileum through the abdominal wall to allow the chyme to be collected externally. While this is also related to the formation of a bodily passage, it is different from a vascular fistula created for hemodialysis.