Complex sentence: These units are used during grooming and also with veterinary procedures performed with the animal standing, especially if it requires heavy sedation, or to permit surgery under sedation rather than general anesthesia.
Split into simpler sentences: These units are used during grooming and also with veterinary procedures performed with the animal standing, especially if it requires heavy sedation. For some surgical procedures, this is reported to be efficient, PMID 18564258 or to permit surgery under sedation rather than general anesthesia.