GI Motility Testing: A Laboratory and Office Handbook

Henry P. Parkman, MD; Richard W. McCallum, MD, FACP, FRACP (Aust), FACG; Satish SC Rao, MD, PhD, FRCP (Lon)

Chapter 17: Overview And Evaluation Of Colonic Symptoms (continued)

Wendy A. Mikulski, DO; Asyia S. Ahmad, MD

Colonic symptoms such as constipation, diarrhea, and fecal incontinence are common and are due to various etiologies, varying from systemic illnesses to neuromuscular disturbances of the gut. In evaluating these symptoms, stool frequency may be misleading. A patient with watery stools may have fecal impaction with overflow diarrhea, whereas a patient with diarrhea may have solid bowel movements with increased stool frequency.1,2 Stool form and consistency have been shown to better correlate with GI transit time. The Bristol Stool Scale (Figure 17-1), which classifies…