Pelvic floor dysfunction can be diagnosed by history and physical exam, though it is more accurately graded by imaging. Historically, fluoroscopy with defecography and cystography were used, though modern imaging allows the usage of MRI to complement and sometimes replace fluoroscopic assessment of the disorder, allowing for less radiation exposure and increased patient comfort, though an enema is required the evening before the procedure. Instead of contrast, ultrasound gel is used during the procedure with MRI. Both methods assess the pelvic floor at rest and maximum strain using coronal and sagittal views. When grading individual organ prolapse, the rectum, bladder and uterus are individually assessed, with prolapse of the rectum referred to as a rectocele, bladder prolapse through the anterior vaginal wall a cystocele, and small bowel an enterocele.
The pelvic floor muscles support various pelvic organs, including the bladder, prostate, rectum, and female reproductive organs. The muscles themselves are also involved in the functioning of the urinary and anal sphincters. When they are functioning normally, you are able to control your bowel and bladder movements by contracting and relaxing these muscles.
Mechanistically, the causes of pelvic floor dysfunction are two-fold: widening of the pelvic floor hiatus and descent of pelvic floor below the pubococcygeal line, with specific organ prolapse graded relative to the hiatus. Associations include obesity, menopause, pregnancy and childbirth. Some women may be more likely to developing pelvic floor dysfunction because of an inherited deficiency in their collagen type. Some women may have congenitally weak connective tissue and fascia and are therefore at risk of stress urinary incontinence and pelvic organ prolapse.
To assess the degree of dysfunction, three measurements must be taken into account. First, an anatomic landmark known as the pubococcygeal line must be determined, which is a straight line connecting the inferior margin of the pubic symphysis at the midline with the junction of the first and second coccygeal elements on a sagittal image. After this, the location of the puborectalis muscle sling is assessed, and a perpendicular line between the pubococcygeal line and muscle sling is drawn. This provides a measurement of pelvic floor descent, with descent greater than 2 cm being considered mild, and 6 cm being considered severe. Lastly, a line from the pubic symphysis to the puborectalis muscle sling is drawn, which is a measurement of the pelvic floor hiatus. Measurements of greater than 6 cm are considered mild, and greater than 10 cm severe. The degree of organ prolapse is assessed relative to the hiatus. The grading of organ prolapse relative to the hiatus is more strict, with any descent being considered abnormal, and greater than 4 cm being considered severe.
Rectocele: A rectocele is a bulge of the front wall of the rectum into the vagina. Normally, the rectum goes straight down to the anus (picture). When a patient with a rectocele strains, the stool may get caught in an abnormal pocket of the rectum which bulges into the vagina. This prevents the patient from emptying the rectum completely. Generally, rectoceles do not produce symptoms. As they grow larger, rectoceles may cause difficulty going to the bathroom, or cause leakage of stool after having a bowel movement. Rectoceles are more common in women who have given birth. Rectoceles are usually caused by thinning of the tissue between the rectum and vagina and weakening of the pelvic floor muscles.
Pelvic floor dysfunction is a group of disorders that change the way people have bowel movements and sometimes cause pelvic pain. These disorders can be embarrassing to discuss, may be hard to diagnosis and often have a negative effect on quality of life. Symptoms vary by the type of disorder. Many general practitioners may not be familiar with pelvic floor dysfunction, and it may take a specialist, such as a colorectal surgeon, to discover the correct diagnosis.
When some or all of these structures of the pelvic floor are not functioning properly, they can cause a multitude of different symptoms. People who are suffering from bowel, bladder, and or sexual problems, as well as those who are suffering from pain in the pelvis, upper legs, abdomen or buttocks most likely have pelvic floor impairments contributing to their pain.