When mechanical, anatomic, and disease- and diet-related causes of constipation have been ruled out, clinical suspicion should be raised to the possibility that PFD is causing or contributing to constipation. A focused history and digital examination are key components in diagnosing PFD. The diagnosis can be confirmed by anorectal manometry with balloon expulsion and, in some cases, traditional proctography or dynamic magnetic resonance imaging defecography to visualize pathologic pelvic floor motion, sphincter anatomy and greater detail of surrounding structures.
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.
^ Mateus-Vasconcelos, Elaine Cristine Lemes; Ribeiro, Aline Moreira; Antônio, Flávia Ignácio; Brito, Luiz Gustavo de Oliveira; Ferreira, Cristine Homsi Jorge (2018-06-03). "Physiotherapy methods to facilitate pelvic floor muscle contraction: A systematic review". Physiotherapy Theory and Practice. 34 (6): 420–432. doi:10.1080/09593985.2017.1419520. ISSN 0959-3985. PMID 29278967. S2CID 3885851.
With her finger inside me, Christensen mentioned that the three superficial pelvic floor muscles on each side were very tight and tensed when she touched them. I was too tight and in pain for her to check the deepest muscle (the obturator internus). Finally, she checked to see if I could do a Kegel or relax the muscles, and I was unable to do either.