The use of historical nomenclature for pelvic venous disorders fails to recognize the complex and interrelated pelvic venous circulation; contributes to misdiagnosis and poor treatment outcomes; and hinders clinical research. The SVP (Symptoms-Varices-Pathophysiology) instrument is designed to clarify the classification of pelvic venous disorders by defining homogenous patient populations. The SVP instrument will facilitate clinical communication, allow treatment to be more precisely directed, and facilitate the development of patient-reported outcome measures and clinical trials.