arcing spring contraceptive diaphragm

arcing spring contraceptive diaphragm

[är′king]
a kind of contraceptive diaphragm in which the flexible metal spring that forms the rim is a combination of a flexible coil spring and a flat band spring made of stainless steel. The latex or silicone rubber dome is approximately 4 cm deep, and the diameter of the rubber-covered rim is between 55 and 100 mm. Seven sizes, in increments of 0.5 cm, allow the clinician to fit the diaphragm to a particular woman. The kind of spring and the size of the rim in millimeters are stamped on the rim (e.g., 75 mm arcing spring). This kind of diaphragm is prescribed for a woman whose vaginal musculature is relaxed and does not afford strong support, as in first-degree cystocele, rectocele, or uterine prolapse. Compare coil spring contraceptive diaphragm, flat spring contraceptive diaphragm. See also contraceptive diaphragm fitting.