Positioning device for radiation treatment of cervical carcinoma

Claim 1

Apparatus for radio-active treatment of cervical tumors comprising: a flexible, collapsible, cylindrical toroidal chamber having an aperture therethrough adapted to be positioned around the cervix, said toroidal chamber having top and bottom surfaces, top and bottom flanges extending radially outward respectively, from said top and bottom surfaces of said chamber, each of said flanges having a plurality of openings, each opening in said top flange being aligned with a corresponding opening in said bottom flange, an inlet tube in communication with the interior of said toroidal chamber and adapted to extend to the outside of the body and to permit flow of radio-opaque fluid into and out of said toroidal chamber, flow of fluid into said chamber when said chamber is collapsed causing said chamber to expand and flow of fluid out of said chamber when said chamber is expanded permitting collapse of said chamber, each pair of aligned openings of said flanges being adapted, when said toroidal chamber is filled, to hold a support stem of an ovoid and to position said ovoid relative to the cervix.