Process of making a surgical sponge containing an x-ray contrast agent

US4938901A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Dieter Groitzsch · Hirschberg, DE
• Bernhard Klein · Bear River, US
• Gerhard Schaut · Radebeul, DE

Key dates

• Filing date: Sep 2, 1988
• Grant date: Jul 3, 1990
• Expiry date: Sep 2, 2008

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B90/39
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a process for producing a surgical sponge which contains contrast agent embedded in a polymer matrix in proportions of up to 70 wt. %. The matrix consists of a polymer material free of plasticizers. In the process for the production of the sponge a matrix for the contrast agent is used, which is an uncrosslinked, viscous liquid, prepolymer state until after it has been extruded onto the basic fleece material, and not until a process step that then follows is the polymerization completed.