Abstract: Example embodiments of the present invention relate to an arrangement and a method for interacting with an internal body organ. The arrangement may include a sheath in which at least two elongate structural elements are inserted. The structural elements may each have a proximal end and a distal end. The sheath may have a proximal end and a distal end, said distal end being open. When the structural elements are displaced relative to the sheath, they may extend through the open distal end of the sheath and at least partly in the transverse direction away from the sheath for distending and/or expanding interaction between the distal end of each structural element and a body organ.

Abstract: Particles according to the invention are made of a viscoelastic medium, are injectable gel particles, and have a size, when subjected to a physiological salt solution, in the range of from 1 to 5 mm. The particles are useful in a soft tissue augmentation implant. The implant comprises particles of a viscoelastic medium, wherein a major volume of the particles are injectable gel particles according to the invention. The implant is useful in a method of soft tissue augmentation in a mammal, including man, comprising subepidermal administration at a site in said mammal where soft tissue augmentation is desirable, of an implant according to the invention.

Abstract: The present invention provides a process for preparing a cross-linked biocompatible polysaccharide gel composition, which comprises:forming an aqueous solution of a water soluble, cross-linkable polysaccharide;initiating a cross-linking of said polysaccharide in the presence of a polyfunctional cross-linking agent therefor;sterically hindering the cross-linking reaction from being terminated before gelation occurs, an activated poly-saccharide being obtained; andreintroducing sterically unhindered conditions for said activated polysaccharide so as to continue the cross-linking thereof to a viscoelastic gel. The invention also provides a gel composition obtainable by such a process as well as gel compositions for different medical uses.