Abstract: The concentrator couples a plurality of digital and analog sources to an audio/video reader system suitable for reading one of the sources. Each available source is associated with a source identifier and an activated or deactivated state flag, as a result of the user taking action on a source. A register (42) contains an identifier of the current source being read, and a multiple-level LIFO stack (44) stores an ordered list of identifiers of other sources on standby waiting to be read. When a new source is activated, automatic means replace the content of the register with the identifier of the new source so as to substitute the new source for the current source in order to enable it to be read by the system, and concurrently said automatic means add the identifier of the current source to the stack. The inverse operation is performed when the current source is deactivated, with the most recent source contained in the stack being substituted for the current source so as to enable it to be read by the system.

Abstract: The invention concerns an absorbent for blood and serous body fluids consisting of at least two components, A and B, whereby component A is a crosslinked synthetic or natural polymer or copolymer, and component B is an organic and/or inorganic compound which is water-soluble and solid at normal temperature. The absorbent contains 25 to 98 weight % of component A and 2 to 75 weight % of component B. The invention, moveover, concerns the use of the said absorbent for absorption and/or retention of blood and serous body fluids, in particular in absorbent throwaway articles for surgical, medical and hygienic purposes.

Abstract: The invention concerns an absorbent for blood and serous body fluids consisting of at least two components, A and B, whereby component A is a crosslinked synthetic or natural polymer or copolymer, and component B is an organic and/or inorganic compound which is water-soluble and solid at normal temperature. The absorbent contains 25 to 98 weight % of component A and 2 to 75 weight % of component B. The invention, moveover, concerns the use of the said absorbent for absorption and/or retention of blood and serous body fluids, in particular in absorbent throwaway articles for surgical, medical and hygienic purposes.