| 摘要 |
1,142,323. Surgical dressing, optionally comprising adhesive tape. T. J. SMITH & NEPHEW Ltd. 1 April, 1966 [8 April, 1965; 4 May, 1965], Nos. 15009/65 and 18770/65. Heading A5R. An air-pervious surgical dressing consists solely of an absorbent pad upon which a recticulated film of an organic thermoplastic material is arranged to provide a wound-contacting but wound-non-adherent surface, the film having been produced by the biaxial stressing of a sheet of thermoplastic material having a regular pattern of embossments or cavities on at least one surface. The stressing of the sheet material in the two directions may have been done either sequentially, as disclosed in Specification 914489, or simultaneously, as disclosed in Specification 1055963. The film may have a thickness of from 0.003 to 0.006 inch; the openings in the film may have a diameter of 0.010 inch and may occupy 25% of the total area of the film. The thermoplastic material from which the film is made may be a polymer of an olefin, for example ethylene or propylene, or a copolymer of olefins; the preferred material is high density polyethylene. The absorbent pad, which may be rectangular, oval or circular in shape, may comprise cotton wool, "cellulose", rayon wool, lint or cotton gauze. The above-disclosed air-pervious surgical dressing may be mounted on a pressure-sensitive adhesive tape; the exposed adhesive portions of the adhesive tape may be covered with conventional removable protective strips. Various dispositions and sizes of the pad and/or the film relative to the film and/or the adhesive tape and various arrangements for securing the pad and/or the film to the film and/or the adhesive tape are fully disclosed in the Specification which makes reference also to Specification 1075487. |
