A method for the preparation and packaging of a sterile procedure pack or kit for operating room use comprising the following work steps: a) washing and folding of reconditioned reusable technical textile garments and microchip reading and saving of traceability data through appropriate electronic means; and/or a') washing and folding of new reusable technical textile garments and microchip association and saving of traceability data through appropriate electronic means; b) provision of a controlled contamination environment for the preparation of a procedure pack or kit for operating room use; c) provision, within the environment referred to in paragraph b), of said reusable technical textile garments equipped with microchips, of further single-use technical textile garments, as well as typical accessories for the operating room, in particular extensions, bowls, caps, scalpels, syringes, needles, tweezers, valves, cotton gauze, etc. d) preparation, packaging and closing of a procedure pack containing the materials or products referred to in paragraph c) within said controlled contamination environment; e) sterilisation of the procedure pack referred to in paragraph d) through treatment with ethylene oxide gas (EtO) for a predetermined time, at a predetermined temperature, predetermined pressure and predetermined humidity level inside a sterilisation autoclave according to the following process: i) inserting the closed procedure pack into said autoclave, heating it to a temperature comprised between 50°C and 60°C, and eliminating air by placing under vacuum; ii) injecting steam and consequent humidification up to a desired relative humidity (rh) value comprised between 30% and 60%; iii) inletting of ethylene oxide (EtO) sterilising gas without substantial temperature variations at a pressure of at least 48kPa; iv) exposing said procedure pack to the gas for a predetermined time comprised between tens of minutes and a few hours; v) evacuating the gas from the autoclave; vi) forced degassing; vii) carrying out final vacuum cycles alternating with the inlet of sterile air/inert gas; f) reading via appropriate electronic means of the data contained in the microchip of the RTT material contained inside the pack. a) washing and folding of reconditioned reusable technical textile garments and microchip reading and saving of traceability data through appropriate electronic means; and/or a') washing and folding of new reusable technical textile garments and microchip association and saving of traceability data through appropriate electronic means; b) provision of a controlled contamination environment for the preparation of a procedure pack or kit for operating room use; c) provision, within the environment referred to in paragraph b), of said reusable technical textile garments equipped with microchips, of further single-use technical textile garments, as well as typical accessories for the operating room, in particular extensions, bowls, caps, scalpels, syringes, needles, tweezers, valves, cotton gauze, etc. d) preparation, packaging and closing of a procedure pack containing the materials or products referred to in paragraph c) within said controlled contamination environment; e) sterilisation of the procedure pack referred to in paragraph d) through treatment with ethylene oxide gas (EtO) for a predetermined time, at a predetermined temperature, predetermined pressure and predetermined humidity level inside a sterilisation autoclave according to the following process: i) inserting the closed procedure pack into said autoclave, heating it to a temperature comprised between 50°C and 60°C, and eliminating air by placing under vacuum; ii) injecting steam and consequent humidification up to a desired relative humidity (rh) value comprised between 30% and 60%; iii) inletting of ethylene oxide (EtO) sterilising gas without substantial temperature variations at a pressure of at least 48kPa; iv) exposing said procedure pack to the gas for a predetermined time comprised between tens of minutes and a few hours; v) evacuating the gas from the autoclave; vi) forced degassing; vii) carrying out final vacuum cycles alternating with the inlet of sterile air/inert gas; i) inserting the closed procedure pack into said autoclave, heating it to a temperature comprised between 50°C and 60°C, and eliminating air by placing under vacuum; ii) injecting steam and consequent humidification up to a desired relative humidity (rh) value comprised between 30% and 60%; iii) inletting of ethylene oxide (EtO) sterilising gas without substantial temperature variations at a pressure of at least 48kPa; iv) exposing said procedure pack to the gas for a predetermined time comprised between tens of minutes and a few hours; v) evacuating the gas from the autoclave; vi) forced degassing; vii) carrying out final vacuum cycles alternating with the inlet of sterile air/inert gas; f) reading via appropriate electronic means of the data contained in the microchip of the RTT material contained inside the pack.