Mínimum criteria in deprivation of liberty On the other hand, the video-surveillance and video-recording protocols of the CP reporting to the Directorate General for Penitentiary Services of the Government of Catalonia are a matter of satisfaction. At these, pictures are recorded in a hard disk, which remains at the office area and to which the officers do not have access, the manager keeping the relevant extractions in an independent disk, for six months, having to obtain authorisation for its destruction, after such period has expired, from the general management. Mechanical restraint cell with video-surveillance at the CP for women of Barcelona 173. The control by the surveillance officers, service managers and professional personnel of the immobilisations should be placed on record, stating the specific state of the inmate and the need to continue the measure. 174. Officers should extreme control of the temperature, ventilation and conditions of the immobilisation and, to the extent possible, untie the inmates for them to be able to eat, drink or attend to their physiological needs, entering this in the book monitoring the measure, for it not to be more burdensome than absolutely necessary, since it would otherwise be a punitive use of immobilisations and, accordingly, a form of torture and cruel, inhuman and degrading treatment. 175. The NPM expresses its concern with the fact that metal handcuffs are used for several hours at certain CP. It must be remembered that metal handcuffs are indicated only for short contentions (such as moving inmates between departments), and it is compulsory to use cloth material restraints for immobilisations. 176. The reporting to the penitentiary judge of the commencement and cessation of the application of coercive measures should take place immediately, the practice observed at certain CP of sending the information to the court several days or even weeks after the facts not being correct. In addition, it would be advisable for the report to the penitentiary surveillance judge, apart from the date and starting and ending times, and the reasons for adoption of the 73