After a brief review of the range of monitoring accessories, the author considers the problem of their hospital standardization (various needs of the different hospital units, diversity of the monitors, existence of central purchasing departments, pressure from the treasurer's office). The availability of supply is assured by a medical supply unit, which is managed by the anesthesiology department. Its function is to fulfill all hospital requirements for disposable minor medical and linen supplies. The medical supply unit must resolve three problems: a medical problem (choice of supplies); a management problem (availability of supply); and a financial problem (survey and control of expenses). It requires the participation of a competent physician, and a close and trustful collaboration with the various partners: medical units, hospital administration, exterior suppliers. The existence of a Medical supply unit in a hospital should not be considered as a purpose in itself, but rather as a relatively simple medium for improving the quality and quantity of the supplies required in good patient care.