Advantages, sources, procedures and methods involved in purchasing

       Importance of central sterile supply department


After completion of this lecture, student will be able to:

       Explain purchasing of drugs

       Describe Central Sterile supply Department



The service, with in the hospital, catering for the sterile supplies to all departments, both to specialized units as well as general wards and OPDs”


       Centralizing the activities of receipt, cleaning, assembly, sterilization, storage and distribution of sterilized materials from a central department

       Safe sterilization is done under controlled conditions with adequate managerial and technical supervision at an optimum cost

       To provide an efficient, economic, continuous and quality supply of sterilized material to various areas of the hospital to deliver quality and infection free patient care

       Contributes to reduction in hospital infection rate

Functions & Activities


Planning of CSSD

The CSSD can broadly be classified into two parts

Central unit - Responsible for receiving dirty Utilities cleaning, processing, Sterilization, storage and supply

Peripheral unit - Mainly responsible for distribution to various areas of hospital.

                            - TSSU (Theater Sterile Supply Unit)

Planning a Department

Lay Out Designing Principle

       There is no back tracking of sterile goods

       One way movement from receiving counter to issue counter

       Sterile area should be prior to sterile storage and issue

       The receiving counter must be away from the issue counter

       Separate receiving and issuing counter

There should minimum six basic division in CSSD

Structural Designing

       The Central Unit comprises of three zones, separated by two distinct barriers

       One collection window

       one supply window on the other end


Cleaning area:

       High capacity pass through washer disinfector at 800C to 900 C having various shapes and sizes

       Cold and hot water streams

       Detergent Solution

       Steam when available

       Hot air ovens for drying instruments

       Wall fixtures for drying

Sterilization area

       Autoclaves using dry heat, moist heat

       Ethylene oxide sterilizers

       Testing material to check effectiveness of sterilization

Storage and Distribution

       Cup boards, selves, tables, chairs, racks

       Trolleys, instrument trays, wire baskets and containers

Other Equipment

       Cleaning and decontamination devices

       Hot air Oven for drying & heat sterilization

       Glove processing unit for surgical gloves

       Instrument sharper e.g.. Needle sharper

       Testing apparatus for emergency sterilization

       Others :- trolleys, work surface, telephones

       Maintenance and repair of equipment's

       Material : chemicals for washing and cleaning

       Steam Boiler

Articles to be sterilized


Staffing should be planned based on following factors:-

1. Three shift working

2. Messenger service

3. Maintenance service

4. Staff for 6 areas

Leave and off duty

       Average 02 technicians for 100 beds and one technical supervisors

       One clerk for keeping records, accounting and supply/ shift

       Average 04 attendants per 100 beds in all shifts

       Adequate number of cleaning attendants and transporters

       One technician and two attendants should be stationed at each zone




       It is a process of freeing an article from all living organisms including bacteria ,fungal spores and  viruses                   

       A material is pronounced sterile if it achieves 99.99%  kill of bacterial spores


Types of Autoclaving Machines

          Downward Displacement

          Vacuum Assisted.

          Pulsed Steam Dilution


          After sterilization the sterilized items are kept in different racks as per labeling

          Supplied as per the demand of different area

          To ensure continuous availability of sterile supply five times of daily requirement should be available in storage

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