Cold Chain

COLD CHAIN SYSTEM OF STORING AND TRANSPORTING VACCINES POTENT STATE MANUFACTURER TO THE PERSON BEING IMMUNISED

WHY ? ? VACCINES ARE SENSITIVE LOSE THEIR POTENCY , FASTER WHEN EXPOSED TO HEAT AFTER THAT CORRECT STORAGE CANNOT RESTORE

SENSITIVITY TO HEAT • MOST SENSITIVE

• LIVE OPV MEASLES PERTUSIS AND MUMPS ADSRPD DPT

LEAST SENSITIVE

BCG TT

DAMAGED BY FREEZING DPT DT TT HEP B

COLD CHAIN SYSTEM 3 MAJOR ELEMENTS # COMPETENT PERSONNEL # EQUIPMENTS # EFFICIENT PROCEDURES

WALK IN COLD ROOMS • LOCATED AT REGIONAL LEVEL • FOR STORING VACCINES UPTO 3 MONTHS • ONE FOR 4-5 DISTRICTS

WALK IN COLD ROOM

DEEP FREEZERS & ILR 300 LTR • SUPPLIED TO ALL DISTRICTS • USED FOR MAKING ICE PACKS • STORING MEASLES & OPV VACCINES

SMALL DEEP FREEZER & ILR 140 LTR • ALL VACCINES AT PHC LEVEL ARE STORED IN THE ILR • ALSO IN FP CENTRES & POST PARTUM CENTRES

ILR

COLD BOXES • Mainly for trasportation of vaccines • Supplied To all peripheral centres • Frozen ice packs at bottom & sides

COLD BOXES

VACCINE CARRIERS

• FOR OUT OF REACH SESSIONS • 16 -20 VIALS

DAY CARRIERS • USED TO CARRY 6-8 VIALS • ONLY FOR FEW HOURS

ICE PACKS • CONTAINS WATER • NO SALT • ANY LEAKAGE DISCARD IT.

MAINTENANCE INSTALLATION DEFROSTING CLEANING

CONTROL & MONITORING TEMPERATURE ROUTINE ACTIVITY MAINTAINING CORRECT TEMPERATURE IS A CRITICAL TASK

HOW ? ? THERMOMETERS ALCOHOL, MERCURY, DIAL, LIQUID CRYSTAL, RECORDING.

OTHERS... TEMPERATURE RECORD SHEET

THERMOSTAT COLD CHAIN MONITOR CARD

VVM

BACKGROUND VACCINE IS POTENT OR NOT ? EXCASSIVE HIGH STANDARDS LEADS TO HIGH COST.

VVM • MONITOR DEVICE • APPLIED DIRECTLY TO EACH VIAL • HW CAN VERIFY AT THE TIME OF USE

CONT..

• HUGE SAVINGS N THE COST OF IMMUNIZATION .

HOW DOES IT WORK? • HEAT SENSITIVE SQUARE IN A CIRCULAR DISK • COLOUR CHANGES WITH EXPOSURE TO HEAT • INNER SQUARE WHITE TO DARKER

REFERNCES WWW.WHO.INT PARK’S TEXTBOOK OF PSM