Calculating vaccine store requirements - Nccvmtc.org

Calculating vaccine storerequirements

Nos of doses required to be store is calculatedon the basis of population catered by the storeand nos of shipments Vaccine packed volume is calculated as pervaccine volume calculator (WHO/V&B/01.27)available at www.int./vaccinedocuments/docs/pdf01 Volume of mixed antigen can be calculated asper CCA 2008:

Calculating the capacity of storesHow many cold chain units (WIC) and (WIF) are there?What is their gross capacityThe net shelf capacity of cold rooms is approximately 42% ofgross volumeMultiply the net shelf volume with number of unitsDescriptionSide shelves (4on each side)Back shelves (4total)in metersShelvesLengthWidthHeightIn cubic meterTotal8 2 0.6 0.5 4.84 4 0.6 0.5 4.8Inner row 4 1.5 1 0.5 3Total in cubicmeter12.6Gross volume 3.6 4 2.1 30.24% of shelfvolume42%

Cold storage capacity can be calculated afterconsidering grossing factors of cold room as WHOguidelines who/V&B/02.34Roomvolume5m310m315m320m330m340m3Grossingfactor3.23.33.73.94.24.2Storage Volume required: Total vaccine packed volumex Grossing factor

Example Mixed antigen can be stored in 32 Cum WIC Volume of Mixed antigen per target beneficiary (13.5doses) =55.47 cm3 (as per CCA-2008) Average volume per dose = 55.47/13.5 = 4.1 cm3 Gross factor for WIC 32 cum capacity = 4.2 Gross volume required per dose of mixed antigen =4.2 x 4.1 = 17.22 cm3 1m3 = 100 x 100 x 100 cm3 Total doses can be stored in WIC = (32/17.22) x(100x100x100) = 18.5 lakh doses

Calculation Dry Storage Area forStorage of AD Syringes Volume AD syringes as per MLM module 1;table 1.10

Calculations Example: To store 1500 lakh 0.5 ml AD Syringes 250 lakh 0.1 ml syringes 50 lakh 5ml mixing syringesCalculations: Volume AD syringes as per MLM module 1; table 1.10 0.5 ml = 60.6 cm3 0.1 ml = 35.9 cm3 5 ml = 57.2 cm3 Total volume required to store; For 0.5 ml = 60.6 x 1500/(100x100x100) = 9090 cum For 0.1 ml = 35.9 x 250 (100x100x100) = 898 cum For 5 ml = 57.2 x 50 (100x100x100) = 286 cum Total Volume required = 9090 + 898 + 286 = 10274 cum Maximum allowable height 2.2 m Net area required for safe storage of AD syringes 10274/2.2 = 4670 sq.m

ExerciseHow much volume in cum required to store followingantigen in 16 cum capacity WICVaccinesRequired to storeBCGDPTTTHepTotal1000005000002000002000001000000

Some Essential Tips regarding Cold ChainName ofEquipmentILR MK 300 ( Vestfrost)DF SB 300 ( VestFrost)ILR MK 140 ( VestFrostDF SB 140 ( VestFrost)Indian DFShould be usedfor making Icepacks only & notfor vaccinestorage as holdover time is verylessPHCPHC280 ltrs200 ltrs130 ltrsElectrical Cold Chain EquipmentPlace ofInstallationDistrict HQDistrict HQCapacityVaccine StorageCapacity60,000 doses ( Mixed Antigen)2,00,000 doses ( if only OPV)75000 DPT /TT1,20,000-2,00,000,Doses 2,00,000,Doses ofOPV2,50,000 Doses ( MixedAntigen)50000-80000 doses ( if onlyOPV)76,000-1,20,000 doses of OPVFreezing Capacity25 Ice packs per day20 Ice packs per day15 Ice packs per dayIce PackFreezingCapacityNil24-2626Nil16-20Total storage Capacity250 ice packs200 ice packs150 ice packsHold Over Timeat differentTemperatureAt 43C for 22 hrsAt 32 C for 26 hrsAt 43C for 22 hrsAt 32 C for 26 hrsAt 43C for 68 hrsAt 32 C for 72 hrsAt 43 C for 22 hrsAt 32 C for 26 hrs

Non –Electrical Cold Chain EquipmentName ofEquipmentPlace ofInstallationVaccine StoragecapacityIce packFreezingcapacityHold overtime atdifferentTemperatureCold Box 20ltrsDistrict HQ6000 Doses ( MixedAntigen)200000 doses ( onlyOPV) with 24 Ice packs72-96 IcePacks5-77 days ( 168hrs)Cold Box 5ltrsPHCPHC (N)1500 doses ( MixedAntigen)5000 doses ( only OPV )with 24 Ice packs36 Icepacks3-44 days(100hrs)Vaccinecarriers ( 1.7ltrs)Districts/PHC/SC16-20 Vials4 packs24-36 hrsDay carriers (0.85 ltrs)Districts/PHC/SC6-88 Vials2 packs6-88 hrs