Holla's Bottle method of Keeping Vaccines in the ILR at PHC/CHCs

great information. Congratulations! Mathu Santosham Johns Hopkins University Baltimore, USA

Sir Thanks for the appreciation

The history goes that ILRs are coldest in the bottom. This is not the case with VESTFROST (as here) ILRs. They are coldest in the top, the reason for that is that the ice-lining is in the upper part. So, the storage code should be opposite for VESTFROST ILRs. I did temperature monitoring, with data loggers, of this and have the supporting data, I am trying to attach, but it does not work. I can send to your e-mail Technet-ILR.doc

Please outline the problems you are facing with attaching files on the forum so that others can benefit from the discussion too. If you send the document to me I can attach it to the post.

Sir Thanks for the response, Unlike Deep Freezer, the cooling starts from the upper portion where the Ice Lining is provided in the ILR. (The first lot we received around 1990 with waterproof ply-wood sleeve to retain the lining of Icepacks had lining up to the bottom which are still under use.) The present ILR's have one row of Icepacks in the upper portion. The air as it cools first at the upper portion being heavier moves to the bottom (advantageous) and sets up passive circulation to maintain uniform distribution of temperature within the cabinet, sustain regular compression cycle and increase the longevity of the machine. As there are 3 baskets, the 'code' is developed for the optimum utilization of the space because of differential heat/freeze sensitivity and for uniformity. Sir, I have attached the photos of both type to insist the use of present generation ILR. With regards, Holla

Sir  I have attached 3 photos with notes on high risk storage practice  which may please be attached to the post for sharing with Dr Karansagar, Mr Soren Spanner and  other viewers. Regards Holla High-risk-storage.docx

Hi Soren, I have seen similar problems of temperature control with chest type refrigerators. That's one of the reasons we make the upright, front opening design. It's much easier to use, gives better temperature control and you don't need to take vaccines out into high temperature air to access stock deeper in the compartment Often, as you say the old chest type suffer badly from pooling of cold air at the bottom of the compartment whilst simultaniously door opening will stir warm air into the top level. The result is that you have air warmer than 8C at the top and colder than 2C at the bottom making it impossible for the control system to know which way to turn - no wonder these units have a reputation for poor temperature control. The other factor that plays a part here is the common practice of mounting the compressors under the refrigerator cabinet. This looks nice and tidy but the compressor and it's components get very hot. This is like putting a fire under a cooking pot - couldn't be designed better for heating the compartment! This might also help to explain why the lower sections of this device are warmer than you'd expect. I'd be very interested to see the data you have - could you send me a copy to me. Thanks Ian

Hi Ian, I can send you the data, let me have your e-mail. I would like to share the data with everybody, but I'm not able to attach the graph to this message. best soren

Soren-- I attached it to your post yesterday and it is on the forum.

Great, thank you

welcome sir Holla

Dear Parveen, I have sent the details to your e-mail best soren 04072011-1120_technet-ILR.docx