The Operations Research / Management Science Blog

In 2007, an estimated 33.2 million people suffered from AIDS worldwide. Approximately 95 percent of those patients lived in developing countries, where resources for treatment are usually very limited. Therefore, efficient allocation of those resources had become critical in fighting the pandemic.

In their recent publication, Dr. Wei Xiong, instructor in public health at Weill Cornell Medical College, and Dr. Nathaniel Hupert, associate professor of public health at Weill Cornell Medical College and associate attending physician at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, showed how mathematical modeling approaches from Operations Research (OR) can be used to increase the efficiency of allocating limited resources, such as antiretroviral drugs and medical personnel, for HIV treatment.

“Operations Research offers a powerful set of tools that have been used successfully in everything from World War II to Wal-Mart-style logistics planning. These tools ought to be used to increase the success of existing programs and to help expand access to HIV care and treatment in resource-limited countries,” says Dr. Wei Xiong. “For example, Operations Research could help with the planning of a national drug distribution system, or with predicting the demand for services at local clinics and the best ways to staff them.”

“To date, HIV treatment scale-up has appropriately focused first on policy-level issues, such as program initiation and costs, and secondarily on operational-level issues,” adds Dr. Nathaniel Hupert. “Now that many programs are in place, the potential gains from improved planning are great, especially given the high cost of antiretroviral drug therapy.”

In addition to antiretroviral drug distribution, the shortage of competent health-care workers to diagnose and treat the millions of HIV patients in resource-limited countries poses another challenge. A number of computer simulations were done by the researchers to forecast the amount of physician person-hours saved by reassigning some duties to nurses for HIV clinics in Rwanda. Based on the results, it was suggested that if this type of task-shifting was scaled up from three health centers to the national level, the demand on public-sector physicians for HIV treatment could be reduced by up to 78 percent. Consequently, HIV treatment could be scaled up without overburdening the existing heal-care systems in resource-limited countries.

Furthermore, the management of laboratory resources can also be optimized through the application of Operations Research. Usually a large amount of time is spent on getting replacements or repairing when there is an equipment breakdown in HIV clinics. With the help of Operations Research, the outcomes of various scenarios of equipment management can be evaluated and the best approach could be determined without any unwanted impacts on the patients.

“While laudable progress has been made, the great majority of HIV patients are still under-treated or untreated,” says Dr. Hupert. “We feel that Operations Research provides one of the tools to make sure progress continues.”

Reference
“Operations Research Promises Continued Gains for HIV Treatment in Resource-Limited Countries”, Newswise, Aug 22, 2008