Getting to Know Immune Globulin Michelle Vogel, MPA, & Linda Kobert, RN, MSN
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mmune globulin (Ig) is a sterile solution containing human antibodies. It is prepared from plasma collected from thousands of donors and is used to treat inflammation and prevent infection. It can be administered through a vein (intravenously or IV) or under the skin (subcutaneously or SC). It takes approximately 250 plasma donations to treat one patient with pemphigus or pemphigoid (P/P) for one year. Different manufacturers produce different brands of immune globulin, but every brand relies on plasma collected from specialized plasma donation centers. Donations made at hospitals or through the American Red Cross are not used to produce Ig and other plasma protein therapies.
Are we in danger of a shortage?
The simple answer is yes. In 2019, many sites of care (hospital outpatient infusion centers, physician infusion suites, and home infusions) reported having problems getting access to certain brands of Ig. Policies were enacted to ration Ig use, with priority given to primary immunodeficiency patients and transplant patients. The Ig supply is currently recovering from the 2019 shortage, but a new threat due to the COVID-19 pandemic is now affecting this recovery and could lead to another shortage. When COVID-19 social distancing restrictions were enacted, people stopped donating plasma because they were staying home. As a result, according to industry experts, plasma donations in the United States are down more than 30 percent in recent months. Even as the country reopens, plasma donations have not returned to the levels needed to prevent a serious shortage of Ig by the end of this year. Past Ig shortages were a result of many things, including regulatory problems, issues with manufacturing, reimbursement challenges, and distribution obstacles. However, the current situation is simply the result of a lack of plasma. We can prevent this shortage
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from happening, but we need to work together to increase the plasma supply.
What is the donation process like?
The plasma donation process begins with healthy volunteers who must meet strict health requirements. Detailed questionnaires, a physical examination, and a blood test are administered to identify any factors that may make the donor ineligible. These extensive safety measures are designed to protect both donors and plasma product recipients and to ensure the safety of all plasma protein therapies. The donation process involves a procedure called plasmapheresis in which whole blood is removed through a needle in the arm. The blood is pumped through a machine that filters out the red blood cells and platelets and returns these to the donor, reserving the plasma. An individual’s body replenishes its plasma supply within 24 to 48 hours, so those who donate plasma can give up to twice a week. (Blood can only be donated once every 56 days, because it takes much longer to replenish red blood cells.) All initial donations are placed on hold until the donor returns to provide a second donation within six months. If the donor does not return, that initial donation is discarded. The second and subsequent donations allow for additional health screenings and testing. Subsequent donations also demonstrate the donor’s ongoing commitment to plasma donation, which is important to maintain the supply. All plasma donations are held for 60 days after collection. During this period, samples are tested at several stages for viruses. The testing methods can detect levels of viruses—including COVID-19—at an early stage, even before a person has developed symptoms. Over the years, this technology has dramatically improved the quality and safety of the plasma supply.
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