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• W2601565514 abstract "6622 Background: Allogeneic granulocyte transfusion therapy is sometimes the only therapeutic option in immunocompromised neutropenic leukemic/HSCT patients with life threatening bacterial and fungal infections. Collection of larger cell doses of granulocyte concentrates (GC) by automated apheresis following G-CSF/steroids administration has renewed interest and its use has grown steadily. Methods: Donors were recruited from family/friends of the patients and informed consent was obtained. GCs were collected via donor stimulation with a single subcutaneous dose of G-CSF (600 mcg). First time donors received an oral dose of dexamethasone (8 mg). GCs were harvested by Hetastarch-assisted leukapheresis 12 hours later via peripheral venous access with the continuous flow cell separator Spectra (COBE Caridian BCT, Lakewood, CO). Results: GCs were collected from 93 donors (67M: 26F; age median 40 (19-73 years) and 1 ½ x blood volume processed median 7048 (3212-8085 mL). The pre/post wbc were median 8.1 (4.1-22.8)/ 42.7 (22.4-77.5). The volume collected was based on the post G-CSF wbc count (> 35 K/UL - 800 mL; <35 K/UL between 600-700 mL). The original yield (10 x10e) was median 9.7 (5.1-17.2 units), volume median 718 (538-860 mL) and WBC median 132.7 (84.2 -241.6 K/UL per bag). The Split GCs were median 4.48 (2.70-7.72 units), with neutrophils median 87% (54-97% per bag). GCs were transfused to 51 patients (31M: 20F; age median 58 [19-83 years]) who received median 3.5 (1-18 split units), containing wbcs median 10734.69 [5778-42 -162698.09 (x10^3/uL)/unit) and achieved a WBC increment median 0.2 (0.0-8.3K/UL). Conclusions: The GCs were split due to the primary care team's reluctance to transfuse the entire volume of the product due to volume restrictions or for some other medical reason. The same rationale to split platelets from high yield single apheresis was used to split our GC products. We found that GCs from each donor was utilized maximally and also brought partial relief to other patients who lacked donors. We would like to make the case that when adequate numbers of GCs are collected it may be feasible to split the unit. This may offer a glimmer of hope to other patients in need of GCs who lack a donor network support." @default.
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• W2601565514 date "2012-05-20" @default.
• W2601565514 modified "2023-09-27" @default.
• W2601565514 title "Use of granulocytes concentrates from a single high yield apheresis to support more than one patient." @default.
• W2601565514 doi "https://doi.org/10.1200/jco.2012.30.15_suppl.6622" @default.
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