title: Recovery of Platelet Count among Apheresis Platelet Donors.
abstract: BACKGROUND
  Increase in awareness regarding use of single donor platelets and the availability of technology has resulted in increased platelet pheresis procedures. The interval between two succesive plateletpheresis donations is much less compared to whole blood donations. Plateletpheresis procedures are associated with short term and long term adverse events. The effect of plateletpheresis on haematopoietic system remains significant.
  
  
  OBJECTIVE
  To study the recovery of platelet count to baseline in plateletpheresis donors.
  
  
  METHODS
  Fifty, first time apheresis donors were followed for platelet count recovery. Platelet count was measured before donation and at 30 minutes, 48 hours, 7thday and 14thday post-donation. Donor platelet count recovery to baseline was observed during the two week period. Results were analysed statistically, p<0.05 was considered statistically significant.
  
  
  RESULTS
  Platelet count recovered to baseline by 7thday post-donation in 50% of donors in groups I (Pre-donation platelet count 1.5 lacs/μl to 2.2 lacs/μl) and II (Donors with platelet count >2.2 lacs/μl to 2.75 lacs/μl), 30% of donors in group III (Donors with platelet count >2.75 lacs/μl to 3.5 lacs/μl) of the donors. Donor's platelet count recovered to baseline in 85% of donors by day 14 in across the three groups. Recruitment of platelets from spleen was observed in donors with pre-donation platelet count on the lower limit of normal.
  
  
  CONCLUSIONS
  By day 7, donor's platelet count recovered to baseline in majority of the donors. Allowing enough recovery periods for donor platelet count, the minimum interval between two apheresis donations can be 7 days till more prospective studies conclude on the frequency and minimum interval between plateletpheresis donations.
authors.affiliation: Assistant Professor, Department of Transfusion Medicine, Sri Ramachandra Medical College and Research Institute , Chennai, India .
authors.forename: Ravindra Prasad
authors.initials: RP
authors.lastname: Thokala
authors.affiliation: Associate Professor, Department of Transfusion Medicine, Sri Ramachandra Medical College and Research Institute , Chennai, India .
authors.forename: Krishnamoorthy
authors.initials: K
authors.lastname: Radhakrishnan
authors.affiliation: Senior Resident, Department of Transfusion Medicine, Sri Ramachandra Medical College and Research Institute , Chennai, India .
authors.forename: Ashwin
authors.initials: A
authors.lastname: Anandan
authors.affiliation: Professor, Department of Transfusion Medicine, Sri Ramachandra Medical College and Research Institute , Chennai, India .
authors.forename: Vinod Kumar
authors.initials: VK
authors.lastname: Panicker
keywords: Haematopoietic system; Plateletpheresis; Single donor platelets