Journal of Hematology, ISSN 1927-1212 print, 1927-1220 online, Open Access
Article copyright, the authors; Journal compilation copyright, J Hematol and Elmer Press Inc
Journal website https://jh.elmerpub.com

Original Article

Volume 13, Number 6, December 2024, pages 261-267

Optimizing Falling Drop Hemoglobin Method by Comparing Capillary Versus Venous Blood and Determining the Stability of the Copper Sulfate Solution

Figures

↓  Figure 1. Components of the falling drop hemoglobin method, showing only one glass column.
Figure 1.
↓  Figure 2. Linear regression of blood droplet descent time compared over trials spaced 1 week apart.
Figure 2.

Tables

↓  Table 1. Comparison of Capillary and Venous Blood in the Falling Drop Hemoglobin Method
 
Collection method Number of trials (n) Average Hct (%) Average time (s) Intra-run SD (s) Inter-run SD (s)
SD: standard deviation; Hct: hematocrit.
Capillary 4 19.75 42.50 4.09 3.03
Venous 4 25.50 38.20 3.32 2.46

 

↓  Table 2. Copper Sulfate Stability Testing
 
Freshly prepared solution Room temperature solution Solution incubated at 37.7 °C
Average descent time (s) 38.5 37.0 37.6
Average standard deviation of descent time (s) 3.840094 3.064603 4.197985
Range of descent time (s) 7.1 8.0 8.7