INTERPRETATION OF THE RESULTS OF IMMUNOHEMATOLOGICAL TESTS IN HEMATOLOGICAL PATIENTS

2019 ◽  
Vol 64 (4) ◽  
pp. 221-224
Author(s):  
A. V. Yovdiy ◽  
E. V. Butina ◽  
E. A. Poponina ◽  
G. A. Zaitseva ◽  
N. V. Minaeva
Keyword(s):  
Red Blood Cells ◽  
Blood Cells ◽  
Blood Components ◽  
Blood Types ◽  
Hematological Patients ◽  
Correct Determination ◽  
Double Population ◽  
Transfusion Complications ◽  
Selection Of

The correct determination of the blood types of the recipient and the donor is very importante for the choice of blood components for transfusion. As a result of the study, it was established that 18.0% of patients, admitted to the hematology clinic, have difficulties in interpreting of the results of immunohematological tests. Most often, a double population of red blood cells was detected when determining antigens of the Rhesus system (10.9%), auto- (3.9%) and alloantibodies (2.8%). The proposed algorithm for the selection of donor red blood cells in difficult diagnostic cases helps to prevent the development of post-transfusion complications.

Measurement of hemoglobin oxygen saturation in capillaries

1987 ◽  
Vol 252 (5) ◽  
pp. H1031-H1040 ◽  
Author(s):  
M. L. Ellsworth ◽  
R. N. Pittman ◽  
C. G. Ellis
Keyword(s):  
Light Intensity ◽  
Oxygen Saturation ◽  
Red Blood Cells ◽  
Optical Density ◽  
Blood Cells ◽  
Striated Muscle ◽  
Cheek Pouch ◽  
Retractor Muscle ◽  
Hamster Cheek Pouch

We present a computer-aided videodensitometric method for the determination of oxygen saturation in red blood cells flowing through capillaries of the hamster cheek pouch retractor muscle. The optical density (OD) of red blood cells is determined at two wavelengths. At the first, 431 nm, there is a maximum difference between absorption by oxygen deoxyhemoglobin. At the second, 420 nm, absorption is equal for the two absorbing species (isosbestic wavelength). In capillaries of the retractor muscle a relationship between oxygen saturation (S) and the following OD ratio was obtained as S = -1.71 (OD431/OD420) + 2.20. The error (95% confidence interval) in oxygen saturation associated with a determination of the OD ratio is estimated to be +/- 4.8%. The computerization of the method employs a frame-by-frame analysis of the light intensity over a selected capillary segment. The light intensity waveform along the segment is digitized and the minimum (I) and maximum (I0) light intensities are used to compute an optical density (OD = log10 [I0/I]). These minimum and maximum intensities correspond to the presence and absence of a red blood cell, respectively. The method permits the off-line analysis of videotaped scenes and provides a means of assessing the extent of temporal and spatial heterogeneity of oxygen saturation in selected capillary networks. The method has been developed for use in capillaries in transilluminated striated muscle but should be generally applicable to the measurement of capillary oxygen saturation in other tissues.

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