Original Article

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Blood Res 2013; 48(3):

Published online September 25, 2013

https://doi.org/10.5045/br.2013.48.3.193

© The Korean Society of Hematology

Mean cell volumes of neutrophils and monocytes are promising markers of sepsis in elderly patients

A-Jin Lee, and Sang-Gyung Kim*

Department of Laboratory Medicine, Catholic University of Daegu, School of Medicine, Daegu, Korea.

Correspondence to : Correspondence to Sang-Gyung Kim, M.D., Ph.D. Department of Laboratory Medicine, Catholic University of Daegu, School of Medicine, 17-33, Duryugonwon-ro, Nam-gu, Daegu 705-718, Korea. Tel: +82-53-650-4145, Fax: +82-53-653-8672, sgkim@cu.ac.kr

Received: March 26, 2013; Revised: May 31, 2013; Accepted: July 12, 2013

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background

Sepsis in elderly patients is a major cause of morbidity and mortality in the clinical setting. The aim of this study was to assess the diagnostic significance of volume conductivity scatter (VCS) parameters and to compare their reliability with that of inflammatory markers.

Methods

Patients (N=85) were divided into 3 groups according to their clinical history and culture results: control (N=29), localized infection (N=38), and sepsis (N=18). VCS parameters were obtained using a UniCel DxH 800 Coulter system. Cut-off values were established based on receiver operator characteristic (ROC) curves.

Results

The mean volumes of neutrophils (MNV) and monocytes (MMV) were higher in the sepsis group than in the localized infection and control groups (P=0.000 for both). The mean cell conductivity and low median angle light scatter of neutrophils were lower in the sepsis group than in the localized infection and control groups (P=0.029 and P=0.022, respectively). With a cut-off of 156.5, MNV had a sensitivity of 83.3% and a specificity of 78% in predicting sepsis.

Conclusion

MNV and MMV, which can be obtained easily using an automated blood analyzer, may be promising hematologic parameters for distinguishing elderly individuals with and without sepsis and may help clinicians in the diagnosis of sepsis.

Keywords Volume of neutrophils, Volume of monocytes, VCS technology, Procalcitonin, Sepsis

Article

Original Article

Blood Res 2013; 48(3): 193-197

Published online September 25, 2013 https://doi.org/10.5045/br.2013.48.3.193

Copyright © The Korean Society of Hematology.

Mean cell volumes of neutrophils and monocytes are promising markers of sepsis in elderly patients

A-Jin Lee, and Sang-Gyung Kim*

Department of Laboratory Medicine, Catholic University of Daegu, School of Medicine, Daegu, Korea.

Correspondence to: Correspondence to Sang-Gyung Kim, M.D., Ph.D. Department of Laboratory Medicine, Catholic University of Daegu, School of Medicine, 17-33, Duryugonwon-ro, Nam-gu, Daegu 705-718, Korea. Tel: +82-53-650-4145, Fax: +82-53-653-8672, sgkim@cu.ac.kr

Received: March 26, 2013; Revised: May 31, 2013; Accepted: July 12, 2013

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background

Sepsis in elderly patients is a major cause of morbidity and mortality in the clinical setting. The aim of this study was to assess the diagnostic significance of volume conductivity scatter (VCS) parameters and to compare their reliability with that of inflammatory markers.

Methods

Patients (N=85) were divided into 3 groups according to their clinical history and culture results: control (N=29), localized infection (N=38), and sepsis (N=18). VCS parameters were obtained using a UniCel DxH 800 Coulter system. Cut-off values were established based on receiver operator characteristic (ROC) curves.

Results

The mean volumes of neutrophils (MNV) and monocytes (MMV) were higher in the sepsis group than in the localized infection and control groups (P=0.000 for both). The mean cell conductivity and low median angle light scatter of neutrophils were lower in the sepsis group than in the localized infection and control groups (P=0.029 and P=0.022, respectively). With a cut-off of 156.5, MNV had a sensitivity of 83.3% and a specificity of 78% in predicting sepsis.

Conclusion

MNV and MMV, which can be obtained easily using an automated blood analyzer, may be promising hematologic parameters for distinguishing elderly individuals with and without sepsis and may help clinicians in the diagnosis of sepsis.

Keywords: Volume of neutrophils, Volume of monocytes, VCS technology, Procalcitonin, Sepsis

Fig 1.

Figure 1.

Receiver Operator Characteristic (ROC) curves (with area under the ROC curve) of inflammatory markers (mean neutrophil volume [MNV], mean monocyte volume [MMV], and C-reactive protein [CRP]) and procalcitonin.

Blood Research 2013; 48: 193-197https://doi.org/10.5045/br.2013.48.3.193

Table 1 . Characteristics, parameters of infection and inflammation, and VCS parameters..

a)P value<0.05 (ANOVA with post hoc analysis) was considered statistically significant..

Abbreviations: CRP, C-reactive protein; VCS, volume conductivity scatter; MALS, median angle light scatter; UMALS, upper median angle light scatter; LMALS, lower median angle light scatter; LALS, low angle light scatter..


Table 2 . Sensitivity and specificity at the designated cut-off values of inflammatory markers for predicting sepsis..

Abbreviations: MNV, mean cell volume of neutrophils; MMV, mean cell volume of monocytes; CRP, C-reactive protein..


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