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Mohnke K, Smetiprach J, Paumen Y, Mildenberger P, Komorek Y, Griemert EV, Wittenmeier E. Is noninvasive hemoglobin measurement suitable for children undergoing preoperative anesthesia consultation? J Clin Monit Comput 2024:10.1007/s10877-024-01194-7. [PMID: 39031232 DOI: 10.1007/s10877-024-01194-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Accepted: 07/04/2024] [Indexed: 07/22/2024]
Abstract
Preoperative anemia in children is a significant clinical concern requiring precise diagnosis. Although traditional blood sample collection is effective, it poses challenges because of children's aversion and technical difficulties. Therefore, this study explores the suitability of noninvasive hemoglobin measurements in children during preoperative anesthesia consultation. Noninvasive hemoglobin measurement (SpHb®; Masimo) in children aged ≤ 17 years was performed during preoperative anesthesia consultation and compared with laboratory hemoglobin (labHb) levels. SpHb was measured in 62 children (median age: 6 years, standard deviation [SD] ± 5.3) without adverse effects but was unsuccessful in one child. The bias, limits of agreement, and root mean square error between SpHb and labHb were 0.3, -2.26- +2.8, and 1.3 g/dl, respectively. LabHb demonstrated a significant regression relationship with R2 of 0.359. LabHb was associated with a negative effect on bias [- 0.443 (CI 95: - 0.591- - 0.153, P < 0.001)], i.e., SpHb tends to underestimate labHb for high labHb values. The retest reliability between two consecutive SpHb measurements was 0.727 (P < 0.001). Double measurement of SpHb, age, weight, sex, heart rate, and perfusion index had no significant effects on accuracy. Using SpHb, a specificity of 96.3% (95% confidence interval [CI 95]: 87.3%-99.5%) and a sensitivity of 57.1% (CI 95: 18.4%-90.1%) were observed. Based on adapted cut-off values for SpHb (age-dependent cut-off values plus 0.8 g/dl), a sensitivity of 100% (CI 95: 64.6%-100%) was achieved for the investigated study collective. SpHb measurement in children is a quick procedure. The accuracy of hemoglobin measurement is insufficient for the diagnosis of anemia. Thus, whether the calculated cut-off SpHb values of this study collective can be considered for anemia screening in pediatric patients undergoing preoperative anesthesia consultation should be confirmed. Trial registration number and date of registration: This prospective study was registered at ClinicalTrials.gov (NCT03586141).
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Affiliation(s)
- Katja Mohnke
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Julia Smetiprach
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Yuri Paumen
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Philipp Mildenberger
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Yannick Komorek
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Eva-Verena Griemert
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Eva Wittenmeier
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.
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Zhao L, Vidwans A, Bearnot CJ, Rayner J, Lin T, Baird J, Suner S, Jay GD. Prediction of anemia in real-time using a smartphone camera processing conjunctival images. PLoS One 2024; 19:e0302883. [PMID: 38739605 PMCID: PMC11090304 DOI: 10.1371/journal.pone.0302883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 04/15/2024] [Indexed: 05/16/2024] Open
Abstract
Anemia is defined as a low hemoglobin (Hb) concentration and is highly prevalent worldwide. We report on the performance of a smartphone application (app) that records images in RAW format of the palpebral conjunctivae and estimates Hb concentration by relying upon computation of the tissue surface high hue ratio. Images of bilateral conjunctivae were obtained prospectively from a convenience sample of 435 Emergency Department patients using a dedicated smartphone. A previous computer-based and validated derivation data set associating estimated conjunctival Hb (HBc) and the actual laboratory-determined Hb (HBl) was used in deriving Hb estimations using a self-contained mobile app. Accuracy of HBc was 75.4% (95% CI 71.3, 79.4%) for all categories of anemia, and Bland-Altman plot analysis showed a bias of 0.10 and limits of agreement (LOA) of (-4.73, 4.93 g/dL). Analysis of HBc estimation accuracy around different anemia thresholds showed that AUC was maximized at transfusion thresholds of 7 and 9 g/dL which showed AUC values of 0.92 and 0.90 respectively. We found that the app is sufficiently accurate for detecting severe anemia and shows promise as a population-sourced screening platform or as a non-invasive point-of-care anemia classifier.
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Affiliation(s)
- Leon Zhao
- The Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States of America
| | - Alisa Vidwans
- Rhode Island Hospital, Providence, Rhode Island, United States of America
| | - Courtney J. Bearnot
- The Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States of America
| | - James Rayner
- The Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States of America
| | - Timmy Lin
- The Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States of America
| | - Janette Baird
- The Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States of America
| | - Selim Suner
- The Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States of America
| | - Gregory D. Jay
- The Warren Alpert Medical School, Brown University, Providence, Rhode Island, United States of America
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Das Mahapatra PP, Roy C, Agarwal K, Banerjee J, Sharma S. Performance of the non-invasive point-of-care device, EzeCheck, for haemoglobin assessment in adults and children in community and institutional care settings. PLOS DIGITAL HEALTH 2024; 3:e0000500. [PMID: 38717987 PMCID: PMC11078411 DOI: 10.1371/journal.pdig.0000500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 03/31/2024] [Indexed: 05/12/2024]
Abstract
Anaemia is a major public health problem, especially in resource constrained settings. Dependency on assessment of blood hemoglobin (Hgb) concentration impedes anemia detection, risk stratification and intervention. Thus, valid, frugal and scalable technologies are needed. EzeCheck is a noninvasive portable device developed in India for predicting hemoglobin levels in human beings aged 4 years and above using a finger-tip biosensor. In this assessment, we aimed to: (i) evaluate EzeCheck's performance with an automated whole blood hemato-analyzer (Sysmex XN 1000) as the gold standard, and (ii) estimate EzeCheck's agreement with Sahli's method and HemoCue (Hb-301) in real-world primary and higher care facilities. Paired assessments were done at five sites across India i.e., Bhubaneshwar, Shimla, Solan and Mashobra and Ulhasnagar. Participants across all age groups (4 years and above) were assessed. We used a range of statistical tests to evaluate the performance of EzeCheck. It was found that EzeCheck performed well across age and gender categories with convincing validity, concordance, precision and accuracy, and acceptable bias. While comparing EzeCheck with Hemato-analyzer, no statistically significant systematic bias was found. However, EzeCheck showed significant systematic bias when compared to Sahli's method and HemoCue. We concluded that EzeCheck could detect anemia (as per WHO Hgb cut-offs) in 'real-world settings' and 'across age and gender categories', with high sensitivity, specificity and accuracy, and can serve as a replacement to traditional methods of hemoglobin assessment. Further, for countries with higher prevalence of anemia where universal screening may be mandated, the positive predictive value of EzeCheck will be higher. The likelihood ratios also indicated that the device had moderate-to-good utility. EzeCheck is suitable for embedment into program and out-patient health care settings in resource constrained contexts as a spot-check hemoglobinometer.
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Affiliation(s)
| | - Chaitali Roy
- EzeRx Health Tech Pvt. Ltd, Bhubaneswar, Odisha, India
| | - Komal Agarwal
- EzeRx Health Tech Pvt. Ltd, Bhubaneswar, Odisha, India
| | - Joy Banerjee
- EzeRx Health Tech Pvt. Ltd, Bhubaneswar, Odisha, India
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Seekircher L, Siller A, Amato M, Tschiderer L, Balog A, Astl M, Schennach H, Willeit P. HemoCue Hb-801 Provides More Accurate Hemoglobin Assessment in Blood Donors Than OrSense NBM-200. Transfus Med Rev 2024; 38:150826. [PMID: 38581862 DOI: 10.1016/j.tmrv.2024.150826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/11/2024] [Accepted: 03/14/2024] [Indexed: 04/08/2024]
Abstract
Hemoglobin levels are commonly assessed to prevent causing or worsening of anemia in prospective blood donors. We compared head-to-head the accuracy of different technologies for measuring hemoglobin suitable for use in mobile donation units. We included 144 persons donating platelets at the Central Institute for Blood Transfusion and Immunology in Innsbruck, Austria. Hemoglobin levels were measured in venous blood using the portable hemoglobinometer HemoCue Hb-801 and noninvasively using OrSense NBM-200, and compared to values obtained with the Sysmex XN-430, an automated hematology analyzer employing the sodium lauryl sulphate method, which is broadly used as reference method in everyday clinical practice. Mean age of participants was 34.2 years (SD 13.0); 34.0% were female. Hemoglobin values measured with HemoCue were more strongly correlated with the Sysmex XN-430 (r = 0.90 [95% CI: 0.87-0.93]) than measured with OrSense (r = 0.49 [0.35-0.60]). On average, HemoCue overestimated hemoglobin by 0.40 g/dL (0.31-0.48) and OrSense by 0.75 g/dL (95% CI: 0.54-0.96). When using OrSense, we found evidence for higher overestimation at higher hemoglobin levels (proportional bias) specifically in females but not in males (Pdifference = .003). Sensitivity and specificity for classifying donors according to the hemoglobin donation thresholds were 99.2% (95% CI: 95.3%-100.0%) and 43.8% (23.1%-66.8%) for HemoCue vs 95.3% (89.9%-98.0%) and 12.5% (2.2%-37.3%) for OrSense. Areas under the receiver operating characteristic curves were higher using HemoCue vs OrSense both in females (0.933 vs 0.547; P = .044) and males (0.948 vs 0.628; P < .001). HemoCue Hb-801 measures hemoglobin more accurately than OrSense NBM-200 in the setting of mobile blood donation units. Our findings are particularly relevant for females, having in mind that anemia is more prevalent in females than in males.
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Affiliation(s)
- Lisa Seekircher
- Department of Medical Statistics, Informatics, and Health Economics, Medical University of Innsbruck, Innsbruck, Austria
| | - Anita Siller
- Central Institute for Blood Transfusion and Immunology, University Hospital of Innsbruck, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Marco Amato
- Central Institute for Blood Transfusion and Immunology, University Hospital of Innsbruck, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Lena Tschiderer
- Department of Medical Statistics, Informatics, and Health Economics, Medical University of Innsbruck, Innsbruck, Austria
| | - Agnes Balog
- Central Institute for Blood Transfusion and Immunology, University Hospital of Innsbruck, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Manfred Astl
- Central Institute for Blood Transfusion and Immunology, University Hospital of Innsbruck, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Harald Schennach
- Central Institute for Blood Transfusion and Immunology, University Hospital of Innsbruck, Tirol Kliniken GmbH, Innsbruck, Austria
| | - Peter Willeit
- Department of Medical Statistics, Informatics, and Health Economics, Medical University of Innsbruck, Innsbruck, Austria; Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK.
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Namaste SM, Baingana R, Brindle E. Hemoglobin measurement in venous blood compared with pooled and single-drop capillary blood: a method-comparison study in a controlled and survey setting in Uganda among children and women. Am J Clin Nutr 2024; 119:949-959. [PMID: 38176682 DOI: 10.1016/j.ajcnut.2023.12.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 12/03/2023] [Accepted: 12/28/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND Standard practice for estimating anemia in population-based surveys is to use a point-of-care device to measure hemoglobin (Hb) in a single drop of capillary blood. Emerging evidence points to larger than expected differences in Hb concentration depending on the blood source. OBJECTIVE We evaluated use of different blood sources to measure Hb with a HemoCue 201+ analyzer compared with the reference method of venous blood tested with a Sysmex XN-450 hematology analyzer. METHODS Hb concentration in venous, pooled capillary, and single-drop capillary blood were collected in controlled (laboratory) and survey (Demographic Health Survey-8 pilot) settings in Uganda among children 6-59 mo and nonpregnant women 15-49 y. Venous and capillary blood collected from the same individual was tested using a HemoCue 201+ analyzer and the venous blood was also measured with a Sysmex XN-450 hematology analyzer. Agreement between measures was estimated using Lin's concordance correlation coefficient, Bland-Altman plots, and Deming regression. Means and prevalences were compared using paired t-tests and McNemar's tests, respectively. RESULTS The limits of agreement between Hb measured using a HemoCue 201+ analyzer and the reference method were lowest for venous (1.1-1.96 g/dL), followed by pooled capillary (1.45-2.27 g/dL), and single-drop capillary blood (2.23-3.41 g/dL). Mean differences were <0.5 g/dL across comparators. There were statistically significant differences in Hb concentration from both types of capillary blood. Anemia prevalence was lower in pooled capillary blood compared with the reference method. CONCLUSIONS The variability of Hb measured by capillary blood using the HemoCue 201+ analyzer is higher than venous blood but the extent to which this impacts the validity of Hb and anemia estimates requires further exploration. Future research is also needed to evaluate the implications of using venous compared with capillary blood in population-based surveys. This trial was registered at clinicaltrials.gov (NCT05059457).
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Affiliation(s)
| | - Rhona Baingana
- Makerere University College of Natural Sciences, Kampala, Uganda, Africa
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Channa Basappa Y, Majgi SM, Shashidhar SB, Srinivas PN. Validation of ToucHb, a non-invasive haemoglobin estimation: Effective for normal ranges, needs improvement for anaemia detection. PLOS GLOBAL PUBLIC HEALTH 2024; 4:e0001541. [PMID: 38470938 PMCID: PMC10931486 DOI: 10.1371/journal.pgph.0001541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 02/12/2024] [Indexed: 03/14/2024]
Abstract
Non-invasive methods for haemoglobin estimation hold enormous potential for early detection and treatment of anaemia, especially in limited resource settings. We sought to validate the diagnostic accuracy of ToucHb, a non-invasive haemoglobin estimation device available in the Indian market. We prospectively evaluated the diagnostic performance of the ToucHb device using the Automated complete blood count (CBC) method as the gold standard. Persons referred for haemoglobin estimation to the central laboratory of the government medical college hospital in Mysore, southern India were included in the study. Out Of 140 people approached, 127 gave consent; 65% (n = 82) were female with median age of 37 (IQR 28-45). ToucHB reported median haemoglobin value of 14 g/dL compared to 13.3 g/dL for CBC. Within 1 g/dL and 2 g/dL of CBC, 55.2% (70/127) and 74% (94/127) of ToucHb haemoglobin observations fell, respectively. The Bland-Altman plot showed a mean difference of 3 g/dL in haemoglobin between ToucHb and CBC among those with anaemia. The ToucHb device showed 22.2% sensitivity and 94.5% specificity for anaemia detection. In rural resource-limited settings, point of care non-invasive devices such as ToucHb can improve access and acceptance for anaemia screening. However, ToucHb has showed low sensitivity for anaemia detection and low accuracy at lower haemoglobin values. The utility of the instrument is especially limited in detecting anaemia, while it can estimate haemoglobin accurately among those with haemoglobin is in the normal range. Based on these findings, ToucHb and devices that work on the core technology deployed in ToucHb may be better suited to monitor known haemoglobin level rather than in anaemia screening or detection in primary/ secondary care and community settings.
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Affiliation(s)
| | - Sumanth Mallikarjuna Majgi
- Department of Community Medicine, Mysore Medical College and Research Institute, Mysore, Karnataka, India
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Chen YY, Lai GH, Chen CT, Cheng HC, Tseng SH. Noninvasive hemoglobin quantification across different cohorts using a wearable diffuse reflectance spectroscopy system. BIOMEDICAL OPTICS EXPRESS 2024; 15:1739-1749. [PMID: 38495710 PMCID: PMC10942696 DOI: 10.1364/boe.517645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/09/2024] [Accepted: 02/09/2024] [Indexed: 03/19/2024]
Abstract
Quantifying hemoglobin is vital yet invasive through blood draws. We developed a wearable diffuse reflectance spectroscopy device comprising control and sensor boards with photodiodes and light-emitting diodes to noninvasively determine hemoglobin. Neural networks enabled recovery of optical parameters for chromophore fitting to calculate hemoglobin. Testing healthy and elderly subjects revealed strong correlation (r=0.9) between our system and invasive methods after data conversion. Bland-Altman analysis demonstrated tight 95% limits of agreement from -1.98 to 1.98 g/dL between the DRS and invasive hemoglobin concentrations. By spectroscopically isolating hemoglobin absorption, interference from melanin was overcome. Our device has the potential for future integration into wearable technology, enabling hemoglobin level tracking.
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Affiliation(s)
- Ying-Yu Chen
- Department of Photonics, National Cheng-Kung University, Tainan, Taiwan 701, Taiwan
| | - Guan-Hua Lai
- Department of Photonics, National Cheng-Kung University, Tainan, Taiwan 701, Taiwan
| | - Chia-Te Chen
- Department of Nursing, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsiu-Chi Cheng
- Department of Nursing, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of Internal Medicine, Tainan Hospital, Ministry of Health and Welfare, Tainan, Taiwan
| | - Sheng-Hao Tseng
- Department of Photonics, National Cheng-Kung University, Tainan, Taiwan 701, Taiwan
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan 807, Taiwan
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8
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Caulfield KC, McMahon O, Dennis AT. Baseline haemoglobin variability by measurement technique in pregnant people on the day of childbirth. Anaesthesia 2024; 79:178-185. [PMID: 37990621 DOI: 10.1111/anae.16174] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/10/2023] [Indexed: 11/23/2023]
Abstract
Point-of-care haemoglobin measurement devices may play an important role in the antenatal detection of anaemia in pregnant people and may be useful in guiding blood transfusion during resuscitation in obstetric haemorrhage. We compared baseline haemoglobin variability of venous and capillary HemoCue® haemoglobin, and Masimo® Rad-67 Pulse CO-Oximeter haemoglobin with laboratory haemoglobin in people on the day of their planned vaginal birth. A total of 180 people undergoing planned vaginal birth were enrolled in this prospective observational study. Laboratory haemoglobin was compared with HemoCue and Masimo Rad-67 Pulse CO-Oximeter measurements using Bland-Altman analysis, calculating mean difference (bias) and limits of agreement. Five (2.8%) people had anaemia (haemoglobin < 110 g.l-1 ). Laboratory haemoglobin and HemoCue venous haemoglobin comparison showed an acceptable bias (SD) 0.7 (7.54) g.l-1 (95%CI -0.43-1.79), with limits of agreement -14.10-15.46 g.l-1 and acceptable agreement range of 29.6 g.l-1 . Laboratory and HemoCue capillary haemoglobin comparison showed an unacceptable bias (SD) 13.3 (14.12) g.l-1 (95%CI 11.17-15.34), with limits of agreement - 14.42-40.93 g.l-1 and unacceptable agreement range of 55.3 g.l-1 . Laboratory and Masimo haemoglobin comparison showed an unacceptable bias (SD) -14.0 (11.15) g.l-1 (95%CI -15.63 to -12.34), with limits of agreement to -35.85 to 7.87 g.l-1 and acceptable agreement range of 43.7 g.l-1 . Venous HemoCue, with its acceptable bias and limits of agreement, should be applied more widely in the antenatal setting to detect, manage and risk stratify pregnant people with anaemia. HemoCue capillary measurement under-estimated haemoglobin and Masimo haemoglobin measurement over-estimated, limiting their clinical use. Serial studies are needed to determine if the accuracy of venous HemoCue haemoglobin measurement is sustained in other obstetric settings.
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Affiliation(s)
- K C Caulfield
- Department of Anaesthesia, University Hospital Waterford, Waterford, Ireland
| | - O McMahon
- Department of Anaesthesia, Leicester Royal Infirmary, Infirmary Square, Leicester, UK
| | - A T Dennis
- Division of Obstetric Anesthesia, Department of Anesthesiology, Perioperative Medicine and Pain Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
- Department of Anaesthesia, The Royal Women's Hospital Parkville, and the University of Melbourne, Department of Critical Care and Obstetrics, Gynaecology and Newborn Health, Melbourne, Australia
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Sahoo KC, Sinha A, Sahoo RK, Suman SS, Bhattacharya D, Pati S. Diagnostic Validation and Feasibility of a Non-invasive Haemoglobin Screening Device (EzeCheck) for 'Anaemia Mukt Bharat' in India. Cureus 2024; 16:e52877. [PMID: 38406104 PMCID: PMC10894012 DOI: 10.7759/cureus.52877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/21/2024] [Indexed: 02/27/2024] Open
Abstract
Anaemia remains a major public health issue in India despite several efforts. It is crucial to introduce technology-based innovations for the mass screening and early diagnosis of anaemia. Traditional anaemia screening requires drawing blood and laboratory analysis and can be logistically expensive in resource-constrained settings. A non-invasive haemoglobin test for mass screening in such settings is vital which can quickly and efficiently screen large populations. This study validated the haemoglobin estimation between the invasive haematology analyzer and the non-invasive EzeCheck (EzeRx Health Tech Pvt. Ltd., Bhubaneswar, Odisha, India) in the community setting. We conducted a cross-sectional study among 416 urban slum members in Bhubaneswar, India. We used inter-rater reliability (kappa statistic) of haemoglobin estimation between the haematology analyzer and EzeCheck devices. The finding showed a moderate agreement between both devices (kappa=0.4221). Between both devices, 91.59% of the results were with +/-1.5 difference; 43.51%, no difference; 33.65%, less than one difference; and 14.42%, +/-1 to +/-1.5 difference of haemoglobin estimation. There was no significant difference in overall anaemia status estimates between the devices. Mass screening in schools and communities with non-invasive haemoglobin tests can help identify anaemic people for early diagnosis and bring patients for timely treatment, which can be used in remote areas to support 'Anaemia Mukt Bharat'.
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Affiliation(s)
- Krushna Chandra Sahoo
- Public Health, Health Technology Assessment in India, Indian Council of Medical Research (ICMR) - Regional Medical Research Centre (RMRC), Bhubaneswar, IND
| | - Abhinav Sinha
- Public Health, Health Technology Assessment in India, Indian Council of Medical Research (ICMR) - Regional Medical Research Centre (RMRC), Bhubaneswar, IND
| | - Rakesh Kumar Sahoo
- Public Health, Health Technology Assessment in India, Indian Council of Medical Research (ICMR) - Regional Medical Research Centre (RMRC), Bhubaneswar, IND
| | - S Shradha Suman
- Public Health, Health Technology Assessment in India, Indian Council of Medical Research (ICMR) - Regional Medical Research Centre (RMRC), Bhubaneswar, IND
| | - Debdutta Bhattacharya
- Microbiology, Health Technology Assessment in India, Indian Council of Medical Research (ICMR) - Regional Medical Research Centre (RMRC), Bhubaneswar, IND
| | - Sanghamitra Pati
- Public Health, Health Technology Assessment in India, Indian Council of Medical Research (ICMR) - Regional Medical Research Centre (RMRC), Bhubaneswar, IND
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10
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Yassen K, Omer N, Alsahaf F, Al Amer F, Alhamad F, Alherz I, Bushehab A, Alniniya F, Alwabari M. Comparing Non-Invasive Spectrophotometry to Hematology Analysis for Hemoglobin Measurements in Sickle Cell Disease Patients. J Clin Med 2023; 12:7517. [PMID: 38137588 PMCID: PMC10744205 DOI: 10.3390/jcm12247517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 12/24/2023] Open
Abstract
Patients with sickle cell disease (SCD) require repeated blood sampling for hemoglobin (Hb) concentration measurements. The primary aim of this study was to compare non-invasive spectrophotometric hemoglobin (SpHb, g/dL) measurements to those taken via an automated hematology analyzer (Hb, g/dL) in patients with SCD visiting outpatient clinics and to investigate the correlations and agreements between both measurement techniques. Secondarily, we aimed to identify the SpHb cut-off concentration for the diagnosis of anemia and to monitor the effects of the pleth variability index (PVI, %) and perfusion index (PI) on SpHb measurements. The results gained from the examination of one hundred and fifty-eight patients indicated that the SpHb measurements overestimated the lab Hb concentrations, with a mean (SpHb-Hb) bias of 0.82 g/dL (SD 1.29). The SpHb measurements were positively correlated with the Hb measurements (Kendall's tau correlation (τ), n = 158, τ = 0.68, p < 0.001), with an intra-class correlation (ICC) of 0.67 and a 95% CI from 0.57 to 0.74 (p = 0.000). The SpHb cut-off concentration to diagnose anemia was 11.4 and 11.7 g/dL for males and females, respectively. SpHb sensitivity was low for males and females at 64.4% and 57.1%; however, the specificity was higher at 90.9% and 75%, with positive predictive values (PPVs) of 95.6 and 85.7, respectively. No correlation existed between SpHb measurements and the PVI (%) in contrast with a moderate correlation with the PI (r = 0.049, p = 0.54, and r = 0.36, p < 0.001, respectively). The mean PI was low at 2.52 ± 1.7. In conclusion, the SpHb measurements were consistently higher than the lab Hb concentrations, with a positive correlation. The sensitivity and precision of the SpHb measurements were lower than expected. However, the SpHb specificity and its positive predictive values (PPVs) indicated that it is less likely for a patient with a positive SpHb test result for anemia to be non-anemic. These results will allow SpHb measurement to play a role in excluding the presence of anemia. In light of the low PI values determined, the SpHb measurements were challenging to take and, thus, require further technological improvements.
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Affiliation(s)
- Khaled Yassen
- Anesthesia Unit, Surgery Department, College of Medicine, King Faisal University, Hofuf 31983, Al Ahsa, Saudi Arabia
| | - Nawal Omer
- Hereditary Blood Disease Center, Hofuf 36422, Al Ahsa, Saudi Arabia;
| | - Fatimah Alsahaf
- College of Medicine, King Faisal University, Hofuf 31983, Al Ahsa, Saudi Arabia; (F.A.); (F.A.A.); (F.A.); (M.A.)
| | - Fatima Al Amer
- College of Medicine, King Faisal University, Hofuf 31983, Al Ahsa, Saudi Arabia; (F.A.); (F.A.A.); (F.A.); (M.A.)
| | - Fatimah Alhamad
- College of Medicine, King Faisal University, Hofuf 31983, Al Ahsa, Saudi Arabia; (F.A.); (F.A.A.); (F.A.); (M.A.)
| | - Imran Alherz
- Anesthesia Department, King Fahad Hospital, Ministry of Health, Hofuf 36441, Al Ahsa, Saudi Arabia; (I.A.); (F.A.)
| | - Abdulaziz Bushehab
- Nursing Services, Hereditary Blood Disease Center, Hofuf 36422, Al Ahsa, Saudi Arabia;
| | - Fatma Alniniya
- Anesthesia Department, King Fahad Hospital, Ministry of Health, Hofuf 36441, Al Ahsa, Saudi Arabia; (I.A.); (F.A.)
| | - Maryam Alwabari
- College of Medicine, King Faisal University, Hofuf 31983, Al Ahsa, Saudi Arabia; (F.A.); (F.A.A.); (F.A.); (M.A.)
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11
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Delabaere A, Guerard M, Cahierc R, Bouvier D, Pereira B, Gallot D. Accuracy of a portable hemoglobinometer (HemoCue) to measure fetal hemoglobin values during in utero transfusion. J Matern Fetal Neonatal Med 2023; 36:2266092. [PMID: 37840223 DOI: 10.1080/14767058.2023.2266092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 09/27/2023] [Indexed: 10/17/2023]
Abstract
OBJECTIVES The current recommended treatment for severe fetal anemia is in utero transfusion (IUT). During this procedure, the evaluation of the necessary volume of transfused blood is based on regular measurement of fetal hemoglobin (FHb) concentration. The gold standard measurement is performed in the biology laboratory. A rapid medical test such as HemoCue® is an effective way to predict FHb concentration. It would reduce the time to obtain results and therefore the procedure duration. To evaluate the accuracy of HemoCue® to measure FHb during IUT, we compared Hb levels obtained by HemoCue® and by our biology laboratory. METHODS This retrospective study involved all pregnant women who had undergone an IUT in the university hospital of Clermont-Ferrand, France, during the period from 1 January 2010 to 6 June 2021. The FHb level was evaluated by two methods, a rapid medical test, HemoCue®, and a standard method in the biology laboratory. RESULTS We obtained 244 pairs of results from HemoCue® and our laboratory, of 90 IUT procedures. The correlation between the two sets of results was excellent, with Lin's concordance correlation coefficient of 0.979. However, we established that the measurements were not significantly modified by IUT number, puncture time, cause of fetal anemia, estimated fetal weight, gestational age, and delay between two IUT or middle cerebral artery peak systolic velocity values. CONCLUSION Our results allowed to extend the relevance of FHb measurements by HemoCue® during IUT.
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Affiliation(s)
- Amélie Delabaere
- Université Clermont Auvergne, CHU Clermont-Ferrand, CNRS, Institut Pascal, Clermont-Ferrand, France
- Department of Obstetrics and Gynecology, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Maeva Guerard
- Department of Obstetrics and Gynecology, CHU Clermont-Ferrand, Clermont-Ferrand, France
- Equipe "Translational approach to epithelial injury and repair", Université Clermont Auvergne, CNRS, Inserm, GReD, Clermont-Ferrand, France
| | - Romain Cahierc
- Université Clermont Auvergne, CHU Clermont-Ferrand, CNRS, Institut Pascal, Clermont-Ferrand, France
- Department of Obstetrics and Gynecology, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Damien Bouvier
- Equipe "Translational approach to epithelial injury and repair", Université Clermont Auvergne, CNRS, Inserm, GReD, Clermont-Ferrand, France
- Biochemistry and Molecular Biology Department, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Bruno Pereira
- University Hospital of Clermont-Ferrand, Biostatistics Unit, the Clinical Research and Innovation Direction, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Denis Gallot
- Department of Obstetrics and Gynecology, CHU Clermont-Ferrand, Clermont-Ferrand, France
- Equipe "Translational approach to epithelial injury and repair", Université Clermont Auvergne, CNRS, Inserm, GReD, Clermont-Ferrand, France
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12
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Williams AM, Brown KH, Allen LH, Dary O, Moorthy D, Suchdev PS. Improving Anemia Assessment in Clinical and Public Health Settings. J Nutr 2023; 153 Suppl 1:S29-S41. [PMID: 37778891 PMCID: PMC11002965 DOI: 10.1016/j.tjnut.2023.05.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 03/28/2023] [Accepted: 05/10/2023] [Indexed: 10/03/2023] Open
Abstract
We aim to provide a practical approach to assess anemia and its primary causes, both in clinical settings and in the context of public health programs. Anemia remains a global challenge; thus, to achieve goals for anemia reduction and assess progress, standardized approaches are required for the assessment of anemia and its causes. We first provide a brief review of how to assess anemia, based on hemoglobin concentrations and cutoffs that correspond to age, sex, and physiologic status. Next, we discuss how to assess the likely causes of anemia in different settings. The causes of anemia are classified as non-nutritional (for example, because of infection, inflammation, blood loss, or genetic disorders) or nutrition-specific (for example, because of deficiencies of iron, vitamin A, riboflavin, vitamin B12, or folate). There is an important overlap between these 2 categories, such as the increased likelihood of iron deficiency in the context of inflammation. Given the multifaceted nature of anemia etiology, we introduce a framework for anemia assessment based on the "ecology of anemia," which recognizes its many overlapping causes. This conceptual framework is meant to inform what data on anemia causes may need to be collected in population surveys. The framework has a supporting table with information on the diagnostic tests, biomarkers and proposed cutoffs, characteristics, and feasibility of collecting the myriad information that can help elucidate the anemia etiology. We also provide examples of how this framework can be applied to interpret the anemia risk factor data from population-based surveys that can inform decisions about context-specific interventions. Finally, we present research gaps and priorities related to anemia assessment.
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Affiliation(s)
- Anne M Williams
- Department of Human Nutrition, University of Otago, Dunedin, New Zealand; Nutrition Branch, Centers for Disease Control and Prevention, Atlanta, GA, United States; Emory University, Atlanta, GA, United States.
| | - Kenneth H Brown
- Department of Nutrition and Institute for Global Nutrition, University of California, Davis, CA, United States
| | - Lindsay H Allen
- United States Department of Agriculture, Agricultural Research Service Western Human Nutrition Research Center, Davis, CA, United States
| | - Omar Dary
- Division of Nutrition and Environmental Health, Office of Maternal and Child Health and Nutrition, Bureau for Global Health, United States Agency for International Development, Washington, DC, United States
| | | | - Parminder S Suchdev
- Nutrition Branch, Centers for Disease Control and Prevention, Atlanta, GA, United States; Emory University, Atlanta, GA, United States
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13
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Servaas S, de Vreede S, Smeets RL, Stroobants A, van Eijk LT, Malagon I, Slagt C. Validation of non-invasive point of care blood content analysis using the TensorTip™ MTX device: a method comparison study. Clin Chem Lab Med 2023; 61:1867-1874. [PMID: 37134309 DOI: 10.1515/cclm-2023-0113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 04/19/2023] [Indexed: 05/05/2023]
Abstract
OBJECTIVES The TensorTip™ MTX is a non-invasive device designed to determine several physiological parameters with additional analysis of haemoglobin, haematocrit and blood gas analysis by interpreting blood diffusion colour of the finger skin based on spectral analysis. The aim of our study was to investigate the accuracy and precision of the TensorTip MTX in a clinical setting in comparison with routine analysis of blood samples. METHODS Forty-six patients, scheduled for elective surgery, were enrolled in this study. Placement of an arterial catheter had to be part of the standard of care. Measurements were performed during the perioperative period. The measurements obtained with the TensorTip MTX were compared with the results of routine analysis of the blood samples as a reference using correlation, Bland-Altman analysis and mountain plots. RESULTS No significant correlation was present in the measurements. Measurement of haemoglobin with the TensorTip MTX had a mean bias of 0.4 mmol/L, haematocrit's bias was 3.0 %. Bias of partial pressure of carbon dioxide and oxygen was 3.6 and 66.6 mmHg, respectively. Calculated percentage errors were 48.2 , 48.9, 39.9 and 109.0 %. Proportional bias was present in all Bland-Altman analyses. Less than 95 % of the differences fell within the pre-set limits of allowable error. CONCLUSIONS Non-invasive blood content analysis with the TensorTip MTX device is not equivalent to and did not correlate sufficiently with conventional laboratory analysis. None of the parameters measured showed results within the limits of allowable error. Therefore, the use of the TensorTip MTX is not recommended for perioperative care.
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Affiliation(s)
- Sjoerd Servaas
- Department of Anaesthesiology, Pain and Palliative Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Silke de Vreede
- Department of Anaesthesiology, Pain and Palliative Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Ruben L Smeets
- Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - An Stroobants
- Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Lucas T van Eijk
- Department of Anaesthesiology, Pain and Palliative Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Ignacio Malagon
- Department of Anaesthesiology, Pain and Palliative Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Cornelis Slagt
- Department of Anaesthesiology, Pain and Palliative Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
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14
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Alwabari M, Alhamad F, Alsahaf F, Al Amer F, Alniniya F, Alherz I, Omer N, Bushehab A, Yassen K. Can Non-Invasive Spectrophotometric Hemoglobin Replace Laboratory Hemoglobin Concentrations for Preoperative Anemia Screening? A Diagnostic Test Accuracy Study. J Clin Med 2023; 12:5733. [PMID: 37685800 PMCID: PMC10488634 DOI: 10.3390/jcm12175733] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 08/28/2023] [Accepted: 08/31/2023] [Indexed: 09/10/2023] Open
Abstract
Preoperative assessment of hemoglobin concentration in blood is important to diagnose anemia. The primary aim of this prospective diagnostic test accuracy study was to monitor non-invasive spectrophotometric hemoglobin (SpHb, g/dL) concentrations among adults prior to elective surgery and to investigate the correlation and agreement of SpHb with laboratory hemoglobin (Hb, g/dl). A secondary aim was to identify the anemia cut-off values for SpHb based on the World Health Organization (WHO) definitions for anemia. This study included 151 consecutive patients (age ≥ 18 year) presenting for preoperative evaluation prior to scheduled elective general or orthopedic surgery. Results identified the mean ± SD of SpHb at 11.43 ± 2.01 g/dL, which underestimated the mean laboratory Hb (12.64 ± 2.29 g/dL, p < 0.001). A bias mean difference (SpHb-Hb) of -1.21 g/dL, with a SD of 1.76, was reported. This bias (SpHb-Hb) was inversely correlated with the mean Hb concentrations. A positive correlation existed between SpHb and Hb, with a good degree of reliability and a significant Intra Class Correlation (ICC). SpHb diagnosed anemia in 32.3% and 60.3% of males and females, respectively. The SpHb cut-off values to identify anemia were 11.3 and 10.2 g/dL for males and females, respectively, with a sensitivity of 83.3% for males and only 62.9% for females. The specificity for males and females were 81% and 91.3%, respectively. SpHb sensitivity allows for anemia diagnosis among males, but not females. However, the specificity allows SpHb to rule out anemia for both.
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Affiliation(s)
- Maryam Alwabari
- Anesthesia Department, King Fahad Hospital, Ministry of Health, Hofuf 36441, Al Ahsa, Saudi Arabia; (M.A.); (F.A.); (I.A.)
| | - Fatimah Alhamad
- College of Medicine, King Faisal University, Hofuf 31983, Al Ahsa, Saudi Arabia; (F.A.); (F.A.); (F.A.A.)
| | - Fatimah Alsahaf
- College of Medicine, King Faisal University, Hofuf 31983, Al Ahsa, Saudi Arabia; (F.A.); (F.A.); (F.A.A.)
| | - Fatima Al Amer
- College of Medicine, King Faisal University, Hofuf 31983, Al Ahsa, Saudi Arabia; (F.A.); (F.A.); (F.A.A.)
| | - Fatma Alniniya
- Anesthesia Department, King Fahad Hospital, Ministry of Health, Hofuf 36441, Al Ahsa, Saudi Arabia; (M.A.); (F.A.); (I.A.)
| | - Imran Alherz
- Anesthesia Department, King Fahad Hospital, Ministry of Health, Hofuf 36441, Al Ahsa, Saudi Arabia; (M.A.); (F.A.); (I.A.)
| | - Nawal Omer
- Hereditary Blood Disease Center, Hofuf 36422, Al Ahsa, Saudi Arabia;
| | - Abdulaziz Bushehab
- Nursing Services, Hereditary Blood Disease Center, Hofuf 36422, Al Ahsa, Saudi Arabia;
| | - Khaled Yassen
- Anesthesia Unit, Surgery Department, College of Medicine, King Faisal University, Hofuf 31983, Al Ahsa, Saudi Arabia
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15
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Garcia-Casal MN, Dary O, Jefferds ME, Pasricha SR. Diagnosing anemia: Challenges selecting methods, addressing underlying causes, and implementing actions at the public health level. Ann N Y Acad Sci 2023; 1524:37-50. [PMID: 37061792 PMCID: PMC10880862 DOI: 10.1111/nyas.14996] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2023]
Abstract
Accurate and affordable tools for diagnosing anemia and its main determinants are essential for understanding the magnitude and distribution of the problem and the appropriate interventions needed for its timely prevention and treatment. The objective of this review is to address methods, equipment, and sample-related and quality control aspects of hemoglobin measurement for anemia diagnosis. Also, other iron-, infectious-, and genetic-related causes of anemia are addressed in individuals and populations. The best practice for hemoglobin determination is the use of venous blood, analyzed on automated hematology analyzers, with high-quality control measures in place. The importance of a correct anemia diagnosis is highlighted by the cost of a misdiagnosis. A false-negative diagnosis may result in missing out and not treating anemia, its causes, and its adverse effects. On the other hand, a false-positive diagnosis may result in the provision of unneeded treatment or referral for expensive laboratory tests to determine a cause of anemia, wasting valuable resources and risking causing harm. At the individual level, clinicians must understand the causes of absolute and functional anemia to diagnose and treat anemia at the clinical level. Actions toward anemia diagnosis and control at public health levels require global, regional, and country actions that should cover general and context-specific characteristics.
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Affiliation(s)
| | - Omar Dary
- Bureau for Global Health, US Agency for International Development, Washington, DC, USA
| | - Maria Elena Jefferds
- Division of Nutrition, Physical Activity and Obesity, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Sant-Rayn Pasricha
- Population Health and Immunity Division, The Walter and Eliza Hall Institute of Medical Research, Melbourne, Victoria, Australia
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16
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Haggenmüller V, Bogler L, Weber AC, Kumar A, Bärnighausen T, Danquah I, Vollmer S. Smartphone-based point-of-care anemia screening in rural Bihar in India. COMMUNICATIONS MEDICINE 2023; 3:38. [PMID: 36949164 PMCID: PMC10033918 DOI: 10.1038/s43856-023-00267-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 03/02/2023] [Indexed: 03/24/2023] Open
Abstract
BACKGROUND The high prevalence of anemia in resource-constrained settings calls for easy-to-use, inexpensive screening tools. The Sanguina Smartphone App, an innovative tool for non-invasive hemoglobin estimation via color-sensitive, algorithm-based analysis of fingernail bed images, was validated in the United States. This study evaluates the performance of the App in a population with different socio-economic, ethnic, demographic and cultural composition in rural Bihar, India. METHODS For 272 mainly adult patients of a private health centre, hemoglobin measurement with the App is compared with the gold standard laboratory blood analysis. For a second sample of 179 children attending pre-schools, hemoglobin measurement with the App is compared to the results of the HemoCue Hb 301, a point-of-care device using a small blood sample, serving as the reference standard for field-based settings. RESULTS The App reaches ±4.43 g/dl accuracy and 0.38 g/dl bias of comparator values in the clinic-based sample, and ±3.54 g/dl and 1.30 g/dl, respectively in the pre-school sample. After retraining the algorithm with the collected data, the validity of the upgraded version is retested showing an improved performance (accuracy of ±2.25 g/dl, bias of 0.25 g/dl), corresponding to the results of the original validation study from the United States. CONCLUSIONS The initial version of the App does not achieve the accuracy needed for diagnosis or screening. After retraining the algorithm, it achieves an accuracy sufficient for screening. The improved version with the potential for further adaptions is a promising easy-to-use, inexpensive screening tool for anemia in resource-constrained point-of-care settings.
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Affiliation(s)
- Verena Haggenmüller
- Heidelberg Institute of Global Health, Heidelberg University Hospital, Im Neuenheimer Feld 130.3, 69120, Heidelberg, Germany
| | - Lisa Bogler
- Centre for Modern Indian Studies (CeMIS), University of Goettingen, Waldweg 26, 37073, Göttingen, Germany.
| | - Ann-Charline Weber
- Centre for Modern Indian Studies (CeMIS), University of Goettingen, Waldweg 26, 37073, Göttingen, Germany
| | - Abhijeet Kumar
- Centre for Modern Indian Studies (CeMIS), University of Goettingen, Waldweg 26, 37073, Göttingen, Germany
| | - Till Bärnighausen
- Heidelberg Institute of Global Health, Heidelberg University Hospital, Im Neuenheimer Feld 130.3, 69120, Heidelberg, Germany
| | - Ina Danquah
- Heidelberg Institute of Global Health, Heidelberg University Hospital, Im Neuenheimer Feld 130.3, 69120, Heidelberg, Germany
| | - Sebastian Vollmer
- Centre for Modern Indian Studies (CeMIS), University of Goettingen, Waldweg 26, 37073, Göttingen, Germany
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17
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Hornedo-González KD, Jacob AK, Burt JM, Higgins AA, Engel EM, Hanson AC, Belch L, Kor DJ, Warner MA. Non-invasive hemoglobin estimation for preoperative anemia screening. Transfusion 2023; 63:315-322. [PMID: 36605019 PMCID: PMC9898154 DOI: 10.1111/trf.17237] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 11/03/2022] [Accepted: 11/22/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND Preoperative anemia is common and associated with adverse postoperative outcomes. Assessment of hemoglobin concentrations may facilitate optimization prior to surgery. However, phlebotomy-based hemoglobin measurement may contribute to patient discomfort and iatrogenic blood loss, which makes non-invasive hemoglobin estimation attractive in this setting. STUDY DESIGN AND METHODS This is a prospective study of adult patients presenting for preoperative evaluation before elective surgery at a tertiary care medical center. The Masimo Pronto Pulse CO-Oximeter was utilized to estimate blood hemoglobin concentrations (SpHb), which were then compared with hemoglobin concentrations obtained via complete blood count. Receiver operating curves were used to identify SpHb values maximizing specificity for anemia detection while meeting a minimum sensitivity of 80%. RESULTS A total of 122 patients were recruited with a median (interquartile range) age of 66 (58, 72) years. SpHb measurements were obtained in 112 patients (92%). SpHb generally overestimated hemoglobin with a mean (± 1.96 × standard deviation) difference of 0.8 (-2.2, 3.9) g/dL. Preoperative anemia, defined by hemoglobin <12.0 g/dL in accordance with institutional protocol, was present in 22 patients (20%). The optimal SpHb cut-point to identify anemia was 13.5 g/dL: sensitivity 86%, specificity 81%, negative predictive value 96%, and positive predictive value 53%. Utilizing this cut-point, 60% (73/122) of patients could have avoided phlebotomy-based hemoglobin assessment, while an anemia diagnosis would have been missed in <3% (3/122). CONCLUSION The use of SpHb devices for anemia screening in surgical patients is feasible with the potential to reliably rule-out anemia despite limited accuracy.
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Affiliation(s)
- Kevin D Hornedo-González
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota, USA
- School of Medicine, University of Puerto Rico, San Juan, Puerto Rico
| | - Adam K Jacob
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota, USA
- Preoperative Evaluation Clinic, Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Jennifer M Burt
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota, USA
- Patient Blood Management Program, Mayo Clinic, Rochester, Minnesota, USA
| | - Andrew A Higgins
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota, USA
- Patient Blood Management Program, Mayo Clinic, Rochester, Minnesota, USA
| | - Elizabeth M Engel
- Preoperative Evaluation Clinic, Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Andrew C Hanson
- Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota, USA
| | - Lisa Belch
- Preoperative Evaluation Clinic, Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Daryl J Kor
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota, USA
- Patient Blood Management Program, Mayo Clinic, Rochester, Minnesota, USA
| | - Matthew A Warner
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota, USA
- Patient Blood Management Program, Mayo Clinic, Rochester, Minnesota, USA
- Division of Critical Care Medicine, Mayo Clinic, Rochester, Minnesota, USA
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18
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Fothergill A, Crider KS, Johnson CB, Raj MP, Guetterman HM, Bose B, Rose CE, Qi YP, Williams JL, Kuriyan R, Bonam W, Finkelstein JL. Comparison of Anemia Screening Methods Using Paired Venous Samples in Women of Reproductive Age in Southern India. J Nutr 2023; 152:2978-2992. [PMID: 36130238 PMCID: PMC9840000 DOI: 10.1093/jn/nxac218] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 08/28/2022] [Accepted: 09/16/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Anemia is an important public health problem, and accurate estimates may inform policy and programs. Although hemoglobin (Hb) assessment of venous blood via automated hematology analyzers (AHAs) is recommended, most population-based surveys estimate anemia prevalence based on analysis of capillary blood via portable hemoglobinometers. OBJECTIVES We aimed to evaluate screening methods for hemoglobin and anemia assessment using paired venous samples. METHODS Participants were women 15-40 y who were not pregnant or lactating. Paired venous whole blood samples (n = 896) were analyzed for hemoglobin (Hb) via portable hemoglobinometer (HemoCue 301) and Coulter Counter AHA. Anemia and severe anemia were defined as Hb <12.0g/dL and <8.0 g/dL, respectively. Bland-Altman methods were used to assess the level of agreement for Hb results (mean difference, SD of differences, limits of agreement). Diagnostic accuracy parameters (sensitivity, specificity, positive predictive value, negative predictive value, accuracy) were calculated to evaluate HemoCue performance compared to the AHA reference, overall and by sociodemographic, nutritional, and metabolic characteristics. RESULTS The estimated anemia prevalence was significantly lower via HemoCue vs. AHA (36.3% compared with 41.6%; P value < 0.0001). The HemoCue had 84.4% accuracy for anemia screening and 98.8% for severe anemia, compared to the AHA reference. The HemoCue had 74.8% sensitivity and 91.2% specificity, compared to AHA. HemoCue sensitivity was higher in women with iron deficiency [serum ferritin (SF) <15.0 μg/L: 81.6% compared with SF ≥15.0 μg/L: 41.3%], and lower in women with metabolic risk factors, including overweight [BMI ≥25.0 kg/m2: 63.9% vs. BMI <25.0 kg/m2: 78.8%], or elevated CRP (>1.0 mg/L: 67.2% vs. ≤1.0 mg/L: 82.9%), trunk fat (>35%: 62.7% vs. ≤35%: 80.1%), or whole-body fat (>35%: 63.9% vs. ≤35%: 80.3%). CONCLUSIONS Findings suggest that women with anemia may be incorrectly identified as not anemic via portable hemoglobinometer, and anemia prevalence may be underestimated at the population level.This study was registered at clinicaltrials.gov as NCT04048330.
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Affiliation(s)
- Amy Fothergill
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, USA
| | - Krista S Crider
- National Center on Birth Defects and Developmental Disabilities, CDC, Atlanta, GA, USA
| | | | - Mical P Raj
- Arogyavaram Medical Centre, Andhra Pradesh, India
| | | | - Beena Bose
- Division of Nutrition, St. John's Research Institute, Bangalore, India
| | - Charles E Rose
- National Center on Birth Defects and Developmental Disabilities, CDC, Atlanta, GA, USA
| | - Yan P Qi
- National Center on Birth Defects and Developmental Disabilities, CDC, Atlanta, GA, USA
| | - Jennifer L Williams
- National Center on Birth Defects and Developmental Disabilities, CDC, Atlanta, GA, USA
| | - Rebecca Kuriyan
- Division of Nutrition, St. John's Research Institute, Bangalore, India
| | - Wesley Bonam
- Arogyavaram Medical Centre, Andhra Pradesh, India
| | - Julia L Finkelstein
- Division of Nutritional Sciences, Cornell University, Ithaca, NY, USA
- Division of Nutrition, St. John's Research Institute, Bangalore, India
- Division of Epidemiology, Department of Population Health Sciences, Weill Cornell Medical College, New York, NY, USA
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19
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Stawschenko E, Schaller T, Kern B, Bode B, Dörries F, Kusche-Vihrog K, Gehring H, Wegerich P. Current Status of Measurement Accuracy for Total Hemoglobin Concentration in the Clinical Context. BIOSENSORS 2022; 12:1147. [PMID: 36551114 PMCID: PMC9775510 DOI: 10.3390/bios12121147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 11/22/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
OBJECTIVE The main objective of this investigation is to provide data about the accuracy of total hemoglobin concentration measurements with respect to clinical settings, and to devices within the categories of point-of-care and reference systems. In particular, tolerance of hemoglobin concentrations below 9 g/dL that have become common in clinical practice today determines the need to demonstrate the limits of measurement accuracy in patient care. METHODS Samples extracted from six units of heparinized human blood with total hemoglobin concentrations ranging from 3 to 18 g/dL were assigned to the test devices in a random order. The pool of test devices comprised blood gas analyzers, an automatic hematology analyzer, a laboratory reference method, and the point-of-care system HemoCue. To reduce the pre-analytic error, each sample was measured three times. Due to the characteristics of the tested devices and methods, we selected the mean values of the data from all these devices, measured at the corresponding total hemoglobin concentrations, as the reference. MAIN RESULTS The measurement results of the test devices overlap within strict limits (R2 = 0.999). Only the detailed analysis provides information about minor but systematic deviations. In the group of clinically relevant devices, which are involved in patient blood management decisions, the relative differences were within the limit of +/- 5 % for values down to 3 g/dL. CONCLUSIONS A clinically relevant change of +/- 0.5 g/dL of total hemoglobin concentration can be detected with all selected devices and methods. Compliance with more stringent definitions-these are the relative differences of 5 % in relation to the corresponding reference values and the clinically adapted thresholds in the format of a tolerance level analysis-was achieved by the clinical devices assessed here.
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Affiliation(s)
- Elena Stawschenko
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany
| | - Tim Schaller
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany
- Institute of Biomedical Engineering, University of Luebeck, 23562 Luebeck, Germany
| | - Benjamin Kern
- Medical Sensors and Devices Laboratory, Lübeck University of Applied Sciences, 23562 Luebeck, Germany
| | - Berit Bode
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany
| | - Frank Dörries
- Northern Scientific Tec & Integration GmbH, Kollaustr. 11-13, 22525 Hamburg, Germany
| | | | - Hartmut Gehring
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany
| | - Philipp Wegerich
- Institute of Biomedical Engineering, University of Luebeck, 23562 Luebeck, Germany
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20
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Jefferds MED, Mei Z, Addo Y, Hamner HC, Perrine CG, Flores-Ayala R, Pfeiffer CM, Sharma AJ. Iron Deficiency in the United States: Limitations in Guidelines, Data, and Monitoring of Disparities. Am J Public Health 2022; 112:S826-S835. [PMID: 36288529 PMCID: PMC9612197 DOI: 10.2105/ajph.2022.306998] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2022] [Indexed: 11/04/2022]
Abstract
Iron deficiency and the more severe sequela, iron deficiency anemia, are public health problems associated with morbidity and mortality, particularly among pregnant women and younger children. The 1998 Centers for Disease Control and Prevention recommendations for prevention and control of iron deficiency in the United States is old and does not reflect recent evidence but is a foundational reference for many federal, clinical, and program guidelines. Surveillance data for iron deficiency are sparse at all levels, with critical gaps for pregnant women and younger children. Anemia, iron deficiency, and iron deficiency anemia are often conflated but should not be. Clinical guidelines for anemia, iron deficiency, and iron deficiency anemia give inconsistent recommendations, causing nonsystematic assessment of iron deficiency. Screening for iron deficiency typically relies on identifying anemia, despite anemia's low sensitivity for iron deficiency. In the National Health and Nutrition Examination Survey, more than 70% of iron deficiency is missed among pregnant women and children by relying on hemoglobin for iron deficiency screening. To improve assessment and diagnosis and strengthen surveillance, better and more complete data and updated foundational guidance on iron deficiency and anemia are needed that consider new evidence for measuring and interpreting laboratory results. (Am J Public Health. 2022;112(S8):S826-S835. https://doi.org/10.2105/AJPH.2022.306998).
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Affiliation(s)
- Maria Elena D Jefferds
- At the time of writing, Maria Elena D. Jefferds, Zuguo Mei, Yaw Addo, Heather C. Hamner, Cria G. Perrine, Rafael Flores-Ayala, and Andrea J. Sharma were with the National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC), Atlanta, GA. Christine M. Pfeiffer was with the Nutritional Biomarkers Branch, National Center for Environmental Health, CDC, Atlanta
| | - Zuguo Mei
- At the time of writing, Maria Elena D. Jefferds, Zuguo Mei, Yaw Addo, Heather C. Hamner, Cria G. Perrine, Rafael Flores-Ayala, and Andrea J. Sharma were with the National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC), Atlanta, GA. Christine M. Pfeiffer was with the Nutritional Biomarkers Branch, National Center for Environmental Health, CDC, Atlanta
| | - Yaw Addo
- At the time of writing, Maria Elena D. Jefferds, Zuguo Mei, Yaw Addo, Heather C. Hamner, Cria G. Perrine, Rafael Flores-Ayala, and Andrea J. Sharma were with the National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC), Atlanta, GA. Christine M. Pfeiffer was with the Nutritional Biomarkers Branch, National Center for Environmental Health, CDC, Atlanta
| | - Heather C Hamner
- At the time of writing, Maria Elena D. Jefferds, Zuguo Mei, Yaw Addo, Heather C. Hamner, Cria G. Perrine, Rafael Flores-Ayala, and Andrea J. Sharma were with the National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC), Atlanta, GA. Christine M. Pfeiffer was with the Nutritional Biomarkers Branch, National Center for Environmental Health, CDC, Atlanta
| | - Cria G Perrine
- At the time of writing, Maria Elena D. Jefferds, Zuguo Mei, Yaw Addo, Heather C. Hamner, Cria G. Perrine, Rafael Flores-Ayala, and Andrea J. Sharma were with the National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC), Atlanta, GA. Christine M. Pfeiffer was with the Nutritional Biomarkers Branch, National Center for Environmental Health, CDC, Atlanta
| | - Rafael Flores-Ayala
- At the time of writing, Maria Elena D. Jefferds, Zuguo Mei, Yaw Addo, Heather C. Hamner, Cria G. Perrine, Rafael Flores-Ayala, and Andrea J. Sharma were with the National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC), Atlanta, GA. Christine M. Pfeiffer was with the Nutritional Biomarkers Branch, National Center for Environmental Health, CDC, Atlanta
| | - Christine M Pfeiffer
- At the time of writing, Maria Elena D. Jefferds, Zuguo Mei, Yaw Addo, Heather C. Hamner, Cria G. Perrine, Rafael Flores-Ayala, and Andrea J. Sharma were with the National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC), Atlanta, GA. Christine M. Pfeiffer was with the Nutritional Biomarkers Branch, National Center for Environmental Health, CDC, Atlanta
| | - Andrea J Sharma
- At the time of writing, Maria Elena D. Jefferds, Zuguo Mei, Yaw Addo, Heather C. Hamner, Cria G. Perrine, Rafael Flores-Ayala, and Andrea J. Sharma were with the National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC), Atlanta, GA. Christine M. Pfeiffer was with the Nutritional Biomarkers Branch, National Center for Environmental Health, CDC, Atlanta
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21
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Favaloro EJ, Pasalic L, Lippi G. Getting smart with coagulation. J Thromb Haemost 2022; 20:1519-1522. [PMID: 35297174 DOI: 10.1111/jth.15691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/01/2022] [Accepted: 03/02/2022] [Indexed: 10/18/2022]
Affiliation(s)
- Emmanuel J Favaloro
- Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), NSW Health Pathology, Westmead Hospital, Westmead, New South Wales, Australia
- Sydney Centres for Thrombosis and Haemostasis, Westmead, New South Wales, Australia
- Faculty of Science and Health, Charles Sturt University, Wagga Wagga, New South Wales, Australia
| | - Leonardo Pasalic
- Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), NSW Health Pathology, Westmead Hospital, Westmead, New South Wales, Australia
- Sydney Centres for Thrombosis and Haemostasis, Westmead, New South Wales, Australia
- University of Sydney, Westmead, New South Wales, Australia
| | - Giuseppe Lippi
- Section of Clinical Biochemistry, University of Verona, Verona, Italy
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22
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Field Experiences with Handheld Diagnostic Devices to Triage Children under Five Presenting with Severe Febrile Illness in a District Hospital in DR Congo. Diagnostics (Basel) 2022; 12:diagnostics12030746. [PMID: 35328299 PMCID: PMC8947034 DOI: 10.3390/diagnostics12030746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 12/10/2022] Open
Abstract
As part of a field study (NCT04473768) in children presenting with severe febrile illness to Kisantu hospital (DR Congo), we retrospectively compiled user experiences (not performance) with handheld diagnostic devices assisting triage: tympanic thermometer, pulse oximeter (measuring heart rate, respiratory rate and oxygen saturation), hemoglobinometer and glucometer. Guidance documents for product selection were generic and scattered. Stock rupture, market withdrawal and unaffordable prices interfered with procurement. Challenges at implementation included environmental temperature, capillary blood sampling (antisepsis, order of multiple tests, filling microcuvettes and glucose strips), calibration (environmental temperature, cold chain) and liability-oriented communication with a manufacturer. Instructions for use were readable and contained symbol keys; two devices had printed French-language instructions. Shortcomings were poor integration of figures with text and distinct procedures for the oximeter and its sensor. Usability interview revealed appreciations for quick results, visibility of the display and memory function (three devices) but also problems of capillary blood sample transfer, cleaning, too long of a time-to-results (respiratory rate) and size, fitting and disposal of thermometer probes. Pictorial error messages were preferred over alphanumeric error codes but interpretation of symbols was poor. Alarm sounds of the oximeter caused unrest in children and caretakers perceived the device as associated with poor prognosis.
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