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Tatliparmak AC, Ozden MF, Ak R, Yılmaz S. Comparison of Blood Gas Analysis and Auto-Analyzer Results for Sodium and Potassium Levels in Elderly and Non-elderly Adult Emergency Department Patients. Cureus 2024; 16:e62225. [PMID: 39006607 PMCID: PMC11241636 DOI: 10.7759/cureus.62225] [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: 06/12/2024] [Indexed: 07/16/2024] Open
Abstract
Objectives This study aims to evaluate the concordance between blood gas and biochemical measurement methods for sodium and potassium levels in elderly and non-elderly patients within an emergency department (ED) setting. Methods A retrospective method comparison study was conducted at an ED from February 1, 2023, to March 1, 2023. The study included 414 patients, categorized into "elderly" (aged 65 and above; n = 138, 33.3%) and "non-elderly" (aged 18 to 64; n = 276, 66.7%) groups. Concordance was assessed using Bland-Altman, Passing-Bablok, and Lin's concordance correlation methods. Results In sodium measurements, the elderly group exhibited an average bias of -1.52 mEq/L (95% confidence interval [CI] -2.12 to -0.92), with lower and upper limits of agreement (LoA) at -8.46 and 5.42 mEq/L, respectively, indicating a broader variance than non-elderly patients, who showed an average bias of -0.82 mEq/L with limits of -4.97 to 3.32 mEq/L. For potassium, the elderly group's average bias was -0.46 mEq/L (95% CI -0.36 to -0.57), with limits of agreement from -1.68 to 0.75 mEq/L, compared to non-elderly patients with a bias of -0.29 mEq/L and limits of -0.71 to 0.13 mEq/L. Furthermore, concordance correlation coefficients revealed a reduced agreement in the elderly for both sodium (r ccc = 0.799) and potassium (r ccc = 0.529) compared to the non-elderly cohort (sodium r ccc = 0.821, potassium r ccc = 0.715). Conclusion The study identifies significant discrepancies in sodium and potassium levels between elderly and non-elderly patients, suggesting a need for diagnostic precision. It emphasizes the importance of customizing diagnostic approaches to better serve the elderly population in EDs.
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Affiliation(s)
- Ali Cankut Tatliparmak
- Emergency Department, Uskudar University, Istanbul, TUR
- Emergency Department, Memorial Sisli Hospital, Istanbul, TUR
| | | | - Rohat Ak
- Emergency Department, Kartal Dr. Lütfi Kırdar City Hospital, Istanbul, TUR
| | - Sarper Yılmaz
- Emergency Department, Kartal Dr. Lütfi Kırdar City Hospital, Istanbul, TUR
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Nandi SK, Chatterjee N, Roychowdhury T, Pradhan A, Moiz S, Manna K, Sarkar DK, Dhar P, Dutta A, Mukhopadhyay S, Bhattacharya R. Kaempferol with Verapamil impeded panoramic chemoevasion pathways in breast cancer through ROS overproduction and disruption of lysosomal biogenesis. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 113:154689. [PMID: 36921428 DOI: 10.1016/j.phymed.2023.154689] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 01/07/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Reactive oxygen species (ROS) at low level promotes cell survival through lysosome induced autophagy induction. Glucose stress induced acidosis, hypoxia, ROS, upregulates markers related to cancer stemness and multidrug resistance. Also, lysosomal upregulation is proposed to be one of the important indicators of cell survival under ROS induced stress. Studies supported that, stimulation of Lysosome-TFEB-Ca2+ cascade has important role in induction of chemoresistance and survival of cancerous cells. PURPOSE To observe the effect of synergistic drug combination, Kaempferol and Verapamil on markers regulating chemoevasion, tumor stemness & acidosis as well as lysosome upregulation pathways, under low as well as high glucose conditions. HYPOTHESIS Based on our earlier observation as well as previous reports, we hypothesized, our drug combination Kaempferol with Verapamil could attenuate markers related to chemoevasion, tumor stemness & acidosis as well as lysosome-TFEB-Ca2+ pathway, all of which have indispensable association and role in chemoresistance. METHODS RNA and protein expression of candidate genes, along with ROS production and Ca2+ concentrations were measured in ex vivo models in altered glucose conditions upon treatment with KV. Also, computational approaches were utilized to hypothesize the mechanism of action of the drug combination. PCR, IHC, western blotting and molecular docking approaches were used in this study. RESULTS The overproduction of ROS by our candidate drugs KV, downregulated the chemoresistance and tumor acidosis markers along with ATP1B1 and resulted in lysosomal disruption with reduction of Ca2+ release, diminishing TFEB expression under low glucose condition. An anomalous outcome was observed in high glucose conditions. We also observed KV promoted the overproduction of ROS levels thereby inducing autophagy-mediated cell death through the upregulation of LC3-II and p62 in low glucose conditions. The ex vivo studies also corroborate with in silico study that exhibited the parallel outcome. CONCLUSION Our ex-vivo and in-silico studies revealed that our candidate drug combination KV, could effectively target several pathways regulating chemoresistance, that were not hitherto studied in the same experimental setup and thus may be endorsed for therapeutic purposes.
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Affiliation(s)
- Sourav Kumar Nandi
- Department of Molecular Biology, Netaji Subhas Chandra Bose Cancer Research Institute, 3081 Nayabad, Kolkata-700094, India
| | - Niloy Chatterjee
- Centre for Research in Nanoscience & Nanotechnology, University of Calcutta, JD 2, Sector III, Salt Lake City, Kolkata 700 098, West Bengal, India
| | - Tanaya Roychowdhury
- Cancer Biology and Inflammatory Disorder Division, Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Kolkata-700032, India
| | - Ayan Pradhan
- Department of General Surgery, Institute of Post graduate Medical Education &Research and SSKM Hospital, 244B AJC Bose Road Kolkata-700020, India
| | - Sumaiya Moiz
- Department of Molecular Biology, Netaji Subhas Chandra Bose Cancer Research Institute, 3081 Nayabad, Kolkata-700094, India
| | - Krishnendu Manna
- Department of Food and Nutrition, University of Kalyani, Kalyani, West Bengal, 741235, India
| | - Diptendra Kumar Sarkar
- Department of General Surgery, Institute of Post graduate Medical Education &Research and SSKM Hospital, 244B AJC Bose Road Kolkata-700020, India
| | - Pubali Dhar
- Laboratory of Food Science and Technology, Food and Nutrition division, University of Calcutta, 20B Judges Court Road. Kolkata 700027, West Bengal, India
| | - Amitava Dutta
- Department of Pathology, Netaji Subhas Chandra Bose Cancer Research Institute, 3081 Nayabad, Kolkata-700094
| | - Soma Mukhopadhyay
- Department of Molecular Biology, Netaji Subhas Chandra Bose Cancer Research Institute, 3081 Nayabad, Kolkata-700094, India
| | - Rittwika Bhattacharya
- Department of Molecular Biology, Netaji Subhas Chandra Bose Cancer Research Institute, 3081 Nayabad, Kolkata-700094, India.
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Konuksever D, Yucel SP, Bölük O, Kılıç BO, Taşar MA. Compatibility levels between blood gas analysis and central laboratory hemoglobin and electrolyte tests in pediatric patients: A single-center experience. Paediatr Anaesth 2023; 33:107-113. [PMID: 36178754 DOI: 10.1111/pan.14567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 09/24/2022] [Accepted: 09/27/2022] [Indexed: 01/20/2023]
Abstract
INTRODUCTION We aimed to evaluate the interchangeability of sodium, potassium, hemoglobin, and hematocrit measurement between the blood gas analyzers and laboratory automatic analyzers results. METHODS This was a retrospective cross-sectional study. The results of 1927 paired samples analyzed simultaneously with the blood gas analyzer and the laboratory automatic analyzer were compared. The Bland-Altman and Cohen's kappa statistic detected the agreement between the two analyses. RESULTS The limits of agreement (±1.96 standard deviation of the mean difference) were -11.1 to 20.3 for sodium, -1.9 to 0.5 for potassium, -16.1 to 12.9 for hematocrit, and -5.0 to 4.0 for hemoglobin. Agreement between the two analyses was not acceptable within the defined clinically acceptable limits. In addition, none of the kappa values were higher than 0.60, which highlights the lack of agreement between the two analyzers. CONCLUSION The blood gas analyzers and laboratory automatic analyzers results cannot be used interchangeably.
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Affiliation(s)
- Dilek Konuksever
- Department of Pediatrics, Turkish Ministry of Health Ankara City Hospital, Ankara, Turkey
| | | | - Oğuz Bölük
- Department of Pediatrics, Ankara Training and Research Hospital, Ankara, Turkey
| | - Betül Orhan Kılıç
- Department of Pediatrics, Baskent University Hospital, Ankara, Turkey
| | - Medine Ayşin Taşar
- Department of Pediatrics, Ankara Training and Research Hospital, Ankara, Turkey
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Methods and Advances in the Design, Testing and Development of In Vitro Diagnostic Instruments. Processes (Basel) 2023. [DOI: 10.3390/pr11020403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
With the continuous improvement of medical testing and instrumentation engineering technologies, the design, testing and development methods of in vitro diagnostic instruments are developing rapidly. In vitro diagnostic instruments are also gradually developing into a class of typical high-end medical equipment. The design of in vitro diagnostic instruments involves a variety of medical diagnostic methods and biochemical, physical and other related technologies, and its development process involves complex system engineering. This paper systematically organizes and summarizes the design, testing and development methods of in vitro diagnostic instruments and their development in recent years, focusing on summarizing the related technologies and core aspects of the R&D process, and analyzes the development trend of the in vitro diagnostic instrument market.
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Hyponatremia in the emergency department. Am J Emerg Med 2022; 60:1-8. [PMID: 35870366 DOI: 10.1016/j.ajem.2022.07.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 11/20/2022] Open
Abstract
Hyponatremia, defined as a serum sodium <135 mmol/L, is frequently encountered in patients presenting to the emergency department. Symptoms are often unspecific and include a recent history of falls, weakness and vertigo. Common causes of hyponatremia include diuretics, heart failure as well as Syndrome of Inappropriate Antidiuresis (SIAD) and correct diagnosis can be challenging. Emergency treatment of hyponatremia should be guided by presence of symptoms and focus on distinguishing between acute and chronic hyponatremia.
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Chen LD, Wang WJ, Wang GJ. Electrochemical Detection of Electrolytes Using a Solid-State Ion-Selective Electrode of Single-Piece Type Membrane. BIOSENSORS 2021; 11:109. [PMID: 33917075 PMCID: PMC8067767 DOI: 10.3390/bios11040109] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/22/2021] [Accepted: 04/04/2021] [Indexed: 12/20/2022]
Abstract
This study aimed to develop simple electrochemical electrodes for the fast detection of chloride, sodium and potassium ions in human serum. A flat thin-film gold electrode was used as the detection electrode for chloride ions; a single-piece type membrane based solid-state ion-selective electrode (ISE), which was formed by covering a flat thin-film gold electrode with a mixture of 7,7,8,8-tetracyanoquinodimethane (TCNQ) and ion-selective membrane (ISM), was developed for sodium and potassium ions detection. Through cyclic voltammetry (CV) and square-wave voltammetry (SWV), the detection data can be obtained within two minutes. The linear detection ranges in the standard samples of chloride, sodium, and potassium ions were 25-200 mM, 50-200 mM, and 2-10 mM, with the average relative standard deviation (RSD) of 0.79%, 1.65%, and 0.47% and the average recovery rates of 101%, 100% and 96%, respectively. Interference experiments with Na+, K+, Cl-, Ca2+, and Mg2+ ions demonstrated that the proposed detection electrodes have good selectivity. Moreover, the proposed detection electrodes have characteristics such as the ability to be prepared under relatively simple process conditions, excellent detection sensitivity, and low RSD, and the detection linear range is suitable for the Cl-, Na+ and K+ concentrations in human serum.
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Affiliation(s)
- Li-Da Chen
- Department of Mechanical Engineering, National Chung-Hsing University, Taichung 40227, Taiwan; (L.-D.C.); (W.-J.W.)
| | - Wei-Jhen Wang
- Department of Mechanical Engineering, National Chung-Hsing University, Taichung 40227, Taiwan; (L.-D.C.); (W.-J.W.)
| | - Gou-Jen Wang
- Department of Mechanical Engineering, National Chung-Hsing University, Taichung 40227, Taiwan; (L.-D.C.); (W.-J.W.)
- Graduate Institute of Biomedical Engineering, National Chung-Hsing University, Taichung 40227, Taiwan
- Regenerative Medicine and Cell Therapy Research Center, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
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Del Prete C, Lanci A, Cocchia N, Freccero F, Di Maio C, Castagnetti C, Mariella J, Micieli F. Venous blood gas parameters, electrolytes, glucose and lactate concentration in sick neonatal foals: Direct venipuncture versus push-pull technique. Equine Vet J 2020; 53:488-494. [PMID: 32770680 DOI: 10.1111/evj.13332] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/11/2020] [Accepted: 07/31/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND Blood collection by indwelling intravenous catheter (IVC) avoids repeated venipuncture, which could cause thrombophlebitis risk, anxiety and pain in patients. OBJECTIVES To compare blood gas parameters, electrolytes, glucose, lactate and haematocrit concentration obtained from venous blood samples collected via a jugular IVC by push-pull (PP) technique to those obtained by venipuncture in hospitalised foals, at the time of catheter placement (T0) and 24 hours after the beginning of intravenous therapy (T24). STUDY DESIGN Prospective observational study. METHODS Paired blood samples were drawn from hospitalised foals at T0 and T24. In each foal, one venous blood sample was collected via IVC by the following PP technique: 2.4 mL of blood was aspirated and immediately reinfused through the catheter three times consecutively, then 1 mL of blood was collected using a 1 mL heparinised syringe. Thereafter, another sample was collected by direct venipuncture of the contralateral jugular vein, with an identical 1 mL heparinised syringe, with a 1-inch, 20-G needle. All samples were analysed with an automated blood gas analyser within 10 minutes of collection. The agreement between the two techniques was assessed by Bland-Altman analysis and intraclass correlation coefficient (ICC). RESULTS The level of agreement of blood gas values obtained by the two different techniques was high with very small bias and clinically acceptable ICC (>0.907 at T0; >0.794 at T24) for all variables, except for haematocrit (bias -3.52 at T0; -2.44 at T24) and PvO2 at T0 and T24 (ICC 0.669 and 0.733, respectively). MAIN LIMITATIONS Potential sub-clinical catheter-related complications were not investigated by ultrasound or bacterial culture of the catheter; short duration of the study. CONCLUSIONS PP technique appears to be acceptable for collection of blood samples for venous blood gas parameters, as well as electrolytes, glucose and lactate in sick neonatal foals.
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Affiliation(s)
- Chiara Del Prete
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Napoli, Italy
| | - Aliai Lanci
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Natascia Cocchia
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Napoli, Italy
| | - Francesca Freccero
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Chiara Di Maio
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Carolina Castagnetti
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy.,Health Science and Technologies Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Bologna, Italy
| | - Jole Mariella
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Fabiana Micieli
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Napoli, Italy
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Yi HC, Shi WS, Zhang YH, Zhu XZ, Yu Y, Wang XX, Dai Z, Lin Y. Comparison of electrolyte and glucose levels measured by a blood gas analyzer and an automated biochemistry analyzer among hospitalized patients. J Clin Lab Anal 2020; 34:e23291. [PMID: 32147884 PMCID: PMC7370720 DOI: 10.1002/jcla.23291] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 11/27/2022] Open
Abstract
Background Blood gas analyzers are capable of delivering results on electrolytes and metabolites within a few minutes and facilitate clinical decision‐making. However, whether the results can be used interchangeably with values measured by chemistry analyzers remains controversial. Blood gas analyzers are capable of delivering results on electrolytes and metabolites within a few minutes and facilitate clinical decision‐making. However, whether the results can be used interchangeably with values measured by chemistry analyzers remains controversial. Methods In total, arterial and matched venous blood samples were collected from 200 hospitalized patients. Arterial blood samples were evaluated using a RAPIDPOINT 500 to test electrolyte and glucose levels, then the samples were centrifuged and the same parameters were measured with an AU5800. Venous blood samples were processed and tested in accordance with standard operation procedures. Data were compared by using a paired t test, the agreement between the two analyzers was evaluated by using the Bland‐Altman test, and sensitivity and specificity were calculated. Results Paired t tests showed that all parameters tested were significantly different between the two analyzers except chloride. The biases calculated indicated that blood gas analyzers tend to underestimate the parameters, and the linear regression showed a strong correlation between the two analyzers. The sensitivity, specificity and kappa values demonstrated that the diagnostic performance of blood gas analyzers is not satisfactory. Conclusion The significant reduction in parameter estimation and diagnostic performance we observed suggested that clinicians should interpret results from blood gas analyzers more cautiously. The reference interval of blood gas analyzers should be adjusted accordingly, given that values are underestimated.
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Affiliation(s)
- Huo-Chun Yi
- Center of Clinical Laboratory, School of Medicine, Zhongshan Hospital, Xiamen University, Xiamen, China
| | - Wen-Sheng Shi
- Center of Clinical Laboratory, School of Medicine, Zhongshan Hospital, Xiamen University, Xiamen, China
| | - Yin-Hui Zhang
- Department of Medical Laboratory, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, China
| | - Xiao-Zhen Zhu
- Center of Clinical Laboratory, School of Medicine, Zhongshan Hospital, Xiamen University, Xiamen, China
| | - Yang Yu
- Center of Clinical Laboratory, School of Medicine, Zhongshan Hospital, Xiamen University, Xiamen, China
| | - Xin-Xin Wang
- Center of Clinical Laboratory, School of Medicine, Zhongshan Hospital, Xiamen University, Xiamen, China
| | - Zhang Dai
- Center of Clinical Laboratory, School of Medicine, Zhongshan Hospital, Xiamen University, Xiamen, China
| | - Yong Lin
- Center of Clinical Laboratory, School of Medicine, Zhongshan Hospital, Xiamen University, Xiamen, China.,Institution of Infectious Diseases, School of Medicine, Xiamen University, Xiamen, China
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Pasquier M, Blancher M, Buse S, Boussat B, Debaty G, Kirsch M, de Riedmatten M, Schoettker P, Annecke T, Bouzat P. Intra-patient potassium variability after hypothermic cardiac arrest: a multicentre, prospective study. Scand J Trauma Resusc Emerg Med 2019; 27:113. [PMID: 31842931 PMCID: PMC6916106 DOI: 10.1186/s13049-019-0694-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 12/03/2019] [Indexed: 12/24/2022] Open
Abstract
Background To date, the decision to set up therapeutic extra-corporeal life support (ECLS) in hypothermia-related cardiac arrest is based on the potassium value only. However, no information is available about how the analysis should be performed. Our goal was to compare intra-individual variation in serum potassium values depending on the sampling site and analytical technique in hypothermia-related cardiac arrests. Methods Adult patients with suspected hypothermia-related refractory cardiac arrest, admitted to three hospitals with ECLS facilities were included. Blood samples were obtained from the femoral vein, a peripheral vein and the femoral artery. Serum potassium was analysed using blood gas (BGA) and clinical laboratory analysis (CL). Results Of the 15 consecutive patients included, 12 met the principal criteria, and 5 (33%) survived. The difference in average potassium values between sites or analytical method used was ≤1 mmol/L. The agreement between potassium values according to the three different sampling sites was poor. The ranges of the differences in potassium using BGA measurement were − 1.6 to + 1.7 mmol/L; − 1.18 to + 2.7 mmol/L and − 0.87 to + 2 mmol/L when comparing respectively central venous and peripheral venous, central venous and arterial, and peripheral venous and arterial potassium. Conclusions We found important and clinically relevant variability in potassium values between sampling sites. Clinical decisions should not rely on one biological indicator. However, according to our results, the site of lowest potassium, and therefore the preferred site for a single potassium sampling is central venous blood. The use of multivariable prediction tools may help to mitigate the risks inherent in the limits of potassium measurement. Trial registration ClinicalTrials.gov Identifier: NCT03096561.
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Affiliation(s)
- M Pasquier
- Emergency Department, Lausanne University Hospital, Lausanne, Switzerland.
| | - M Blancher
- Department of Emergency Medicine, SAMU 38, University Hospital of Grenoble Alps, Grenoble, France
| | - S Buse
- Department of Emergency Medicine, SAMU 38, University Hospital of Grenoble Alps, Grenoble, France
| | - B Boussat
- Department of Emergency Medicine, SAMU 38, University Hospital of Grenoble Alps, Grenoble, France
| | - G Debaty
- Department of Emergency Medicine, SAMU 38, University Hospital of Grenoble Alps, Grenoble, France
| | - M Kirsch
- Department of Cardiac Surgery, Lausanne University Hospital, Lausanne, Switzerland
| | | | - P Schoettker
- Department of Anesthesiology, Lausanne University Hospital, Lausanne, Switzerland
| | - T Annecke
- Klinik für Anästhesiologie und Operative Intensivmedizin, University Hospital of Cologne, Köln, Germany
| | - P Bouzat
- Department of anesthesiology and critical care, Grenoble Alps Trauma Center, University Hospital of Grenoble, Grenoble, France
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Aksel G. May hemoglobin measurement by blood gas analyzer lead to severe adverse clinical consequences? Reply to letter to the editor. Am J Emerg Med 2019; 38:395. [PMID: 31431307 DOI: 10.1016/j.ajem.2019.158395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 08/13/2019] [Indexed: 11/29/2022] Open
Affiliation(s)
- Gökhan Aksel
- University of Health Sciences, Umraniye Training and Research Hospital, Department of Emergency Medicine, Istanbul, Turkey.
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Murphy PT. Inaccurate haemoglobin measurement by blood gas analyzer may lead to severe adverse clinical consequences. Am J Emerg Med 2019; 38:395. [PMID: 31427161 DOI: 10.1016/j.ajem.2019.158396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 08/13/2019] [Indexed: 11/30/2022] Open
Affiliation(s)
- Philip T Murphy
- Department of Hematology and Blood Transfusion, Beaumont Hospital, Beaumont Rd, Dublin 9, Ireland.
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Bland-Altman analysis: A paradigm to understand correlation and agreement. Turk J Emerg Med 2018; 18:139-141. [PMID: 30533555 PMCID: PMC6261099 DOI: 10.1016/j.tjem.2018.09.001] [Citation(s) in RCA: 150] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 09/10/2018] [Accepted: 09/11/2018] [Indexed: 11/22/2022] Open
Abstract
The rapid increase in the number of new laboratory methods has led to the necessity of reliable verification methods. Validation of a new measurement method for application to medical practice requires comparison with gold standard techniques. The Bland-Altman analysis is a frequently applied technique in studies that investigate the agreement between two methods of the same medical measurement. In this review, potential areas of usage of Bland-Altman analysis is elaborated from a clinical viewpoint, and possible pitfalls in study designs are discussed in statistical perspective.
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