An Accuracy Study of Defibrillator Performance Measurement at Songklanagarind Hospital, Thailand
Abstract
Objective: To assess and validate the accuracy and reliability of key parameters. The performance of manual external defibrillators (MEDs) at Songklanagarind Hospital was evaluated.
Material and Methods: This study sampled 60% of the defibrillators from various departments and brands within the hospital. Key performance parameters, including delivered energy output, charge time, and synchronized time, were evaluated against the specified tolerance limits outlined by manufacturer specifications and industry standards. The accuracy of delivered energy was assessed by integrating absolute error and %relative error, along with expanded uncertainty (U(E)). The acceptable charge time was defined as not exceeding 15 seconds, while the discharge in synchronized mode was required to occur within 60 milliseconds.
Results: The findings demonstrated that all the tested models showed a high degree of accuracy in delivered energy. Additionally, the mean charge time for all defibrillators followed the 15-second threshold established by both manufacturer specifications and universally recognized standards. Furthermore, the synchronized shock delivery capability of all 3 defibrillator models successfully met the critical 60-millisecond timeframe essential for clinical efficacy. These validated results confirm that the evaluated parameters consistently fell within acceptable ranges, thereby substantiating the reliability of these models in assessing defibrillator performance.
Conclusion: These findings emphasize the significance of assessing the reliability and accuracy of the MEDs through calibration techniques for continuous monitoring and regular maintenance. These devices are imperative to guarantee adherence to the prescribed standards before medical practice.
Keywords
Full Text:
PDFReferences
Josephson ME. Sudden cardiac arrest. Indian Heart J 2014;66:S2–3.
Kerber RE. Chapter 46. Indications and Techniques of Electrical Defibrillation and Cardioversion Hurst’s The Heart, 13ed. New York, NY: McGraw-Hill; 2011.
Ljubotina M. Inspection and testing of defibrillators. In: Badnjević A, Cifrek M, Magjarević R, Džemić Z, editors. Inspection of Medical Devices. Singapore: Springer Singapore; 2018 [cited 2024 Jan 30]. p. 161–79. (Series in Biomedical Engineering).
Kerber RE, Grayzel J, Hoyt R, Marcus M, Kennedy J. Transthoracic resistance in human defibrillation. Influence of body weight, chest size, serial shocks, paddle size and paddle contact pressure. Circulation 1981;63:676–82.
Gurbeta L, Dzemic Z, Bego T, Sejdic E, Badnjevic A. Testing of anesthesia machines and defibrillators in healthcare institutions. J Med Syst 2017;41:1–10.
Heyer Y, Baumgartner D, Baumgartner C. A systematic review of the transthoracic impedance during cardiac defibrillation. Sensors 2022;22:2808.
Lerman BB, Deale OC. Relation between transcardiac and transthoracic current during defibrillation in humans. Circ Res 1990;67:1420–6.
International Electrotechnical Commission. IEC 60601-1-1 medical electrical equipment-part 1: general requirements for safety 1: collateral standard: safety requirements for medical electrical systems. 2000.
Medical electrical equipment Particular requirements for the basic safety and essential performance of cardiac defibrillators. Definitive 2019.
Gum J. Guide to the expression of uncertainty in measurement- Part 6: Developing and using measurement models.
Dreyfuss A, Carlson GK. Defibrillation in the Cardiac Arrest Patient. Emerg Med Clin North Am 2023;41:529–42.
Baura GD. External Defibrillators. In: Medical Device Technologies. Elsevier; 2012 [cited 2024 Jan 25]. p. 83–102.
Rhee BJ, Zhang Y, Boddicker KA, Davies LR, Kerber RE. Effect of hypothermia on transthoracic defibrillation in a swine model. Resuscitation 2005;65:79–85.
Hansen LK, Folkestad L, Brabrand M. Defibrillator charging before rhythm analysis significantly reduces hands-off time during resuscitation: a simulation study. Am J Emerg Med 2013;31:395–400.
Sra J, Biehl M, Blanck Z, Dhala A, Jazayeri MR, Deshpande S, et al. Spontaneous reinitiation of atrial fibrillation following transvenous atrial defibrillation. Pacing Clin Electrophysiol 1998;21:1105–10.
Nolan JP, Sandroni C, Böttiger BW, Cariou A, Cronberg T, Friberg H, et al. European resuscitation council and european society of intensive care medicine guidelines 2021: post-resuscitation care. Resuscitation 2021;161:220–69.
Refbacks
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.