Comparative study between a medical device and reagent dipsticks in measuring pH.

Abstract:

OBJECTIVES:Urinary pH is a decisive factor in several pathologies, there by an informative marker employed in treatment decisions. Although extensively used, the urinary pH dipstick test may not be sufficiently accurate or precise for clinical decisions and more robust methodologies need to be considered. In this study, we compare pH measurements when using aportable medical device and different dipstick tests. MATERIALS AND METHODS:Four pH dipstick brands and a Lit-Control® pH Meter were tested using commercial buffer solutions with seven distinct pH values representing the physiological range in urine (4.66; 5.0;5.5; 6.0; 7.0; 7.5; 8.0). A statistical analysis was performed to assess the correlation of measured versus real values, together with validity measures as resolution,precision and accuracy. RESULTS:Validity measures stated the superiority of the portable pH meter, with a reduced dispersion of data and more exact values. Additionally, correlation analysis demonstrate that the pH values obtained with the pH meter were the closest to the buffers' real pH values. CONCLUSION:The detailed comparative study presented here reveal the superiority of a portable pH meter to several of the most used dipstick brands in the clinic.Lit-Control® pH Meter represents a reliable alternative when a monitoring of urinary pH is needed, as may happen during the screening of diseases or treatment monitoringin the clinic, as well as during the self-monitoringby the patient under professional supervision at home. OBJETIVOS:El pH urinario es un factor decisivo en varias patologías, en consecuencia, un marcador informativo empleado en las decisiones de tratamiento. Aunque ampliamente utilizada, la tira reactiva puede no ser lo suficientemente acurada o precisa para la toma de decisiones clínicas y otras metodologías más robustas deben ser consideradas. En este estudio,comparamos las mediciones de pH cuando usamos un dispositivo médico portátil y diferentes tiras reactivas. MATERIALES Y MÉTODOS: Se probaron cuatro marcas de tiras reactives de pH y un medidor de pH, Lit-Control® pH Meter, utilizando soluciones tampón comerciales con siete valores de pH distintos que representan el rango fisiológico de pH en orina (4.66; 5.0; 5.5; 6.0;7.0; 7.5; 8.0). Se realizó un análisis estadístico para evaluar la correlación de los valores medidos versus los reales, junto con las medidas de validez como resolución,precisión y exactitud. RESULTADOS:Las medidas de validez indicaron la superioridad del medidor de pH portátil, con una reducción de la dispersión de los datos y valores más exactos. Además, el análisis de correlación demuestra que los valores de pH obtenidos con el medidor de pH fueron los más cercanos a los valores de pH reales de los tampones.CONCLUSIÓN: El estudio comparativo detallado presentado aquí revela la superioridad de un medidor portátil de pH frente algunas de las marcas comerciales de tiras reactivas más ampliamente usadas en las práctica clínica. El Lit-Control® pH Meter representa una alternativa fiable cuando se necesita un monitoreo del pH urinario, como puede suceder durante la detección de enfermedades o la monitorización del tratamiento a nivel clínico, así como durante el autocontrol domiciliario del paciente, bajo supervisión profesional.

journal_name

Arch Esp Urol

authors

Angerri O,Pascual D,Haro J,Fernández X,Chiganças V,Garganta R,Cuñé J

subject

Has Abstract

pub_date

2020-07-01 00:00:00

pages

546-553

issue

6

eissn

0004-0614

issn

1576-8260

pii

2020-73-6-361464b3a825b2f48c1bc2b7b9c3c2f99f555c1e

journal_volume

73

pub_type

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