Which procedure is not currently used for point-of-care testing devices?

Which procedure is not currently used for point-of-care testing devices?

• A. Polymerase chain reaction
• B. Immunochromatography
• C. Biosensors
• D. Colorimetric detection

Answer: (A)

Point-of-care testing aims for rapid results with minimal equipment and simple steps. Polymerase chain reaction relies on amplifying nucleic acids through multiple heating and cooling cycles, plus usually performing nucleic acid extraction and purification. That requires a thermal cycler, precise temperature control, and often specialized training, so even portable PCR systems add complexity, time, and cost that go beyond typical POCT goals. In contrast, immunochromatography uses easy-to-read lateral-flow strips, colorimetric detection provides a straightforward color change, and biosensors are designed to be compact and instrument-friendly for quick readouts. These approaches fit the on-site, user-friendly philosophy of POCT far better. So the procedure not typically used for point-of-care devices is polymerase chain reaction.

Point-of-care testing aims for rapid results with minimal equipment and simple steps. Polymerase chain reaction relies on amplifying nucleic acids through multiple heating and cooling cycles, plus usually performing nucleic acid extraction and purification. That requires a thermal cycler, precise temperature control, and often specialized training, so even portable PCR systems add complexity, time, and cost that go beyond typical POCT goals. In contrast, immunochromatography uses easy-to-read lateral-flow strips, colorimetric detection provides a straightforward color change, and biosensors are designed to be compact and instrument-friendly for quick readouts. These approaches fit the on-site, user-friendly philosophy of POCT far better. So the procedure not typically used for point-of-care devices is polymerase chain reaction.