The Medtronic Teletrace 9531 (including the 9531PW variant) is a legacy device from the 1990s that functions as a portable transtelephonic electrocardiograph (ECG) and transmitter.
Key Features and Purpose
• Device Type: A portable unit designed for remote (transtelephonic) heart rhythm monitoring and pacemaker checks.
• Operating Principle: It allowed patients to record their heart’s electrical activity (ECG) at home and transmit the audio signal (ECG data) over a standard telephone line to a physician or diagnostic center.
• Special Features: It was often supplied with a specialized circular magnet—referred to as a "doughnut magnet"—used to interact with implanted pacemakers during telemetry checks.
• Status: This model has long been discontinued and is now considered obsolete or "vintage." In clinical practice, it has been superseded by modern digital remote monitoring systems (such as the Medtronic CareLink product line).