Medical instrument with a shutter for sealing a test strip port

A method of operating a medical instrument, wherein the medical instrument is an analyzer for performing a measurement on a biological sample using a test strip, wherein the medical instrument comprises an analytical unit for analyzing the test strip, wherein the analytical unit comprises a test strip mount configured for receiving the test strip to perform the measurement;

• a test strip port configured for receiving the test strip, wherein the test strip port is aligned with the test strip mount along an insertion direction;
• and a shutter movable between an open position and a closed position, the shutter comprises a test strip opening, wherein the test strip opening is aligned with the test strip port and the test strip mount when the shutter is in the open position, wherein the shutter comprises a shutter mechanism that rotates the shutter parallel to the insertion direction about a rotational axis to move the shutter between the open position and the closed position;
• and wherein the method comprises the steps of:
• rotating the shutter mechanism parallel to the insertion direction about the rotational axis to move the shutter to the open position;
• placing the biological sample on the test strip;
• inserting the test strip into the test strip port such that the test strip passes through the test strip opening and into the test strip mount;
• analyzing the test strip with the analytical unit to perform the measurement;
• removing the test strip from the medical instrument;
• and rotating the shutter mechanism parallel to the insertion direction about the rotational axis to move the shutter to the closed position.