| 摘要 |
An apparatus for detecting an injection port subcutaneously implanted in a patient includes a magnetic device, such as a permanent magnet or a solenoid, that emits a local magnetic field, and a magnetic detector, preferably including at least one Hall element, that detects the local magnetic field. The magnetic device is designed to be subcutaneously implanted in the patient at the implanted injection port, and the magnetic detector is movable externally along the patient's body to establish an injection position at the patient's skin in front of the implanted injection port where the local magnetic field emitted by the magnetic device is detected by the magnetic detector. As a result, an injection needle can be placed in the established injection position, in order to insert the injection needle through the patient's skin directly into the injection port substantially in the centre thereof.
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