Patient cable for medical measurements
US7294785B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2004 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Oct 25, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3718
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a patient cable for medical measurements performed in connection with Magnetic Resonance Imaging (MRI). In order to eliminate the risk of thermal injuries without compromising the signal-to-noise ratio more than what is required for patient safety, the patient cable comprises two successive cable elements having different resistance characteristics. The second cable element, which is connected by the first cable element to the patient, has a total resistance increased from a normal high-conductivity resistance value of a patient cable to suppress antenna resonances in the second cable element. The first cable element, which is connected to the electrodes on the skin of the patient, has a total resistance substantially greater than that of the second cable element to prevent electromagnetically induced currents from flowing to the patient and to prevent excessive heating of the cable by electromagnetic induction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.