Patient cable sensor switch
US6165005A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1999 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Dec 7, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/227
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A sensor switch located in a patient cable adapts an incompatible sensor to a monitor in a pulse oximetry system. The sensor switch is particularly suited to adapting sensors to a monitor that utilizes an open-circuit detector to determine a no-sensor condition. A compatible sensor short-circuits the inputs to the open-circuit detector to indicate sensor presence. An incompatible sensor has such no short-circuit feature and fails to work on such a monitor. An incompatible sensor attached to a sensor connector at one end of the patient cable, however, actuates the sensor switch. The sensor switch, in turn, short-circuits the open-circuit detector inputs when the monitor is attached to a monitor connector at the opposite end of the patient cable. Thus, the sensor switch simulates the presence of a compatible sensor to the monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.