초록 ▼

The present invention relates to an extracorporeale interface unit (8), for an intravascular measurement system for measuring at least one physiological, or other, variable in a living body, adapted to generate a sensor signal in response of the variable. The interface unit (8) comprises a sensor in

The present invention relates to an extracorporeale interface unit (8), for an intravascular measurement system for measuring at least one physiological, or other, variable in a living body, adapted to generate a sensor signal in response of the variable. The interface unit (8) comprises a sensor interface circuitry (6) adapted to interface a sensor wire configured to be inserted into the living body and provided with one or many sensor element(s) at its distal region. The sensor interface circuitry (6) comprises a measurement unit (9) adapted to generate the measured data of the variable as a sensor signal. The interface unit (8) further comprises a control unit (1) adapted to control and supervise the different functions of the interface unit (8), wherein the different functions are performed by predefined tasks (T1, T2 . . . TN) during consecutive control periods CP having the same time duration.

대표청구항 ▼

1. An extracorporeale interface unit, for an intravascular measurement system for measuring at least one physiological, or other, variable in a living body, adapted to generate a sensor signal in response to said variable, which interface unit comprises: a sensor interface circuitry adapted to inter

1. An extracorporeale interface unit, for an intravascular measurement system for measuring at least one physiological, or other, variable in a living body, adapted to generate a sensor signal in response to said variable, which interface unit comprises: a sensor interface circuitry adapted to interface a sensor wire configured to be inserted into the living body and provided with one or more sensor elements at its distal region, the sensor interface circuitry being configured to generate measured data of said variable as a sensor signal;a controller configured to control and supervise functions of the interface unit, wherein the functions are performed by predefined tasks (T1, T2, . . . , Tn) during consecutive control periods having the same time duration tcp, and that during each task (T1, T2, . . . , Tn) a predefined function of the interface unit is performed,wherein each predefined task (T1, T2, . . . , Tn) has a designated task time period length (t1, t2, t3, . . . , tn), and only one task (T1, T2, . . . , Tn) is adapted to be executed at the same time and each task (T1, T2, . . . , Tn) in a control period has a designated task time slot within said control period, wherein the tasks (T1, T2, . . . , Tn) within a control period are separated by a specified task separation time period ts andwherein said sensor interface circuitry comprises two distinct current source units (CSU1, CSU2) adapted to energize said one or more sensor elements via at least two connection points (CP1, CP2, . . . , CPn), and a switching unit, wherein said switching unit is adapted to alternately switch connection between said current source units (CSU1, CSU2) and at least two of said connection points (CP1, CP2, . . . , CPn) from one control period to a subsequent control period, and wherein each connection is maintained during one of said predefined tasks (T1, T2, . . . , Tn), having a task time period length (t1, t2, t3, . . . , tn). 2. The interface unit according to claim 1, wherein said functions include one or more of, measuring said at least one variable, processing measured data, performing radio communication with external devices, performing electrical stimulation of tissue, or performing ablation of tissue. 3. The interface unit according to claim 1, wherein a predefined task (T1, T2 . . . Tn) has a designated execution frequency rate of 50-500 Hz. 4. The interface unit according to claim 1, wherein said designated execution frequency rate determines if the predefined task (T1, T2 . . . Tn) is executed every control period, or every second control period, or every third control period, or every fourth control period, etc. 5. The interface unit according to claim 1, wherein said circuitry is adapted to be energized by at least one energy source. 6. The interface unit according to claim 5, wherein said energy source is switched off during said task separation time period ts. 7. The interface unit according to claim 1, wherein said task separation time period ts is approximately 10-1000 μs. 8. The interface unit according to claim 1, wherein said task time period length (t1, t2, t3, . . . , tn) is essentially the same for each connection, and that said sensor interface circuitry is adapted to determine a sensor variable value (Vdiff) related to said variable at two of said connection points (CP1, CP2, . . . CPn). 9. The interface unit according to claim 8, wherein said sensor signal is related to average value of sensor variable values (Vdiff) from at least two task time period lengths (t1, t2, t3, . . . , tn). 10. The interface unit according to claim 1, wherein said time duration of said control periods is between 0.5-20 ms. 11. The interface unit according to claim 10, wherein said time duration of said control periods is approximately 2.5 ms. 12. The interface unit according to claim 5, wherein said functions include one or more of, measuring said at least one variable, processing measured data, performing radio communication with external devices, performing electrical stimulation of tissue, or performing ablation of tissue, and wherein said energy source is adapted to energize one or more of said functions. 13. The interface unit according to claim 1, wherein said interface unit is arranged in a transceiver unit adapted to transfer said sensor signal via a wireless connection to an external device. 14. The interface unit according to claim 1, wherein said interface unit is arranged in a connector unit adapted to transfer said sensor signal via a cable connection to an external device. 15. A measurement system, for intravascular measurements of at least one physiological, or other, variable in a living body, comprising: a sensor wire, adapted to be inserted into the body, comprising a sensor element arranged in a distal region of said sensor wire;an external device, adapted to receive measured data;wherein the measurement system comprises an extracorporeale interface unit according to claim 1, adapted to be connected to a proximal end of said sensor wire.