Cables for patient monitoring and related systems with integrated front end

• US 9,198,620 B2
• Filed: 08/05/2014
• Issued: 12/01/2015
• Est. Priority Date: 12/22/2009
• Status: Active Grant

• Current Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd. (Excelsior Union Ltd.)
• Original Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd. (Excelsior Union Ltd.)
• Inventors: Balji, Jack, Rajagopalan, Cadathur, Eaton, Scott
• Primary Examiner(s): Leja, Ronald W
• Application Number:
  US14/452,410
• Publication Number:
  US 20140350416A1
• Time in Patent Office: 483 Days
• Field of Search: 361/437
• US Class Current: 1/1
• CPC Class Codes: A61B 2562/222 Electrical cables or leads therefor, e.g. coaxial cables or ribbon cables
• CPC Class Codes: A61B 2562/227 Sensors with electrical connectors
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• CPC Class Codes: A61B 5/002 Monitoring the patient using a local or closed circuit, e.g. in a room or building A61B5/0017 takes precedence
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/02152 specially adapted for venous pressure
• CPC Class Codes: A61B 5/031 Intracranial pressure
• CPC Class Codes: A61B 5/7225 Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation A61B5/30, A61B5/316 take precedence; transformers for specific applications H01F38/00; amplifiers H03F
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence

Abstract

Patient monitoring systems can include a system for transmitting information from a patient parameter sensor to a patient monitor. The system can include an analog-to-digital converter close to the patient parameter sensor and can transmit digital signals through a cable to the patient monitor.

Claims

1. A patient monitoring system comprising:

a patient monitor configured to display information regarding a patient, wherein the patient monitor comprises a first port and a first wireless communicator;

a cable comprising a proximal end and a distal end, and further comprising;

a cable body that extends between the proximal and distal ends, wherein the proximal end of the cable comprises a first connector configured to electrically couple the cable body with the first port of the patient monitor;

wherein the distal end comprises a connector comprising a distal interface configured to selectively couple with a patient parameter sensor and receive analog signals from the patient parameter sensor; and

a first circuit, the first circuit comprising a front-end processing module configured to condition the analog signals from the patient parameter sensor and convert the analog signals into digital signals, wherein the first circuit is external to the patient monitor, wherein the first circuit comprises a second wireless communicator to wirelessly communicate the digital signals to the patient monitor, and wherein the first circuit is at a distance of no less than about 3.0 feet from the distal interface along a length of the cable body to limit a distance over which the analog signal is transmitted over the cable;

wherein the cable body comprises one or more power leads that are configured to provide electrical power from the first port of the patient monitor to one or more of the distal interface and the first circuit.

2. The system of claim 1, wherein the patient monitor is configured to process digital information received from the first circuit in any of two or more operational modes, wherein the first circuit is configured to communicate an operational state of the first circuit to the patient monitor, and wherein the patient monitor is configured to automatically process said digital information received from the first circuit in an operational mode that corresponds with the communicated operational state of the first circuit.

3. The system of claim 2, wherein the first circuit is configured to transition among two or more operational states, and wherein each of said operational states corresponds with an operational mode of the patient monitor.

4. The system of claim 3, wherein the cable further comprises an actuator electrically coupled with the first circuit, wherein the actuator is configured to transition the first circuit among the two or more operational states.

5. The system of claim 3, further comprising a display external to the patient monitor configured to provide a visually perceivable representation of a current operational state of the first circuit.

6. A system configured to provide digital signals to a patient monitor, the system comprising:

a cable comprising a proximal end and a distal end, and further comprising;

a cable body that extends between the proximal and distal ends, wherein the proximal end of the cable comprises a first connector configured to electrically couple the cable body with the first port of the patient monitor;

a distal electrical interface at the distal end configured to receive analog signals from a patient parameter sensor; and

a circuit, wherein the circuit is configured to condition the analog signals from the patient parameter sensor and convert the analog signals into digital signals, and wherein the circuit comprises a wireless communicator to wirelessly communicate the digital signals to a patient monitor to limit a distance over which the analog signal is transmitted over the cable;

wherein the cable body comprises one or more power leads that are configured to provide electrical power from the first port of the patient monitor to one or more of the distal interface and the first circuit.

7. The system of claim 6, wherein the first circuit is at a distance of no more than about 3.0 feet from the distal end along a length of the cable.

8. The system of claim 6, wherein the circuit is within a housing that defines a volume of no more than about 5.0 cubic inches.

9. The system of claim 6, wherein the circuit is integral with the cable.

10. The system of claim 6, further comprising an actuator electrically coupled with the circuit, wherein the actuator is configured to transition the circuit among two or more operational states.

11. The system of claim 10, further comprising a display electrically coupled with the circuit, wherein actuation of the actuator is configured to alter information depicted via the display.

12. The system of claim 6, further comprising an actuator electrically coupled with the circuit, wherein actuation of the actuator is configured to effect one or more of zeroing of a patient parameter sensor when the sensor is coupled with the distal electrical interface, instigation of a measurement of blood pressure via a noninvasive blood pressure sensor when the sensor is coupled with the electrical interface, instigation of a diagnostic check of the cable, access of information stored in a memory portion of the circuit, alteration of information stored in a memory portion of the circuit, erasure of information stored in a memory portion of the circuit, and storage of information in a memory portion of the circuit.

13. The system of claim 6, further comprising a patient parameter sensor coupled with the distal electrical interface.

14. The system of claim 13, wherein the cable comprises the circuit.

15. A system configured to provide signals to a patient monitor, the system comprising:

a cable comprising a proximal end and a distal end, and further comprising a cable body that extends between the proximal and distal ends;

a distal electrical interface at the distal end configured to receive signals from a patient parameter sensor;

a circuit in communication with the proximal electrical interface, wherein the circuit is configured to condition the analog signals from the patient parameter sensor and convert the analog signals into digital signals and to wirelessly transmit the digital signals to a patient monitor; and

an actuator electrically coupled with the circuit, wherein the actuator is configured to allow selection of an operational state of the circuit corresponding to a type of patient parameter sensor;

wherein the cable body comprises one or more power leads that are configured to provide electrical power from the patient monitor to one or more of the distal interface and the first circuit.

16. The system of claim 15, wherein actuation of the actuator is configured to effect one or more of zeroing of a patient parameter sensor when the sensor is coupled with the electrical interface, instigation of a measurement of blood pressure via a noninvasive blood pressure sensor when the sensor is coupled with the electrical interface, instigation of a diagnostic check of the cable, access of information stored in a memory portion of the circuit, alteration of information stored in a memory portion of the circuit, erasure of information stored in a memory portion of the circuit, and storage of information in a memory portion of the circuit.

17. The system of claim 15, wherein the actuator is no further than about 3.0 feet from the distal end of the cable when the system is in an assembled state and the cable is fully extended.

18. A method of communicating a signal to a patient monitor, the method comprising:

providing a cable having a distal end coupled with a patient parameter sensor and a proximal end configured to electrically couple with a first port of the patient monitor, wherein the cable comprises a circuit and an actuator;

receiving an indication of an operational state of the circuit via the actuator;

obtaining an analog signal via the patient parameter sensor;

conditioning and converting the analog signal to a digital signal, using the circuit, according to the operational state of the circuit; and

wirelessly transmitting the digital signal to the patient monitor to limit a distance over which the analog signal is transmitted over the cable, wherein the cable comprises one or more power leads that are configured to provide electrical power from the first port of the patient monitor to one or more of the patient parameter sensor and the first circuit.

19. The method of claim 18, wherein conditioning and converting the analog signal to a digital signal comprises conditioning and converting using a circuit that is positioned no more than about 3.0 feet from the distal end along a length of the cable.