# US 2014/0194766 A1 · Respiratory monitoring

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- Number: US 2014/0194766 A1
- Document ID: US20140194766A1
- Status: Published application
- Kind: A1
- Application number: 14/153,656
- Filed: 2014-01-13
- Published: 2014-07-10
- Earliest claimed: 2006-05-31
- Assignees: Masimo Corporation
- Applicants: MASIMO Corporation
- Inventors: Ammar Al-Ali; Mohamed K. Diab
- Web page: https://patentgrep.com/patent/US20140194766A1

## CPC

- A61B 5/0836: {Measuring rate of CO2 production}
- A61B 5/0004: {characterised by the type of physiological signal transmitted}
- A61B 5/0816: {Measuring devices for examining respiratory frequency (measuring frequency of electric signals G01R23/00)}
- A61B 5/097: Devices for facilitating collection of breath or for directing breath into or through measuring devices
- A61B 5/6819: {Nose}
- A61B 5/682: {Mouth, e.g., oral cavity; tongue; Lips; Teeth}
- A61B 5/6822: {Neck}
- A61M 16/0666: {Nasal cannulas or tubing (devices for improving normal breathing through the nose A61F5/08; nose filters A62B23/06; outside holding devices A61M25/02)}
- A61M 16/0672: {Nasal cannula assemblies for oxygen therapy}
- A61M 16/10: Preparation of respiratory gases or vapours
- A61M 16/085: {Gas sampling}
- A61M 16/1065: {in the expiratory path}
- A61M 2202/0208: Oxygen
- A61M 2205/18: with alarm
- A61M 2205/3561: local, e.g. within room or hospital
- A61M 2205/581: by audible feedback
- A61M 2205/583: by visual feedback
- A61M 2230/42: Rate
- A61M 2230/432: partial CO2 pressure (P-CO2)
- A61M 2230/435: partial O2 pressure (P-O2)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

A patient interface in accordance with one embodiment of the present invention is configured to be at least partially carried by a patient and to receive gas exhaled by the patient. The patient interface includes first and second cannula tubes each having a first end and a second end, the first ends are configured to be inserted into the nostrils of a patient, the first and second cannula tubes are configured to direct exhaled gas from the patient from the first ends to said second ends. The patient interface also includes first and second sensors positioned near the second ends, and the first and second sensors are configured to provide first and second signals based upon the gas, wherein the first and second signals are indicative of a physiological parameter of the patient. The patient interface also includes a communications link configured to provide the signal to a physiological monitor.

## Claims

### Claim 1

(canceled)

### Claim 2

A method of detecting a physiological parameter of a patient, comprising:
receiving, in a sensing module, gas exhaled by a patient, the sensing module comprising:
a plurality of sensors each configured, when activated, to provide a signal indicative of a physiological parameter of the patient based on the gas; and
a sensor selector configured to cause the gas exhaled by the patient to be directed to an active sensor, the active sensor selected from the plurality of sensors.

### Claim 3 (depends on 2)

The method of claim 2, wherein when a predetermined event occurs, the sensor selector directs the gas to a second sensor selected from the plurality of sensors.

### Claim 4 (depends on 3)

The method of claim 3, wherein the predetermined event is at least one of:
an accuracy of the active sensor falling below a predetermined level, an end of a useful life of the active sensor, a passing of a predetermined amount of time, or a triggering of an alarm based on an expiration of a timer.

### Claim 5 (depends on 2)

The method of claim 2, wherein at least one of the plurality of sensors does not receive gas at a particular time.

### Claim 6 (depends on 2)

The method of claim 2, wherein the sensing module is configured to be suspended from the neck of the patient.

### Claim 7 (depends on 2)

The method of claim 2, wherein the sensor selector comprises at least one of a rotatable plate, a slidable plate, or one or more valves.

### Claim 8 (depends on 2)

The method of claim 2 further comprising:
providing the signal to a physiological monitor via a communications link.

### Claim 9 (depends on 2)

The method of claim 2, wherein at least one of the plurality of sensors comprises at least one of a nanotechnology sensor or an infrared sensor.

### Claim 10 (depends on 2)

The method of claim 2, wherein the signal is indicative of at least one of a carbon dioxide concentration of the gas or a respiratory rate of the patient.

### Claim 11

A sensing module configured to receive exhaled gas by a patient via a cannula tube and detect a physiological parameter of a patient, the sensing module comprising:
a plurality of sensors each configured, when activated, to provide a signal indicative of a physiological parameter of the patient based on the gas; and
a sensor selector configured to cause the gas exhaled by the patient to be directed to an active sensor, the active sensor selected from the plurality of sensors.

### Claim 12 (depends on 11)

The sensing module of claim 11, wherein when a predetermined event occurs, the sensor selector directs the gas to a second sensor selected from the plurality of sensors.

### Claim 13 (depends on 11)

The sensing module of claim 11, wherein at least one of the plurality of sensors does not receive gas at a particular time.

### Claim 14 (depends on 11)

The sensing module of claim 11, wherein the sensor selector comprises at least one of a rotatable plate, a slidable plate, or one or more valves.

### Claim 15 (depends on 11)

The sensing module of claim 11, wherein the sensing module is configured to be suspended from a neck of the patient.

### Claim 16 (depends on 11)

The sensing module of claim 11, wherein the sensor selector is configured to control a location of at least one of the plurality of sensors within the sensing module.

### Claim 17 (depends on 11)

The sensing module of claim 11, wherein the sensor selector is configured to direct the gas from a first sensor to a second sensor before the useful life of the first sensor ends.

### Claim 18

A patient interface configured to receive gas exhaled by a patient, said patient interface comprising:
a sensor configured to receive exhaled gas by a patient and provide a signal indicative of a physiological parameter of the patient based on the gas; and
an information element coupled to the sensor, wherein the information element includes calibration information regarding the sensor.

### Claim 19 (depends on 18)

The patient interface of claim 18, further comprising a communications link configured to provide the signal to a physiological monitor.

### Claim 20 (depends on 18)

The patient interface of claim 18, wherein the sensor comprises at least one of a nanotechnology sensor or an infrared sensor.

### Claim 21 (depends on 18)

The patient interface of claim 18, wherein the signal is indicative of at least one of a carbon dioxide concentration of the gas or a respiratory rate of the patient.