# US 11,298,488 B2 · Monitoring system including mask removal and oxygen desaturation period detection

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- Number: US 11,298,488 B2
- Document ID: US11298488B2
- Status: Granted
- Kind: B2
- Application number: 16/451,206
- Filed: 2019-06-25
- Published: 2019-10-17
- Granted: 2022-04-12
- Earliest claimed: 2014-09-16
- Assignees: Truphatek International Ltd.
- Applicants: Truphatek International Ltd.
- Inventors: David Rosenblatt; Moshe Kohen; Gabriel Dan; Tamer Aita; Lilach Sahar
- Web page: https://patentgrep.com/patent/US11298488B2

## CPC

- A61M 16/0409: {with mean for closing the oesophagus}
- A61B 1/00052: {positioned at proximal end of the endoscope body}
- A61B 1/00055: {for alerting the user}
- A61B 1/00097: {Sensors}
- A61B 1/05: characterised by the image sensor, e.g. camera, being in the distal end portion
- A61B 1/267: for the respiratory tract, e.g. laryngoscopes or bronchoscopes
- A61B 5/0075: {by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy (A61B5/0071 takes precedence)}
- A61B 5/0084: {for introduction into the body, e.g. by catheters (A61B5/1459 takes precedence)}
- A61B 5/08: Measuring devices for evaluating the respiratory organs
- A61B 5/1032: {Determining colour of tissue for diagnostic purposes}
- A61B 5/14542: {for measuring blood gases (A61B5/14551 takes precedence)}
- A61B 5/14551: {for measuring blood gases}
- A61B 5/1459: invasive, e.g. introduced into the body by a catheter
- A61B 5/6852: {Catheters}
- A61B 5/7282: {Event detection, e.g. detecting unique waveforms indicative of a medical condition (cough events A61B5/0823; seizures A61B5/4094; sleep apnoea A61B5/4818)}
- A61B 5/743: {Displaying an image simultaneously with additional graphical information, e.g. symbols, charts, function plots}
- A61M 16/0051: {with alarm devices}
- A61M 16/01: specially adapted for anaesthetising {(A61M16/104, A61M16/18 take precedence)}
- A61M 16/0411: {with means for differentiating between oesophageal and tracheal intubation}
- A61M 16/0488: {Mouthpieces; Means for guiding, securing or introducing the tubes (guiding or introducing with laryngoscopes A61B1/267; holding devices on the body A61M25/02)}
- A61M 16/06: Respiratory or anaesthetic masks
- G16H 20/40: relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture
- G16H 30/20: for handling medical images, e.g. DICOM, HL7 or PACS
- G16H 30/40: for processing medical images, e.g. editing
- G16H 40/63: for local operation
- G16H 50/20: for computer-aided diagnosis, e.g. based on medical expert systems
- A61B 5/72: {Signal processing specially adapted for physiological signals or for diagnostic purposes}
- A61B 2505/05: Surgical care
- A61B 2562/0223: Magnetic field sensors
- A61B 2562/0247: Pressure sensors
- A61B 2562/0257: Proximity sensors
- A61M 2202/0208: Oxygen
- A61M 2205/0272: Electro-active or magneto-active materials
- A61M 2205/3306: Optical measuring means
- A61M 2205/3317: Electromagnetic, inductive or dielectric measuring means
- A61M 2205/332: Force measuring means
- A61M 2205/3344: Measuring or controlling pressure at the body treatment site
- A61M 2205/3561: local, e.g. within room or hospital
- A61M 2205/3569: sublocal, e.g. between console and disposable
- A61M 2205/3584: using modem, internet or Bluetooth®
- A61M 2205/3592: using telemetric means, e.g. radio or optical transmission
- A61M 2205/505: Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
- A61M 2205/583: by visual feedback
- A61M 2230/205: partial oxygen pressure (P-O2)
- 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)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA

## Abstract

A method of approximating a position of an oxygen mask during a procedure includes detecting a presence of the oxygen mask based on a signal from a sensor or through an observation through an optical imaging device; determining whether the oxygen mask is close to or on a patient for supplying oxygen to the patient; detecting a removal of the oxygen mask from the patient to stop supplying oxygen to the patient; initiating a desaturation timer in response to the sensor or the optical imaging device detecting the removal of the oxygen mask from the patient; and operating an image display device to display a parameter for the oxygen desaturation timer.

## Claims

### Claim 1

A method of approximating a position of an oxygen mask during a procedure, the method comprising:
detecting a presence of the oxygen mask based on a signal from a sensor or through an observation through an optical imaging device;
determining, via the sensor or the optical imaging device, whether the oxygen mask is close to or on a patient for supplying oxygen to the patient;
detecting, via the sensor or the optical imaging device, a removal of the oxygen mask from the patient to stop supplying oxygen to the patient;
initiating, via one or more processors, a desaturation timer in response to the sensor or the optical imaging device detecting the removal of the oxygen mask from the patient;
operating, via the one or more processors, an image display device to display a parameter for the oxygen desaturation timer.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the sensor is a proximity sensor.

### Claim 3 (depends on 2)

The method according to claim 2, further comprising:
detecting a first distance between the proximity sensor and the oxygen mask;
comparing whether the first distance is less than or equal to a first distance threshold to determine whether the oxygen mask is on the patient.

### Claim 4 (depends on 3)

The method according to claim 3, further comprising:
detecting whether the oxygen mask is stationary when the oxygen mask is on the patient; and
resetting the oxygen desaturation timer when the oxygen mask is stationary.

### Claim 5 (depends on 3)

The method according to claim 3, further comprising:
setting, via the one or more processors, a second distance threshold to avoid initiating the oxygen desaturation timer where the oxygen mask has been slightly adjusted and not fully removed from the patient; and
initiating, via the one or more processors, the oxygen desaturation timer when the first distance is greater than the second distance threshold.

### Claim 6 (depends on 3)

The method according to claim 3, further comprising:
determining, where the oxygen mask has moved from the patient, whether the oxygen mask has been slightly adjusted or fully removed from the patient by comparing the oxygen mask distance to the second threshold distance; and
initiating, via the one or more processors, the oxygen desaturation timer when the oxygen mask distance is greater than the second distance threshold.

### Claim 7 (depends on 6)

The method according to claim 6, further comprising:
determining if the mask has been put back on the patient and is stationary by comparing a signal from the proximity sensor and the second distance threshold; and
resetting the oxygen desaturation timer when the oxygen mask has been put back on the patient.

### Claim 8 (depends on 1)

The method according to claim 1, wherein detecting the removal of the oxygen mask from the patient comprises determining a reduction in pressure in an oxygen supply line to the oxygen mask via a pressure sensor that registers the reduction in pressure in the oxygen supply line when the oxygen mask is removed from the patient.

### Claim 9 (depends on 1)

The method according to claim 1, further comprising:
comparing, via the one or more processors, the oxygen desaturation time to an oxygen desaturation maximum time corresponding to an elapsed time since the mask was removed from the patient, where the parameter for the oxygen desaturation timer is displayed first and most often based on a respective priority when the oxygen desaturation time is greater than the oxygen desaturation maximum time.

### Claim 10 (depends on 9)

The method according to claim 9, further comprising changing data display settings and the priority of the oxygen desaturation timer parameter when the oxygen desaturation timer is greater than or equal to the oxygen desaturation maximum time.

### Claim 11 (depends on 1)

The method according to claim 1, where the parameter for the oxygen desaturation timer changes from a numeral or time value to a text value, or to a numeral or time value and a text value.

### Claim 12 (depends on 1)

The method according to claim 1, wherein the desaturation timer is implemented in a standalone image display device.

### Claim 13 (depends on 1)

The method according to claim 1, wherein the image display device wirelessly receives a desaturation time for displaying.

### Claim 14 (depends on 1)

The method according to claim 1, wherein the desaturation timer is integrated with an anesthesia machine.