DIGITAL PULSE OXIMETER WITH AUTOMATIC DIRECTION-CHANGING FUNCTION

• US 20140088387A1
• Filed: 09/24/2012
• Published: 03/27/2014
• Est. Priority Date: 09/24/2012
• Status: Active Grant

• Current Assignee: Contec Medical Systems Company Limited
• Original Assignee: Contec Medical Systems Company Limited
• Inventors: Hu, Kun, Xu, Yunlong, Zhang, Jinling, Zhao, Yatao, Song, Zhichao
• Granted Patent: US 9,474,477 B2
• Time in Patent Office: Days
• US Class Current: 600/340
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence

Abstract

A digital pulse oximeter with automatic orientation change function, comprising a housing that is configured to clamp a human finger being tested, a display window disposed at outside of and atop the housing, a circuit being disposed within the housing for calculating and analyzing the tested signals, and displaying them in the display window atop the housing via a display, wherein the said circuit has only one control key disposed on the housing, the said circuit allowing the display contents of the display to be always oriented properly for easy reading by connecting with one two-axis or three-axis accelerometer. The digital pulse oximeter of the present invention is featured with small size and convenient operation and can shift from one function to another using only one control key in conjunction with the interface display, thereby increasing the functions of small-sized pulse oximeters. The present invention uses accelerometers to judge the placing location of the apparatus without the need for any operation from the user, and the apparatus can automatically change the display orientation of the display, thus providing great convenience to the user.

Claims

1. A digital pulse oximeter with automatic orientation change function, comprising a housing that is configured to clamp a human finger being tested, a display window disposed at outside of and atop the housing, a circuit being disposed within the housing for calculating and analyzing tested signals, and displaying them in the display window atop the housing via a display, wherein the said circuit has only one control key disposed on the housing and the said circuit allowing display contents of the display to be always oriented properly for easy reading by connecting with one two-axis accelerometer or three-axis accelerometer.

2. The digital pulse oximeter with automatic orientation change function as claimed in claim 1, wherein the said housing consists of an upper housing body and a lower housing body, the upper housing body and the lower housing body being disposed such that they are stacked together, one end of both the upper housing body and the lower housing body being a measurement end where a finger is placed, a pivot and a reset spring disposed between the upper housing body and the lower housing body enabling them to be opened and closed at the measurement end.

3. The digital pulse oximeter with automatic orientation change function as claimed in claim 1, wherein the said circuit comprising a light-frequency converter, a red infrared light emitting diode, a light-emitting driving circuit, a microprocessor module, a display and a power supply module, the said power supply module supplying power to the light-frequency converter, the red infrared light emitting diode, the light-emitting driving circuit, the microprocessor module, and the display;

the said light-frequency converter transmits the received signals that are emitted by the red infrared light emitting diode and pass through a finger to the microprocessor module;

the microprocessor module is provided with two input ends which are respectively connected with the said two-axis accelerometer or three-axis accelerometer and the control key.

4. The digital pulse oximeter with automatic orientation change function as claimed in claim 1, wherein the information displayed by the said display includes blood oxygen saturation, pulse rate, PI value, waveform, and bar graph;

the display modes of the display include large digital display, small digital display and simultaneous display of both waveform and digital.

5. The digital pulse oximeter with automatic orientation change function as claimed in claim 3, wherein the said power supply module comprises a power supply and a power supply switching control circuit, the signals of the control key are connected to both the microprocessor module and the power supply switching control circuit, the microprocessor module has a power supply turn-on holding signal that is connected to the power supply switching control circuit;

when the control key is pressed down, the power supply switching control circuit acts and connects the power supply to the light-frequency converter, the red infrared light emitting diode, the light emitting driving circuit, the microprocessor module and the display;

the power supply turn-on holding signal of the microprocessor module, based on the time of press-down of the control key, decides whether the power supply switching control circuit is continuously turned on or turned off.

6. The digital pulse oximeter with automatic orientation change function as claimed in claim 3, wherein the microprocessor module judges the orientation of the pulse oximeter based on acceleration data of the two-axis accelerometer or the three-axis accelerometer, and then automatically adjusts the display orientation of the display correspondingly.

7. The digital pulse oximeter with automatic orientation change function as claimed in claim 3, wherein the microprocessor module shifts from one processing function to another according to the length of time of press-down of the control key.