Patent US3755811A successfully refreshed from Google Patents.
Patent US4653498A successfully refreshed from Google Patents.
US4653498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse oximeter monitor
Assignee: Nellcor Puritan Bennett LLC
•
Filing: 1986-05-20
•
Granted: 1987-03-31
•
Expires: 2006-05-20
Abstract
Abstract A display monitor is disclosed for a pulse oximeter of the type wherein light of two different wavelengths is passed through body tissue, such as a finger, an ear or the scalp, so as to be modulated by the pulsatile component of arterial blood therein and thereby indicate oxygen saturation. A tonal signal is emitted having a pitch proportional to the ratio of oxygen saturation and a sequential repetition proportional to pulse. A visual cue consisting of an array of strobed light emitting diodes is flashed having a total light output proportional to the magnitude of the pulse and a sequential flashing rate proportional to pulse rate. A systematic rejection of extraneous or irregular detected data prevents undue sounding of alarms.
Inventors
- 👤 William New, Jr.
- 👤 James E. Corenman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/1455; A61B5/14551; A61B2505/00; A61B2505/03
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
174 words
An oximeter apparatus for use in measuring pulse rate and oxygen saturation of blood by means of absorption of optical radiation through living tissue comprising: first and second light sources for emitting light at a first and second wavelength, respectively; a light sensor; said light sources and light sensor being adapted to be addressed to said tissue to define a light path through said tissue between said light sources and said light sensor; means for detecting signals corresponding to light received by said light sensor at each of said first and second wavelengths and for deriving from said signals a pulsatile signal corresponding to a pulsatile characteristic of arterial blood flow and generating a signal corresponding to oxygen saturation of the blood; and means for generating an audible intermittent tone signal, said tone signal generating means further comprising means responsive to said pulsatile signal for controlling the occurrence of said audible tone signal, and means responsive to said oxygen saturation signal for varying the tonal frequency of said audible tone signal with oxygen saturation.
Claim 2
Dependent Claim
174 words
An oximeter apparatus for use in measuring pulse rate and oxygen saturation of blood by means of absorption of optical radiation through living tissue comprising: first and second light sources for emitting light at a first and second wavelength, respectively; a light sensor; said light sources and light sensor being adapted to be addressed to said tissue to define a light path through said tissue between said light sources and said light sensor; means for detecting signals corresponding to light received by said light sensor at each of said first and second wavelengths and for deriving from said signals a pulsatile signal corresponding to a pulsatile characteristic of arterial blood flow and generating a signal corresponding to oxygen saturation of the blood; and means for generating an audible intermittent tone signal, said tone signal generating means further comprising means responsive to said pulsatile signal for controlling the occurrence of said audible tone signal, and means responsive to said oxygen saturation signal for varying the tonal frequency of said audible tone signal with oxygen saturation.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1 wherein said means for varying the tonal frequency of said audible signal comprises means for decreasing said tonal frequency with decreasing oxygen saturation.
Claim 4
Dependent Claim
49 words
The apparatus of claim 1 further comprising: an array of lights; circuit means coupled to receive said pulsatile signal from said detecting means for flashing said lights; and circuit means for varying the number of said lights which are flashed in relation to the intensity of said pulsatile signal.
References Cited (Backward Citations)
US2706927A
Cited
US3565058A
Cited
US3638640A
Cited
FR1589461A
Cited
US3658060A
Cited
US3895316A
Cited
US4013067A
Cited
US4052977A
Cited
US3998550A
Cited
US4038976A
Cited
US4109643A
Cited
US4167331A
Cited
US4266554A
Cited
GB2039364A
Cited
WO1982001948A1
Cited
US4424814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |