US5206807A
Expired / Lapsed
US
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Neonatal cardiorespirograph incorporating multi-variable display and memory
Assignee: Hill Rom Manufacturing Inc
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Filing: 1989-02-16
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Granted: 1993-04-27
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Expires: 2009-02-16
Abstract
Abstract A system and method for transducing, recording, and displaying information relating to cardiac and respiratory functions of an infant. The system and method allows immediate detection of apnea events and of bradycardia associated therewith, as well as presentation of historical charts of such events.
Inventors
- 👤 Fred L. Hatke
- 👤 Ronald S. Kolarovic
- 👤 Reagh A. Stubbs
- 👤 James A. Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:39
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/0205; A61B5/103; A61B5/11; A61B5/113; A61B5/74; A61B5/742; A61B2503/00; A61B2503/06; Y; Y02; Y02A; Y02A90/00; Y02A90/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
144 words
A method for displaying historical information related to apnea events in a human infant comprising the steps of: a) producing signals indicative of cardiac activity, and respiratory effort; b) transmitting said produced signals to a computer; c) receiving said signals into said computer; d) calculating smoothed instantaneous heart rate, respiratory effort, transthoracic impedance, and smoothed instantaneous respiration rate; e) detecting apnea and bradycardia events, storing data indicative of said events, and simultaneously displaying to a user on a single visual display: 1) a first histogram showing the absolute number of apnea events for each of a predetermined number of time intervals over a predetermined period; 2) a numeric indication of the absolute number of apnea events during said predetermined period; and 3) a second histogram showing the absolute number of apnea events for each of a predetermined number of durations during said predetermined period.
Claim 2
Independent Claim
144 words
A method for displaying historical information related to apnea events in a human infant comprising the steps of: a) producing signals indicative of cardiac activity, and respiratory effort; b) transmitting said produced signals to a computer; c) receiving said signals into said computer; d) calculating smoothed instantaneous heart rate, respiratory effort, transthoracic impedance, and smoothed instantaneous respiration rate; e) detecting apnea and bradycardia events, storing data indicative of said events, and simultaneously displaying to a user on a single visual display: 1) a first histogram showing the absolute number of apnea events for each of a predetermined number of time intervals over a predetermined period; 2) a numeric indication of the absolute number of apnea events during said predetermined period; and 3) a second histogram showing the absolute number of apnea events for each of a predetermined number of durations during said predetermined period.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein said histograms further indicate visually the number of said apnea events which coincide in time with bradycardia events.
Claim 4
Independent Claim
156 words
A method for displaying historical information related to apnea events in a human infant comprising the steps of: a) producing signals indicative of cardiac activity, and respiratory effort; b) transmitting said produced signals to a computer; c) receiving said signals into said computer; d) calculating smoothed instantaneous heart rate, respiratory effort, transthoracic impedance, and smoothed instantaneous respiration rate; e) selecting a time interval of interest to a user; f) detecting apnea and bradycardia events, storing data indicative of said events, and simultaneously displaying to a user on a single visual display: 1) a first histogram showing the absolute number of apnea events for each of a predetermined number of time intervals over a predetermined period; 2) a numeric indication of the absolute number of apnea events during said selected time interval; and 3) a second histogram showing the absolute number of apnea events for each of a predetermined number of durations during said selected time interval.
Claim 5
Independent Claim
156 words
A method for displaying historical information related to apnea events in a human infant comprising the steps of: a) producing signals indicative of cardiac activity, and respiratory effort; b) transmitting said produced signals to a computer; c) receiving said signals into said computer; d) calculating smoothed instantaneous heart rate, respiratory effort, transthoracic impedance, and smoothed instantaneous respiration rate; e) selecting a time interval of interest to a user; f) detecting apnea and bradycardia events, storing data indicative of said events, and simultaneously displaying to a user on a single visual display: 1) a first histogram showing the absolute number of apnea events for each of a predetermined number of time intervals over a predetermined period; 2) a numeric indication of the absolute number of apnea events during said selected time interval; and 3) a second histogram showing the absolute number of apnea events for each of a predetermined number of durations during said selected time interval.
Claim 6
Dependent Claim
24 words
The method of claim 3 wherein said histograms further indicate visually the number of said apnea events which coincide in time with bradycardia events.
Claim 7
Dependent Claim
42 words
The method of claim 3 wherein apnea-coupled bradycardia is indicated when said smoothed instantaneous heart rate falls below a value less than 80% of a rate calculated by averaging a predetermined number of immediately preceding rate values, and apnea has been detected.
Claim 8
Dependent Claim
30 words
The method of claim 3 wherein apnea-coupled bradycardia is indicated when said smoothed instantaneous heart rate falls below a value less than a user-defined value, and apnea has been detected.
Claim 9
Independent Claim
162 words
A method for displaying historical information related to apnea events in a human infant comprising the steps of: a) producing signals indicative of cardiac activity, and respiratory effort; b) transmitting said produced signals to a computer; c) receiving said signals into said computer; d) calculating smoothed instantaneous heart rate, respiratory effort, transthoracic impedance, and smoothed instantaneous respiration rate; e) selecting an apnea duration of interest to a user; f) detecting apnea and bradycardia events, storing data indicative of said events, and simultaneously displaying to a user on a single visual display: 1) a first histogram showing the absolute number of apnea events for said selected duration for each of a predetermined number of time intervals over a predetermined period; 2) a numeric indication of the absolute number of apnea events for said selected duration during said predetermined period; and 3) a second histogram showing the absolute number of apnea events for each of a predetermined number of durations during said predetermined period.
Claim 10
Independent Claim
162 words
A method for displaying historical information related to apnea events in a human infant comprising the steps of: a) producing signals indicative of cardiac activity, and respiratory effort; b) transmitting said produced signals to a computer; c) receiving said signals into said computer; d) calculating smoothed instantaneous heart rate, respiratory effort, transthoracic impedance, and smoothed instantaneous respiration rate; e) selecting an apnea duration of interest to a user; f) detecting apnea and bradycardia events, storing data indicative of said events, and simultaneously displaying to a user on a single visual display: 1) a first histogram showing the absolute number of apnea events for said selected duration for each of a predetermined number of time intervals over a predetermined period; 2) a numeric indication of the absolute number of apnea events for said selected duration during said predetermined period; and 3) a second histogram showing the absolute number of apnea events for each of a predetermined number of durations during said predetermined period.
Claim 11
Independent Claim
168 words
A method for displaying historical information related to apnea events in a human infant comprising the steps of: a) producing signals indicative of cardiac activity, and transthoracic impedance; b) transmitting said produced signals to a computer; c) receiving said signals into said computer; d) calculating smoothed instantaneous heart rate, smoothed instantaneous oxyhemoglobin saturation, average oxyhemoglobin saturation over a predetermined time interval, minimum and maximum oxyhemoglobin saturation over said predetermined time interval, respiratory effort, transthoracic impedance, and smoothed instantaneous respiration rate; e) detecting apnea and bradycardia events, storing data indicative of said events, and simultaneously displaying to a user on a single visual display: 1) a first histogram showing the absolute number of apnea events for each of a predetermined number of said time intervals over a predetermined period; 2) a numeric indication of the absolute number of apnea events during said predetermined period; and 3) a second histogram showing the maximum, minimum and average oxyhemoglobin saturation for each of a predetermined number of durations during said predetermined period.
Claim 12
Independent Claim
168 words
A method for displaying historical information related to apnea events in a human infant comprising the steps of: a) producing signals indicative of cardiac activity, and transthoracic impedance; b) transmitting said produced signals to a computer; c) receiving said signals into said computer; d) calculating smoothed instantaneous heart rate, smoothed instantaneous oxyhemoglobin saturation, average oxyhemoglobin saturation over a predetermined time interval, minimum and maximum oxyhemoglobin saturation over said predetermined time interval, respiratory effort, transthoracic impedance, and smoothed instantaneous respiration rate; e) detecting apnea and bradycardia events, storing data indicative of said events, and simultaneously displaying to a user on a single visual display: 1) a first histogram showing the absolute number of apnea events for each of a predetermined number of said time intervals over a predetermined period; 2) a numeric indication of the absolute number of apnea events during said predetermined period; and 3) a second histogram showing the maximum, minimum and average oxyhemoglobin saturation for each of a predetermined number of durations during said predetermined period.
Claim 13
Dependent Claim
25 words
The method of claim 8 wherein said first histogram further indicates visually the number of said apnea events which coincide in time with bradycardia events.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |