US4967754A
Expired / Lapsed
US
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Method and apparatus for anticipating side effects manifested in a patient during dialysis treatment
Assignee: Gambro Hospal Schweiz AG
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Filing: 1989-06-12
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Granted: 1990-11-06
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Expires: 2009-06-12
Abstract
Abstract An apparatus and method for anticipating side effects which are manifested in a patient during a dialysis treatment, respectively comprising a device and step for measuring at least one haemodynamic value of the patient a predetermined number of times to obtain a parameter corresponding to the variation of the haemodynamic value with respect to time, a device and step for calculating a rating corresponding to a mean variation of the parameter with reference to a predetermined period, a device and step for comparing the value of the rating with a reference value delimiting a range of safety values, and a device and step for emitting an alarm signal each time the value of the rating falls outside the range of safety values delimited by the reference value.
Inventors
- 👤 Marco Rossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:11
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61B; A61B5/00; A61B5/02; A61M1/1601; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; A61M2205/00; A61M2205/18; A61M2205/50; A61M2205/52; A61M2230/00; A61M2230/04; A61M2230/06; A61M2230/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
111 words
A method for anticipating side effects capable of manifesting themselves in a patient during a dialysis treatment, comprising the steps of: measuring at least one haemodynamic value of the patient a predetermined number of times to establish a general trend with respect to time of said at least one haemodynamic value; calculating, using linear regression analysis, at least one rating corresponding to the slope of a line segment following said general trend; comparing said at least one rating with at least one reference value delimiting a range of predetermined safety values; and emitting an alarm signal each time said at least one rating falls outside of said range of safety values.
Claim 2
Independent Claim
111 words
A method for anticipating side effects capable of manifesting themselves in a patient during a dialysis treatment, comprising the steps of: measuring at least one haemodynamic value of the patient a predetermined number of times to establish a general trend with respect to time of said at least one haemodynamic value; calculating, using linear regression analysis, at least one rating corresponding to the slope of a line segment following said general trend; comparing said at least one rating with at least one reference value delimiting a range of predetermined safety values; and emitting an alarm signal each time said at least one rating falls outside of said range of safety values.
Claim 3
Dependent Claim
31 words
A method according to claim 1, wherein said at least one measured haemodynamic value is chosen from the group consisting of the following values: cardiac rate, electrocardiograph signal, and cardiac amplitude.
Claim 4
Dependent Claim
21 words
A method according to claim 1, further comprising the step of regulating dialysis treatment in response to an alarm signal emission.
Claim 5
Independent Claim
124 words
An apparatus for anticipating side effects which are manifested in a patient during a dialysis treatment, comprising: means for measuring at least one haemodynamic value of the patient a predetermined number of times to establish a general trend with respect to time of said at least one haemodynamic value; means for calculating, using linear regression analysis, at least one rating corresponding to the slope of a line segment following said general trend; means for comparing the value of said at least one rating with at least one reference value delimiting a range of safety values; and means for emitting an alarm signal each time the value of said rating falls outside the range of safety values delimited by said at least one reference value.
Claim 6
Independent Claim
124 words
An apparatus for anticipating side effects which are manifested in a patient during a dialysis treatment, comprising: means for measuring at least one haemodynamic value of the patient a predetermined number of times to establish a general trend with respect to time of said at least one haemodynamic value; means for calculating, using linear regression analysis, at least one rating corresponding to the slope of a line segment following said general trend; means for comparing the value of said at least one rating with at least one reference value delimiting a range of safety values; and means for emitting an alarm signal each time the value of said rating falls outside the range of safety values delimited by said at least one reference value.
Claim 7
Dependent Claim
29 words
An apparatus according to claim 4, wherein the measurement means measures a haemodynamic value chosen from the group consisting of the following: cardiac rate, electrocardiograph signals, and cardiac amplitude.
Claim 8
Dependent Claim
19 words
An apparatus according to claim 4, wherein said calculating means includes a filter disposed down-line from said measurement means.
Claim 9
Dependent Claim
35 words
An apparatus as set forth in claim 4, wherein said calculating means includes memory means for storing said predetermined number of haemodynamic values supplied by said measurement means, and rating means for calculating said rating.
Claim 10
Dependent Claim
16 words
An apparatus as set forth in claim 4, wherein said calculating means further comprises a microprocessor.
Claim 11
Dependent Claim
18 words
An apparatus as set forth in claim 4, wherein said comparison means comprises at least one threshold comparator.
Claim 12
Dependent Claim
28 words
An apparatus as set forth in claim 9, wherein said comparison means further comprises at least one element for regulating a threshold reference value of the threshold comparator.
Claim 13
Dependent Claim
15 words
An apparatus as set forth in claim 4, wherein said means emits an acoustic signal.
Claim 14
Dependent Claim
15 words
An apparatus as set forth in claim 4, wherein said means emits an optical signal.
Claim 15
Dependent Claim
25 words
An apparatus as set forth in claim 4, further comprising means for controlling a dialysis machine in response to said emission of said alarm signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |