US3791374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programmer for segmented balloon pump
Assignee: DEPARTMENT OF HEALTH EDUCATION
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Filing: 1971-08-09
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Granted: 1974-02-12
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Expires: 1991-08-09
Abstract
Abstract A circuit for programming the inflation and deflation of a five segmented balloon pump as used in circulatory assist blood pump systems is disclosed. The rising and falling edges of wave pulses are used by a volume transducer to create a volume signal corresponding thereto. Means are provided to produce a plurality of signals corresponding to the rising edge of the waveform and a plurality of signals corresponding to the falling edge thereof. These signals are used to activate the various valves of the balloon pump and thereby inflate and deflate the segments.
Inventors
- 👤 H Guarino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:21
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/80; A61M60/841; A61M60/843; A61M60/10; A61M60/122; A61M60/126; A61M60/135; A61M60/139; A61M60/20; A61M60/295; A61M60/50; A61M60/508; A61M60/515; A61M60/855; A61M60/89; A61M60/892; A61M2205/00; A61M2205/33; A61M2205/3331; A61M2205/3334
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
221 words
A circuit for programming a mult-segment ballon blood pump having a valve for each balloon segment, comprising means for sensing the heart rhythm of a patient using the balloon pump, said sensing means including a volumetRic transducer for producing a volume signal, the waveforms of which are synchronized with his blood flow; a first signal channel means for transporting a plurality of first waveforms; a second signal channel means for simultaneously transporting a plurality of second waveforms; said second waveforms being the inverse of said first waveforms; a pair of comparators, said pair of comparators including a first comparator connected to said first signal channel means for producing a plurality of first trigger pulses phased with the rising edge of said first waveforms and a second comparator connected to said second signal channel means for producing a plurality of second trigger pulses phased with the falling edge of said second waveforms, there being a pair of comparators for each balloon segment; and means connected to said pair of comparators for utilizing the first and second trigger pulses to active and deactivate the valves of the balloon pump, said utilizing means including a plurality of monostable multivibrators and a plurality of pulse valve drivers connected to said multivibrators, there being a multivibrator and a pulse valve driver for each pair of comparators.
Claim 2
Dependent Claim
221 words
A circuit for programming a mult-segment ballon blood pump having a valve for each balloon segment, comprising means for sensing the heart rhythm of a patient using the balloon pump, said sensing means including a volumetRic transducer for producing a volume signal, the waveforms of which are synchronized with his blood flow; a first signal channel means for transporting a plurality of first waveforms; a second signal channel means for simultaneously transporting a plurality of second waveforms; said second waveforms being the inverse of said first waveforms; a pair of comparators, said pair of comparators including a first comparator connected to said first signal channel means for producing a plurality of first trigger pulses phased with the rising edge of said first waveforms and a second comparator connected to said second signal channel means for producing a plurality of second trigger pulses phased with the falling edge of said second waveforms, there being a pair of comparators for each balloon segment; and means connected to said pair of comparators for utilizing the first and second trigger pulses to active and deactivate the valves of the balloon pump, said utilizing means including a plurality of monostable multivibrators and a plurality of pulse valve drivers connected to said multivibrators, there being a multivibrator and a pulse valve driver for each pair of comparators.
Claim 3
Dependent Claim
152 words
The device of claim 1 wherein said first signal channel means includes: a first emitter follower; a second emitter follower connected to said first emitter follower and said first comparator; clamping means connected to said first emitter follower for grounding said volume signal; a complimentary emitter follower connected to said second emitter follower and said first comparator, wherein part of the output of said second emitter follower goes to said first comparator and part of said output goes to said complimentary emitter follower; means connected between said second emitter follower and said complimentary emitter follower for detecting and holding the peak of said part of said output of said second emitter follower which goes to said complimentary emitter follower; and a potentiometer connected between the output of said complimentary emitter follower and ground, the moving arm of said potentiometer being connected to said first comparator for variably phasing said first trigger pulses.
Claim 4
Dependent Claim
27 words
The device of claim 2 wherein there is a complimentary emitter follower, potentiometer and comparator in the first signal channel for each segment in the balloon pump.
Claim 5
Dependent Claim
152 words
The device of claim 1 wherein the second signal channel means includes: a signal inverter for inverting said volume signal; a first emitter follower connected to said signal inverter; clamping means connected to said first emitter follower for grounding said inverted volume signal; a complimentary emitter follower connected to said first emitter follower and said second comparator, wherein part of the output of said first emitter follower goes to said second comparator and part of said output goes to said complimentary emitter follower; means connected between said first emitter follower and said complimentary emitter follower for detecting and holding the peak of said part of said output of said second emitter follower which goes to said complimentary emitter follower; and a potentiometer connected between the output of said complimentary emitter follower and ground, the moving arm of said potentiometer being connected to said second comparator for variably phasing said second trigger pulses.
Claim 6
Dependent Claim
27 words
The device of claim 4 wherein there is a complimentary emitter follower, potentiometer and comparator in the second signal channel for each segment in the balloon pump.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |