Patent US4537197A successfully refreshed from Google Patents.
US4537197A
Expired / Lapsed
US
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Disposable fetal oxygen monitor
Assignee: Individual
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Filing: 1981-03-06
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Granted: 1985-08-27
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Expires: 2001-03-06
Abstract
Abstract Oxygenation within the brain of a child being born is monitored by light, initially transmitted by a bundle of fiber optics in one channel of a catheter held to the baby's scalp by mild suction, the condition of the brain being monitored via reflected light from the brain transmitted through a light fiber optic bundle in a second channel of the catheter.
Inventors
- 👤 Jaroslav F. Hulka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:10
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/1455; A61B5/1464; A61B5/14542; A61B5/43; A61B5/4306; A61B5/4343; A61B5/4362; A61B5/68; A61B5/6801; A61B5/683; A61B5/6834
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
Surgical equipment comprising an obstetrical scalp cap of soft flexible plastic to be attached to a fetal scalp incidental to monitoring oxygenation of the fetal brain tissue, said cap having on its inner surface one or more recesses communicating with a port in the cap by which vacuum may be delivered thereto to hold the scalp cap in place at the time of expected delivery, said scalp cap including a pair of apertures at the inner surface, and a comolded catheter on the outside of the cap, said catheter having a channel for communicating vacuum to said port and having a pair of channels respectively accommodating fiber optic bundles by which a beam of light may be transmitted to the fetal brain through one of said pairs of apertures and reflected back through the other.
Claim 2
Dependent Claim
135 words
Surgical equipment comprising an obstetrical scalp cap of soft flexible plastic to be attached to a fetal scalp incidental to monitoring oxygenation of the fetal brain tissue, said cap having on its inner surface one or more recesses communicating with a port in the cap by which vacuum may be delivered thereto to hold the scalp cap in place at the time of expected delivery, said scalp cap including a pair of apertures at the inner surface, and a comolded catheter on the outside of the cap, said catheter having a channel for communicating vacuum to said port and having a pair of channels respectively accommodating fiber optic bundles by which a beam of light may be transmitted to the fetal brain through one of said pairs of apertures and reflected back through the other.
Claim 3
Dependent Claim
28 words
Surgical equipment according to claim 1 in which the vacuum channel in the end of the catheter opposite the scalp cap has vacuum communicated thereto by a syringe.
Claim 4
Dependent Claim
44 words
Surgical equipment according to claim 1 or 2 in which the ends of the fiber optic bundles opposite the apertures related thereto are respectively connected to a light beam transmitter and an instrument for analyzing the reflected light in terms of the oxygenation equivalent.
References Cited (Backward Citations)
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Cited
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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) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |