US5009507A
Expired / Lapsed
US
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Method of evaluating meconium content of amniotic fluid
Assignee: Individual
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Filing: 1990-03-21
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Granted: 1991-04-23
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Expires: 2010-03-21
Abstract
Abstract A method of evaluating the maconium content or concentration of amniotic fluid makes uses of a meconium measurement color chart which accurately reproduces the color and transparency of amniotic fluid having different amounts of meconium therein. Measurement indicia are denoted on the chart next to corresponding color samples. A sample of amniotic fluid is placed either on a transparent medium or in a transparent container. Then the sample is visually compared with the meconium measurement chart, while shining fluorescent light through both the sample and the meconium measurement chart, so as to determine the denoted measurement value which most closely matches the color and transparency of the amniotic fluid sample. If the measurement value is above a predefined threshold value, precautionary measures are taken to improve the infant's chances of survival, e.g., by intubating the infant's lungs.
Inventors
- 👤 Michael Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:27
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/29; G01N21/293
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
A method of evaluating meconium content of an amniotic fluid sample, the steps of the method comprising: placing a sample of amniotic fluid in a transparent medium; providing a color chart depicting fluid colors which correspond to various levels of meconium content in amniotic fluid, said color chart including at least one meconium concentration indicia corresponding to a predefined color in said color chart; and comparing said amniotic fluid sample with said color chart and determining the meconium concentration level of said amniotic fluid sample relative to said meconium concentration indicia.
Claim 2
Independent Claim
91 words
A method of evaluating meconium content of an amniotic fluid sample, the steps of the method comprising: placing a sample of amniotic fluid in a transparent medium; providing a color chart depicting fluid colors which correspond to various levels of meconium content in amniotic fluid, said color chart including at least one meconium concentration indicia corresponding to a predefined color in said color chart; and comparing said amniotic fluid sample with said color chart and determining the meconium concentration level of said amniotic fluid sample relative to said meconium concentration indicia.
Claim 3
Dependent Claim
58 words
The method of evaluating meconium content of an amniotic fluid sample as set forth in claim 1, further including the step of shining white fluorescent light through said amniotic fluid sample and said color chart; said comparing step including the step of visually comparing the color of said amniotic fluid sample with the colors in said color chart.
Claim 4
Independent Claim
90 words
A method of evaluating meconium content of an amniotic fluid sample, the steps of the method comprising: obtaining a sample of amniotic fluid; providing a color chart depicting a multiplicity of distinct colors which correspond to various levels of meconium content in amniotic fluid, said color chart including at least one meconium concentration indicia corresponding to a predefined color in said color chart; and comparing said amniotic fluid sample with said color chart and determining the meconium concentration level of said amniotic fluid sample relative to said meconium concentration indicia.
Claim 5
Independent Claim
90 words
A method of evaluating meconium content of an amniotic fluid sample, the steps of the method comprising: obtaining a sample of amniotic fluid; providing a color chart depicting a multiplicity of distinct colors which correspond to various levels of meconium content in amniotic fluid, said color chart including at least one meconium concentration indicia corresponding to a predefined color in said color chart; and comparing said amniotic fluid sample with said color chart and determining the meconium concentration level of said amniotic fluid sample relative to said meconium concentration indicia.
Claim 6
Dependent Claim
109 words
The method of evaluating meconium content of an amniotic fluid sample as set forth in claim 3, said providing step including the step of providing a color chart having a multiplicity of distinct color samples which correspond to various levels of meconium content in amniotic fluid, said color chart including meconium concentration indicia corresponding to each of said color samples; said comparing step including the step of visually comparing the color of said amniotic fluid sample with the colors samples in said color chart and selecting the meconium concentration indicia for a color sample in said color chart which most closely matches the color of said amniotic fluid sample.
Claim 7
Dependent Claim
77 words
The method of evaluating meconium content of an amniotic fluid sample as set forth in claim 3, said providing step including the step of providing a color chart depicting a continuous color spectrum having colors which vary from a pale yellow color at one end of said spectrum to a green-brown color at another end of said spectrum, said color chart having at least one meconium content indicia neighboring a corresponding predefined color in said color spectrum.
Claim 8
Dependent Claim
57 words
The method of evaluating meconium content of an amniotic fluid sample as set forth in claim 3, further including the step of shining fluorescent light through said amniotic fluid sample and said color chart; said comparing step including the step of visually comparing the color of said amniotic fluid sample with the colors in said color chart.
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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) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |