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Assessment of fetal reactivity by fetal heart rate analysis

A fetal heart rate, fetal technology, applied in the measurement of pulse rate/heart rate, application, medical science, etc., can solve problems such as wrong diagnosis and neglect

Inactive Publication Date: 2007-04-04
诺文塔因特利姆股份公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] As a result, changes in FHR during labor are still managed visually by skilled medical practitioners, which may occasionally lead to ignoring or misdiagnosing signs of fetal distress as discussed previously.

Method used

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  • Assessment of fetal reactivity by fetal heart rate analysis
  • Assessment of fetal reactivity by fetal heart rate analysis
  • Assessment of fetal reactivity by fetal heart rate analysis

Examples

Experimental program
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Embodiment Construction

[0078] FHR is monitored for signs of fetal discomfort (hypoxia) during labor. Figure 1 shows STAN at 35 minutes in the first stage of labor  Record. This case shows a lack of FHR variability and reactivity (pre-terminal FHR pattern) that was not identified at the moment of recording despite the presence of ST events. The figure also depicts low measurements of "residual" markers of FHR reactivity and variability (frequency distribution of residual measurements in the 3-4 ms range (FD 3-4ms ) < 1% and remaining measurements of the 95th percentile < 3 ms).

[0079] FHR 10 is displayed with uterine activity. Here, although FHR 10 rises together with an increase in uterine activity (ie, contractions), FHR changes less than would normally be expected at this stage. While most experienced obstetricians would perceive the FHR 10 to be abnormal, such readings do not necessarily trigger other alarms (eg, ST events). So there are cases where such abnormal readings are missed.

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Abstract

The present invention relates to the field of fetal heart rate (FHR) monitoring. In particular, it relates to monitoring during periods of so-called non-stationary fetal heart rate patterns, such as those that occur during labour. The invention provides an improved apparatus, method and computer program for more clear analysis of FHR variations, such that fetal distress can be correctly assessed earlier. According to one aspect, the invention comprises means for determining a fetal heart rate, means for identifying a primary fetal heart rate component, means for subtracting the primary component from the determined fetal heart rate to determine a residual component, and means for using said residual component for analysis of the fetal heart rate beat-to-beat variation.

Description

technical field [0001] The present invention relates to the field of fetal heart rate (FHR) monitoring. The invention particularly relates to the monitoring of fetal heart rate patterns during so-called "unstationary fetal heart rate patterns", for example during childbirth. Background technique [0002] Fetal heart rate is an important indicator of fetal health during pregnancy and delivery. Some change in heart rate is desirable as this indicates that the fetus is responding to stimuli. However, certain changes can also indicate that the fetus is experiencing discomfort and may be suffering from early hypoxia (hypoxia). [0003] It is common practice to measure FHR during labor. Currently, it is common to display FHR as a time curve on a monitor. A medical professional then visually studies the curve to check for signs of fetal distress. Thus, the system relies on the skill and experience of the user. [0004] The fetus alternates between sleeping and active states d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/024A61B5/0444A61B5/344
CPCA61B5/02411
Inventor 尼古拉斯·乌特勒姆卡尔·古斯塔夫·罗森
Owner 诺文塔因特利姆股份公司
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