deceleration


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Related to deceleration: deceleration injury, early deceleration

deceleration

 [de-sel″ĕ-ra´shun]
the sudden stopping of movement, a frequent mechanism of motion injury. Common causes of deceleration injury are motor vehicle accidents and falls.
early deceleration in fetal heart rate monitoring, a transient decrease in heart rate that coincides with the onset of a uterine contraction.
late deceleration in fetal heart rate monitoring, a transient decrease in heart rate occurring at or after the peak of a uterine contraction and resulting from fetal hypoxia.
variable d's in fetal heart rate monitoring, a transient series of decelerations in heart rate that vary in duration, intensity, and relation to uterine contractions; they are abrupt in onset and cessation and result from vagus nerve firing in response to stimuli such as umbilical cord compression in the first stage of labor.

de·cel·er·a·tion

(dē-sel'ĕr-ā'shŭn),
1. The act of decelerating.
2. The rate of decrease in velocity per unit of time.

deceleration

/de·cel·er·a·tion/ (de-sel″er-a´shun) decrease in rate or speed.
early deceleration  in fetal heart rate monitoring, a transient decrease in heart rate that coincides with the onset of a uterine contraction.
late deceleration  in fetal heart rate monitoring, a transient decrease in heart rate occurring at or after the peak of a uterine contraction, which may indicate fetal hypoxia.
variable decelerations  in fetal heart rate monitoring, a transient series of decelerations that vary in intensity, duration, and relation to uterine contraction, resulting from vagus nerve firing in response to a stimulus such as umbilical cord compression in the first stage of labor.

deceleration

[dēsel′ərā′shən]
Etymology: L, de + accelerare, to hasten
a decrease in the speed or velocity of an object or reaction. Compare acceleration.
A term referring to the slowing of the foetal heart in response to a reduction in maternal circulation

deceleration

Dip Obstetrics A periodic & transient slowing of the fetal heart rate in response to uterine contractions, ie stress. See Fetal heart monitor, Uniform deceleration, Variable deceleration.
Deceleration
Uniform deceleration The fetal heart response to uterine contractions; UCs are symmetrical, have a uniform temporal relation thereto and are divided into:
Early deceleration/Type I dip Due to vagal stimulation elicited in the first stage of labor by fetal head compression
Late deceleration/Type II dip Due to uteroplacental insufficiency, potentially associated with a less favorable outcome; may signal early vasomotor lability
Variable deceleration The fetal heart response is asynchronous with respect to uterine contractions; the curves on the fetal heart monitor are more angled and saw-toothed, and may be related to compromise in placental blood flow, eg umbilical cord compression and, like late decelerations, may signify parturition-related difficulties

de·cel·er·a·tion

(dē-sel'ĕr-ā'shŭn)
1. A slowing of contractions during the first stage of labor.
2. A slowing of the fetal heart rate during uterine contractions.
[de- + acceleration]

Deceleration

A decrease in the fetal heart rate that can indicate inadequate blood flow through the placenta.
Mentioned in: Antepartum Testing

deceleration

a change in motion of an object or body usually understood as the rate of reduction in speed (although it can also refer to a change in direction). A negative acceleration.

deceleration,

n in osteopathy, the process of decreasing speed or velocity of a manipulative technique.

de·cel·er·a·tion

(dē-sel'ĕr-ā'shŭn)
A slowing of contractions during the first stage of labor.
[de- + asceleration]

deceleration

(dēsel´ərā´shən),
n a decrease in the speed or velocity of an object or reaction.
References in periodicals archive ?
Pathophysiologically, it seems logical that the total area is most predictive, as it captures both the temporal and dose effect of decelerations.
After back-transforming the regression model, the best-fit line, lower prediction interval and upper prediction interval were reasonably well modeled using Equation 1 and deceleration rates of 0.
However, there are shades of the deceleration principle in Olympia Mortg.
Retrospective stepwise logistic regression analysis was performed to determine the most efficient risk factors which caused to growth deceleration in Group C compared to Group A.
Antepartum nonstress fetal heart rate monitoring: systematic analysis of baseline patterns and decelerations as an adjunct to reactivity in the prediction of fetal risks.
The ability to control both the speed and the deceleration mean that you can very quickly get a range of results for different conditions.
Still, global deceleration will affect Russia through a decrease in exports and deceleration in credit growth.
The standard covers areas such as deceleration limits and driver survival space.
Sinus node deceleration (SND) has been described as an initial increase and subsequent decrease in heart rate with exercise while having higher work load.