challenge

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challenge

1. US an assertion that a person is not entitled to vote or that a vote is invalid
2. Law a formal objection to a person selected to serve on a jury (challenge to the polls) or to the whole body of jurors (challenge to the array)

challenge

[′chal·ənj]
(communications)
To cause an interrogator to transmit a signal which puts a transponder into operation.
(immunology)
Administration of an antigen to ascertain state of immunity.
References in periodicals archive ?
The gold standard for testing fluid responsiveness is a fluid challenge, in which a volume of fluid sufficient to increase the preload is infused over a short period of time and the response of the ventricle is tested.
Therefore, since activation of renal elimination requires about 20 min, and distribution of crystalloid throughout the extracellular fluid space requires about 30 min for completion [14], we have excluded the first mini fluid challenge related data from the present analysis.
Intravenous fluid loading is often used as first-line therapy for patients with hypotension or circulatory failure, but in only half of patients does cardiac output respond positively after fluid challenge.
Renal perfusion assessment by renal Doppler during fluid challenge in sepsis.
Fluid challenge induced plasma dilution (PD) during the mVLT is calculated from a change of hemoglobin concentration (Hb).
A variable was regarded as a predictor of fluid responsiveness if its baseline value correlated with the change in stroke volume associated with fluid challenge (1).
Marmaite, "Goal directed fluid therapy revised: indirect monitoring of interstitial fluid accumulation during mini fluid challenges with crystalloids", Open Conf Proc J.
As fluid challenge can result in clinical deterioration, the ability to predict haemodynamic response is desirable In this way it might be possible to avoid unnecessary volume replacement in critically ill patients
Fluid challenge is a common diagnostic method to help the physician determine fluid responsiveness, which is an important component of fluid management in critically ill patients.
Imminent oedema is suspected when the ability of a mini fluid challenge to advance haemodilution is minimised (approaches zero) [6].
Following twice fluid challenge tests, the systolic blood pressure, mean blood pressure, cardiac output and SV in the GDFT group were significantly higher, and the heart rate was lower than in the control group.
OAK SIGNATURE addresses the rigorous fluid challenges of metalcutting, metalforming, cleaning, corrosion inhibition, and specialty applications.