Clinical trial NCT01976013: Prediction of Major Bleeding in ELBW-infants (<1000g) by Sequential Coagulation Monitoring
Official title: Prediction of Major Bleeding in Extremely Low Birth Weight Infants (<1000g) by Sequential Coagulation Monitoring
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Intraventricular Haemorrhage
Pulmonary Haemorrhage
Keywords: PT
INR
intraventricular haemorrhage
pulmonary haemorrhage
ELBW infants
Lead sponsor: Medical University of Vienna
Sponsor class: OTHER
First posted: 2013-11-05
Enrollment: 126
Sex: ALL
Minimum age (years): 2
Maximum age (years): 7
Standard ages: CHILD
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: DIAGNOSTIC

Brief summary: Up to now, only data about early and single coagulation screening exist in extreme low birth weight infants (ELBW) infants. In neonatal practice, coagulation abnormality in preterm babies is primarily investigated by measuring prothrombin time (PT). In fact, FVII activity, which is an important determinant of PT, is strongly associated with bleeding risk. Thus, a method to measure PT with small volume samples (10μL) provides the possibility for serial monitoring even in ELBW infants (CoaguChek®XS, Roche Diagnostics, Vienna, Austria)). Substitution of fesh frozen plasma seemed beneficial in ELBW infants and first trials with rFVII revealed promising results in this patient population. Thus, coagulation monitoring might lead to early and adequate therapy and therefore to a better outcome. The investigators hypothesize that ELBW infants (\<1000g birth weight) with primary severe prolongation of prothrombin time or development of severe prothrombin prolongation during sequential monitoring may have more frequent and more severe bleeding incidents (Intraventricular haemorrhage and pulmonary haemorrhage). The investigators aim to explore whether monitoring of PT can predict bleeding events in ELBW children.

Detailed description: It was recently reported that "early", i.e. in the first 48h of life, coagulation screening may identify infants at risk of severe IVH. Unfortunately, in the past screening for coagulation abnormalities and correction of haemostatic defects by prothrombin complex concentrate, cryoprecipitate or platelet concentrates) and fresh frozen plasma (FFP) had limited effects in preterm infants. This could have been due to the short duration of action, incomplete restoration of coagulation or the water and osmotic load associated with FFP administration. However recently, using a coagulopathy screening strategy (one blood sample within the first 2h after birth) and substitution with FFP decreased the risk of developing IVH in infants born at 23 to 26 weeks of gestation. Recombinant Factor VII (rFVII) provides a new therapeutic option to overcome FFP associated side effects. Small trials, including infants with pulmonary hemorrhage, showed the safety and effectiveness of rFVII in VLBW infants; however no randomised controlled trials have been published so far. As outlined above, bleeding complications are still a major problem in extremely low birth weight (ELBW) infants and coagulation abnormalities are associated with bleeding. Up to now, only data about early and single screening exist and coagulation monitoring with multiple blood sampling was not applied.

In neonatal practice, coagulation abnormality in preterm babies is primarily investigated by measuring prothrombin time (PT). In fact, FVII activity, which is an important determinant of PT, is strongly associated with bleeding risk. Thus, a method to measure PT with small volume samples (10μL) provides the possibility for serial monitoring even in ELBW infants.

Substitution of FFP seemed beneficial in ELBW infants and first trials with rFVII revealed promising results in this patient population. Thus, coagulation monitoring might lead to early and adequate therapy and therefore to better outcome.

Eligibility criteria: Inclusion Criteria:

* Preterm infants with a birth weight \<1000g
* signed informed consent

Exclusion Criteria:

* Congenital heart disease
* major congenital birth defects

Primary outcomes:
measure: major bleeding
timeFrame: 30 days
Secondary outcomes:
measure: mortality
timeFrame: 30 days
Other outcomes:
Locations:
city: Vienna
country: Austria
facility: Medical University of Vienna
Study officials:
affiliation: Medical University Vienna
name: Nadja Haiden, MD
role: PRINCIPAL_INVESTIGATOR
References: