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Benjamin Bar-oz - One of the best experts on this subject based on the ideXlab platform.

  • Clinical outcome of Umbilical Artery Catheter-related thrombosis—a cohort study
    Journal of Perinatology, 2012
    Co-Authors: Zivanit Ergaz, Natalia Simanovsky, Katya Rozovsky, Noa Ofek-shlomai, Shoshana Revel-vilk, S Abu Leil, Benjamin Bar-oz
    Abstract:

    Objective: To reveal the incidence of Umbilical Artery Catheter-related thrombosis (UACRT), the associated risk factors and the natural history of clot formation and regression. Study Design: A prospective cohort study. An Umbilical Artery Catheter was inserted in 61 infants, who were evaluated and followed by serial duplex ultrasound studies for the development of UACRT, renal Artery resistance index (RI) and clot resolution. Maternal and infant clinical variables were correlated with the characteristics of thrombi. Result: Nineteen infants developed UACRT, all resolved spontaneously without sequella; most had maximal length at the first evaluation. No correlation was found between the thrombus length and time to resolution. The RI did not differ between the infants with and without UACRT. After adjusting for possible confounding, Catheter days was the only covariate associated with UACRT. Conclusion: Asymptomatic UACRT in our cohort was a self-resolving disease; it was associated with Catheter days and did not necessitate medical treatment.

  • Clinical outcome of Umbilical Artery Catheter-related thrombosis - a cohort study.
    Journal of perinatology : official journal of the California Perinatal Association, 2012
    Co-Authors: Zivanit Ergaz, Natalia Simanovsky, Katya Rozovsky, S Abu Leil, Noa Ofek-shlomai, Shoshana Revel-vilk, Benjamin Bar-oz
    Abstract:

    To reveal the incidence of Umbilical Artery Catheter-related thrombosis (UACRT), the associated risk factors and the natural history of clot formation and regression. A prospective cohort study. An Umbilical Artery Catheter was inserted in 61 infants, who were evaluated and followed by serial duplex ultrasound studies for the development of UACRT, renal Artery resistance index (RI) and clot resolution. Maternal and infant clinical variables were correlated with the characteristics of thrombi. Nineteen infants developed UACRT, all resolved spontaneously without sequella; most had maximal length at the first evaluation. No correlation was found between the thrombus length and time to resolution. The RI did not differ between the infants with and without UACRT. After adjusting for possible confounding, Catheter days was the only covariate associated with UACRT. Asymptomatic UACRT in our cohort was a self-resolving disease; it was associated with Catheter days and did not necessitate medical treatment.

Zivanit Ergaz - One of the best experts on this subject based on the ideXlab platform.

  • Clinical outcome of Umbilical Artery Catheter-related thrombosis—a cohort study
    Journal of Perinatology, 2012
    Co-Authors: Zivanit Ergaz, Natalia Simanovsky, Katya Rozovsky, Noa Ofek-shlomai, Shoshana Revel-vilk, S Abu Leil, Benjamin Bar-oz
    Abstract:

    Objective: To reveal the incidence of Umbilical Artery Catheter-related thrombosis (UACRT), the associated risk factors and the natural history of clot formation and regression. Study Design: A prospective cohort study. An Umbilical Artery Catheter was inserted in 61 infants, who were evaluated and followed by serial duplex ultrasound studies for the development of UACRT, renal Artery resistance index (RI) and clot resolution. Maternal and infant clinical variables were correlated with the characteristics of thrombi. Result: Nineteen infants developed UACRT, all resolved spontaneously without sequella; most had maximal length at the first evaluation. No correlation was found between the thrombus length and time to resolution. The RI did not differ between the infants with and without UACRT. After adjusting for possible confounding, Catheter days was the only covariate associated with UACRT. Conclusion: Asymptomatic UACRT in our cohort was a self-resolving disease; it was associated with Catheter days and did not necessitate medical treatment.

  • Clinical outcome of Umbilical Artery Catheter-related thrombosis - a cohort study.
    Journal of perinatology : official journal of the California Perinatal Association, 2012
    Co-Authors: Zivanit Ergaz, Natalia Simanovsky, Katya Rozovsky, S Abu Leil, Noa Ofek-shlomai, Shoshana Revel-vilk, Benjamin Bar-oz
    Abstract:

    To reveal the incidence of Umbilical Artery Catheter-related thrombosis (UACRT), the associated risk factors and the natural history of clot formation and regression. A prospective cohort study. An Umbilical Artery Catheter was inserted in 61 infants, who were evaluated and followed by serial duplex ultrasound studies for the development of UACRT, renal Artery resistance index (RI) and clot resolution. Maternal and infant clinical variables were correlated with the characteristics of thrombi. Nineteen infants developed UACRT, all resolved spontaneously without sequella; most had maximal length at the first evaluation. No correlation was found between the thrombus length and time to resolution. The RI did not differ between the infants with and without UACRT. After adjusting for possible confounding, Catheter days was the only covariate associated with UACRT. Asymptomatic UACRT in our cohort was a self-resolving disease; it was associated with Catheter days and did not necessitate medical treatment.

Billie L. Short - One of the best experts on this subject based on the ideXlab platform.

  • Continuous Blood Gas Monitoring Using an In-Dwelling Optode Method: Clinical Evaluation of the Neotrend Sensor Using a Luer Stub Adaptor to Access the Umbilical Artery Catheter
    Journal of Perinatology, 2002
    Co-Authors: Khodayar Rais-bahrami, Oswaldo Rivera, Gerald T. Mikesell, Billie L. Short
    Abstract:

    INTRODUCTION: Arterial blood gases are essential in the management of critically ill neonates. A new technology using the Neotrend system (Diametrics Medical) allows for continuous measurement of pH, PaCO_2, and PaO_2, and calculates oxygen saturation, bicarbonate, and base excess. OBJECTIVE: To evaluate and compare the results of continuous blood gas measurement using the Neotrend system with a standard system of blood gas analysis in our intensive care unit. DESIGN: Prospective, controlled, interventional study. SETTING: The neonatal intensive care unit of a tertiary referral center. PATIENTS: Neonates with respiratory distress who required respiratory support and frequent arterial blood gas sampling and had a UAC. RESEARCH DESIGN AND METHOD: To enable Neotrend sensor access to an existing Argyle Umbilical Artery Catheter (UAC) the Catheter was cut at the 25-cm mark and connected to an 18-gauge blunt needle luer stub adaptor (Vygon 95440). The study began with the insertion of the Neotrend sensor. Subjects remained on the study until the UAC was discontinued and/or frequent blood gases were no longer needed. The blood gas results from the Neotrend system were not used in clinical management of the patient. BLOOD GAS MEASUREMENT: During the study period, with each blood sample drawn for laboratory analysis, a printout from the Neotrend monitor was recorded for comparison. RESULTS: A total of 217 pairs of blood gas samples were collected from seven neonates. The mean bias/precision for pH was 0.01/0.04; for PaO_2 0.72/18.5 mm Hg; and for PaCO_2 3.96/2.63 mm Hg. The correlation ( r value) between the sensor reading and the blood gases were 0.85 for pH, 0.96 for PaO_2, and 0.92 for PaCO_2. CONCLUSION: The blood gases compared in the two methods had a strong correlation for pH, PaCO_2, PaO_2, and oxygen saturation. Although the bicarbonate and base excess values showed suboptimal statistical correlation, the difference was not clinically relevant. Results of this study indicate that this technology provides an accurate means of monitoring continuous blood gas parameters in neonatal patients. It also allows reduced healthcare provider exposure to blood and decreased patient iatrogenic blood loss.

  • Continuous blood gas monitoring using an in-dwelling optode method: clinical evaluation of the Neotrend sensor using a luer stub adaptor to access the Umbilical Artery Catheter.
    Journal of perinatology : official journal of the California Perinatal Association, 2002
    Co-Authors: Khodayar Rais-bahrami, Oswaldo Rivera, Gerald T. Mikesell, Billie L. Short
    Abstract:

    Continuous Blood Gas Monitoring Using an In-Dwelling Optode Method: Clinical Evaluation of the Neotrend Sensor Using a Luer Stub Adaptor to Access the Umbilical Artery Catheter

R Hitchcock - One of the best experts on this subject based on the ideXlab platform.

Claudia Roll - One of the best experts on this subject based on the ideXlab platform.

  • Umbilical Artery Catheter blood sampling volume and velocity: Impact on cerebral blood volume and oxygenation in very-low-birthweight infants
    Acta Paediatrica, 2006
    Co-Authors: Claudia Roll, B Hüning, Jens Krug, Matthias Kaunicke, Sandra Horsch
    Abstract:

    Aim: Blood sampling from Umbilical Artery Catheters decreases cerebral blood volume and cerebral oxygenation. The aim of this study was to assess the impact of sampling volume and velocity. Methods: Forty-eight infants, median birthweight 965 g (480–1500 g), median gestational age 27 wk (23–34 wk), were studied during routine blood sampling from Umbilical Artery Catheters. The sampling procedure was performed following a strict protocol for draw-up volume (1.6 ml), sampling volume (1.7 ml or 0.2 ml), re-injection volume (1.6 ml) and flushing volume (0.6 ml), time of aspiration (40 s or 80 s), re-injection (30 s) and flushing (6 s). In each infant, sampling volume and aspiration time were subject to sequential variation in a randomized fashion (1.7 ml/40 s, 1.7 ml/80 s, 0.2 ml/30 s). Using near-infrared spectroscopy, changes in concentrations of cerebral oxygenated and deoxygenated haemoglobin were measured, and changes in cerebral blood volume and cerebral oxygenation were calculated. Results: During all three sampling procedures, oxygenated haemoglobin decreased significantly from baseline, whereas deoxygenated haemoglobin did not change. Correspondingly, a decrease in cerebral blood volume and cerebral oxygenation occurred. This decrease was not affected significantly by extending the sampling time from 40 s to 80 s, whereas it was blunted by reducing the amount of blood withdrawn. Conclusion: Blood sampling from Umbilical Artery Catheters induces a decrease in cerebral blood volume and cerebral oxygenation. The magnitude of the decrease depends on the blood volume withdrawn but not on sampling velocity.

  • Umbilical Artery Catheter blood sampling decreases cerebral blood volume and oxygenation in very low birthweight infants.
    Acta paediatrica (Oslo Norway : 1992), 2000
    Co-Authors: Claudia Roll, B Hüning, Jens Krug, Matthias Kaunicke, Sandra Horsch
    Abstract:

    UNLABELLED The aim of this study was to assess whether blood sampling from Umbilical Artery Catheters reduces cerebral blood volume and cerebral oxygenation in very low birthweight infants. A total of 20 infants, median birthweight 890 g (530-1,500 g), median gestation age 26 +4 wk (range: 22 +5 to 30 +6 wk) were studied from 10 min before until 10 min after routine blood sampling from Umbilical Artery Catheters placed in the high position. Using near infrared spectroscopy, changes in concentrations of cerebral oxygenated and deoxygenated haemoglobin were measured, and changes in cerebral blood volume and cerebral oxygenation index were calculated. Heart rate, oxygen saturation, transcutaneous PO2 and PCO2 were registered continuously. Mean arterial blood pressure was measured before and after sampling. Oxygenated haemoglobin decreased significantly from baseline during blood sampling, whereas deoxygenated haemoglobin did not change significantly. This resulted in a decrease in cerebral blood volume and cerebral oxygenation index. Heart rate increased slightly, but significantly, from baseline. Oxygen saturation, blood pressure, transcutaneous PO2 and PCO2 did not change significantly. CONCLUSION Blood sampling from Umbilical Artery Catheters induces a significant decrease in cerebral blood volume and cerebral oxygenation.

  • Umbilical Artery Catheter (UAC) BLOOD SAMPLING DECREASES CONCENTRATIONS OF CEREBRAL TOTAL (tHb) AND OXYGENATED HEMOGLOBIN (O 2 Hb) IN VERY LOW BIRTH WEIGHT INFANTS
    Pediatric Research, 1999
    Co-Authors: Claudia Roll, B Hüning, Jens Krug, Matthias Kaunicke, L. Hanssler
    Abstract:

    Umbilical Artery Catheter (UAC) BLOOD SAMPLING DECREASES CONCENTRATIONS OF CEREBRAL TOTAL (tHb) AND OXYGENATED HEMOGLOBIN (O 2 Hb) IN VERY LOW BIRTH WEIGHT INFANTS