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Biomedical subjects

D Ronayette

Publications and source records attributed to D Ronayette.

18 recordsLinked to original sources
PubMed1996

[Treatment of neonatal thrombocytopenia].

Treatment of neonatal thrombocytopenia is dependent on its etiology and severity. The best indication for treatment with immunoglobulins is autoimmune thrombocytopenia. Platelet and blood transfusions are justified mainly in the presence of severe infection. The only indication for platelet transfusion is severe thrombocytopenia (platelet count below 30 G/L).

Humans↗
PubMed1996

[Cardiac tamponade after central venous catheterization in a newborn infant].

BACKGROUND: Cardiac tamponade due to an intrapericardial infusion is a serious complication of central venous catheterization. CASE REPORT: An infant born at 35 weeks of gestation age, weighing 2300 g, was operated on at H10 for a duodenal stenosis. On day 2, a polyurethane central venous catheter was inserted for parenteral nutrition via his right internal jugular vein. A frank blood return was obtained and a chest X-ray taken 2 hours later showed that the tip into the catheter was in the right ventricle. Four hours after insertion, a sudden deterioration of the infant's status led to tracheal intubation and artificial ventilation on 100% oxygen; no improvement was noted. The heart rate was 135 bpm, but the differential blood pressure was decreased at 68/56 mmHg and there was no blood return on the catheter. Cardiac tamponade was then suspected and immediately confirmed by pericardial tap that yielded 10.5 mL of the infused solution. The catheter tip was then repositioned and a good blood return was obtained. The infant's breathing and hemodynamic status improved dramatically. CONCLUSION: The use of very thin and flexible central venous catheters does not eliminate the risk of perforation of the cardiac chambers. A cardiac tamponade must always be considered in children with a central venous catheter when a sudden deterioration of hemodynamic status is noted.

Cardiac Tamponade↗
PubMed1992

[Role of echoencephalography in myelomeningocele].

Infants with myelomeningocele very often present cranio-cerebral anomalies such as Arnold Chiari malformation. Cranial ultrasonography allows early evaluation of these malformations and helps to detect complications in surgically treated children.

Arnold-Chiari Malformation↗
PubMed1991

[Echoencephalography in myelomeningocele].

Infants with myelomeningocele very often present cranio-cerebral anomalies such as Arnold Chiari malformation. Cranial ultrasonography allows early evaluation of these malformations and helps to detect complications in surgically treated children.

Arnold-Chiari Malformation↗
PubMed1989

[Neonatal pneumococcal septicemia].

We report two cases of neonatal pneumococcal septicemia, including one fatal case in a 32-week-gestational-age premature infant. Neonatal pneumococcal septicemias account for less than 1% of all neonatal infections. Diagnosis is provided by simple and rapid methods for identifying pneumococci. Clinical features have little specificity (respiratory distress) and resemble those found in B streptococcus infections. The mother rarely exhibits symptoms at delivery. The severity of the prognosis is not related to resistance to the antimicrobial agents currently used in neonatal infections but to the infectivity of the organism itself and to the specific immunologic characteristics of premature neonates. The current use of amoxicillin and aminoglycosides in neonatal infections does not therefore need to be revised.

Humans↗
PubMed1988

[Metabolic and cardiovascular effects of beta-blockers taken by the mother in newborn infants].

The effects of beta-blockers administered to mothers with arterial hypertension were investigated in 38 neonates of varying gestational age and weight. During the first 48 hours of extra-uterine life, heart rate was continuously monitored and blood pressure and glycaemia were measured every 3 hours. Left ventricular function was studied by echocardiography on the first day post-partum, once again between the 5th and 10th days. Hypoglycaemia was observed in 42% of the neonates; 47% had one or several episodes of bradycardia and 2 had arterial hypotension. Most important, a significant improvement of left ventricular function was observed between the first and the 5th-10th days. This time-related change was not found in a control group. The cardiac dysfunction was more pronounced in neonates who had an episode of bradycardia, and although it is usually asymptomatic, it probably accounts for the fortunately rare cardiovascular collapses observed in some newborn babies.

Adrenergic beta-Antagonists↗
PubMed1986

[Value of continuous Doppler velocimetry for the diagnosis of patent ductus arteriosus].

A study of the curve of wave Doppler ultrasonography of 3 arterial axes (carotid, subclavian and femoral) was performed in 32 children in whom the diagnosis of patent ductus arteriosus was suspected. A continuous 8 MHz wave directional ultrasonic Doppler apparatus was used. At the level of subclavian and femoral arteries, patent ductus arteriosus is associated with a negative holodiastolic wave on the curve. At the carotid level, disappearance of the physiologic diastolic elevation may be the only change observed. Three groups were studied (1) 15 premature neonates with isolated murmur, (2) 15 premature neonates with respiratory distress and (3) 2 older children. In group 2, diagnosis of patent ductus arteriosus relies on clinical signs. A good correlation between Doppler and clinical data and/or TM ultrasonography was observed in 93% of cases.

Child↗