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Biomedical subjects

G Benzing

Publications and source records attributed to G Benzing.

At least 19 recordsLinked to original sources
PubMed1989

Epiglottitis in infants less than two years of age.

A retrospective review of 41 children less than two years of age was conducted to characterize the clinical presentation of epiglottitis in this young age group. Up to 25% of all cases of epiglottitis occur in children less than two years of age. The clinical presentation of patients in this young age group is variable. Signs and symptoms not routinely described in children over two years of age with epiglottitis but often observed in infants with epiglottitis include the absence of fever, the presence of only low grade fever, a significant history of antecedent URI, and a prominent "croupy" cough. These same features are often noted in children with the viral croup syndrome. A diagnosis of this life-threatening illness may be made promptly through an awareness of the presenting findings observed in infants. Young infants with epiglottitis can be safely managed with short-term nasotracheal intubation.

Airway Obstruction↗
PubMed1979

Nitroprusside and epinephrine for treatment of low output in children after open-heart surgery.

We evaluated the acute hemodynamic effects of treatment of the low output state with sodium nitroprusside and epinephrine in 13 children after intracardiac operation. The 13 patients were selected from a consecutive series of 106 children undergoing cardiopulmonary bypass. They had a cardiac index less than 2.0 L/min/m2, even after an increase in left ventricular filling pressure and during infusion of nitroprusside. Although the nitroprusside brought about a significant increase in cardiac output and decrease in systemic vascular resistance, the cardiac index remained critically low (less than 2 L/min/m2). Epinephrine resulted in a further significant increase in the cardiac index, without a significant change in systemic resistance. This study suggests that in selected patients the simultaneous use of both a vasodilator drug (sodium nitroprusside) and a positive inotropic agent (epinephrine) is advantageous in the short-term treatment of the low cardiac output state after intracardiac operation.

Adolescent↗
PubMed1977

Low-cost daily pacemaker monitoring system.

To reduce the cost of pacemaker monitoring, we developed an inexpensive cardiac pacemaker interval monitor that detects electromagnetic radiation of the electrical pulse generated by an implanted pacemaker. The pulse interval is timed by logic systems and a piezoelectric crystal. Pulse interval is computed to the nearest 0.1 msec. The device is battery powered and can be used at home by the patient to monitor pulse interval daily with little cost after the initial expenditure. The unit may also be used by the physician to detect the stability or constancy of random variation of the pulse interval. From a daily record of measurements of the pulse interval, limits are set by the physician to predict impending battery exhaustion. Eight patients have been monitored for up to 24 months.

Costs and Cost Analysis↗
PubMed1977

Left ventricular performance in the critically ill premature infant with patent ductus arteriosus and pulmonary disease.

Left cardiac dimensions and an index of left ventricular performance, the percent shortening of the internal diameter (%SID) of the left ventricle, were evaluated in premature infants who were asymptomatic, others with pulmonary disease and others with patent ductus arteriosus (PDA). In contrast to controls, left atrial and/or left ventricular end-diastolic dimensions were increased in all infants with clinical criteria of significant PDA. Postoperative dimensions decreased significantly. Percent SID values for normal premature infants (m=33.5%; SD=3.5%) and those with pulmonary disease alone did not differ significantly. In those with clinical criteria of PDA, who were subsequently found to have echocardiographic evidence of left cardiac enlargement, values for %SID were increased. As expected %SID values for individual patients represented a wider range of left ventricular function and/or afterload than for controls. Upon spontaneous or surgical closure of the PDA, %SID returned to normal. A PDA which is associated with left cardiac enlargement exhibits increased %SID, whereas decreasing %SID in the presence of increased dimensions suggests deteriorating myocardial performance. Echocardiography provides valuable insight into the cardiac status of these infants and may contribute to their medical and/or surgical management.

Ductus Arteriosus, Patent↗
PubMed1976

Cardiac performance and oxygen consumption during intracardiac operations in children.

Cardiac performance and oxygen consumption in 30 patients undergoing surgical treatment for congenital cardiac disease were determined from intraoperative measurements. Arterial pressure, cardiac index, mean left ventricular hydraulic output power, pulmonary artery oxygen saturation were obtained at average mean left atrial pressures of 8.1 and 15.2 cm H2O after cardiopulmonary bypass in 20 patients. These same variables were measured at an average pulmonary artery saturation of 65 and 75% in 30 patients. A composite of measurements of cardiac performance was desirable to guide precise patient care intraoperatively, especially if myocardial function was compromised. It is suggested that left atrial pressure be maintained at a level that results in a pulmonary artery saturation greater than 65%.

Adolescent↗
PubMed1976

Nitroprusside after open-heart surgery.

The effects of intravenous infusion of sodium nitroprusside were studied in 11 children immediately after open-heart surgery for congenital heart disease. The patients were selected because, following bypass, their cardiac index was below 2,0 L/min/m2 and their systemic vascular resistance exceeded 30 units. In order to eliminate the effects of preload, mean left atrial pressure was maintained at a constant level by blood transfusion. During infusion of nitroprusside the mean decrease of mean arterial pressure was 18.6%, of systemic vascular resistance was 53.7%, and the increase in cardiac index was 76.9%. All children recovered.

Blood Pressure↗