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Biomedical subjects

J F Sullivan

Publications and source records attributed to J F Sullivan.

103 records · Page 6Linked to original sources
PubMed1966

Role of differential air pressure zones in the control of aerosols in a large animal isolation facility.

The uncontrolled transmission of hog cholera in a large animal isolation facility, designed to control the movement of aerosols within and between individual wings of a multiunit building, indicated the need for a critical study of aerosol behavior under existing conditions of operation. Studies with aerosols of Escherichia coli B T3 bacteriophage (T3 coliphage) conclusively demonstrated the impossibility of obtaining the desired control by means of a "static" air balance relationship between adjacent areas within the facility. Modifications needed to provide the desired control of the air-handling system are outlined and discussed.

Aerosols↗
PubMedDate not supplied

Serum magnesium and copper levels in myocardial infarction.

The serum levels and urinary excretion of magnesium and copper were studied in 66 patients with either acute myocardial ischemia or myocardial infarction. Serum for magnesium and copper determinations was obtained daily for three days. The initial serum magnesium levels were normal in patients with ischemia but were low in some patients with myocardial infarction. Patients developing ventricular arrhythmias with myocardial infarction showed the lowest levels of serum magnesium. Copper in the serum appeared elevated in patients developing acute congestive heart failure but the elevation was not statistically significant. These data indicate that a decrease in serum magnesium as evaluated may be associated with ventricular arrhythmias in patients with myocardial infarction; thus continued observations of magnesium levels in the myocardial infarction patient is warranted.

Arrhythmias, Cardiac↗
PubMedDate not supplied

Single-needle venous dialysis: a comparison of three systems.

Single-needle dialysis with femoral vein access was performed on three patient groups using a pressure/time (Vital-Assist) device, a time/time device (Gambro, AK10), and a pressure/pressure device (Cobe Double Blood Pump). Each patient was dialyzed using the same parallel plate dialyzer (PPD 1.3). For each treatment, recirculation was calculated and the clearance of urea and creatinine was determined, both from dialysate content and A-V concentration differences. Recirculation was high (38%) with the Vital-Assist but under 10% with both AK10 and Double Blood Pump. The relatively higher blood flow of the Vital-Assist (180 ml/min) and lower blood flow of the AK10 (100 ml/min) resulted in comparable clearances of urea (80 ml/min) and creatinine (60 ml/min) for these two systems. The Double Blood Pump, with a blood flow of 140 ml/min achieved urea and creatinine clearances of 110 and 80 ml/min. The clearances actually measured were in good agreement with those predicted from theoretical considerations of recirculation and blood flow in a countercurrent dialysis system.

Blood Flow Velocity↗