Management of aortic arch aneurysm using profound hypothermia and circulatory arrest.

The cases of 9 patients with aneurysms involving the aortic arch, repaired under profound hypothermia (average, 15.5 degrees C) and circulatory arrest, are presented. Five patients underwent elective operation and 4, emergency operation.

Combined coronary artery bypass graft and abdominal aortic aneurysmectomy.

Six cases of combined coronary artery bypass graft and abdominal aortic aneurysmectomy were performed in a 1-year period at the Washington Hospital Center. All cases except one were uncomplicated and the average hospital stay for patients with no complications was less than 10 days. We found that there were distinct advantages in combining these two procedures.

Reoperation for coronary artery disease.

Forty-two reoperations for myocardial revascularization were done in 40 patients. Seventeen of them (1%) are from our series of 1,700 patients. Average number of grafts per patient was 2.

Preparing an arterial patch graft.

Patch grafts frequently are used following endarterectomy for short-segment arterial disease. On occasion they are used to increase flow through stenotic areas where endarterectomy might be counterproductive. The following article delineates a fairly efficient way of preparing patch grafts in a reproducible manner.

Sampling and analysis of acetic anhydride in air.

This paper describes the development of a new method for monitoring acetic anhydride in the presence of acetic acid in the occupational environment. The method consisted of collecting airborne acetic anhydride on a solid sorbent, desorbing it with acetone and analyzing it by gas chromatography. During the development of this method various parameters such as selection of column, selection of solid sorbent, selection of desorber solvent, effects of humidity, flow rate, total sample volume, desorption efficiency, and shelf-life of samples were studied.

A new method for monitoring personal exposure to ethylene oxide in the occupational environment.

A novel method for monitoring occupational exposure to ethylene oxide was developed. Ethylene oxide was collected on Columbia JXC activated carbon, desorbed with carbon disulfide, and analyzed by gas chromatography using a TERGITOL TMN or UCON LB55OX column. Several parameters such as selection of adsorbent and column; effects of humidity, sampling rate and volume; shelf-life; interference from ten contaminants; desorption technique and calibration curve were investigated.

Identification of polcyclic aromatic hydrocarbons in semi-reinforcing furnance carbon black.

A weighed amount of a "special" semi-reinforcing (SRF) carbon black, made in 1964 and not considered to be typical for furnace blacks, was extracted with triple distilled benzene for 24 hours. The separation of carcinogens from the benzene extract was achieved by gas chromatography on a 5 ft x 0.25 inch stainless steel column packed with 3% OV-1 on chromosorb W.