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Biomedical subjects

J B McDonald

Publications and source records attributed to J B McDonald.

4 recordsLinked to original sources

Twenty-four-hour single-container system for parenteral nutrient admixtures.

Development and implementation of a procedure for preparing parenteral nutrient (PN) solutions in 3-L containers at a 385-bed teaching hospital is described. After identifying problems in procedures for PN therapy, pharmacists collected time and cost data for preparing PN solutions using gravity flow and 1-L containers versus an automated compounding device and 3-L containers. They prepared a proposal for mixing a single daily solution in a 3-L container. A change in hospital policy to permit each PN solution to hang for 24 instead of 12 hours, a change in the pharmacy's schedule for preparing PN solutions, and a policy of hanging all fresh PN solutions between 1800 and 2400 were also proposed. After a one-month trial, the new procedures were adopted. To prepare an average of six PN solutions per day, time decreased from 5.32 to 2.33 hours. Inventory of PN supplies was reduced by 56%. Patients were charged approximately $25 less for three liters of PN solution. Standardized procedures improved efficiency of order filling. A standard procedure for preparing parenteral nutrient solutions in 3-L containers resulted in cost savings for the hospital and the patients and more efficient patient care.

Costs and Cost Analysis↗

Effectiveness of leg compression in preventing venous stasis.

To compare the ability of intermittent calf compression with that of sequential leg compression to prevent venous stasis, the clearance time of radiopaque dye, as determined by sequential phleborheograms performed on anesthetized patients, were compared. Calf compression was superior to no compression in clearing the dye from the calf alone, but did not aid clearance from the rest of the leg. Sequential leg compression was superior to intermittent calf compression in clearing dye from the calf and popliteal areas. Since intermittent leg compression has been as effective as small-dose heparin therapy in preventing postoperative deep venous thrombosis [7], the use of sequential leg compression may prove to be more effective and have less complication than heparin administration.

Humans↗

Tuberculosis of the colon simulating carcinoma.

A case of tuberculosis mimicking carcinoma in the distal colon is reported. The difficulty in diagnosing a solitary tuberculous colonic lesion, a review of the literature, and a differential diagnosis are presented.

Colonic Diseases↗