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Biomedical subjects

H E Lee

Publications and source records attributed to H E Lee.

27 records · Page 2Linked to original sources
PubMed1983

Premixed intravenous admixtures: a positive development for hospital pharmacy.

The development of premixed intravenous admixtures is reviewed in a historical context, and its effects on hospital pharmacy practice are discussed. As pharmaceutical manufacturers introduce more i.v. medications in ready-to-use containers, the same complaints that were voiced by pharmacists about unit dose packaging and ready-to-dispense tablets and capsules are being aired. But premixed i.v. admixtures are a logical extension of the basic unit dose principle of providing a readily identifiable and ready-to-administer dose. The time and cost savings these products offer are needed in hospital pharmacies. Some of the disadvantages of these products--including storage and freezer space and multiplicity of administration systems--are overcome by proper planning and education of personnel. If fewer personnel are now needed to prepare i.v. admixtures, then those personnel should be used to improve patient care in other ways. The use of premixed i.v. admixtures is a positive technological advance in drug packaging. Its advantages outweight its disadvantages, and it will soon be become the universally accepted form of i.v. drug packaging.

Drug Combinations↗
PubMed1982

[The effect of eugenol cement, CC, FC on the bonding strength of the adhesive resin to the tooth surface (author's transl)].

Bovine tooth surface pretreated with dental medicaments-Eugenol cement (ZOE), CC, FC was used to adhere to acrylic rod by adhesive resins-Clearfil F II and 4 META-MMA-TBB-O. The effects of the dental medicaments on the bonding strength of the adhesive resin were measured. The results were showed as follows: (1) Any pretreatment of the three medicaments reduced the bonding strength of Clearfil to both enamel and dentin surface. With 4-META-MMA-TBB-O resin system the bonding strength was reduced by ZOE and CC while it was increased by FC pretreatment. (2) On the enamel tooth surface premedicated with ZOE, FC or CC, the alcohol rinsing or mechanic grinding reduced the decrease of the bonding strength of Clearfil. With 4-META-MMA-TBB-O resin, the mechanic grinding of the premedicated enamel tooth surface increased the bonding strength. (3) On the premedicated dentin tooth surface, the mechanic grinding reduced the decrease of the bonding strength of 4-META-MMA-TBB-O. Alcohol rinsing, on the contrary, decreased the bonding strength. (4) On both fresh and premedicated dentin surface the bonding strength of Clearfil was lower than 3 MPa.

Acrylic Resins↗
PubMed1980

Effects of primary nursing on pharmaceutical services.

The effects of primary care nursing on the provision of pharmaceutical services are discussed. Primary care nursing poses advantages and disadvantages for pharmacy. It makes communications and distribution more complex, except when pharmaceutical services are decentralized. Introduction of innovative patient care pharmaceutical services has been made more difficult. Solutions to these problems include assigning pharmacist/technician teams to specific patient-care areas, orienting nursing staff to the pharmacy department, and establishing committees to handle potential problems.

Medication Systems, Hospital↗
PubMedDate not supplied

Stresses at the cervical lesion of maxillary premolar--a finite element investigation.

OBJECTIVES: The objective of this study was to use a three-dimensional (3-D) finite element model to investigate normal stress distribution to substantiate the tooth flexure mechanism. The study also compared the changes in the stresses by different occlusal loading sites and directions. METHODS: The 3-D finite element analysis was used. A maxillary premolar was selected to construct the simulation model. The model was constructed step-by-step for convergence and validity. Seven load conditions for various load sites and different directions were simulated to the model. RESULTS: The maximal principal stress and minimal principal stress distributions developed within the structures of seven load conditions were output and their stress distributions on z-plane at the vertical midline were shown. The peak tensile stress of the cervical area for various load conditions were compared and listed. CONCLUSIONS: This study has shown that the presence of tensile stresses in the cervical region of a maxillary premolar by various loading sites and different directions. The results coincided with the stress-induced theory, hence sustaining it. The relationship of the affected factors of leverage to the development of cervical abfraction lesions, was explored.

Bicuspid↗