Over the past 20 years, giving preoperative information to patients has been recognized as benefiting them greatly (Hayward, 1975; Boore, 1978). Similarly, preoperative visits by theatre nurses have been widely advocated to allay patient anxiety. This article discusses preoperative visiting from the perspective of its value to theatre nurses, particularly in the planning of patients' nursing care and in the application of nursing models and a team approach to the delivery of care. In so doing, preoperative visiting may be a life-line for theatre nurses at a time when their unique contribution within the operating theatre is increasingly under scrutiny (Bevan, 1989).

Anxiety↗

PubMedDate not supplied

Hypertension and associated risk factors in young African-American women attending a community health and wellness center.

Explore the source record for details and available documents.

Adult↗

PubMedDate not supplied

Liquid chromatographic preparative method for isolating ergot alkaloids, using a particle-loaded membrane extracting disk.

A liquid chromatographic method is described for the determination of ergot alkaloids in wheat. Ergonovine, ergotamine, ergocornine, alpha-ergocryptine, and ergocristine are extracted from wheat with methanol-0.25% concentrated H3PO4 (40 + 60) pH 2.2, cleaned up by using a solid-phase extraction (SPE) disk, and separated by reversed-phase liquid chromatography with fluorescence detection. Ergot alkaloids are basic compounds that form water-soluble salts in acidic aqueous solution. Because ergot alkaloid salts are positively charged, they can be easily and selectively trapped on a negatively charged strong cation-exchange SPE disk. A strong wash solvent, methanol-0.25% concentrated H3PO4 (40 + 60) was used to remove matrix interferences not bonded by ionic interactions with the cation-exchange column. The ergot alkaloids were eluted from the ion-exchange column by adjusting the pH of the elution solvents to slightly basic conditions (pH 9). The SPE disk concentrated and cleanly separated the ergot alkaloids from matrix interferences. Standard calibration curves for ergot alkaloids for the concentration range 0.1-2.0 microg/mL were linear. The SPE disk had a column capacity equivalent to about 1 g extracted wheat. At spiking levels of 2.3-46 ng/g for ergonovine and 20-400 ng/g for ergotamine, ergocornine, alpha-ergocryptine, and ergocristine, the mean recovery was 88.1% with a coefficient of variation (CV) of 5.33%. The recovery data ranged from 79.1 to 95.9%. Ergonovine had the lowest overall recovery and the largest CV. The method has an estimated reliable limit of detection and limit of quantitation of <5 and <20 ng/g, respectively, for each ergot alkaloid tested.

Chromatography, Liquid↗

PubMedDate not supplied

Limited survey of deoxynivalenol in wheat and corn in the United States.

A limited survey was conducted over a 2-year period to determine the incidence and levels of deoxynivalenol (DON) in corn and wheat grown in selected areas of the United States. Samples of corn (198) and wheat (247) were collected and analyzed by a gas chromatographic method. Sixty-six percent of the corn samples collected in 1984 and 30% of the corn samples collected in 1985 contained DON. The average concentration of DON in corn, by state, ranged from 0.11 to 1.20 micrograms/g; the maximum concentration was 2.47 micrograms/g. Only 2 of the 247 samples of wheat contained DON at a concentration greater than 2 micrograms/g, which is the level of concern suggested by the Food and Drug Administration for wheat entering the milling process for human consumption.

Sesquiterpenes↗

PubMedDate not supplied