Does the use of video improve patient satisfaction in the consent process for local-anaesthetic urological procedures?

PURPOSE: To assess patient satisfaction with the use of portable video media (PVM) for the purpose of taking informed consent for common urological outpatient procedures performed under local anaesthesia. METHODS: Patients undergoing the following procedures were approached for recruitment: flexible cystoscopy with or without biopsy, transrectal ultrasound-guided prostate biopsy or flexible cystoscopy with insertion or removal of a ureteric stent. Audio-visual media were developed for each procedure, with each script translated from English into isiXhosa and Afrikaans. The study involved a cross-over for each patient between standard verbal consent (SVC) and PVM consent, with each patient randomised to start with SVC or PVM consent. Each of these consent arms was assessed via a questionnaire. RESULTS: Sixty patients completed participation, with PVM as the first exposure for 28 patients and 32 patients receiving SVC as their first arm of the study. When comparing the overall satisfaction between SVC and PVM consent (the total scores out of 18 for the questionnaire), patients scored significantly higher for PVM consent (M = 16.3 ± 2.4) compared to SVC (M = 15.4 ± 2.9) (p = 0.002). 92% of the total patient sample preferred PVM consent. CONCLUSION: Portable video media proved superior to SVC in improving satisfaction in the consent process for common outpatient urological procedures performed under local anaesthesia.

Enhanced phytoremediation of volatile environmental pollutants with transgenic trees.

Small, volatile hydrocarbons, including trichloroethylene, vinyl chloride, carbon tetrachloride, benzene, and chloroform, are common environmental pollutants that pose serious health effects. We have developed transgenic poplar (Populus tremula x Populus alba) plants with greatly increased rates of metabolism and removal of these pollutants through the overexpression of cytochrome P450 2E1, a key enzyme in the metabolism of a variety of halogenated compounds. The transgenic poplar plants exhibited increased removal rates of these pollutants from hydroponic solution. When the plants were exposed to gaseous trichloroethylene, chloroform, and benzene, they also demonstrated superior removal of the pollutants from the air. In view of their large size and extensive root systems, these transgenic poplars may provide the means to effectively remediate sites contaminated with a variety of pollutants at much faster rates and at lower costs than can be achieved with current conventional techniques.

Expression of functional mammalian P450 2E1 in hairy root cultures.

P450 2E1 is an important mammalian liver enzyme known to metabolize a wide range of compounds including several common environmental pollutants. The medicinal plant, Atropa belladonna, was transformed with Agrobacterium rhizogenes containing a binary vector with rabbit P450 2E1 in either the sense or antisense orientation. The resulting "hairy roots" were isolated and grown in liquid medium. Production of P450 2E1 protein was verified in the roots containing the 2E1 gene in the sense orientation. Transgenic and control root cultures were dosed with the environmental pollutant, trichloroethylene (TCE), and were analyzed for the TCE metabolites, chloral and trichloroethanol. The root cultures expressing the mammalian P450 2E1 had increased levels of the metabolites compared to the levels in the control roots. This method represents a quick way to screen transformants for expression of foreign genes before regeneration of whole plants, and also as a possible source of foreign protein for purification.