Female genital injury—which findings have to be considered physiological using colposcopy with and without toluidine blue dye?

This study aimed to assess the validity and efficacy of blue dye in colposcopic assessment of genital injury in pre- and postmenopausal women with and without history of consensual sexual intercourse. Two hundred women were prospectively enrolled and examined colposcopically with and without toluidine blue dye in order to detect and categorize genital lesions (laceration, bruise and abrasion). Examination of genital trauma was accomplished in a standardized way and findings were photo documented. A wide range of influencing factors with a potential impact on prevalence and nature of genital injury was recorded beforehand using a questionnaire. The frequency of diagnostic injury differed substantially depending on the examination technique, ranging from 9% using colposcopic magnification only to 28% with the additional use of toluidine blue dye. A vertical laceration affecting the posterior fourchette was the most frequent lesion detected (17%, n = 32). Menopausal status seems to have significant impact on genital injury prevalence (p = 0.0165), as 42% (16/ 38) of postmenopausal compared to 24% (36/ 151) of premenopausal women had at least one genital lesion. Furthermore, vaginal medication (p = 0.0369), vaginal dryness (p = 0.0228), dyspareunia (p = 0.0234) and low frequency of sexual intercourse (p = 0.0022) were found to significantly correlate with the presence of genital lesions. According to our findings, standardized colposcopy in combination with toluidine blue dye facilitates accurate assessment of genital lesions. Genital trauma situated at another site than the posterior part of the vaginal introitus seems to be uncommon after consensual intercourse.

Toluidine Staining as a Screening Tool for Soft Tissue Margins of Cancerous Oral Lesions

Background:As the world is becoming advanced, the number of diseases also seems to be increasing. Mouth cancer and oral lesions are known as dangerous and fatal diseases. The experimentation is in the process. The problem is not new; it has been the cause of deaths of many patients since many decades. The increase in cancer patients has been recorded up to 43% in the last 8.1 years and it has been observed that most of the cancerous cells are malignant at the time of diagnosis and treatment.It is mandatory for the physician or the dental experts to diagnose oral cancer in the early stage and remove the tumor along with safe margins to decrease the chances of reoccurrence of the disease.The objective of the study is to detect the usefulness of the toulidine blue dye as a cost effective, less time consuming and a user-friendly screening tool for the tumor margins intra-operatively.Methods:Fifty patients with biopsy proven oral squamous cell carcinoma who were advised surgical resection as a treatment plan, independent of the grade and stage of the tumor, by the department of Oral and Maxillofacial surgery of Dow University of Health Sciences were considered to undergo intra-operative toluidine blue dye staining and the results were compared and confirmed by the frozen biopsy section of the same margin.Results:Total fifty patients were participated in this study involving multiple margins. 86% agreement was present between the dye and the biopsy and the sensitivity of the dye appears to be 74% as 20 cases out of 27 showed true positive results yet specificity of the dye remains 100% as all 23 cases displayed true negative results. Conclusion:Toluidine blue dye has demonstrated to be a safe, convenient and time saving method of screening of the margins as it takes less than 5 minutes in its application and result starts to appear in within 3 to 5 minutes. Yet bigger lesions are yet to be focused as they have chances of giving false results. Moreover there is room for research in this aspect as the screening character of this dye is yet to be proved.

Removal Color Study of Toluidine Blue dye from Aqueous Solution by using Photo-Fenton Oxidation

The degradation of Toluidine Blue dye in aqueous solution under UV irradiation is investigated by using photo-Fenton oxidation (UV/H2O2/Fe+). The effect of initial dye concentration, initial ferrous ion concentration, pH, initial hydrogen peroxide dosage, and irradiation time are studied. It is found put that the removal rate increases as the initial concentration of H2O2 and ferrous ion increase to optimum value ,where in we get more than 99% removal efficiency of dye at pH = 4 when the [H2O2] = 500mg / L, [Fe + 2 = 150mg / L]. Complete degradation was achieved in the relatively short time of 75 minutes. Faster decolonization is achieved at low pH, with the optimal value at pH 4 .The concentrations of degradation dye are detected by spectrophotometer at ?max =626 nm. The order of photo degradation reaction under UV is the first order kinetics. The photo-Fenton degradation process was monitored by UV-visible spectrophotometer.

Photodegradation Study of Toluidine Blue Dye in Aqueous Solution using Magnesium Oxide as a Photocatalyst

The photocatalytic degradation of Toluidine Blue dye (TB) in aqueous solution was investigated under UV light in the presence of magnesium oxide (MgO) as a photocatalyst at different operating parameters. The operating conditions were photocatalyst dose, initial dye concentration and the pH of the solution. Increasing of photocatalyst dose from 10 to 70 mg enhanced the degradation rate of TB dye. However, the increasing of TB dye concentration from 2 to 8 mg/L negatively affected the degradation rate. It was found that the percent of dye removal reached the maximum value at high acidic medium. In dark condition, 15 % of dye was adsorbed by MgO. Furthermore, the kinetics involved in the degradation of TB dye was examined and the degradation was found to follow pseudo first order kinetic model.