No Abstract Available.
Volunteers*

INTRODUCTION: Student volunteers in COVID-19 vaccination activities help augment the health care workforce. However, there is a lack of literature that explores student volunteerism in the Philippines. This paper analyses the shared meanings of the lived experiences of volunteer nursing students during a pandemic. METHODS: Student nurses who had joined Red Cross vaccination activities were recruited by purposive sampling and interviewed online using a pilot-tested interview guide with open-ended questions. Participants were recruited until data saturation. The data collected was analyzed using Colaizzi’s Seven-Step Method. RESULTS: The study has identified two main themes that describe the phenomenon of student- nurse volunteerism during COVID-19 vaccination programs: 1) personal motivation and 2) perceived benefits and outcomes. There were four sub-themes under personal motivation - desire for personal growth, intrinsic altruism, past experiences and involvement in volunteer work, and opportunity for advocating against vaccine hesitancy. Perceived benefits and outcomes had two sub-themes - sense of fulfillment in the act of volunteering and opportunity for actual nurse-patient interaction. CONCLUSION The findings from the study suggest that, despite the lack of experience of working as frontliners during the COVID-19 vaccination programs, nursing students volunteered due to personal motivations and perceived benefits and outcomes.
Volunteers

PURPOSE: To evaluate the magnetization transfer ratio(MTR) of various normal structures and pathologiclesions, as seen on magnetization transfer T2-weighted images (MT+T2WI). MATERIALS AND METHODS: In ten normalvolunteers, T2-weighted images without MT (MT-T2WI) and with MT(MT+T2WI) were obtained. Off-set pulses used inMT+T2WI were 400, 600, 1000, 1500, and 2000Hz. In 60 clinical cases infarction(n=10), brain tumors(n=5), traumatichematomas(n=5), other hematomas(n=3) vascular malformation(n=2) white matter disease(n=2) normal(n=31) andothers(n=2), both MT-T2WI and MT+T2WI images were obtained using an off-set pulse of 600 Hz. In all volunteers andpatients, MTR in various normal brain parenchyma and abnormal areas was measured. RESULT: The MTRs of white andgray matter were 48% and 45% respectively at 400 Hz, 26% and 22% at 600Hz, 12% and 11% of 1000Hz, 10% and 9% 1500HZ, and 9% and 8% at 2000Hz of RF. The MTR of CSF was 43% at 400 Hz of off-resonance RF, while the contrastresolution of T2WI was poor. An off-resonance of 600Hz appeared to be the optimal frequency. In diseased areas,MTRs varied but were usually similar to or lower than those of brain parenchyma. CONCLUSION: The optimaloff-resonance RF on MT+T2WI appears to be 600 Hz for relatively high MTR of brain parenchyma and low MTR of CSF,in which MTRs of white and gray matter were 26% and 22%, respectively, of 600Hz off-set pulse. The MTRs ofcerebral lesions varied and further studies of various cerebral lesions are needed.
Brain* ; Volunteers

OBJECTIVE: This study was performed to validate the autonomous maximal smile (AMS) as a new reference for evaluating dental and gingival exposure. METHODS: Digital video clips of 100 volunteers showing posed smiles and AMS at different verbal directives were recorded for evaluation a total of three times at 1-week intervals. Lip-teeth relationship width (LTRW) and buccal corridor width (BCW) were measured. LTRW represented the vertical distance between the inferior border of the upper vermilion and the edge of the maxillary central incisors. Intraclass correlation coefficients (ICCs) for reproducibility, and the m-value (minimum number of repeated measurements required for an ICC level over 0.75), were calculated. RESULTS: LTRW and BCW of the AMS were 1.41 and 2.04 mm, respectively, greater than those of the posed smile (p < 0.05), indicating significantly larger dental and gingival exposure in the AMS. The reproducibility of the AMS (0.74 to 0.77) was excellent, and higher than that of the posed smile (0.62 to 0.65), which had fair-to-good reproducibility. Moreover, the m-value of the AMS (0.88 to 1.05) was lower than that of the posed smile (1.59 to 1.85). CONCLUSIONS: Compared to the posed smile, the AMS shows significantly larger LTRW and BCW, with significantly higher reproducibility. The AMS might serve as an adjunctive reference, in addition to the posed smile, in orthodontic and other dentomaxillofacial treatments.
Incisor ; Volunteers

OBJECTIVES: We conducted this study to provide standardized data of the computerized Standard Progressive Matirices(SPM)test in Korean adults. METHODS: The computerized SPM test was administered to 353 healthy volunteers aged 18 years over. We provided the standardized data(percentile and standardized T-scores)for the groups with similar mean and distribution of SPM scores, which was originally divided by age and sex. The validity of the new standardized data was tested by comparing IQs estimated by SPM and K-WAIS. RESULTS: The standardized SPM data were provided for four age groups: 18 to 30 years, 31 to 40 years, 41 to 50 years, 51 years and over. IQ estimated by this standardized data tends to be closer to IQ by K-WAIS than the IQ estimated by foreign normative data. CONCLUSION: The standardized data of the computerized SPM were proven to be a useful and valid tool for measuring IQ briefly, compared with the conventional way of measuring IQ.
Adult* ; Healthy Volunteers ; Humans

No abstract available.
Health Occupations* ; Volunteers*

OBJECTIVES: The purpose of this study was to compare the shade changes in wet and dry conditions of natural teeth using two different intra-oral colorimeters. MATERIALS AND METHODS: Twenty volunteer subjects have no restorations and fillings in the maxillary central incisors were involved in this clinical study. The color of tooth was measured by two different instruments that were a Shade Scan(TM) System and a VITA Easyshade(R), Five times consecutive measurements were done for each subject with both instruments. Groups of measurement are an initial wet condition as control, dry in 5 minutes, 15 seconds after re-wetting with saliva, re-wetting after 5minutes and re-wetting after 30 minutes. Using ShadeScan System(TM), tooth image was captured and converted to the mapping image of Vitapan 3D master. Three main shades were chosen from each subject and calculated the area in Global Lab Image software. Data were analyzed using paired T-Test and Wilcoxon Signed Ranked Test. Using VITA Easyshade(R), color differences(deltaE) between measurements were analyzed with one sample T-test. RESULTS: Using ShadeScan System(TM), there were significant differences between control group and dry(P=.023), dry and re-wetting 15 seconds, 5 minutes, 30 minutes as well(P=.021, P=.017, P=.030) in comparison of primary shade. However, comparing three main shades, there was no significant difference between control and dry(P=.105). Using VITA Easyshade(R), color differences(deltaE) between control and dry, dry and re-wetting 30 minutes were statistically different(P=.002, P=.022). CONCLUSION: Primary shade could be changed in dry and wetting procedure in time, however there was no significant shade changes in overall.
Incisor ; Saliva ; Tooth* ; Volunteers

Saccadic velocity was measured using Life-Tech's Visulab apparatus(saccadic velocity measuring module) in 37 healthy males aged from 24 to 25 yrs. Interfixational amplitude was 30 degrees(15 degrees left from the center and 15degree right from the center) and each fixation lamp was on for one second alternately and volunteers were instructed to fix left target for one second and then right target for one second alternately. Saccadic velocities were measured three times and these results were averaged. The mean saccadic velocity toward right and left was 578 degrees +/- 84/sec and mean saccadic velocity from right to left was 576 degrees +/- 88/sec and that from left to right was 580 degrees +/- 81/sec. There was no statisiticaly significant velocity difference between leftward and rightward velicities.
Humans ; Male ; Volunteers

Saccadic velocity was measured using Life-Tech's Visulab apparatus(saccadic velocity measuring module) in 37 healthy males aged from 24 to 25 yrs. Interfixational amplitude was 30 degrees(15 degrees left from the center and 15degree right from the center) and each fixation lamp was on for one second alternately and volunteers were instructed to fix left target for one second and then right target for one second alternately. Saccadic velocities were measured three times and these results were averaged. The mean saccadic velocity toward right and left was 578 degrees +/- 84/sec and mean saccadic velocity from right to left was 576 degrees +/- 88/sec and that from left to right was 580 degrees +/- 81/sec. There was no statisiticaly significant velocity difference between leftward and rightward velicities.
Humans ; Male ; Volunteers

PURPOSE: To evaluate the effect of topical pilocarpine on basic tear secretion, using the Schirmer test. METHODS: The Schirmer test was performed in 22 eyes of 11 healthy volunteers before instillation and at 10, 20, and 30 minutes after instillation of 1% pilocarpine and in 22 eyes of 12 healthy volunteers before instillation and at 10, 20, and 30 minutes after instillation of 2% pilocarpine. As for control group, the Schirmer test was performed in 22 eyes of 11 healthy volunteers by the same method except with normal saline. RESULTS: The ratio of tear secretion was calculated by dividing the wet length of a Schirmer strip after instillation by the wet length before instillation for comparative analysis. In the control group, the mean ratio decreased with time to 0.78 at 10 minutes, 0.64 at 20 minutes, and 0.63 at 30 minutes after instillation of normal saline. In the 1% pilocarpine group, the mean ratio decreased with time, but there was no significant difference in comparison to the ratio of the control group. In the 2% pilocarpine group, the ratio increased significantly to 1.28 (p<0.001) at 10 minutes, 1.07 (p=0.002) at 20 minutes, and decreased to 0.63 (p=0.041) at 30 minutes after instillation. CONCLUSIONS: The basic tear secretion did not change significantly after instillation of 1% pilocarpine but increased significantly at 10 minutes after instillation of 2% pilocarpine to the highest level observed, which was followed by a decrease in basic tear secretion.
Healthy Volunteers ; Pilocarpine* ; Tears*