1.Subjective Symptoms and Flicker Test Values in Relation to Chronic Low Dose Organic Solvent Exposure.
Myung Ho SON ; Seok Joon SOHN ; Jin Su CHOI
Korean Journal of Preventive Medicine 1994;27(3):557-568
This study was conducted to examine the effect of chronic low dose organic solvent exposures in the industries towards then neurobehavioral functions of workers subjective symptoms on neurobehavioral function as well as a visual reaction time test (Flicker test) were administered to 94 exposed and 162 unexposed workers in a oil refinery and some other auto-repair shops. The results obtained were as follows: 1. Symptom complaints were higher and Flicker test values were lower in exposed workers than in unexposed workers. 2. Flicker values were inversely correlated with urinary Hippuric acid concentration in exposed workers (r=-0.26, p<0.05). 3. Flicker values were inversely correlated with subjective symptom score (r=-0.15, p<0.05). Low Flicker value were also related with some subjective symptoms such as "Dimmed vision", "Nightmare", "weakness on extremity" in workers as a whole. While symptoms of "Dimmed vision", "Nightmare" only observed among exposed workers.
Reaction Time
2.Visual Tracking Task Study of Koreans.
Ouk CHOI ; Soong Deuk KIM ; Sang Hui PARK
Journal of the Korean Ophthalmological Society 1977;18(2):175-182
This study aims to investigate visual tracking task of Koreans to the various visual stimuli by measuring the horizontal saccadic reaction times. The measuring system consists of eye monitor using infra-red reflection technique, oscillographic recorder and forehead-chin fixation devices. The visual stimuli generated by target function generator displayed simple-step, pulsestep and double-step stimulus patterns. The results revealed that the sacoadic reaction time showed no significant changes between the size of target displacement within horizontal 20 degrees. Furthermore, no significant changes between the particular direction of stimulus could be found. The nominal value of reaction time was 259 +/- 25 msec.
Reaction Time
3.Time intervals from the first symptom to surgery of ovarian malignancies in a tertiary government hospital.
Ma. Paula Rhove O. ALFABETO ; Jean Anne B. TORAL
Acta Medica Philippina 2022;56(6):75-82
Objective. This is a cross-sectional study aimed to determine the time intervals from the first symptom to surgery of 37 patients with ovarian malignancies who underwent surgery at a tertiary government hospital from June to October 2019.
Methods. Structured interviews of patients and chart reviews were conducted to identify the intervals and the reasons behind such. The data were analyzed using Stata/SE 14.1, with the time intervals presented as medians and the reasons as frequencies. Multinomial logistic regression analysis established the association of time intervals with the extent of surgery and final stage of ovarian malignancies.
Results. The median Total Time Interval from the first symptom to surgery was 214 days. The longest delay was the Total System Interval (from the first visit at the tertiary hospital to surgery) with a median of 70 days. This was followed closely by Patient Interval (from the first symptom to consult with the initial physician) with a median of 64 days. A distant third was the Initial Physician Interval (from the consult with the initial physician to the first visit at the tertiary hospital) with a median of 29 days. Most common reasons for the delays were the patients not acknowledging the gravity of their condition for the Patient Interval; choice to go to other hospitals, distance and laboratory works or diagnostics for the Initial Physician Interval; waiting for laboratory work-ups for the First System Interval; and waiting for other departments' clearance for the Second System Interval. The most common first symptom was abdominal enlargement. The length of interval and the final stage (p=0.056 for Stage III and p=0.162 for Stage IV)) as well as extent of surgery (p=0.093) did not show significant association.
Conclusion. The time interval from first symptom to surgery showed a median of 214 days. The greatest delay is contributed by Total System Interval followed by Patient Interval due to varying reasons. Length of time intervals, however, was not found to be significantly associated with the extent of surgery and final stage
Time-to-Treatment
4.Non-parametric clinical laboratory reference interval estimation in volunteer blood donors: An example for prothrombin time and partial thromboplastin time
Mark Angelo Ang ; Nelson Geraldino ; Ariel Vergel de Dios ; Marimin Abad-Lapuebla
Philippine Journal of Pathology 2022;7(2):23-27
Introduction:
To date, there are no reference intervals for prothrombin time (PT) and activated partial thromboplastin time (APTT) based on “normal” Filipino adults. The common practice in most laboratories is to adopt manufacturer provided values or foreign literature even if the importance of establishing or at least verifying laboratory reference intervals has been stressed by Clinical Laboratory Standards Institute (CLSI).
Objectives:
Here we aim to describe our experience in using a simple non-parametric method to generate reference intervals for PT and APTT, from healthy Filipino volunteer blood donors.
Methodology:
We used a de novo, a priori non-parametric estimation method following the CLSI guidelines on establishing reference intervals.
Results:
The non-parametric lower reference limit for PT is 12.55 seconds, with 90% confidence interval of 12.3 to 12.75 seconds. While the non-parametric upper reference limit for PT is 16.15 seconds, with 90% confidence interval of 15.55 to 16.55 seconds. The non-parametric lower reference limit for activated partial thromboplastin time is 26.12 seconds, with 90% confidence interval of 22.95 to 27.1 seconds, and the non-parametric upper reference limit for activated partial thromboplastin time is 37.44 seconds, with 90% confidence interval of 36.75 to 38.65 seconds. The PT and APTT reference intervals were different from foreign sources and manufacturer provided values in terms of interval width and values of the reference limits by 2 to 4 seconds.
Conclusion and Recommendations
Estimation of coagulation reference intervals from volunteer health blood donors is doable, simple, and practical. Collaborative multi-center efforts may be done to expand the pool of reference individuals that are included and increase the representativeness of the reference intervals generated. This simple method can also be used to generate reference intervals for other clinical laboratory assays and may also be extended to at least verify reference intervals in special populations like pregnant women, the elderly, and the pediatric population.
Prothrombin Time
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Partial Thromboplastin Time
5.Conversion method between local time and Beijing time.
Chinese Acupuncture & Moxibustion 2012;32(2):133-134
Humans
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Physiological Phenomena
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Qi
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Time
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Time Factors
6.Analysis of Decision-Reaction Time in Hemiparkinson's Disease.
Beom S JEON ; Ki Hyeong LEE ; Seong Ho PARK
Journal of the Korean Neurological Association 1994;12(3):512-517
15 parkinsonian patients with mainly unilateral symptoms (right side 10, left side 5) were studied in a decision reaction time (DRT) experiment in which the performance of the more affected hand was compared with that of the less affected hand. Decision time (DT) was longer in the more affected hand, however, the movement time (MT) did not differ between the two hands. In conclusion, slowness of movement in complex reaction response in Parkinsonian patients may be attributable to the defect of premovement central neural processing related to motor planning.
Hand
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Humans
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Reaction Time
8.Surgical Treatment of Using Acutrak Screw for Ankle Medial Malleolar Fracture.
Kwang Yeol KIM ; Hyoung Cheon KIM ; Su Han AHN ; Hyoung Jo YUN ; Sung Jun CHO
Journal of Korean Foot and Ankle Society 2010;14(1):84-89
PURPOSE: The purpose of this study is to evaluate the clinical and radiologic results of using Acutrak screws for treating ankle medial malleolar fracture. MATERIALS AND METHODS: We reviewed 38 cases of ankle medial malleolar fracture treated with Acutrak screws from February 2005 to May 2008. RESULTS: In clinical result, there were 30 exellent cases, 7 good cases, 1 fair case. In radiologic result, there is no case with reduction loss. Average union time is 10.5 weeks. CONCLUSION: We conclude that Acutrak screw fixation is a useful method for ankle medial malleolar fracture, there are many advantages in accurate anatomical reduction, small incision, short operative time.
Animals
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Ankle
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Operative Time
9.Should the therapeutic range be changed with new reagent for activated partial thromboplastin time?.
Korean Journal of Medicine 2000;59(5):489-490
No abstract available.
Partial Thromboplastin Time*
10.Comparison Between Worth Four-Dot and Polarized Four-Dot Test.
Journal of the Korean Ophthalmological Society 1998;39(7):1558-1562
To compare between the Worth 4-dot test(W4D) with polarized 4-dot test(P4D), we examined the interpretable response rate, response time, age of test failure, false positive rate and negative rate of reporting fusion in 133 patients older than 3 years of age. The interpretable response rate for W4D was 91% and for P4D 93.2%. The mean response times were 20.9 seconds for W4D versus 16.9 seconds for the P4D, the difference being statistically significant(p<0.05). The age of test failure for W4D was 4.8 years old and for P4D 3.8 years old. The false positive rate of reporting fusion for W4D was 4.5% and for P4D 8.8%. The false negative rate for W4D was 37.5%, while for P4D was 15.2%, the difference being statistically significant(p<0.05). In conclusion, the P4D was found to be less dissociative test by allowing more natural environment, and was easier, more rapid interpretable test. Therefore, the P4D may provide a more accurate assessment of a patients sensory status.
Humans
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Reaction Time