Corneal Sensitivity after Penetrating Keratoplasty

1993 ◽  
Vol 3 (2) ◽  
pp. 66-70 ◽  
Author(s):  
I. Tuğal Tutkun ◽  
K. Akarçay ◽  
L. Közer Bilgin ◽  
N. Sansoy ◽  
M. Urgancioğlu
Keyword(s):  
Correlation Analysis ◽  
Postoperative Period ◽  
Preoperative Diagnosis ◽  
Penetrating Keratoplasty ◽  
Test Results ◽  
Clinical Testing ◽  
Corneal Sensitivity ◽  
Graft Size ◽  
Progressive Improvement ◽  
Corneal Transplants

In order to determine corneal sensitivity after penetrating keratoplasty, 71 corneal transplants and their recipient beds were tested using the Cochet-Bonnet esthesiometer. The periods from surgery to examination were two weeks to 15 years. When the test results were divided into six groups according to the postoperative period, correlation analysis revealed a progressive improvement of sensitivity in the central and peripheral graft as well as in the recipient cornea. Only one graft had normal central sensitivity at 24 months; 36 grafts were completely anesthetic while 35 grafts had some level of sensitivity at the time of last clinical testing. Age, preoperative diagnosis or graft size were not correlated with the recovery of sensitivity. The extent and time of reinnervation in corneal grafts varied in individual patients.

scholarly journals Estimation of Outdoor PM2.5 Infiltration into Multifamily Homes Depending on Building Characteristics Using Regression Models

2021 ◽  
Vol 13 (10) ◽  
pp. 5708
Author(s):  
Bo-Ram Park ◽  
Ye-Seul Eom ◽  
Dong-Hee Choi ◽  
Dong-Hwa Kang
Keyword(s):  
Regression Analysis ◽  
Correlation Analysis ◽  
Field Test ◽  
Outer Surface ◽  
Regression Models ◽  
Field Tests ◽  
Test Results ◽  
Correlation And Regression Analysis ◽  
Building Characteristics ◽  
Pm2.5 Concentration

The purpose of this study was to evaluate outdoor PM2.5 infiltration into multifamily homes according to the building characteristics using regression models. Field test results from 23 multifamily homes were analyzed to investigate the infiltration factor and building characteristics including floor area, volume, outer surface area, building age, and airtightness. Correlation and regression analysis were then conducted to identify the building factor that is most strongly associated with the infiltration of outdoor PM2.5. The field tests revealed that the average PM2.5 infiltration factor was 0.71 (±0.19). The correlation analysis of the building characteristics and PM2.5 infiltration factor revealed that building airtightness metrics (ACH50, ELA/FA, and NL) had a statistically significant (p < 0.05) positive correlation (r = 0.70, 0.69, and 0.68, respectively) with the infiltration factor. Following the correlation analysis, a regression model for predicting PM2.5 infiltration based on the ACH50 airtightness index was proposed. The study confirmed that the outdoor-origin PM2.5 concentration in highly leaky units could be up to 1.59 times higher than that in airtight units.

scholarly journals Assessment of Educational Game Materials and Poster Practices with Rubrics by Expert Educators and Students

2018 ◽  
Vol 5 (13) ◽  
pp. 79
Author(s):  
Figen Altay ◽  
Kevser Bozkurt
Keyword(s):  
Correlation Analysis ◽  
Educational Games ◽  
Educational Game ◽  
Test Results ◽  
Knowledge Test ◽  
Significant Difference ◽  
Scoring Rubrics ◽  
Sample Test ◽  
The Difference ◽  
Poster Presentations

The purpose of this study was to investigate the difference between evaluations of the educational game materials and poster practices by students’ own peers and by expert educators using the rubrics created by expert educators and students together. Study included 10 students and 3 educators attended educational game materials course. Students were informed about basic skills of movement, game, game types, game equipment, analytical rubric, and educational game lectures were given to the students for 6 weeks and 80 minutes each week. 12-question knowledge test was used regarding educational games, analytical scoring rubrics, developing game materials and preparing posters. Materials and posters presented in the course were recorded. Evaluation scales were selected by students and expert teachers. Selected peers and educators evaluated 25 videos. One-way analysis of variance and correlation analysis were used for the reliability and repeatability measurements of the students and teachers. R values of 0.96-0.92 were found between students and 0.78-0.86 between educators. For knowledge tests of the groups, according to Wilcoxon paired two-sample test, there was a significant difference in test results (p<.05). The t test was used in the results of the student and educator video evaluations and there was no significant difference between the scores given by the expert educators and the students to the material and poster presentations (p>.05). In conclusion, this study showed that students could make evaluations as good as expert educators when given an answer key such as a scoring rubric that will help them in the evaluation.

Impact of Pre- and Intraoperative Factors on Endothelial Cell Density in the Early and Late Stage after Penetrating Keratoplasty

2021 ◽  
Author(s):  
Jessica Brand ◽  
Achim Langenbucher ◽  
Elena Zemova ◽  
Tanja Stachon ◽  
Melanie Weber ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Endothelial Cell ◽  
Correlation Analysis ◽  
Cell Density ◽  
Penetrating Keratoplasty ◽  
Endothelial Cell Density ◽  
Donor Age ◽  
Triple Procedure ◽  
Recipient Age ◽  
Weak Negative Correlation

Abstract Aim This retrospective investigated the impact of donor age, recipient age, donor endothelial cell density, vis-à-tergo, and additional intraoperative lens exchange (triple-procedure) on overall early and late phase postoperative endothelial cell density (ECD) following penetrating keratoplasty (PKP) in various diagnosis groups. Patients and Methods In 590 cases with diagnosed keratoconus (KC), Fuchs dystrophy (FD) and herpes simplex virus infection (HSV) who underwent PKP or triple surgery, the ECD in cells/mm2 was analysed, both preoperatively, with all-sutures-in (early postoperative stage), and after last suture removal. The factors were tested by Mann-Whitney U-test, correlation analysis and linear regression analysis. Outcome Correlation analysis demonstrated a weak negative correlation between the patientʼs ECD and donor age (early postoperative stage: r = − 0.25, p < 0.001; after last suture removal: r = − 0.16; p = 0.003). Regression analysis revealed that donor age did not impact postoperative patient ECD. There was a weak negative correlation between postoperative ECD and recipient age (early postoperative stage: r = − 0.31, p < 0.001; after last suture removal: r = − 0.34, p < 0.001). Regression analysis confirmed the negative impact of recipient age on patient ECD (early postoperative stage: β = − 13.2, p = 0.001; after last suture removal: β = − 4.6, p < 0.001). Correlation analysis determined a weak positive correlation between postoperative ECD and donor endothelial cell density (early postoperative stage: r = 0.37, p < 0.001; after last suture removal: r = 0.32, p < 0.001). Regression analysis also determined that donor endothelial cell density had a positive impact on postoperative ECD following last suture removal (β = 0.4, p < 0.001). Vis-à-tergo and additional lens exchange (triple procedure) had no significant effect on postoperative ECD (p > 0.05). This was also confirmed by the results of the regression analysis after last suture removal. Conclusion Recipient age and donor endothelial cell density have a significant impact on postoperative ECD following PKP. Not all of the statistical tests proved donor age to be a significant influencing factor. Vis-à-tergo and additional lens exchange (triple procedure) had no significant effect on postoperative ECD following PKP.

scholarly journals Earable RCC: Development of an Earphone-Type Reliable Chewing-Count Measurement Device

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Kazuhiro Taniguchi ◽  
Hisashi Kondo ◽  
Toshiya Tanaka ◽  
Atsushi Nishikawa
Keyword(s):  
High Probability ◽  
Test Results ◽  
Clinical Testing ◽  
Gastric Function ◽  
Measurement Device ◽  
Occlusal Force ◽  
Gum Chewing ◽  
Dementia Prevention ◽  
Gastric Cancer Patients ◽  
Future Plans

Gastric cancer patients having undergone gastrectomy are at a high risk of becoming malnourished owing to decreased gastric function. To prevent malnutrition, patients need to thoroughly chew a mouthful of food at least 30 times. For these gastrectomy patients requiring dietary support, we developed a chewing-count measurement device named earable RCC using an earphone-type sensor. Experiments to evaluate the performance of this device were conducted on six healthy volunteers who participated in “gum-chewing tests” and “almond-eating tests.” The precision calculated based on the results was ≥0.958, indicating that the earphone-type chewing-count measurement device could experimentally distinguish chewing from other actions. In addition, the recall calculated from the test results was ≥0.937, showing that the device does not miss chewing actions and can accurately count the number of chews with high probability at the timing of chewing. The experimental results also imply that earphone-type sensors may be used to measure swallowing, occlusal force, and tongue motion. Our future plans include clinical testing of the earphone-type chewing-count measurement device to determine its utility in patients who have undergone gastrectomy. We also intend to expand the application of this device for use in other patients to aid in dementia prevention and dietary support.

scholarly journals The results of reconstructive penetrating keratoplasty in the children

2016 ◽  
Vol 11 (4) ◽  
pp. 192-195
Author(s):  
Alla Vyacheslavovna Pleskova ◽  
E. V Mazanova
Keyword(s):  
Graft Survival ◽  
Postoperative Period ◽  
Penetrating Keratoplasty ◽  
Functional Results ◽  
Early Postoperative Period ◽  
Corneal Transplant ◽  
Fold Reduction ◽  
Corneal Opacities ◽  
The Difference ◽  
One Year

Objective. To evaluate the immediate and long-term biological and functional results of reconstructive penetrating keratoplasty (RPKP) in the children. Materials and methods. We undertook a comparative analysis of the outcomes of 86 cases of the surgical intervention on 74 children presenting with corneal opacities of different etiology who had been treated with the application of reconstructive penetrating keratoplasty based at the Department of Eye Pathology in Children, The Helmholtz Moscow Research Institute of Eye Diseases. All operations were made by the same surgeon during the period from 2008 to 2014. The results of reconstructive penetrating keratoplasty were compared with the outcomes of conventional penetrating keratoplasty. The biological results were evaluated in terms of the graft survival (Kaplan-Meir’s) model. The duration of the postoperative follow-up period ranged from 5 months to 8 years and averaged 20,8 ± 9,7 months in the children treated with the use of reconstructive penetrating keratoplasty and to 3,0 ± 15,4 months in the patients treated by means of conventional penetrating keratoplasty. Results. During the early postoperative period (within 1 and 6 months after surgery), the difference in the graft survival rate between the two groups was practically non-existent. After 1 month, the transparency of the transplanted cornea was fairly well preserved in the children of both groups, but persisted for 6 months only in 72% and 95% of the patients treated by reconstructive and conventional penetrating keratoplasty respectively. One year after surgery, the graft survival in the children treated with the use of reconstructive penetrating keratoplasty was documented in 54% of the cases in comparison with 78% in the patients treated by means of conventional penetrating keratoplasty. The difference between the two groups was statistically significant (p < 0,05). Two and three years after surgery, the transparency of the transplanted cornea in the children treated with the use of reconstructive penetrating keratoplasty fell down to 50% and 20% respectively. During the same periods, the transparency of the transplanted cornea in the children treated by means of conventional penetrating keratoplasty remained as high as 76% and 62% respectively. Conclusion. Although the combination of penetrating keratoplasty with other surgical modalities results in the almost three-fold reduction of the probability of engraftment of the transparent corneal transplant in the remote postoperative period in comparison with the standard implantation of the donor cornea transplant, this operation provides the only possibility for the restoration of vision in the children suffering from severe corneal pathology.

scholarly journals Risk factors and evaluation of keratoconus progression after penetrating keratoplasty with anterior segment optical coherence tomography

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Junko Yoshida ◽  
Tetsuya Toyono ◽  
Rika Shirakawa ◽  
Takashi Miyai ◽  
Tomohiko Usui
Keyword(s):  
Risk Factors ◽  
Optical Coherence Tomography ◽  
Penetrating Keratoplasty ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Optical Coherence ◽  
Graft Size ◽  
Corneal Power ◽  
Corneal Thinning

Abstract To determine the risk factors and unique characteristics of keratoconus (KC) progression after penetrating keratoplasty (PK), anterior segment optical coherence tomography parameters were statistically analyzed in comparison with eyes undergoing PK for other diseases as a control. Ninety-one eyes maintaining clear PK grafts for over 10 years were divided into 2 groups according to the primary indication for PK (KC vs Others groups). Corneal thinning indicators (inferior host thinnest corneal thickness/central corneal thickness [IHT/CCT], inferior graft thinnest corneal thickness/CCT [IGT/CCT]), were smaller whereas anterior chamber depth, and steepest corneal power (Ks), and maximum corneal power (Kmax) were larger in the KC group with statistical significance. Graft size, Kmax and Ks correlated with IHT/CCT and IGT/CCT in the KC group. These correlations were not detected in controls. Graft size and postoperative period were selected by multivariate regression analysis as factors for corneal ectatic changes in the KC group. In conclusion, KC eyes long after PK show inferior graft and host corneal thinning, and corneal protrusion. Corneal power parameters such as Kmax or Ks can be used to monitor KC progression after PK. A small graft might lead to KC progression after PK.

Korelasi Kinerja Pegawai Terhadap Keberhasilan Pendaftaran Tanah Sistematik Lengkap (PTSL) Tahun 2017 (Studi Kasus di Kantor Pertanahan Kabupaten Semarang)

Tunas Agraria ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 83-99
Author(s):  
Waode Rima Pratiwi ◽  
Suharno Suharno ◽  
Dwi Wulan Titik Andari
Keyword(s):  
Data Analysis ◽  
Data Collection ◽  
Correlation Analysis ◽  
Survey Research ◽  
Correlation Coefficient ◽  
Significant Positive Correlation ◽  
Employee Performance ◽  
P Value ◽  
Test Results ◽  
Land Registration

Abstract: The Implementation of Complete Systematic Land Registration (PTSL) 2017 at the Land Office of Semarang Regency successfully completed the entire target of 50,000 fields with achievement of 100% realization. The success of a Complete Systematic Land Registration (PTSL) activity is related from the Executor (ASN) side of the activity which will relate to the performance of the employees in carrying out PTSL activities, so it is necessary to prove this in order to optimize the performance of employees and various factors that support the performance of these employees in carrying out activities in accordance with the planned targets. This research is a survey research quantitative approach with research location in Land Office of Semarang Regency. Technique of data collection used are spreading questionnaires to respondents and study documents. Technique of data analysis is conducted by using Pearson Product Moment (PPM) correlation analysis using Statistical Product and Service Solutions (SPSS) program. The results showed that based on the test results of each employee performance supporting variable the most dominant positive and significant correlations were member variables, as evidenced by the correlation coefficient value r = 0.393 *, p-value = 0.029 with a significance of 97.1%, if the ability of members improved it will increase success in implementing PTSL. Overall, a significant positive correlation between employee performance against the success of PTSL implementation in 2017, as evidenced by the correlation coefficient r = 0.360, p-value = 0.016 with a significance of 98.4%, if the factors that affect employee performance are improved it will increase success in PTSL implementation. Based on the test results, the research hypothesis can be accepted. Keywords: correlation, employee performance, PTSL. Intisari: Pelaksanaan Pendaftaran Tanah Sistematik Lengkap (PTSL) Tahun 2017 di Kantor Pertanahan Kabupaten Semarang berhasil menyelesaikan seluruh target 100 %. Keberhasilan PTSL berhubungan erat dengan Pelaksana (ASN), penelitian ini dilakukan untuk mengetahui faktor yang mendukung kinerja pegawai dalam melaksanakan kegiatan PTSL. Metode penelitian dilakukan secara kuantitatif, analisa data dilaksanakan menggunakan analisis korelasi Pearson Product Moment (PPM). Hasil penelitian menunjukkan bahwa masing-masing variabel pendukung kinerja pegawai yang paling dominan berkorelasi positif dan signifikan adalah variabel anggota, terbukti dengan nilai koefisien korelasi korelasi r=0.393*, p-value= 0.029 dengan signifikasi sebesar 97.1%, jika kemampuan anggota ditingkatkan maka akan meningkatkan keberhasilan dalam pelaksanaan PTSL. Secara keseluruhan, korelasi positif yang siginifikan antara kinerja pegawai terhadap keberhasilan pelaksanaan PTSL Tahun 2017, terbukti dengan nilai koefisien korelasi r = 0.360, p-value= 0.016 dengan signifikasi sebesar 98.4%, jika faktor-faktor yang mempengaruhi kinerja pegawai ditingkatkan maka akan meningkatkan keberhasilan dalam pelaksanaan PTSL. Kata kunci: korelasi, kinerja pegawai, PTSL.

Sign in / Sign up

Export Citation Format

Share Document