scholarly journals Comparison among TonoVet, TonoVet Plus, Tono-Pen Avia Vet, and Kowa HA-2 portable tonometers for measuring intraocular pressure in dogs

2021 ◽  
pp. 2444-2451
Author(s):  
João Victor Goulart Consoni Passareli ◽  
Felipe Franco Nascimento ◽  
Giovana José Garcia Estanho ◽  
Claudia Lizandra Ricci ◽  
Glaucia Prada Kanashiro ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Correlation Coefficient ◽  
Strong Correlation ◽  
Outpatient Clinics ◽  
Excellent Correlation ◽  
Postmortem Study ◽  
Iop Measurement ◽  
Outpatient Study ◽  
Healthy Eyes

Background and Aim: Tonometers are an important instrument for measuring intraocular pressure (IOP) in the diagnosis of glaucoma or uveitis. This study aimed to compare the accuracy of the main types of tonometers with different IOP measurement methodologies in dogs: TonoVet and TonoVet Plus (rebound), Tono-Pen Avia Vet (applanation), and Kowa HA-2 (Goldmann applanation). Materials and Methods: IOP was measured in 152 eyes of 76 dogs. A postmortem study was performed by comparing manometry and tonometry values and calculating the correlation coefficient (r2), in vivo real IOP (manometry) among the tonometers was compared, and an outpatient study was conducted with healthy eyes and eyes with signs of glaucoma and uveitis. Results: In the postmortem study, the values of r2 in descending order were Kowa (0.989), TonoVet Plus (0.984), TonoVet (0.981), and Tono-Pen Avia Vet (0.847). The IOP values in mmHg in the in vivo study were as follows: Aneroid manometer (16.8±2.5.7), TonoVet (18.1±2.9), TonoVet Plus (20.6±2.3), Tono-Pen Avia Vet (17.1±2.5), and Kowa (16.1±1.7); in outpatient clinics: TonoVet (16.8±3.8), TonoVet Plus (19.2±2.9), Tono-Pen Avia Vet (16.2±2.4), and Kowa (15.0±1.3); glaucoma: TonoVet (30.2±3.5), TonoVet Plus (35.0±6.1), Tono-Pen Avia Vet (29.5±4.2), and Kowa (23.9±5.0); and uveitis: TonoVet (14.2±1.4), TonoVet Plus (17.6±1.9), Tono-Pen Avia Vet (13.7±2.1), and Kowa (12.6±1.7). Conclusion: There was a strong correlation between IOP values and manometry in all the tonometers. The highest values were obtained with TonoVet Plus and the lowest with Kowa HA-2. All tonometers accurately measured IOP in dogs, including the latest TonoVet Plus, which showed an excellent correlation coefficient.

scholarly journals Intraocular pressure measurements with the Tono-Pen XL® and Perkins® applanation tonometers in horses and cattle

2013 ◽  
Vol 43 (5) ◽  
pp. 865-870 ◽  
Author(s):  
Silvia Franco Andrade ◽  
Rodrigo de Jesus Palozzi ◽  
Rodrigo Duarte Rolim ◽  
José Ricardo Cecílio Junqueira ◽  
Heloisa Ferreira do Valle ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Strong Correlation ◽  
Normal Values ◽  
Eye Drops ◽  
Pressure Measurements ◽  
Postmortem Study ◽  
Significant Difference ◽  
The Mean ◽  
Conscious Animals

The objective of this study was to compare the accuracy between two applanation tonometers, Tono-Pen XL® and Perkins®, in horses and cattle. The eyes of 20 horses and 20 cattle conscious and healthy were evaluated for the in vivo study and both eyes of 5 horses and 5 cattle were used as controls for the postmortem study. In conscious animals, the tonometry was performed with auriculopalpebral nerve block and then topical anesthesia for both tonometers and 1% fluorescein eye drops only for the Perkins tonometer. Readings of intraocular pressure (IOP) in the postmortem study were taken using manometry and tonometry by Tono-Pen XL® and Perkins®. The correlation coefficient (r²) between manometry and applanation tonometers Tono-Pen XL® and Perkins®, in horses, were 0.845 and 0.989, respectively, and in cattle, were 0.772 and 0.988, respectively. The mean IOP values in conscious horses with Tono-Pen XL® and Perkins® were 20.1±3.9mmHg and 20.9±3.2mmHg, respectively, and in conscious cattle, these values were 17.2±2.4mmHg and 17.9±1.4mmHg, respectively. There was a strong correlation between the IOP values obtained by direct ocular manometry and the Tono-Pen XL® and Perkins® tonometers in horses and cattle. There was no statistically significant difference between the mean IOPs obtained with both tonometers in conscious animals; however, there was a difference between the minimum values, which were on average 2-3 mmHg lower with the Tono-Pen XL® tonometer than with the Perkins® tonometer, which justifies a table of normal values differentiated for each tonometer.

scholarly journals Ex vivo and in vivo study of Kowa HA-2 applanation tonometer in the measurement of intraocular pressure in cats

2017 ◽  
Vol 38 (6) ◽  
pp. 3647
Author(s):  
Claudia Lizandra Ricci ◽  
Rogério Giuffrida ◽  
Glaucia Prada Kanashiro ◽  
Hilidia Stephania Rufino Belezzi ◽  
Carolina De Carvalho Bacarin ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Ex Vivo ◽  
Clinical Signs ◽  
In Vivo Study ◽  
Eye Drops ◽  
Significant Difference ◽  
Applanation Tonometer ◽  
Ex Vivo Study ◽  
Healthy Eyes

The objective of this study was to evaluate the use of the Kowa HA-2 applanation tonometer in measuring intraocular pressure (IOP) in cats. Ten healthy eyes were used in an ex vivo study in which the calibration curve for manometry vs. tonometry was determined by artificially raising the IOP in 5 mmHg increments up to 60 mmHg (10-60 mmHg). Both eyes of 10 anesthetized cats were studiedin vivo to compare manometry vs. tonometry. In the ambulatory study, 78 healthy eyes, 7 eyes with glaucoma and 20 eyes with uveitis were evaluated by tonometry, which was performed with topical anesthesia and 1% fluorescein eye drops for the formation of fluorescein semicircles. The correlation coefficient (r²) between the manometer and the Kowa HA-2 tonometer was 0.993 and the linear regression equation was y = 0.0915x + 0.0878 in the ex-vivo study. In the in vivo study, the IOP values (mean±SD, in mmHg) in manometry were 15.6 ± 1.1(14.0 – 17.5) and in tonometry were 15.5 ± 1.2(13.5 – 17.2), with no significant difference (P > 0.05) between manometry and tonometry. In ambulatory study, using the Kowa HA-2 tonometer, the IOP values (mean±SD, in mmHg) were 15.0 ± 1.5 (11.8 – 18.3) for the healthy eyes, 38.4 ± 8.1(29.6 – 53.7) for glaucomatous eyes and 10.4 ± 2.0(5.3 – 12.2) for eyes with uveitis. There was a strong correlation and accuracy between the IOP values with the manometry and the Kowa HA-2 tonometer. In the ambulatorystudy the IOP values obtained with the tonometer were compatible for animals with healthy eyes and with clinical signs of glaucoma and uveitis. We conclude that the Kowa HA-2 tonometer can be used in the measurement of IOP in cats, since it is a practical and accurate method in this species.

scholarly journals Estimation of the Corneal Young’s ModulusIn VivoBased on a Fluid-Filled Spherical-Shell Model with Scheimpflug Imaging

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Po-Jen Shih ◽  
Chun-Ju Huang ◽  
Tzu-Han Huang ◽  
Hung-Chou Lin ◽  
Jia-Yush Yen ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Corneal Thickness ◽  
The Other ◽  
University Hospital ◽  
Scheimpflug Imaging ◽  
Department Of Ophthalmology ◽  
Iop Measurement

Current intraocular pressure (IOP) measurement using air puff could be erroneous without applying proper corrections. Although noncontact tonometry is not considered to be accurate, it is still popularly used by eye clinics. It is thus necessary to extract the correct information from their results. This study proposes a practical approach to correctly measure IOPin vivo. By embedding a new model-based correction to the Corvis® ST, we can extract the corneal Young’s modulus from the patient data. This Young’s modulus can be used to correct the IOP readings. The tests were applied to 536 right eyes of 536 healthy subjects (228 male and 308 female) between March of 2012 and April of 2016. The tests were applied to patients at the Department of Ophthalmology, National Taiwan University Hospital and the Hung-Chuo Eye Clinics. The statistical analysis showed that the value for the Young’s modulus was independent of all the other parameters collected from the Corvis ST, including the corneal thickness and the intraocular pressure. Therefore, it is important to independently measure the Young’s modulus instead of depending on the correlation with the other parameters. This study adds the methodology of measuring corneal stiffnessin vivofor ophthalmologists’ reference in diagnosis.

scholarly journals Ex vivo and in vivo study of Kowa HA-2 applanation tonometer in the measurement of intraocular pressure in dogs

2016 ◽  
Vol 37 (2) ◽  
pp. 797
Author(s):  
Silvia Franco Andrade ◽  
Alexandre Lima de Andrade ◽  
Glaucia Prada Kanashiro ◽  
Danielle Alves Silva ◽  
Rafael Cabral Barbero ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Ex Vivo ◽  
In Vivo Study ◽  
Eye Drops ◽  
Significant Difference ◽  
Applanation Tonometer ◽  
Anesthetized Dogs ◽  
Ex Vivo Study ◽  
Healthy Eyes

The objective of this study was to evaluate the use of the Kowa HA-2 applanation tonometer in measuring intraocular pressure (IOP) in dogs. Twenty eyes were used in an ex vivo study in which the calibration curve for manometry vs. tonometry was determined by artificially raising the IOP in 5 mmHg increments up to 60 mmHg (10-60 mmHg). Both eyes of 10 anesthetized dogs were studied in vivo to compare manometry vs. tonometry. In the ambulatory study, 168 healthy eyes, 74 eyes with glaucoma and 60 eyes with uveitis were evaluated by tonometry, which was performed with topical anesthesia and 1% fluorescein eye drops for the formation of fluorescein semicircles. The ex vivo study showed an excellent correlation coefficient (r2= 0.993) between the aneroid manometer and the Kowa HA-2 tonometer. In the in vivo study, there was no significant difference (P>0.05) between the IOP values by manometry and tonometry, showing the excellent accuracy of the Kowa HA-2 tonometer. In the ambulatory study using the Kowa HA-2 tonometer, the IOP values (mean±SD, in mmHg) were 15.1±1.8 (12.0 – 20.0) for the healthy eyes, 25.2±4.0 (20.0 – 38.0) for glaucomatous eyes and 10.1±2.3 (5.0 – 13.7) for eyes with uveitis. There was a strong correlation between the IOP values obtained by direct ocular manometry and those from the Kowa HA-2 tonometer. In the ambulatory study, the IOP values measured by the tonometer were compatible for healthy eyes and for eyes with glaucoma or uveitis. We conclude that Kowa HA-2 applanation tonometer is accurate and practical for IOP measurement in dogs.

scholarly journals Correlation between visual and radiographic examinations of non-cavitated occlusal caries lesions: an in vivo study

2004 ◽  
Vol 18 (2) ◽  
pp. 145-149
Author(s):  
Victor Ferrás Wolwacz ◽  
Ana Chapper ◽  
Adair Luiz Stefanello Busato ◽  
Alcebíades Nunes Barbosa
Keyword(s):  
Correlation Coefficient ◽  
Clinical Examination ◽  
Strong Correlation ◽  
Scoring Systems ◽  
In Vivo Study ◽  
Occlusal Caries ◽  
Radiographic Diagnosis ◽  
Gamma Correlation ◽  
Caries Lesions

The aim of this study was to conduct an in vivo investigation of the correlation between the visual and radiographic scoring systems by Ekstrand et al.7 (1997) for the diagnosis of occlusal caries lesions. The study sample comprised 147 occlusal sites from 23 patients. Two trained and experienced examiners performed the clinical visual examinations. A third examiner, which was also trained, experienced and blind to the results of the visual clinical examination, performed the analysis of the bitewing radiographs. The correlation between visual and radiographic scores was assessed by Goodman & Kruskal's gamma correlation coefficient. Results showed a strong correlation between the scores for occlusal caries found in the visual and radiographic diagnosis systems used in this study.

scholarly journals Intraocular pressure and choroidal thickness postural changes in multiple system atrophy and Parkinson’s disease

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Maddalena De Bernardo ◽  
Giulio Salerno ◽  
Marco Gioia ◽  
Luigi Capasso ◽  
Maria Claudia Russillo ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Intraocular Pressure ◽  
Multiple System Atrophy ◽  
Choroidal Thickness ◽  
Corneal Thickness ◽  
Standing Position ◽  
Sitting Position ◽  
Postural Changes ◽  
Iop Measurement

AbstractTo evaluate intraocular pressure (IOP) and choroidal thickness (ChT) postural changes in multiple system atrophy (MSA), Parkinson’s disease (PD) patients and healthy controls (HC). 20 MSA patients, 21 PD patients and 14 HC, were examined. All subjects underwent a complete examination, including corneal thickness, ChT, IOP and axial length (AL) measurements. IOP measurement was performed in supine, sitting, and standing positions, whereas ChT in sitting and standing positions. Supine to standing IOP variations were significantly higher in MSA vs PD(p = 0.01) and in MSA vs HC (p < 0.0001), whereas no significant differences were observed between PD and HC (p = 0.397). Mean sub-foveal ChT in MSA was 240 ± 92 μm in sitting position, and 215 ± 94 μm in standing position with a significant reduction (p = 0.008). Mean sub-foveal ChT in PD was 258 ± 79 μm in sitting position, and 259 ± 76 μm in standing position (p = 0.887). In HC it was 244 ± 36 μm in sitting position, and 256 ± 37 μm in standing position with a significant increase (p = 0.007). The significant IOP and ChT postural changes can be considered additional hallmarks of autonomic dysfunction in MSA and further studies are needed to consider them as biomarkers in the differential diagnosis with PD.

Development of Novel Implantable Intraocular Pressure Sensors to Enhance the Performance in in vivo Tests

2015 ◽  
Vol 24 (6) ◽  
pp. 1896-1905 ◽  
Author(s):  
Kyeong-Sik Shin ◽  
Cheol-In Jang ◽  
Mi Jeung Kim ◽  
Kwang-Seok Yun ◽  
Ki Ho Park ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Pressure Sensors ◽  
Intraocular Pressure Sensors

Peran Faktor Pendorong Pada Keputusan Berkunjung Ke Kebun Raya Bogor

2021 ◽  
Vol 4 (1) ◽  
pp. 17
Author(s):  
Yuviani Kusumawardhani ◽  
Alma Alviana
Keyword(s):  
Correlation Coefficient ◽  
Significant Influence ◽  
Strong Correlation ◽  
Quantitative Research ◽  
Hypothesis Test ◽  
Botanical Garden ◽  
Coefficient Of Determination ◽  
Driving Factor ◽  
Motivating Factors ◽  
Botanical Gardens

<p>Bogor Botanical Garden is one of the icons of the Bogor City. Bogor Botanical Garden is a tourist site that has a forest concept but is located in the center of Bogor City so that access to Bogor Botanical Garden is easily accessible. Bogor Botanical Gardens is located in Ir. H. Juanda number 13, Bogor, West Java, Indonesia. This study was conducted to determine the effect of the Motivation Driving Factor on the Decision to Visit in Bogor Botanical Garden.</p><p>This research uses quantitative research, with descriptive methods. Many of the samples studied were 100 respondents who had visited Bogor Botanical Gardens.</p><p>Based on the results of the study it was concluded that from the results of the hypothesis test (T-Test) conducted by the researcher produced a tcount of 10.463&gt; Ttable 1.98447. This shows that there is a significant influence between the Motivating Factors for Visiting Decisions. The influence of motivating factors on the decision to visit Bogor Botanical Gardens with a strong correlation coefficient of 0.726 because it is between 0.600-0.799. The coefficient of determination or the percentage of influence of the Factors Driving Tourist Motivation (X) Decision to Visit (Y) is 52.8%. Meanwhile, the remaining 47.2% is influenced by other variables not examined in this research.</p>

CLINICAL, ECHOGRAPHIC, MORPHOLOGICAL AND IMMUNOLOGICAL CRITERIA FOR EVALUATING A WELL-FOUNDED SCAR ON THE UTERUS AFTER CESAREAN SECTION

2021 ◽  
Vol Special issue (1) ◽  
pp. 57-61
Author(s):  
Venera Kurbaniyazova ◽  
Keyword(s):  
Correlation Analysis ◽  
Cesarean Section ◽  
Correlation Coefficient ◽  
Significant Relationship ◽  
Strong Correlation ◽  
Type I Collagen ◽  
Morphological Features ◽  
Average Degree ◽  
Type I ◽  
Uterine Scar

The results of the conducted studies 102 of the manufacturer testify to the presence of essential clinical and echographic, immunological and morphological features of the "wealthy" or "insolvent" scar on the uterus after the cesarean section. The correlation analysis with the calculation of the Correlation coefficient of Gamma (G) indicates a statistically significant relationship between the average degree between the way of the delivery and the scar thickness (G = 0.55, p = 0.001), strong correlation between the ultrasound data (G = 0.74 , p = 0.002) and antibodies to type I collagen (G = 0.93, p = 0.003). Determining the level of antibodies to the type I collagen is the mostimportant criterion confirming the usefulness of the scar on the uterus.Keywords: cesarean section, uterine scar, pregnancy

Long-term intraocular pressure changes after femtosecond laser–assisted cataract surgery in healthy eyes and glaucomatous eyes

2019 ◽  
Vol 45 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Avni A. Shah ◽  
Jeanie Ling ◽  
Niraj R. Nathan ◽  
Ashton J. Kalhorn ◽  
Qingxia Chen ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Femtosecond Laser ◽  
Cataract Surgery ◽  
Pressure Changes ◽  
Healthy Eyes
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