TY - JOUR AU - Ngamrojanavanit, Napasorn AU - Tanthasathien, Natthaporn AU - Srisamai, Nirachon AU - Taotongnuntasin, Suchaya AU - Phoomvuthisarn, Panrawee AU - Tuntivanich, Nalinee PY - 2019/11/27 Y2 - 2024/03/29 TI - The use of B-scan coupling with A-scan ultrasonography to characterize ocular biometry in canine absolute glaucoma JF - The Thai Journal of Veterinary Medicine JA - TJVM VL - 49 IS - 3 SE - Original Articles DO - UR - https://he01.tci-thaijo.org/index.php/tjvm/article/view/230643 SP - 273-281 AB - <p><span class="fontstyle0">This study was to investigate intraocular structures of canine absolute glaucomatous eyes using real time B-scan<br>ultrasonography in accordance with the amplitude mode. Ten normal eyes and twenty absolute glaucomatous eyes<br>were included in this study. Ocular biometry via closed-eye technique was performed using the Ultrascan</span><span class="fontstyle0">® </span><span class="fontstyle0">Imaging<br>System </span><span class="fontstyle2">(</span><span class="fontstyle0">Alcon Surgical Laboratory, Fort Worth, USA</span><span class="fontstyle2">)</span><span class="fontstyle0">, with a 10 MHz mechanical sector probe</span><span class="fontstyle2">. </span><span class="fontstyle0">Changes of intraocular<br>structures were descriptively analyzed. Ocular biometry was measured, statistically analyzed and compared between<br>both groups. While mean lens thickness was comparable between normotensive and glaucomatous eyes, mean lens<br>equatorial length was higher in the latter group. Increased hyperechogenicity of lens was ultrasonographically<br>observed in dogs with absolute glaucoma. Axial globe length was significantly greater in the experimental group than<br>the control group (</span><span class="fontstyle3">P&lt;0.05</span><span class="fontstyle0">). In relation to the appearance of the cone-shaped posterior wall, positive correlation between<br>intraocular pressure and axial globe length with statistical significance was noted (r=0.5, </span><span class="fontstyle3">P&lt;0.05</span><span class="fontstyle0">). Retinal detachment<br>and lens displacement were also observed in absolute glaucomatous eyes. Not only does ultrasonography, with the 10<br>MHz frequency transducer, provides ocular biometry to specifically investigate changes of lens and the posterior<br>segment of the canine absolute glaucomatous eyes, it can lead to further selection of appropriate treatment and<br>awareness of post-treatment complications.</span> </p> ER -