Khng Christopher, Packer Mark, Fine I Howard, Hoffman Richard S, Moreira Fernando B
From the Oregon Eye Institute, Eugene, Oregon.
J Cataract Refract Surg. 2006 Feb;32(2):301-8. doi: 10.1016/j.jcrs.2005.08.062.
To assess changes in intraocular pressure (IOP) during standard coaxial or bimanual microincision phacoemulsification.
Oregon Eye Center, Eugene, Oregon, USA.
Bimanual microincision phacoemulsification (microphaco) was performed in 3 cadaver eyes, and standard coaxial phacoemulsification was performed in 1 cadaver eye. A pressure transducer placed in the vitreous cavity recorded IOP at 100 readings per second. The phacoemulsification procedure was broken down into 8 stages, and mean IOP was calculated across each stage. Intraocular pressure was measured during bimanual microphaco through 2 different incision sizes and with and without the Cruise Control (Staar Surgical) connected to the aspiration line.
Intraocular pressure exceeded 60 mm Hg (retinal perfusion pressure) during both standard coaxial and bimanual microphaco procedures. The highest IOP occurred during hydrodissection, ophthalmic viscosurgical device injection, and intraocular lens insertion. For the 8 stages of the phacoemulsification procedure delineated in this study, IOP was lower for at least 1 of the bimanual microphaco eyes compared with the standard coaxial phaco eye in 4 of the stages (hydro steps, nuclear disassembly, irritation/aspiration, anterior chamber reformation).
There was no consistent difference in IOP between the bimanual microphaco eyes and the eye that had standard coaxial phacoemulsification. Bimanual microincision phacoemulsification appears to be as safe as standard small incision phacoemulsification with regard to IOP.
评估标准同轴或双手微切口超声乳化白内障吸除术中眼压（IOP）的变化。
美国俄勒冈州尤金市的俄勒冈眼中心。
对3只尸体眼进行双手微切口超声乳化白内障吸除术（微超乳），对1只尸体眼进行标准同轴超声乳化白内障吸除术。置于玻璃体腔的压力传感器以每秒100次读数记录眼压。超声乳化手术过程分为8个阶段，并计算每个阶段的平均眼压。在双手微切口超声乳化白内障吸除术中，通过2种不同的切口大小，以及在连接与未连接巡航控制装置（STAAR Surgical公司）至抽吸管路的情况下测量眼压。
在标准同轴和双手微切口超声乳化手术过程中，眼压均超过60 mmHg（视网膜灌注压）。最高眼压出现在水分离、眼用粘弹剂注入和人工晶状体植入期间。对于本研究中所描述的超声乳化手术的8个阶段，在其中4个阶段（水分离步骤、核分解、刺激/抽吸、前房重建），双手微切口超声乳化白内障吸除术的至少1只眼的眼压低于标准同轴超声乳化白内障吸除术的眼。
双手微切口超声乳化白内障吸除术的眼与进行标准同轴超声乳化白内障吸除术的眼在眼压方面没有一致的差异。就眼压而言，双手微切口超声乳化白内障吸除术似乎与标准小切口超声乳化白内障吸除术一样安全。
