Department of Glaucoma, Anand Eye Institute, Hyderabad, Telangana, India.
Indian J Ophthalmol. 2023 Nov;71(11):3578. doi: 10.4103/IJO.IJO_895_23.
The Ahmed Glaucoma Valve (AGV, New World Medical Inc., Rancho Cucamonga, CA, USA) is a glaucoma drainage device commonly used in the treatment of refractory glaucoma either as a primary surgical procedure or after the failure of conventional filtration procedures. During surgery, After the AGV plate is fixed to the sclera, at least 8 mm posterior to the corneoscleral limbus, the length of tube is trimmed to the desired length, based on decision to insert it in the anterior chamber (AC) or ciliary sulcus.
This video describes that the length of AGV silicone tube should be cut based on decision to place it in the AC or ciliary sulcus. The tube should not be cut too long or short as in either case it may cause postoperative complications.
The video illustrates useful tips for AGV tube insertion into the AC, taking care that it does not cross pupillary margin and is of adequate length. The silicone AGV tube is cut using Westcott scissors to permit a length of 2- to 3-mm tube insertion in the AC, with its bevel facing up, and the tip is cut to an angle of 30°, to facilitate AC entering. In ciliary sulcus placement of the AGV tube, the tunnel is made longer when compared with the AC implantation, and the length of tube should be kept long enough for the tip to be just visible beyond the pupillary border.
This video highlights the importance of customization of the AGV tube length for individual patients based on its placement into AC or ciliary sulcus.
Ahmed 青光眼引流阀（AGV，美国加利福尼亚州兰乔库卡蒙加的 New World Medical Inc. 公司制造）是一种常用于治疗难治性青光眼的青光眼引流装置，既可作为主要手术程序，也可在常规滤过手术失败后使用。在手术过程中，AGV 板固定在巩膜上后，至少在角巩膜缘后 8mm 处，根据将其插入前房（AC）或睫状体沟的决定，修剪管的长度至所需长度。
本视频介绍了根据将 AGV 硅胶管放置在 AC 或睫状体沟的决定来切割管的长度。管不应切割过长或过短，因为在任何一种情况下，都可能导致术后并发症。
该视频说明了将 AGV 管插入 AC 的有用技巧，注意不要使其越过瞳孔边缘且长度足够。使用 Westcott 剪刀切割硅胶 AGV 管，以便在 AC 中插入 2-3mm 的管，斜面朝上，尖端切成 30°角，以方便进入 AC。在睫状体沟放置 AGV 管时，与 AC 植入相比，隧道更长，并且管的长度应保持足够长，以便尖端刚好在瞳孔边缘之外可见。
本视频强调了根据 AGV 管放置在 AC 或睫状体沟的位置，为每位患者定制管长度的重要性。
