白内障青光眼手术策略

Question

白内障合并急性闭角型青光眼手术策略

Accepted Answer

对于白内障合并急性闭角型青光眼（APACG），首选的治疗策略是**在控制眼压、角膜透明后，早期行白内障超声乳化吸除联合房角分离术**。根据检索到的国内外最新指南与共识，其核心治疗原则是：急性发作期首先通过药物控制眼压，待角膜水肿消退后，尽快进行白内障摘除以解除瞳孔阻滞、加深前房、开放房角，并同期行房角分离术以恢复房水流出通道。 --- ## 临床证据与治疗路径 ### 1. 急性发作期的紧急处理首要目标是迅速降低眼压、缓解症状，为后续手术创造条件。 **根据检索到的流程图，急性闭角型青光眼的紧急处理遵循以下标准化路径：** ![image_category: FLOWCHART/Clinical Management Algorithm | body_region: head | specialty: Ophthalmology | summary: A clinical flowchart detailing the emergency management protocol for acute angle-closure glaucoma, from initial medication to laser intervention. | detail: This image displays a structured clinical flowchart for the management of acute angle-closure glaucoma. The visual design utilizes nine sequential light-blue rectangular blocks connected by downward arrows, indicating a step-by-step progression of care. The protocol begins with supportive measures like analgesia and anti-emesis, followed by diagnostic confirmation to exclude secondary or lenticular causes. A critical 'Stat medication' section lists specific pharmacological interventions: topical Dorzolamide 2%/Timolol 0.5%, Apraclonidine 0.5%, and Pilocarpine 2% (deferred if IOP > 40 mmHg), plus IV Acetazolamide 250mg for high pressure. Clinical significance is placed on a 30-60 minute review window. If the cornea is clear, the primary surgical intervention is laser peripheral iridotomy (LPI) in both eyes, followed by a high-frequency steroid regimen (Dexamethasone 0.1% or Prednisolone 1%). For refractory cases or those with corneal oedema preventing LPI, the chart suggests laser peripheral iridoplasty or diode laser cycloablation within 2 hours. The final stage addresses secondary causes like uveal effusions or neovascular issues, noting that Atropine 1% should replace Pilocarpine in lenticular-related cases. This algorithm provides a standardized approach to rapidly reducing intraocular pressure and preventing permanent optic神经损伤。](https://img.medsci.cn/knowledge_base/1d7ac1c00131a1a5/_p_21_f_1.jpeg) *图：急性闭角型青光眼紧急处理流程图，展示了从药物治疗到激光干预的标准化步骤。* **另一流程图进一步明确了治疗的核心目标与步骤：** ![image_category: FLOWCHART/Clinical management algorithm | body_region: head | specialty: Ophthalmology | summary: A clinical flowchart outlining the systematic management of an acute primary angle closure attack, focusing on IOP reduction and elimination of pupillary block. | detail: This clinical flowchart, titled 'Management of acute primary angle closure attack' and credited to the European Glaucoma Society, provides a structured protocol for treating ophthalmic emergencies involving sudden spikes in intraocular pressure (IOP). The primary clinical priorities are to lower the IOP and break the attack immediately to prevent permanent vision loss. The algorithm suggests globe decompression via clear cornea paracentesis at the slit lamp as an initial, albeit high-risk, step. The core medical treatment strategy involves a three-pronged approach: decreasing aqueous humor (AH) production through topical beta-blockers or alpha-2 agonists and systemic administration of acetazolamide or mannitol; re-opening the drainage angle using topical 2% pilocarpine; and managing secondary inflammation with topical steroids. Once the acute phase is managed, the focus shifts to laser or surgical procedures to eliminate pupillary block, with laser iridotomy cited as the preferred first-line option. The flowchart further differentiates iris procedures based on corneal clarity: if the cornea remains persistently cloudy despite topical 10% glycerin, surgical iridectomy, iridoplasty, or cyclophotocoagulation are recommended. If the cornea is clear, laser peripheral iridotomy (LPI) or surgical iridectomy is performed. Finally, the guide highlights the importance of prophylactic iridotomy in the fellow eye if it is phakic, as it remains at high risk for a similar attack.](https://img.medsci.cn/knowledge_base/6afba1c0036e791e/_p_147_f_6.jpeg) *图：欧洲青光眼学会（EGS）的急性原发性闭角型青光眼发作管理流程图，强调降低眼压、消除瞳孔阻滞。* **具体药物治疗方案如下[2][6]：** - **一线治疗**：立即给予全身性乙酰唑胺（Acetazolamide）、局部毛果芸香碱（Pilocarpine）及其他降眼压药物。 - **辅助治疗**：局部使用类固醇、口服镇痛药和止吐药（按需）。 - **毛果芸香碱使用注意**：当眼压 > 40 mmHg 时，应暂缓使用，因其可能加重前房拥挤[1]。 ### 2. 确定性手术治疗策略一旦眼压得到控制、角膜恢复透明，应尽快进行确定性手术。 **首选方案：白内障超声乳化吸除联合房角分离术** - **证据与推荐**：根据《中国青光眼指南（2020年）》，对于合并白内障的PACG，**首选白内障摘除联合人工晶状体植入术，同时在房角镜下行房角分离术**[7]。浙江省专家共识（2024年）同样推荐该术式作为PACG急性发作合并白内障时的**首选治疗**，其能显著降低眼压（33%~73%），减少降眼压药物使用（55%~83%），手术成功率约90%，并发症少[2]。 - **手术时机**：2022年RCO指南建议，在眼压控制、角膜透明后约**1至4周**内进行早期白内障超声乳化手术[6]。 - **手术顺序**：绝大多数专家（97.7%）选择**先进行白内障超声乳化吸除及人工晶状体植入术，再行房角分离术**。因为超声乳化本身可以加深前房，为房角分离创造更好条件[3]。 **替代方案：小梁切除术** - **适用情况**：当角膜水肿严重，影响白内障手术安全时，在充分评估风险后，可选择小梁切除术（可联合丝裂霉素C）[2]。 - **疗效与风险**：手术成功率约为56%~93%，但发生严重并发症的概率高达17%[2]。 ### 3. 手术决策的关键考量因素对于白内障与青光眼共存的情况，应采取个体化策略，主要考量以下因素[1][4][8]： | 考量因素 | 倾向于白内障手术优先 | 倾向于青光眼滤过手术优先 | 倾向于联合手术 | | :--- | :--- | :--- | :--- | | **疾病严重程度** | 早期青光眼，眼压药物控制良好 | 晚期青光眼，最大药物治疗下眼压仍失控 | 早-中期青光眼，药物控制不佳 | | **白内障情况** | 显著白内障，影响青光眼评估或视力 | 早期白内障 | 显著白内障 | | **其他因素** | 瞳孔阻滞和/或房角关闭机制为主 | 滤过手术预后差（如假性囊膜剥脱） | 患者依从性差、经济原因无法承受两次手术 | **关于联合手术与分期手术的选择**： - **联合手术**（如Phaco-Trab）可实现一次手术解决两个问题，视觉康复更快，但手术时间更长，并发症风险可能增加，且滤过泡成功率可能低于单独滤过手术[1][8]。 - **分期手术**（先白内障，后评估是否需要青光眼手术）是许多专家的偏好，尤其当临床条件允许时，应考虑先行白内障手术[1][4]。对于更严重的青光眼或术前高眼压病例，滤过手术（如小梁切除术）是首选[1]。 ### 4. 对侧眼的处理所有原发性急性房角关闭患者，无论发作眼如何处理，都应对**对侧眼**进行预防性激光周边虹膜切开术（LPI），或考虑早期行白内障摘除术，除非该眼已接受过白内障或青光眼手术[5]。 --- ## 进一步诊断建议（参考）为了制定更精确的手术方案，如果条件允许，请考虑提供以下信息： * **房角镜检查结果**：明确房角粘连的范围和程度，是决定是否联合房角分离术以及评估预后的关键。 * **视神经与视野评估**：青光眼损害的严重程度（早期、中期、晚期）是选择单纯白内障手术还是必须联合滤过手术的核心依据。 * **角膜内皮细胞计数**：评估角膜对手术（尤其是可能联合的房角分离或滤过手术）的耐受性。 --- *本分析基于检索到的临床指南与专家共识，旨在为临床决策提供参考。所有治疗均需结合患者具体情况进行个体化评估，并由执业医师最终确定。*