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Primary angle closure eye resection before closure of the angle of incidence and pathogenesis of the purposes of laser peripheral iris

Author: YangYuanZuo
Tutor: ZhaoJiaLiang
School: Peking Union Medical College , China
Course: Ophthalmology
Keywords: Primary angle closure Laser peripheral iridotomy Ultrasound biomicroscopy Ciliary processes anterior
CLC: R779.63
Type: Master's thesis
Year: 2008
Downloads: 18
Quote: 0
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Abstract


Objective: To understand the primary angle closure (primary angle closure, PAC) eye purposes of prophylactic laser peripheral iris incidence angle closure after resection (laser peripheral iridotomy, LPI), and PAC eye by comparing the purposes LPI after before closure of the angle between the lesser of heavier PAC eyes with normal anterior chamber depth eye between the anterior chamber and anterior chamber angle structure parameters, possible mechanisms of PAC eye purposes LPI angle closure . Subjects and Methods: (1) prospective interventional case series. PAC 39 from Beijing Union Medical College Hospital eye clinic patients the purposes of LPI, and compare the two weeks before and after surgery darkroom ultrasound intravital microscopy (ultrasound biomicroscopy, UBM) image obtained anterior chamber and anterior chamber angle parameters, including range of central anterior chamber depth (anterior chamber depth, ACD), anterior chamber angle adhesion Close (iridotrabecularcontact, ITC), anterior chamber angle opening distance (angle opening distance, AOD), trabecular meshwork - ciliary process distance (trabecular- ciliary process distance, TCPD), peripheral part of the iris the thickness (irisdistance, ID), iris - ciliary processes contact (iris-ciliary process contact, ICPC), the incidence of scleral - ciliary process distance (the sclera spur in-ciliary process distance , SSCPD), trabecular meshwork - ciliary process angle (trabecular-ciliary process angle TCPA). (2) the application of case-control studies. The 39 PAC eye, according to the severity of LPI anterior chamber angle off severe group (number of clock hours of angle closure> 3 hour, 23) and the mild group (anterior chamber angle off the number of clock hours ≤ 3 hourly bit, 16). PAC eye LPI angle closure mild group and severe group and the normal anterior chamber depth (20) between the three groups UBM anterior chamber and anterior chamber angle parameters including ACD, ID, TCPD, TCPA and SSCPD. Results: (1) 79.49% (31/39) of the PAC eye LPI anterior chamber angle after the broadening of varying degrees. 87.18% (34/39) of the PAC eye UBM examination after darkroom LPI ≥ 1 hour bit still attached to the anterior chamber angle is closed. (2) in the group of normal anterior chamber depth, PAC eye LPI anterior chamber angle close comparison between the mild group and severe group, TCPD and the TCPA showed a decreasing trend in the difference between the groups was statistically significant (P <0.0001); ACD was significantly greater than in the normal anterior chamber depth group the two groups PAC eyes (P <0.0001), but the difference was not statistically significant (P = .7170) between the two groups PAC eye; the ID and SSCPD differences among the three groups was not statistically significance (P> 0.05). PAC eye LPI anterior chamber angle Close hourly median TCPD and TCPA correlation coefficients were -0.4312 (P = 0.0069) and -0.3958 (P = 0.0126). Conclusion: angle closure PAC eye LPI high incidence. The ciliary process before the bit is to lead the anterior chamber angle PAC eye LPI is closed.

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CLC: > Medicine, health > Ophthalmology > Eye surgery and surgery > Retinal photocoagulation and laser eye surgery
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