Deep Sclerectomy vs Xen in Solo Procedure

Glaucoma Clinical Trial

— SPXen  

Official title:

Deep Sclerectomy vs Xen in Solo Procedure: Comparative Study, Efficacy and Safety Profile

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT05201378
• Other study ID #: SPXen
• Status: Completed
• Start date: July 15, 2021
• Est. completion date: October 6, 2022

Study information

• Verified date: April 2023
• Source: Groupe Hospitalier Paris Saint Joseph
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

Glaucoma is the leading cause of irreversible blindness in the world and the second leading cause of blindness after cataract after the age of 50. Lowering intraocular pressure (IOP) is the only treatment option to prevent visual field degradation. While medical treatment and selective laser trabeculoplasty are considered first-line options in open-angle glaucoma, the surgical option is considered in patients who have uncontrolled IOP under maximal tolerated medical treatment. In this situation, trabeculectomy or deep nonperforating sclerectomy may be performed. Although it is uncertain whether SPNP is superior to trabeculectomy, which is considered the gold standard of surgery, SPNP is a procedure that offers a better quality of life and fewer intra- and postoperative complications. SPNP was first described by Zimmerman. It consists in peeling off the internal wall of Schlemm's canal and the juxta-canalicular trabeculum which represent the main resistances to the evacuation of the aqueous humor. The trabecular meshwork is left intact and acts as a filter membrane between the subconjunctival space and the anterior chamber. The addition of mitomycin (MMC) is necessary because it is associated with better IOP control and greater surgical success. Although postoperative procedures such as needling or Nd:YAG laser-assisted gonioponctures are often required, SPNP offers good long-term results in patients who are naïve to any filtering surgery.

Minimally invasive surgery has been used more and more over the last 10 years. It aims to reduce surgical complications in comparison to classical filtering procedures while respecting the eye's own anatomy. Several devices have been invented to increase aqueous humor elimination. They can be implanted ab-interno or ab-externo and can be implanted in the suprachoroidal space, in Schlemm's canal or in the subconjunctival space. The XEN gelstent (Allergan, Dublin, Ireland) is placed ab-interno between the subconjunctival space and the anterior chamber, either in combination with cataract surgery or as a solo procedure.

The aim of the study is to compare the surgical success of these 2 techniques. No study has ever compared these 2 surgeries in solo procedure. A recent retrospective trial compared them in combined procedures without showing significant differences in IOP reduction. Nevertheless, the short follow-up period of 9 months may have been insufficient to show a real difference.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 282
• Est. completion date: October 6, 2022
• Est. primary completion date: September 28, 2021
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Patient whose age = 18 years

• Patient with primary or secondary open angle glaucoma

• Patient who has undergone a SPNP or XEN procedure in solo

• French speaking patient

Exclusion Criteria:

• Angle closure

• Less than 6 months follow-up

• History of eye filtering surgery included

• Patient under guardianship or curatorship

• Patient deprived of liberty

• Patient under court protection

• Patient objecting to the use of his/her data for this research

Related Conditions & MeSH terms

• Glaucoma

Locations

Country	Name	City	State
France	Groupe Hospitalier Paris Saint-Joseph	Paris

Sponsors (1)

Lead Sponsor	Collaborator
Groupe Hospitalier Paris Saint Joseph

Country where clinical trial is conducted

France, 

References & Publications (5)

Eldaly MA, Bunce C, Elsheikha OZ, Wormald R. Non-penetrating filtration surgery versus trabeculectomy for open-angle glaucoma. Cochrane Database Syst Rev. 2014 Feb 15;(2):CD007059. doi: 10.1002/14651858.CD007059.pub2. — View Citation

Gazzard G, Konstantakopoulou E, Garway-Heath D, Garg A, Vickerstaff V, Hunter R, Ambler G, Bunce C, Wormald R, Nathwani N, Barton K, Rubin G, Buszewicz M; LiGHT Trial Study Group. Selective laser trabeculoplasty versus eye drops for first-line treatment of ocular hypertension and glaucoma (LiGHT): a multicentre randomised controlled trial. Lancet. 2019 Apr 13;393(10180):1505-1516. doi: 10.1016/S0140-6736(18)32213-X. Epub 2019 Mar 9. Erratum In: Lancet. 2019 Jul 6;394(10192):e1. — View Citation

GBD 2019 Blindness and Vision Impairment Collaborators; Vision Loss Expert Group of the Global Burden of Disease Study. Causes of blindness and vision impairment in 2020 and trends over 30 years, and prevalence of avoidable blindness in relation to VISION 2020: the Right to Sight: an analysis for the Global Burden of Disease Study. Lancet Glob Health. 2021 Feb;9(2):e144-e160. doi: 10.1016/S2214-109X(20)30489-7. Epub 2020 Dec 1. Erratum In: Lancet Glob Health. 2021 Apr;9(4):e408. — View Citation

Rulli E, Biagioli E, Riva I, Gambirasio G, De Simone I, Floriani I, Quaranta L. Efficacy and safety of trabeculectomy vs nonpenetrating surgical procedures: a systematic review and meta-analysis. JAMA Ophthalmol. 2013 Dec;131(12):1573-82. doi: 10.1001/jamaophthalmol.2013.5059. — View Citation

Touboul A, Fels A, Morin A, Bensmail D, Lachkar Y. One-Year Outcomes of Standalone XEN Gel Stent Versus Nonpenetrating Deep Sclerectomy. J Glaucoma. 2022 Dec 1;31(12):955-965. doi: 10.1097/IJG.0000000000002108. Epub 2022 Aug 22. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Rate of surgical success at last visit in both groups	This outcome corresponds to intraocular pressure assessed at last visit, an average of 6 months.	through study completion, an average of 6 months
Secondary	Intra- and postoperative complications	This outcome corresponds to the complications rate through study completion.	through study completion, an average of 6 months
Secondary	number of antiglaucoma medications	This outcome corresponds to the number of antiglaucoma medications at through study completion.	through study completion, an average of 6 months