Related Experiment Video
Updated: May 23, 2025
Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
Published on: October 14, 2022
Risk factors and protective strategies for hypotony following preserflo microshunt implantation
Hiroki Mieno1, Kazuhiko Mori2,3, Kengo Yoshii4
1Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Abstract:
The PreserFlo MicroShunt (PMS) is a minimally invasive surgical device for glaucoma management. However, postoperative hypotony remains a significant complication. This retrospective cohort study analyzed 471 eyes to evaluate the efficacy of PMS implantation in reducing intraocular pressure (IOP) and medication dependency, as well as to identify risk factors associated with hypotony. The median IOP decreased significantly from 19 mmHg preoperatively to 10 mmHg three months postoperatively, with the median medications score dropping to zero. Postoperative hypotony occurred in 18.7% of the cases. Multivariate analysis identified preoperative IOP ≥ 25 mmHg (odds ratio (OR): 2.01, 95% confidence interval (CI): 1.00-4.02, p = 0.049) and medication scores ≥ 5 (OR: 2.12, 95% CI: 1.13-3.96, p = 0.019) as significant risk factors for hypotony, while axial length ≥ 25.5 mm (OR: 0.19, 95% CI: 0.09-0.39, p < 0.001) and intraluminal suture stenting (OR: 0.08, 95% CI: 0.03-0.25, p < 0.001) were significantly protective. Importantly, intraluminal suture stenting mitigated the risk of hypotony without compromising the short-term surgical outcomes. These findings emphasize the need for careful patient selection and the potential of intraluminal suture stenting as an effective intraoperative strategy to improve the safety and outcomes of PMS implantation.
Insights
The PreserFlo MicroShunt effectively lowers eye pressure and medication needs in glaucoma patients. However, high preoperative pressure and medication scores increase hypotony risk, which intraluminal suture stenting can mitigate.
Area of Science:
- Ophthalmology
- Surgical Devices
- Glaucoma Management
Background:
- Postoperative hypotony is a significant complication of PreserFlo MicroShunt (PMS) implantation.
- Effective glaucoma management requires reducing intraocular pressure (IOP) and medication dependency.
Purpose of the Study:
- To evaluate the efficacy of PMS implantation in reducing IOP and medication dependency.
- To identify risk factors associated with postoperative hypotony after PMS implantation.
- To assess the protective role of intraluminal suture stenting.
Main Methods:
- Retrospective cohort study of 471 eyes.
- Analysis of preoperative and postoperative IOP and medication scores.
- Multivariate analysis to identify risk factors and protective elements.
Main Results:
- Median IOP decreased from 19 mmHg to 10 mmHg three months postoperatively.
- Median medication score dropped to zero.
- Postoperative hypotony occurred in 18.7% of cases.
- High preoperative IOP (≥25 mmHg) and medication scores (≥5) were risk factors for hypotony.
- Longer axial length (≥25.5 mm) and intraluminal suture stenting were protective against hypotony.
Conclusions:
- PMS implantation is effective in reducing IOP and medication dependency.
- Intraluminal suture stenting is a promising strategy to mitigate hypotony risk without compromising short-term outcomes.
- Careful patient selection and intraoperative techniques like suture stenting can improve PMS safety and efficacy.
Related Concept Videos
01:25Glaucoma: Overview
01:28Angle Closure Glaucoma: Treatment
01:27Open Angle Glaucoma: Treatment
Drugs such as carbonic anhydrase inhibitors, α2- and...