Clinical Scorecard: Lower IOP in Cataract Surgery

At a Glance

Key Highlights

• Lower infusion pressures (as low as 28 mmHg) maintain chamber stability and reduce intraoperative ocular tissue stress compared to traditional high IOP (65-85 mmHg).
• Lower IOP during surgery is associated with less corneal endothelial impact, reduced postoperative anterior chamber inflammation, and improved patient comfort.
• Transitioning to lower infusion pressures can be done incrementally without compromising surgical efficiency or requiring changes in vacuum or aspiration flow rates.

Guideline-Based Recommendations

Diagnosis

• Assess baseline patient anatomy and ocular physiology to individualize intraoperative IOP targets.

Management

• Utilize advanced phacoemulsification platforms with active fluidics to maintain set, lower IOP during surgery.
• Reduce infusion pressures incrementally (e.g., by 5 mmHg steps) to improve surgeon comfort and patient outcomes.
• Maintain vacuum and aspiration flow rates while lowering infusion pressure to preserve surgical efficiency.

Monitoring & Follow-up

• Monitor intraoperative chamber stability and pupil behavior to ensure adequate surgical conditions at lower IOP.
• Observe postoperative IOP at day 1, day 7, and 1 month to confirm no adverse pressure changes related to infusion pressure settings.

Risks

• Potential unknown long-term effects on optic nerve and retinal perfusion require further study, especially in glaucoma patients.
• Possible altered intraoperative blood reflux during combined MIGS procedures at lower infusion pressures; further research needed.

Patient & Prescribing Data

Patients undergoing cataract surgery, including those with combined minimally invasive glaucoma surgery (MIGS).

Lower infusion pressures during surgery improve patient comfort and reduce early postoperative inflammation without affecting postoperative IOP control.

Clinical Best Practices

• Adopt advanced fluidic systems capable of maintaining set IOP to optimize surgical conditions.
• Implement gradual reductions in infusion pressure to allow surgeon adaptation and maintain safety.
• Consider patient-specific factors such as anatomy and comorbidities when selecting intraoperative IOP targets.
• Continue research and monitoring for long-term outcomes, especially in glaucoma patients and combined procedures.

References

• Osher RH. Slow motion phacoemulsification approach. J Cataract Refract Surg. 1993
• Rauen MP et al. Phacoemulsification using an active fluidics system at physiologic vs high intraocular pressure. J Cataract Refract Surg. 2024
• Suzuki H et al. Effect of a new phacoemulsification and aspiration handpiece on anterior chamber stability. J Cataract Refract Surg. 2023
• Scarfone HA, Rodriguez EC. Evaluation of early changes of the anterior vitreous interf