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A hydrodissection cannula is a small surgical cannula used to inject fluid in a controlled way during eye surgery. It is commonly used in cataract surgery to separate the lens cortex and nucleus from the capsule. The cannula connects to a syringe filled with balanced salt solution or another approved fluid. It helps the surgeon create tissue planes without cutting them directly.
read more about hydrodissection cannula ...A hydrodissection cannula is mainly used during cataract surgery. It helps loosen the cataract lens material from the surrounding capsule so the lens can rotate and be removed more safely. It may also help separate tissue layers in other delicate ophthalmic procedures when fluid dissection is needed. The technique depends on cataract density, capsule condition, surgical approach, and surgeon judgment.
The cannula tip is placed near the lens capsule or desired tissue plane. The surgeon injects a small amount of fluid to create a wave that separates tissue layers. In cataract surgery, this fluid wave can help free the nucleus and cortex from the capsule. The surgeon watches the fluid movement and lens response carefully to avoid excessive pressure.
Hydrodissection cannulas may have angled, curved, flat, blunt, or specially shaped tips. Some are designed for cortical cleaving hydrodissection, while others support related maneuvers such as hydrodelineation. Single-use and reusable versions may be available depending on the manufacturer. The cannula size, angle, and tip design are selected for the incision and surgical technique.
Possible risks include capsular block, posterior capsule rupture, increased pressure in the eye, zonular stress, fluid misdirection, or damage to nearby eye structures. Forceful or poorly directed injection can increase risk. The device should be used with controlled fluid delivery and good visualization. Eye pain, sudden vision change, severe redness, or worsening symptoms after surgery should be reported promptly.
Yes. It is commonly used to inject fluid that helps separate cataract lens material from the capsule.
No. It uses fluid pressure to separate tissue planes rather than cutting with a blade.
Balanced salt solution or another approved ophthalmic fluid is commonly used, depending on the procedure and surgeon preference.
Yes. Excessive pressure, poor direction, or fragile capsule support can cause complications such as capsule rupture or pressure-related problems.
Hydrodissection. Boston University Department of Ophthalmology. https://www.bu.edu/eye/phacoprimer/hydrodissection/. Date Accessed June 18, 2026.
Safe phacoemulsification. European Society of Cataract and Refractive Surgeons. https://www.escrs.org/eurotimes/safe-phacoemulsification. Date Accessed June 18, 2026.
A novel minimal fluid technique for effective and safe lens hydrodissection during cataract surgery. BMC Ophthalmology (PMC). https://pmc.ncbi.nlm.nih.gov/articles/PMC6432847/. Date Accessed June 18, 2026.
Modified hydrodissection as a safe and effective treatment in cataract surgery. BMC Ophthalmology (PMC). https://pmc.ncbi.nlm.nih.gov/articles/PMC10230007/. Date Accessed June 18, 2026.
Capsular block syndrome: a case report and literature review. BMC Ophthalmology (PMC). https://pmc.ncbi.nlm.nih.gov/articles/PMC4140233/. Date Accessed June 18, 2026.