VetOnIt clinical notes
Subpalpebral lavage lines in horses: when and why
When a subpalpebral lavage (SPL) system helps in equine eye cases, and the placement safety steps covered in Vet On It's Introduction to Equine Ophthalmology course.
Updated · VetOnIt
When an SPL is indicated
A subpalpebral lavage system is useful when a horse needs frequent topical treatment, when liquid formulations are preferred, and for complicated corneal ulcers, stromal abscesses, and fragile or painful eyes. It can also help some horses with chronic uveitis that is refractory to treatment. [1]
Having an owner apply ointment directly to a compromised eye risks rupture. With an SPL in place, owners give liquid medication at the end of the tubing, chased by air, so it reaches the cornea. [1]
Placement safety
Before placing the trocar, test the horse's tolerance with a gloved finger deep under the eyelid. If the horse reacts, more sedation is needed before the trocar goes near the eye. [1]
In addition to the sensory nerve blocks for the eyelid, a local block where the SPL will exit the skin is worthwhile. [1]
Related lectures
References
- Introduction to Equine Ophthalmology (lecture recording, May 8 2026) VetOnIt lecture transcriptLecture source retained by VetOnIt.