Indications
Trypan Blue is indicated for use as an aid in ophthalmic surgery by staining the anterior capsule of the lens.
Pharmacology
Trypan Blue is a selective tissue staining agent (dye) which stains anterior lens capsule of the human crystalline lens. The dye does not penetrate the capsule, permitting visualization of the anterior capsule in contrast to the non-stained lens cortex and inner lens material.
Dosage And Administration
The first step to administer Trypan Blue is to inject an air bubble into the anterior chamber using a 26 gauge needle. It prevents dilution of dye by the aqueous humor. Then Trypan Blue is injected into the anterior lens capsule using a tuberculin syringe. Sufficient staining is achieved as soon as the dye has contracted the capsule. If some area is left unstained, inject one more drop till it gets stained.
Contraindications
Trypan Blue is contraindicated when a non-hydrated (dry state), hydrophilic acrylic intraocular lens (IOL) is planned to be inserted into the eye because the dye may be absorbed by the IOL and stain the IOL.
Side Effects
- Discoloration of high water content hydrogen intraocular lenses.
- Inadvertent staining of the posterior lens capsule and vitreous face.
- It is generally self limited, lasting up to one week.
Pregnancy And Lactation
Pregnancy Category C. There are no adequate and well-controlled studies in pregnant women. Trypan Blue should be given to a pregnant woman only if the potential benefit justifies the potential risk to the fetus.
Lactation: It is not known whether this drug is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when Trypan Blue is administered to a nursing woman.
Precautions And Warnings
It is recommended that after injection all excess Trypan Blue should be immediately removed from the eye by thorough irrigation of the anterior chamber.
Therapeutic Class
Preparations for Ophthalmic diagnosis.
Use in special populations
Pediatric use: The safety and effectiveness of Trypan Blue have been established in pediatric patients. Use of Trypan Blue is supported by evidence from an adequate and well controlled study in pediatric patients.
Geriatric use: No overall differences in safety and effectiveness have been observed between elderly and younger patients.
Storage Conditions
Store below 30° C and keep away from lig.