A 5" Castroviejo needle holder with a lock is a precision surgical instrument used for delicate suturing in microsurgery, particularly in ophthalmology. It holds fine needles securely with its locking mechanism, allowing surgeons to perform precise, repetitive motions with minimal trauma to surrounding tissues, and it can be used for backhand suturing in confined spaces.

Microsurgery:

Used for extremely delicate suturing in specialized procedures.

Ophthalmic surgery:

Most commonly used in eye surgery due to the need for precision with very small needles and sutures.

Delicate tissue suturing:

The fine tips and locking mechanism ensure a secure grip on fine needles (calibers 5-0 to 8-0) without damaging fragile tissues.

Constrained spaces:

The 5" length and straight or curved design are ideal for procedures in confined areas where space is limited.