system
Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Aged, Catheters, Female, Humans, Intraocular Pressure, Intraoperative Complications, Male, Microsurgery, Phacoemulsification, Retrospective Studies, Sclerostomy, Suture Techniques, Tonometry, Ocular, Vitrectomy.
user
Do the use of a 20-gauge valved cannula during pars plana phacofragmentation with a 23-gauge ultrasonic fragmatome? Context: To evaluate the usefulness of a 20-gauge cannula to maintain a self-sealing sclerotomy wound after 23-gauge phacofragmentation. This retrospective study compared the suture rates after 23-gauge phacofragmentation when the 23-gauge cannula was temporarily replaced with a 20-gauge valved metal cannula versus when the 23-gauge fragmatome was inserted at the sclerotomy site without a cannula. Whereas a sclerotomy was sutured in all 31 eyes in the without-cannula group, only one eye of 14 in the cannula group required a sclerotomy suture (P < .0001). However, there was one case of fragmatome tip fracture during fragmentation in the cannula group.
assistant
A self-sealing sclerotomy wound can be maintained without suturing by using a 20-gauge metal cannula, but fragmatome tip fracture can occur during fragmentation. Final Decision: yes