title: Anterior chamber irrigation with unpreserved lidocaine 1% for anesthesia during cataract surgery.
abstract: OBJECTIVE
  To assess the effectiveness of using anterior chamber irrigation of unpreserved lidocaine 1% as anesthesia during cataract surgery.
  
  
  METHODS
  Private group ophthalmology practice.
  
  
  METHODS
  This study prospectively evaluated 1000 of 1012 consecutive eyes having temporal corneal incision cataract surgery to determine whether anterior chamber lidocaine provides adequate anesthesia for cataract surgery. Twelve eyes were excluded because the patients had preoperative sedation. Surgery on the remaining 1000 eyes was performed by one surgeon without patients receiving preoperative or intraoperative sedation or other medications other than the local anesthetic and dilating agents. Each received one drop of topical proparacaine before entering the operating room. After an initial corneal stab incision was made, 0.25 to 0.50 cc of unpreserved lidocaine 1% was irrigated into the anterior chamber.
  
  
  RESULTS
  One patient was so uncomfortable from the microscope that he required supplemental retrobulbar anesthesia. A second patient was extremely uncomfortable during the case but did not require supplemental anesthesia. Two patients received additional dosages of anesthetic because of discomfort late in the operation. The remaining 996 patients were comfortable and pain-free during the operation with a single dose of the anesthetic.
  
  
  CONCLUSIONS
  Anterior chamber irrigation with unpreserved lidocaine 1% was an effective method for anesthetizing an eye for temporal corneal incision cataract surgery.
authors.affiliation: Koch Eye Associates, Warwick, Rhode Island 02886, USA.
authors.forename: P S
authors.initials: PS
authors.lastname: Koch
mesh_terms: D000779:Anesthetics, Local / Q000008:administration & dosage* / Q000627:therapeutic use; D000867:Anterior Chamber; D002387:Cataract Extraction; D006801:Humans; D008012:Lidocaine / Q000008:administration & dosage* / Q000627:therapeutic use; D011446:Prospective Studies; D007507:Therapeutic Irrigation; D016896:Treatment Outcome
chemical_list: D000779:Anesthetics, Local; D008012:Lidocaine