title: Effect of sub-Tenon's and peribulbar anesthesia on intraocular pressure and ocular pulse amplitude.
abstract: OBJECTIVE
  To compare the effect of peribulbar and sub-Tenon's anesthesia on intraocular pressure (IOP) and ocular pulse amplitude (OPA) in the injected eye and the fellow noninjected (control) eye.
  
  
  METHODS
  Tel Aviv Medical Center, Tel Aviv, Israel.
  
  
  METHODS
  This prospective study measured IOP and OPA at baseline and 1 and 10 minutes after administration of lidocaine anesthesia in 40 consecutive adult patients having elective cataract surgery.
  
  
  RESULTS
  The IOP remained stable throughout the study with both modes of anesthesia. One minute after injection of the anesthetic agent, the OPA was significantly decreased in the injected eyes in both the sub-Tenon's (24%; P < .05) and peribulbar (25%; P < .05) groups. The decrease in the OPA in the sub-Tenon's group (14%; P < .05) was detectable after 10 minutes in the control eyes. In the peribulbar anesthesia group, the OPA in the control eyes increased significantly (9%; P < .05) 1 minute after injection of the anesthetic agent, returning to preinjection levels 10 minutes after the injection.
  
  
  CONCLUSIONS
  The OPA in the eyes in which lidocaine was injected decreased significantly in both the sub-Tenon's and peribulbar groups. These findings have implications for the management of patients whose ocular circulation may be compromised.
authors.affiliation: Department of Ophthalmology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel. boazp@netvision.net.il
authors.forename: P
authors.initials: P
authors.lastname: Pianka
authors.forename: H
authors.initials: H
authors.lastname: Weintraub-Padova
authors.forename: M
authors.initials: M
authors.lastname: Lazar
authors.forename: O
authors.initials: O
authors.lastname: Geyer
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000772:Anesthesia, Local / Q000379:methods*; D000779:Anesthetics, Local / Q000008:administration & dosage*; D001794:Blood Pressure / Q000187:drug effects*; D005205:Fascia / Q000187:drug effects; D005260:Female; D006801:Humans; D007429:Intraocular Pressure / Q000187:drug effects*; D008297:Male; D008875:Middle Aged; D009915:Orbit / Q000187:drug effects; D011343:Procaine / Q000008:administration & dosage* / Q000031:analogs & derivatives; D011446:Prospective Studies; D012039:Regional Blood Flow / Q000187:drug effects; D012171:Retinal Vessels / Q000502:physiology; D014065:Tonometry, Ocular
chemical_list: D000779:Anesthetics, Local; D011343:Procaine; C005298:benoxinate