title: Temperature in the anterior chamber during phacoemulsification.
abstract: OBJECTIVE
  To evaluate changes in the aqueous humor temperature using 2 phacoemulsification units (Stellaris 28.5 kHz device and Whitestar Signature 40 kHz device).
  
  
  METHODS
  Nippon Medical School, Musashikosugi Hospital, Kawasaki City, Kanagawa, Japan.
  
  
  METHODS
  Experimental study.
  
  
  METHODS
  Aqueous humor temperatures were measured with a temperature probe set in the anterior chamber during ultrasound (US) oscillation in porcine eyes under 5 conditions.
  
  
  RESULTS
  Continuous longitudinal oscillation caused a rapid rise in aqueous humor temperature, while the pulse and elliptical modes suppressed temperature elevation. Reducing the number of US tip vibrations did not reduce the temperature in the anterior chamber. However, raising the vacuum setting allowed the aspirations to rise to the set value, thereby lowering the temperature in the anterior chamber.
  
  
  CONCLUSIONS
  Because differences in the phacoemulsification settings can lead to temperature elevations in the anterior chamber, surgeons must carefully monitor these settings to prevent corneal tissue damage.
authors.affiliation: From the Department of Ophthalmology (Igarashi, Shiwa, Takahashi), Nippon Medical School, Nippon Medical School, Musashikosugi Hospital, Kawasaki City, Kanagawa, and private clinic (Oki), Tokyo, Japan. Electronic address: s5054@nms.ac.jp.
authors.forename: Hisaharu
authors.initials: H
authors.lastname: Suzuki
authors.affiliation: From the Department of Ophthalmology (Igarashi, Shiwa, Takahashi), Nippon Medical School, Nippon Medical School, Musashikosugi Hospital, Kawasaki City, Kanagawa, and private clinic (Oki), Tokyo, Japan.
authors.forename: Kotaro
authors.initials: K
authors.lastname: Oki
authors.affiliation: From the Department of Ophthalmology (Igarashi, Shiwa, Takahashi), Nippon Medical School, Nippon Medical School, Musashikosugi Hospital, Kawasaki City, Kanagawa, and private clinic (Oki), Tokyo, Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Igarashi
authors.affiliation: From the Department of Ophthalmology (Igarashi, Shiwa, Takahashi), Nippon Medical School, Nippon Medical School, Musashikosugi Hospital, Kawasaki City, Kanagawa, and private clinic (Oki), Tokyo, Japan.
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Shiwa
authors.affiliation: From the Department of Ophthalmology (Igarashi, Shiwa, Takahashi), Nippon Medical School, Nippon Medical School, Musashikosugi Hospital, Kawasaki City, Kanagawa, and private clinic (Oki), Tokyo, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Takahashi
mesh_terms: D000818:Animals; D001082:Aqueous Humor / Q000502:physiology*; D001831:Body Temperature / Q000502:physiology*; D018918:Phacoemulsification; D013396:Suction; D013552:Swine; D013817:Thermography; D014465:Ultrasonics / Q000295:instrumentation*