Your browser doesn't support javascript.
loading
Thermal effect of microburst and hyperpulse settings during sleeveless bimanual phacoemulsification with advanced power modulations.
Braga-Mele, Rosa.
Afiliação
  • Braga-Mele R; Department of Ophthalmology, University of Toronto, Toronto, Canada. rbragamele@rogers.com
J Cataract Refract Surg ; 32(4): 639-42, 2006 Apr.
Article em En | MEDLINE | ID: mdl-16698487
PURPOSE: To assess wound temperature during bimanual sleeveless phacoemulsification using customizable power modulations such as hyperpulse and microburst technology. SETTING: In vitro laboratory. METHODS: The Millennium Microsurgical System (Bausch & Lomb) with custom control software (CCS) was used to perform phacoemulsification in 5 porcine eyes with MicroFlow needles (Bausch & Lomb) and with power varied from 20% to 80% in 10% increments. Pulse modes were set for fixed microburst (4 ms on, 4 ms off; and 6 ms on, 12 or 24 ms off) and for hyperpulse (30% duty cycle with 8 or 75 pulses per second [pps]), with and without aspiration-line occlusion. Wound temperatures were measured 3 times per second. RESULTS: Using 80% total power, the wound temperature during 3 minutes of occlusion did not exceed 39.0 degrees C. The maximum temperature with fixed microbursts of 4 ms on, 4 ms off was 29.0 degrees C without occlusion and 37.8 degrees C with occlusion (duration 3 minutes). At 6 ms on, 12 ms off, the maximum temperatures were 28.1 degrees C and 38.7 degrees C, respectively. At 6 ms on, 24 ms off, peak temperatures were 24 degrees C and 23.6 degrees C, respectively. The hyperpulse mode of 30% duty cycle and 8 pps produced maximum temperatures of 25.5 degrees C nonoccluded and 33.4 degrees C occluded. With 30% duty cycle, 75 pps, temperatures were 28 degrees C and 38.0 degrees C, respectively. For all power below 80%, temperatures were lower. CONCLUSIONS: Customizable power modulation with microburst and hyperpulse technology further reduced wound temperatures during bimanual sleeveless phacoemulsification. This enhances the safety and effectiveness of phacoemulsification through a sleeveless needle and a small stab incision.
Assuntos
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Temperatura Corporal / Queimaduras Oculares / Facoemulsificação / Temperatura Alta / Segmento Anterior do Olho Limite: Animals Idioma: En Revista: J Cataract Refract Surg Assunto da revista: OFTALMOLOGIA Ano de publicação: 2006 Tipo de documento: Article País de afiliação: Canadá
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Temperatura Corporal / Queimaduras Oculares / Facoemulsificação / Temperatura Alta / Segmento Anterior do Olho Limite: Animals Idioma: En Revista: J Cataract Refract Surg Assunto da revista: OFTALMOLOGIA Ano de publicação: 2006 Tipo de documento: Article País de afiliação: Canadá