Ultrasonic needles and transducer assemblies formed of non-metal materials or combination of materials

• Main Authors: MORADIAN ALA, FITZGERALD MATTHEW J, GOH TOH SENG, MCCARY BRIAN D
• Format: Patent
• Language: Chinese; English
• Published: 19.11.2019
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; TREATMENT OR PROTECTION OF EYES OR EARS

A phacoemulsification needle includes a hub for connection to an ultrasonic handpiece. An elongated shaft is formed with the hub and extends from the hub. A distal end of the shaft breaks-up tissue when the distal end is caused to be vibrated by the handpiece. At least a distal portion of the shaft is formed of a material that has properties providing advantages compared to a metal needle. Exampleproperties include a substantially lower density, a substantially higher electrical resistivity, a substantially lower thermal conductivity, a substantially lower mechanical lateral stiffness, a substantially higher efficiency of converting electrical energy powering the handpiece into motion of the distal end, a substantially lower acoustical impedance, a substantially higher Pois son's ratio, and a substantially higher mechanical gain. 超声乳化针包括用于连接到超声手持件的毂部。所述细长轴与所述毂部一起形成并且从所述毂部延伸。当通过所述手持件使得远端振动时，所述轴的所述远端破坏组织。轴的至少远侧部分由具有与金属针相比提供优点的特性的材料形成。示例性特性可以包括明显更低的密度、明显更高的电阻率、明显更低的热导率、明显更低的机械横向刚度、将给手持件供电的电能转换成远端的运动的明显更高的效率、明显更低