Development of a Handpiece and Probes for a Microsurgical Ultrasonic Aspirator: Instrumentation and Application

Development of a Handpiece and Probes for a Microsurgical Ultrasonic Aspirator: Instrumentation... AbstractOBJECTIVE:To address the several disadvantages of currently available ultrasonic aspirators used in microsurgery, new instruments were designed for neurosurgical use under a microscope.DESCRIPTION OF INSTRUMENTATION:The weight of the handpiece was reduced to 90 g. Two types of angled probes were constructed. Keyhole-type probes have 93- and 112-mm lengths, a 2.2-mm tip diameter, and 9.5- and 11.2-mm sheath diameters at the most proximal site and produce a tip amplitude of 300 mm (supplied by 23.5-kHz ultrasonic power). Needle-type probes have 89- and 171-mm lengths, a 1.9-mm tip diameter, and 3.5- and 3.3-mm sheath diameters at the proximal site and produce a tip amplitude of 70 mm. All of these instruments are compatible with magnetic resonance imaging.METHODS:The newly developed handpiece and probes were used in an experimental model. The 119 mass lesions treated included giant thrombosed aneurysms, various gliomas, vestibular schwannomas, deep-seated meningiomas, clival tumors, and suprasellar tumors.EXPERIENCE AND RESULTS:The handpiece and probes were safely used in regions that are difficult to access, such as the third ventricle and the cerebellopontine angle. It was possible to manipulate the needle-type probe in the suprasellar region through the transsphenoidal route, and the probe was very efficient for thrombectomy in giant aneurysms. The ultrasonic power of keyhole-type probes was sufficient to remove meningiomasCONCLUSION:This newly developed neurosurgical handpiece with angled probes has great utility for microscopic dissections, because of its small size and light weight. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Neurosurgery Oxford University Press

Development of a Handpiece and Probes for a Microsurgical Ultrasonic Aspirator: Instrumentation and Application

Development of a Handpiece and Probes for a Microsurgical Ultrasonic Aspirator: Instrumentation and Application

I N S T R U M E N T A T I O N A N D A P P L I C A T I O N Development of a Handpiece and Probes for a Microsurgical Ultrasonic Aspirator: Instrumentation and Application Yutaka Sawamura, M.D., D.M.Sc., Takanori Fukushima, M.D., D.M.Sc., Shunsuke Terasaka, M.D., Toshiya Sugai, B.E. D e p a r t m e n t o f N e u r o s u r g e r y (YS, ST), H o k k a i d o U n iv e r s ity , S a p p o r o , J a p a n ; C e n t e r for Skull B a s e S u rg e ry (TF), C a r o l i n a N e u r o s c i e n c e Institute, R a le i g h , N orth C a r o l i n a ; a n d O l y m p u s O p t i c a l C o m p a n y , Ltd. (TS), T o k y o , J a p a n O B JE C T IV E : To address the several disadvantages of currently availab le ultrasonic aspirators used in microsurgery, new instruments w ere designed for neurosurgical use under a m icroscope. D E S C R IP T IO N O F IN S T R U M E N T A T IO N : The weight of the handpiece was reduced to 90 g. Tw o types of angled probes w ere constructed. Keyhole-type probes have 93- and 112-mm lengths, a 2.2-mm tip diameter, and 9 .5 - and 11.2-mm sheath diameters at the most proximal site and produce a tip am plitude of 300 /mm (supplied by 23.5-kHz ultrasonic pow er). Needle-type probes have 89- and 171-mm lengths, a 1.9-mm tip diameter, and 3 .5 - and 3.3-mm sheath diam eters at the proximal site and produce a tip am plitude of 70 /mm. A ll of these instruments are com patible w ith magnetic resonance imaging. M E T H O D S : The new ly developed handpiece and probes w ere used in an experim ental model. The 119 mass lesions treated included giant thrombosed aneurysms, various gliomas, vestibular schwannom as, deep-seated meningi­ omas, clival tumors, and suprasellar tumors. EX PER IEN C E A N D RESU LTS: The handpiece and probes w ere safely used in regions that are d ifficult to access, such as the third ventricle and the cerebellopontine angle. It was possible to m anipulate the needle-type probe in the suprasellar region through the transsphenoidal...
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Publisher
Congress of Neurological Surgeons
Copyright
© Published by Oxford University Press.
ISSN
0148-396X
eISSN
1524-4040
D.O.I.
10.1097/00006123-199911000-00035
Publisher site
See Article on Publisher Site

Abstract

AbstractOBJECTIVE:To address the several disadvantages of currently available ultrasonic aspirators used in microsurgery, new instruments were designed for neurosurgical use under a microscope.DESCRIPTION OF INSTRUMENTATION:The weight of the handpiece was reduced to 90 g. Two types of angled probes were constructed. Keyhole-type probes have 93- and 112-mm lengths, a 2.2-mm tip diameter, and 9.5- and 11.2-mm sheath diameters at the most proximal site and produce a tip amplitude of 300 mm (supplied by 23.5-kHz ultrasonic power). Needle-type probes have 89- and 171-mm lengths, a 1.9-mm tip diameter, and 3.5- and 3.3-mm sheath diameters at the proximal site and produce a tip amplitude of 70 mm. All of these instruments are compatible with magnetic resonance imaging.METHODS:The newly developed handpiece and probes were used in an experimental model. The 119 mass lesions treated included giant thrombosed aneurysms, various gliomas, vestibular schwannomas, deep-seated meningiomas, clival tumors, and suprasellar tumors.EXPERIENCE AND RESULTS:The handpiece and probes were safely used in regions that are difficult to access, such as the third ventricle and the cerebellopontine angle. It was possible to manipulate the needle-type probe in the suprasellar region through the transsphenoidal route, and the probe was very efficient for thrombectomy in giant aneurysms. The ultrasonic power of keyhole-type probes was sufficient to remove meningiomasCONCLUSION:This newly developed neurosurgical handpiece with angled probes has great utility for microscopic dissections, because of its small size and light weight.

Journal

NeurosurgeryOxford University Press

Published: Nov 1, 1999

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