Physics of ultrasonic surgery using tissue fragmentation

The ultrasonic surgical aspirator employs a vibrating metal tip to fragment tissue and then aspirates the debris through the hollow center of the tip. The mechanism of interaction has been stated to be poorly understood, most likely related to cavitation, possibly acting in concert with other mechan...

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Bibliographic Details
Published inUltrasonics Vol. 34; no. 2; pp. 579 - 585
Main Authors Bond, L.J., Cimino, W.W.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 01.06.1996
Elsevier Science
Subjects
Acoustics
Animals
Aorta - surgery
Aspiration
Biological and medical sciences
Biomechanical Phenomena
Biophysical Phenomena
Biophysics
Brain - surgery
Cavitation
Collagen
Equipment Design
General Surgery
Kidney - surgery
Medical sciences
Photography
Rheology
Suction - instrumentation
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Swine
Technology. Biomaterials. Equipments
Tissue characterization
Tissue fragmentation
Ultrasonic aspirator
Ultrasonic surgery
Ultrasonic Therapy - instrumentation
Water
Tissue fragmentation
Ultrasonic surgery
Ultrasonic aspirator
Aspiration
Cavitation
Tissue characterization
Tissue
Theoretical model
Surgery
Interaction
Experimental study
In vitro
Ultrasound
Medical application
Mechanism
Biomedical engineering
Aspirator
Fragmentation
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Summary:The ultrasonic surgical aspirator employs a vibrating metal tip to fragment tissue and then aspirates the debris through the hollow center of the tip. The mechanism of interaction has been stated to be poorly understood, most likely related to cavitation, possibly acting in concert with other mechanical actions. The role of stroke, suction, frequency, tissue type, and tip area have been examined with regard to tissue fragmentation rate. Suction is shown to make a significant contribution to the interaction. Photographic and acoustic data from experiments in water and on a range of fresh pig tissues are used to investigate the fragmentation effect. A model for the primary mechanism for tissue fragmentation is presented. This involves the horn-tip impact and other mechanical forces, operating in combination with hydrodynamic forces applied to the tissue on the forward stroke in each cycle. No evidence of cavitation in tissue was observed.
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ISSN:0041-624X
1874-9968
DOI:10.1016/0041-624X(96)00039-X