Dermatome with ultrasonic cutting blade
First Claim
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1. An ultrasonic dermatome comprising:
- a body;
an ultrasonic frequency generator mounted to the body;
a blade assembly drivingly coupled to the frequency generator so as to be selectively resonated at a natural frequency,said blade assembly including a blade element that presents a distal cutting edge operable to cut a skin graft; and
skin-engaging structure positioned adjacent the cutting edge to engage the skin,said blade assembly being supported by the body to define a distal cantilevered blade section that includes the cutting edge, with any supporting contact between the blade assembly and body being generally at a node,said distal cantilevered blade section being spaced apart from the skin-engaging structure to restrict the structure from touching the blade section and thereby restrict damping ultrasonic energy transmitted from the ultrasonic frequency generator to the cutting edge.
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Abstract
A dermatome assembly is operable to harvest a skin graft and includes an ultrasonic dermatome and a power supply. The ultrasonic dermatome includes a body and an ultrasonic blade assembly mounted in the body. The blade assembly includes a frequency generator and a cutting horn powered by the frequency generator. The cutting horn is spaced apart from the body so that the body is restricted from damping vibrational movement of the cutting horn. The dermatome assembly is operable to precisely control the thickness of the cut skin graft and also restrict the cutting horn from overheating.
5 Citations
32 Claims
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1. An ultrasonic dermatome comprising:
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a body; an ultrasonic frequency generator mounted to the body; a blade assembly drivingly coupled to the frequency generator so as to be selectively resonated at a natural frequency, said blade assembly including a blade element that presents a distal cutting edge operable to cut a skin graft; and skin-engaging structure positioned adjacent the cutting edge to engage the skin, said blade assembly being supported by the body to define a distal cantilevered blade section that includes the cutting edge, with any supporting contact between the blade assembly and body being generally at a node, said distal cantilevered blade section being spaced apart from the skin-engaging structure to restrict the structure from touching the blade section and thereby restrict damping ultrasonic energy transmitted from the ultrasonic frequency generator to the cutting edge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An ultrasonic dermatome comprising:
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a body; an ultrasonic frequency generator mounted to the body; and a blade assembly drivingly coupled to the frequency generator so as to be selectively resonated at a natural frequency, with the blade assembly having a node, said blade assembly including a blade element presenting a distal cutting edge operable to cut a skin graft, said body extending along the blade assembly adjacent the node, with the body being in supporting contact with the blade assembly at the node, said blade assembly being supported by the body to define a distal cantilevered blade section located entirely distal of the node. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification