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Biopsy device

  • US 10,463,350 B2
  • Filed: 05/01/2015
  • Issued: 11/05/2019
  • Est. Priority Date: 05/01/2015
  • Status: Active Grant
First Claim
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1. A biopsy device, comprising:

  • a housing;

    a biopsy needle coupled to the housing, the biopsy needle including a stylet and a cannula, the stylet having a side sample port;

    a carriage assembly including a carriage slide, a cannula slide, a sampling slide, and a cannula retract spring, the carriage slide having a stylet mount end wall and the cannula slide having a cannula mount end wall;

    a charge handle slidably mounted to the housing, the charge handle having a home position and a retracted position;

    an actuator mechanism having a cannula retract button;

    a sampling spring; and

    a vacuum system positioned in the housing and carried by the carriage assembly, wherein the vacuum system is charged to generate a vacuum when the sampling spring is compressed, the vacuum system including a first vacuum pump, a second vacuum pump, a manifold and a control valve, wherein the vacuum system is configured such that;

    the first vacuum pump has a first vacuum port,the second vacuum pump has a second vacuum port,the manifold has a first vacuum draw port, a second vacuum draw port, and a first vacuum application port,the control valve has a third vacuum draw port and a second vacuum application port,the first vacuum port of the first vacuum pump is coupled in fluid communication with the first vacuum draw port of the manifold, the second vacuum port of the second vacuum pump is coupled in fluid communication with the second vacuum draw port of the manifold, the first vacuum application port of the manifold is coupled in fluid communication with the third vacuum draw port of the valve, the second vacuum draw port of the control valve is coupled in fluid communication with a first lumen of the stylet,the manifold has a first one-way valve coupled in fluid communication with the first vacuum draw port and a second one-way valve coupled in fluid communication with the second vacuum draw port, each of the first one-way valve and the second one-way valve configured to release positive pressure to the atmosphere and to close upon establishment of the vacuum, andthe control valve is operated by actuation of the cannula retract button of the actuator mechanism to apply the vacuum to the side sample port of the stylet simultaneously with movement of the cannula in a proximal direction by a force generated by the cannula retract spring to open the side sample port of the stylet.

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