Biopsy device having integrated vacuum
First Claim
1. A biopsy device, comprising:
- a housing body defining a longitudinal axis;
a cannula assembly having an actuator body and an elongate cannula affixed to the actuator body,the elongate cannula having a side wall defining a lumen, and having a vacuum side port that extends through the side wall and in fluid communication with the lumen;
the actuator body having a drive tab and a proximal latch mechanism, the proximal latch mechanism configured to selectively engage the housing body to releasably latch the cannula assembly in a retracted position;
a cannula drive spring coupled between the housing body and the actuator body, the cannula drive spring configured to be compressed when the proximal latch mechanism is moved to the retracted position and configured to decompress to propel the elongate cannula in a distal direction when the proximal latch mechanism is released from the retracted position;
a vacuum source coupled to the housing body and configured to store a vacuum, the vacuum source including a vacuum chamber housing having a chamber open end, a chamber end wall, a chamber side wall extending between the chamber open end and the chamber end wall, and a chamber vacuum port, the chamber side wall having a perimeter defining a U-shaped area in cross-section that extends longitudinally between the chamber open end and the chamber end wall to define a U-shaped volume; and
a trigger slide assembly having a slider body operatively coupled to the drive tab of the cannula assembly and to the vacuum source,wherein a portion of the chamber side wall defines an elongate recessed trough having a longitudinal extent, wherein the elongate cannula is positioned within the elongate recessed trough without contacting the chamber side wall.
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Abstract
A biopsy device includes a housing body, and a cannula assembly having a first elongate cannula and a second elongate cannula coaxial with the first elongate cannula. The second elongate cannula has a side wall and a lumen. The side wall has a vacuum side port in fluid communication with the lumen. A vacuum source is positioned in the housing body. The vacuum source has a chamber side wall, which may define a U-shaped volume, and has a chamber vacuum port. A seal is interposed in sealing engagement between the chamber vacuum port and the second elongate cannula. A trigger slide assembly is configured to move the second elongate cannula to align the vacuum side port of the second elongate cannula with the chamber vacuum port of the vacuum source to supply vacuum from the vacuum source to the lumen of the second elongate cannula.
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Citations
20 Claims
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1. A biopsy device, comprising:
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a housing body defining a longitudinal axis; a cannula assembly having an actuator body and an elongate cannula affixed to the actuator body, the elongate cannula having a side wall defining a lumen, and having a vacuum side port that extends through the side wall and in fluid communication with the lumen; the actuator body having a drive tab and a proximal latch mechanism, the proximal latch mechanism configured to selectively engage the housing body to releasably latch the cannula assembly in a retracted position; a cannula drive spring coupled between the housing body and the actuator body, the cannula drive spring configured to be compressed when the proximal latch mechanism is moved to the retracted position and configured to decompress to propel the elongate cannula in a distal direction when the proximal latch mechanism is released from the retracted position; a vacuum source coupled to the housing body and configured to store a vacuum, the vacuum source including a vacuum chamber housing having a chamber open end, a chamber end wall, a chamber side wall extending between the chamber open end and the chamber end wall, and a chamber vacuum port, the chamber side wall having a perimeter defining a U-shaped area in cross-section that extends longitudinally between the chamber open end and the chamber end wall to define a U-shaped volume; and a trigger slide assembly having a slider body operatively coupled to the drive tab of the cannula assembly and to the vacuum source, wherein a portion of the chamber side wall defines an elongate recessed trough having a longitudinal extent, wherein the elongate cannula is positioned within the elongate recessed trough without contacting the chamber side wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A biopsy device, comprising:
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a housing body defining a longitudinal axis; a cannula assembly having an actuator body and an elongate cannula affixed to the actuator body, the elongate cannula having a side wall defining a lumen, and having a vacuum side port that extends through the side wall and in fluid communication with the lumen; the actuator body having a drive tab and a proximal latch mechanism, the proximal latch mechanism configured to selectively engage the housing body to releasably latch the cannula assembly in a retracted position; a cannula drive spring coupled between the housing body and the actuator body, the cannula drive spring configured to be compressed when the proximal latch mechanism is moved to the retracted position and configured to decompress to propel the elongate cannula in a distal direction when the proximal latch mechanism is released from the retracted position; a vacuum source coupled to the housing body and configured to store a vacuum, the vacuum source including a vacuum chamber housing having a chamber open end, a chamber end wall, a chamber side wall extending between the chamber open end and the chamber end wall, and a chamber vacuum port, the chamber side wall having a perimeter defining a U-shaped area in cross-section that extends longitudinally between the chamber open end and the chamber end wall to define a U-shaped volume; a trigger slide assembly having a slider body operatively coupled to the drive tab of the cannula assembly and to the vacuum source; a vacuum plunger mechanism having a U-shaped piston that is positioned in the U-shaped volume of the vacuum chamber housing; and a chamber seal configured for sealing engagement between an interior surface of the chamber side wall and the U-shaped piston. - View Dependent Claims (10, 11)
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12. A biopsy device, comprising:
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a housing body defining a longitudinal axis; a cannula assembly having an actuator body and an elongate cannula affixed to the actuator body, the elongate cannula having a side wall defining a lumen, and having a vacuum side port that extends through the side wall and in fluid communication with the lumen; the actuator body having a drive tab and a proximal latch mechanism, the proximal latch mechanism configured to selectively engage the housing body to releasably latch the cannula assembly in a retracted position; a cannula drive spring coupled between the housing body and the actuator body, the cannula drive spring configured to be compressed when the proximal latch mechanism is moved to the retracted position and configured to decompress to propel the elongate cannula in a distal direction when the proximal latch mechanism is released from the retracted position; a vacuum source coupled to the housing body and configured to store a vacuum, the vacuum source including a vacuum chamber housing having a chamber open end, a chamber end wall, a chamber side wall extending between the chamber open end and the chamber end wall, and a chamber vacuum port, the chamber side wall having a perimeter defining a U-shaped area in cross-section that extends longitudinally between the chamber open end and the chamber end wall to define a U-shaped volume; a trigger slide assembly having a slider body operatively coupled to the drive tab of the cannula assembly and to the vacuum source, wherein the housing body comprises a proximal end wall, a distal end wall, and an interior wall located between the proximal end wall and the distal end wall, the proximal end wall of the housing body has a first pair of handle link openings, and the interior wall of the housing body has a second pair of link openings, and further comprising; a vacuum prime handle mechanism having a handle base and a pair of elongate handle links that extend from the handle base, the pair of elongate handle links positioned to pass through the first pair of handle link openings of the proximal end wall, pass through a proximal chamber of the housing body, and pass through the second pair of link openings of the interior wall; and the vacuum source having a plunger mechanism including; a piston and a chamber seal configured for sealing engagement between an interior surface of the chamber side wall and the piston; and a pair of piston link rods that extend proximally from a proximal surface of the piston, each of the pair of piston link rods having a proximal end and a bore extending distally from the proximal end for receiving the pair of elongate handle links, and the pair of piston link rods configured to pass through the corresponding pair of link openings in the interior wall of the housing body and into the proximal chamber; a pair of bias springs received over the pair of elongate handle links, and each of the bias springs being positioned between the proximal end wall of the housing body and a respective proximal end of the pair of piston link rods; and a pair of joining features configured to slidably connect the pair of piston link rods with the pair of elongate handle links. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification