Needle device with improved handle
First Claim
1. A biopsy needle assembly having a handle with a distal surface from which a needle extends distally and a proximal surface for engagement of the handle by the palm of a user,said proximal surface having a concave curved proximal extremity having a first end and a second end, said first end being narrow relative to said second end, the second, wide end being curved to conform to the shape of a user'"'"'s palm, and the narrow first end forming a surface to limit lateral slippage in the direction of the user'"'"'s forefinger, said concave surface having a center which is displaced from said needle toward said wide end,the distal surface having a receiving opening;
- a cannula having a central lumen, the cannula having a first end extending into said receiving opening and being connected to said distal surface of said handle toward said relatively narrow end and having a second end extending distally from said handle opening; and
a removable stylet adapted to be fitted within said lumen, said stylet having first and second ends, said first end of stylet having a knob which forms a proximal grasping means, said proximal knob adapted to be carried by said handle and conforming to an indentation in said handle, said stylet, in use, being positioned within and extending through the length of said cannula lumen.
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0 Petitions
Accused Products
Abstract
A bone biopsy needle assembly which includes a handle having a proximal concave curved surface having an off-center radius producing a first relatively narrow end and a second relatively wide end of the handle. The wide end is curved to conform to the shape of a user'"'"'s palm, and the narrow end forms a surface to limit lateral slippage in the direction of the user'"'"'s forefinger. The handle also has a distal surface with a receiving opening. A cannula has a central lumen, with a first end extending into the receiving opening and being connected to the distal surface of the handle toward the relatively narrow end and having a second end extending distally from the handle. A removable stylet is slidably received within the lumen and has a proximal knob carried by the handle.
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Citations
19 Claims
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1. A biopsy needle assembly having a handle with a distal surface from which a needle extends distally and a proximal surface for engagement of the handle by the palm of a user,
said proximal surface having a concave curved proximal extremity having a first end and a second end, said first end being narrow relative to said second end, the second, wide end being curved to conform to the shape of a user'"'"'s palm, and the narrow first end forming a surface to limit lateral slippage in the direction of the user'"'"'s forefinger, said concave surface having a center which is displaced from said needle toward said wide end, the distal surface having a receiving opening; -
a cannula having a central lumen, the cannula having a first end extending into said receiving opening and being connected to said distal surface of said handle toward said relatively narrow end and having a second end extending distally from said handle opening; and a removable stylet adapted to be fitted within said lumen, said stylet having first and second ends, said first end of stylet having a knob which forms a proximal grasping means, said proximal knob adapted to be carried by said handle and conforming to an indentation in said handle, said stylet, in use, being positioned within and extending through the length of said cannula lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 15)
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8. A biopsy needle assembly, comprising:
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a handle having a proximal concave curved surface having first and second raised ends on opposite sites of a depressed center which is displaced toward one end of said handle thus forming a first relatively narrow end and a second end which is relatively wide relative to said first end, the wide end being curved to conform to the shape of a user'"'"'s palm, and the narrow end forming a surface to limit lateral slippage in the direction of the user'"'"'s forefinger, the handle also having a distal surface, the distal surface having a receiving opening; a cannula having a central lumen, the cannula having a first end extending into said receiving opening and being connected to said distal surface of said handle toward said relatively narrow end and having a second end extending distally from said handle; and a removable stylet to be fitted within said lumen having first and second ends, said stylet having a proximal knob positioned within a hollow part of said handle and a shaft positioned within and extending through the length of said cannula lumen. - View Dependent Claims (9, 16, 17, 18)
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10. A biopsy needle assembly having a handle with a distal surface from which a biopsy aspiration needle extends distally and a proximal surface for engagement of the handle by the palm of a user,
said proximal surface having a concave curved proximal extremity having a first raised relatively narrow end and a second raised relatively wide end relative to said first end, the wide end being curved to conform to the shape of a user'"'"'s palm, and the narrow end forming a surface to limit lateral slippage in the direction of the user'"'"'s forefinger, said concave surface having a center which is displaced from said needle toward said wide end and having a stylet knob receiving indentation, the distal surface having a cannula receiving opening; -
a cannula having a central lumen, the cannula having a first end extending into said receiving opening and being connected to said distal surface of said handle toward said relatively narrow end and having a second end extending distally from said handle; and a removable stylet fitted within said lumen having first and second ends, said stylet having a proximal knob carried by said handle, being fitted in said indentation and a shaft positioned within and extending through the length of said cannula lumen. - View Dependent Claims (11, 12, 13, 14, 19)
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Specification