Needle assembly with removable depth stop
First Claim
Patent Images
1. A convertible needle assembly (10) comprising:
- a mounting structure (12);
a needle (14) having a longitudinal axis and a sharp end (28, 32), the needle being mounted on the mounting structure and projecting outwardly from the mounting structure so that the sharp end is generally remote from the mounting structure;
a depth stop (52) adapted to limit the depth of penetration of the needle;
a rotary connector (66) adapted to releasably connect the depth stop to the needle assembly, the released depth stop being removable from the needle for increasing the possible depth of penetration of the needle.
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Abstract
A needle assembly (10) includes a needle (14) attached to mounting structure (12), and is used to insert the needle into the body of a patient. A depth stop unit (50) of the needle assembly provides a stop surface (58) to limit the distance the needle can be inserted into the body. The depth stop unit may include a depth stop (52) that is adjustable to selectively change the depth to which the needle can be inserted. The entire depth stop unit can be removed from the needle assembly to permit the full length of the needle to penetrate into the body.
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Citations
20 Claims
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1. A convertible needle assembly (10) comprising:
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a mounting structure (12);
a needle (14) having a longitudinal axis and a sharp end (28, 32), the needle being mounted on the mounting structure and projecting outwardly from the mounting structure so that the sharp end is generally remote from the mounting structure;
a depth stop (52) adapted to limit the depth of penetration of the needle;
a rotary connector (66) adapted to releasably connect the depth stop to the needle assembly, the released depth stop being removable from the needle for increasing the possible depth of penetration of the needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A bone needle assembly (10) comprising:
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a handle (12);
a needle (14) having a longitudinal axis and a sharp end (28, 32), the needle being mounted on the handle at a location away from the sharp end of the needle and projecting outwardly from the handle;
a depth stop unit (50) comprising a positioning stem (62), a depth stop (52) mounted on the position stem and movable along a length of the stem to different selected positions along the stem and along the longitudinal axis of the needle, the depth stop having a stop surface (58) adapted to limit the depth of penetration of the needle, and a rotary connector (66) adapted to releasably connect the stem to the needle assembly, the rotary connector being capable of releasing connection of the stem so that the stem and depth stop may be removed from the needle for increasing the possible depth of penetration of the needle. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of adjusting a permissible depth of penetration of a needle (14) of a needle assembly (10) comprising:
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releasing a rotary connection of a depth stop unit (50) to the needle assembly, the depth stop unit including a depth stop (52) positioned along a longitudinal axis of the needle and limiting the depth of penetration of the needle to a first depth;
sliding the depth stop unit off of the needle to expose an additional length of the needle for penetration of the needle to a second depth greater than the first depth. - View Dependent Claims (19, 20)
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Specification