Needle device
First Claim
Patent Images
1. A needle device for the delivery of medicaments, comprising:
- an elongated housing;
a reciprocable hollow needle having a proximal end and a distal end with a lumen there between, said proximal end secured within said housing;
a catheter disposed about said hollow needle, said catheter having a distal end and a proximal end, said proximal end of said catheter being attached to said housing;
an arrangement of compressable and releasable springs disposed within said housing and attached to said hollow needle so as to bias said hollow needle therefrom; and
a detent assembly to actuate retraction of said hollow needle within said catheter upon a decrease in pressure upon said hollow needle as it is being advanced into a space or potential space.
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Accused Products
Abstract
A needle device for delivering medicaments to the body of a patient, the device including an elongated housing having a catheter on one end, with a trocar arranged through the end of the housing and the catheter. The trocar is reciprocably advancable and retractable with respect to the catheter. A spring biased carriage in the housing controls the movement of the trocar and causes it to retract from the distal end of the catheter after the catheter and trocar have been advanced into a body and the trocar no longer encounters resistance to forward or distally directed advance of the device.
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Citations
26 Claims
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1. A needle device for the delivery of medicaments, comprising:
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an elongated housing; a reciprocable hollow needle having a proximal end and a distal end with a lumen there between, said proximal end secured within said housing; a catheter disposed about said hollow needle, said catheter having a distal end and a proximal end, said proximal end of said catheter being attached to said housing; an arrangement of compressable and releasable springs disposed within said housing and attached to said hollow needle so as to bias said hollow needle therefrom; and a detent assembly to actuate retraction of said hollow needle within said catheter upon a decrease in pressure upon said hollow needle as it is being advanced into a space or potential space. - View Dependent Claims (2)
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3. A needle device for the delivery of medicaments, catheters or medical devices, comprising:
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an elongated housing having a proximal end and a distal end; a hollow needle movably arranged through the distal end of said housing; a catheter attached to the distal end of said housing, said hollow needle movably arranged through said catheter and adapted to be distally co-terminuous therewith; and means for effectuating retraction of said hollow needle from a distally co-terminuous relationship with said catheter upon the engaging of a void in a body by said distal end of said catheter and said hollow needle.
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4. A needle device for delivery of an medicaments, comprising:
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an elongated housing having a proximal end and a distal end; a catheter having a lumen and a needle having a lumen, said needle with said lumen co-extensively arranged within the lumen of said catheter on the distal end of said housing; a means for retracting said needle into said housing and with respect to said catheter; and an indicator means on the proximal end of said housing to visually signal the retraction of said needle with said lumen with respect to said catheter and said housing, to indicate the sensing of a void in a body into which said device has been advanced. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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12. A needle device for the delivery of medicaments, comprising:
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an elongated housing having a proximal end and a distal end; a reciprocable hollow needle having a proximal end and a distal end, said proximal end of said hollow needle securable to a carriage shaft within said housing; a catheter having a proximal end and a distal end, said proximal end attachable to said distal end of said housing and over said reciprocably movable hollow needle; said carriage shaft biasedly arranged within said housing and attached at one end to the proximal end of said housing; a spring adapted to bias said hollow needle distally; and a detent assembly engagable with said carriage shaft to permit said hollow needle and carriage shaft to be biased proximally by a second spring arrangement. - View Dependent Claims (13, 14, 15, 16)
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17. A method of delivering medicaments to a body comprising the steps of:
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advancing into a body space a needle device having an elongated housing with a hollow needle at a distal end thereof, said hollow needle arranged within a catheter, said hollow needle having a proximal end biased distally by a spring arrangement within said housing; puncturing a body space by said hollow needle which extends distally beyond the distal end of said catheter; and retracting said hollow needle proximally upon said hollow needle losing resistance to forward or distal advance in a body. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A reciprocable actuable needle device for the delivery of medicaments to a body, comprising:
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a longitudinally splitable catheter removable attached to the distal end of an elongated housing, said housing having a proximal end as well as a distal end; a hollow needle assembly arranged within both said housing and said catheter; means for biasing said hollow needle assembly proximally upon loss of resistance against said hollow needle assembly during movement of said needle device in a body; and indicator means to alert a needle device user that said hollow needle has no further resistance to further distally directed movement in a body. - View Dependent Claims (24, 25, 26)
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Specification