Combined spinal epidural needle set
First Claim
1. A combined spinal epidural needle set comprising:
- an epidural needle with an overall length, a hollow bore defining an axis therethrough having an inside diameter, an open distal end and a proximal end including a hub;
a spinal needle with an overall length greater than said epidural needle with an outside diameter less than said inside diameter of said bore of said epidural needle having a hollow passage therethrough, a pointed distal end, a proximal end including a hub, said spinal needle being slidably disposed for movement within said epidural needle between a position wherein said distal point of said spinal needle is substantially coincident with said open distal end of said epidural needle and at least one position wherein said distal point of said spinal needle projects a distance beyond said open distal end of said epidural needle; and
wherein said both hubs of said epidural needle and said spinal needle each include adjustable engagement means for preselecting and releasably maintaining said position of said distal point of said spinal needle with respect to said open distal end of said epidural needle, and wherein said hub of said epidural needle engages said hub of said spinal needle when said distal point of said spinal needle projects beyond said distal point of said epidural needle.
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Accused Products
Abstract
A combined spinal epidural needle set of the present invention includes an epidural needle with an overall length, an open distal end and a proximal end with a hub. The epidural needle has a hollow bore therethrough having an inside diameter. The set of the invention includes a spinal needle with an overall length greater than the length of the epidural needle, a pointed distal end, a proximal end with a hub and a hollow passage therethrough. The spinal needle has an outside diameter less than the inside diameter of the bore of the epidural needle. The spinal needle is slidably disposed for movement within the epidural needle between a position wherein the distal point of the spinal needle is substantially coincident with the open distal end of the epidural needle and at least one position wherein the distal point of the spinal needle projects beyond the open distal end of the epidural needle. The hubs of the epidural needle and the spinal needle each include an adjustable engagement for preselecting the position of the distal point of the spinal needle with respect to the open distal end of the epidural needle.
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Citations
20 Claims
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1. A combined spinal epidural needle set comprising:
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an epidural needle with an overall length, a hollow bore defining an axis therethrough having an inside diameter, an open distal end and a proximal end including a hub; a spinal needle with an overall length greater than said epidural needle with an outside diameter less than said inside diameter of said bore of said epidural needle having a hollow passage therethrough, a pointed distal end, a proximal end including a hub, said spinal needle being slidably disposed for movement within said epidural needle between a position wherein said distal point of said spinal needle is substantially coincident with said open distal end of said epidural needle and at least one position wherein said distal point of said spinal needle projects a distance beyond said open distal end of said epidural needle; and wherein said both hubs of said epidural needle and said spinal needle each include adjustable engagement means for preselecting and releasably maintaining said position of said distal point of said spinal needle with respect to said open distal end of said epidural needle, and wherein said hub of said epidural needle engages said hub of said spinal needle when said distal point of said spinal needle projects beyond said distal point of said epidural needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A combined spinal epidural needle set comprising:
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an epidural needle with an overall length, a hollow bore defining an axis therethrough having an inside diameter, an open distal end and a proximal end including a hub comprising a female luer fitting; a spinal needle with an overall length greater than said epidural needle with an outside diameter less than said inside diameter of said bore of said epidural needle having a hollow passage therethrough, a pointed distal end, a proximal end including a hub comprising a male luer, said spinal needle being slidably disposed for movement within said epidural needle between a position wherein said distal point of said spinal needle is substantially coincident with said open distal end of said epidural needle and at least one position wherein said distal point of said spinal needle projects a distance beyond said open distal end of said epidural needle, and wherein said male luer fitting on said spinal needle hub is disposed to engage said female luer fitting on said proximal hub of said epidural needle when said spinal needle distal point is projected beyond said open distal end of said epidural needle; and wherein said both hubs of said epidural needle and said spinal needle each include adjustable engagement means for preselecting and releasably maintaining said position of said distal point of said spinal needle with respect to said open distal end of said epidural needle.
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Specification