A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/158 (2006.01) A61B 17/34 (2006.01) A61M 5/162 (2006.01) A61M 5/32 (2006.01) A61B 17/00 (2006.01) A61B 19/00 (2006.01)
Patent
CA 2210670
A hypodermic needle of the present invention includes an elongate hollow tube with a proximal end, a distal end and has a bore therethrough. The proximal end of the needle of the invention has a hub fixedly attached thereto to connect the needle releasably to a fluid handling device with the distal end having a point for facilitating penetration of the needle into a patient's tissue. The outside surface of the tube has a proximal portion with a lower coefficient of sliding friction with the patient's tissue than the coefficient of sliding friction with the patient's tissue than a distal portion of the outside surface of the tube. The higher coefficient of friction of the distal portion enables a practitioner to substantially discriminate the needle's penetration of structures in the patient's tissue while the lower coefficient of friction proximal portion substantially reduces drag force for passage of the proximal portion through the structures already penetrated by the distal portion.
L'aiguille hypodermique de la présente invention comprend un tube creux allongé muni d'une extrémité proximale et d'une extrémité distale percées. L'extrémité proximale de l'aiguille possède un embout fixe pour relier l'aiguille à l'appareil contenant le liquide, et pouvant le dispenser, et où on retrouve une pointe, à l'extrémité distale, pour faciliter la pénétration de l'aiguille dans les tissus du patient. La surface extérieure du tube possède une partie proximale dont le coefficient de friction avec les tissus du patient est plus faible que le coefficient de friction obtenu avec la partie distale de la surface extérieure du tube. Le coefficient de friction le plus élevé de la partie distale permet au praticien de contrôler beaucoup mieux la pénétration de l'aiguille dans les structures des tissus du patient, tandis que le coefficient le moins élevé de la partie proximale réduit de beaucoup la force de résistance lors du passage de la partie proximale dans les structures déjà pénétrées par la partie distale.
Becton Dickinson And Company
Gowling Lafleur Henderson Llp
LandOfFree
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