Multiple sampling needle having one-way valve
AssigneeBecton, Dickinson and Company
InventorJoseph Kaufman
Life of this patent
Estimating the term…
Abstract
A blood sampling device having a valve assembly which prevents the backflow of blood into a patient, and which is especially suitable for multiple sample collection. The valve assembly includes a mounting structure for a valve member, a chamber to house the valve, and a valve which has a resilient skirt allowing fluid flow only in one direction. The valve member is prevented from cocking by a protruding portion which fits within a recess of the mounting structure and by valve positioning members within the valve chamber.
Claims22
A multiple blood sampling assembly adapted to be coupled with an evacuated container to obtain blood samples from a patient, said assembly comprising:
- a. a housing having a forward end, a rear end, and having a chamber therein;
- b. a cannula mounted to the forward end of the housing, adapted for injection of a patient, and in fluid communication with the chamber;
- c. a valve mounting structure positioned within the chamber, said mounting structure having a recess therein;
- and
- d. a valve member mounted upon the mounting structure, said valve member having a resilient skirt in a normally sealing relation with the walls of the chamber, said skirt being capable of expanding against the chamber walls to prevent backflow towards the patient or collapsing to allow flow towards the rear end of the housing, and a protrusion extending towards the rear of the housing which is positioned within the recess in the mounting structure to prevent cocking of the valve.
A multiple blood sampling assembly adapted to be coupled with an evacuated container to obtain blood samples from a patient, comprising:
- a housing having a forward end, a rear end, and having a chamber including substantially cylindrical side walls therein;
- a cannula mounted to the forward end of the housing which is adapted for penetration of a vein, said cannula being in fluid communication with said chamber;
- a valve mounting structure positioned within said chamber and extending towards the forward end of the housing;
- a valve member mounted upon said valve mounting structure, said valve member including a body portion and a skirt extending rearwardly from said body portion, said skirt normally contacting the cylindrical walls of said chamber, said valve mounting structure extending within said skirt so as to contact a rear surface of said body portion of said valve member;
- and
- valve positioning means extending rearwardly into said chamber from said housing, said valve positioning means having a rearward end adjacent the body portion of said valve member to limit the possible forward motion thereof, said valve mounting structure including a recess, said body portion of said valve member includes a rearwardly extending protrusion, said protrusion being positioned within said recess.
Dependencies are inferred from the claim text.