Device for withdrawing fluids

• US 5,097,842 A
• Filed: 07/23/1990
• Issued: 03/24/1992
• Est. Priority Date: 07/23/1990
• Status: Expired due to Fees

• Current Assignee: Gina B. Bonn
• Original Assignee: Gina B. Bonn
• Inventors: Bonn, Gina B.
• Primary Examiner(s): HINDENBURG, MAX F
• Application Number:
  US07/557,408
• Time in Patent Office: 610 Days
• Field of Search: 604/33, 604/249, 604/191, 604/187, 128/762, 128/763, 128/765, 128/766, 137/625.48, 137/883, 251/325
• US Class Current: 600/575
• CPC Class Codes: A61B 5/150038 for blood from umbilical cord
• CPC Class Codes: A61B 5/150221 Valves
• CPC Class Codes: A61B 5/154 Devices using pre-evacuated means
• CPC Class Codes: A61B 5/155 Devices specially adapted for continuous or multiple sampling, e.g. at predetermined intervals devices loaded with multiple lancets simultaneously A61B5/15146

Abstract

Devices for extracting blood or other body fluids, and particularly for extracting blood from the umbilical cord. A hypodermic needle for insertion into the umbilical cord is attached to a valve housing, to which is connected one or more vacuum containers or test tubes. One or more valves in the housing may be positioned to connect the needle with each vacuum container or test tube as desired. Bodily fluids may thus be extracted without the need to perform multiple injections or to stick multiple vacuum containers with the same syringe. The devices lend convenience to the newborn blood testing process and reduce the chances of inadvertent blood spillage.

Claims

1. A body fluid extraction device, comprising:

(a) a housing containing an intake chamber, two exhaust chambers and a central chamber connecting the intake and exhaust chambers;

(b) for each of the intake and exhaust chambers, an accommodation on the outer surface of the housing communicating with the chamber to which a hollow hypodermic needle may be connected; and

(c) a pair of valves, each of which includes a shaft that slides in the central chamber and which includes;

(i) a hollow portion;

(ii) a first port located at a first location on the shaft and a second port located at a second location on the shaft, which ports communicate with each other through the hollow portions of the shaft, and which locations are positioned on the shaft so that they allow the intake chamber to communicate with an exhaust chamber associated with the valve when the valve is in the open position; and

(iii) a pair of O rings positioned on the shaft between the first and second openings to form a closed space between the housing and the shaft, which closed space communicates with the associated exhaust chamber when the valve is in the closed position in order to disconnect the intake chamber from the exhaust chamber.

2. A body fluid extraction device, comprising:

(a) a housing containing an intake chamber, two exhaust chambers and a central chamber which allows the intake and exhaust chambers to communicate;

(b) for each of the intake and exhaust chambers, an accommodation formed on the housing for connection to a hollow hypodermic needle;

(c) a hollow hypodermic needle connected to each accommodation in a fluid-tight relationship;

(d) a vacuum container corresponding to each needle that is connected to an exhaust chamber;

(e) a pair of valves, each of which includes a shaft which slides in the central chamber and which includes;

(i) a hollow portion;

(ii) a first port located at a first location on the shaft and a second port located at a second location on the shaft, which ports communicate with each other through the hollow portion of the shaft, and which locations are positioned on the shaft so that they allow the intake chamber to communicate with an exhaust chamber associated with the valve when the valve is in the open position; and

(iii) a pair of O rings positioned on the shaft between the first and second openings to form a closed space between the housing and the shaft, which closed space communicates with the associated exhaust chamber when the valve is in the closed position in order to disconnect the intake chamber from the exhaust chamber;

(f) A vacuum container enclosure, which comprises;

(i) a first element which is connected to the housing and which encloses the needles that are connected to the exhaust chambers; and

(ii) a second element which contains the lower portions of the vacuum containers, which connects to the first element in a sliding relationship and which is adapted to be slid toward the first element to force the needles into the vacuum containers.

3. A device according to claim 2 in which, for each valve shaft, the first port is located at the end of the shaft.

4. A device according to claim 2 in which at least one element of the vacuum container enclosure contains a detent to hold the elements together when the needles have been forced into the vacuum containers.

5. A device according to claim 2 further comprising a third O ring located so as to form a seal between the exhaust chamber and the exterior of the housing.

6. A device according to claim 2 in which the accommodations are fittings adapted to receive the needles.

7. A body fluid extraction device, comprising:

(a) a housing containing an intake chamber and two exhaust chambers;

(b) first connection means communication with the intake chamber for connecting a hollow hypodermic needle to that chamber;

(c) valve means disposed intermediate the intake chamber and the exhaust chambers, which valve means may be positioned selectively to allow the intake chamber to communicate with each exhaust chamber, and to preclude the intake chamber from communicating with each exhaust chamber; and

(d) second connection means communicating with each exhaust chamber for connecting a vacuum container in a fluid-tight relationship;

(e) in which the valve means comprises a pair of valves, each of which includes a shaft which slides in the central chamber and which includes;

(i) a hollow portion;

(ii) a first port located at a first location on the shaft and a second port located at a second location on the shaft, which ports communicate with each other through the hollow portion of the shaft, and which locations are positioned on the shaft so that they allow the intake chamber to communicate with an exhaust chamber associated with the valve when the valve is in the open position; and

(iii) a pair of O rings positioned on the shaft between the first and second openings to form a closed space between the housing and the shaft, which closed space communicates with the associated exhaust chamber when the valve is in the closed position in order to disconnect the intake chamber from the associated exhaust chamber.