Devices for collecting blood and administering medical fluids

• US 7,662,110 B2
• Filed: 07/30/2003
• Issued: 02/16/2010
• Est. Priority Date: 07/30/2003
• Status: Active Grant

• Current Assignee: One Stick LLC
• Original Assignee: One Stick LLC
• Inventors: Flaherty, Patrice
• Primary Examiner(s): Hindenburg; Max
• Assistant Examiner(s): HOEKSTRA, JEFFREY GERBEN
• Application Number:
  US10/630,402
• Publication Number:
  US 20050027233A1
• Time in Patent Office: 2,393 Days
• Field of Search: 600/576, 600/573, 600/575, 600/578, 600/579, 600/486, 738/638.5, 604/6.11, 604/6.12, 604/97.02, 604/6.16, 604/356, 604/500
• US Class Current: 600/576
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150213 Venting means
• CPC Class Codes: A61B 5/150236 Pistons, i.e. cylindrical bodies that sit inside the syringe barrel, typically with an air tight seal, and slide in the barrel to create a vacuum or to expel blood
• CPC Class Codes: A61B 5/150244 Rods for actuating or driving the piston, i.e. the cylindrical body that sits inside the syringe barrel, typically with an air tight seal, and slides in the barrel to create a vacuum or to expel blood
• CPC Class Codes: A61B 5/150366 Blood collection bags, e.g. connected to the patient by a catheter comprising means for removing a small sample of collected blood from the bag collection bags as such A61J1/05, A61M1/0209
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/150992 Blood sampling from a fluid line external to a patient, such as a catheter line, combined with an infusion line; blood sampling from indwelling needle sets, e.g. sealable ports, luer couplings, valves tubing connectors and couplings A61M39/00
• CPC Class Codes: A61B 5/1535 comprising means for indicating vein or arterial entry A61B5/1545 takes precedence
• 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
• CPC Class Codes: A61M 39/287 Wedge formed by a slot having varying width, e.g. slide clamps
• CPC Class Codes: A61M 5/1407 Infusion of two or more substances

Abstract

Novel devices which can be used to both collect blood samples from and administer medical fluids to a patient on a repeated and continual basis using one rather than multiple needle insertions. The device typically includes a main tubing segment confluently connected to a cannula for insertion in the patient'"'"'s vein. A syringe port and a volumeter for collecting blood branch separately from the main tubing segment. The device is used to collect blood by attaching an empty blood collection syringe to the syringe port, inserting the cannula in the patient'"'"'s vein, allowing passive flow of blood from the main tubing segment into the volumeter under intrinsic venous blood pressure and capillary action, and then facilitating active flow of blood from the volumeter into the blood collection syringe by extending the syringe plunger. The device may be used to administer medical fluids to the patient through the main tubing segment from a medical fluid syringe or catheter attached to the syringe port.

Claims

1. A device for collecting blood from and administering medical fluids to a patient, comprising:

a main tubing segment for conveying the blood and the medical fluids;

an indicator unit and an access port disposed in bidirectional fluid communication with said main tubing segment in branched relationship to each other at a tubing branch, said indicator unit adapted for indicating blood volume;

wherein said indicator unit has a fluid-sealed first end disposed in fluid communication with and proximate said main tubing segment, a second end distal to said main tubing segment relative to said first end, an air flow pathway defined through said indicator unit between said first end and said second end and a bidirectional liquid flow pathway defined in coinciding relationship with said air flow pathway between said first end and said second end;

a clamp operably engaging said main tubing segment and adapted to selectively block and unblock flow of the fluids in both directions through said main tubing segment; and

at least one air-permeable and liquid-impermeable membrane provided at said second end of said indicator unit.

2. The device of claim 1 further comprising a blood volumeter provided in said indicator unit.

3. The device of claim 2 wherein said blood volumeter is a volumeter chamber.

4. The device of claim 3 wherein said indicator unit is disposed in removable fluid communication with said main tubing segment.

5. The device of claim 1 wherein said indicator unit is disposed in removable fluid communication with said main tubing segment.

6. The device of claim 5 further comprising a blood volumeter provided in said indicator unit.

7. A device for collecting blood from and administering medical fluids to a patient, comprising:

a main tubing segment for conveying the blood and the medical fluids;

a blood volumeter having a fluid-sealed first end disposed in fluid communication with and proximate said main tubing segment and a second end distal to said main tubing segment relative to said first end and an access port disposed in fluid communication with said main tubing segment in branched relationship to said blood volumeter, said blood volumeter adapted for indicating blood volume and said blood volumeter and said access port defining branched bidirectional fluid flow pathways;

wherein an air flow pathway is defined through said blood volumeter between said first end and said second end and a bidirectional liquid flow pathway coincides with said air flow pathway between said first end and said second end;

a clamp operably engaging said main tubing segment and adapted to selectively block and unblock flow of the fluids in both directions through said main tubing segment; and

at least one air-permeable and liquid-impermeable membrane disposed in fluid communication with said blood volumeter at said second end of said blood volumeter and allowing bidirectional fluid movement between said blood volumeter and said access port.

8. The device of claim 7 wherein said blood volumeter is disposed in removable fluid communication with said main tubing segment.

9. The device of claim 7 wherein said blood volumeter is a volumeter chamber.

10. The device of claim 9 wherein said indicator unit is disposed in removable fluid communication with said main tubing segment.

11. A device for collecting blood from and administering medical fluids to a patient, comprising:

a main tubing segment for conveying the blood and the medical fluids;

an indicator unit having a fluid-sealed first end disposed in fluid communication with and proximate said main tubing segment, a second end distal to said main tubing segment relative to said first end, an air flow pathway extending through said indicator unit between said first end and said second end and a bidirectional liquid flow pathway coinciding with said air flow pathway between said first end and said second end;

an access port disposed in bi-directional fluid communication with said main tubing segment in branched relationship to said main tubing segment and said indicator unit at a tubing branch, said indicator unit having a blood volumeter between said first end and said second end of said indicator unit and adapted for indicating blood volume and said indicator unit and said access port defining branched bi-directional fluid flow pathways;

a clamp operably engaging said main tubing segment and adapted to block and unblock flow of the fluids in both directions through said main tubing segment;

at least one air-permeable and liquid-impermeable membrane provided at said second end of said indicator unit; and

wherein said at least one air-permeable and liquid-impermeable membrane allows bidirectional fluid movement between and through said blood volumeter and said access port.

12. The device of claim 11 further comprising a connector provided in fluid communication with said main tubing segment and wherein said indicator unit is disposed in removable fluid communication with said connector.

13. The device of claim 11 wherein said blood volumeter is a volumeter chamber.

14. The device of claim 11 further comprising a collector conduit provided in fluid communication with said main tubing segment and wherein said indicator unit is disposed in fluid communication with said collector conduit.

15. The device of claim 14 wherein said indicator unit comprises a volumeter conduit provided in fluid communication with said collector conduit and wherein said blood volumeter is provided in fluid communication with said volumeter conduit.

16. The device of claim 15 further comprising a port disposed between said collector conduit and said volumeter conduit.

17. The device of claim 11 further comprising an access port tubing segment provided in fluid communication with said main tubing segment and wherein said access port is provided on said access port tubing segment.

18. The device of claim 11 further comprising a connector provided in said main tubing segment between said clamp and said tubing branch.

19. The device of claim 11 wherein said tubing branch comprises an access port leg and a collector tubing leg communicating with said main tubing segment and wherein said access port communicates with said access port leg and said indicator unit communicates with said collector tubing leg.