Safety blood collection assembly with indicator

Patent metadata

Field	Value
Publication number	US-10588558-B2
Application number	US-201715601253-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	Mar 7, 2007
Publication date	Mar 17, 2020
Grant date	Mar 17, 2020

Abstract

A needle assembly is disclosed. The needle assembly includes a housing having a flash chamber, and having a distal end and a proximal end engageable with a specimen collection container. The assembly includes a cannula having a patient end, a non-patient end, and a sidewall extending therebetween defining a cannula interior. The patient end of the cannula projects at least partially from the distal end of the housing, and the cannula interior is in fluid communication with the flash chamber. The assembly further includes a shield restrainably engaged with a portion of the housing and axially transitionable over the patient cannula from a retracted position in which the patient end is exposed, to an extended position in which the patient end is shielded by at least a portion of the shield, wherein at least a portion of the flash chamber is visible in the retracted position.

First claim

What is claimed is:

1. A needle assembly, comprising:
a housing comprising a flash chamber, and having a distal end and a proximal end engageable with a specimen collection container;
a cannula having a patient end, a non-patient end, and a sidewall extending therebetween defining a cannula interior, the patient end of the cannula projecting at least partially from the distal end of the housing, the cannula interior in fluid communication with the flash chamber, wherein the flash chamber comprises a viewable cavity into which a specimen flows to provide an early visual indication of venous entry prior to collection of a specimen; and
a shield restrainably engaged with a portion of the housing and axially transitionable over the patient end of the cannula from a retracted position in which the patient end is exposed, to an extended position in which the patient end is shielded by at least a portion of the shield, wherein the shield comprises an opening or a cutaway portion, wherein the opening or cutaway portion is at least partially surrounded by a sidewall defining an observation window and at least a portion of the flash chamber is visible through the observation window when the shield is in the retracted position.

2. The needle assembly of claim 1 , wherein the axially transitionable shield is telescoped over the patient cannula from the retracted position to the extended position.

3. The needle assembly of claim 1 , wherein the patient end of the cannula has a bevel, and a position of the observation window within the shield corresponds to an orientation of the bevel.

4. The needle assembly of claim 1 , wherein the shield at least partially surrounds the patient end of the cannula in the extended position.

5. The needle assembly of claim 1 , wherein the sidewall of the cannula defines an opening extending between the cannula interior and the flash chamber.

6. The needle assembly of claim 1 , wherein the cannula comprises at least two distinct needle portions comprising a distal patient needle having the patient end aligned substantially along a common axis with a proximal non-patient needle having the non-patient end and wherein the distal patient needle and the proximal non-patient needle are separated by a break, wherein the break comprises a space between facing end portions of the distal patient needle and the proximal non-patient needle.

7. The needle assembly of claim 6 , wherein the cannula comprises the patient needle in fluid communication with the flash chamber and the non-patient needle in fluid communication with the flash chamber.

8. The needle assembly of claim 7 , wherein the patient needle projects at least partially from the distal end of the housing, and wherein the non-patient needle extends in a substantially proximal direction from the patient needle.

9. The needle assembly of claim 1 , wherein the flash chamber is integrally formed within an inner portion of the housing.

10. The needle assembly of claim 1 , wherein the housing further comprises a hub supporting at least a portion of the cannula.

11. The needle assembly of claim 10 , wherein the flash chamber is integrally formed with and located within an interior of the hub.

12. The needle assembly of claim 1 , comprising a push button for releasing the shield from the retracted position.

13. The needle assembly of claim 1 , including a sleeve covering the non-patient end of the cannula.

14. The needle assembly of claim 11 , wherein the interior of the hub is defined between a rear hub portion and a forward hub portion.

15. A needle assembly, comprising:
a housing comprising a flash chamber, and having a distal end and a proximal end engageable with a specimen collection container;
a cannula having a patient end, a non-patient end, and a sidewall extending therebetween defining a cannula interior, the patient end of the cannula projecting at least partially from the distal end of the housing, the cannula interior in fluid communication with the flash chamber;
a shield restrainably engaged with a portion of the housing and axially transitionable over the patient end of the cannula from a retracted position in which the patient end is exposed, to an extended position in which the patient end is shielded by at least a portion of the shield, wherein the shield comprises an opening or a cutaway portion, wherein at least a portion of the flash chamber is visible through the shield when the shield is in the retracted position, and wherein the flash chamber comprises a viewable cavity into which a specimen flows to provide an early visual indication of venous entry prior to collection of a specimen; and
a porous vent disposed within the flash chamber, the porous vent separating the flash chamber into a first chamber and a second chamber.

16. The needle assembly of claim 15 , wherein the first chamber and the second chamber are configured such that upon insertion of the patient end into a patient, blood flows through the cannula and into the first chamber without sealing the porous vent, and upon application of an evacuated specimen collection container to the non-patient end of the cannula, blood is drawn from the first chamber and air is drawn from the second chamber, thereby establishing a negative pressure within the second chamber with respect to an external environment of the flash chamber.

17. The needle assembly of claim 16 , wherein the porous vent comprises a plurality of pores for passage of blood therethrough from the first chamber to the second chamber.

18. The needle assembly of claim 17 , wherein the porous vent is at least one of a porous plug formed of a hydrophobic material, a one-way valve, and a porous plug formed of a hydrophilic material that swells on contact with blood.

19. The needle assembly of claim 15 , wherein the flash chamber comprises a vent mechanism in communication with an external environment surrounding the needle assembly.

20. The needle assembly of claim 15 , including a sleeve covering the non-patient end of the cannula.

21. A needle assembly, comprising:
a housing comprising a flash chamber, and having a distal end and a proximal end engageable with a specimen collection container;
a cannula having a patient end, a non-patient end, and a sidewall extending therebetween defining a cannula interior, the patient end of the cannula projecting at least partially from the distal end of the housing, the cannula interior in fluid communication with the flash chamber; and
a shield restrainably engaged with a portion of the housing and axially transitionable over the patient end of the cannula from a retracted position in which the patient end is exposed, to an extended position in which the patient end is shielded by at least a portion of the shield, wherein at least a portion of the flash chamber is visible through the shield when the shield is in the retracted position, wherein the housing comprises a first portion and a second portion, the first portion distal to the second portion, and wherein the shield is entirely disposed within an interior of the first portion in the retracted position, and a specimen collection container receiving port is defined within the second portion.

22. The needle assembly of claim 21 , wherein the first portion and the second portion are co-formed.

23. The needle assembly of claim 21 , wherein the first portion and the second portion are separately formed and subsequently assembled.

24. The needle assembly of

Assignees

• Becton Dickinson Co

Inventors

• Crawford Jamieson W
• Wilkinson Bradley M
• Tan Chee Leong Alvin
• Sim Tiong Yee
• Newby C Mark
• Moh Jon Yaohan
• Ellis Robert G
• Chia Neville Yu Leng
• Bartfeld Benjamin R

Classifications

• A61B5/15003 Primary

  for venous or arterial blood · CPC title

• A61B5/150671

  comprising means to impede repositioning of protection sleeve from covering to uncovering position · CPC title

• A61B5/1422

  provided with indicating means, e.g. for vein entry · CPC title

• A61B5/150595

  by snap-lock (i.e. based on axial displacement) · CPC title

• A61B5/1444

  Safety means, e.g. for locking cannula (removing or disposing of used needles or syringes A61M5/3205) · CPC title