Safety blood collection assembly with indicator

Patent metadata

Field	Value
Publication number	US-11020033-B2
Application number	US-201816117167-A
Country	US
Kind code	B2
Filing date	Aug 30, 2018
Priority date	Mar 7, 2007
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

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 front hub portion and a rear hub portion with a flash chamber defined therebetween, the housing 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 engaged with a portion of the housing and comprising a locking structure, the shield transitionable from a first position to a second position with respect to the housing, wherein the flash chamber includes a top surface which is free from obstructions on the flash chamber and is visible when the shield is in the first position, and wherein the shield is disposed over the patient end of the cannula and the locking structure engages at least one ledge located on the front hub portion when the shield is in the second position.

2. The needle assembly of claim 1 , wherein the shield includes an engagement member for pivotally connecting the shield to the housing and wherein the shield includes at least one depending arm having a locking structure associated therewith, said locking structure disposed at a location distal from the engagement member.

3. The needle assembly of claim 2 , wherein the locking structure engages the at least one ledge at a distal end of the front hub portion.

4. The needle assembly of claim 3 , wherein the locking structure engages the at least one ledge at a location distal to the flash chamber.

5. The needle assembly of claim 1 , wherein the locking structure comprises at least two inwardly angled restraints, each restraint including a sloped surface and a restraining surface, and the front hub portion comprises at least two corresponding ledges, wherein each restraining surface contacts the corresponding ledge when the shield is in the second position.

6. The needle assembly of claim 1 , wherein the shield includes a shield engaging area having a connection surface adjacent a proximal end of the shield and wherein the shield engaging area has a contour substantially corresponding to a contour of an exterior surface of a needle holder and wherein when the shield is located in the first position, the shield engaging area rests against the exterior surface of the needle holder to allow an unobstructed view of the flash chamber.

7. The needle assembly of claim 1 , wherein the shield is dimensioned so as to be pivotable away from an axis of the cannula in a first position to a sufficient angle to allow an unobstructed view of the flashback chamber.

8. The needle assembly of claim 1 , wherein the cannula includes a bevel having an angled surface and the shield includes an angled surface and wherein the angled surface of the bevel and the angled surface of the shield are in alignment with a longitudinal axis of the cannula when the shield is in the first position to assist in the orientation of the cannula with respect to the patient during use.

9. The needle assembly of claim 8 , wherein the angled surface of the shield allows for an unobstructed view of the flash chamber when the shield is in the first position.

10. The needle assembly of claim 1 , including a removable needle shield covering at least a portion of the cannula, the front hub portion, and the flash chamber.

11. A blood collection assembly, comprising:
a housing, comprising a flash chamber, the housing 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 including an engagement member connecting the shield to the housing and at least one depending arm having a locking structure associated therewith, wherein the locking structure comprises at least one inwardly angled restraint and is disposed at a location on the shield that is distal from the engagement member, the shield being transitionable from a first position to a second position with respect to the housing,
wherein the flash chamber includes a top surface which is free from obstructions on the flash chamber and is visible when the shield is in the first position, and wherein, in the second position, the shield is disposed over the patient end of the cannula and the locking structure engages at least one ledge located at the distal end of the housing to lock the shield in the second position, the engagement of the locking structure and the at least one ledge being distal to the engagement member.

12. The blood collection assembly of claim 11 , wherein the locking structure engages the at least one ledge at a location distal to the flash chamber.

13. The blood collection assembly of claim 11 , wherein the locking structure comprises a least two inwardly angled restraints, each restraint including a sloped surface and a restraining surface, and the housing comprises at least two corresponding ledges, wherein each restraining surface contacts the corresponding ledge when the shield is in the second position.

14. The blood collection assembly of claim 11 , wherein the shield includes a shield engaging area having a connection surface adjacent a proximal end of the shield and wherein the shield engaging area has a contour substantially corresponding to a contour of an exterior surface of a needle holder and wherein when the shield is located in the first position, the shield engaging area rests against the exterior surface of the needle holder to allow an unobstructed view of the flash chamber.

15. The blood collection assembly of claim 11 , wherein the shield is dimensioned so as to be pivotable away from an axis of the cannula in a first position to a sufficient angle to allow an unobstructed view of the flash chamber.

16. The blood collection assembly of claim 11 , wherein the cannula includes a bevel having an angled surface and the shield includes an angled surface and wherein the angled surface of the bevel and the angled surface of the shield are in alignment with a longitudinal axis of the cannula when the shield is in the first position to assist in the orientation of the cannula with respect to the patient during use.

17. The blood collection assembly of claim 16 , wherein the angled surface of the shield allows for an unobstructed view of the flash chamber when the shield is in the first position.

18. A needle assembly, comprising:
a housing, comprising a front hub portion and a rear hub portion with a flash chamber defined therebetween, the housing 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, the cannula including a bevel having an angled surface; and
a shield engaged with a portion of the housing, the shield including an angled surface, wherein the angled surface of the bevel and the angled surface of the shield are in alignment with a longitudinal axis of the cannula when the shield is in a first position to assist in the ori

Assignees

• Becton Dickinson Co

Inventors

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

Classifications

• A61B17/34

  Trocars; Puncturing needles · CPC title

• A61B5/150389

  Hollow piercing elements, e.g. canulas, needles, for piercing the skin · CPC title

• A61B5/154 Primary

  {Devices} using pre-evacuated means · CPC title

• A61B5/15003 Primary

  for venous or arterial blood · CPC title

• A61B5/153

  {Devices} specially adapted for taking samples of venous or arterial blood, e.g. with syringes · CPC title