Decompression Needle Assembly

Abstract

The present invention is a decompression needle assembly having a needle that is removable received into to a catheter. The catheter can include a rigid portion and a deformable portion wherein the deformable portion can be multi-ported at its distal end. A one-way valve contained in a catheter hub attached to the catheter wherein the one way valve is in an open position when the needle is received in the catheter. Lateral catheter openings can be defined in the catheter and disposed adjacent to a distal end of the catheter. A plunger can be received within the needle and have an visual and auditory indicator that can be appreciated through the needle hub.

Claims

1. A decompression needle assembly comprising: a housing having a removable housing cap; a catheter having a catheter hub; a lock tab attached to a rear portion of the catheter hub; a rear catheter opening defined in the catheter hub; a one-way valve included in the catheter hub at a one-way valve portion of the catheter hub; a needle received in the catheter and extending through the one way valve placing the one way valve in an open position; a needle hub attached to the needle having a lock collar rotatably attached to the needle hub for engaging with the lock tab to secure the needle hub to the catheter hub; a needle hub extension configured to be received in rear catheter hub opening when the needle hub is attached to the catheter hub; and, a storage position wherein the needle and catheter are attached and received in the housing so that the catheter hub is received in the housing and the lock collar extend from the housing.

2. The assembly of claim 1 including threads defined in the lock collar on an interior side and configured to engage with the lock tab.

3. The assembly of claim 1 including catheter ridges included in the catheter hub.

4. The assembly of claim 1 including a catheter annular ring included in the catheter hub.

5. The assembly of claim 1 including a curve at a distal end of the catheter.

6. The assembly of claim 1 including lateral openings defined in the catheter and disposed adjacent to the distal end of the catheter.

7. The assembly of claim 1 including a flash chamber defined by the cannula hub and lock collar.

8. The assembly of claim 1 where in the needle hub is transparent.

9. The assembly of claim 1 wherein the lock collar is transparent.

10. The assembly of claim 1 wherein the catheter is in a straight position when the needle is received on the catheter and a curved position when the needle is removed from the catheter.

11. The assembly of claim 1 wherein the catheter includes a rigid portion and a deformable portion wherein the deformable portion is disposed at the catheter distal end.

12. The assembly of claim 1 including: a first flow path that extends from the distal end of the needle, through the needle, and out of the needle hub when the needles received on the catheter; and, a second flow path that extends from the distal end of the catheter, through the one-way valve and outof the catheter hub when the needle is removed from the catheter.

13. The assembly of claim 1 wherein the one-way valve includes a first open position when the needle is received on the one-way valve, a second open position when pressure from the distal end of the catheter opens the one-way valve and a closed position when negative pressure in the pleural space attempts to draw air or fluid through the catheter into the pleural space.

14. A decompression needle assembly comprising: a catheter having a catheter hub; a lock tab attached to a rear portion of the catheter hub; a one-way valve included in the catheter hub at a one-way valve portion of the catheter hub allowing fluid to travel from a distal end of the catheter to the catheter hub; a cannula received in the catheter and extending through the one way valve; and, a cannula hub attached to the needle removably attached to the catheter hub.

15. The assembly of claim 14 including a lock collar rotatable and attached to the needle hub.

16. The assembly of claim 14 including a curve at a distal end of the catheter.

17. The assembly of claim 14 including lateral openings defined in the catheter and disposed adjacent to the distal end of the catheter.

18. The assembly of claim 14 wherein the catheter is in a straight position when the needle is received in the catheter and a curved position when the needle is removed from the catheter.

19. The assembly of claim 14 wherein the catheter includes a rigid portion and a deformable portion wherein the deformable portion is disposed at the catheter distal end.

20. A decompression needle assembly comprising: a removable needle received into and removably secured to a catheter, the catheter including a rigid portion and a deformable portion wherein the deformable portion is disposed at a distal end of the catheter; a one-way valve included in the catheter and contained in a catheter hub wherein the one way valve is in an open position when the needle is received in the catheter; lateral openings defined in the catheter and disposed adjacent to a distal end of the catheter; and, wherein the distal end of the catheter is in a straight position when the needle is received in the catheter and a curved position when the needle is removed from the catheter.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0022] The details of the present invention, both as to its structure and operation, are understood in part by study of the accompanying drawings which are referenced herein and in which like reference numerals refer to like parts and where:

[0023] FIG. 1 is a side view of aspects of the invention;

[0024] FIG. 2 is a side view of aspects of the invention;

[0025] FIG. 3 is a side view of aspects of the invention;

[0026] FIG. 4 is a side view of aspects of the invention; and,

[0027] FIG. 5 is a side view of aspects of the invention.

DETAILED DESCRIPTION OF THE INVENTION

[0028] Referring to FIG. 1, the decompression needle assembly 10 including a catheter 12 that has an outward flow path defined from the distal end of the catheter to the proximal end of the catheter. The catheter hub 14 is attached to proximal end of the catheter. A rear portion 16 of the catheter hub can be attached to the catheter hub or included in the catheter hub. The rear portion of the catheter hub include one or more lock tabs 20 (FIG. 3) that extends laterally from the catheter hub perpendicular to the outward flow path. A one-way valve 22 is disposed within the catheter hub and opens when pressure is applied along the flow path and prevents fluid flow in a direction opposite the flow path.

[0029] A needle 24 can be received in the catheter from the proximal end and pass through the one-way valve and extend from the distal end of the catheter. The needle can include a needle hub 26 that includes a flash chamber 21 to assist in indicating when the needle has been properly inserted into a patient. This indication may be auditory (such as a click) or visual. A lock collar 18 can be included in the catheter hub and attached to the forward portion of the catheter hub adjacent to the catheter when the catheter and cannula are assembled. In one embodiment, the temporary lock collar can rotate about needle hub and engage the lock tabs to attach or disarticulate the needle hub to or from the catheter hub. The lock collar can include internal threads that engage or disengage the tabs to secure or release the needle to or from the catheter.

[0030] In the manufacturer of the assembly, the needle can extend through the one-way valve positioning the one-way valve in an open position. When the needle is removed from the catheter, the one-way valve closes and only opens when fluid flow is in the direction of the fluid flow path. As such, the needle cannot be re-inserted into the catheter, providing additional safety against contamination and mitigating further injury to the patient.

[0031] In operation, the needle and catheter assembly is removed from the housing and inserted into the patient. The needle and catheter are inserted into the skin 100 between ribs 104 and 106 until the assembly enters the pleural space 108. In one embodiment, depth markings or color coding, along the length of the catheter, can assist the provider with the depth recognition and procedural safety during the insertion process. Intra-thoracic pressure can be relieved from the pleural space before the needle is removed. The needle is removed, leaving the catheter in position, and the lung 110 may begin to re-inflate once pressure in the pleural space is relieved and begins to travel in direction 112.

[0032] Referring to FIG. 2, the catheter is shown once the needle is removed. Distal end of the catheter 40 is shown in the pleural space. As the lung begins to inflate and expand into a direction shown as 112. In one embodiment, the distal end of the catheter includes a semi-flexible curve or “pig-tail” 44 such that the distal end of the catheter curves away from the lung. When the lung inflates and expands in direction 112, the lung can contact the curved portion causing the distal end of the catheter to further flex away from the lung preventing the catheter's distal opening from being blocked by the expanding lung. Additionally, the lateral openings 42a through 42d can be included near the distal end of the catheter to allow fluid to travel along the flow path even if the catheter's distal opening is obstructed. When the needle is received by the catheter, the catheter is straightened by the needle allowing the catheter to be inserted into the patient, and to be received into and stored in its housing.

[0033] In one embodiment, the flash chamber is transparent to allow for fluid to be seen when the needle is properly placed in the pleural space. Continuity between the distal and proximal ends further allows for an auditory indication of proper placement. In one embodiment, the lock collar is also transparent to allow for fluid to be seen when the needle is properly placed on the pleural space.

[0034] Referring to FIG. 3, the needle hub can include a needle hub extension 34 that can be received in the rear of the catheter hub 36. The catheter hub can include ridges 28 to assist with grasping the catheter hub. A catheter hub annular ring 30 can be included in the catheter hub to assist with grasping and inserting the assembly. A one-way valve portion 46 of the catheter hub can include the one-way valve. The one-way valve is held in the open position by the needle when the needle extends through the one-way valve. When the needle is removed, valve 50 closes preventing air/fluid from flowing in a direction shown as 52. The one-way valve can be secured by the valve base 48 that is secured to the one-way valve portion of the catheter hub.

[0035] In one embodiment, the needle hub 26 includes a bore extending through the needle hub and is in fluid communications with the bore of the needle allowing fluid to travel from the distal end of the needle to the needle hub. A semi-porous audio cap can be attached to the needle hub to enhance insertion recognition at the proximal end of the needle hub.

[0036] Referring to FIG. 4, the decompression needle assembly is shown received in housing 54 and covered by housing cap 52. In one embodiment, the one way valve portion 22 is received into the housing providing additional protection to the one-way valve. The lock collar and needle hub extend above the housing when the decompression needle assemble is received in the housing and the housing cap is removed. In one embodiment, the locking collar is received on the housing to provide additional protection to the lock collar. When the needle hub is pulled away from the housing, with the housing cap removed, the lock collar is facilitates the catheter hub resulting in the catheter hub and catheter being removed from the housing as well. By having an in-line one way valve, catheter hub locked to a needle hub, straightened distal end of the catheter, the decompression needle assembly can be stored in a single, all-inclusive, and compact configuration allowing many units to be carried by a first responder. Additionally, the operator, such as law enforcement, a war fighter, or fireman can carry one unit usable by the provider to treat a tension pneumothorax without the addition of unacceptable weight or bulk to the provider or operator's equipment. By having the housing and housing cap designed as shown with the decompression needle assembly stored as described, the first responder or provider can quickly remove the housing cap and remove the decompression needle assembly without reliance on fine motor skills.

[0037] Referring to FIG. 5, one embodiment is shown with the a safety indicator for assisting with insertion of the needle and catheter assembly 24 to the proper depth. A plunger 114 is received into the needle and can extend into the needle hub 26. The plunger can be hollow in one embodiment. The needle hub can be transparent so that the depth indicator 116 can be seen through the needle hub. When the needle is inserted into the patient, the indicator (colored in one embodiment) is initially positioned to the top of the needle hub in area 118. This results from the plunger being pressed upward toward the needle hub when the plunger contacts the skin. When the needle enters the pleural space above the lung, the plunger returns to its resting position. This results in movement of the indicator and can produce an auditory “click” , biased by spring 120, which has return to an area at the bottom of the needle hub shown as 122. If the plunger contacts the lung, the plunger is forced upwards and the indicator also moves upward indicating that the downward force on the needle should be halted. Once the assembly is properly inserted, the needle can be removed thereby leaving the catheter and creating a flow path for fluid from the pleural space to the environment allowing the pressure in the pleural space to be relieved. Therefore, the described indicator can assist the provider with insertion and possibly prevent improper insertion of the needle set susequently damaging the lung tissue.

[0038] While the invention has been described in connection with a preferred embodiment, it is not intended to limit the scope of the invention to the particular form set forth, but on the contrary, it is intended to cover such alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.

[0039] Unless specifically stated, terms and phrases used in this document, and variations thereof, unless otherwise expressly stated, should be construed as open ended as opposed to limiting. Likewise, a group of items linked with the conjunction “and” should not be read as requiring that each and every one of those items be present in the grouping, but rather should be read as “and/or” unless expressly stated otherwise. Similarly, a group of items linked with the conjunction “or” should not be read as requiring mutual exclusivity among that group, but rather should also be read as “and/or” unless expressly stated otherwise.

[0040] Furthermore, although items, elements or components of the disclosure may be described or claimed in the singular, the plural is contemplated to be within the scope unless limitation to the singular is explicitly stated. The presence of broadening words and phrases such as “one or more,” “at least,” “but not limited to” or other like phrases in some instances shall not be read to mean that the narrower case is intended or required in instances where such broadening phrases may be absent.