NZ734684B2 - Multiple needle injector - Google Patents
Multiple needle injector Download PDFInfo
- Publication number
- NZ734684B2 NZ734684B2 NZ734684A NZ73468416A NZ734684B2 NZ 734684 B2 NZ734684 B2 NZ 734684B2 NZ 734684 A NZ734684 A NZ 734684A NZ 73468416 A NZ73468416 A NZ 73468416A NZ 734684 B2 NZ734684 B2 NZ 734684B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- needles
- hub
- needle
- fluid
- end portion
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims abstract description 67
- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 229940035295 Ting Drugs 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 23
- 210000001519 tissues Anatomy 0.000 abstract description 23
- 210000000481 Breast Anatomy 0.000 abstract description 14
- 238000007920 subcutaneous administration Methods 0.000 abstract description 10
- 239000007943 implant Substances 0.000 abstract description 5
- 230000003247 decreasing Effects 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 description 8
- 210000003491 Skin Anatomy 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 5
- 210000003813 Thumb Anatomy 0.000 description 4
- 230000004931 aggregating Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 238000001802 infusion Methods 0.000 description 3
- VREFGVBLTWBCJP-UHFFFAOYSA-N Alprazolam Chemical compound C12=CC(Cl)=CC=C2N2C(C)=NN=C2CN=C1C1=CC=CC=C1 VREFGVBLTWBCJP-UHFFFAOYSA-N 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 2
- 229940090047 Auto-Injector Drugs 0.000 description 2
- 206010006187 Breast cancer Diseases 0.000 description 2
- XQFRJNBWHJMXHO-RRKCRQDMSA-N IDUR Chemical compound C1[C@H](O)[C@@H](CO)O[C@H]1N1C(=O)NC(=O)C(I)=C1 XQFRJNBWHJMXHO-RRKCRQDMSA-N 0.000 description 2
- 229960004716 Idoxuridine Drugs 0.000 description 2
- 230000037005 anaesthesia Effects 0.000 description 2
- 230000002146 bilateral Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 210000001015 Abdomen Anatomy 0.000 description 1
- 206010003246 Arthritis Diseases 0.000 description 1
- 230000036536 Cave Effects 0.000 description 1
- 208000008313 Contusions Diseases 0.000 description 1
- 229940084430 Four-Way Drugs 0.000 description 1
- 206010022114 Injury Diseases 0.000 description 1
- 206010069217 Needle issue Diseases 0.000 description 1
- 210000000614 Ribs Anatomy 0.000 description 1
- 210000004304 Subcutaneous Tissue Anatomy 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000002316 cosmetic surgery Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229920005994 diacetyl cellulose Polymers 0.000 description 1
- 201000009910 diseases by infectious agent Diseases 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3468—Trocars; Puncturing needles for implanting or removing devices, e.g. prostheses, implants, seeds, wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00743—Type of operation; Specification of treatment sites
- A61B2017/00796—Breast surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/02—Devices for expanding tissue, e.g. skin tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/12—Mammary prostheses and implants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0003—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having an inflatable pocket filled with fluid, e.g. liquid or gas
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2206/00—Characteristics of a physical parameter; associated device therefor
- A61M2206/10—Flow characteristics
- A61M2206/20—Flow characteristics having means for promoting or enhancing the flow, actively or passively
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3293—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles characterised by features of the needle hub
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3295—Multiple needle devices, e.g. a plurality of needles arranged coaxially or in parallel
- A61M5/3298—Needles arranged in parallel
Abstract
improved injector needle apparatus is described with inherent properties for increasing linear flow rates when inserted into a subcutaneous port during tissue expansion thus decreasing procedure time. We disclose herein a fluid injector apparatus for injecting fluid through a plurality of needles into a subcutaneous port during tissue expansion comprising a base, tubing connecting the needles, and a base fluid injection system to increase linear flow velocity and decrease procedure time. The problem of how to increase the speed of filling the breast expander or implant is addressed by providing an injection device with several small needles instead of the single small needle. This increases flow with reduced chance of leakage. into a subcutaneous port during tissue expansion comprising a base, tubing connecting the needles, and a base fluid injection system to increase linear flow velocity and decrease procedure time. The problem of how to increase the speed of filling the breast expander or implant is addressed by providing an injection device with several small needles instead of the single small needle. This increases flow with reduced chance of leakage.
Description
(12) Granted patent specificaon (19) NZ (11) 734684 (13) B2
(47) Publicaon date: 2021.12.24
(54) MULTIPLE NEEDLE INJECTOR
(51) Internaonal Patent Classificaon(s):
A61M 5/00 A61M 5/158
(22) Filing date: (73) s):
2016.03.10 Allergan Sales, LLC
(23) Complete specificaon filing date: (74) Contact:
2016.03.10 DAVIES COLLISON CAVE PTY LTD
(30) Internaonal Priority Data: (72) Inventor(s):
US 62/131,064 2015.03.10 UNGER, Jacob G.
(86) Internaonal aon No.:
(87) aonal Publicaon number:
WO/2016/145230
(57) Abstract:
An improved injector needle apparatus is described with inherent properes for increasing linear
flow rates when inserted into a subcutaneous port during ssue expansion thus decreasing
procedure me. We disclose herein a fluid injector tus for injecng fluid through a plurality
of needles into a subcutaneous port during ssue ion comprising a base, tubing connecng
the needles, and a base fluid injecon system to increase linear flow velocity and decrease
procedure me. The problem of how to increase the speed of filling the breast expander or
t is addressed by providing an injecon device with several small needles instead of the
single small . This increases flow with reduced chance of leakage.
NZ 734684 B2
MULTIPLE NEEDLE INJECTOR
REFERENCES TO RELATED APPLICATIONS
This application claims the benefit of US. Provisional Application
No. 62/131,064, filed March 10, 2015, which is incorporated herein by nce in its
entirety.
FIELD OF THE INVENTION
The present invention is generally directed to an apparatus using a
plurality of s to se flow rates during tissue expansion and injection of fluids into
subcutaneous tissue and the method thereof.
BACKGROUND OF THE INVENTION
Breast reconstruction is one of the most common procedures
performed in plastic surgery today. One out of eight women will have breast cancer in their
me, the majority of whom will undergo reconstruction. Currently federal law mandates
that any woman who has breast cancer must be offered reconstruction. Last year 96,000
breast reconstructions were performed, the vast majority of which were expander implant
based reconstructions. Of note, many cases are bilateral, and therefore over 100,000
expanders are being utilized in breast reconstruction ever year.
The typical breast reconstruction process es placing a deflated
tissue expander in the chest pocket after mastectomy (breast removal). The expander
includes a port through which sterile saline can be forced, causing the volume of the
expander to increase. The expander is usually filled with sterile saline in the operating
room prior to closing the surgical opening in the skin. The patient then returns to the clinic
two weeks later for further expansion. Because the port is covered by skin, the port is
d with the aid of a port locator magnet. Once it is located, a needle is placed through
the skin into the port and sterile saline is injected. This procedure is done on a weekly basis
until the skin envelope is expanded to a large enough size to accommodate the desired
implant size for an appropriately sized breast mound. Typically, the expansion procedure is
performed four to eight separate times prior to being ready for the er/implant
exchange.
This procedure is not limited to breast reconstruction. Tissue
expanders are also used in burn reconstruction and various other types of reconstruction
where skin expansion is needed.
The most pressing issue associated with breast and other types of
tissue expansion is the exceedingly narrow needle used in current systems, such as the
NIENTOR brand winged infusion set, as compared to the pipe diameter of the rest of the
system. The entire system is bottlenecked by the 21 gauge needle that is used to inject the
port. The inner er of the needle is 0.51 mm (outer er 0.81mm), which is the
maximum allowable gauge needle per the cturer ctions (see s t
Website) due to the nature of the port. Narrow needles result in slow flow of sterile saline,
and require more time to fill the tissue expander. The filling process in the operating room
can be as long as 10 to 15 minutes during which time the surgeons and nurse must patiently
21189653.1:DCC -16/06/2021
wait for the expander to fill with the t still open. Simply a larger needle would core
out the ne and make the port leak, and thus fail.
SUMMARY OF THE ION
We disclose herein a fluid injector apparatus for injecting fluid
through a plurality of needles into a subcutaneous port during tissue expansion comprising
a base, tubing connecting the needles, and a base fluid injection system to increase linear
flow velocity and decrease procedure time.
We also disclose a method of injecting fluid through a plurality of
needles into a subcutaneous port during tissue expansion comprising a base, tubing
connecting the needles, and a base fluid injection system to increase linear flow velocity and
decrease procedure time.
[0008a] According to a first aspect, the present disclosure provides a fluid
injection device comprising: a plurality of needles; a hub having a first end portion and a
second end n, a plurality of needle bases at the second end portion, and a directing
cone extending from the second end portion with the plurality of needle bases at least
partially surrounding the directing cone, the directing cone ng in a direction away from
the first end n for diverting flow toward the plurality of needle bases, each of said
plurality of needles being in fluid communication with a respective one of the plurality of
needle bases and projecting from said first end portion of the hub; and a base component,
separate from and couplable to a second end portion of the hub, the directing cone extending
into a cavity of the base ent when coupled o, upstream of the plurality of needle
bases, the base component comprising an inlet for connecting the device to a fluid source.
[0008b] According to a second aspect, the present disclosure provides a fluid
injection device comprising a hub and a base component, the hub having a first end n,
a second end portion, and a plurality of needle bases formed along the said second end
portion, wherein said first end portion is configured to receive a plurality of needles to permit
the plurality of needles to project from said first end portion of the hub such that, when
received by the first end n, each of the plurality of needles is in fluid communication
with a respective needle base, the hub further
21189653.1:DCC -16/06/2021
comprising a directing cone (i) being angled toward the needle bases and (ii) having a tapered
shape, the needle bases being arranged around the directing cone to promote laminar flow
of a fluid along the directing cone toward the needle bases, the base component being
te from and couplable to a second end portion of the hub, the directing cone extending
into a cavity of the base component when coupled thereto, upstream of the plurality of needle
bases, the base component comprising an inlet for connecting the device to a fluid source.
[0008c] According to a third aspect, the present disclosure provides a method
of increasing fluid flow into an injection port of a tissue expander comprising the steps of:
a. providing a hub and a base component coupled to a tubing attached to a fluid
source, wherein said hub has a first end portion from which a plurality of
needles project outward and a second end portion configured to e fluid
from the tubing, each of the plurality of needles being in fluid communication
with a needle base formed along said second end portion, the hub further
comprising a ing surface (i) being angled toward and at least partially
surrounded by the needle bases and (ii) having a tapered shape to promote
laminar flow of a fluid toward the needle bases, the base ent being
separate from and couplable to a second end portion of the hub, the directing
surface ing into a cavity of the base component when coupled thereto,
upstream of the plurality of needle bases; and
b. pushing fluid through said tubing such that said fluid passes through the hub
and into each of the plurality of s.
[0008d] According to a fourth , the present disclosure es a method
for delivering fluid subcutaneously comprising the steps of:
a. providing a hub and a base component coupled to a tubing attached to a fluid
source, n said hub has a first end portion from which a plurality of
hypodermic needles project outward and a second end portion configured to
receive fluid from the tubing, each of the plurality of hypodermic needles
being in fluid communication with a needle base formed along said second
end portion, the hub further comprising a ing surface (i) being angled
toward and at least partially surrounded by the needle bases and (ii) having a
tapered shape to promote laminar flow of a fluid toward the needle bases, the
21189653.1:DCC -16/06/2021
base component being separate from and couplable to a second end portion
of the hub, the directing surface extending into a cavity of the base component
when coupled thereto, upstream of the plurality of needle bases;
b. inserting said hypodermic s under the skin; and
c. pushing fluid through said tubing such that said fluid passes through the hub
and into each of the plurality of hypodermic needles.
] According to a fifth aspect, the present disclosure provides a fluid
injection device comprising: a hub having a first end portion, a second end portion, and a
directing cone extending from the second end portion, a plurality of needle bases in the hub,
and a plurality of needles each being in fluid ication with a tive needle base
of the plurality of needle bases and projecting from the first end portion of the hub, the
plurality of needle bases being disposed at the second end portion and at least partially
surrounding the directing cone, the directing cone tapering in a direction away from the first
end portion for diverting flow toward the plurality of needle bases; and a base component,
separate from and couplable to the second end portion of the hub such that when coupled
thereto, the hub directing cone extends into a cavity of the base component upstream of the
plurality of needle bases, the base component sing an inlet for connecting the device
to a fluid source.
[0008f] According to a sixth aspect, the present disclosure provides a fluid
injection device comprising:
a plurality of needles each being in fluid communication with a respective needle base;
a hub having a first end portion, a second end portion, the first end portion being ured
to receive the plurality of needles to permit the plurality of s to project from the first
end portion of the hub, the needle bases being formed along the second end portion, the hub
further comprising a ing cone having a tapered shape and being angled toward the
plurality of needle bases, the plurality of needle bases being arranged along the directing
cone to promote laminar flow of a fluid along the ing cone toward the plurality of
needle bases; and
21189653.1:DCC -16/06/2021
a base component being separate from and couplable to a second end portion of the hub, the
directing cone extending into a cavity of the base component upstream of the needle bases
when coupled thereto, the base component comprising an inlet for connecting the device to
a fluid source.
BRIEF DESCRIPTION OF THE DRAWINGS
Further advantages of the invention will become apparent by
reference to the detailed description of red embodiments when considered in
ction with the drawings:
is a top plan view of the multiple injector needle apparatus.
is a front view of the multiple injector needle apparatus.
is a front view of a c sleeve for needle protection.
3C (followed by page 4)
is a perspective view of the multiple injector needle apparatus.
is a top plan view of the multiple or needle apparatus.
-6D are views of an embodiment of the multiple injector
needle apparatus. ndently, is a perspective view of the hub of the apparatus.
is a cross-sectional view of the multiple injector needle apparatus. is a top
plan view of the hub of the apparatus. is a cross sectional view of the hub of the
apparatus taken along the line 6D-6D of ..
-7D are views of an embodiment of the le injector
needle apparatus. Independently, is a perspective view of the hub of the apparatus.
is a top plan view of the hub of the apparatus. is a cross-sectional view of
the aggregating cone of the apparatus taken along the line 7C-7C of . is a
cross—sectional view of the aggregating cone of of the tus at increased
magnification.
-8C are views of an embodiment of the apparatus with
needles inserted into the hub. Independently, is a perspective view of the hub of
the apparatus. is a right side view of the hub of the apparatus. is a cross-
sectional view of the s and hub of the apparatus.
-9C are views of an ment of the apparatus with
needles inserted into the hub. Independently, is a perspective view of the hub of
the apparatus. is a right side view of the hub of the apparatus. is a cross—
sectional view of the aggregating cone of the apparatus.
is a cross sectional view of an embodiment of the hub of the
apparatus.
is a cross sectional view of an embodiment of the hub of the
apparatus with needles inserted.
DETAILED DESCRIPTION
The following detailed description is ted to enable any person
skilled in the art to make and use the ion. For purposes of explanation, specific details
are set forth to provide a thorough understanding of the present invention. However, it will
be apparent to one d in the art that these specific details are not required to practice the
ion. Descriptions of specific applications are provided only as representative
examples. Various modifications to the preferred embodiments will be readily apparent to
one skilled in the art, and the l principles defined herein may be applied to other
embodiments and applications t departing from the scope of the invention. The
present ion is not intended to be limited to the embodiments shown, but is to be
accorded the widest possible scope consistent with the principles and features disclosed
To overcome the issue of the slow flow through a single injection
needle, our invention uses a plurality of needles. The typical injection port is nearly 3cm in
diameter. So, while a large single needle would cause failure, multiple small needles can
easily be placed into the silicone dome at the same time without breaking the seal. The
present invention (as pictured in would solve the exceedingly small needle issue by
allowing for a four (4) times se in the flow ty as compared to the current
standard and sole existing option by allowing a plurality of separate needles contained
within one construct at the end of butterfly tubing thus resulting in immense time savings in
the operating room as well as the clinic.
We disclose herein such an apparatus that allows for increased flow
rate of fluids into a tissue expander. The apparatus has multiple needles that can be
simultaneously inserted into the port, thus allowing more fluid to flow into the expander.
As a result of the increased flow, the time to fill the tissue expander is significantly reduced.
Referring to the drawings, illustrates the le needle
tus 1 consisting primarily of needles 2 projecting outward from a hub 5 and tubing 4
for ting the hub to a fluid source.
The needles 2 project from the first end (injection side) of the hub 5
such that they are substantially parallel to each other. As shown in and the
needles are spaced such that all of them can simultaneously enter the injection port on the
breast tissue expander. In the example shown, the needles are spaced no more than five (5)
millimeters across. The needles 2 may be shorter than currently used needles, or they may
have ultra—thin walls, thus reducing the pressure required for increased flow of fluid into the
tissue expander. Any type and sized of needle that allows the flow of liquid may be used in
the device, although in a preferred embodiment, a rd rmic will be used in the
tus 1.
It should be appreciated that any size hub 5 may be selected to
accommodate a plurality of needles. In the embodiments depicted in the hub 5 may
be as large as three (3) centimeters in diameter or as small as one-quarter (0.25) of a
centimeter in diameter. Also, the needles may be secured into the hub by pressure as shown
in — 8C or d into the hub by glue as shown in — 9C.
Opposite the needle side of the hub 5 lies the second end 6 of the hub.
The second end 6 is configured to receive IV tubing. In the example shown, butterfly IV
tubing would connect to the second end 6. As shown in , the hub 5 ideally would
be made of plastic, and would have plastic handles 7 that would aid in the insertion of the
needles into the injection port.
As shown in the preferred embodiment of the apparatus has
four 4.5 cm long 21 gauge s 2 situated parallel allowing precise placement into the
silicone dome of the subcutaneous port during a tissue expansion procedure, thus sing
linear flow rate into the apparatus 1. In this embodiment, the actual diameter of the red
embodiment of the hub 5 is approximately 5 millimeters. Tubing 4 attaches to hub 5 at
second end 6 by stretching the tubing over the second end 6 of the hub. It should be
appreciated that although the hub is shown as having a permanent connection to the tubing,
it can be constructed such that the tubing is detachable. Tubing 4 terminates at the other end
in a female connection of the leur lock base 3.
As shown in , a potential ment of the tubing 4
connection to the hub 5 includes the entry portal for the tubing 4 having an inner diameter
equal to the outer diameter of the tubing 4. The tubing 4 is securely attached to the second
end 6 of the hub 5 allowing unimpeded fluid flow through the tubing 4 into the hub 5, as
shown in .
To use the apparatus 1, leur lock base 3 is attached to a fluid source,
such as a syringe. The fluid is then pushed through the tubing 4.
As shown in — 6D, the red embodiment of the apparatus
1 has a graded directing wall 8 with the narrowest portion at the fluid entry point ter
of the tubing 4) and the widest portion at the fluid exit point (the plurality of needles 2) as
pictured in . As shown , the gradual change in diameter of the system
created by this angled ing wall 8 improves laminar flow.
As the fluid passes through the hub 5, it is distributed into the
ity of needles 2 via a directing cone 9. The directing cone 9 encourages and directs
flow from the proximal end of the hub 5 into the needles 2. Without the directing cone 9, the
fluid would require a 90 degree change in direction to enter the plurality of needles 2.
Therefore, the increased directional flow in a ted manner created by the directing
cone 9 improves laminar flow, thus improving the actualized flow rate of the apparatus 1.
When the s are filled with fluid, the needles are inserted into the
injection port of the tissue expander, and the fluid then fills the tissue expander.
Potential embodiments of the needles 2 including a plurality of
hypodermic needles, conical needles, taper needles or 1.5 inch needles where the diameter
actually tapers from a larger gauge (i.e. 18 gauge) to a smaller 21 gauge size by point in the
needle where the port puncture occurs, as the 21 gauge t is required only for the
portion that enters the port. Additionally, thin walled needles approaching six (6) times
thinner than the standard needle wall are plated as an embodiment of the instant
invention.
Another potential embodiment of the needles 2 includes ultra-thin wall
21 gauge needles that maintain the same external diameter of 0.81 millimeter, but a larger
internal diameter.
As shown in the preferred embodiment of the invention has a
leur lock base 3 to allow for secure attachment of a syringe or other fluid source.
As shown in the red embodiment of the invention
consists of approximately 11 inches of IV tubing 4 to connect the needles. It should be
appreciated, however, that the apparatus 1 can include any type or length of tubing 5 capable
of connecting the needles 2.
As shown in and — 7D, a potential embodiment of the
invention consist of a cone-shaped cut out in the hub 5 that directs fluid flow from the base
3 into the needle 2 in a graduated manner. As shown in , this aggregating cone 10
has a diameter equal to one half of the internal er of the hub 5 minus the diameter of
the directing cone 9 (Formulaically: DAC = 1/2 (Dth — DDC). Thus, surrounding each needle
base, there is a graded wall, consisting of an internal gradual decrease in the diameter of the
base g to the , to channel fluid flow from the widest portion of the directing
wall 8 to the base of the directing cone 9 and increase laminar flow rates.
Other potential embodiments of the IV tubing 4 include no rolling ball
lock to stop IV flow; wider tubing to allow improved flow especially in the fly
segment, a series of one-way valves instead of the four way stopcock to create a “no—touch”
system allowing drawing and ing into the port t manually turning the stocking
into the t position, and an autoinjector that prefills the syringe with a preset amount of
saline (i.e. 35, 50, or 60cc). The one-way valves would require two one-way valves ng
for inflow from the IV bag and out flow through the needle side, and the autoinjector could
be created with a c handle and preloaded spring that draws back on the syringe to the
desired level.
In another potential embodiment, the invention can be used in
subcutaneous ports requiring high volume filling with fluid or fluidic suspension, such as in
breast tissue and subcutaneous tumescence.
It should be appreciated that the invention can also have a fluid
injection system including a series of valves, tubing, syringe and NaCL 0.9% IV fluid
reservoir.
As shown in the apparatus 1 may include a plastic sleeve 11,
to protect the needles 2 when not in use.
To demonstrate the efficiency of the t invention compared to the
t standard, we performed flow velocity measurements in a single-blind study as
shown in Table l. The measurements for the current rd were taken using a BRAUN
brand 21 gauge winged needle infusion set 7B3050. The instant invention incorporated four
21 gauge hypodermic needles.
Table 1. Flow velocity data of the instant invention and the current
standard reported as time to inject and the corresponding time savings of using the instant
invention rather than the t standard.
Multiple Injector Needle vs. Braun 21g Injector Data (1n seconds)
Braun 21 g -Time to Time Savings
Inject
18.900
22.000
.900
.000
18.600
.100
.300
21.000
21.600
21.700
17.300
18.900
18.200
17.800
19.000
18.700
19.000
18.500
17.500
19.000
19.450
1.419
As shown in Table 1, the evaluation conducted showed that the
multiple injector needle average flow rate is d greater than the BRAUN 21g winged
needle infusion set 7B3 050. The e time for injection for twenty (20) trials wherein the
tuses were filled with 60 cc of fluid was 6.075 seconds for the multiple injector
, while the BRAUN 21 g standard took 25.525 seconds. The standard deviation for
each apparatus was 0.71 and 1.96 seconds, respectively. The two-tailed P value for this
evaluation was less than 0.0001, which, considered by conventional criteria, is an extremely
statistically significant difference. Also, the mean of the multiple injector needle minus the
2016/021838
current standard equals 19.450 seconds with a 95% confidence interval for this difference
from 18.507 to 20393. It should be appreciated that the instant invention using four needles
s in greater than fourfold increase in injection rate.
Based on the results of this evaluation, the greater than four times
increased flow velocity of the instant invention results in the tedious and painful injection
process being much more comfortable to perform. With less force required for injection,
less body bruising from pressing against the ribs or abdomen, and less thumb injury will
result. For instance, the basal joint of the thumb sees a thirteen (13) times increased load
from that created at the site of compression. If you press the syringe with your thumb with
twenty (20) pounds per square inch of re, your thumb basal joint sees two hundred
and sixty (260) pounds per square inch, decreasing the risk of the development of arthritis
due to conducting such an injection. Most importantly, faster ion corresponds to faster
surgery time with the patient under anesthesia for less time. ingly, patients will have
better recovery periods, lower chances for infection, and likely faster rge from the
hospital due to the time savings provided by the instant invention.
r, the faster s associated with the multiple injector needle
will likely save total procedure time resulting in cost savings. For instance, in a bilateral
truction procedure, the faster process will likely save upwards of ten (10) minutes
with moderate intraoperative fill volumes. This cost savings is quantified via a 2005 peer-
reviewed study with average cost of $62.00 per minute. This cost does not include
anesthesia costs, nor the expense of consumables. Thus, actual savings are even higher.
Also, as shown in Table 2, we measured fluid ed from the port
during injection to determine leakage of the instant ion.
Table 2. Leakage data of the multiple injector needle after being
inserted and removed into the center of a port thirty (30) times
Leakage Data Log
H do 7:0:»W 31—33 0 O‘U'F@ O\ O\ A?0:»W.
"Fo 77oC 34—37 o OxT‘o\o '/ o
7"\o 38-40 o I\1C? \1[Q 0
Ho 41—43 o \l L») \l U1
00000 44—47 o \l O\ I \1 00 /1/OO
vim-b LHOO \IWO 000
7.o A70o
As shown in Table 2, no tissue expanders were found to be leaking
following ninety (90) days of inspection. The multiple injector needle was used in three (3)
different tissue er samples (1 Mentor; 2 Allergan), and fluid was injected into the
apparatus as well. The apparatus was turned upside down so that the port was at the lowest
point and then wiped dry. Compression of the multiple injector needle with manual pressure
was performed with the port at the lowest point in relationship to gravity. Visible and
le testing was performed to look for any evidence of fluid released from the port. The
lack of data e associated with the instant invention further indicates the reliability and
efficiency of the design of the instant invention.
Although the invention has been described herein as being used with
breast tissue expanders, it is contemplated that it can be used in any tissue expander or in
any other device with an injection port that can accommodate multiple needles.
The terms "comprising, 1ncluding," and g," as used in the
claims and specification herein, shall be considered as indicating an open group that may
include other elements not specified. The terms "a, an," and the singular forms of words
shall be taken to include the plural form of the same words, such that the terms mean that
one or more of something is provided. The term "one" or "single" may be used to indicate
that one and only one of something is intended. Similarly, other specific integer values, such
as "two," may be used when a specific number of things is ed. The terms "preferably,"
"preferred," "prefer, optionally, may," and similar terms are used to indicate that an
item, ion or step being referred to is an optional (not required) feature of the
invention.
The invention has been described with reference to various c
and preferred embodiments and techniques. However, it should be understood that many
variations and modifications may be made while remaining within the spirit and scope of the
invention. It will be nt to one of ordinary skill in the art that methods, devices, device
elements, als, procedures and techniques other than those specifically described
herein can be applied to the practice of the invention as y disclosed herein without
resort to undue mentation. All art-known functional equivalents of methods, s,
device elements, materials, procedures and techniques described herein are intended to be
encompassed by this invention. Whenever a range is disclosed, all subranges and individual
values are intended to be encompassed. This invention is not to be limited by the
embodiments disclosed, including any shown in the drawings or exemplified in the
specification, which are given by way of example and not of limitation.
While the invention has been described with respect to a limited
number of embodiments, those skilled in the art, having benefit of this disclosure, will
appreciate that other embodiments can be devised which do not depart from the scope of the
invention as disclosed herein. Accordingly, the scope of the invention should be limited
only by the attached claims.
All references throughout this application, for example patent
documents ing issued or granted patents or equivalents, patent application
publications, and non-patent literature documents or other source material, are hereby
incorporated by nce herein in their entireties, as though dually incorporated by
reference, to the extent each reference is at least partially not inconsistent with the disclosure
in the t application (for example, a reference that is partially istent is
incorporated by reference except for the partially inconsistent portion of the reference).
21189653.1:DCC -17/02/2021
Claims (9)
1. A fluid injection device comprising: a plurality of needles; a hub having a first end portion and a second end portion, a plurality of needle bases at the second end portion, and a ing cone extending from the second end portion with the plurality of needle bases at least partially surrounding the directing cone, the directing cone tapering in a direction away from the first end portion for diverting flow toward the plurality of needle bases, each of said plurality of needles being in fluid communication with a respective one of the plurality of needle bases and ting from said first end portion of the hub; and a base component, te from and couplable to a second end portion of the hub, the directing cone ing into a cavity of the base component when coupled thereto, upstream of the plurality of needle bases, the base component comprising an inlet for connecting the device to a fluid source.
2. The device of claim 1 n said plurality of needles consists of two s.
3. The device of claim 1 wherein said plurality of needles consists of three needles.
4. The device of claim 1 n said plurality of needles consists of four needles.
5. The device of claim 1 n said plurality of needles consists of five needles.
6. The device of claim 1 wherein said plurality of needles consists of six needles.
7. The device of any one of claims 1 to 6 wherein said needles consist of hypodermic needles.
8. The device of any one of claims l to 7 wherein said needles consist of 21 gauge needles.
9. The device of any one of claims 1 to 6 wherein said needles are conical. 21189653.1:DCC -
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562131064P | 2015-03-10 | 2015-03-10 | |
US62/131,064 | 2015-03-10 | ||
PCT/US2016/021838 WO2016145230A1 (en) | 2015-03-10 | 2016-03-10 | Multiple needle injector |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ734684A NZ734684A (en) | 2021-08-27 |
NZ734684B2 true NZ734684B2 (en) | 2021-11-30 |
Family
ID=
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