NZ618370B2 - Injection site for tubular medical connectors - Google Patents
Injection site for tubular medical connectors Download PDFInfo
- Publication number
- NZ618370B2 NZ618370B2 NZ618370A NZ61837012A NZ618370B2 NZ 618370 B2 NZ618370 B2 NZ 618370B2 NZ 618370 A NZ618370 A NZ 618370A NZ 61837012 A NZ61837012 A NZ 61837012A NZ 618370 B2 NZ618370 B2 NZ 618370B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- annular
- retention edge
- turned
- connector
- injection site
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract description 14
- 239000007924 injection Substances 0.000 title claims abstract description 14
- 230000014759 maintenance of location Effects 0.000 claims abstract description 30
- 230000002093 peripheral Effects 0.000 claims abstract description 10
- 230000000295 complement Effects 0.000 claims abstract description 6
- 230000000284 resting Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 description 4
- 238000004659 sterilization and disinfection Methods 0.000 description 4
- 210000000088 Lip Anatomy 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229920002725 Thermoplastic elastomer Polymers 0.000 description 2
- 230000000249 desinfective Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000001954 sterilising Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 210000002320 Radius Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 230000036633 rest Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M2039/0036—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
- A61M2039/0063—Means for alignment of the septum, e.g. septum rim with alignment holes
-
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/04—Access sites having pierceable self-sealing members
-
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
Abstract
Injection site for tubular medical connectors (1), comprising a perforable body (7) inserted in a seat (4) of the connector (1) delimited by an annular wall (5) having a retention edge (8) turned in against the outer end (9) of the perforable body (7), said outer end (9) being formed with a peripheral annular step and with an exposed portion with reduced cross section (11) projecting axially. The peripheral step is defined by an annular groove having a shape complementary to that of the turned-in retention edge (8) of the connector (1), and the portion with reduced cross section (11) of the perforable body (7) connects up to the groove (12) through an annular surface (13) projecting radially above at least part of the turned- in retention edge (8) and resting against it. al annular step and with an exposed portion with reduced cross section (11) projecting axially. The peripheral step is defined by an annular groove having a shape complementary to that of the turned-in retention edge (8) of the connector (1), and the portion with reduced cross section (11) of the perforable body (7) connects up to the groove (12) through an annular surface (13) projecting radially above at least part of the turned- in retention edge (8) and resting against it.
Description
"Injection site for tubular medical connectors"
Field of the invention
The present invention relates to tubular medical
connectors, typically for infusion or transfusion
lines, equipped with an injection site for introduction
of fluid substances into the connector.
Background
Traditionally in connectors of this sort, which
are normally made of moulded plastic material, the
injection site is constituted by a perforable body made
of elastomeric material or thermoplastic rubber
inserted into a seat of the connector delimited by an
annular end wall having a retention edge. Following
upon insertion of the perforable body into said seat,
the end edge of the wall of the connector is turned in,
for example by means of hot or cold deformation or else
via ultrasound, so as to block the perforable body
stably in its seat.
Currently, the perforable body is shaped like a
generally cylindrical wafer with constant cross section
so that the turned-in retention edge of the wall of the
corresponding seat is set in frontal contact against
the outer end of said body. In this way, a perimetral
discontinuity is determined along the resting area of
the turned-in retention edge that not only renders
disinfection or sterilization of the surface of said
end prior to introduction of the needle problematical,
but can also constitute a trap for impurities.
From the documents Nos. WO-2010/069361, WO-
90/11103, US-5400500 and WO-89/00867 injection sites of
the type defined above are known, in which the outer
end of the perforable body is formed with a peripheral
annular step for engagement of the turned-in retention
edge of the wall of the connector, and with a portion
with reduced cross section projecting axially beyond
the annular step.
This solution makes it easier to disinfect or
sterilize the exposed end of the perforable body prior
to introduction of the needle thanks to the more
immediate accessibility from outside of the portion
projecting axially beyond the annular step, but
entails, however, again the drawback that possible
impurities can deposit and get stuck in the annular
space comprised between the surface of the turned-in
retention edge of the wall of the connector and the
side wall facing it of the axially projecting portion
with reduced cross section of the perforable body.
Summary of the invention
A desirable outcome of the present invention is
hence to overcome said drawback in an effective and at
the same time simple and economically advantageous way.
Accordingly, the present invention provides an
injection site for tubular medical connectors,
comprising a perforable body inserted in a seat of the
connector delimited by an annular wall having a
retention edge turned in against an outer end of said
perforable body, wherein said outer end of the
perforable body is formed with a peripheral annular
step for engagement of said retention edge of said wall
of the connector, and with an exposed portion with
reduced cross section projecting axially beyond said
annular step, wherein said peripheral step is defined
by an annular groove having a shape complementary to
that of said retention edge and in that said portion
with reduced cross section of said perforable body
connects up to said groove through an annular surface
projecting radially above at least part of said turned-
in retention edge and resting thereagainst.
According to the invention the above desirable
outcome may be achieved thanks to the fact that the
aforesaid step is defined by an annular groove having a
shape complementary to that of said turned-in retention
edge of the wall of the connector and to the fact that
the portion with reduced cross section of the
perforable body connects up to said groove through an
annular surface projecting radially above at least part
of said turned-in retention edge and resting
thereagainst.
Thanks to this arrangement, the turned-in
retention edge of the wall of the connector impinges
laterally instead of frontally upon the perforable body
and is at least partially overlaid and hence covered by
the radially projecting annular surface of said
perforable body, the exposed surface of which remains
immediately accessible from outside so that it can
effectively be disinfected prior to insertion of the
needle.
Brief description of the drawings
The invention will now be described in detail with
reference to the annexed drawings, which are provided
purely by way of non-limiting example and in which:
- Figure 1 is a schematic view in axial section of
a medical connector provided with an injection site
according to the invention;
- Figure 2 is the view in axial section at an
enlarged scale of the perforable body of the injection
site of Figure 1; and
- Figure 3 shows a detail of Figure 2 at a further
enlarged scale.
Detailed description of the invention
With reference to the drawings, designated by 1 is
a tubular connector for medical lines, which, in the
case of the example illustrated, has a Y-shaped
configuration with a main duct 2 and a secondary duct 3
with mutually communicating convergent axes.
The end of the main duct 2 adjacent to the
secondary duct 3 has a seat 4 delimited laterally by an
annular wall 5 and internally by an axial annular rest
Housed in the seat 4 is a body 7 shaped like a
wafer, typically made of elastomeric material or
thermoplastic rubber, which can be perforated with a
needle. The body 7 hence defines an injection site or
needle point for introduction into the connector 1 of a
medical fluid or the like.
The body 7, enclosed in the wall 5, on one side
impinges axially on the annular rest 6 and on the
opposite side is blocked, at its end 9 exposed towards
the outside of the tubular connector 1, by an annular
retention edge 8 of the wall 5. Since normally the
connector 2 is made of moulded thermoplastic material,
the retention edge 8 is bent i.e. turned in by means of
hot or cold deformation or else via ultrasound so as to
assume substantially the conformation represented in
Figure 1, i.e., a curled shape rounded and closed on
itself for an angular amplitude substantially greater
than 180°.
According to the peculiar characteristic of the
invention, the retention edge 8 is turned in not
frontally against the surface of the end 9 of the
perforable body 7, as is instead the case of the known
art, but at the side thereof and is moreover at least
partially covered and protected at the top by the
perforable body 7.
More in particular, and as is illustrated in
detail in Figures 2 and 3, the perforable body 7 is
formed, in the proximity of its exposed end 9, with a
peripheral annular step 10 that radiuses with a
portion with reduced cross section 11, which defines
the exposed surface of the end 9 of the perforable body
7. As is even more clearly visible in Figure 3, the
step 10 is defined by a peripheral groove with rounded
wall 12, having a shape complementary to that of the
turned-in retention edge 8, which connects up with the
portion with reduced cross section 11 through an
annular lip 13 with tapered profile, projecting
radially outwards above the step 10.
To return to Figure 1, the retention edge 8 of the
wall 5 is turned in against the step 10, within the
annular groove 12, and the lip 13 of the portion with
reduced cross section 11 rests at the top against it.
In this way, the surface of the exposed end 9 of
the perforable body 7 axially projects beyond the
retention edge 8, facilitating the necessary operations
of disinfection or sterilization, in use of the
connector 1, prior to perforation of the body 7 by a
needle. At the same time, engagement of the retention
edge 8 in the groove 12 and its at least partial
covering by the radially projecting annular lip 13
effectively prevents introduction of impurities between
said retention edge 8 and the perforable body 7.
Of course, the details of construction and the
embodiments may vary widely with respect to what is
described and illustrated herein, without thereby
departing from the scope of the present invention as
defined in the ensuing claims. Thus, even though the
invention has been described with reference to a Y-
shaped tubular connector, it is equally advantageously
applicable to an injection site of medical connectors
of any kind.
Claims (3)
1. An injection site for tubular medical connectors, comprising a perforable body inserted in a 5 seat of the connector delimited by an annular wall having a retention edge turned in against an outer end of said perforable body, wherein said outer end of the perforable body is formed with a peripheral annular step for engagement of said retention edge of said wall 10 of the connector, and with an exposed portion with reduced cross section projecting axially beyond said annular step, wherein said peripheral step is defined by an annular groove having a shape complementary to that of said retention edge and in that said portion 15 with reduced cross section of said perforable body connects up to said groove through an annular surface projecting radially above at least part of said turned- in retention edge and resting thereagainst.
2. The injection site according to Claim 1, 20 wherein said annular surface has a tapered profile.
3. The injection site according to Claim 1 or Claim 2, wherein said retention edge of said wall of the connector and said annular groove of the outer end of the perforable body have a rounded shape. FIG. 3
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000481A ITTO20110481A1 (en) | 2011-06-01 | 2011-06-01 | NEEDLE POINT FOR MEDICAL TUBULAR FITTINGS |
| PCT/IB2012/052736 WO2012164514A2 (en) | 2011-06-01 | 2012-05-31 | Injection site for tubular medical connectors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NZ618370A NZ618370A (en) | 2015-01-30 |
| NZ618370B2 true NZ618370B2 (en) | 2015-05-01 |
Family
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