U.S. patent application number 10/505232 was filed with the patent office on 2005-08-11 for urine sample collection device.
Invention is credited to Levinson, Orde.
Application Number | 20050177070 10/505232 |
Document ID | / |
Family ID | 27256380 |
Filed Date | 2005-08-11 |
United States Patent
Application |
20050177070 |
Kind Code |
A1 |
Levinson, Orde |
August 11, 2005 |
Urine sample collection device
Abstract
A urine sample collection device comprising a urine receptor
having an outlet aperture, a generally elongate tubular member
extending from said receptor outlet aperture to an open end, the
tubular member having an opening (21) formed in the side thereof, a
coupling means (5') for releasably mounting a urine collection
container, the coupling means having a passage extending
therethrough which meets said opening whereby urine can flow from
the tubular member into a mounted container, and a flow director
(24) located at or adjacent said opening and formed to direct urine
past the opening.
Inventors: |
Levinson, Orde; (Oxford,
GB) |
Correspondence
Address: |
LAUBSCHER SEVERSON
1160 SPA RD
SUITE 2B
ANNAPOLIS
MD
21403
US
|
Family ID: |
27256380 |
Appl. No.: |
10/505232 |
Filed: |
April 18, 2005 |
PCT Filed: |
February 4, 2003 |
PCT NO: |
PCT/GB03/00472 |
Current U.S.
Class: |
600/574 ;
604/323 |
Current CPC
Class: |
A61B 10/007 20130101;
A61F 5/455 20130101 |
Class at
Publication: |
600/574 ;
604/323 |
International
Class: |
A61B 005/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 20, 2002 |
GB |
0203993.1 |
Apr 18, 2002 |
GB |
0208895.1 |
Jun 13, 2002 |
GB |
0213601.8 |
Claims
1. A urine sample collection device comprising a urine receptor
having a surface which flares out from an outlet aperture to a rim
defining a perimeter of an inlet area into which a user urinates; a
generally elongate tubular member extending to an open end from
said receptor outlet aperture and receiving urinated urine flowing
from said outlet aperture, the tubular member having an opening
formed in the side thereof; a coupling means for releasably
mounting a urine collection container, the coupling means having a
passage extending therethrough which meets said opening whereby
urine flowing in the tubular member can flow therefrom into a
mounted container; and a flow director located within the tubular
member at or adjacent said opening and formed to direct urine past
the opening.
2. A device according to claim 1 wherein the flow director
comprises a projection towards a longitudinal axis of the tubular
member.
3. A device according to claim 2 wherein the projection is provided
upstream of the opening.
4. A device according to claim 3 wherein the projection is also
formed downstream of the opening.
5. A device according to claim 3 wherein the projection upstream of
the opening has a surface inclined relative to the surface of said
side of the tubular member.
6. A device according to claim 4 wherein the projection upstream of
the opening comprises a wall which extends across the tubular
member to an extent corresponding to an upstream edge of said
opening.
7. A device according to claim 1 wherein the flow director is
formed to channel the urine flow along either side of the
aperture.
8. A device according to claim 2 wherein said projection towards
the longitudinal axis of the tubular member comprises the passage
of the coupling means, the passage extending into the tubular
member and presenting an area within the tubular member into which
urine can enter and flow into the collection container.
9. A device according to claim 8 wherein the passage of the
coupling means extends into the tubular member by an amount
corresponding to between 20 and 60% of the height of the internal
dimension of the tubular member.
10. A device according to claim 8 wherein said area comprises a
semi-circle and wherein the passage extends into the tubular member
to a greater extent downstream than upstream.
11. A device according to claim 8 wherein the coupling means
includes a further passage extending therethrough which meets said
opening to present an area from which air in the collection
container can escape into the tubular member.
12. A device according to claim 11 wherein the further passage of
the coupling means extends into the tubular member by an amount
which is greater than the first mentioned passage.
13. A device according to claim 11 wherein an opening at the
further passage in the tubular member faces downstream.
14. A device according to claim 11 the opening in the further
passage is at an incline facing downstream relative to the surface
of said side of the tubular member.
15. A device according to claim 11 wherein a covering means for the
opening is provided adjacent the opening.
16. A device according to claim 1 wherein the tubular member tapers
to said open end.
17. A device according to claim 1 and further comprising a flow
limiter, or urine collection container having a flow limiter, for
limiting flow of urine into the container.
18. A device according to claim 17 wherein the flow limiter allows
urine to enter a container to a predetermined limit, after which
further urine is prevented from entering the container.
19. A device according to claim 17 wherein the flow limiter
comprises a valve between the opening and a container in use, which
valve closes when the urine in the container reaches a
predetermined level.
20. A device according to claim 17 wherein the flow limiter
comprises a valve through which urine can flow from the tubular
member into a container, the valve comprising a lower opening
through which urine can pass into the container, an upper opening
through which urine can enter the valve from the tubular member,
and a closure member positioned between the upper and lower
openings, and dimensioned so as to be capable of closing the upper
opening.
21. A device according to claim 20 wherein the closure member has a
density lower than that of urine.
22. A device according to claim 20 wherein the closure member
comprises a ball.
23. (canceled)
Description
[0001] The present invention relates to a urine sample collection
device.
[0002] The Applicant is the proprietor of earlier patent
application WO-A-01/74275. This application details the various
reasons why urine samples are collected, and the uses for the
results of the analysis of the collected sample.
[0003] FIG. 1 illustrates a urine sample collection device 1 based
on the disclosure of this earlier patent application. The device
has a urine receptor generally identified by reference numeral 2.
This comprises a surface 7 which defines at one end an outlet
aperture 3 and which flares out to define at its other end a rim 8
forming a perimeter of an inlet area into which a user urinates.
The various forms of the receptor are described in more detail in
the aforementioned patent application. The outlet aperture is
coupled to one end of a generally elongate hollow tubular member or
pipe portion 4. The other end of the tubular member is open. The
tubular member 4 narrows along its length and the end remote from
the outlet aperture 3 defines a generally oblong excess outlet
aperture 6. A sample container coupling 5 comprises a short hollow
stub like tube which is formed with a passage therethrough which
meets an opening in the centre of the side of the tubular member.
The sample container coupling 5 is located along the tubular member
4 to be spaced from the outlet aperture 3. The sample container
coupling is formed to provide a push fit for a standard urine
sample collection container or bottle (not shown). The sample
container coupling 5 is located and formed such that the sample
container is orientated vertically downwards during use.
[0004] In use, a standard tubular urine sample collection container
(not shown) is pushed onto the sample container coupling 5. A
female user then locates the receptor 2 against their body to cover
the urethra as explained more fully in the aforementioned patent
application. A male user locates the end of their penis into the
receptor.
[0005] The user then urinates and urine flows along the tubular
member and flows both into the urine sample collection container
and but of the excess outlet aperture 6. Once the collection
container is full, the user can simply finish urinating because
excess urine flows out of the excess outlet 6. Alternatively, the
user can withdraw the device 1 and continue to urinate, but this
increases the likelihood of contamination to their hands.
[0006] In this type of device, the urine flows through the device
and out of the excess outlet aperture with a proportion of that
urine flow being collected in the collection container via sample
container coupling 5. This through flow type of device differs from
devices where all the urine flow is directed straight into a
collection container.
[0007] However, filling the urine collection container to capacity
can cause problems. For example, uncoupling the full collection
container from the collection device without spillage may be
problematic.
[0008] It is an object of the present invention to provide an
improved urine sample collection device. According to the present
invention there is provided a urine sample collection device
comprising:
[0009] a urine receptor having a surface which flares out from an
outlet aperture to a rim defining a perimeter of an inlet area into
which a user urinates;
[0010] a generally elongate tubular member extending from said
receptor outlet aperture to an open end, the tubular member having
an opening formed in the side thereof;
[0011] a coupling means for releasably mounting a urine collection
container, the coupling means having a passage extending
therethrough which meets said opening whereby urine can flow from
the tubular member into a mounted container; and
[0012] a flow director located at or adjacent said opening and
formed to direct urine past the opening.
[0013] A view has been expressed by medical personnel that it is
important to sample the urine mid stream. One justification for
obtaining a mid stream urine (MSU) sample is that if there is any
initial contamination in or around the urinary tract or urethra,
such contamination will be flushed out at the start of urination.
Another justification is that a MSU sample is more representative
of the contents of the bladder than that at the start of urination
and is less dependent on personal hygiene.
[0014] In this case, if an MSU sample is to be obtained, it is
important not to collect the initial flow at the start of urination
and immediately thereafter. Unfortunately, with the device shown in
FIG. 1, it is not possible to guarantee that a proportion of this
initial flow will not be collected. The flow director of the
present invention can be used to direct urine which is not from the
midstream towards the open end of the tubular member and direct
midstream urine into the urine collection container.
[0015] It should be noted that by flared out we mean any shape
which changes from a narrow shape to a broad shape.
[0016] Preferably the flow director comprises a projection towards
the axis of the tubular member.
[0017] In one embodiment, the projection is provided upstream of
the opening. This projection can be used to divert the flow of the
urine away from the opening.
[0018] In another embodiment, the projection is also formed
downstream of the opening.
[0019] In one preferred embodiment, the projection upstream of the
opening has an inclined surface.
[0020] In another preferred embodiment, the projection upstream of
the opening comprises a wall which extends across the tubular
member to an extent corresponding to the upstream edge of said
opening.
[0021] Conveniently, the flow director is formed to channel the
urine flow along either side of the aperture.
[0022] In a preferred embodiment of the present invention, the
projection towards the axis of the tubular member may comprise a
passage of the coupling means, the passage extending into the
tubular member and presenting an area within the tubular member
into which urine can enter and flow into the collection container.
The area does not have to be in the same plane as the walls of the
elongate tubular member.
[0023] Preferably, the passage of the coupling means extends into
the tubular member by an amount corresponding to between 20 and 60%
of the height of the tubular member. The area conveniently
comprises a semi-circle, and the extension of the passage into the
tubular member is greater downstream than upstream.
[0024] The coupling means preferably includes a further passage
extending therethrough which meets said opening to present an area
from which air in the collection container can escape into the
tubular member. The further passage of the coupling means
preferably extends into the tubular member by an amount which is
greater than the urine passage.
[0025] The further (air) passage can be upstream or downstream of
the urine passage. It should be noted,that by designating the
passages air and urine it does not preclude other fluids or a
mixture thereof flowing through the passages (e.g air can flow
through the urine passage).
[0026] Preferably an opening of the further passage in the tubular
member faces downstream.
[0027] In a preferred embodiment the opening in the further passage
is at an incline facing downstream.
[0028] Conveniently, in addition or in the alternative, a covering
means is provided adjacent the opening in the further passage.
[0029] The body has evolved such that urine traveling out of the
body travels in a spiral configuration in order to reduce the
amount spraying. As the urine travels down the elongate tubular
member in a spiral configuration it can cause an air lock in the
further passage. As will be appreciated, the air lock stops the
urine flowing into the urine collection container. If the opening
of the passage faces downstream, is at an incline or there is a
cover provided to deflect the urine away from the opening then the
likelihood of an air lock being produced is reduced.
[0030] It is preferred that the tubular member tapers to a smaller
cross-section at said open end. Accordingly, the urine which is
flowing through the tubular member and past the opening in the side
thereof will begin to "back-up" when sufficient urine is flowing
(i.e during the midstream) and, therefore, will start to flow
through the opening in the side of the tubular member and into the
urine collection container.
[0031] Preferably the device further comprises a flow limiter, or
urine collection container having a flow limiter, for limiting flow
of urine into the container.
[0032] The flow limiter preferably allows urine to enter a
container to a predetermined limit, after which further urine is
prevented from entering the container. In this way, the amount of
urine entering the container cannot exceed a predetermined maximum,
for example beyond a fraction (e.g. from 50 to 75%) of the capacity
of the container.
[0033] The flow limiter may limit flow of urine into the container
by preventing ingress of urine, or by preventing egress of
displaced air from the container. For example, the flow limiter may
prevent ingress of urine into the container by means of a valve
between the opening and a container in use, which valve closes when
the urine in the container reaches a predetermined level.
Alternatively, the device may comprise a passage, for example
between the container and the tubular member, through which air
displaced from the container by ingress of urine can escape from
the container, whereby urine is prevented from entering the
container by the urine level rising to cover the container-side
opening of the passage. In this way, further urine is prevented
from entering the container by preventing air from being displaced
from the container.
[0034] In the present invention the urine and air passages extend
into the container, which is fitted to the device such that
substantially all fluid transfer between the tubular member and the
container occurs via the said passages, in particular transfer of
urine from the tubular member to the container via the urine
passage and transfer of air from the container to the tubular
member via the air passage. Thus, as urine enters the container via
the urine passage air is displaced into the tubular member via the
air passage. However, when the level of urine in the container
rises to cover the container-side opening of the air passage, no
further air can be displaced from the container into the tubular
member, and hence no further urine can enter the container. The
amount of urine which can enter the container is thus largely
determined in this embodiment by the extent to which the second
passage extends into the container.
[0035] In another preferred embodiment of the present invention,
the flow limiter comprises a valve through which urine can flow
from the tubular member into a container. For example, the valve
may comprise a lower opening through which urine can pass into the
container, an upper opening through which urine can enter the valve
from the tubular member, and a closure member positioned between
the upper and lower openings, and dimensioned so as to be capable
of closing the upper opening. In this embodiment, the closure
member may conveniently have a density lower than that of urine,
i.e. it will float in urine, so that as the level of urine in the
container rises to reach the closure member it will float upon the
urine. Thus, the closure member will rise with the urine, until it
reaches the upper opening to form a seal therewith, thus preventing
further urine from entering the container. Once the upper opening
has been sealed in this way, as the user continues to urinate,
further urine will merely pass through the tubular member from the
device.
[0036] Examples of the invention will now be described with
reference to the following figures, in which:
[0037] FIG. 1 shows an oblique perspective view of a known urine
sample collection device;
[0038] FIG. 2 shows a perspective side view of a tubular member
part of an embodiment of the present invention;
[0039] FIG. 3 shows the cross-sectional views along the line C-C of
FIG. 2;
[0040] FIG. 4 shows the cross-section along the line D-D of FIG.
2;
[0041] FIG. 5 illustrates a side view of a receptor, tubular member
and coupling means parts of another embodiment of the present
invention;
[0042] FIG. 6 illustrates a plan view of the urine receiving
portion of FIG. 5 as viewed along the axis of the tubular
member;
[0043] FIG. 7 illustrates a cross-sectional side view taken along
the length of the tubular member part of FIG. 5 omitting the urine
receptor.
[0044] FIG. 8 illustrates a flow limiter for use with the urine
sample collection devices shown in the previous Figures;
[0045] FIG. 9 illustrates a further flow limiter for use with the
urine sample collection devices shown in FIGS. 1 to 7; and
[0046] FIG. 10 illustrates a further flow limiter for use with the
urine sample collection devices shown in FIGS. 1 to 7.
[0047] Component parts which are common amongst the figures bear
common reference numerals.
[0048] It is considered that if a through flow type of device as
shown in FIG. 1 is to obtain a mid stream urine sample, it is
necessary to ensure that as little as possible of the initial urine
flows into the collection container. It is considered that the
proportion of urine entering the collection container, at least
during the initial flow, will be a function of the area of the
opening to the passage through the sample container coupling 5,
that is to say, the opening of the passage onto the tubular portion
4, and the velocity (and hence momentum) of the urine flow upstream
of the coupling. The former can be designed whilst the latter will
be influenced by the bladder of the user and by gravity consequent
to the angle of the urine flow in the tubular portion relative to
vertical.
[0049] One option to reduce the proportion of urine entering the
collection container during the initial flow would be to make the
aforementioned area smaller and/or increase the velocity of the
urine flow. Unfortunately, this tends to lead to problems with the
overall urine collection to the point that the collection container
remains substantially empty.
[0050] FIG. 2 illustrates an oblique perspective view of a portion
of a tubular member 4' corresponding to the tubular member 4 shown
in FIG. 1. The precise form of the receptor is not material to the
present invention. In this embodiment, the tubular member has a
generally square cross section as shown in the drawings but is not
limited thereto. The tubular member has a base 20 from which a
sample container coupling 5' extends. The sample container coupling
5' has a passage therethrough which meets an opening formed in the
base of the tubular member 4', the opening defining a planar area
21. Thus, urine flowing down the tubular member 4' can pass down
into a collection container (not shown) fitted to the coupling 5'.
The flow of urine in the tubular member 4' is indicated by an arrow
U, substantially along the axis of the tubular member.
[0051] In this embodiment, the base 20A which is upstream of the
area 21 is formed to include an inclined surface or ramp 24 which
leads up to the area 21. The ramp therefore projects towards the
axis of the tubular member. The area 21 is substantially parallel
to the surface of upstream base 20A but is not in the same plane.
Downstream of the area 21, the central member of the base of the
tubular member 4' along the axis thereof defines a plateau surface
22 which is on the plane defined by the area 21. Towards either
edge of this plateau surface, channels 23 are formed which extend
either side of the area 21 to meet the base 20 which is upstream of
the area 21. The base of the channels 23 is on the plane of the
base 20 which is upstream of the area 21.
[0052] Thus, when urination starts, if the urine is flowing slowly,
urine will flow along the channels 23 and pass either side of the
area 21 so that none of this initial flow will pass into the
collection container through the area 21. As the urine flow builds
up in velocity, it will tend to rise up the ramp 24. Eventually,
the urine will tend to travel entirely up the ramp and will be
directed over the area 21. However, due to the velocity, the urine
will tend not to fall onto the area but instead pass completely
over it so that none of this flow will pass into the collection
container through the area 21. Consequently, the channels and ramp
24 function to direct the flow of urine past the area 21.
[0053] Generally speaking, the volume of urine entering the tubular
member 4' will eventually be greater than that leaving through the
aperture 6. Thus, a front of fluid begins to "back up" along the
tubular member. When the front reaches the area 21, the collection
container will begin to fill. Thus, the early part of the urine
flow does not pass into the collection container so that an MSU
sample is collected.
[0054] Consequently, by having a ramp 24 to direct the urine to
pass over the area 21 facilitates the collection of an MSU sample.
In addition, by having the channels 23, if the initial urine flow
is very slow, for example due to urological diseases or infections
which can cause pain or for those with voiding difficulties or
obstructions, this slow moving urine is directed either side of the
area 21 and is not collected. In addition, in cases where imperfect
personal hygiene tends to contaminate the early part of a urine
sample, this contaminated part of the urine flow is not
collected.
[0055] The present invention is capable of considerable
modification, the detailed embodiments of which will be readily
apparent to those skilled in the art. For example, whilst the
present embodiment has been described to include channels 23, these
can be omitted such that the ramp 24 extends across the width of
the base 20 if very slow urine flow is not to be considered a
problem during urine collection. It will be appreciated that the
angle and size of ramp can be varied. Whilst a ramp has been
described as the flow director, a wall can be used which extends
across the base 24 to an extent corresponding to the upstream edge
of the area 21 such that the area is masked from the direct flow of
urine along the tubular member 4'. The wall can also be V-shaped
pointing upstream so that slow moving urine is directed around the
area 21. Alternatively, the coupling 5' can be made such that it
extends through the base 20 whereby its upper edge defines the area
21 which is in a plane located displaced relative to the base
20.
[0056] In this respect, referring to the urine sample collection
device 1" shown in FIGS. 5 to 7, the urine receptor 2" is
substantially identical to that shown in FIGS. 1 to 4. However, it
will be noted that the device has a tubular member 4" which
comprises a constant circular cross-section tube, that is to say,
it does not narrow between the urine receptor 2" and the excess
outlet aperture 6".
[0057] A sample container coupling 5" is located as with FIGS. 1 to
4. As can be seen from FIGS. 6 and 7, the outer surface of the
coupling 5" has a portion 10 at the end onto which a sample
container can be attached, this portion having a circular
cross-section outer surface. The outer surface of the coupling 5"
also has a portion 12 where the coupling meets the tubular member
4". The portion 12 has a larger circumference than the portion 10,
the portions 10 and 12 meeting at an elbow 11.
[0058] A passage is formed through the coupling 5" which comprises
a circular cross-section tube which is split into first and second
separate channels 13 and 14 having respective semi-circular
cross-sections, as can be seen from FIG. 6. One end (the lower end)
of the channels 13 and 14 extend equally from the lower edge of the
portion 10, as can be seen from FIG. 7. The other end (the upper
end) of the channels 13 and 14 extend through the base of and into
the tubular member 4". The upper edge of the channel 14 extends
further into the tubular member 4" than the channel 13 and is
located on the side towards the outlet aperture 6" (downstream).
The upper edge of the channel 13 defines a semi-circular area 21"
whilst the upper edge of the channel 14 defines a semi-circular
area 15.
[0059] When urination starts, if the urine is flowing slowly, urine
will flow down the tubular member 4" and will flow either side of
the channels 13 and 14 extending into the member 4". Thus, none of
this initial flow will pass into a collection container. As the
urine flow builds up in velocity, the flow in the tubular member 4"
will become deeper until the depth reaches a value of "a", which
comprises the distance (the height) of the upstream edge of the
channel 13 from the base of the tubular member 4", as shown in FIG.
7. At this point, urine will start to flow into the area 21" and
down through the channel 13 into the collection container. The
downstream channel 14 acts as an air vent for air to escape from
the collection container as it fills. The upper edge 15 has a
height from the base of the tubular member 4" which is greater than
"a" so that urine does not normally flow down channel 14. The
height "a" is preferably in the range of 20 to 60% of the height of
the tubular member 4" at the point of the coupling 5". In this
case, the tubular member has a diameter "d" and hence a 20-60% of
d. Thus, the area 21" is effectively spaced from the base or lower
surface of the tubular member 4" by an a distance which provides a
wall against slow flowing urine.
[0060] It will be apparent that an air vent for the collection
container can be provided in a different manner.
[0061] The present invention may be produced from a plastics
material injected into a tool having a shaped insert to form the
tubular member 4'. In the described embodiment of FIGS. 2 to 4, the
tubular insert can be a single piece that is withdrawn in the
direction of the receptor 2. If a two piece insert is used, it is
possible to have the area 21 made such that it is in the plane of
the base 20 but the top edge of the ramp 24 remains displaced from
the plane of the base.
[0062] By having a construction as shown in the embodiment of FIGS.
5 to 7 and with a tubular member 4" which does not narrow, it is
possible to produce a tool in which a shaped insert can form the
tubular member 4" by insertion into opposing ends thereof.
[0063] Referring to FIG. 8, a flow limiter for use with the urine
collection devices illustrated in the previous Figures comprises a
valve 100 for preventing ingress of urine into a container 122. The
valve 100 is positioned within the first channel 13, described with
reference to FIGS. 5 to 7, with corresponding second channel 14 for
escape of displaced air into the tubular member (not shown in FIG.
8). The valve 100 comprises an upper opening 102, a lower opening
104 and a closure member in the form of a ball 106. The ball 106
has an overall density lower than that of urine, and will thus
float on urine, and is initially maintained in position away from
the lower opening 104 by an internal wall 108 so as not to block
the lower opening 104. The diameter of the ball 106 is greater than
that of the upper opening 102. In use, urine will enter the valve
100 from the tubular member as indicated by arrow A, passing
through and out of the valve 100 as indicated by arrow A' into the
container 122. The urine level in the container 122 will rise, and
after a time will enter the valve 100 via lower opening 104. As the
urine level continues to rise within the valve 100, the ball 106
will float on the urine, until it reaches the upper opening 102,
i.e. urine will rise within the container 122 to the level
approximately indicated by arrows B in FIG. 8. The ball 106 will
then close the upper opening 102, thus preventing further urine
from entering the valve 100, and hence the container 122. As the
user continues to urinate, further urine cannot pass through the
valve 100 into the container 122, but merely passes through and
from the tubular member. Of course, urine will be present within
the first channel 13 above the valve 100 between the tubular member
and the valve 100, which urine will drop into the container 122
when the ball 106 drops from the upper opening 102 as the container
122 is removed from the device. The total amount of urine to be
collected can thus be predetermined from the position of the valve
100 within the container 122 in use, and the capacity of the first
channel 13 between the tubular member and the valve 100. Urine
spillage on removal of the container 122 from the device can be
substantially prevented by ensuring that the capacity of the
container 122 above the level of the valve 100 in use is greater
than the capacity of the first channel 13 between the tubular
member and the valve 100.
[0064] Referring to FIG. 9, a further flow limiter is illustrated
which comprises first and second channels 13 and 14, described with
reference to FIGS. 5 to 7. The second channel 14 extends into the
container 122 by an amount which is greater than the first channel
13. The container 122 forms a fluid tight seal with the coupling
105, i.e. urine can enter the container 122 only through first
channel 13 and displaced air can only escape from the container 122
through second channel 14. Thus, as described hereinabove with
reference to FIGS. 5 to 7, in use urine passes into the container
122 from the tubular member (not shown in FIG. 9) via channel 13,
as indicated by arrow A", and displaced air passes out of the
container 122 via channel 14, as indicated by arrow C. As the urine
level within the container 122 rises it will after a time reach the
level of the lower opening of channel 14, as approximately
indicated in FIG. 9 by arrows D. At this point, no further air can
be displaced from the container 120, and hence no further urine can
enter the container 120. Thus, all further urine will passe through
the tubular member from the urine collection device. Of course,
urine will be present within the first channel 13, which urine will
drop into the container 122 when it is removed from the device,
i.e. when the fluid tight seal between the container 122 and the
coupling 105 is broken and air can escape. The total amount of
urine to be collected can thus be predetermined from the position
of the lower opening of the second channel 14 within the container
122 in use, and the capacity of the first channel 13. Urine
spillage on removal of the container 122 from the device can be
substantially prevented by ensuring that the capacity of the
container 122 above the level of the lower opening of the second
channel 14 in use is greater than the capacity of the first channel
13.
[0065] A further flow limiter for use with the urine sample
collection devices shown in FIGS. 1 to 7 is illustrated in FIG. 10.
This flow limiter is substantially identical to that shown in FIG.
9 with the exception that the coupling 115 is hollow, and the first
and second channels 13 and 14 respectively passing therethrough are
contiguous.
[0066] It is to be noted that although the flow limiters shown in
FIGS. 8, 9 and 10 are described with specific reference to the
urine collection device shown in FIGS. 5 to 7, they may be used
equally with other urine collection devices, as will be apparent to
those skilled in the art.
* * * * *