Note: Descriptions are shown in the official language in which they were submitted.
33~i~
~IODULAR TIIOI~AC~C DRAINAGE U~LT
BACKG~OUND OF Lllr, I~VENL`LON
This invention relates to ~horacic drainage devices and more
particularly to thoracic drainage devices oE ~he disposable plastic type
Thoracic drainage devices of the one, two, three and four-bottle
types are described in U.S. Patent No. 3,757,783, which is assigned to the
same assignee as the present application. Also, U.S. Patent ~o. 3,783,870
describes a plastic disposable drainage device of the four-bottle type.
Reference to these patents may be had Eor a basic explanation of drainage
devices.
In the past, glass bottles or jars have been provided with -
suitable stoppers and tube connectors adapted to be arranged to perform fluid
drainage from the pleural cavity Preformed plastic disposable drainage
devices have also been used in order to overcome some of the disadvantages
of the glass bottle type. For example, plastic thoracic devices do not
break, and since they a}e formed as an integral or single unit, are readily
connected with a patient. They are also light weight, and chnnot separate ;~
; during use. However, such plastic drainage devices have certain disadvantages,
for example, they cannot be economically used to selectively provide various
systems such as the one, two, three and four-bottle systems mentioned above
without employing the entire device for each of the various systems.
SUMMARY OF THE INVENTION
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Accordingly, an object of the present invention is to provide
; a drainage device wherein the above-mentioned disadvantages are substantially
obviated
More specifically, it is an object of the present invention to `
provide thoracic drainage apparatus having a plurality of preformed hollow
plastic members which are quickly and easily interconnected together by simple
and reliable means to provide an efficient and economical drainage system
30 and wherein they can be selectively connected to form "one", "two", "three" ~ ~`
or "four-bottle" chamber type thoracic drainage systems while using only the
desired number of chamber members.
In accordance with the principal object, the invention contem-
plates a thoracic drainage apparatus which comprises first and second hollow
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plastic members each l-aving an internal chamber, and each having integral
connector means connecting the chambers of the members in Cluid communi-
cation with each other, The chamber of the first member has an inlet
adapted to be connected in fluid communication with a cavity Or a patient
for recciving drainage Eluid from the cavity, The chamber of the second
member is partitioned by an integral wall into first and second channels .
interconnected at the ]ower ends thereof for receiving a liquid. ~ gas
outlet is provided with means for connecting a source of negative pressure
to the gas outlet, The first channel is connected in fluid communication
with the chamber of the first member and the second channel is connected
in fluid communication with the gas outlet whereby gas from the cavity
can pass through the liquid to the outlet, A third hollow plastic
member is provided defining a pressure regulating manometer chamber
with an integral wall dividing it into first and second channels
interconnected at the lower ends thereof for receiving a liquid.
An integral connector means on the third member connects the first
manometer channel in fluid communication with the second channel of the
second member. The second manometer channel is open to atmosphere whereby
the third member is adapted to limit the pressure at the gas outlet. A
means locks the members together to prevent separation thereof,
These, as well as other features and advantages of the present
invention, will become apparent from the following detailed description
and accompanying drawings.
BRIEF DESCRIPTION OF T~IE DR~WINGS
Figùre 1 is a side elevation of a drainage apparatus in accordance
with the present invention shown connected as a "four-bottle" thoracic device;
Figure 2 is a vertical section of the device of Figure 1 on an
enlarged scale; '
; Figure 3 is an enlarged cross-sectional view taken along line 3-3
30 of Figure l; ~
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F-Lgure 4 i5 an elevational y-~ew of a "one-bottle" thor~cic ~`~
device utiLizing one of the chamber me~bers of Figure l;
Figure 5 ls an elevat-~onal view of a "two-bottle'l thoracic
device utilizing two of the chamber members oE the deyice s~hown in
Figure l; and
Figure 6 is an elevational view of a "three-bottle" thoracic
device utilizing three of the chamber members of the device of Figure 1.
DESCRIPTION OF THE PREFERRED E~BODIMENT
Referring now to the drawing, and particularly to Figures 1 and 2,
there is shown drainage apparatus, indicated generally at 7, which includes
four separate "bottles" or chamber members 8, 9, 10 and 11 having internal
chambers 12, 14, 16 and 18, respectively, that are interconnected to
form a "four-bottle" or four-chamber thoracic drainage device. Chamber
12 is a drainage collector chamber for receiving and collecting drainage
from a patient; chamber 14 is an underwater seal or series liquid seal -
which passes gas from the patient; chamber 16 is a liquid pressure control
or regulating manometer; and chamber 18 is a liquid direct reading manometer -~
and secondary seal.
Drainage collector chamber 12 is preformed wlth a drainage
inlet port 19 connected to an integral inlet tube coupling member l9a
which receives tubing 20 connected with a catbeter 21, the distal end of `
which is adapted for insertion within the pleural cavity of a patient for
draining fluids and gases. Chamber 12 is partitloned by integral walls
21a and 21b into three channels or columns 12a, 12b, and 12c whlch fill
successively with drainage liquids from a patient. Inlet port 19 is
located directly above channel 12a so that this channel ls first to fill
with drainage fluid. Adjacent the upper end of chamber 12 is a gas outlet
22 connected to an integral outlet tube coupling member 22a coupled by a short
length of tubing 24, for example7 plastic tubing, to an inlet port 26 of -
chamber 14 by means of an integral inlet coupling member 26a of chamber 14.
The liquid seal chamber 14 is preformed with an integral partition
wall 25 dividing the chamber into a relatively narrow vertically extending
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column or channel 27 of relatiyely small volume~ ~nd ~ ~elatively wide
column or channel 28 of relatively large volume~ The upper end of channel
27 ls connected in fluld communication with the inlet 26 at its upper end
by means of an enlarged circuitous path or liquid trap 27a, and at its
lower end to the chamber 28. ~ predetermined amount of liquid, such as
water 29, is disposed in the chan~ber 28 so that the lower end of the par-
tition 25 extends into the water, the lower ends of the columns 27 and 28
defining a liquid reservoir for the water. Channel 28 is provided with an
outlet port 30 connected with an integral outlet connector or coupling
member 30a which is adapted to be connected in fluid communication with a
negative pressure pump or vacuum source 32 by means of a tube, such as
plastic tubing 33 connected to member 30a. ;~
The liquid seal chamber 14 is also provided with a fluid pressure
relief gas or air inlet port 34 connected with an integral connector 34a
at the top of the column 14 adjacent the outlet 30. The pressure relief
port 34 is connected to an air inlet port 36 of the chamber 16 by an
integral connector 36a adjacent the top of the control manometer chamber
16. The connector 34a is shown connected to connector 36a of the regulating `
manometer chamber 14 by means of a plastic connecting tube 37.
The regulating manometer chamber 14 is provided with an integral
partition 38 which dlvides it into a relatively narrow vertically extending
column or channel 40 of relatively small volume and a relatively wide
column or channel 42 of relatively large volume. The channel 42 is connected
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in fluid communication with the connector 36a and therefore with the
negative pressure outlet 30 at the upper end of the liquid seal chamber
14 and the pump 32 (Fig. 1). The relatively narrow channel 40 is connected
- in fluid communication at the upper end thereof to a vent or air inlet port
43 open to atmosphere. Channel 40 is connected with the relatively large
chamber 42 adjacent its lower end. The lower ends of columns 40 and
42 define a liquid reservoir for water 44. The height of water in the
liquid control manometer determines the maximum pressure available at the
outlet 19 regardless of pump pressures above a predetermined amount, as is
well known by those skilled in the art.
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The direct reading manometer and secondary seal chamber 18 is
identical to the control manometer chamber 16. Chamber 18 is provided
with an upper integral inlet connector 48 which is connected by me~ans of
plastic tubing 49 to another integral connector 50 in the upper portion of
the drainage collector chamber 12. The chamber 18 is divided by an integral
partition wall 18a into a relatively narrow vertical column or channel
52 and a relatively large column or channel 54. Channel 52 is connected
in Eluid communication with the inlet connector 48 at the top and with
the channel 54 at the bottom The lower ends of channels 52 and 54 serve
as a liquid reservoir for liquid such as water 58. Channel 54 is open
to atmosphere by means of an integral connector 56 at its upper end. The
chamber 18 serves as a direct reading liquid manometer which is connected
directly in fluid communication with the collector chamber 12, and hence
the pleural cavity of the patient, and to atmosphere so as to provide
a continuous precise reading of the pressure in the cavity of the patient.
Chamber 18 also serves as a secondary liquid seal which is connected
to atmosphere in by-pass relation with the liquid seal chamber 14, whereby
a patient may, under surge conditions, expel air from the pleural cavity,
for example, without the necessity of requiring substantial pressures
necessary to move air through the series liquid seal chamber 14 and the
liquid regulating manometer 16 should the pump fail and close the outlet
30 The function and advantages of the liquid seal feature of chamber 18 ;~;
are described in greater detail in applicant's previously mentioned U.S ~;
Patent No. 3,757,783, and the function of the chamber 18 as a direct reading
liquid manometer is given in greater detail in applicant's previously
mentioned U.S. Patent No. 3,783,870.
As described above, the chambers 12,14, 16 and 18 are inter-
connected in fluid communication by means of integral connectors and
relatively short pieces of tubing in the illustrated embodiment. However,
30 these connections may be formed by integral connectors fitting one within ~;
the other~ for example, by making each such piece of tubing an integral
portion of one of the chamber members For example, tubing 24 may be formed
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integrally with the connector 22a as ~ r~latlvely 1exible p~rt of chamber
12, and the connector 26a, integral with l-~qu~d se~l chamber 14 may be
inserted directly into the ~ntegral flexiBle part. The ~ntegral connectors
and tubing elements provide a s~mple and effective means for manually
releasably connecting the chambers in Eluld communicatton w~th each other.
While these integral connectors and tubing connections tend to
hold the chamber members 8, 9, 10 and 11 together, the present device
provides additional means by which the members are securely held together
to avoid any possible inadvertent opening in any of the fluid paths. This
is accomplished in the illustrated embodiment by providing a plurality of
locking or clamping elements shown as connecting pins 60 extending between
adjacent portions of the chambers. ~-
The chamber members 8, 9, 10 and 11 are shown provided with
integral tabs or extensions indicated respectively at 61a, 61b, 61c and
61d, and each tab is provided with a hole 62. When an adjacent pair ~ ~
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of chamber members are in proper orientation and in fluid communication
with each other, each of the tabs 51 on one of the members extends over
.
a portion or tab 61 of the adjacent chamber member with the holes 62 ~ --
in aligned relation to receive a connector pin 60, for example, as shown -
in Figure 3. In Figure 3, a pin 60 is shown extending through a tab
61c of the regulating manometer chamber member 10 and a tab 61b of the
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liquid seal chamber member 9. Each pin 60 is enlarged intermediate its ~;
ends so that when pushed through the aligned holes 62 in the adjacent
; chambers, the enlarged portion forms a tight frictional engagement with
hole 62 tending to hold the ad~acent overlapping portions or tabs in
tight frictional engagement. However, it is preferable to also position `;
a pin locking member 70, such as a star locking washer which may be
formed of a resilient metal, over the end of each pin opposite the head ~ -
with the locking member digging into the pin to further insure that the ~ ;
pin cannot fall out.
In illustrated embodiment, the liquid seal chamber member 9
is connected in fixed relation with the collector chamber member 8 by means ~¦
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oE a pin 60 at the upper end thereof adjacent the irllet 26 and also by
a pin 60 at the botto~ ends of the two chambers, The l~quld mano~eter
chamber mem~er l0 ls similarly connected by ptns 60 ~lth the l~quid
seal chamber member 9. Ltkewise, the direct reading manometer and
secondary liquld seal chamber ~em~er ll is connected by a pair of pins
60 ad~acent opposite ends thereof to the member 8. By connecting the
chambers by means of integral fluid flow connectors and tubing, and pins
60 extending through adjacent overlapping portions or tabs on ad~acent
chamber members, the cham~ers are maintained secured in fixed relationship
with each other and in fluid communication for proper operation. The
chamber members 8-ll may be disassembled, of course, by removing the pins
and the fluid coupling tubing elements between members.
In the four-bottle thoracic drainage system shown in Figures l
and 2, the liquid regulating manometer lO provides a desired negative fluid
pressure at the outlet connector 30 so that drainage from the pleural
cavity of the patient flows into the collector chamber 12 and air or gas
from the cavity flows through the liquid 29 in seal 14 to the outlet 30
and pump 32. The liquid manometers 16 and 18 are provided with indicia or
calibration marks 80 and 85, respectively so that the liquid in the
columns may be read. The pressure of the regulating manometer will be
somewhat different from that of the direct reading liquid manometer 18
because of the pressure drop across the liquid seal. ~ ~
In Figure 4, chamber member 8 is used alone, the collector chamber ~ ;
12 being provided with a predetermined amount of water such as to a level
indicated by a level mark 89. A connecting tube 87 is shown in fluid
communication with tube 20 and connector l9a and has its lower end
disposed below the surface of the liquid. The upper connector 22a is open
to atmosphere to allow air or gas to escape through the liquid to atmosphere.
The connector 50 may be closed by a closure cap 88. With this arrangement
liquid in the chamber 12 provides a seal and drainage flows into chamber 12
due to gravity. In the "one-bottle" system of Figure 4, the lower end of
tube 87 is positioned a predetermined distance below the water fill level
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89 so that drainage liquld ~Lrst f~lls channel 12a and then flow~ oVer
partition 21a to fill the next successive channel 12b. In thls way,
the lower end of tube 87 ls disposed a constant distance belo~ the liquid
level in channel 12a after ~t ls filled to provlde a substantlally
constant reaction force to the flow of fluid from the patient. In the
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prior art "one-bottle" systems, the force opposing the flow of fluid
from the cavity increased as the liquid ln the collector chamber filled.
Thus, this one-bottle system provides a substantially constant, relatively
small reaction force to the flow of fluid Erom the patient.
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In Figure 5, a "two-bottle" system is illustrated. In this
embodiment, the collector chamber 12 and the liquid seal chamber 14
are connected together in fluid communication with each other by means of
connectors 2~a, 26a and tube 24, as in the device of Figure 1. The ~-
outlet 30a is open to atmosphere in this case, and the connectors 50
and 34a are closed by cap 88 and another cap 89, respectively. Chamber 12
is not filled with water in this case since liquid seal chamber 14 is
connected to it. Fluids drain by gravity into collector chamber 12 of
.
member 8 and gas or air passes through liquid seal chamber 14 to atmosphere.
In the "three~bottle" system of Figure 6, the chambers 12, 14
and 16 are interconnected and the outlet 50 is sealed off by cap 88 since
the direct reading manometer is not used. In this case, the outlet 30a
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is connected to the negative source of pressure 32 by tube 33, and the
pressure regulating manometer is connected to the liquid seal to limit
~he pressure applied to the collector chamber. The operation of this `
system is similar to that previously mentioned herein in connection with
the device shown in Figure 1 except for the function of member 11.
In each of the various systems it will be apparent that each chamber
is easily connected to each other in fixed relationship and in the desired
fluid communication connection, and that the various one-bottle, two~bottle,
three~bottle, and four~bottle thoracic drainage devices can be selectively
assembled while using only the necessary chamber member or members. Since
the members 10 and 11 are identical, a "four~bottle" arrangement such as shown
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in Figure 1 can be assembled from onl~ three different klnd~ pf chamber
members whlch reduces cost. The members 10 and 11 can be made, for example, `
from the same mold and subsequently-provlded with different calibration
marks (80,85).
To further stiffen the asse~bled chambers, a pair of tabs 90
integral with member 8 are shown extending over opposite surfaces of
an extension on chamber member 9 to cla~p the extension further stabllize
the device and make it even more rigid.
Each of the chamber mem~ers 8, 9, 10 and 11 is formed of a plastic
material, such as polypropylene, and each ls formed individually as a ;
separate unitary member. Each member is preferably transparent or trans-
lucent so that the liquid in them can be seen. Each may be formed by
a blow molding process or, alternatively, may be formed from a pair of
mirror image plastic elements molded separately and then sealed together, ;~
such as by heat sealing or other suitable means.
While a preferred form of the invention has been described herein, ~ -
it will be apparent that various changes and modifications thereto may be
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made without departing from the spirit of the invention or scope of the
;~ invention as defined in the appended claims. ~ ~
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