JPS5921812Y2 - a device that removes fluid from a wound - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction device and, more particularly, to an improved device for automatically removing fluid from a wound.

It is known to use suction devices to remove body fluids from wounds.

Such devices are used to reduce or remove body fluids that normally collect at the wound site after an injury.

Fluid that collects at the wound site, especially if it remains in a closed wound, can cause complications during the healing process, thus reducing the chance of recovery.

Moreover, a dry bath not only speeds up the healing process but also increases the size of the scar.

Typical known suction devices are U.S. Pat. No. 3,809,086, U.S. Pat.
No. 9677, No. 4058123, No. 408575
No. 1 and No. 4112947.

No. 3,809,086 is directed to a wound suction device comprising a container with a resilient sheet diaphragm sealed to its wall.

Movement of the diaphragm by the plate with the activation means reduces the volume of the container which creates a suction force upon release of the activation means.

A device is provided for locking the activation means in the position in which the elastic diaphragm remains displaced.

The device disclosed in US Pat. No. 3,845,765 includes a rigid outer container with a flexible bag.

The interior of the flexible bag communicates with the interior of the outer container so that the interior of the bag can be evacuated without constriction resulting in equalization of pressure inside and outside the bag.

The self-contained fluid ejector of US Pat. No. 3,889,677 includes a substantially rigid container having an inflatable member.

Means attached to the container are provided for inflating the inflation member.

The valve means responsive to the pressure difference between the inflation means and the inflation member causes a higher velocity of fluid flow into the inflation member than would otherwise exist.

U.S. Patent Nos. 4,058,123 and 4,112,947
No. 1, No. 1, No. 1, No. 1, No. 1, No. 1, No. 1, No. 1, No. 1, 2003, discloses a combined irrigator ejector for irrigating the wound with an irrigation solution and removing fluid from the wound.

The device includes a rigid housing defining a chamber, biasing means dividing said chamber into two parts, seating means for preventing fluid flow between the two parts, and means for accessing each part. There is.

Pressing the dividing means against its bias increases the volume of the irrigated portion.

Releasing the solution from the irrigated portion causes the dividing means to return to its original position under its bias.

In operation, the biasing means draws fluid from the irrigated portion into the wound, thereby extending the evacuation portion to exert a negative pressure and generate a flow of fluid.

Selective flow rate control means are provided to expel solution from the irrigate section while simultaneously introducing fluid from the wound into the drain section.

Preferably the dividing means is a resilient diaphragm.

U.S. Pat. No. 4,085,751 discloses a drainage device with a drainage collection chamber.

A liquid sealing chamber is provided above the collection chamber.

An opening in the earthen wall of the liquid seal chamber allows fluid to pass between the two chambers.

Fluid from the wound is passed into a liquid seal chamber having an initial volume of fluid so that it overflows from this chamber and into the drainage collection chamber.

Although each of the devices disclosed in the above-mentioned patents is effective in some respects, they generally have shortcomings.

The liquid collected with a typical suction device sometimes contains large numbers of viruses and other pathogens.

Persons handling such drainage devices during the collection and processing of body fluids are therefore exposed to the risk of infection during use.

Such a risk exists in the aforementioned US Pat. Nos. 3,809,086 and 3,889,677 which disclose the removal of collected fluids.

Furthermore, the suction drainage device, in which the suction means can communicate with the surroundings and the collection chamber, allows contamination of the wound by the ingress of bacteria, etc. along the suction-drainage flow.

U.S. Pat. No. 3,845,765 and U.S. Pat. No. 40,857
Communication between the No. 51 common suction means and the collection chamber is possible,
thus contaminating the wound.

Moreover, some typical known suction means have complex or costly structures as well as being difficult to operate.

U.S. Patent Nos. 3,809,086 and 4,058,123
No. 4,112,947 discloses multiple configuration biasing means.

Also, each of the above-mentioned U.S. Pat. No. 3,889,677 and other patents disclose preferred resilient members that increase the volume of the collection chamber when returned to its original position, creating a negative pressure.

Possible fatigue of these elastic members further reduces the reliability of such devices.

U.S. Pat. No. 3,845,765 and U.S. Pat. No. 40,857
No. 51 is limited to being operated upright as the fluid falls by gravity from a chamber located within.

The device of the present invention is intended to be an improvement over the prior art devices described above.

The device of the present invention was designed to provide an isolated pore-forming device to minimize contamination of the wound from collected body fluids.

The device is also designed to allow the use of a remote suction source that can operate at whatever degree of suction is required.

In another embodiment, the device may use a directly attached suction source, preferably a porta-pull bellows pump without the limitation of fixed suction means.

The device is economically designed to drain the wound during separation of the entire vacuum source for collection and disposal of bodily fluids, eliminating the risk of infection to the user.

The device of the present invention includes a housing having a side wall and at least one end wall provided at one end of the housing.

The interior of the housing is provided with an air-tight, liquid-tight, expandable and retractable passive member, the periphery of which is sealingly connected to the side wall of the housing.

The housing is thus divided into a first chamber and a second chamber, the first chamber being defined by the end wall.

The passive member extends toward the end wall and mates along the inside of the side wall of the housing.

Means are provided for pulling the passive member in a direction opposite the end wall of the housing, thereby increasing the volume of the first chamber and creating a negative pressure in the first chamber, so that fluid is removed from the wound. be done.

In one embodiment of the invention, the passive member is peripherally sealed along the edge of the other end of the housing, and a plate member is attached to the other end of the housing to seal the second chamber.

A remote suction means is attached to a hollow tube integral with the plate member and communicating with the second chamber.

When suction is applied through the tube of the plate member, the passive member contracts into the second chamber increasing the volume of the first chamber and creating a negative pressure.

A hollow tube integral with the end wall and in communication with the first chamber is connected to a conventional wound tube, one end of which is placed adjacent the wound to draw fluid into the first chamber.

In another embodiment, a resilient bellows is connected to the plate member to provide a portable, hand-held suction means.

Valve means simultaneously vent air within the bellows to the atmosphere when the bellows is compressed and prevent air from entering the second chamber.

Extension of the bellows then suctions the second chamber.

As a result, subsequent refilling of the bellows takes place without affecting the level of negative pressure in the second chamber.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a device for removing fluid from a wound having suction means isolated from collected bodily fluids for contamination-free drainage of the wound.

Another object of the present invention is to provide a device for removing fluid from a wound that can be used without infection by the user.

Still another object of the present invention is to provide a device for draining fluid from a wound that is inexpensive and can be disposed of entirely.

Yet another object of the present invention is to provide a device for removing fluid from a wound that is easy to use.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a typical embodiment of a device 10 according to the invention.

The device includes a generally cylindrical rigid housing 20 having a side wall 22 and an end wall 24 at one end thereof.

Preferably, the side walls 22 taper toward the end walls 24.

The other end of the housing 20 is open.

A resilient passive member 40 is disposed within the housing as shown in FIG. 2 and is attached at its periphery 41 to the edge 32 of the housing 20 in a fluid-tight manner.

This member 40 can be expanded and contracted from a bag-like expanded state to a contracted state.

In this expanded state, the passive member 40 is dimensioned to correspond to the tapered sidewall 22 of the housing 20 to form a bag-like structure as shown in FIG.

In this state, member 40 divides the interior of housing 20 into first chamber 38 and second chamber 42 .

The purpose of this will be explained later.

The end wall 24 has a central frustoconical portion 25 extending toward the open end of the housing 20 and terminating in a generally circular disc 26 having an opening 27 therein.

A hollow tube 28 which is integral with the disc 26 and extends from the disc away from the open end of the housing 20 and in alignment and communication with the aperture 27 communicates the first chamber 38 with the outside of the housing 20.

A cap 2 removably positioned on this hollow tube 28
9 is attached to the hollow tube 28 by a strand 30;
This strand terminates at one end in a ring 31 which is compressed into the hollow tube 28.

Cap 29 thus completely seals first chamber 38 from the outer periphery of the housing when attached to hollow tube 28.

A plate member 70 is sealingly attached to the open end of the housing 20, thereby sealing the second chamber from the outer periphery of the housing 20.

Referring to FIG. 2, the sealing of plate member 70 to the open end of housing 20 is shown in detail.

The plate member has a plate surface 72 which extends at its outer edge as a flange 71 which extends substantially across the plate surface.

A circular gasket is provided as shown in FIGS. 1 and 2.

A series of screws 7 provided on the inner surface of the plate flange 71
5 and a series of cooperating screws 35 on the outer surface of housing flange 33 serve to attach plate member 70 to the open end of housing 20, as shown in FIG.

In this state, gasket 73 forms a liquid-tight seal between the bottom surface of plate surface 72 and the upper edge of housing flange 33.

The plate member 70 has an open lower portion 7 in the center.

A hollow tube 78 that is integral with the plate member 70 and extends into the second chamber is aligned and communicates with the open lower portion 7.

The open lower portion 7 of the plate member 70 is useful when the second chamber 42 absorbs water.

This water absorption can be carried out by means of a drawing means arranged outside the housing 20 for drawing the member 40, ie, a suitable pipe (not shown) connected to the inter-side wall lower 7, and a suitable suction means (not shown). .

Alternatively, the hollow chamber 78 is connected to a suitable tube (not shown) extending upwardly from the outer surface of the plate member 70 and extending from the suction means.

This suction means includes, for example, an elastic bellows 8 having a substantially circular cross section and a diameter substantially equal to that of the plate member 70.
Start from 0.

The bellows has an upper surface 84 and a lower surface 86 that are generally parallel to each other and to the plate surface 72.

The lower surface 86 has a hollow tube 82 in the center, which is connected to the bellows 8.
0 and protrudes from the lower surface 86 and extends into the plate tube 78 as shown in FIG.

Tubes 78, 82 are suitably dimensioned to form an airtight seal between their respective contacting tube surfaces.

When the suction force is generated by the bellows 80, the plate member 70 includes an integral side wall 74 having a thickness substantially equal to the thickness of the plate member 70 and an outer diameter substantially equal to the diameter of the bellows lower surface 86. is preferred.

The upper edge 76 of the sidewall 74 is adjacent the bellows lower surface 86 to form a gap 94 .

The purpose of this will be explained later.

The bellows tube 82 has a hollow relief tube 87 which is connected to the tube 8.
2 and extending laterally from tube 82.

The relief pipe 87 communicates with the inside of the bellows pipe 82 and therefore with the inside of the bellows 80.

A one-way valve 90 is connected to the tube 82 at the end furthest from the bellows 80.
A bellows 8 is inserted sealingly into the second chamber to draw air from the second chamber.
Introduce into 0.

Additionally, another one-way valve 92 is sealingly provided in tube 87 to permit air to be exhausted from bellows 80 through gap 94 to the atmosphere.

The device 10 described above can provide a suction device that can be easily operated by a user.

Upon purchase of device 10, the user removes cap 29 and attaches a suitable tube (not shown) to tube 28.

The user then compresses the bellows 80 to activate the device 10.

During compression, the air inside the bellows flows through the bellows pipe 82 and the relief pipe 8.
7 and one-way valve 92 and further exits through gap 94 to the outside.

When the bellows is released, the elasticity of the bellows 80 stretches the bellows and admits air from the second chamber 42 through the one-way valve 90 and the tube 82 into the interior of the bellows 80.

However, one-way valve 92 seals during the evacuation of air from second chamber 42 and thus prevents air from entering bellows 80 from elsewhere.

The tube 82 is made substantially rigid and the lower surface 86 of the bellows
is prevented from contacting the upper edge of side wall 74 during compression of the bellows, thereby preventing air within the bellows from escaping into the environment.

Alternatively, holes may be provided in the side wall 74 to allow air to escape.

Suctioning the second chamber draws member 40 towards plate member 70, thus causing member 40 to contract.

At the same time, the volume of the first chamber increases, creating a negative pressure that creates a suction force that draws fluid from any device through conventional tubing into the first chamber.

If it is desired to recompress the bellows 80 during the process of drawing fluid from any device, valving means provided by one-way valves 90.92 will effectuate such refilling of the bellows, while creating a negative pressure and causing the bellows to recompress. Therefore, a level of negative pressure within the second chamber 42 is maintained.

During contraction of member 40 within housing 20, this member
8 to block suction to the second chamber 42.

To avoid this, the plate tube 78 can be provided with a notch 79 along the circumferential edge of the tube 78.

In this manner, the suction passageway of the second chamber 42 can be maintained even if the member 40 contracts to seal the opening of the tube 78.

Housing 20 is preferably made of transparent plastic and may be provided with etched graduations 110 as shown in FIG.

Thus, the user can visually confirm the proper operation of the device 10.

Additionally, the user can measure the amount of fluid collected and retained on the end wall 24 of the housing by means of the scale 110.

Preferably, housing 20, plate member 70 and member 40 are injection molded from a suitable plastic material.

Bellows 80 is made by blow molding.

Gasket 73 is preferably made of rubber and is mounted inside plate surface 72 to thereby secure plate member 70.
forms a liquid-tight seal when attached to housing 20.

Advantageously, the housing 20 is substantially rigid so that the device 1
The possibility of rolling zeros and inadvertent compression can be avoided.

Device 10 also forms a self-seal until cap 28 is placed to avoid the risk of infection to the user by eliminating the need for the user to empty device 10 after use.

If desired, the device 10 can be safely transported by the user to, for example, a pathology laboratory to test fluid removed from a wound without infecting the user.

The device 10 also prevents possible bacterial contamination of the surrounding area to avoid wound contamination.

The passive member 40 separates the suction means, eg the bellows 80, the interior of which is in contact with the surroundings during filling, from the first chamber 38 and thus from the wound.

The device 10 disclosed herein is posture independent and can be used in any position.

If desired, a loop 88 is attached to the top surface 84 of bellows 80 to attach device 10 to a patient.

This allows the patient to move freely with the device 10 attached.

The final assembly of device 10 is not limited to the means described above.

A valve 90.92 provided in tube 82 and on tube 87 for liquid tightness is integrated into each tube 82.87.

Instead of being screwed onto the outer surface of the housing flange 33, the plate member 70 can also be configured without the screws 35, 75 so that the plate surface 72 is crimped onto the housing flange 33 in a fluid-tight manner.

Apart from this, the plate surface 72 is connected to the housing flange 33.
It can also be integrated or ultrasonically welded.

However, the passive member 40 is preferably ultrasonically or thermally welded to the edge 32 of the housing 20.

Assembly of device 10 may be accomplished by other conventional means, including but not limited to monolithic, crimping, or ultrasonic welding.

Referring to FIG. 3, a plurality of housings 20 are shown stacked such that their tapers correspond to the shape of the passive member 40.

In this configuration, the housing 20 is stocked until needed.

A cap 29 on the housing tube 28 maintains sterility inside the first chamber 38.

When it is necessary to remove fluid from the wound, the housing 2
0 is removed from the other stacked housing 20.

A plate member 70, preferably having a bellows 80, is attached to the housing 20 to seal the second chamber 42.

Cap 29 is removed and a conventional wound tube (not shown) is connected to housing tube 28.

The device is then activated by compression of the bellows 80 to draw fluid from the wound into the first chamber 38.

In another embodiment (not shown), the disc 26 is made of rubber and is a hollow, thin-walled needle (not shown).
has a thickness that extends through the disk 26 at one end.

This disc maintains a fluid-tight seal around the wall of the needle in contact with its rubber.

The needle has a diameter suitable for passing body fluid into the first chamber 38.

The needle is attached at its other end to a conventional tube that communicates with the wound to be evacuated.

In this configuration, sterile conditions within the first chamber 38 are maintained throughout the operation of connecting the device 10 up to the normal wound canal.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of the device according to the present invention, and Fig. 2 is a partial sectional view of the device according to the present invention.
FIG. 3 is an enlarged partial sectional view of the figure and a vertical sectional view showing another embodiment. DESCRIPTION OF SYMBOLS 10... Device, 20... Housing, 38... First chamber, 40... Passive member, 42... -Second chamber.

Claims (1)

[Scope of utility model registration request] a housing having a side wall and at least one end wall at one end of the side wall; an inelastic passive member having a periphery and expandable and contractible; and a pulling means for pulling towards the end, the passive member being airtight and liquid tight within the housing to airtightly separate the interior of the housing into a first chamber and a second chamber. the passive member is arranged such that its periphery is sealingly attached to the side wall of the housing, and the passive member extends toward the end wall of the housing and has an enlarged position substantially corresponding to an inner surface of the side wall of the housing; and a contracted position in which the passive member is pulled in a direction opposite to the contracted position, and the pulling means increases the volume of the first chamber by pulling the passive member toward the contracted position. A device for removing fluid from a wound, the device increasing to create a negative pressure in the first chamber.