CA2009840C - Full length compressible sleeve - Google Patents
Full length compressible sleeveInfo
- Publication number
- CA2009840C CA2009840C CA002009840A CA2009840A CA2009840C CA 2009840 C CA2009840 C CA 2009840C CA 002009840 A CA002009840 A CA 002009840A CA 2009840 A CA2009840 A CA 2009840A CA 2009840 C CA2009840 C CA 2009840C
- Authority
- CA
- Canada
- Prior art keywords
- patient
- sleeve
- limb
- sheath
- recited
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 4
- 230000006854 communication Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920002457 flexible plastic Polymers 0.000 claims 1
- 210000003414 extremity Anatomy 0.000 description 20
- 210000002414 leg Anatomy 0.000 description 20
- 210000002683 foot Anatomy 0.000 description 11
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000001225 therapeutic effect Effects 0.000 description 4
- 206010051055 Deep vein thrombosis Diseases 0.000 description 3
- 206010030113 Oedema Diseases 0.000 description 3
- 208000000558 Varicose Ulcer Diseases 0.000 description 3
- 206010047249 Venous thrombosis Diseases 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 2
- 230000003387 muscular Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- 206010040943 Skin Ulcer Diseases 0.000 description 1
- 208000025865 Ulcer Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 210000003423 ankle Anatomy 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 244000309466 calf Species 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002497 edematous effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000010729 leg swelling Diseases 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011176 pooling Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 231100000397 ulcer Toxicity 0.000 description 1
- 201000002282 venous insufficiency Diseases 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H9/00—Pneumatic or hydraulic massage
- A61H9/005—Pneumatic massage
- A61H9/0078—Pneumatic massage with intermittent or alternately inflated bladders or cuffs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2205/00—Devices for specific parts of the body
- A61H2205/10—Leg
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S128/00—Surgery
- Y10S128/20—Inflatable splint
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Pain & Pain Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Rehabilitation Therapy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Massaging Devices (AREA)
- Percussion Or Vibration Massage (AREA)
Abstract
A sleeve for applying compressive pressures against a patient's limb from a source of pressurized fluid, wherein the sleeve comprises a multi-layered sheath, having a proximal and a distal end. Generally parallel side edges extend between the proximal and distal ends, which side edges, on the proximal half of the sheath, are adjustably wrappable about the patient's limb, once it is inserted in the sleeve.
Description
BACKGROUND OF THE INVENTION
Field of the Invention This invention relates to pressurizable, multi-chambered, therapeutic devices, and more particularly to sleeves for applying compressive pressures against a patient's leg.
Dri r,r Try Blood flow in a patient's extremities, particularly the legs, markedly decrease during extended terms of confine-ment. Such pooling or stasis, is particularly acute in surgery and during recovery periods immediately thereafter.
Blood flow compressive devices, such as shown in U. S. Patents 4,013,069 and 4,030,488, develop and facilitate the application of compressive pressures against a patient's limbs and in so doing promoting venous return. The devices comprise a pair of sleeves which are wrapped about the patient's limbs, with a controller for supplying the pressurized fluid to the sleeves.
These sleeve devices may be seen in U. S. Patents 4,402,312 and 4,320,746.
' 64407-83 2Q~984 '1673 One use for the above mentioned sleeves is the prevention of deep vein thrombosis (DVT) whi;h sometimes occurs in surgical patients who are confined to bed. When a DVT occurs, ' the valves that are located within the veins of the leg can be damaged which i.n turn can cause stasis and high pressure in the veins of the lower leg. Patients who have this condition often have leg swelling (edema) and tissue breakdown (venous stasis ulcer) in the lower leg.
It has been shown that pneumatic compression can be highly effective in the treatment or such edema and venous ulcers. This treatment is usually performed by the patient themselves at home on a daily basis and requires that the patient be able to put on and remove the sleeves unassisted.
The sleeve devices which are wrappable from a flat configuration as shown in the aforementioned patents, are difficult to apply by the patients themselves.
Tt is therefore an object of the present invention, to provide a compressible sleeve device which is easily ut:ilizable at home by the patient himself.
A further object of the present invention is to optimise therapy for venous ulcers and edema associated with poor venous return.
SUMMARY OF THE INVENTION
The present invention provides a sleeve for applying compressive pressures against a patient's limb from a source of pressurized fluid, comprising: a multi-layered elongated sheath defining a plurality of generally limb encircling compressive chambers, said sheath having an open proximal end and a closed distal end, said sheath receiving a patient's limb through its open proximal end; said sheath having a front portion for juxtaposition with the front surface of a patient's limb, said sheath having a back portion for juxtaposition with the back surface of a patient's limb; said front and back portions of said sheath having transversely extending side elements, said side elements having a gripping edge thereon, said front portion having a gripping means thereon; said side elements being wrappable over and securable onto said front portion of said sheath to permit girthwise adjustability of said sleeve about a patient's limb.
In the preferred embodiment, the sleeve is comprised of a single elongated outermost sheet of flexible fluid-impervious material such as urethane-coated nylon. An "inner"
film of a suitable flexible material such as urethane is disposed against the upper side of the "outer" elongated sheet, having common sealed peripheral margins. The film is sealed with respect to the outer sheet to define a plurality of pressurizable chambers. The outer sheet is most preferably stiffer and inelastic relative to the inner film, thereby permitting the inner layer to conform appreciably better to the shape of the leg. Thus, the outer sheet will. remain rel.ativel.y ~. 200984.0 flat upon inflation while the inner film inflates and the areas of the film defining adjacent chambers press together, which in turn substantially inhibits zero pressure areas. The elongated sheet and attached film is folded upon itself along a trans-verse fold near its longitudinal. midpoint. The sheet is then joined along all of one and a portion of its other longitudinal edges when folded upon itself to leave one side open from the midpoint upwardly for ease of inserting the limb, thereby forming a two-layered sheath-like structure, open at its proximal end to define an inner film and outer sheet arrange-ment. A plurality of conduits are arranged in fluid communication with their - 3a -2Q~J9~
x'1673 respective chambers, each conduit terminating in a connector adjacent the open end of the sleeve.
The sleeve has a distal end which is closed by its transverse fold, for the enclosed emplacement of a patient's foot. An oblong or generally oval non-inflatable pad is preferably enclosed between the inner and outer sheets at the distal end or the sleeve, on top of the film, to provide a cushion base for the pati.ent's foot.
The outer film of the topmost layer is positionable over the front side of a patient's limb. An adhering or securement means is disposed along the front of the topmost layer.
The side edges of the topmost layer, from the proximal c:nd of the foot chamber, to the uppermost end of the sleeve, have an adhering strip attached therealong. The Longitudinal side portions of the sleeve include margins or flap portions which are foldable onto the adhering means, so as to adjustably encase the wearer's limb in the sleeve.
The topmost layer comprises a pair of longitudinally directed pressur:izable chambers which are in fluid cornrrunication with the pressurizable chamber above and alongside the patient's foot.
A longitudinally directed centrally disposed sight line may be arranged along the middle o.f the adhering means to permit the patient to line up the sleeve, so that the sight line is aligned up the middle of the limb, permitting most effective utilization of. the compressive chambers on the limb.
_ F1673 ~:hea the sleeve fully encloses a patient's limb, and the marginal side flaps of the sleeve are wrapped over and stuck to their respective sides of flue adhering means, the patient's limb i~ almost completely surrounded by inflatable chambers, awaiting sequential pressurization. However, the front of a patient's leg is bony and hence requires no pressurizable chambers. The important area is the muscular aces on the sides and bact: of a patient's leg, which contains tl-:e veins to which compressive pressure need be applied in accordance with this invention. The front side of the sleeve, which comprises the tongue portion thereof, is inelastic, so il that when compression occurs in the remainder of the sleeve and onto the leg, tension is applied across the curvature of the tongue which in effect translates into 'pressure over the radius of curvature along the front of a patient's leg.
_ ~ _ fF1673 ~' T3rief Description of The Drawings The objects and advantages will become more apparent when viewed in conjunction with the following drawings, in which:
Figure 1 is a perspective view of a full limb length cnrnpressible sleeve constructed according to the principles of the present invention;
Figure 2 is another perspective view of the sleeve shown ir~ Figure l, with a patient's limb depicted therein;
I
I
'' Figure 3 is a plan view of the elongated outer sheet, which when folded generally along its transverse mid-point, comprises the outer layer of the sleeve;
Figure i is a plan view of an inner film disposed upon th~~ cuter sheet having the chambers defined by seal margins between the inner film and the outer sheet; and Figure 5 is a plan view of the sleeve, with the inner and t.kie outer sheet joined at their appropriate peripheral locations.
Description of The Freferred Embodiment The present invention comprises an elongated compressible sleeve 10 for enclosing a patient's limb, such as a leg. The sleeve 10, shown in perspective view in Figure 1, includes a plurality of adjoining generally transversely extending fluid pressuri~able chambers 12, which are shown more clearly in Figure 4.
The sleeve 10 is comprised of an outermost flexible ~' fluid-impervious sheet 14, made of urethane-coated nylon, or the like, in an elongated form, as shown in Figure 3. The outermost sheet 14 has a first end 16 and a second or opposed end 18, each of which has a transverse dimension that narrows (tapers) slightly to a general mid-point of the sheet 14, def_in~d by a transverse fold line 20.
The sleeve 10 is also comprised of an innermost flexible fluid-impervious film 22, made of plastic material such as urethane, having a peripheral outline, as shown in Figure 4, which is generally similar to the configuration of the outermost sheet 14. As previously stated, the outermost sheet is stiffer and inelastic relative to the innermost film so that the latter conforms well to the shape of the leg while the former remains relatively flat upon inflation.
The film 22 has a first end 24 and a second end 26, each of which has a transverse dimension that nri-rows slightly to a general mid-point of tile film 22 defined by the common ~ transverse "fold" line 20. The peripheral outline ef the innermost film 22 is substantially the same as the periphery of the outermost sheet 14. Preferably, however, the length of _ 7 _ the film 22, to the right of the common "fold" line 20 as shown in Figure 4, is shorter than the corresponding length of the outer sheet 14, e.g. on the order of 20s shorter.
In both the outermost sheet 14, and the :innermost film 22 , the longer portion of each to one side of their common fold line 20, comprises the backside portion 17 of the sleeve having elongated side marginal portions 70 which wrap about the patient's limb from the backside thereat., which portions are to the left of the fold line 20, viewing Figure 2.
The innermost film 22 is placed over the outermost sheet 14, with their common fold line 20, and their first ends 24 and 16 also contiguous, as shown in Figure 4. The section of th~~ sleeve 10, to the right of the fold line 20, as shown in Figure 4, comprises the frontside portion 19, of the sleeve 10, when the film 22 and sheet 14 are folded along the fold line 20, onto the:;soi,~e;~, to fcr,~~ t a slo;:.-;o.
mhe innermost film 22 may then be sealed to the outermost sheea_ 1<~ generally at the periphery 23 of film 22 and at seal lines 32 which also define a plurality of longitudinally directed constant pressure chambers 12 between the innermost film 22 and the outermost sheet 14, the seal lines 32 and chambers 12 being shown in Figure 4 prior to the folding of the elongated sheet 14 and film 22 and subsequent peripiierai joining. Suitable sealing means, e.g. radi.o frequency (RF) sealing means, will be readily suggested to those skilled in the art.
A foot pad 36, of Generally oval shape, is.' non-pressurizably disposed between the sheet 14 and the film _ g _ 22, to form a cushion against which a patient's foot is placed, as may be seen in Figure 2. A front pressurizabl.e chamber 34, partially bifurcated, is disposed to the right of the fold line 20 of Figure 4, the front chamber 34 being in fluid communica-tion with a chamber 35 which extends around the side portions of the foot pad 36. The bifurcated chamber 34 eliminates any pressure chamber juxtaposed against the very forwardmost bony part of a patient's leg, when it is enclosed in the sleeve 10.
This in turn applies compression to the flat leg sections on either side of the forwardmost bony portion of the lower l.eg.
Since these flat leg sections are the sites of many ulcers, it follows that they are important areas for applying compressive pressure in accordance with this invention. The backside portion 17 of the sleeve 10 includes a lowermost pressurizable ankle chamber 38, an intermediate calf chamber 40, a first thigh chamber 42 and an upper thigh chamber 44. Each chamber 38, 40, 42 and 44 has an orifice 46 for the sequential pressurization and depressurization of those chambers, through a plurality of conduits 50, through a coupling adapter 51, which is in fluid communication through further conduits 53 with a compression generator, as identified in various patents including those referred to above. The chamber 35, disposed about the sides and forepart of the pad 36, as well as the pressurizable chamber 34 in the frontside of the sleeve 10, including the top of the foot, is maintained at a constant base pressure of about 10 pounds pressure, from a pressure generat-ing source as aforementioned.
_ g _ During assembly of the sleeve 10, the frontside 19 of the sleeve 10 is folded over onto the backside portion 17 of the sleeve 10, along their common fold line 20, and are joined, as - 9a -in the sequence and pressure profile created by the pressure ' generator aforementioned.
In view of the foregoing description and illustrative drawings, it will thus be appreciated that the present invention provides a therapeutic device for applying compressive pressure against the ieg, which device is easily applied and removed by the patient and is accordingly particularly suitable for home care.
Apart from this advantage, the construction and ~~ arrangement of elements of the therapeutic device of this I invention provides further significant advantages which can best be described by reference to the physiology of the patient's leg.
As was previously stated, the important area to be subjected to compression is the muscular area on the sides and particularly on the back of the leg. The front of the leg is bony and hence does not require this treatment. Accordingly, the front side of the sleeve, which comprises the tongue portion thereof, is not provided with sequential compression ch~;~bers. Moreover, the tongue portion is in~~lastic so that compression occurring at the back of the leg causes tension to be applied to the inelastic tongue portion which is in turn trznslated to pressure over the radius of curvature at the front of the leg.
It will also be seen from the foregoing description that there i.s no compression applied to the bottom of the foot.
Since blood dues not pool there, edema does not occur and consequently there is no need to apply compression. On the ~F1673 other hand, if the bottom of the foot portion were inflated to apFly compression, the resulting pressure patterns would be changed if the patient stood on his feet, which the patient is indeed permitted to do when wearing the therapeutic device of this invention.
Yet another important advantage is obtained from the use of an outer sheet which is relatively stiff and inelastic and an inner film which is soft and compliant. Apart from the fact that it is desirable to have an abrasion resistant outor surface, this combination of outer sheet and inner film permits the inner film to conform substantially to the shape of the individual leg. Accordingly, zero pressure points are substantially precluded, thus obviating the so-called corrugation affect typically seen when prior hospital compressible sleeve devices are used on edematous legs.
Field of the Invention This invention relates to pressurizable, multi-chambered, therapeutic devices, and more particularly to sleeves for applying compressive pressures against a patient's leg.
Dri r,r Try Blood flow in a patient's extremities, particularly the legs, markedly decrease during extended terms of confine-ment. Such pooling or stasis, is particularly acute in surgery and during recovery periods immediately thereafter.
Blood flow compressive devices, such as shown in U. S. Patents 4,013,069 and 4,030,488, develop and facilitate the application of compressive pressures against a patient's limbs and in so doing promoting venous return. The devices comprise a pair of sleeves which are wrapped about the patient's limbs, with a controller for supplying the pressurized fluid to the sleeves.
These sleeve devices may be seen in U. S. Patents 4,402,312 and 4,320,746.
' 64407-83 2Q~984 '1673 One use for the above mentioned sleeves is the prevention of deep vein thrombosis (DVT) whi;h sometimes occurs in surgical patients who are confined to bed. When a DVT occurs, ' the valves that are located within the veins of the leg can be damaged which i.n turn can cause stasis and high pressure in the veins of the lower leg. Patients who have this condition often have leg swelling (edema) and tissue breakdown (venous stasis ulcer) in the lower leg.
It has been shown that pneumatic compression can be highly effective in the treatment or such edema and venous ulcers. This treatment is usually performed by the patient themselves at home on a daily basis and requires that the patient be able to put on and remove the sleeves unassisted.
The sleeve devices which are wrappable from a flat configuration as shown in the aforementioned patents, are difficult to apply by the patients themselves.
Tt is therefore an object of the present invention, to provide a compressible sleeve device which is easily ut:ilizable at home by the patient himself.
A further object of the present invention is to optimise therapy for venous ulcers and edema associated with poor venous return.
SUMMARY OF THE INVENTION
The present invention provides a sleeve for applying compressive pressures against a patient's limb from a source of pressurized fluid, comprising: a multi-layered elongated sheath defining a plurality of generally limb encircling compressive chambers, said sheath having an open proximal end and a closed distal end, said sheath receiving a patient's limb through its open proximal end; said sheath having a front portion for juxtaposition with the front surface of a patient's limb, said sheath having a back portion for juxtaposition with the back surface of a patient's limb; said front and back portions of said sheath having transversely extending side elements, said side elements having a gripping edge thereon, said front portion having a gripping means thereon; said side elements being wrappable over and securable onto said front portion of said sheath to permit girthwise adjustability of said sleeve about a patient's limb.
In the preferred embodiment, the sleeve is comprised of a single elongated outermost sheet of flexible fluid-impervious material such as urethane-coated nylon. An "inner"
film of a suitable flexible material such as urethane is disposed against the upper side of the "outer" elongated sheet, having common sealed peripheral margins. The film is sealed with respect to the outer sheet to define a plurality of pressurizable chambers. The outer sheet is most preferably stiffer and inelastic relative to the inner film, thereby permitting the inner layer to conform appreciably better to the shape of the leg. Thus, the outer sheet will. remain rel.ativel.y ~. 200984.0 flat upon inflation while the inner film inflates and the areas of the film defining adjacent chambers press together, which in turn substantially inhibits zero pressure areas. The elongated sheet and attached film is folded upon itself along a trans-verse fold near its longitudinal. midpoint. The sheet is then joined along all of one and a portion of its other longitudinal edges when folded upon itself to leave one side open from the midpoint upwardly for ease of inserting the limb, thereby forming a two-layered sheath-like structure, open at its proximal end to define an inner film and outer sheet arrange-ment. A plurality of conduits are arranged in fluid communication with their - 3a -2Q~J9~
x'1673 respective chambers, each conduit terminating in a connector adjacent the open end of the sleeve.
The sleeve has a distal end which is closed by its transverse fold, for the enclosed emplacement of a patient's foot. An oblong or generally oval non-inflatable pad is preferably enclosed between the inner and outer sheets at the distal end or the sleeve, on top of the film, to provide a cushion base for the pati.ent's foot.
The outer film of the topmost layer is positionable over the front side of a patient's limb. An adhering or securement means is disposed along the front of the topmost layer.
The side edges of the topmost layer, from the proximal c:nd of the foot chamber, to the uppermost end of the sleeve, have an adhering strip attached therealong. The Longitudinal side portions of the sleeve include margins or flap portions which are foldable onto the adhering means, so as to adjustably encase the wearer's limb in the sleeve.
The topmost layer comprises a pair of longitudinally directed pressur:izable chambers which are in fluid cornrrunication with the pressurizable chamber above and alongside the patient's foot.
A longitudinally directed centrally disposed sight line may be arranged along the middle o.f the adhering means to permit the patient to line up the sleeve, so that the sight line is aligned up the middle of the limb, permitting most effective utilization of. the compressive chambers on the limb.
_ F1673 ~:hea the sleeve fully encloses a patient's limb, and the marginal side flaps of the sleeve are wrapped over and stuck to their respective sides of flue adhering means, the patient's limb i~ almost completely surrounded by inflatable chambers, awaiting sequential pressurization. However, the front of a patient's leg is bony and hence requires no pressurizable chambers. The important area is the muscular aces on the sides and bact: of a patient's leg, which contains tl-:e veins to which compressive pressure need be applied in accordance with this invention. The front side of the sleeve, which comprises the tongue portion thereof, is inelastic, so il that when compression occurs in the remainder of the sleeve and onto the leg, tension is applied across the curvature of the tongue which in effect translates into 'pressure over the radius of curvature along the front of a patient's leg.
_ ~ _ fF1673 ~' T3rief Description of The Drawings The objects and advantages will become more apparent when viewed in conjunction with the following drawings, in which:
Figure 1 is a perspective view of a full limb length cnrnpressible sleeve constructed according to the principles of the present invention;
Figure 2 is another perspective view of the sleeve shown ir~ Figure l, with a patient's limb depicted therein;
I
I
'' Figure 3 is a plan view of the elongated outer sheet, which when folded generally along its transverse mid-point, comprises the outer layer of the sleeve;
Figure i is a plan view of an inner film disposed upon th~~ cuter sheet having the chambers defined by seal margins between the inner film and the outer sheet; and Figure 5 is a plan view of the sleeve, with the inner and t.kie outer sheet joined at their appropriate peripheral locations.
Description of The Freferred Embodiment The present invention comprises an elongated compressible sleeve 10 for enclosing a patient's limb, such as a leg. The sleeve 10, shown in perspective view in Figure 1, includes a plurality of adjoining generally transversely extending fluid pressuri~able chambers 12, which are shown more clearly in Figure 4.
The sleeve 10 is comprised of an outermost flexible ~' fluid-impervious sheet 14, made of urethane-coated nylon, or the like, in an elongated form, as shown in Figure 3. The outermost sheet 14 has a first end 16 and a second or opposed end 18, each of which has a transverse dimension that narrows (tapers) slightly to a general mid-point of the sheet 14, def_in~d by a transverse fold line 20.
The sleeve 10 is also comprised of an innermost flexible fluid-impervious film 22, made of plastic material such as urethane, having a peripheral outline, as shown in Figure 4, which is generally similar to the configuration of the outermost sheet 14. As previously stated, the outermost sheet is stiffer and inelastic relative to the innermost film so that the latter conforms well to the shape of the leg while the former remains relatively flat upon inflation.
The film 22 has a first end 24 and a second end 26, each of which has a transverse dimension that nri-rows slightly to a general mid-point of tile film 22 defined by the common ~ transverse "fold" line 20. The peripheral outline ef the innermost film 22 is substantially the same as the periphery of the outermost sheet 14. Preferably, however, the length of _ 7 _ the film 22, to the right of the common "fold" line 20 as shown in Figure 4, is shorter than the corresponding length of the outer sheet 14, e.g. on the order of 20s shorter.
In both the outermost sheet 14, and the :innermost film 22 , the longer portion of each to one side of their common fold line 20, comprises the backside portion 17 of the sleeve having elongated side marginal portions 70 which wrap about the patient's limb from the backside thereat., which portions are to the left of the fold line 20, viewing Figure 2.
The innermost film 22 is placed over the outermost sheet 14, with their common fold line 20, and their first ends 24 and 16 also contiguous, as shown in Figure 4. The section of th~~ sleeve 10, to the right of the fold line 20, as shown in Figure 4, comprises the frontside portion 19, of the sleeve 10, when the film 22 and sheet 14 are folded along the fold line 20, onto the:;soi,~e;~, to fcr,~~ t a slo;:.-;o.
mhe innermost film 22 may then be sealed to the outermost sheea_ 1<~ generally at the periphery 23 of film 22 and at seal lines 32 which also define a plurality of longitudinally directed constant pressure chambers 12 between the innermost film 22 and the outermost sheet 14, the seal lines 32 and chambers 12 being shown in Figure 4 prior to the folding of the elongated sheet 14 and film 22 and subsequent peripiierai joining. Suitable sealing means, e.g. radi.o frequency (RF) sealing means, will be readily suggested to those skilled in the art.
A foot pad 36, of Generally oval shape, is.' non-pressurizably disposed between the sheet 14 and the film _ g _ 22, to form a cushion against which a patient's foot is placed, as may be seen in Figure 2. A front pressurizabl.e chamber 34, partially bifurcated, is disposed to the right of the fold line 20 of Figure 4, the front chamber 34 being in fluid communica-tion with a chamber 35 which extends around the side portions of the foot pad 36. The bifurcated chamber 34 eliminates any pressure chamber juxtaposed against the very forwardmost bony part of a patient's leg, when it is enclosed in the sleeve 10.
This in turn applies compression to the flat leg sections on either side of the forwardmost bony portion of the lower l.eg.
Since these flat leg sections are the sites of many ulcers, it follows that they are important areas for applying compressive pressure in accordance with this invention. The backside portion 17 of the sleeve 10 includes a lowermost pressurizable ankle chamber 38, an intermediate calf chamber 40, a first thigh chamber 42 and an upper thigh chamber 44. Each chamber 38, 40, 42 and 44 has an orifice 46 for the sequential pressurization and depressurization of those chambers, through a plurality of conduits 50, through a coupling adapter 51, which is in fluid communication through further conduits 53 with a compression generator, as identified in various patents including those referred to above. The chamber 35, disposed about the sides and forepart of the pad 36, as well as the pressurizable chamber 34 in the frontside of the sleeve 10, including the top of the foot, is maintained at a constant base pressure of about 10 pounds pressure, from a pressure generat-ing source as aforementioned.
_ g _ During assembly of the sleeve 10, the frontside 19 of the sleeve 10 is folded over onto the backside portion 17 of the sleeve 10, along their common fold line 20, and are joined, as - 9a -in the sequence and pressure profile created by the pressure ' generator aforementioned.
In view of the foregoing description and illustrative drawings, it will thus be appreciated that the present invention provides a therapeutic device for applying compressive pressure against the ieg, which device is easily applied and removed by the patient and is accordingly particularly suitable for home care.
Apart from this advantage, the construction and ~~ arrangement of elements of the therapeutic device of this I invention provides further significant advantages which can best be described by reference to the physiology of the patient's leg.
As was previously stated, the important area to be subjected to compression is the muscular area on the sides and particularly on the back of the leg. The front of the leg is bony and hence does not require this treatment. Accordingly, the front side of the sleeve, which comprises the tongue portion thereof, is not provided with sequential compression ch~;~bers. Moreover, the tongue portion is in~~lastic so that compression occurring at the back of the leg causes tension to be applied to the inelastic tongue portion which is in turn trznslated to pressure over the radius of curvature at the front of the leg.
It will also be seen from the foregoing description that there i.s no compression applied to the bottom of the foot.
Since blood dues not pool there, edema does not occur and consequently there is no need to apply compression. On the ~F1673 other hand, if the bottom of the foot portion were inflated to apFly compression, the resulting pressure patterns would be changed if the patient stood on his feet, which the patient is indeed permitted to do when wearing the therapeutic device of this invention.
Yet another important advantage is obtained from the use of an outer sheet which is relatively stiff and inelastic and an inner film which is soft and compliant. Apart from the fact that it is desirable to have an abrasion resistant outor surface, this combination of outer sheet and inner film permits the inner film to conform substantially to the shape of the individual leg. Accordingly, zero pressure points are substantially precluded, thus obviating the so-called corrugation affect typically seen when prior hospital compressible sleeve devices are used on edematous legs.
Claims (17)
1. A sleeve for applying compressive pressures against a patient's limb from a source of pressurized fluid, comprising:
a multi-layered elongated sheath defining a plurality of generally limb encircling compressive chambers, said sheath having an open proximal end and a closed distal end, said sheath receiving a patient's limb through its open proximal end;
said sheath having a front portion for juxaposition with the front surface of a patient's limb, said sheath having a back portion for juxtaposition with the back surface of a patient's limb;
said front and back portions of said sheath having transversely extending side elements, said side elements having a gripping edge thereon, said front portion having a gripping means thereon;
said side elements being wrappable over and securable onto said front portion of said sheath to permit girthwise adjustability of said sleeve about a patient's limb.
a multi-layered elongated sheath defining a plurality of generally limb encircling compressive chambers, said sheath having an open proximal end and a closed distal end, said sheath receiving a patient's limb through its open proximal end;
said sheath having a front portion for juxaposition with the front surface of a patient's limb, said sheath having a back portion for juxtaposition with the back surface of a patient's limb;
said front and back portions of said sheath having transversely extending side elements, said side elements having a gripping edge thereon, said front portion having a gripping means thereon;
said side elements being wrappable over and securable onto said front portion of said sheath to permit girthwise adjustability of said sleeve about a patient's limb.
2. The sleeve for applying compressive pressures about a patient's limb as recited in claim 1, wherein said front portion and said back portion of said sheath are joined along their common edges coinciding between said proximal end and said distal end, to define said sheath.
3. The sleeve for applying compressive pressures about a patient's limb as recited in claim 2, wherein said front portion and said rear portion have a common coinciding edge only partway along the length of the side of said sheath from said proximal end to said distal end, to permit openability of said sheath, facilitating entry of a patient's limb therein.
4. The sleeve for applying compressive pressures about a patient's limb as recited in any one of claims 1 to 3, wherein said back portion includes a cushion pad for the juxtaposition of a patient's foot thereagainst.
5. The sleeve for applying compressive pressures about a patient's limb as recited in claim 4, wherein a compressive chamber is disposed in said back portion of said sheath, about said foot cushion pad.
6. The sleeve for applying compressive pressures about a patient's limb as recited in claim 5, wherein a compressive chamber is longitudinally disposed in said front portion of said sheath, extending from the distal to generally the proximal end thereof.
7. The sleeve for applying compressive pressures about a patient's limb as recited in claim 6, wherein said compressive chamber about said foot cushion pad and said longitudinally disposed compressive chamber in said front portion are in fluid communication with one another.
8. The sleeve for applying compressive pressures about a patient's limb as recited in any one of claims 1 to 7, including a plurality of compressive chambers extending transversely across said back portion of said sheath including said side elements, so as to generally encircle a limb placed into said sheath when side elements are wrapped therearound.
9. The sleeve for applying compressive pressures about a patient's limb as recited in any one of claims 1 to 8, having a center line disposed longitudinally along the middle of said gripping means on the front portion to assist a patient in properly aligning said sleeve on his limb.
10. The sleeve for applying compressive pressures about a patient's limb as recited in any one of claims 1 to 9, wherein said multi-layered sheath comprises an innermost film of flexible plastic, and an outermost sheet of flexible material, which between them define said compressive chambers.
11. The sleeve for applying compressive pressures about a patient's limb as recited in any one of claims 1 to 10, including a plurality of conduits to duct air from a pressure source to said compressive chambers, at least one of said conduits ducting said air to more than one of said compressive chambers.
12. The sleeve as recited in any one of claims 1 to 11, wherein said multi-layered sheath comprises an outer sheet which is relatively stiff and inelastic whereby it remains relatively flat upon inflation by introducing said fluid within said compressive chambers; and an inner sheet which is soft and compliant, whereby upon inflation said inner sheet conforms substantially to the shape of said limb.
13. The sleeve as recited in any one of claims 1 to 12, wherein said front portion is adapted for placement against the bony front of a patient's leg, said front portion being substantially inelastic, whereby when compression occurs by introducing said fluid within said chambers, tension is applied across the curvature of said front portion, which tension translates into a pressure over the radius of curvature along the front of said leg.
14. The sleeve as recited in claim 13, wherein said inelastic front portion and said back portion of said sheath when secured to enclose a patient's leg provide means for filling the hollow portions at either side of said bony portion of the leg, whereby tension on said inelastic front portion will result in compression at that portion of the leg.
15. The sleeve as recited in claim 14, wherein said front portion is partially bifurcated.
16. The sleeve as recited in any one of claims 1 to 15, including a portion adapted to enclose a patient's foot when said elements are wrapped over and secured to said front portion, said foot portion in juxtaposition with the bottom of said patient's foot containing no compressive chamber and thereby being non-inflatable.
17. The sleeve as recited in claim 16, wherein said portion enclosing said foot contains cushion means for the bottom of said foot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002286493A CA2286493C (en) | 1989-03-16 | 1990-02-12 | Full length compressible sleeve |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/324,513 US4938208A (en) | 1989-03-16 | 1989-03-16 | Full length compressible sleeve |
| US324,513 | 1989-03-16 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002286493A Division CA2286493C (en) | 1989-03-16 | 1990-02-12 | Full length compressible sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2009840A1 CA2009840A1 (en) | 1990-09-16 |
| CA2009840C true CA2009840C (en) | 1999-12-28 |
Family
ID=23263926
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002286493A Expired - Lifetime CA2286493C (en) | 1989-03-16 | 1990-02-12 | Full length compressible sleeve |
| CA002009840A Expired - Lifetime CA2009840C (en) | 1989-03-16 | 1990-02-12 | Full length compressible sleeve |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002286493A Expired - Lifetime CA2286493C (en) | 1989-03-16 | 1990-02-12 | Full length compressible sleeve |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4938208A (en) |
| JP (1) | JP2870949B2 (en) |
| AU (1) | AU628917B2 (en) |
| CA (2) | CA2286493C (en) |
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| US27957A (en) * | 1860-04-24 | Show-case door | ||
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| FR1601003A (en) * | 1968-08-07 | 1970-08-03 | ||
| US4029087A (en) * | 1975-10-28 | 1977-06-14 | The Kendall Company | Extremity compression device |
| US4157713A (en) * | 1977-05-11 | 1979-06-12 | Clarey Michael T | Air-pressure splint |
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| US4370975A (en) * | 1980-08-27 | 1983-02-01 | Wright Edward S | Apparatus promoting flow of a body fluid in a human limb |
| US4874518A (en) * | 1985-11-01 | 1989-10-17 | E. I. Du Pont De Nemours And Company | Porous silica microspheres having a silanol enriched surface |
-
1989
- 1989-03-16 US US07/324,513 patent/US4938208A/en not_active Expired - Lifetime
-
1990
- 1990-02-05 AU AU49131/90A patent/AU628917B2/en not_active Ceased
- 1990-02-12 CA CA002286493A patent/CA2286493C/en not_active Expired - Lifetime
- 1990-02-12 CA CA002009840A patent/CA2009840C/en not_active Expired - Lifetime
- 1990-03-16 JP JP2066740A patent/JP2870949B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| AU628917B2 (en) | 1992-09-24 |
| JPH0347258A (en) | 1991-02-28 |
| CA2286493A1 (en) | 1990-09-16 |
| JP2870949B2 (en) | 1999-03-17 |
| CA2009840A1 (en) | 1990-09-16 |
| AU4913190A (en) | 1990-09-20 |
| CA2286493C (en) | 2004-06-15 |
| US4938208A (en) | 1990-07-03 |
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Legal Events
| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKEX | Expiry |