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EP0228768B1 - Medical appliance for the hand - Google Patents

Medical appliance for the hand Download PDF

Info

Publication number
EP0228768B1
EP0228768B1 EP19860307731 EP86307731A EP0228768B1 EP 0228768 B1 EP0228768 B1 EP 0228768B1 EP 19860307731 EP19860307731 EP 19860307731 EP 86307731 A EP86307731 A EP 86307731A EP 0228768 B1 EP0228768 B1 EP 0228768B1
Authority
EP
European Patent Office
Prior art keywords
sealed
hand
medical appliance
thumb
panels
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
Application number
EP19860307731
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0228768A2 (en
EP0228768A3 (en
Inventor
Arthur Michael Newsam Gardner
Roger Harrington Fox
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novamedix Distribution Ltd
Original Assignee
Novamedix Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Novamedix Ltd filed Critical Novamedix Ltd
Publication of EP0228768A2 publication Critical patent/EP0228768A2/en
Publication of EP0228768A3 publication Critical patent/EP0228768A3/en
Application granted granted Critical
Publication of EP0228768B1 publication Critical patent/EP0228768B1/en
Expired legal-status Critical Current

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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
    • A61H2205/06—Arms
    • A61H2205/065—Hands

Definitions

  • This invention relates to a medical appliance, and particularly to an appliance for applying local pressure to a part of the hand for the purpose of stimulating blood circulation through enhanced venous-return flow.
  • Such medical appliances comprise a double-walled sheath adapted to fit over a limb, for example, an arm or a calf and foot to be treated, and a pump apparatus arranged to inflate and deflate the sheath cyclically, thereby to apply a pumping action to the limb and thus assist venous blood-flow therein.
  • a particular disadvantage of such known devices is that they cannot be used when the limb to be treated is also to be encased in a plaster cast. Also, they are of inherently large-volume capacity with large area coverage of the involved limb, so that their action is on an entire limb; large-capacity pumping apparatus is required for administration of an inflation/deflation cycle, and more than one pump region may be activated simultaneously, to the detriment of achieving optimum venous-return flow. In particular, these known devices do not permit localized application of pumping pressures.
  • venous-pump mechanism in the region of the hand which is essentially limited to the proximal phalanges of the digits and thumb, and to the adjacent region of the palm; this mechanism is naturally brought into operation upon a tight doubling of the fist, whereupon venous-return flow ensues from the entire arm.
  • a tight fist squeezes this region, which is a major locale of blood accumulation, i.e., in readiness for venous return through the arm.
  • venous-return flow may be efficiently stimulated, even in the case of a degree of venous obstruction in the wrist or elsewhere in the involved arm.
  • the invention achieves the above objects by localizing the periodic application of squeezing force, essentially limited to the phalanx of the digits and thumb, and to the adjacent region of the palm of the hand.
  • an inflatable mitt is applied to the said proximal phalanges and adjacent regions, with extremities of digits and thumb projecting beyond the mitt.
  • the mitt may be wrapped with suitable fabric, such as surgical gauze or muslin, to provide a circumferential tie of the inflatable regions, the tie providing hoop-tension reference for inward application of a squeezing pressure/release cycle; and the squeeze is applied in unison circumferentially around each of the individual digits (and thumb) at the phalanx region.
  • suitable fabric such as surgical gauze or muslin
  • the inflatable mitt may be embedded in an orthopedic cast, without impairing the application of pulsed pressure local to the indicated region; in this case, the circumferential tie is provided by the cast.
  • a medical appliance for applying a venous return flow pumping pressure to a human band comprising at least one inflatable sealed enclosure attachable to said hand, and means for selective admission of inflation pressure fluid into said enclosure to apply said pumping pressure characterised by means for securing the or each sealed enclosure to the human hand to form an inflatable mitt having five truncated tubular fingers for engaging the proximal phalanxes of the fingers and thumb of the hand such that on inflation of the mitt a local squeezing action is applied essentially limited to veins of said proximal phalanxes and ajacent regions of the hand to promote said venous return flow.
  • an inflatable mitt 10 which comprises two like inflatable bags 11-12 of flexible material, secured to each other only at certain points, and each of the bags is served by its own pipe or supply connection 13-14.
  • These connections 13-14 are in turn served in unison by a single pumping apparatus 15, with sufficient capacity and control to deliver pressure fluid with full application of squeezing pressure to the hand-pump region of the hand, in one second or less, as will be more fully discussed in connection with Fig. 7.
  • the pressure fluid is suitably air.
  • the bags 11-12 may be image duplicates of each other. As shown, bag 11 comprises inner and outer panels 16-17 of like peripheral contour bonded continuously around the periphery and to the pressure-fluid connection tube 13. A continuous heat seal, indented by reason of local compression for greater reinforcement of the bonding, follows a peripheral course 18, which is delineated by stippling in the drawing.
  • each of the panels 16-17 is cut follows a forward or distal contour 19 which is designed to lap the first phalanges bones and, generally speaking, conforms to the alignment of the joints between first and second phalanges bones for a flattened hand, so that both panels 16-17 cover the phalanx of the digits of the hand (i.e., the first phalanges bones of all digits).
  • the forward contour 19 merges with a thumb-side or lateral contour 20 which laps or traverses the joint between the phalanges of the thumb; the forward contour 19 merges at its other end with an opposite-side or lateral contour 21 which extends to proximal-lateral juncture with the supply tube 13; and both lateral contours 20-21 merge with a proximal transverse contour 22 which also extends to proximal-lateral juncture with tube 13.
  • bonded tab formations 23-24 of panels 16-17 extend in laterally opposite directions from proximal regions of the lateral contours 20-21.
  • the peripheral course 18 of the continuous reinforcing seal of panels 16-17 is characterized by limited longitudinal adjacency to pipe 13 at A (Fig. 2), truncation of tab 23 at B, a first inward lobe at C between thumb and forefinger locations, similar but more narrow lobes at D-E-F between adjacent digits, truncation of tab 24 at G, and finally by limited longitudinal adjacency to pipe 13 at H.
  • the inner panel 16 may be of porous material or may be perforated for limited escape of inflation fluid during intervals between pulsed inflation, thus producing a cooling action upon adjacent skin; and as a further comfort to the patient, the skin-contacting surface of panel 16 is preferably flock-coated, as suggested by stippling at 29 in Fig. 2A.
  • the other bag 12 may be of construction identical to that of bag 11; however, for the case of a flock-coated skin-contacting surface 29' of bag 12, the construction identity is a mirror-image identity. Corresponding parts of bag 12 are given the same number identification as for bag 11, but with primed notation.
  • the mitt 10 becomes a unitary article upon bringing both bags 11-12 in mirror-image adjacency and registration of locating apertures 27-28 of the respective bags.
  • compression heat-sealing is effected marginally outside the seal course 18, locally at B', and at C', D', E', F', and G', thus establishing intervening unsealed peripheral spaces (between bags 11-12), which spaces enable individual thumb and digit passage, to develop the inserted-hand condition of Fig. 1.
  • seals B'-C' must be sufficient for circumferential embrace of the thumb, while the spans between adjacent distal ends of seals C'-D', of seals D'-E', of seals E'-F', and of F'-G', must also be sufficient for circumferential embrace of the respective digits which individually pass therethrough.
  • the mitt of Figs. 1 to 3 is selected for size appropriate to the hand size and hand condition of the patient. For example, a severely swollen hand may call for a mitt of larger size than the patient might otherwise require.
  • the appearance will be as depicted in Fig. 1, with sealed alignments C'-D'-E'-F' extending deep into each crotch between the thumb and the forefinger and between adjacent digits.
  • the tabs 23-24 of bag 11 are drawn toward each other and are adhesively secured to panel 17, as by first removing local protective strips 23"-24" to expose a local coat of pressure-sensitive adhesive, and then drawing the tab inwardly to effectively narrow the proximal or wrist-end opening of the mitt.
  • a similar local fastening of corresponding tabs 23'-24' of bag 12 to the outer panel 17' of bag 12 will aid in adapting the wrist opening to the patient.
  • a circumferential tie may then be developed by orthopedic-cast techniques, if necessary around all or part of the mitt, making sure that the tube connections 13-14 become externally accessible for service connection to the inflation pulsing means 15. In the form shown, however, it is assumed that a cast is not necessary, at least in the region of the mitt, and in Fig.
  • surgical gauze or muslin 30 may be wrapped around the palm and dorsum and over the phalanx region of the digits and thumb, thus establishing a circumferential tie around the hand-pump region; alternatively, if the outer panels 17-17' of bags 11-12 are of relatively non-stretch material, these panels 17-17' may in some cases provide a sufficient circumferential tie.
  • the circumferential tie will be understood to effectively confine bags 16-17 against outward expansion in the inflation/deflation cycle, and at the same time to substantially limit the volumetric requirements for recycled supply of pressure fluid in the inflation/deflation cycle.
  • squeezing pressure at the phalanx, is effectively localized to the circumference of the thumb, to the circumference of each digit, and to adjacent regions of the palm and dorsum of the hand, and all vein accumulations of blood within this limited (phalanx and adjacent palm) region are constricted simultaneously, in imitation of a clenched-fist actuation of the hand pump.
  • the thumb and all digits remain exposed, as for periodic inspection of circulation, for nerve-reaction testing, and for inspection of therapeutic progress in reduction of swelling.
  • Figs. 4 and 5 illustrate another embodiment wherein a single inflatable bag 40 is so formed as to provide inflation/deflation action at the indicated phalanx and adjacent areas of dorsum and palm of the hand.
  • the bag 40 comprises two like panels 41-42 of generally rectangular outline, wherein four digit openings 43-44-45-46 are in spaced transverse array at the longitudinal middle of the rectangular outline; at symmetrically located longitudinal and transverse offset from the array 43 ... 46 are two further openings 47-48, each of which is sized for thumb accommodation.
  • a course 49 of bonded seal extends around the entire rectangular periphery and is completed to an inflation pipe connection 50; this seal course is indicated by stippling, as is also a similar circumferentially complete seal of panels 41-42 to each other around each of the thumb and digit openings 43 ... 48.
  • the panel 41 which is to be applied adjacent the skin is flock-coated for comfort, and this panel may also be porous, foraminated or punctured, for venting of pressure fluid during periods between pulsed inflations of the bag.
  • the digits are inserted through openings 43 ... 46 with the thumb accommodated through opening 47; and if the left hand is to be treated, the digits are served by the same openings while the thumb is passed through opening 48.
  • separate halves of the bag are folded-back to lap regions of the dorsum and palm adjacent the phalanx of the thumb and digits. Lateral edges 51-52 of the bag are then overlapped, as suggested in Fig. 5 for a left-hand situation.
  • Adhesive tape can retain the wrapped condition while an orthopedic cast is being applied, or a circumferential tie can be established by wrapped gauze or muslin in the manner described in connection with Fig. 3. Pulsed cycles of inflation/deflation action will be seen to focus squeezing, vein-compressing local forces simultaneously around the thumb and each digit, at the phalanx and adjacent regions of the palm.
  • the embodiment of Fig. 6 provides stimulation action similar to that afforded by the embodiment of Figs. 4 and 5, but with greater economy of panel sheet material.
  • the inflatable bag 60 of Fig. 6 will be understood to comprise two like panels 61-62 of flexible sheet material which are peripherally bonded and sealed to each other and to a pressure-fluid connection 63, the course of peripheral seal being shown by stippling.
  • Four digit openings 64-65-66-67 are in spaced slightly arcuate array, and a thumb opening 68 is at offset therefrom; and each of these openings is the site of a local circumferential seal of panels 61-62 to each other, as suggested by stippling.
  • Peripheral profiling is characterized by a generally straight proximal edge L and by divergent lobe or tab contours M-N along the opposite edge, beyond the digit openings.
  • both panels 61-62 have flock-coated outer surfaces, so that a right hand may be served by thumb and digit insertions via the panel-61 side of the bag, and so that a left hand is similarly served via the panel-62 side.
  • the tab formations M-N are folded back over the dorsum of the involved hand, and adhesive tape will temporarily retain the wrapped application pending gauze, muslin and/or orthopedic-cast development of a circumferential tie.
  • the maximum inflated volume is in the order of 200 cc, and on deflation the inflated volume can be expected to reduce to 75 to 100 cc.
  • the pressure-fluid supply equipment 15 may be relatively small and convenient for table-top or shelf-mounting, with flexible-hose and disconnectable coupling to the inlet pipe (13-14, 50, 63); this is true, whether the supply and control means 15 is merely timed valving to assure programmed delivery of pressure pulses of a fluid, such as oxygen from a locally available tank supply, or the means 15 incorporates its own pumping and/or accumulator mechanism to provide the needed pressure fluid. Whatever the alternative, time-delay devices and their adjustability are all well known and therefore the supply means 15 may take on a variety of different physical embodiments.
  • the inflatable device should be inflated in one second or less, it is perhaps more accurate to state that in our experience to date the inflation should be as quick as possible, to imitate the speed with which involved veins are compressionally squeezed in a quick clenching of the fist.
  • Such fast inflation imparts a jerk or sharply pulsed action in return-blood flow, and such action is believed to be helpful in reducing swelling and pain. It is believed that maximum velocity, however transient upon pulsed excitation, is more important than total blood flow.
  • each check valve has check-valve formations, and the downstream side of each check valve is a trap-like situs for undesired accumulation of solids or clotting which may not otherwise be flushed through the venous-return system; it is believed that with bag inflation as rapid as possible, the opening phase for each check valve is correspondingly rapid, thus locally stirring trapped return-flow blood and reducing the chances of a clotting constriction of return-flow passages.
  • the peak pressure P for any delivered inflation impulse should be that which is sufficient to produce the appropriate venous impulse, whilst not being too uncomfortable for the patient to tolerate. This will of course mean a different peak pressure P which will be various, depending upon the particular patient and his affliction. However, it can be said that, in our experience to date, a peak-pressure within the inflatable device of 200 to 220-mm Hg has been satisfactory. Such peak pressure has produced comfortable actuation of the patient's hand pump, in the circumstance wherein the supply apparatus 15 has provided time-switched delivery of oxygen from a pressurized tank and, alternatively, in the circumstance wherein the supply apparatus 15 has generated its own delivery of pressurized pulses of local air; in both cases, the inflation time a was approximately 0.4 second.
  • the total period (a+b) of the inflation/deflation cycle will also be various, depending upon the confronting pathological condition and, in particular, on the severity of venous obstruction and on how quickly the physiological venous pump becomes filled. As a rough guide, it can be said that in severe venous obstruction, as in a limb with marked swelling, the period of the cycle might be as frequent as every 10 seconds. In moderate swelling, 30 seconds would probably be adequate, whereas for maintenance purposes a 60-second cycle should suffice.
  • the frequency of the cycle can be audibly monitored by the clinician, listening to the flow in posterior veins of the radius or ulna with a Doppler monitor.
  • the interval between inflation pulses is very much greater than the indicated rapid inflation time a , it is our further experience that the deflation time should be as short as possible, with deflation commencing automatically at achievement of predetermined peak pressure.
  • a timer within apparatus 15 reinitiates the cycle upon predetermined time-out of the interval b .
  • an inflatable mitt is provided by an inner glove 80 within an outer glove 81, the finger and thumb extremities of both gloves being truncated, to allow for installed exposure of these extremities of the hand, when the mitt is in use.
  • These gloves are sealed to each other, via peripherally continuous seals 82-83-84-85-86 around each of the thumb and finger openings, and by another such seal 87 around the wrist opening.
  • a reinforcement patch 88 is shown protecting the point of inflation-tube (89) entry to the bag region defined by and between the sealed gloves 80-81.
  • the outer glove 81 is of relatively non-stretchable material, as compared to the relatively flexible and stretchable nature or the inner glove 80, then the outer glove 81 in some cases may provide an adequate circumferential tie; generally, however, a gauze wrap as in Fig. 3 is preferred, for greater limitation of the requisite inflation volume.
  • Fig. 9 The embodiment of Fig. 9 will be recognized for its similarity to Fig. 8, and therefore the same reference numbers have been used where appropriate.
  • the difference in Fig. 9 is that a peripherally continuous seal 90 is developed between gloves 80-81 around the dorsum and palm, in order to further limit the requisite inflation of the device.
  • the gloves 80-81 may be merely laminated to each other.
  • inflation/deflation procedures are as described for other embodiments.
  • the panels 61-62 may be bonded to each other within the entire area of tab formations M-N, i.e., outwardly of a sealed inflation perimeter which runs a course 70 suggested by phantom lines, in closely spaced distal adjacency to the digit openings 64 ... 67. That being the case, the tab formations M-N are not part of the inflatable volume but they can be folded back over the dorsum and adhesively or otherwise integrated into the circumferential-tie development.
  • the pulse pressures are applied with at least equal effectiveness, circumferentially and individually around the proximal phalanges of the thumb and all digits, and to the adjacent region of the palm. This result is achieved without applying inflation pressure directly against the dorsum of the hand; however, in reaction to development of inflation pressure directly over the involved palm-side region, the dorsum receives an indirect application of pressure via hoop tension in the circumferential tie.

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)
  • Orthopedics, Nursing, And Contraception (AREA)
EP19860307731 1985-12-16 1986-10-07 Medical appliance for the hand Expired EP0228768B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80959085A 1985-12-16 1985-12-16
US809590 1991-12-17

Publications (3)

Publication Number Publication Date
EP0228768A2 EP0228768A2 (en) 1987-07-15
EP0228768A3 EP0228768A3 (en) 1987-09-09
EP0228768B1 true EP0228768B1 (en) 1991-12-11

Family

ID=25201701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860307731 Expired EP0228768B1 (en) 1985-12-16 1986-10-07 Medical appliance for the hand

Country Status (7)

Country Link
EP (1) EP0228768B1 (da)
DE (1) DE3682888D1 (da)
DK (1) DK167335B1 (da)
ES (1) ES2007024A6 (da)
GR (1) GR862883B (da)
IE (1) IE59480B1 (da)
PT (1) PT83814B (da)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4809684A (en) * 1985-12-16 1989-03-07 Novamedix Limited Pressure appliance for the hand for aiding circulation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153413A (en) * 1962-01-23 1964-10-20 Jobst Institute Pressure bandage-splint
DE2606729C3 (de) * 1976-02-19 1980-07-17 Hermann 2000 Hamburg Mohr Gerät zur therapeutischen Behandlung
US4479490A (en) * 1978-04-17 1984-10-30 Dedo Richard G Cast padding
GB2141938B (en) * 1983-06-22 1986-11-12 Arthur Michael Newsam Gardner Medical appliance

Also Published As

Publication number Publication date
GR862883B (en) 1987-04-27
DK591386D0 (da) 1986-12-09
EP0228768A2 (en) 1987-07-15
EP0228768A3 (en) 1987-09-09
PT83814A (en) 1986-12-01
DK167335B1 (da) 1993-10-18
PT83814B (pt) 1993-01-29
IE59480B1 (en) 1994-03-09
DK591386A (da) 1987-06-17
ES2007024A6 (es) 1989-06-01
IE862654L (en) 1987-06-16
DE3682888D1 (de) 1992-01-23

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