Compression device

Abstract

Compression device (1) for application circumferentially around a patient's limb (10), comprising a) a first band portion (20a) and a second band portion (20b), both band portions (20) being arrangeable along at least a part of the circumference of the limb for creating radial pressure on the limb, b) a spine element (30), extending in axial direction (100) when the compression device is applied around the limb, and comprising a first and a second guide opening (40a, 40b) for guiding the first and the second band portions, respectively. The guide openings (40a, 40b) are arranged offset in axial direction with respect to each other such that, when the first band portion is arranged along at least a part of the circumference of the limb and guided through the first guide opening, and the second band portion is arranged along at least a part of the circumference of the limb, parallel to the first band portion, and guided through the second guide opening, the band portions overlap in an axial direction.

Claims

1. Compression device for application circumferentially around a patient's limb, the limb defining axial, radial and circumferential directions, wherein the compression device comprises a) a first band portion, a second band portion, and a third band portion, with the first, second, and third band portions being arrangeable along at least a part of the circumference of the limb for creating radial pressure on the limb, b) a spine element, extending in axial direction when the compression device is applied around the limb, and comprising a first guide opening, a second guide opening, and a third guide opening for guiding the first band portion, the second band portion, and the third band portion, respectively, wherein the first band portion comprises a first end portion and second end portion, the first end portion is permanently connected to the spine element the first, second, and third guide openings being arranged offset in axial direction with respect to each other such that, when the first band portion is arranged along at least a first part of the circumference of the limb and the second end portion of the first band portion is guided through the first guide opening and is folded back onto itself, and the second band portion is arranged along at least a second part of the circumference of the limb, parallel to the first band portion, and guided through the second guide opening, and the third band portion is arranged along at least a third part of the circumference of the limb, parallel to the first band portion and second band portion, and guided through the third guide opening, the second band portion overlaps the first and third band portions in an axial direction; and wherein the second band portion releasably affixes to an outer portion of the first band portion and an outer portion of the third band portion.

2. compression device according to claim 1, wherein the first and third band portions extend counter-clockwise in a circumferential direction around the limb, and the second band portion extends clockwise in a circumferential direction around the limb.

3. Compression device according to claim 1, wherein the first and second guide align relative to each other overlap in axial direction.

4. Compression device according to claim 1, wherein the spine element is rigid.

5. Compression device according to claim 1, wherein the spine element is a single piece.

6. Compression device according to claim 1, wherein the spine element has an elongated shape.

7. Compression device according to claim 1, wherein the spine element comprises one half of a zipper for attaching an extension element to the spine element.

8. Compression device according to claim 1, wherein the first and third guide openings have center points that are offset relative to each other in axial direction.

9. Compression device according to claim 1, wherein the first and third band portions each include a fixation patch at an outer surface that releasably affixes with a second end portion of the second band portion.

10. Compression device according to claim 9, wherein the second end portion of the second band portion comprises a fixation area.

11. Compression device according to claim 1, wherein the first guide opening and/or the second guide opening has the shape of an elongated slit.

12. Compression device according to claim 11, wherein the longitudinal length of the elongated slit is oriented in axial direction, when the compression device is applied to the limb.

13. Compression device according to claim 1, wherein the spine element further comprises one or more further guide openings, wherein the first and the second guide openings and the further guide openings are arranged in two parallel rows of guide openings.

14. Compression device according to claim 13, wherein the two parallel rows extend in axial direction and are spaced from each other in circumferential direction.

Description

(1) The invention will now be described in more detail with reference to the following Figures exemplifying particular embodiments of the invention.

(2) FIG. 1 Perspective view of a first compression device according to the present disclosure, partially applied around a patient's lower leg;

(3) FIG. 2 Perspective front view of the first compression device;

(4) FIG. 3 Plan view of the spine element of the first compression device;

(5) FIG. 4 Plan view of the first compression device;

(6) FIG. 5 Plan view of a second compression device according to the present disclosure, comprising a zipper; and

(7) FIG. 6 Plan view of a third compression device according to the present disclosure, comprising a zipper and an extension element.

(8) Herein below various embodiments of the present invention are described and shown in the drawings wherein like elements are provided with the same reference numbers.

(9) FIG. 1 shows, in a sketched perspective view, a patient's limb 10, a leg, with a first compression device 1 according to the present disclosure, partially applied around the lower leg. The compression device 1 comprises six band portions 20, arranged along the circumference of the limb 10.

(10) The limb 10, around which the compression device 1 is to be applied, defines axial directions 100, which are directions parallel to a central axis 99 of the limb 10, and radial directions 110, which are directions perpendicular to the axial directions 100, from or towards the central axis 99. The limb 10 also defines circumferential directions 120, which are directions along the circumference of the limb 10. When explaining a compression device, a reference to a direction is meant to refer to the direction when the compression device is applied to a patient's limb 10 in a way shown in FIG. 1, i.e. in a normal way.

(11) The band portions 20 are elastic, i.e. they can be stretched in their length direction and strive to return to their original length. They comprise an elastic material. Elastic band portions 20 may, for example, comprise

(12) a) a laminate of polyester knitted fabric and polyurethane foam, such as those marketed by Rubberlite, Huntington, U.S.A.,

(13) b) polyester fabric, such as RP-M-767 or RF-M-2877 manufactured by Green Textiles, Spartanburg, U.S.A.,

(14) c) Breathoprene, available from AccuMed Innovative Technologies, or

(15) d) AirFlex 2, available from Eastex Products Inc., Holbrook, Mass.

(16) The stretch behavior of the elastic material is preferably selected such, that the elongation of a band portion 20, when exposed to a longitudinal (along-band) force of 10N per 1 cm width of the band portion is more than 5%; but less than 40%, and preferably is less than 20%.

(17) Also, an axial overlap of two band portions 20 should not cause significant indents on the skin. Therefore, preferably, a band portion 20 is compressible and/or soft. For the same reason, preferably, a band portion 20 is thin, e.g. has a thickness of less than 2 mm, preferably less than 1 mm, and more preferably less than 0.5 mm.

(18) The band portions 20 can be stretched or expanded elastically in circumferential directions 120. They are applied under tension circumferentially around the limb 10 and are affixed under tension such that each band portion 20 exerts radial pressure on the limb 10. This radial pressure is the therapeutic pressure.

(19) The compression device 1 is only partially applied to the limb 10: The two uppermost band portions 20a and 20b shown in FIG. 1 are shown before fixation. Hence these band portions 20a, 20b do not exert radial pressure on the limb 10. Once these band portions 20a, 20b are affixed under tension and exert pressure, the compression device 1 is completely applied around the limb 10.

(20) FIG. 2 shows, in a perspective front view, the first compression device 1 in greater detail in its fully applied state. The limb 10 is not shown, for greater clarity. Six band portions 20a, 20b, 20c, 20d, 20e, 20f, are applied along the circumference of the limb 10. Each of the band portions 20a, 20b, 20c, 20d, 20e, 20f is permanently attached to a rigid spine element 30, that has an elongated shape. Its long extension is oriented in axial direction 100.

(21) The band portion 20a has a first end portion 21a, which is permanently attached or connected to the spine element 30, and an opposed second end portion 22a, which is guided through a first guide opening 40a of the spine element 30. The second end portion 22a passes through the first guide opening 40a and is folded back upon the band portion 20a. The second end portion 22a is releasably affixed to the band portion 20a by two fixation patches 50, arranged on the radially outer surface of the band portion 20a. The folded-back second end portion 22a can mechanically engage with the fixation patches 50, and is thereby releasably affixed to the band portion 20a and held in place under tension. Specifically, the fixation patches 50 comprise so-called loop material that can mechanically engage with so-called hook material on the end portion 22a. Fixation patches 50 can be mechanically engaged with corresponding fixation areas 80 (shown in FIG. 4) comprising hook material. These fixation areas 80 are arranged on the respective end portions 22a-f of the band portions 20a-f. Fixation areas 80 can be released or disengaged from the fixation patches 50 manually. The fixation areas 80 and the fixation patches 50 thus facilitate releasable fixation of band portions 20.

(22) All other band portions 20b, 20c, 20d, 20e, 20f are similar to the band portion 20a described in the preceding paragraph and will therefore not be described separately.

(23) One difference, however, is that three band portions, namely the band portions 20a, 20c, and 20e, extend along the circumference of the limb 10 in one circumferential direction 120, namely in a counter-clockwise circumferential direction 120a from their first end portions 21a, 21c, 21e to their respective second end portions 22a, 22c, 22e when viewed from above. The remaining three band portions, namely the band portions 20b, 20d, and 20f, extend along the circumference of the limb in the opposite circumferential direction 120, namely in a clockwise circumferential direction 120b from their first end portions 21b, 21d, 21f to their second end portions 22b, 22d, 22f, when viewed from above.

(24) A cushioning element 35 extends along the side of the spine element 30, where the first end portions of band portions 20a, 20c, 20e are connected to the spine element 30. The cushioning element 35 comprises a resilient foam material. It helps reduce impressions into the skin that might be caused by the spine element 30, and in particular by its edges, when the compression device 1 is fully applied and the tensioned band portions 20 pull the spine element 30 radially onto the skin of the limb 10.

(25) Band portion 20a and band portion 20b are adjacent band portions, because the band portion 20a is the first band portion, and band portion 20b is the second band portion, counted from the top of the compression device. Similarly, band portion 20b and band portion 20c are adjacent band portions, because band portion 20b is the second band portion, and band portion 20c is the third band portion, counted from the top of the compression device 1. Adjacent band portions 20 are thus defined by their position count relative to the top of the compression device 1.

(26) Going from the topmost band portion 20a to the bottom band portion 20f, the direction in which the band portions 20 extend from their respective permanently attached first end portions 21 to their respective second end portions 22 alternates from band portion to band portion between counter-clockwise and clockwise circumferential extension along the circumference of the limb 10. Adjacent band portions 20 thus extend circumferentially in opposed circumferential directions 120, when the compression device 1 is applied around the limb 10. This alternating arrangement helps to obtain a balanced distribution of tension forces on the spine element 30, which makes it easier to keep the spine element 30 in place relative to the limb 10.

(27) In the embodiment of a compression sleeve according to the present disclosure shown in FIGS. 1 and 2, adjacent band portions 20 overlap in axial direction 100. For example, the uppermost band portion 20a overlaps the adjacent band portion 20b, i.e. it is arranged, when the compression device 1 is fully applied, radially outward of the adjacent, second band portion 20b and on the outer surface of the second band portion 20b (except where the second end portion 22b of the second band portion 20b is folded back upon itself and upon a part of the first band portion 20a).

(28) The length of a band portion 20 is defined by its extension in circumferential direction 120, its width by its extension in axial direction 100. About 30 percent of the width of the second band portion 20b, namely the upper 30 percent, are covered by the first band portion 20a. In other words, there is a 30 percent overlap in axial direction (or axial overlap) of the second band portion 20b with the first band portion 20a. This axial overlap between adjacent band portions 20 ensures that axial gaps between adjacent band portions 20 can normally not occur. An axial gap between adjacent band portions 20 might create an area on the limb 10 on which no radial pressure is exerted by the compression device 1. A smaller amount than 30% of axial overlap is possible, but generally a smaller amount of axial overlap increases the risk of axial gaps between adjacent band portions 20. A greater amount of overlap than 30% is possible, but generally a greater amount of axial overlap tends to make the compression device 1 heavier and more awkward to apply, because wider band portions 20 and/or more band portions 20 need to be present and need to be managed.

(29) A similar axial overlap as described above for band portions 20a and 20b exists between the other adjacent band portions 20 of the compression device 1.

(30) Due to the axial overlap, the folded-back second end portion 22b of the second band portion 20b touches the first band portion 20a, the second band portion 20b, and the third band portion 20c. Fixation patches 50 for releasably affixing the second end portion 22b of the second band portion 20b are arranged on the radially outer surfaces of the first band portion 20a and of the third band portion 20c, respectively. Fixation patches 50 for fixating band portions 20 arranged axially between two other adjacent band portions 20 may thus be arranged on those other adjacent band portions 20.

(31) The band portions 20 of the first compression device 1 are guided by respective guide openings 40 in the spine element 30. The spine element 30 comprises six guide openings 40. The uppermost band portion 20a is guided by the uppermost guide opening 40a, the next-lower band portion 20b is guided by the next-lower guide opening 40b, and so on for all band portions 20.

(32) Generally, at least a portion of a band portion 20 can be threaded through a guide opening 40. Once threaded, the band portion can be pulled through the guide opening 40, e.g. in order to tension the band portion 20 for applying radial pressure on the limb 10.

(33) In the compression device shown in FIG. 2, the spine element 30 is adapted such that a band portion 20 can be guided by the guide opening 40 and a part of the band portion 20 already threaded through the guide opening 40 can be folded back upon itself, e.g. for releasable fixation of the band portion 20 in a tensioned state.

(34) The spine element 30 of the compression device 1 shown in FIGS. 1 and 2 is shown in more detail and without band portions 20 in a plan view in FIG. 3. The spine element 30 has an elongated shape and its long extension is oriented in axial direction 100 when the compression device 1 is applied around the limb 10. The spine element 30 is rigid. It is made of polyamide. It may alternatively be made of, for example, metal, reinforced or non-reinforced polymers such as polyester, polycarbonate, Acryl-Butadien-Styrol copolymer, polypropylene, polycarbonate, polyethersulfone or polyvinylchloride.

(35) All guide openings 40 have an identical shape, namely the shape of an elongated slit. The long direction of the slit is oriented in axial direction 100, when the compression device 1 is applied around the limb 10. In other words, their long directions are oriented in the long direction of the spine element 30. In other embodiments, guide openings 40 may have different shapes, and one guide opening 40 may have a different shape than another guide opening 40. Generally, it is preferable if the shape of a guide opening 40 corresponds to the cross section of a band portion 20 which is to be guided by the guide opening 40. The shape of a guide opening 40 is preferably selected such that the band portion 20 can be conveniently manually threaded into and pulled through the guide opening 40.

(36) Each guide opening 40 defines a center point 60, which is defined as the geometric center of the guide opening 40, projected in a plane. The center point 60 of the uppermost guide opening 40a is indicated as 60a in FIG. 3, the center points 60 of the other guide openings 40b, 40c, etc. are indicated correspondingly as 60b, 60c, etc.

(37) Any two guide openings 40 are offset from each other in axial direction 100. In particular, two adjacent guide openings 40 are offset from each other in axial direction 100. That is to say, their center points 60 are on different positions in axial direction 100, i.e. in different axial positions. For example, guide opening 40b and guide opening 40c are adjacent to each other. The center point 60b of guide opening 40b is offset in axial direction 100 from the center point 60c of guide opening 40c by a distance indicated by arrow 70. These two guide openings 40b, 40c are thus considered offset from each other in axial direction 100, or axially offset from each other.

(38) The guide openings 40 restrict axial and radial movement of the band portions 20 guided by them such, that the axial (along-limb) position and the radial (outward distance from limb) position of the band portions 20 is kept and maintained, both when pulling band portions 20 through their respective guide openings 40, and when the band portions 20 are not moving with respect to their respective guide openings 40.

(39) Axial overlap of adjacent guide openings 40 leads to an axial overlap of band portions 20 that are guided by the guide openings 40. This overlap of the band portions 20 is present at least in the vicinity of the spine element 30. For two band portions 20 guided by overlapping adjacent guide openings 40, that are arranged along the circumference of the limb 10 in a normal manner, i.e. parallel to each other, the axial overlap of these band portions 20 is present along the entire circumference of the limb 10.

(40) In the compression device 1 shown in FIGS. 1 and 2, a first end portion 21 of the band portions 20 are permanently connected to the spine element 30. This permanent connection may be done in different manners, e.g. adhesively, by welding or sowing. For each band portion 20, the axial position, in which the first end portion 21 is connected to the spine element 30, is the same axial position in which the second end portion 22 is guided by the guide opening 40. This results in the band portions 20 being arranged along the circumference of the limb 10 parallel to each other and in a direction perpendicular to the long direction of the spine element 30, i.e. perpendicular to the axial direction 100 and thereby purely in a circumferential direction 120. This arrangement of the band portions 20 facilitates easy, quick and orderly application of the compression device 1 around the limb 10.

(41) FIG. 4 shows the compression device 1 of FIGS. 1 and 2, in plan view, when laid out flat. The arrangement of the fixation patches 50, arranged on the radially outer surface of the band portions 20. The fixation patches 50 comprise loop material, i.e. hook-receptive material. They can mechanically engage with fixation areas 80, which comprise hook material on the second end portions 22 of the band portions 20. Fixation areas 80 on every other band portion, namely on band portions 20b, 20d and 20 f, are not visible in FIG. 4, because they are arranged on the underside surfaces of the band portions 20b, 20d, 20f.

(42) It may be worth noting that some band portions 20 comprise fixation patches 50 for releasably affixing not, or not only, the band portion 20 itself, but also for releasably affixing one or two adjacent band portions 20.

(43) An alternative, second compression device 2 according to the invention is shown in FIG. 5 in plan view, laid out flat. The second compression device 2 is identical to the first compression device 1 except that the first end portions 21 of band portions 20 are permanently connected not to the spine element 31 directly, but to an extension element 90 which can be attached to the spine element 31 and separated from it by a zipper 150. The zipper 150 comprises a first half 150a and a matching second half 150b. The first half 150a of the zipper 150 is comprised in the spine element 31, the second half 150b of the zipper 150 is comprised in the extension element 90. The first half 150a of the zipper 150 is arranged at a side edge (i.e. an edge in circumferential direction 120) of the spine element 31. It extends parallel to the long direction of the spine element 31, i.e. in axial direction 100, when the compression device 2 is applied around the limb 10.

(44) When the compression device 2 is in use and is applied around a patient's limb 10, band portions 20b, 20d and 20f are arranged similarly to what is shown in FIG. 2. In use, these band portions 20b, 20d and 20f cover the zipper 150. In order to open the zipper 150, end portions 22b, 22d, 22f of those band portions 20b, 20d and 20f must be disengaged from the fixation patches 50 to which they are engaged when in use, and folded back to some degree in order to make the zipper 150 accessible. The band portions 20b, 20d and 20f do not need to be unthreaded from their respective guide openings 40b, 40d, 40f for the zipper 150 to be accessible. The other band portions 20a, 20c, 20e do not obstruct access to the zipper 150 when in use, and can remain in place, their end portions 22a, 22c, 22e can remain engaged with the corresponding fixation patches 50.

(45) Once band portions 20b, 20d and 20f have been disengaged from their fixation patches 50 and folded back to a sufficient degree, the zipper 150 can be opened. Opening the zipper 150 opens the compression device 2 completely without unthreading the band portions 20 from the guide openings 40. The compression device 2 can then easily be removed from the limb 10. Similarly, the compression device 2 can be put on again without having to thread any band portions 20 into their corresponding guide openings 40. This makes it easier and quicker to put the compression device 2 around the limb 10 and to remove it from the limb 10.

(46) In an alternative, third compression device 3 according to the invention is shown in FIG. 6 in plan view, laid out flat. It is identical to the second compression device 2, except that the extension element 90 is not connectable, via a zipper 150, to the spine element 32 directly. Rather, the first half 150a of the zipper 150 is arranged on a side edge of an interface sheet 160, which is permanently connected to the spine element 32 on the left side edge (in the FIG. 170 of the interface sheet 160. The interface sheet 160 is made of a stretchable, elastic material, similar to the material of which the band portions 20 are made. The interface sheet 160 can thereby be arranged circumferentially around the limb and can be tensioned, like the band portions 20, so that it can exert radial pressure on the limb 10. This pressure is therapeutic pressure.

(47) The interface sheet 160 extends, in axial direction 100, about as far as the spine element 32. In the embodiment shown in FIG. 6, the interface sheet 160 has no band structure, but in alternative embodiments it may have a band structure, wherein band portions, similar to the band portions 20a-f, connect the spine element 32 to the first part 150a of the zipper 150.

(48) The interface sheet 160 carries some of the fixation patches 50, while other fixation patches 50 are arranged on the band portions 20a, 20c, 20f.

(49) The extension element 90 comprises the second part 150b of the zipper 150. It can thus be attached indirectly to the spine element 32 (via the interface sheet 160). The zipper 150 allows to detach the extension element 90 from the spine element 32 by detaching the extension element 90 from the interface sheet 160. Band portions 20a-f are permanently connected with the extension element 90 on the (circumferential) side opposite to the side on which the second half 150b of the zipper 150 can be attached to the first half 150a of the zipper 150.

(50) Because the zipper 150 is not arranged directly on the spine element 32 (opposed to what is the case in the embodiment shown in FIG. 5), band portions 20b, 20d, 20f can be arranged around the limb 10, can be guided through the corresponding guide openings 40b, 40d, 40f, can be tensioned to adjust their lengths to the circumference of the limb 10, and are not folded back upon themselves, but are rather attached to the interface sheet 160 at fixation patches 50 located on the interface sheet 160. This fixation keeps the band portions 20b, 20f, 20f under tension, so that they can create therapeutic pressure. Thus when in use, the band portions 20b, 20d, 20f do not cover the zipper 150. Unlike in the second compression device 2 shown in FIG. 5, the zipper 150 remains accessible when the compression device 3 is in use. It is thus not necessary to disengage any of the end portions 22b, 22d, 22f from the fixation patches 50 in order to gain access to the zipper 150. The adjustment of the length of the band portions 20 according to the limb circumference is not lost. Once the zipper 150 is open, the compression device 3 can be removed quickly and easily from the limb 10. It is contemplated that once the compression device 3 has been removed from the limb, the zipper 150 may allow to put the compression device 3 back on the limb without having to re-adjust the length of the band portions 20.

(51) In an alternative embodiment, not shown in the Figures, the entire outer surface of the interface sheet 160 is covered with hook-receptive material, so that fixation areas 80 on the band portions 20 can be releasably attached anywhere on the outer surface of the interface sheet 160. Individual fixation patches 50 can thereby be made obsolete.

(52) Similarly, in any of the compression devices 1, 2 shown in FIG. 1, 2, 4 or 5, the entire outer surface of a band portion 20 may be covered with, or made of, hook-receptive material, so that a fixation area 80 on a band portions 20 can be releasably attached anywhere on the outer surface of the band portion 20. Again, this may make individual fixation patches 50 obsolete.